diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index 656cb0c3..7ecb90ab 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -36,25 +36,24 @@ jobs: run: make go-tidy - name: Run golangci-lint with cgo env: + # TODO: run separate packages with cgo disabled CGO_ENABLED: 1 uses: golangci/golangci-lint-action@v7 with: version: ${{ env.LINT_VERSION }} + args: internal/bls12381 sign/bls # https://github.com/golangci/golangci-lint-action/issues/244 skip-cache: true - name: Run golangci-lint without cgo env: + # TODO: run separate packages with cgo disabled CGO_ENABLED: 0 uses: golangci/golangci-lint-action@v7 with: version: ${{ env.LINT_VERSION }} - args: --build-tags no_cgo + args: --skip-dirs='^(internal/bls12381|sign/bls)$' # https://github.com/golangci/golangci-lint-action/issues/244 skip-cache: true - - name: Run incorrect builds - run: | - echo "::remove-matcher owner=go::" - make incorrect_builds c-code: strategy: @@ -72,9 +71,9 @@ jobs: - name: Install C formatter run: sudo apt-get install -y clang-format - name: run C format - run: make c-format + run: make recurse cmd="c-format" exclude="./. ./internal/blst ./internal/bls12381/blst_src ./_tmp" - name: run C sanitizers - run: make c-sanitize + run: make recurse cmd="c-sanitize" exclude="./. ./internal/blst ./internal/bls12381/blst_src ./random ./hash ./sign/ecdsa ./_tmp" unit-tests: diff --git a/Makefile b/Makefile index d5984938..8dd3e4c4 100644 --- a/Makefile +++ b/Makefile @@ -31,19 +31,50 @@ else ADX_FLAG := "-O2 -D__BLST_PORTABLE__" endif +# test all packages +.PHONY: test +test: + CGO_ENABLED=1 CGO_CFLAGS=$(ADX_FLAG) go test -coverprofile=$(COVER_PROFILE) $(RACE_FLAG) $(if $(JSON_OUTPUT),-json,) $(if $(VERBOSE),-v,) ./... + + +# recurse through all subdirectories and run the argument command "cmd" +.PHONY: recurse +exclude ?= "" +recurse: + find . -type d | while read dir; do \ + skip="no"; \ + for p in $$exclude; do \ + case "$$dir" in \ + "$$p"*) skip="yes"; break ;; \ + esac; \ + done; \ + if [ "$$skip" = "no" ]; then \ + (make $(cmd) path="$$dir") \ + fi; \ + done + # format C code .PHONY: c-format +path ?= ./ c-format: - clang-format -style=llvm -dump-config > .clang-format - clang-format -i *.c - clang-format -i *.h - rm -f .clang-format + cd $(path) && \ + clang-format -style=llvm -dump-config > .clang-format && \ + if ls *.c >/dev/null 2>&1; then \ + clang-format -i *.c; \ + fi && \ + if ls *.h >/dev/null 2>&1; then \ + clang-format -i *.h; \ + fi && \ + rm -f .clang-format && \ git diff --exit-code + # address sanitization and other checks .SILENT: c-asan +path ?= ./ c-asan: # - address sanitization and other checks (only on linux) + cd $(path) && \ if [ $(UNAME) = "Linux" ]; then \ CGO_CFLAGS=$(ADX_FLAG) CC="clang -O0 -g -fsanitize=address -fno-omit-frame-pointer -fsanitize=leak -fsanitize=undefined -fno-sanitize-recover=all -fsanitize=float-divide-by-zero -fsanitize=float-cast-overflow -fno-sanitize=null -fno-sanitize=alignment" \ LD="-fsanitize=address -fsanitize=leak" go test; \ @@ -54,12 +85,14 @@ c-asan: # memory sanitization .SILENT: c-msan +path ?= ./ c-msan: # - memory sanitization (only on linux and using clang) - (could use go test -msan) # currently, this leads to many false positives, most likely because of assembly code not handled properly # by asan. If you would like to run this command, you can use `NO_MSAN` to diable msan in some C functions. # For instance "void NO_MSAN f() {...}" disables msan in function f. `NO_MSAN` is already defined in # bls12381_utils.h + cd $(path) && \ if [ $(UNAME) = "Linux" ]; then \ CGO_CFLAGS=$(ADX_FLAG) CC="clang -DMSAN -O0 -g -fsanitize=memory -fno-omit-frame-pointer -fsanitize-memory-track-origins" \ LD="-fsanitize=memory" go test; \ @@ -70,9 +103,12 @@ c-msan: # sanitize C code .SILENT: c-sanitize +path ?= ./ c-sanitize: c-asan # - address sanitization and other checks (only on linux) # - memory sanitization (target m-san) is disabled because of multiple false positives + + # Go tidy .PHONY: go-tidy @@ -85,21 +121,3 @@ go-tidy: go-lint: go-tidy # revive -config revive.toml golangci-lint run -v ./... - -# test all packages -.PHONY: test -test: -# root package - CGO_ENABLED=1 CGO_CFLAGS=$(ADX_FLAG) go test -coverprofile=$(COVER_PROFILE) $(RACE_FLAG) $(if $(JSON_OUTPUT),-json,) $(if $(VERBOSE),-v,) -#root package without cgo - CGO_ENABLED=0 go test -tags=no_cgo -coverprofile=$(COVER_PROFILE) $(RACE_FLAG) $(if $(JSON_OUTPUT),-json,) $(if $(VERBOSE),-v,) -# sub packages - go test -coverprofile=$(COVER_PROFILE) $(RACE_FLAG) $(if $(JSON_OUTPUT),-json,) $(if $(VERBOSE),-v,) ./hash - go test -coverprofile=$(COVER_PROFILE) $(RACE_FLAG) $(if $(JSON_OUTPUT),-json,) $(if $(VERBOSE),-v,) ./random - -# test incorrect builds and make sure they fail -.PHONY: incorrect_builds -incorrect_builds: -# both tests should fail - ! CGO_ENABLED=0 go test - ! CGO_ENABLED=1 CGO_CFLAGS=$(ADX_FLAG) go test -tags=no_cgo diff --git a/bls_multisig.go b/_tmp/bls_multisig.go similarity index 96% rename from bls_multisig.go rename to _tmp/bls_multisig.go index 03f55e6e..bd6b6df3 100644 --- a/bls_multisig.go +++ b/_tmp/bls_multisig.go @@ -24,6 +24,7 @@ import ( "fmt" "github.com/onflow/crypto/hash" + "github.com/onflow/crypto/sign" ) // BLS multi-signature using BLS12-381 curve @@ -63,7 +64,7 @@ var popKMAC = internalExpandMsgXOFKMAC128(blsPOPCipherSuite) // The function returns: // - (nil, errNotBLSKey) if the input key is not of type BLS BLS12-381 // - (pop, nil) otherwise -func BLSGeneratePOP(sk PrivateKey) (Signature, error) { +func BLSGeneratePOP(sk sign.PrivateKey) (sign.Signature, error) { _, ok := sk.(*prKeyBLSBLS12381) if !ok { return nil, errNotBLSKey @@ -82,7 +83,7 @@ func BLSGeneratePOP(sk PrivateKey) (Signature, error) { // The function returns: // - (false, errNotBLSKey) if the input key is not of type BLS BLS12-381 // - (validity, nil) otherwise -func BLSVerifyPOP(pk PublicKey, s Signature) (bool, error) { +func BLSVerifyPOP(pk sign.PublicKey, s sign.Signature) (bool, error) { _, ok := pk.(*pubKeyBLSBLS12381) if !ok { return false, errNotBLSKey @@ -107,7 +108,7 @@ func BLSVerifyPOP(pk PublicKey, s Signature) (bool, error) { // G1 membership is not checked. // - (nil, error) if an unexpected error occurs // - (aggregated_signature, nil) otherwise -func AggregateBLSSignatures(sigs []Signature) (Signature, error) { +func AggregateBLSSignatures(sigs []sign.Signature) (sign.Signature, error) { // check for empty list if len(sigs) == 0 { return nil, errBLSAggregateEmptyList @@ -151,7 +152,7 @@ func AggregateBLSSignatures(sigs []Signature) (Signature, error) { // - (nil, errNotBLSKey) if at least one key is not of type BLS BLS12-381 // - (nil, errBLSAggregateEmptyList) if no keys are provided (input slice is empty) // - (aggregated_key, nil) otherwise -func AggregateBLSPrivateKeys(keys []PrivateKey) (PrivateKey, error) { +func AggregateBLSPrivateKeys(keys []sign.PrivateKey) (sign.PrivateKey, error) { // check for empty list if len(keys) == 0 { return nil, errBLSAggregateEmptyList @@ -185,7 +186,7 @@ func AggregateBLSPrivateKeys(keys []PrivateKey) (PrivateKey, error) { // - (nil, errNotBLSKey) if at least one key is not of type BLS BLS12-381 // - (nil, errBLSAggregateEmptyList) no keys are provided (input slice is empty) // - (aggregated_key, nil) otherwise -func AggregateBLSPublicKeys(keys []PublicKey) (PublicKey, error) { +func AggregateBLSPublicKeys(keys []sign.PublicKey) (sign.PublicKey, error) { // check for empty list if len(keys) == 0 { @@ -211,7 +212,7 @@ func AggregateBLSPublicKeys(keys []PublicKey) (PublicKey, error) { // IdentityBLSPublicKey returns an identity public key which corresponds to the point // at infinity in G2 (identity element g2). -func IdentityBLSPublicKey() PublicKey { +func IdentityBLSPublicKey() sign.PublicKey { return &g2PublicKey } @@ -229,7 +230,7 @@ func IdentityBLSPublicKey() PublicKey { // The function returns: // - (nil, errNotBLSKey) if at least one input key is not of type BLS BLS12-381 // - (remaining_key, nil) otherwise -func RemoveBLSPublicKeys(aggKey PublicKey, keysToRemove []PublicKey) (PublicKey, error) { +func RemoveBLSPublicKeys(aggKey sign.PublicKey, keysToRemove []sign.PublicKey) (sign.PublicKey, error) { aggPKBLS, ok := aggKey.(*pubKeyBLSBLS12381) if !ok { @@ -286,7 +287,7 @@ func RemoveBLSPublicKeys(aggKey PublicKey, keysToRemove []PublicKey) (PublicKey, // - (false, error) if an unexpected error occurs // - (validity, nil) otherwise func VerifyBLSSignatureOneMessage( - pks []PublicKey, s Signature, message []byte, kmac hash.Hasher, + pks []sign.PublicKey, s sign.Signature, message []byte, kmac hash.Hasher, ) (bool, error) { // public key list must be non empty, this is checked internally by AggregateBLSPublicKeys aggPk, err := AggregateBLSPublicKeys(pks) @@ -326,7 +327,7 @@ func VerifyBLSSignatureOneMessage( // - (false, error) if an unexpected error occurs // - (validity, nil) otherwise func VerifyBLSSignatureManyMessages( - pks []PublicKey, s Signature, messages [][]byte, kmac []hash.Hasher, + pks []sign.PublicKey, s sign.Signature, messages [][]byte, kmac []hash.Hasher, ) (bool, error) { // check signature length @@ -476,7 +477,7 @@ func VerifyBLSSignatureManyMessages( // - ([]false, error) if an unexpected error occurs // - ([]validity, nil) otherwise func BatchVerifyBLSSignaturesOneMessage( - pks []PublicKey, sigs []Signature, message []byte, kmac hash.Hasher, + pks []sign.PublicKey, sigs []sign.Signature, message []byte, kmac hash.Hasher, ) ([]bool, error) { // boolean array returned when errors occur falseSlice := make([]bool, len(sigs)) diff --git a/bls_thresholdsign.go b/_tmp/bls_thresholdsign.go similarity index 95% rename from bls_thresholdsign.go rename to _tmp/bls_thresholdsign.go index 682c9db2..f50393bf 100644 --- a/bls_thresholdsign.go +++ b/_tmp/bls_thresholdsign.go @@ -29,6 +29,7 @@ import ( "sync" "github.com/onflow/crypto/hash" + "github.com/onflow/crypto/sign" ) // BLS-based threshold signature is an implementation of @@ -54,7 +55,7 @@ type blsThresholdSignatureParticipant struct { // the index of the current participant myIndex int // the current participant private key (a threshold KG output) - myPrivateKey PrivateKey + myPrivateKey sign.PrivateKey } var _ ThresholdSignatureParticipant = (*blsThresholdSignatureParticipant)(nil) @@ -68,19 +69,19 @@ type blsThresholdSignatureInspector struct { // required to reconstruct a signature threshold int // the group public key (a threshold KG output) - groupPublicKey PublicKey + groupPublicKey sign.PublicKey // the group public key shares (a threshold KG output) - publicKeyShares []PublicKey + publicKeyShares []sign.PublicKey // the hasher to be used for all signatures hasher hash.Hasher // the message to be signed. Signature shares and the threshold signature // are verified against this message message []byte // the valid signature shares collected from other participants - shares map[index]Signature + shares map[index]sign.Signature // the threshold group signature. // It is equal to nil if the collected shares are less than `t+1`. - thresholdSignature Signature + thresholdSignature sign.Signature // lock for atomic operations lock sync.RWMutex } @@ -108,11 +109,11 @@ var _ ThresholdSignatureInspector = (*blsThresholdSignatureInspector)(nil) // - (nil, errNotBLSKey) if the private or at least one public key is not of type BLS BLS12-381. // - (pointer, nil) otherwise func NewBLSThresholdSignatureParticipant( - groupPublicKey PublicKey, - sharePublicKeys []PublicKey, + groupPublicKey sign.PublicKey, + sharePublicKeys []sign.PublicKey, threshold int, myIndex int, - myPrivateKey PrivateKey, + myPrivateKey sign.PrivateKey, message []byte, dsTag string, ) (*blsThresholdSignatureParticipant, error) { @@ -165,8 +166,8 @@ func NewBLSThresholdSignatureParticipant( // - (nil, errNotBLSKey) at least one public key is not of type pubKeyBLSBLS12381 // - (pointer, nil) otherwise func NewBLSThresholdSignatureInspector( - groupPublicKey PublicKey, - sharePublicKeys []PublicKey, + groupPublicKey sign.PublicKey, + sharePublicKeys []sign.PublicKey, threshold int, message []byte, dsTag string, @@ -199,7 +200,7 @@ func NewBLSThresholdSignatureInspector( threshold: threshold, message: message, hasher: NewExpandMsgXOFKMAC128(dsTag), - shares: make(map[index]Signature), + shares: make(map[index]sign.Signature), thresholdSignature: nil, groupPublicKey: groupPublicKey, // groupPublicKey is the group public key corresponding to the group secret key publicKeyShares: sharePublicKeys, // sharePublicKeys are the public key shares corresponding to the private key shares @@ -215,7 +216,7 @@ func NewBLSThresholdSignatureInspector( // The function returns // - (nil, error) if an unexpected error occurs // - (signature, nil) otherwise -func (s *blsThresholdSignatureParticipant) SignShare() (Signature, error) { +func (s *blsThresholdSignatureParticipant) SignShare() (sign.Signature, error) { share, err := s.myPrivateKey.Sign(s.message, s.hasher) if err != nil { return nil, fmt.Errorf("share signing failed: %w", err) @@ -244,7 +245,7 @@ func (s *blsThresholdSignatureInspector) validIndex(orig int) error { // the public key share and message. // - (false, invalidInputsError) if `orig` is an invalid index value // - (false, error) for all other unexpected errors -func (s *blsThresholdSignatureInspector) VerifyShare(orig int, share Signature) (bool, error) { +func (s *blsThresholdSignatureInspector) VerifyShare(orig int, share sign.Signature) (bool, error) { // validate index if err := s.validIndex(orig); err != nil { return false, err @@ -261,7 +262,7 @@ func (s *blsThresholdSignatureInspector) VerifyShare(orig int, share Signature) // - (true, nil): if the signature is valid // - (false, nil): if the signature is invalid // - (false, error): for all other unexpected errors -func (s *blsThresholdSignatureInspector) VerifyThresholdSignature(thresholdSignature Signature) (bool, error) { +func (s *blsThresholdSignatureInspector) VerifyThresholdSignature(thresholdSignature sign.Signature) (bool, error) { return s.groupPublicKey.Verify(thresholdSignature, s.message, s.hasher) } @@ -326,7 +327,7 @@ func (s *blsThresholdSignatureInspector) hasShare(orig index) bool { // - (false, nil): if not enough shares were collected and no error occurred // - (false, invalidInputsError): if index is invalid // - (false, duplicatedSignerError): if a signature for the index was previously added -func (s *blsThresholdSignatureInspector) TrustedAdd(orig int, share Signature) (bool, error) { +func (s *blsThresholdSignatureInspector) TrustedAdd(orig int, share sign.Signature) (bool, error) { // validate index if err := s.validIndex(orig); err != nil { return false, err @@ -361,7 +362,7 @@ func (s *blsThresholdSignatureInspector) TrustedAdd(orig int, share Signature) ( // public key is not considered an invalid input. // - duplicatedSignerError: if signer was already added. // - other errors: if an unexpected exception occurred. -func (s *blsThresholdSignatureInspector) VerifyAndAdd(orig int, share Signature) ( +func (s *blsThresholdSignatureInspector) VerifyAndAdd(orig int, share sign.Signature) ( shareIsValid bool, enoughSharesCollected bool, err error) { // validate index if err := s.validIndex(orig); err != nil { @@ -404,7 +405,7 @@ func (s *blsThresholdSignatureInspector) VerifyAndAdd(orig int, share Signature) // - (nil, invalidInputsError): if the constructed signature failed to verify against the group public key and stored // message. This post-verification is required for safety, as `TrustedAdd` allows adding invalid signatures. // - (nil, error): for any other unexpected error. -func (s *blsThresholdSignatureInspector) ThresholdSignature() (Signature, error) { +func (s *blsThresholdSignatureInspector) ThresholdSignature() (sign.Signature, error) { s.lock.Lock() defer s.lock.Unlock() @@ -432,7 +433,7 @@ func (s *blsThresholdSignatureInspector) ThresholdSignature() (Signature, error) // - (nil, errInvalidSignature): if at least one collected share does not serialize to a valid BLS signature. // - (nil, invalidInputsError): if the constructed signature failed to verify against the group public key and stored message. // - (nil, error): for any other unexpected error. -func (s *blsThresholdSignatureInspector) reconstructThresholdSignature() (Signature, error) { +func (s *blsThresholdSignatureInspector) reconstructThresholdSignature() (sign.Signature, error) { if !s.enoughShares() { return nil, notEnoughSharesErrorf("number of signature shares %d is not enough, %d are required", @@ -497,7 +498,7 @@ func (s *blsThresholdSignatureInspector) reconstructThresholdSignature() (Signat // - (nil, errInvalidSignature): if at least one of the first (threshold+1) signatures does not serialize to a valid E1 point // - (threshold_sig, nil): otherwise func BLSReconstructThresholdSignature(size int, threshold int, - shares []Signature, signers []int) (Signature, error) { + shares []sign.Signature, signers []int) (sign.Signature, error) { if size < ThresholdSignMinSize || size > ThresholdSignMaxSize { return nil, invalidInputsErrorf( @@ -591,8 +592,8 @@ func EnoughShares(threshold int, sharesNumber int) (bool, error) { // - `size` is not in [`ThresholdSignMinSize`, `ThresholdSignMaxSize`] // - `threshold` value is not in interval `[1, size-1]` // - ([]privKeyShares, []pubKeyShares, groupPubKey, nil): otherwise -func BLSThresholdKeyGen(size int, threshold int, seed []byte) ([]PrivateKey, - []PublicKey, PublicKey, error) { +func BLSThresholdKeyGen(size int, threshold int, seed []byte) ([]sign.PrivateKey, + []sign.PublicKey, sign.PublicKey, error) { if size < ThresholdSignMinSize || size > ThresholdSignMaxSize { return nil, nil, nil, invalidInputsErrorf( @@ -632,9 +633,9 @@ func BLSThresholdKeyGen(size int, threshold int, seed []byte) ([]PrivateKey, // group public key generatorScalarMultG2(&X0, &a[0]) // export the keys - skShares := make([]PrivateKey, size) - pkShares := make([]PublicKey, size) - var pkGroup PublicKey + skShares := make([]sign.PrivateKey, size) + pkShares := make([]sign.PublicKey, size) + var pkGroup sign.PublicKey for i := 0; i < size; i++ { skShares[i] = newPrKeyBLSBLS12381(&x[i]) pkShares[i] = newPubKeyBLSBLS12381(&y[i]) diff --git a/bls_thresholdsign_core.c b/_tmp/bls_thresholdsign_core.c similarity index 100% rename from bls_thresholdsign_core.c rename to _tmp/bls_thresholdsign_core.c diff --git a/bls_thresholdsign_include.h b/_tmp/bls_thresholdsign_include.h similarity index 100% rename from bls_thresholdsign_include.h rename to _tmp/bls_thresholdsign_include.h diff --git a/bls_thresholdsign_test.go b/_tmp/bls_thresholdsign_test.go similarity index 98% rename from bls_thresholdsign_test.go rename to _tmp/bls_thresholdsign_test.go index 279813cc..2d8eb63e 100644 --- a/bls_thresholdsign_test.go +++ b/_tmp/bls_thresholdsign_test.go @@ -31,6 +31,8 @@ import ( log "github.com/sirupsen/logrus" "github.com/stretchr/testify/assert" "github.com/stretchr/testify/require" + + "github.com/onflow/crypto/sign" ) func TestBLSThresholdSignature(t *testing.T) { @@ -279,7 +281,7 @@ func testCentralizedStatefulAPI(t *testing.T) { t.Run("constructor errors", func(t *testing.T) { // invalid keys size index := rand.Intn(n) - pkSharesInvalid := make([]PublicKey, ThresholdSignMaxSize+1) + pkSharesInvalid := make([]sign.PublicKey, ThresholdSignMaxSize+1) tsFollower, err := NewBLSThresholdSignatureInspector(pkGroup, pkSharesInvalid, threshold, thresholdSignatureMessage, thresholdSignatureTag) assert.Error(t, err) assert.True(t, IsInvalidInputsError(err)) @@ -288,7 +290,7 @@ func testCentralizedStatefulAPI(t *testing.T) { seed := make([]byte, KeyGenSeedMinLen) _, err = rand.Read(seed) require.NoError(t, err) - skEcdsa, err := GeneratePrivateKey(ECDSAP256, seed) + skEcdsa, err := sign.GeneratePrivateKey(sign.ECDSAP256, seed) require.NoError(t, err) tmp := pkShares[0] pkShares[0] = skEcdsa.PublicKey() @@ -553,11 +555,11 @@ func tsRunChan(proc *testDKGProcessor, sync *sync.WaitGroup, t *testing.T) { // This stucture holds the keys and is needed for the stateless test type statelessKeys struct { // the current participant private key (a DKG output) - myPrivateKey PrivateKey + myPrivateKey sign.PrivateKey // the group public key (a DKG output) - groupPublicKey PublicKey + groupPublicKey sign.PublicKey // the group public key shares (a DKG output) - publicKeyShares []PublicKey + publicKeyShares []sign.PublicKey } // Centralized test of threshold signature protocol using the threshold key generation. @@ -575,7 +577,7 @@ func testCentralizedStatelessAPI(t *testing.T) { // signature hasher kmac := NewExpandMsgXOFKMAC128(thresholdSignatureTag) // generate signature shares - signShares := make([]Signature, 0, n) + signShares := make([]sign.Signature, 0, n) signers := make([]int, 0, n) // fill the signers list and shuffle it for i := 0; i < n; i++ { @@ -652,7 +654,7 @@ func BenchmarkSignatureReconstruction(b *testing.B) { // signature hasher kmac := NewExpandMsgXOFKMAC128(thresholdSignatureTag) // generate signature shares - signShares := make([]Signature, 0, threshold+1) + signShares := make([]sign.Signature, 0, threshold+1) signers := make([]int, 0, threshold+1) // create (t+1) signatures of the first randomly chosen signers for i := 0; i < threshold+1; i++ { diff --git a/dkg.go b/_tmp/dkg.go similarity index 99% rename from dkg.go rename to _tmp/dkg.go index f080f471..7506a4e5 100644 --- a/dkg.go +++ b/_tmp/dkg.go @@ -21,6 +21,8 @@ package crypto import ( "errors" "fmt" + + "github.com/onflow/crypto/sign" ) // DKG stands for distributed key generation. In this package, DKG @@ -76,7 +78,7 @@ type DKGState interface { // - all the public key shares corresponding to the participants private // key shares // - the finalized private key which is the current participant's own private key share - End() (PrivateKey, PublicKey, []PublicKey, error) + End() (sign.PrivateKey, sign.PublicKey, []sign.PublicKey, error) // NextTimeout set the next timeout of the protocol if any timeout applies. // Some protocols could require more than one timeout NextTimeout() error diff --git a/dkg_core.c b/_tmp/dkg_core.c similarity index 100% rename from dkg_core.c rename to _tmp/dkg_core.c diff --git a/dkg_feldmanvss.go b/_tmp/dkg_feldmanvss.go similarity index 99% rename from dkg_feldmanvss.go rename to _tmp/dkg_feldmanvss.go index 959da868..ea09f6c2 100644 --- a/dkg_feldmanvss.go +++ b/_tmp/dkg_feldmanvss.go @@ -26,6 +26,7 @@ import ( "github.com/onflow/crypto/hash" "github.com/onflow/crypto/random" + "github.com/onflow/crypto/sign" ) // Implements Feldman Verifiable Secret Sharing (VSS) using @@ -157,7 +158,7 @@ func (s *feldmanVSSstate) Start(seed []byte) error { // - dkgFailureError if the private key and vector are inconsistent. // - dkgFailureError if the public key share or group public key is identity. // - nil otherwise. -func (s *feldmanVSSstate) End() (PrivateKey, PublicKey, []PublicKey, error) { +func (s *feldmanVSSstate) End() (sign.PrivateKey, sign.PublicKey, []sign.PublicKey, error) { if !s.running { return nil, nil, nil, dkgInvalidStateTransitionErrorf("dkg is not running") } @@ -172,7 +173,7 @@ func (s *feldmanVSSstate) End() (PrivateKey, PublicKey, []PublicKey, error) { Y := newPubKeyBLSBLS12381(&s.vA[0]) // The participants public keys - y := make([]PublicKey, s.size) + y := make([]sign.PublicKey, s.size) for i, p := range s.y { y[i] = newPubKeyBLSBLS12381(&p) } diff --git a/dkg_feldmanvssq.go b/_tmp/dkg_feldmanvssq.go similarity index 99% rename from dkg_feldmanvssq.go rename to _tmp/dkg_feldmanvssq.go index bc1bf72a..29b03ed9 100644 --- a/dkg_feldmanvssq.go +++ b/_tmp/dkg_feldmanvssq.go @@ -23,6 +23,8 @@ import "C" import ( "fmt" + + "github.com/onflow/crypto/sign" ) // Implements Feldman Verifiable Secret Sharing (VSS) using @@ -183,7 +185,7 @@ func (s *feldmanVSSQualState) NextTimeout() error { // - dkgFailureError if the public key share or group public key is identity. // - dkgInvalidStateTransition if Start() was not called, or NextTimeout() was not called twice // - nil otherwise. -func (s *feldmanVSSQualState) End() (PrivateKey, PublicKey, []PublicKey, error) { +func (s *feldmanVSSQualState) End() (sign.PrivateKey, sign.PublicKey, []sign.PublicKey, error) { if !s.running { return nil, nil, nil, dkgInvalidStateTransitionErrorf("dkg protocol %d is not running", s.myIndex) } @@ -219,7 +221,7 @@ func (s *feldmanVSSQualState) End() (PrivateKey, PublicKey, []PublicKey, error) Y := newPubKeyBLSBLS12381(&s.vA[0]) // The participants public keys - y := make([]PublicKey, s.size) + y := make([]sign.PublicKey, s.size) for i, p := range s.y { y[i] = newPubKeyBLSBLS12381(&p) } diff --git a/dkg_include.h b/_tmp/dkg_include.h similarity index 100% rename from dkg_include.h rename to _tmp/dkg_include.h diff --git a/dkg_jointfeldman.go b/_tmp/dkg_jointfeldman.go similarity index 98% rename from dkg_jointfeldman.go rename to _tmp/dkg_jointfeldman.go index 14e05c6c..975bbc62 100644 --- a/dkg_jointfeldman.go +++ b/_tmp/dkg_jointfeldman.go @@ -23,6 +23,8 @@ import "C" import ( "fmt" + + "github.com/onflow/crypto/sign" ) // Implements Joint Feldman (Pedersen) protocol using @@ -189,7 +191,7 @@ func (s *JointFeldmanState) NextTimeout() error { // - dkgFailureError if the public key share or group public key is identity. // - dkgInvalidStateTransitionError Start() was not called, or NextTimeout() was not called twice // - nil otherwise. -func (s *JointFeldmanState) End() (PrivateKey, PublicKey, []PublicKey, error) { +func (s *JointFeldmanState) End() (sign.PrivateKey, sign.PublicKey, []sign.PublicKey, error) { if !s.jointRunning { return nil, nil, nil, dkgInvalidStateTransitionErrorf("dkg protocol %d is not running", s.myIndex) } @@ -238,7 +240,7 @@ func (s *JointFeldmanState) End() (PrivateKey, PublicKey, []PublicKey, error) { Y := newPubKeyBLSBLS12381(jointPublicKey) // The participants public keys - y := make([]PublicKey, s.size) + y := make([]sign.PublicKey, s.size) for i, p := range jointy { y[i] = newPubKeyBLSBLS12381(&p) } diff --git a/dkg_test.go b/_tmp/dkg_test.go similarity index 99% rename from dkg_test.go rename to _tmp/dkg_test.go index 8226b07b..e412ccce 100644 --- a/dkg_test.go +++ b/_tmp/dkg_test.go @@ -29,6 +29,7 @@ import ( "testing" "time" + "github.com/onflow/crypto/sign" log "github.com/sirupsen/logrus" "github.com/stretchr/testify/assert" "github.com/stretchr/testify/require" @@ -464,7 +465,7 @@ type testDKGProcessor struct { // index of the current participant in the protocol current int // group public key, output of DKG - pk PublicKey + pk sign.PublicKey // final disqualified list disqualified []bool // final output error of the DKG diff --git a/no_cgo.go b/_tmp/no_cgo.go similarity index 63% rename from no_cgo.go rename to _tmp/no_cgo.go index 3726a17c..10f87806 100644 --- a/no_cgo.go +++ b/_tmp/no_cgo.go @@ -13,6 +13,7 @@ import ( "fmt" "github.com/onflow/crypto/hash" + "github.com/onflow/crypto/sign" ) const ( @@ -28,25 +29,27 @@ func withFeature(feature string) string { } type blsBLS12381Algo struct { - algo SigningAlgorithm + algo sign.SigningAlgorithm } -// BLS context on the BLS 12-381 curve -var blsInstance *blsBLS12381Algo -func (a *blsBLS12381Algo) generatePrivateKey(ikm []byte) (PrivateKey, error) { +func (a *blsBLS12381Algo) GeneratePrivateKey(ikm []byte) (sign.PrivateKey, error) { panic(withFeature("BLS signature")) } -func (a *blsBLS12381Algo) decodePrivateKey(privateKeyBytes []byte) (PrivateKey, error) { +func (a *blsBLS12381Algo) DecodePrivateKey(privateKeyBytes []byte) (sign.PrivateKey, error) { panic(withFeature("BLS signature")) } -func (a *blsBLS12381Algo) decodePublicKey(publicKeyBytes []byte) (PublicKey, error) { +func (a *blsBLS12381Algo) DecodePublicKey(publicKeyBytes []byte) (sign.PublicKey, error) { panic(withFeature("BLS signature")) } -func (a *blsBLS12381Algo) decodePublicKeyCompressed(publicKeyBytes []byte) (PublicKey, error) { +func (a *blsBLS12381Algo) DecodePublicKeyCompressed(publicKeyBytes []byte) (sign.PublicKey, error) { + panic(withFeature("BLS signature")) +} + +func (a *blsBLS12381Algo) SignatureFormatCheck(sig sign.Signature) (bool, error) { panic(withFeature("BLS signature")) } @@ -54,11 +57,11 @@ func NewExpandMsgXOFKMAC128(domainTag string) hash.Hasher { panic(withFeature("BLS hasher")) } -func IsBLSSignatureIdentity(s Signature) bool { +func IsBLSSignatureIdentity(s sign.Signature) bool { panic(withFeature("BLS signature")) } -func BLSInvalidSignature() Signature { +func BLSInvalidSignature() sign.Signature { panic(withFeature("BLS signature")) } @@ -67,11 +70,11 @@ func isG2Compressed() bool { } func NewBLSThresholdSignatureParticipant( - groupPublicKey PublicKey, - sharePublicKeys []PublicKey, + groupPublicKey sign.PublicKey, + sharePublicKeys []sign.PublicKey, threshold int, myIndex int, - myPrivateKey PrivateKey, + myPrivateKey sign.PrivateKey, message []byte, dsTag string, ) (ThresholdSignatureParticipant, error) { @@ -79,8 +82,8 @@ func NewBLSThresholdSignatureParticipant( } func NewBLSThresholdSignatureInspector( - groupPublicKey PublicKey, - sharePublicKeys []PublicKey, + groupPublicKey sign.PublicKey, + sharePublicKeys []sign.PublicKey, threshold int, message []byte, dsTag string, @@ -89,7 +92,7 @@ func NewBLSThresholdSignatureInspector( } func BLSReconstructThresholdSignature(size int, threshold int, - shares []Signature, signers []int) (Signature, error) { + shares []sign.Signature, signers []int) (sign.Signature, error) { _ = duplicatedSignerErrorf("") _ = notEnoughSharesErrorf("") panic(withFeature("BLS threshold signature")) @@ -99,8 +102,8 @@ func EnoughShares(threshold int, sharesNumber int) (bool, error) { panic(withFeature("BLS threshold signature")) } -func BLSThresholdKeyGen(size int, threshold int, seed []byte) ([]PrivateKey, - []PublicKey, PublicKey, error) { +func BLSThresholdKeyGen(size int, threshold int, seed []byte) ([]sign.PrivateKey, + []sign.PublicKey, sign.PublicKey, error) { panic(withFeature("BLS threshold signature")) } @@ -124,60 +127,60 @@ func NewJointFeldman(size int, threshold int, myIndex int, panic(withFeature("BLS-DKG")) } -func SPOCKProve(sk PrivateKey, data []byte, kmac hash.Hasher) (Signature, error) { +func SPOCKProve(sk sign.PrivateKey, data []byte, kmac hash.Hasher) (sign.Signature, error) { panic(withFeature("BLS-SPoCK")) } -func SPOCKVerifyAgainstData(pk PublicKey, proof Signature, data []byte, kmac hash.Hasher) (bool, error) { +func SPOCKVerifyAgainstData(pk sign.PublicKey, proof sign.Signature, data []byte, kmac hash.Hasher) (bool, error) { panic(withFeature("BLS-SPoCK")) } -func SPOCKVerify(pk1 PublicKey, proof1 Signature, pk2 PublicKey, proof2 Signature) (bool, error) { +func SPOCKVerify(pk1 sign.PublicKey, proof1 sign.Signature, pk2 sign.PublicKey, proof2 sign.Signature) (bool, error) { panic(withFeature("BLS-SPoCK")) } -func BLSGeneratePOP(sk PrivateKey) (Signature, error) { +func BLSGeneratePOP(sk sign.PrivateKey) (sign.Signature, error) { panic(withFeature("BLS multi-sig")) } -func BLSVerifyPOP(pk PublicKey, s Signature) (bool, error) { +func BLSVerifyPOP(pk sign.PublicKey, s sign.Signature) (bool, error) { panic(withFeature("BLS multi-sig")) } -func AggregateBLSSignatures(sigs []Signature) (Signature, error) { +func AggregateBLSSignatures(sigs []sign.Signature) (sign.Signature, error) { panic(withFeature("BLS multi-sig")) } -func AggregateBLSPrivateKeys(keys []PrivateKey) (PrivateKey, error) { +func AggregateBLSPrivateKeys(keys []sign.PrivateKey) (sign.PrivateKey, error) { panic(withFeature("BLS multi-sig")) } -func AggregateBLSPublicKeys(keys []PublicKey) (PublicKey, error) { +func AggregateBLSPublicKeys(keys []sign.PublicKey) (sign.PublicKey, error) { panic(withFeature("BLS multi-sig")) } -func IdentityBLSPublicKey() PublicKey { +func IdentityBLSPublicKey() sign.PublicKey { panic(withFeature("BLS multi-sig")) } -func RemoveBLSPublicKeys(aggKey PublicKey, keysToRemove []PublicKey) (PublicKey, error) { +func RemoveBLSPublicKeys(aggKey sign.PublicKey, keysToRemove []sign.PublicKey) (sign.PublicKey, error) { panic(withFeature("BLS multi-sig")) } func VerifyBLSSignatureOneMessage( - pks []PublicKey, s Signature, message []byte, kmac hash.Hasher, + pks []sign.PublicKey, s sign.Signature, message []byte, kmac hash.Hasher, ) (bool, error) { panic(withFeature("BLS multi-sig")) } func VerifyBLSSignatureManyMessages( - pks []PublicKey, s Signature, messages [][]byte, kmac []hash.Hasher, + pks []sign.PublicKey, s sign.Signature, messages [][]byte, kmac []hash.Hasher, ) (bool, error) { panic(withFeature("BLS multi-sig")) } func BatchVerifyBLSSignaturesOneMessage( - pks []PublicKey, sigs []Signature, message []byte, kmac hash.Hasher, + pks []sign.PublicKey, sigs []sign.Signature, message []byte, kmac hash.Hasher, ) ([]bool, error) { panic(withFeature("BLS multi-sig")) } diff --git a/_tmp/no_cgo_test.go b/_tmp/no_cgo_test.go new file mode 100644 index 00000000..2383a2da --- /dev/null +++ b/_tmp/no_cgo_test.go @@ -0,0 +1,49 @@ +//go:build !cgo && no_cgo +// +build !cgo,no_cgo + +package crypto_test + +import ( + "testing" + + "github.com/onflow/crypto" + "github.com/onflow/crypto/sign" + "github.com/onflow/crypto/sign/bls" + "github.com/stretchr/testify/assert" +) + +// Test all public functions requiring cgo. +// These functions must panic if built without cgo. +func TestNoRelicPanic(t *testing.T) { + assert.Panics(t, func() { _, _ = sign.GeneratePrivateKey(sign.BLSBLS12381, nil) }) + assert.Panics(t, func() { _, _ = sign.DecodePrivateKey(sign.BLSBLS12381, nil) }) + assert.Panics(t, func() { _, _ = sign.DecodePublicKey(sign.BLSBLS12381, nil) }) + assert.Panics(t, func() { _, _ = sign.DecodePublicKeyCompressed(sign.BLSBLS12381, nil) }) + assert.Panics(t, func() { _ = bls.NewExpandMsgXOFKMAC128("") }) + assert.Panics(t, func() { _ = bls.BLSInvalidSignature() }) + assert.Panics(t, func() { _, _ = bls.BLSGeneratePOP(nil) }) + assert.Panics(t, func() { _, _ = bls.BLSVerifyPOP(nil, nil) }) + assert.Panics(t, func() { _, _ = bls.AggregateBLSSignatures(nil) }) + assert.Panics(t, func() { _, _ = bls.AggregateBLSPrivateKeys(nil) }) + assert.Panics(t, func() { _, _ = bls.AggregateBLSPublicKeys(nil) }) + assert.Panics(t, func() { _ = bls.IdentityBLSPublicKey() }) + assert.Panics(t, func() { _ = bls.IsBLSAggregateEmptyListError(nil) }) + assert.Panics(t, func() { _ = bls.IsInvalidSignatureError(nil) }) + assert.Panics(t, func() { _ = bls.IsNotBLSKeyError(nil) }) + assert.Panics(t, func() { _ = bls.IsBLSSignatureIdentity(nil) }) + assert.Panics(t, func() { _, _ = bls.RemoveBLSPublicKeys(nil, nil) }) + assert.Panics(t, func() { _, _ = bls.VerifyBLSSignatureOneMessage(nil, nil, nil, nil) }) + assert.Panics(t, func() { _, _ = bls.VerifyBLSSignatureManyMessages(nil, nil, nil, nil) }) + assert.Panics(t, func() { _, _ = bls.BatchVerifyBLSSignaturesOneMessage(nil, nil, nil, nil) }) + assert.Panics(t, func() { _, _ = crypto.SPOCKProve(nil, nil, nil) }) + assert.Panics(t, func() { _, _ = crypto.SPOCKVerify(nil, nil, nil, nil) }) + assert.Panics(t, func() { _, _ = crypto.SPOCKVerifyAgainstData(nil, nil, nil, nil) }) + assert.Panics(t, func() { _, _ = crypto.NewBLSThresholdSignatureParticipant(nil, nil, 0, 0, nil, nil, "") }) + assert.Panics(t, func() { _, _ = crypto.NewBLSThresholdSignatureInspector(nil, nil, 0, nil, "") }) + assert.Panics(t, func() { _, _ = crypto.BLSReconstructThresholdSignature(0, 0, nil, nil) }) + assert.Panics(t, func() { _, _ = crypto.EnoughShares(0, 0) }) + assert.Panics(t, func() { _, _, _, _ = crypto.BLSThresholdKeyGen(0, 0, nil) }) + assert.Panics(t, func() { _, _ = crypto.NewFeldmanVSS(0, 0, 0, nil, 0) }) + assert.Panics(t, func() { _, _ = crypto.NewFeldmanVSSQual(0, 0, 0, nil, 0) }) + assert.Panics(t, func() { _, _ = crypto.NewJointFeldman(0, 0, 0, nil) }) +} diff --git a/spock.go b/_tmp/spock.go similarity index 89% rename from spock.go rename to _tmp/spock.go index c2c2e493..934ab2ad 100644 --- a/spock.go +++ b/_tmp/spock.go @@ -30,6 +30,7 @@ import ( "fmt" "github.com/onflow/crypto/hash" + "github.com/onflow/crypto/sign" ) // SPOCKProve generates a spock poof for data under the private key sk. @@ -40,8 +41,8 @@ import ( // - (nil, errNotBLSKey) if input key is not a BLS key // - (nil, error) if an unexpected error occurs // - (proof, nil) otherwise -func SPOCKProve(sk PrivateKey, data []byte, kmac hash.Hasher) (Signature, error) { - if sk.Algorithm() != BLSBLS12381 { +func SPOCKProve(sk sign.PrivateKey, data []byte, kmac hash.Hasher) (sign.Signature, error) { + if sk.Algorithm() != sign.BLSBLS12381 { return nil, errNotBLSKey } @@ -61,8 +62,8 @@ func SPOCKProve(sk PrivateKey, data []byte, kmac hash.Hasher) (Signature, error) // - (false, invalidHasherSiseError) if hasher's output size is not 128 bytes // - (false, error) if an unexpected error occurs // - (validity, nil) otherwise -func SPOCKVerifyAgainstData(pk PublicKey, proof Signature, data []byte, kmac hash.Hasher) (bool, error) { - if pk.Algorithm() != BLSBLS12381 { +func SPOCKVerifyAgainstData(pk sign.PublicKey, proof sign.Signature, data []byte, kmac hash.Hasher) (bool, error) { + if pk.Algorithm() != sign.BLSBLS12381 { return false, errNotBLSKey } // BLS verification of data @@ -87,7 +88,7 @@ func SPOCKVerifyAgainstData(pk PublicKey, proof Signature, data []byte, kmac has // - (false, errNotBLSKey) if at least one key is not a BLS key. // - (false, error) if an unexpected error occurs. // - (validity, nil) otherwise -func SPOCKVerify(pk1 PublicKey, proof1 Signature, pk2 PublicKey, proof2 Signature) (bool, error) { +func SPOCKVerify(pk1 sign.PublicKey, proof1 sign.Signature, pk2 sign.PublicKey, proof2 sign.Signature) (bool, error) { blsPk1, ok1 := pk1.(*pubKeyBLSBLS12381) blsPk2, ok2 := pk2.(*pubKeyBLSBLS12381) if !ok1 || !ok2 { diff --git a/spock_test.go b/_tmp/spock_test.go similarity index 94% rename from spock_test.go rename to _tmp/spock_test.go index 16539589..2618cf77 100644 --- a/spock_test.go +++ b/_tmp/spock_test.go @@ -27,6 +27,8 @@ import ( "github.com/stretchr/testify/assert" "github.com/stretchr/testify/require" + + "github.com/onflow/crypto/sign" ) func TestSPOCKProveVerifyAgainstData(t *testing.T) { @@ -37,7 +39,7 @@ func TestSPOCKProveVerifyAgainstData(t *testing.T) { n, err := crand.Read(seed) require.Equal(t, n, KeyGenSeedMinLen) require.NoError(t, err) - sk, err := GeneratePrivateKey(BLSBLS12381, seed) + sk, err := sign.GeneratePrivateKey(sign.BLSBLS12381, seed) require.NoError(t, err) _, err = crand.Read(data) require.NoError(t, err) @@ -69,7 +71,7 @@ func TestSPOCKProveVerifyAgainstData(t *testing.T) { // test with a valid but different key (unhappy path) t.Run("invalid key", func(t *testing.T) { seed[0] ^= 1 - wrongSk, err := GeneratePrivateKey(BLSBLS12381, seed) + wrongSk, err := sign.GeneratePrivateKey(sign.BLSBLS12381, seed) require.NoError(t, err) result, err := SPOCKVerifyAgainstData(wrongSk.PublicKey(), s, data, kmac) require.NoError(t, err) @@ -111,13 +113,13 @@ func TestSPOCKProveVerify(t *testing.T) { n, err := crand.Read(seed1) require.Equal(t, n, KeyGenSeedMinLen) require.NoError(t, err) - sk1, err := GeneratePrivateKey(BLSBLS12381, seed1) + sk1, err := sign.GeneratePrivateKey(sign.BLSBLS12381, seed1) require.NoError(t, err) // sk2 n, err = crand.Read(seed2) require.Equal(t, n, KeyGenSeedMinLen) require.NoError(t, err) - sk2, err := GeneratePrivateKey(BLSBLS12381, seed2) + sk2, err := sign.GeneratePrivateKey(sign.BLSBLS12381, seed2) require.NoError(t, err) // generate SPoCK proofs @@ -154,7 +156,7 @@ func TestSPOCKProveVerify(t *testing.T) { // matching the private keys used to generate the proofs. t.Run("invalid public key", func(t *testing.T) { seed2[0] ^= 1 // alter the seed - sk2bis, err := GeneratePrivateKey(BLSBLS12381, seed2) + sk2bis, err := sign.GeneratePrivateKey(sign.BLSBLS12381, seed2) require.NoError(t, err) result, err := SPOCKVerify(sk1.PublicKey(), pr1, sk2bis.PublicKey(), pr2) require.NoError(t, err) diff --git a/thresholdsign.go b/_tmp/thresholdsign.go similarity index 96% rename from thresholdsign.go rename to _tmp/thresholdsign.go index fef64f01..cfad1e9f 100644 --- a/thresholdsign.go +++ b/_tmp/thresholdsign.go @@ -21,6 +21,8 @@ package crypto import ( "errors" "fmt" + + "github.com/onflow/crypto/sign" ) // A threshold signature scheme allows a group of participants @@ -85,7 +87,7 @@ type ThresholdSignatureInspector interface { // - (false, nil): if `index` is valid but the signature share is invalid // - (false, InvalidInputsError): if `index` is an invalid index value // - (false, error): for all other unexpected errors - VerifyShare(index int, share Signature) (bool, error) + VerifyShare(index int, share sign.Signature) (bool, error) // VerifyThresholdSignature verifies the input signature against the stored // message and stored group public key. It does not update the internal state. @@ -95,7 +97,7 @@ type ThresholdSignatureInspector interface { // - (true, nil): if the signature is valid // - (false, nil): if the signature is invalid // - (false, error): for all other unexpected errors - VerifyThresholdSignature(thresholdSignature Signature) (bool, error) + VerifyThresholdSignature(thresholdSignature sign.Signature) (bool, error) // EnoughShares indicates whether enough shares have been accumulated to reconstruct // a group signature. This function is thread-safe and locks the internal state. @@ -120,7 +122,7 @@ type ThresholdSignatureInspector interface { // - (false, nil): if not enough shares were collected and no error occurred // - (false, InvalidInputsError): if index is invalid // - (false, duplicatedSignerError): if a signature for the index was previously added - TrustedAdd(index int, share Signature) (bool, error) + TrustedAdd(index int, share sign.Signature) (bool, error) // VerifyAndAdd verifies a signature share (same as `VerifyShare`), // and attempts to add the share to the local pool of shares. @@ -137,7 +139,7 @@ type ThresholdSignatureInspector interface { // public key is not considered an invalid input. // - duplicatedSignerError: if signer was already added. // - other errors: if an unexpected exception occurred. - VerifyAndAdd(index int, share Signature) (bool, bool, error) + VerifyAndAdd(index int, share sign.Signature) (bool, bool, error) // HasShare checks whether the internal map contains the share of the given index. // This function is thread-safe. @@ -160,7 +162,7 @@ type ThresholdSignatureInspector interface { // - (nil, invalidInputsError): if the constructed signature failed to verify against the group public key and stored message. // This post-verification is required for safety, as `TrustedAdd` allows adding invalid signatures. // - (nil, error): for any other unexpected error - ThresholdSignature() (Signature, error) + ThresholdSignature() (sign.Signature, error) } // ThresholdSignatureParticipant is a participant in a threshold signature protocol. @@ -174,7 +176,7 @@ type ThresholdSignatureParticipant interface { // not update the internal state. // This function is thread-safe. // No error is expected unless an unexpected exception occurs. - SignShare() (Signature, error) + SignShare() (sign.Signature, error) } // duplicatedSignerError is an error returned when TrustedAdd or VerifyAndAdd encounter diff --git a/common.go b/common.go deleted file mode 100644 index 960b2085..00000000 --- a/common.go +++ /dev/null @@ -1,112 +0,0 @@ -/* - * Flow Crypto - * - * Copyright Flow Foundation. - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -package crypto - -import ( - "crypto/rand" - "errors" - "fmt" -) - -//revive:disable:var-naming - -const ( - // Minimum targeted bits of security. - // This is used as a reference but it doesn't mean all implemented primitives provide this minimum. - securityBits = 128 - - // keygen seed length conditions - // enforce seed to be at least double the security bits and have enough entropy. - // it is still recommened that seed is generated using a secure RNG. - KeyGenSeedMinLen = 2 * (securityBits / 8) - KeyGenSeedMaxLen = 256 -) - -// TODO: update this code to make sure -// the function isn't removed by the compiler -// https://github.com/golang/go/issues/21865 -func overwrite(data []byte) { - _, err := rand.Read(data) // checking err is enough - if err != nil { - // zero the buffer if randomizing failed - for i := 0; i < len(data); i++ { - data[i] = 0 - } - } -} - -// invalidInputsError is an error returned when a crypto API receives invalid inputs. -// It allows a function caller differentiate unexpected program errors from errors caused by -// invalid inputs. -type invalidInputsError struct { - error -} - -func (e invalidInputsError) Unwrap() error { - return e.error -} - -// invalidInputsErrorf constructs a new invalidInputsError -func invalidInputsErrorf(msg string, args ...interface{}) error { - return &invalidInputsError{ - error: fmt.Errorf(msg, args...), - } -} - -// IsInvalidInputsError checks if the input error is of an invalidInputsError type -// invalidInputsError is returned when the API is provided invalid inputs. -// Some specific errors are assigned specific sentinel errors for a simpler error check -// while the remaining input errors trigger an invalidInputsError. -func IsInvalidInputsError(err error) bool { - var target *invalidInputsError - return errors.As(err, &target) -} - -var errNilHasher = errors.New("hasher cannot be nil") - -// IsNilHasherError checks if the input error wraps the internal errNilHasher, -// which is returned when a nil hasher is used. -func IsNilHasherError(err error) bool { - return errors.Is(err, errNilHasher) -} - -// invalidHasherSizeError is an error returned when a crypto API is called with a hasher -// with an output size not suited with the cryptographic operation. -type invalidHasherSizeError struct { - error -} - -func (e invalidHasherSizeError) Unwrap() error { - return e.error -} - -// invalidHasherSizeErrorf constructs a new invalidHasherSizeError -func invalidHasherSizeErrorf(msg string, args ...interface{}) error { - return &invalidHasherSizeError{ - error: fmt.Errorf(msg, args...), - } -} - -// IsInvalidHasherSizeError checks if the input error is of an invalidHasherSizeError type. -// invalidHasherSizeError is an error returned when a crypto API is called with a hasher -// with an output size not suited with the cryptographic operation. -func IsInvalidHasherSizeError(err error) bool { - var target *invalidHasherSizeError - return errors.As(err, &target) -} diff --git a/common/common.go b/common/common.go new file mode 100644 index 00000000..9ed54263 --- /dev/null +++ b/common/common.go @@ -0,0 +1,57 @@ +/* + * Flow Crypto + * + * Copyright Flow Foundation. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package common + +import ( + "errors" + + "github.com/onflow/crypto/internal" +) + +// IsInvalidInputsError checks if the input error is of an invalidInputsError type +// invalidInputsError is returned when the API is provided invalid inputs. +// Some specific errors are assigned specific sentinel errors for a simpler error check +// while the remaining input errors trigger an invalidInputsError. +func IsInvalidInputsError(err error) bool { + var target *internal.InvalidInputsError + return errors.As(err, &target) +} + +// InvalidInputsErrorf constructs a new invalidInputsError +var InvalidInputsErrorf = internal.InvalidInputsErrorf + +// IsNilHasherError checks if the input error wraps the internal errNilHasher, +// which is returned when a nil hasher is used. +func IsNilHasherError(err error) bool { + return errors.Is(err, ErrNilHasher) +} + +// ErrNilHasher is returned when a nil hasher is used +var ErrNilHasher = internal.ErrNilHasher + +// IsInvalidHasherSizeError checks if the input error is of an invalidHasherSizeError type. +// invalidHasherSizeError is an error returned when a crypto API is called with a hasher +// with an output size not suited with the cryptographic operation. +func IsInvalidHasherSizeError(err error) bool { + var target *internal.InvalidHasherSizeError + return errors.As(err, &target) +} + +// InvalidHasherSizeErrorf constructs a new invalidHasherSizeError +var InvalidHasherSizeErrorf = internal.InvalidHasherSizeErrorf diff --git a/go.mod b/go.mod index e36c0d17..0d7c195f 100644 --- a/go.mod +++ b/go.mod @@ -4,7 +4,6 @@ go 1.24.1 require ( github.com/btcsuite/btcd/btcec/v2 v2.3.4 - github.com/sirupsen/logrus v1.9.3 github.com/stretchr/testify v1.10.0 golang.org/x/crypto v0.36.0 gonum.org/v1/gonum v0.16.0 diff --git a/go.sum b/go.sum index 16ac77ab..708f77cb 100644 --- a/go.sum +++ b/go.sum @@ -1,6 +1,5 @@ github.com/btcsuite/btcd/btcec/v2 v2.3.4 h1:3EJjcN70HCu/mwqlUsGK8GcNVyLVxFDlWurTXGPFfiQ= github.com/btcsuite/btcd/btcec/v2 v2.3.4/go.mod h1:zYzJ8etWJQIv1Ogk7OzpWjowwOdXY1W/17j2MW85J04= -github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= github.com/decred/dcrd/crypto/blake256 v1.0.0/go.mod h1:sQl2p6Y26YV+ZOcSTP6thNdn47hh8kt6rqSlvmrXFAc= @@ -13,15 +12,10 @@ github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE= github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI= github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM= github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4= -github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ= -github.com/sirupsen/logrus v1.9.3/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ= -github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME= -github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg= github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA= github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY= golang.org/x/crypto v0.36.0 h1:AnAEvhDddvBdpY+uR+MyHmuZzzNqXSe/GvuDeob5L34= golang.org/x/crypto v0.36.0/go.mod h1:Y4J0ReaxCR1IMaabaSMugxJES1EpwhBHhv2bDHklZvc= -golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= golang.org/x/sys v0.31.0 h1:ioabZlmFYtWhL+TRYpcnNlLwhyxaM9kWTDEmfnprqik= golang.org/x/sys v0.31.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k= gonum.org/v1/gonum v0.16.0 h1:5+ul4Swaf3ESvrOnidPp4GZbzf0mxVQpDCYUQE7OJfk= @@ -29,7 +23,6 @@ gonum.org/v1/gonum v0.16.0/go.mod h1:fef3am4MQ93R2HHpKnLk4/Tbh/s0+wqD5nfa6Pnwy4E gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo= gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= -gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA= gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= pgregory.net/rapid v0.4.7 h1:MTNRktPuv5FNqOO151TM9mDTa+XHcX6ypYeISDVD14g= diff --git a/hash/types.go b/hash/types.go index fbc64c03..66e2943c 100644 --- a/hash/types.go +++ b/hash/types.go @@ -18,6 +18,8 @@ package hash +import "github.com/onflow/crypto/internal" + //revive:disable:var-naming // HashingAlgorithm is an identifier for a hashing algorithm. @@ -52,7 +54,7 @@ func (h HashingAlgorithm) String() string { const ( // minimum targeted bits of security - securityBits = 128 + securityBits = internal.SecurityBits // Lengths of hash outputs in bytes HashLenSHA2_256 = 32 diff --git a/bls12381_utils.c b/internal/bls12381/bls12381_utils.c similarity index 99% rename from bls12381_utils.c rename to internal/bls12381/bls12381_utils.c index 20a58c5f..8858f47e 100644 --- a/bls12381_utils.c +++ b/internal/bls12381/bls12381_utils.c @@ -22,7 +22,6 @@ #include "bls12381_utils.h" #include "assert.h" -#include "bls_include.h" // compile all blst C src along with this file #include "blst_src.c" diff --git a/bls12381_utils.go b/internal/bls12381/bls12381_utils.go similarity index 68% rename from bls12381_utils.go rename to internal/bls12381/bls12381_utils.go index 50177061..b407aa3e 100644 --- a/bls12381_utils.go +++ b/internal/bls12381/bls12381_utils.go @@ -64,13 +64,14 @@ import ( "errors" "fmt" + "github.com/onflow/crypto/internal" "github.com/onflow/crypto/random" ) // Go wrappers around BLST C types -type pointE1 C.E1 -type pointE2 C.E2 -type scalar C.Fr +type PointE1 C.E1 +type PointE2 C.E2 +type Scalar C.Fr // Note that scalars and field elements F_r are represented in Go by the same type // called `scalar`, which is internally represented by C type `Fr`. Scalars used by the @@ -78,69 +79,72 @@ type scalar C.Fr const ( // BLS12-381 related lengths imported from the C layer - frBytesLen = int(C.Fr_BYTES) - fpBytesLen = int(C.Fp_BYTES) - g1BytesLen = int(C.G1_SER_BYTES) - g2BytesLen = int(C.G2_SER_BYTES) + FrBytesLen = int(C.Fr_BYTES) + FpBytesLen = int(C.Fp_BYTES) + G1BytesLen = int(C.G1_SER_BYTES) + G2BytesLen = int(C.G2_SER_BYTES) // error constants imported from the C layer - valid = C.VALID - invalid = C.INVALID - badEncoding = C.BAD_ENCODING - badValue = C.BAD_VALUE - pointNotOnCurve = C.POINT_NOT_ON_CURVE + Valid = C.VALID + Invalid = C.INVALID + BadEncoding = C.BAD_ENCODING + BadValue = C.BAD_VALUE + PointNotOnCurve = C.POINT_NOT_ON_CURVE + + // expandMsgOutput is the output length of the expand_message step as required by the + // hash_to_curve algorithm (and the map to G1 step). + ExpandMsgOutput = int(C.MAP_TO_G1_INPUT_LEN) ) +var BLS12381Order = []byte{0x73, 0xED, 0xA7, 0x53, 0x29, 0x9D, 0x7D, 0x48, 0x33, 0x39, + 0xD8, 0x08, 0x09, 0xA1, 0xD8, 0x05, 0x53, 0xBD, 0xA4, 0x02, 0xFF, 0xFE, + 0x5B, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x01} + // header of the point at infinity serializations var g1SerHeader byte // g1 (G1 identity) var g2SerHeader byte // g2 (G2 identity) // `g1` serialization -var g1Serialization []byte - -var g2PublicKey pubKeyBLSBLS12381 +var G1Serialization []byte // initialization of BLS12-381 curve -func initBLS12381() { +func init() { C.types_sanity() - if isG1Compressed() { + if IsG1Compressed() { g1SerHeader = 0xC0 } else { g1SerHeader = 0x40 } - g1Serialization = append([]byte{g1SerHeader}, make([]byte, g1BytesLen-1)...) - if isG2Compressed() { + G1Serialization = append([]byte{g1SerHeader}, make([]byte, G1BytesLen-1)...) + if IsG2Compressed() { g2SerHeader = 0xC0 } else { g2SerHeader = 0x40 } - // set a global point to infinity - C.E2_set_infty((*C.E2)(&g2PublicKey.point)) - g2PublicKey.isIdentity = true } // String returns a hex-encoded representation of the scalar. -func (a *scalar) String() string { - encoding := make([]byte, frBytesLen) - writeScalar(encoding, a) +func (a *Scalar) String() string { + encoding := make([]byte, FrBytesLen) + WriteScalar(encoding, a) return fmt.Sprintf("%#x", encoding) } // String returns a hex-encoded representation of the E2 point. -func (p *pointE2) String() string { - encoding := make([]byte, g2BytesLen) - writePointE2(encoding, p) +func (p *PointE2) String() string { + encoding := make([]byte, G2BytesLen) + WritePointE2(encoding, p) return fmt.Sprintf("%#x", encoding) } // Scalar multiplication of a generic point `p` in E1 -func (p *pointE1) scalarMultE1(res *pointE1, expo *scalar) { +func (p *PointE1) ScalarMultE1(res *PointE1, expo *Scalar) { C.E1_mult((*C.E1)(res), (*C.E1)(p), (*C.Fr)(expo)) } // Scalar multiplication of generator g1 in G1 -func generatorScalarMultG1(res *pointE1, expo *scalar) { +func GeneratorScalarMultG1(res *PointE1, expo *Scalar) { C.G1_mult_gen((*C.E1)(res), (*C.Fr)(expo)) } @@ -150,63 +154,68 @@ func generatorScalarMultG1(res *pointE1, expo *scalar) { // multiple pairing computation. Therefore, convert the // resulting point to affine coordinate to save pre-pairing // conversions. -func generatorScalarMultG2(res *pointE2, expo *scalar) { +func GeneratorScalarMultG2(res *PointE2, expo *Scalar) { C.G2_mult_gen_to_affine((*C.E2)(res), (*C.Fr)(expo)) } // comparison in F_r where r is the group order of G1/G2 // (both scalars should be reduced mod r) -func (x *scalar) equals(other *scalar) bool { +func (x *Scalar) Equals(other *Scalar) bool { return bool(C.Fr_is_equal((*C.Fr)(x), (*C.Fr)(other))) } // comparison in E1 -func (p *pointE1) equals(other *pointE1) bool { +func (p *PointE1) Equals(other *PointE1) bool { return bool(C.E1_is_equal((*C.E1)(p), (*C.E1)(other))) } // comparison in E2 -func (p *pointE2) equals(other *pointE2) bool { +func (p *PointE2) Equals(other *PointE2) bool { return bool(C.E2_is_equal((*C.E2)(p), (*C.E2)(other))) } // Comparison to zero in F_r. // Scalar must be already reduced modulo r -func (x *scalar) isZero() bool { +func (x *Scalar) IsZero() bool { return bool(C.Fr_is_zero((*C.Fr)(x))) } // Comparison to point at infinity in G2. -func (p *pointE2) isInfinity() bool { +func (p *PointE2) IsInfinity() bool { return bool(C.E2_is_infty((*C.E2)(p))) } +// Comparison to point at infinity in G2. +func (p *PointE2) SetInfinity() { + C.E2_set_infty((*C.E2)(p)) +} + // generates a random element in F_r using input random source, // and saves the random in `x`. // returns `true` if generated element is zero. -func randFr(x *scalar, rand random.Rand) bool { +func RandFr(x *Scalar, rand random.Rand) bool { // use extra 128 bits to reduce the modular reduction bias - bytes := make([]byte, frBytesLen+securityBits/8) + bytes := make([]byte, FrBytesLen+internal.SecurityBits/8) rand.Read(bytes) // modular reduction - return mapToFr(x, bytes) + return MapToFr(x, bytes) } // generates a random element in F_r* using input random source, // and saves the random in `x`. -func randFrStar(x *scalar, rand random.Rand) { +func RandFrStar(x *Scalar, rand random.Rand) { isZero := true // extremely unlikely this loop runs more than once, // but force the output to be non-zero instead of propagating an error. for isZero { - isZero = randFr(x, rand) + isZero = RandFr(x, rand) } } // mapToFr reads a scalar from a slice of bytes and maps it to Fr using modular reduction. // The resulting element `k` therefore satisfies 0 <= k < r. // It returns true if scalar is zero and false otherwise. -func mapToFr(x *scalar, src []byte) bool { +func MapToFr(x *Scalar, src []byte) bool { isZero := C.map_bytes_to_Fr((*C.Fr)(x), (*C.uchar)(&src[0]), (C.int)(len(src))) @@ -214,42 +223,58 @@ func mapToFr(x *scalar, src []byte) bool { } // writeScalar writes a scalar in a slice of bytes -func writeScalar(dest []byte, x *scalar) { +func WriteScalar(dest []byte, x *Scalar) { C.Fr_write_bytes((*C.uchar)(&dest[0]), (*C.Fr)(x)) } +// encode returns a byte encoding of the scalar. +// The encoding is a raw encoding in big endian padded to the group order +func (x *Scalar) Encode() []byte { + dest := make([]byte, FrBytesLen) + WriteScalar(dest, x) + return dest +} + // writePointE2 writes a G2 point in a slice of bytes // The slice should be of size g2BytesLen and the serialization // follows the Zcash format specified in draft-irtf-cfrg-pairing-friendly-curves -func writePointE2(dest []byte, a *pointE2) { +func WritePointE2(dest []byte, a *PointE2) { C.E2_write_bytes((*C.uchar)(&dest[0]), (*C.E2)(a)) } +// encode returns a byte encoding of the scalar. +// The encoding is a raw encoding in big endian padded to the group order +func (a *PointE2) Encode() []byte { + dest := make([]byte, G2BytesLen) + WritePointE2(dest, a) + return dest +} + // writePointE1 writes a G1 point in a slice of bytes // The slice should be of size g1BytesLen and the serialization // follows the Zcash format specified in draft-irtf-cfrg-pairing-friendly-curves -func writePointE1(dest []byte, a *pointE1) { +func WritePointE1(dest []byte, a *PointE1) { C.E1_write_bytes((*C.uchar)(&dest[0]), (*C.E1)(a)) } // read an F_r* element from a byte slice // and stores it into a `scalar` type element. -func readScalarFrStar(a *scalar, src []byte) error { +func ReadScalarFrStar(a *Scalar, src []byte) error { read := C.Fr_star_read_bytes( (*C.Fr)(a), (*C.uchar)(&src[0]), (C.int)(len(src))) switch read { - case valid: + case Valid: return nil - case badEncoding: - return invalidInputsErrorf("input length must be %d, got %d", - frBytesLen, len(src)) - case badValue: - return invalidInputsErrorf("scalar is not in the correct range") + case BadEncoding: + return internal.InvalidInputsErrorf("input length must be %d, got %d", + FrBytesLen, len(src)) + case BadValue: + return internal.InvalidInputsErrorf("scalar is not in the correct range") default: - return invalidInputsErrorf("reading the scalar failed") + return internal.InvalidInputsErrorf("reading the scalar failed") } } @@ -257,18 +282,18 @@ func readScalarFrStar(a *scalar, src []byte) error { // The slice is expected to be of size g2BytesLen and the deserialization // follows the Zcash format specified in draft-irtf-cfrg-pairing-friendly-curves. // No G2 membership check is performed. -func readPointE2(a *pointE2, src []byte) error { +func ReadPointE2(a *PointE2, src []byte) error { read := C.E2_read_bytes((*C.E2)(a), (*C.uchar)(&src[0]), (C.int)(len(src))) switch read { - case valid: + case Valid: return nil - case badEncoding, badValue: - return invalidInputsErrorf("input could not deserialize to an E2 point") - case pointNotOnCurve: - return invalidInputsErrorf("input is not a point on curve E2") + case BadEncoding, BadValue: + return internal.InvalidInputsErrorf("input could not deserialize to an E2 point") + case PointNotOnCurve: + return internal.InvalidInputsErrorf("input is not a point on curve E2") default: return errors.New("reading E2 point failed") } @@ -278,41 +303,41 @@ func readPointE2(a *pointE2, src []byte) error { // The slice should be of size g1BytesLen and the deserialization // follows the Zcash format specified in draft-irtf-cfrg-pairing-friendly-curves. // No G1 membership check is performed. -func readPointE1(a *pointE1, src []byte) error { +func ReadPointE1(a *PointE1, src []byte) error { read := C.E1_read_bytes((*C.E1)(a), (*C.uchar)(&src[0]), (C.int)(len(src))) switch read { - case valid: + case Valid: return nil - case badEncoding, badValue: - return invalidInputsErrorf("input could not deserialize to a E1 point") - case pointNotOnCurve: - return invalidInputsErrorf("input is not a point on curve E1") + case BadEncoding, BadValue: + return internal.InvalidInputsErrorf("input could not deserialize to a E1 point") + case PointNotOnCurve: + return internal.InvalidInputsErrorf("input is not a point on curve E1") default: return errors.New("reading E1 point failed") } } -// checkMembershipG1 wraps a call to a subgroup check in G1 since cgo can't be used -// in go test files. -func checkMembershipG1(pt *pointE1) bool { +// CheckMembershipG1 checks if input E1 point is on the subgroup G1. +// It assumes input `p` is on E1. +func (pt *PointE1) CheckMembershipG1() bool { return bool(C.E1_in_G1((*C.E1)(pt))) } -// checkMembershipG2 wraps a call to a subgroup check in G2 since cgo can't be used -// in go test files. -func checkMembershipG2(pt *pointE2) bool { +// CheckMembershipG2 checks if input E2 point is on the subgroup G2. +// It assumes input `p` is on E2. +func (pt *PointE2) CheckMembershipG2() bool { return bool(C.E2_in_G2((*C.E2)(pt))) } // This is only a TEST/DEBUG/BENCH function. // It returns the hash-to-G1 point from a slice of 128 bytes -func mapToG1(data []byte) *pointE1 { +func MapToG1(data []byte) *PointE1 { l := len(data) - var h pointE1 - if C.map_to_G1((*C.E1)(&h), (*C.uchar)(&data[0]), (C.int)(l)) != valid { + var h PointE1 + if C.map_to_G1((*C.E1)(&h), (*C.uchar)(&data[0]), (C.int)(l)) != Valid { return nil } return &h @@ -321,26 +346,26 @@ func mapToG1(data []byte) *pointE1 { // mapToG1 is a test function, it wraps a call to C since cgo can't be used in go test files. // It maps input bytes to a point in G2 and stores it in input point. // THIS IS NOT the kind of mapping function that is used in BLS signature. -func unsafeMapToG1(pt *pointE1, seed []byte) { +func unsafeMapToG1(pt *PointE1, seed []byte) { C.unsafe_map_bytes_to_G1((*C.E1)(pt), (*C.uchar)(&seed[0]), (C.int)(len(seed))) } // unsafeMapToG1Complement is a test function, it wraps a call to C since cgo can't be used in go test files. // It generates a random point in E2\G2 and stores it in input point. -func unsafeMapToG1Complement(pt *pointE1, seed []byte) { +func UnsafeMapToG1Complement(pt *PointE1, seed []byte) { C.unsafe_map_bytes_to_G1complement((*C.E1)(pt), (*C.uchar)(&seed[0]), (C.int)(len(seed))) } // unsafeMapToG2 is a test function, it wraps a call to C since cgo can't be used in go test files. // It maps input bytes to a point in G2 and stores it in input point. // THIS IS NOT the kind of mapping function that is used in BLS signature. -func unsafeMapToG2(pt *pointE2, seed []byte) { +func unsafeMapToG2(pt *PointE2, seed []byte) { C.unsafe_map_bytes_to_G2((*C.E2)(pt), (*C.uchar)(&seed[0]), (C.int)(len(seed))) } // unsafeMapToG2Complement is a test function, it wraps a call to C since cgo can't be used in go test files. // It generates a random point in E2\G2 and stores it in input point. -func unsafeMapToG2Complement(pt *pointE2, seed []byte) { +func unsafeMapToG2Complement(pt *PointE2, seed []byte) { C.unsafe_map_bytes_to_G2complement((*C.E2)(pt), (*C.uchar)(&seed[0]), (C.int)(len(seed))) } @@ -348,7 +373,7 @@ func unsafeMapToG2Complement(pt *pointE2, seed []byte) { // It hashes `data` to a G1 point using the tag `dst` and returns the G1 point serialization. // The function uses xmd with SHA256 in the hash-to-field. func hashToG1Bytes(data, dst []byte) []byte { - hash := make([]byte, expandMsgOutput) + hash := make([]byte, ExpandMsgOutput) inputLength := len(data) if len(data) == 0 { @@ -357,49 +382,49 @@ func hashToG1Bytes(data, dst []byte) []byte { // XMD using SHA256 C.xmd_sha256((*C.uchar)(&hash[0]), - (C.int)(expandMsgOutput), + (C.int)(ExpandMsgOutput), (*C.uchar)(&data[0]), (C.int)(inputLength), (*C.uchar)(&dst[0]), (C.int)(len(dst))) // map the hash to G1 - var point pointE1 - if C.map_to_G1((*C.E1)(&point), (*C.uchar)(&hash[0]), (C.int)(len(hash))) != valid { + var point PointE1 + if C.map_to_G1((*C.E1)(&point), (*C.uchar)(&hash[0]), (C.int)(len(hash))) != Valid { return nil } // serialize the point - pointBytes := make([]byte, g1BytesLen) - writePointE1(pointBytes, &point) + pointBytes := make([]byte, G1BytesLen) + WritePointE1(pointBytes, &point) return pointBytes } -func isG1Compressed() bool { - return g1BytesLen == fpBytesLen +func IsG1Compressed() bool { + return G1BytesLen == FpBytesLen } -func isG2Compressed() bool { - return g2BytesLen == 2*fpBytesLen +func IsG2Compressed() bool { + return G2BytesLen == 2*FpBytesLen } // This is only a TEST function used to bench the package pairing // It assumes E1 and E2 inputs are in G1 and G2 respectively, and have the same length. -func multi_pairing(p1 []pointE1, p2 []pointE2) { +func multiPairing(p1 []PointE1, p2 []PointE2) { var res C.Fp12 _ = C.Fp12_multi_pairing(&res, (*C.E1)(&p1[0]), (*C.E2)(&p2[0]), (C.int)(len(p1))) } // Addition in E1, used in benchmark -func addE1(res *pointE1, p1 *pointE1, p2 *pointE1) { +func addE1(res *PointE1, p1 *PointE1, p2 *PointE1) { C.E1_add((*C.E1)(res), (*C.E1)(p1), (*C.E1)(p2)) } // Addition in E2, used in benchmark -func addE2(res *pointE2, p1 *pointE2, p2 *pointE2) { +func addE2(res *PointE2, p1 *PointE2, p2 *PointE2) { C.E2_add((*C.E2)(res), (*C.E2)(p1), (*C.E2)(p2)) } // modular multiplication in F_r, used in benchmark only // it currently calls a Montgomery multiplication -func multFr(res *scalar, f1 *scalar, f2 *scalar) { +func multFr(res *Scalar, f1 *Scalar, f2 *Scalar) { C.Fr_mul_montg((*C.Fr)(res), (*C.Fr)(f1), (*C.Fr)(f2)) } diff --git a/bls12381_utils.h b/internal/bls12381/bls12381_utils.h similarity index 100% rename from bls12381_utils.h rename to internal/bls12381/bls12381_utils.h diff --git a/bls12381_utils_test.go b/internal/bls12381/bls12381_utils_test.go similarity index 72% rename from bls12381_utils_test.go rename to internal/bls12381/bls12381_utils_test.go index e057b52a..5a121722 100644 --- a/bls12381_utils_test.go +++ b/internal/bls12381/bls12381_utils_test.go @@ -27,6 +27,7 @@ import ( "fmt" "testing" + "github.com/onflow/crypto/internal" "github.com/stretchr/testify/assert" "github.com/stretchr/testify/require" ) @@ -36,23 +37,23 @@ func TestScalarMultBLS12381(t *testing.T) { expoBytes, err := hex.DecodeString("444465cb6cc2dba9474e6beeb6a9013fbf1260d073429fb14a31e63e89129390") require.NoError(t, err) - var expo scalar - isZero := mapToFr(&expo, expoBytes) + var expo Scalar + isZero := MapToFr(&expo, expoBytes) require.False(t, isZero) // G1 generator multiplication // Note that generator and random point multiplications // are implemented with the same algorithm t.Run("G1", func(t *testing.T) { - if !isG1Compressed() { + if !IsG1Compressed() { t.Skip() } - var p pointE1 - generatorScalarMultG1(&p, &expo) + var p PointE1 + GeneratorScalarMultG1(&p, &expo) expected, err := hex.DecodeString("96484ca50719f5d2533047960878b6bae8289646c0f00a942a1e6992be9981a9e0c7a51e9918f9b19d178cf04a8018a4") require.NoError(t, err) - pBytes := make([]byte, g1BytesLen) - writePointE1(pBytes, &p) + pBytes := make([]byte, G1BytesLen) + WritePointE1(pBytes, &p) assert.Equal(t, pBytes, expected) }) @@ -60,37 +61,37 @@ func TestScalarMultBLS12381(t *testing.T) { // Note that generator and random point multiplications // are implemented with the same algorithm t.Run("G2", func(t *testing.T) { - if !isG2Compressed() { + if !IsG2Compressed() { t.Skip() } - var p pointE2 - generatorScalarMultG2(&p, &expo) + var p PointE2 + GeneratorScalarMultG2(&p, &expo) expected, err := hex.DecodeString("b35f5043f166848805b98da62dcb9c5d2f25e497bd0d9c461d4a00d19e4e67cc1e813de3c99479d5a2c62fb754fd7df40c4fd60c46834c8ae665343a3ff7dc3cc929de34ad62b7b55974f4e3fd20990d3e564b96e4d33de87716052d58cf823e") require.NoError(t, err) - pBytes := make([]byte, g2BytesLen) - writePointE2(pBytes, &p) + pBytes := make([]byte, G2BytesLen) + WritePointE2(pBytes, &p) assert.Equal(t, pBytes, expected) }) } // G1 and G2 operations func BenchmarkGroupOperations(b *testing.B) { - seed := make([]byte, 2*frBytesLen) + seed := make([]byte, 2*FrBytesLen) _, err := rand.Read(seed) require.NoError(b, err) - var expo scalar - isZero := mapToFr(&expo, seed) + var expo Scalar + isZero := MapToFr(&expo, seed) require.False(b, isZero) - var res pointE1 + var res PointE1 // G1 generator multiplication // Note that generator and random point multiplications // are currently implemented with the same algorithm b.Run("G1 gen expo", func(b *testing.B) { b.ResetTimer() for i := 0; i < b.N; i++ { - generatorScalarMultG1(&res, &expo) + GeneratorScalarMultG1(&res, &expo) } }) @@ -100,7 +101,7 @@ func BenchmarkGroupOperations(b *testing.B) { b.Run("E1 rand expo", func(b *testing.B) { b.ResetTimer() for i := 0; i < b.N; i++ { - res.scalarMultE1(&res, &expo) + res.ScalarMultE1(&res, &expo) } }) @@ -108,16 +109,16 @@ func BenchmarkGroupOperations(b *testing.B) { // Note that generator and random point multiplications // are implemented with the same algorithm b.Run("G2 gen expo", func(b *testing.B) { - var res pointE2 + var res PointE2 b.ResetTimer() for i := 0; i < b.N; i++ { - generatorScalarMultG2(&res, &expo) + GeneratorScalarMultG2(&res, &expo) } }) - var p1, p2 pointE1 - unsafeMapToG1(&p1, seed[:frBytesLen]) - unsafeMapToG1(&p2, seed[frBytesLen:]) + var p1, p2 PointE1 + unsafeMapToG1(&p1, seed[:FrBytesLen]) + unsafeMapToG1(&p2, seed[FrBytesLen:]) b.Run("G1 add", func(b *testing.B) { b.ResetTimer() @@ -126,9 +127,9 @@ func BenchmarkGroupOperations(b *testing.B) { } }) - var q1, q2 pointE2 - unsafeMapToG2(&q1, seed[:frBytesLen]) - unsafeMapToG2(&q2, seed[frBytesLen:]) + var q1, q2 PointE2 + unsafeMapToG2(&q1, seed[:FrBytesLen]) + unsafeMapToG2(&q2, seed[FrBytesLen:]) b.Run("G2 add", func(b *testing.B) { b.ResetTimer() @@ -140,7 +141,7 @@ func BenchmarkGroupOperations(b *testing.B) { // Sanity-check of the map-to-G1 with regards to the IETF draft hash-to-curve func TestMapToG1(t *testing.T) { - if !isG1Compressed() { + if !IsG1Compressed() { t.Skip() } // test vectors from https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-hash-to-curve-14#appendix-J.9.1 @@ -176,65 +177,65 @@ func TestMapToG1(t *testing.T) { // Hashing to G1 bench func BenchmarkMapToG1(b *testing.B) { - input := make([]byte, expandMsgOutput) + input := make([]byte, ExpandMsgOutput) for i := 0; i < len(input); i++ { input[i] = byte(i) } b.ResetTimer() - var p *pointE1 + var p *PointE1 for i := 0; i < b.N; i++ { - p = mapToG1(input) + p = MapToG1(input) } require.NotNil(b, p) } // test subgroup membership check in G1 and G2 func TestSubgroupCheck(t *testing.T) { - prg := getPRG(t) + prg := internal.GetPRG(t) seed := make([]byte, 192) _, err := prg.Read(seed) require.NoError(t, err) t.Run("G1", func(t *testing.T) { - var p pointE1 + var p PointE1 unsafeMapToG1(&p, seed) // point in G1 - assert.True(t, checkMembershipG1(&p)) + assert.True(t, p.CheckMembershipG1()) - unsafeMapToG1Complement(&p, seed) // point in E2\G2 - assert.False(t, checkMembershipG1(&p)) + UnsafeMapToG1Complement(&p, seed) // point in E2\G2 + assert.False(t, p.CheckMembershipG1()) }) t.Run("G2", func(t *testing.T) { - var p pointE2 + var p PointE2 unsafeMapToG2(&p, seed) // point in G2 - assert.True(t, checkMembershipG2(&p)) + assert.True(t, p.CheckMembershipG2()) unsafeMapToG2Complement(&p, seed) // point in E2\G2 - assert.False(t, checkMembershipG2(&p)) + assert.False(t, p.CheckMembershipG2()) }) } // subgroup membership check bench func BenchmarkSubgroupCheck(b *testing.B) { - seed := make([]byte, g2BytesLen) + seed := make([]byte, G2BytesLen) _, err := rand.Read(seed) require.NoError(b, err) b.Run("G1", func(b *testing.B) { - var p pointE1 + var p PointE1 unsafeMapToG1(&p, seed) // point in G1 b.ResetTimer() for i := 0; i < b.N; i++ { - _ = checkMembershipG1(&p) // G1 + _ = p.CheckMembershipG1() // G1 } }) b.Run("G2", func(b *testing.B) { - var p pointE2 + var p PointE2 unsafeMapToG2(&p, seed) // point in G2 b.ResetTimer() for i := 0; i < b.N; i++ { - _ = checkMembershipG2(&p) // G2 + _ = p.CheckMembershipG2() // G2 } }) } @@ -242,34 +243,36 @@ func BenchmarkSubgroupCheck(b *testing.B) { // specific test of G1 points Encode and decode (BLS signature since the library is set for min_sig). // G2 points read and write are implicitly tested by public keys Encode/Decode. func TestReadWriteG1(t *testing.T) { - prg := getPRG(t) - seed := make([]byte, frBytesLen) - bytes := make([]byte, g1BytesLen) + prg := internal.GetPRG(t) + seed := make([]byte, FrBytesLen) + bytes := make([]byte, G1BytesLen) // generate a random G1 point, encode it, decode it, // and compare it the original point t.Run("random points", func(t *testing.T) { iterations := 50 for i := 0; i < iterations; i++ { - var p, q pointE1 + var p, q PointE1 _, err := prg.Read(seed) unsafeMapToG1(&p, seed) require.NoError(t, err) - writePointE1(bytes, &p) - err = readPointE1(&q, bytes) + WritePointE1(bytes, &p) + err = ReadPointE1(&q, bytes) require.NoError(t, err) - assert.True(t, p.equals(&q)) + assert.True(t, p.Equals(&q)) } }) t.Run("infinity", func(t *testing.T) { - var p, q pointE1 - seed := make([]byte, frBytesLen) + var p, q PointE1 + seed := make([]byte, FrBytesLen) unsafeMapToG1(&p, seed) // this results in the infinity point given how `unsafeMapToG1` works with an empty scalar - writePointE1(bytes, &p) - require.True(t, IsBLSSignatureIdentity(bytes)) // sanity check - err := readPointE1(&q, bytes) + WritePointE1(bytes, &p) + unsafeMapToG1(&p, seed) // this results in the infinity point given how `unsafeMapToG1` works with an empty scalar + WritePointE1(bytes, &p) + require.Equal(t, bytes, G1Serialization) // sanity check + err := ReadPointE1(&q, bytes) require.NoError(t, err) - assert.True(t, p.equals(&q)) + assert.True(t, p.Equals(&q)) }) } @@ -277,43 +280,44 @@ func TestReadWriteG1(t *testing.T) { // - inputs `0` and curve order `r` // - inputs `1` and `r+1` func TestMapToFr(t *testing.T) { - var x scalar + var x Scalar offset := 10 - bytes := make([]byte, frBytesLen+offset) - expectedEncoding := make([]byte, frBytesLen) + bytes := make([]byte, FrBytesLen+offset) + expectedEncoding := make([]byte, FrBytesLen) // zero bytes - isZero := mapToFr(&x, bytes) + isZero := MapToFr(&x, bytes) assert.True(t, isZero) - assert.True(t, x.isZero()) - assert.Equal(t, expectedEncoding, newPrKeyBLSBLS12381(&x).Encode()) + assert.True(t, x.IsZero()) + assert.Equal(t, expectedEncoding, x.Encode()) // curve order bytes copy(bytes[offset:], BLS12381Order) - isZero = mapToFr(&x, bytes) + isZero = MapToFr(&x, bytes) assert.True(t, isZero) - assert.True(t, x.isZero()) - assert.Equal(t, expectedEncoding, newPrKeyBLSBLS12381(&x).Encode()) + assert.True(t, x.IsZero()) + assert.Equal(t, expectedEncoding, x.Encode()) // curve order + 1 g1, err := hex.DecodeString("824aa2b2f08f0a91260805272dc51051c6e47ad4fa403b02b4510b647ae3d1770bac0326a805bbefd48056c8c121bdb813e02b6052719f607dacd3a088274f65596bd0d09920b61ab5da61bbdc7f5049334cf11213945d57e5ac7d055d042b7e") require.NoError(t, err) bytes[len(bytes)-1] += 1 - isZero = mapToFr(&x, bytes) + isZero = MapToFr(&x, bytes) assert.False(t, isZero) - assert.False(t, x.isZero()) - expectedEncoding[frBytesLen-1] = 1 - sk := newPrKeyBLSBLS12381(&x) - assert.Equal(t, expectedEncoding, sk.Encode()) + assert.False(t, x.IsZero()) + expectedEncoding[FrBytesLen-1] = 1 + assert.Equal(t, expectedEncoding, x.Encode()) // check scalar is equal to "1" in the lower layer (scalar multiplication) - assert.Equal(t, sk.PublicKey().Encode(), g1, "scalar should be 1, check endianness in the C layer") + var y PointE2 + GeneratorScalarMultG2(&y, &x) + assert.Equal(t, y.Encode(), g1, "scalar should be 1, check endianness in the C layer") // 1 copy(bytes[offset:], expectedEncoding) - isZero = mapToFr(&x, bytes) + isZero = MapToFr(&x, bytes) assert.False(t, isZero) - assert.False(t, x.isZero()) - expectedEncoding[frBytesLen-1] = 1 - sk = newPrKeyBLSBLS12381(&x) - assert.Equal(t, expectedEncoding, sk.Encode()) + assert.False(t, x.IsZero()) + expectedEncoding[FrBytesLen-1] = 1 + assert.Equal(t, expectedEncoding, x.Encode()) // check scalar is equal to "1" in the lower layer (scalar multiplication) - assert.Equal(t, sk.PublicKey().Encode(), g1, "scalar should be 1, check endianness in the C layer") + GeneratorScalarMultG2(&y, &x) + assert.Equal(t, y.Encode(), g1, "scalar should be 1, check endianness in the C layer") } // pairing bench @@ -321,22 +325,22 @@ func BenchmarkPairing(b *testing.B) { const pairingsNumber = 3 // Build random G1 ad G2 points - seed := make([]byte, pairingsNumber*frBytesLen) + seed := make([]byte, pairingsNumber*FrBytesLen) _, err := rand.Read(seed) require.NoError(b, err) - pointsG1 := make([]pointE1, pairingsNumber) - pointsG2 := make([]pointE2, pairingsNumber) + pointsG1 := make([]PointE1, pairingsNumber) + pointsG2 := make([]PointE2, pairingsNumber) for i := 0; i < pairingsNumber; i++ { - unsafeMapToG1(&pointsG1[i], seed[i*frBytesLen:(i+1)*frBytesLen]) - unsafeMapToG2(&pointsG2[i], seed[i*frBytesLen:(i+1)*frBytesLen]) + unsafeMapToG1(&pointsG1[i], seed[i*FrBytesLen:(i+1)*FrBytesLen]) + unsafeMapToG2(&pointsG2[i], seed[i*FrBytesLen:(i+1)*FrBytesLen]) } for p := 1; p <= pairingsNumber; p++ { b.Run(fmt.Sprintf("%d pairing(s)", p), func(b *testing.B) { b.ResetTimer() for i := 0; i < b.N; i++ { - multi_pairing(pointsG1[:p], pointsG2[:p]) + multiPairing(pointsG1[:p], pointsG2[:p]) } }) } @@ -344,14 +348,14 @@ func BenchmarkPairing(b *testing.B) { // F_r operations func BenchmarkFrOperation(b *testing.B) { - seed := make([]byte, 2*frBytesLen) + seed := make([]byte, 2*FrBytesLen) _, err := rand.Read(seed) require.NoError(b, err) - var f1, f2 scalar - isZero := mapToFr(&f1, seed[:frBytesLen]) + var f1, f2 Scalar + isZero := MapToFr(&f1, seed[:FrBytesLen]) require.False(b, isZero) - isZero = mapToFr(&f2, seed[frBytesLen:]) + isZero = MapToFr(&f2, seed[FrBytesLen:]) require.False(b, isZero) b.Run("modular mult", func(b *testing.B) { diff --git a/blst_assembly.S b/internal/bls12381/blst_assembly.S similarity index 100% rename from blst_assembly.S rename to internal/bls12381/blst_assembly.S diff --git a/blst_include.h b/internal/bls12381/blst_include.h similarity index 100% rename from blst_include.h rename to internal/bls12381/blst_include.h diff --git a/blst_src/README.md b/internal/bls12381/blst_src/README.md similarity index 100% rename from blst_src/README.md rename to internal/bls12381/blst_src/README.md diff --git a/blst_src/aggregate.c b/internal/bls12381/blst_src/aggregate.c similarity index 100% rename from blst_src/aggregate.c rename to internal/bls12381/blst_src/aggregate.c diff --git a/blst_src/blst_src.c b/internal/bls12381/blst_src/blst_src.c similarity index 100% rename from blst_src/blst_src.c rename to internal/bls12381/blst_src/blst_src.c diff --git a/blst_src/build/assembly.S b/internal/bls12381/blst_src/build/assembly.S similarity index 100% rename from blst_src/build/assembly.S rename to internal/bls12381/blst_src/build/assembly.S diff --git a/blst_src/build/bindings_trim.pl b/internal/bls12381/blst_src/build/bindings_trim.pl similarity index 100% rename from blst_src/build/bindings_trim.pl rename to internal/bls12381/blst_src/build/bindings_trim.pl diff --git a/blst_src/build/cheri/add_mod_256-armv8.S b/internal/bls12381/blst_src/build/cheri/add_mod_256-armv8.S similarity index 100% rename from blst_src/build/cheri/add_mod_256-armv8.S rename to internal/bls12381/blst_src/build/cheri/add_mod_256-armv8.S diff --git a/blst_src/build/cheri/add_mod_384-armv8.S b/internal/bls12381/blst_src/build/cheri/add_mod_384-armv8.S similarity index 100% rename from blst_src/build/cheri/add_mod_384-armv8.S rename to internal/bls12381/blst_src/build/cheri/add_mod_384-armv8.S diff --git a/blst_src/build/cheri/ct_inverse_mod_256-armv8.S b/internal/bls12381/blst_src/build/cheri/ct_inverse_mod_256-armv8.S similarity index 100% rename from blst_src/build/cheri/ct_inverse_mod_256-armv8.S rename to internal/bls12381/blst_src/build/cheri/ct_inverse_mod_256-armv8.S diff --git a/blst_src/build/cheri/ct_inverse_mod_384-armv8.S b/internal/bls12381/blst_src/build/cheri/ct_inverse_mod_384-armv8.S similarity index 100% rename from blst_src/build/cheri/ct_inverse_mod_384-armv8.S rename to internal/bls12381/blst_src/build/cheri/ct_inverse_mod_384-armv8.S diff --git a/blst_src/build/cheri/ct_is_square_mod_384-armv8.S b/internal/bls12381/blst_src/build/cheri/ct_is_square_mod_384-armv8.S similarity index 100% rename from blst_src/build/cheri/ct_is_square_mod_384-armv8.S rename to internal/bls12381/blst_src/build/cheri/ct_is_square_mod_384-armv8.S diff --git a/blst_src/build/cheri/div3w-armv8.S b/internal/bls12381/blst_src/build/cheri/div3w-armv8.S similarity index 100% rename from blst_src/build/cheri/div3w-armv8.S rename to internal/bls12381/blst_src/build/cheri/div3w-armv8.S diff --git a/blst_src/build/cheri/mul_mont_256-armv8.S b/internal/bls12381/blst_src/build/cheri/mul_mont_256-armv8.S similarity index 100% rename from blst_src/build/cheri/mul_mont_256-armv8.S rename to internal/bls12381/blst_src/build/cheri/mul_mont_256-armv8.S diff --git a/blst_src/build/cheri/mul_mont_384-armv8.S b/internal/bls12381/blst_src/build/cheri/mul_mont_384-armv8.S similarity index 100% rename from blst_src/build/cheri/mul_mont_384-armv8.S rename to internal/bls12381/blst_src/build/cheri/mul_mont_384-armv8.S diff --git a/blst_src/build/cheri/sha256-armv8.S b/internal/bls12381/blst_src/build/cheri/sha256-armv8.S similarity index 100% rename from blst_src/build/cheri/sha256-armv8.S rename to internal/bls12381/blst_src/build/cheri/sha256-armv8.S diff --git a/blst_src/build/coff/add_mod_256-armv8.S b/internal/bls12381/blst_src/build/coff/add_mod_256-armv8.S similarity index 100% rename from blst_src/build/coff/add_mod_256-armv8.S rename to internal/bls12381/blst_src/build/coff/add_mod_256-armv8.S diff --git a/blst_src/build/coff/add_mod_256-x86_64.s b/internal/bls12381/blst_src/build/coff/add_mod_256-x86_64.s similarity index 100% rename from blst_src/build/coff/add_mod_256-x86_64.s rename to internal/bls12381/blst_src/build/coff/add_mod_256-x86_64.s diff --git a/blst_src/build/coff/add_mod_384-armv8.S b/internal/bls12381/blst_src/build/coff/add_mod_384-armv8.S similarity index 100% rename from blst_src/build/coff/add_mod_384-armv8.S rename to internal/bls12381/blst_src/build/coff/add_mod_384-armv8.S diff --git a/blst_src/build/coff/add_mod_384-x86_64.s 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blst_src/build/mach-o/mul_mont_384-armv8.S rename to internal/bls12381/blst_src/build/mach-o/mul_mont_384-armv8.S diff --git a/blst_src/build/mach-o/mulq_mont_256-x86_64.s b/internal/bls12381/blst_src/build/mach-o/mulq_mont_256-x86_64.s similarity index 100% rename from blst_src/build/mach-o/mulq_mont_256-x86_64.s rename to internal/bls12381/blst_src/build/mach-o/mulq_mont_256-x86_64.s diff --git a/blst_src/build/mach-o/mulq_mont_384-x86_64.s b/internal/bls12381/blst_src/build/mach-o/mulq_mont_384-x86_64.s similarity index 100% rename from blst_src/build/mach-o/mulq_mont_384-x86_64.s rename to internal/bls12381/blst_src/build/mach-o/mulq_mont_384-x86_64.s diff --git a/blst_src/build/mach-o/mulx_mont_256-x86_64.s b/internal/bls12381/blst_src/build/mach-o/mulx_mont_256-x86_64.s similarity index 100% rename from blst_src/build/mach-o/mulx_mont_256-x86_64.s rename to internal/bls12381/blst_src/build/mach-o/mulx_mont_256-x86_64.s diff --git a/blst_src/build/mach-o/mulx_mont_384-x86_64.s b/internal/bls12381/blst_src/build/mach-o/mulx_mont_384-x86_64.s similarity index 100% rename from blst_src/build/mach-o/mulx_mont_384-x86_64.s rename to internal/bls12381/blst_src/build/mach-o/mulx_mont_384-x86_64.s diff --git a/blst_src/build/mach-o/sha256-armv8.S b/internal/bls12381/blst_src/build/mach-o/sha256-armv8.S similarity index 100% rename from blst_src/build/mach-o/sha256-armv8.S rename to internal/bls12381/blst_src/build/mach-o/sha256-armv8.S diff --git a/blst_src/build/mach-o/sha256-portable-x86_64.s b/internal/bls12381/blst_src/build/mach-o/sha256-portable-x86_64.s similarity index 100% rename from blst_src/build/mach-o/sha256-portable-x86_64.s rename to internal/bls12381/blst_src/build/mach-o/sha256-portable-x86_64.s diff --git a/blst_src/build/mach-o/sha256-x86_64.s b/internal/bls12381/blst_src/build/mach-o/sha256-x86_64.s similarity index 100% rename from blst_src/build/mach-o/sha256-x86_64.s rename to internal/bls12381/blst_src/build/mach-o/sha256-x86_64.s diff --git a/blst_src/build/refresh.sh b/internal/bls12381/blst_src/build/refresh.sh similarity index 100% rename from blst_src/build/refresh.sh rename to internal/bls12381/blst_src/build/refresh.sh diff --git a/blst_src/build/srcroot.go b/internal/bls12381/blst_src/build/srcroot.go similarity index 100% rename from blst_src/build/srcroot.go rename to internal/bls12381/blst_src/build/srcroot.go diff --git a/blst_src/build/win64/add_mod_256-armv8.asm b/internal/bls12381/blst_src/build/win64/add_mod_256-armv8.asm similarity index 100% rename from blst_src/build/win64/add_mod_256-armv8.asm rename to internal/bls12381/blst_src/build/win64/add_mod_256-armv8.asm diff --git a/blst_src/build/win64/add_mod_256-x86_64.asm b/internal/bls12381/blst_src/build/win64/add_mod_256-x86_64.asm similarity index 100% rename from blst_src/build/win64/add_mod_256-x86_64.asm rename to internal/bls12381/blst_src/build/win64/add_mod_256-x86_64.asm diff --git a/blst_src/build/win64/add_mod_384-armv8.asm b/internal/bls12381/blst_src/build/win64/add_mod_384-armv8.asm similarity index 100% rename from blst_src/build/win64/add_mod_384-armv8.asm rename to internal/bls12381/blst_src/build/win64/add_mod_384-armv8.asm diff --git a/blst_src/build/win64/add_mod_384-x86_64.asm b/internal/bls12381/blst_src/build/win64/add_mod_384-x86_64.asm similarity index 100% rename from blst_src/build/win64/add_mod_384-x86_64.asm rename to internal/bls12381/blst_src/build/win64/add_mod_384-x86_64.asm diff --git a/blst_src/build/win64/add_mod_384x384-x86_64.asm b/internal/bls12381/blst_src/build/win64/add_mod_384x384-x86_64.asm similarity index 100% rename from blst_src/build/win64/add_mod_384x384-x86_64.asm rename to internal/bls12381/blst_src/build/win64/add_mod_384x384-x86_64.asm diff --git a/blst_src/build/win64/blst.def b/internal/bls12381/blst_src/build/win64/blst.def similarity index 100% rename from blst_src/build/win64/blst.def rename to internal/bls12381/blst_src/build/win64/blst.def diff --git a/blst_src/build/win64/ct_inverse_mod_256-armv8.asm b/internal/bls12381/blst_src/build/win64/ct_inverse_mod_256-armv8.asm similarity index 100% rename from blst_src/build/win64/ct_inverse_mod_256-armv8.asm rename to internal/bls12381/blst_src/build/win64/ct_inverse_mod_256-armv8.asm diff --git a/blst_src/build/win64/ct_inverse_mod_256-x86_64.asm b/internal/bls12381/blst_src/build/win64/ct_inverse_mod_256-x86_64.asm similarity index 100% rename from blst_src/build/win64/ct_inverse_mod_256-x86_64.asm rename to internal/bls12381/blst_src/build/win64/ct_inverse_mod_256-x86_64.asm diff --git a/blst_src/build/win64/ct_inverse_mod_384-armv8.asm b/internal/bls12381/blst_src/build/win64/ct_inverse_mod_384-armv8.asm similarity index 100% rename from blst_src/build/win64/ct_inverse_mod_384-armv8.asm rename to internal/bls12381/blst_src/build/win64/ct_inverse_mod_384-armv8.asm diff --git a/blst_src/build/win64/ct_is_square_mod_384-armv8.asm b/internal/bls12381/blst_src/build/win64/ct_is_square_mod_384-armv8.asm similarity index 100% rename from blst_src/build/win64/ct_is_square_mod_384-armv8.asm rename to internal/bls12381/blst_src/build/win64/ct_is_square_mod_384-armv8.asm diff --git a/blst_src/build/win64/ct_is_square_mod_384-x86_64.asm b/internal/bls12381/blst_src/build/win64/ct_is_square_mod_384-x86_64.asm similarity index 100% rename from blst_src/build/win64/ct_is_square_mod_384-x86_64.asm rename to internal/bls12381/blst_src/build/win64/ct_is_square_mod_384-x86_64.asm diff --git a/blst_src/build/win64/ctq_inverse_mod_384-x86_64.asm b/internal/bls12381/blst_src/build/win64/ctq_inverse_mod_384-x86_64.asm similarity index 100% rename from blst_src/build/win64/ctq_inverse_mod_384-x86_64.asm rename to internal/bls12381/blst_src/build/win64/ctq_inverse_mod_384-x86_64.asm diff --git a/blst_src/build/win64/ctx_inverse_mod_384-x86_64.asm b/internal/bls12381/blst_src/build/win64/ctx_inverse_mod_384-x86_64.asm similarity index 100% rename from blst_src/build/win64/ctx_inverse_mod_384-x86_64.asm rename to internal/bls12381/blst_src/build/win64/ctx_inverse_mod_384-x86_64.asm diff --git a/blst_src/build/win64/div3w-armv8.asm b/internal/bls12381/blst_src/build/win64/div3w-armv8.asm similarity index 100% rename from blst_src/build/win64/div3w-armv8.asm rename to internal/bls12381/blst_src/build/win64/div3w-armv8.asm diff --git a/blst_src/build/win64/div3w-x86_64.asm b/internal/bls12381/blst_src/build/win64/div3w-x86_64.asm similarity index 100% rename from blst_src/build/win64/div3w-x86_64.asm rename to internal/bls12381/blst_src/build/win64/div3w-x86_64.asm diff --git a/blst_src/build/win64/dll.c b/internal/bls12381/blst_src/build/win64/dll.c similarity index 100% rename from blst_src/build/win64/dll.c rename to internal/bls12381/blst_src/build/win64/dll.c diff --git a/blst_src/build/win64/mul_mont_256-armv8.asm b/internal/bls12381/blst_src/build/win64/mul_mont_256-armv8.asm similarity index 100% rename from blst_src/build/win64/mul_mont_256-armv8.asm rename to internal/bls12381/blst_src/build/win64/mul_mont_256-armv8.asm diff --git a/blst_src/build/win64/mul_mont_384-armv8.asm b/internal/bls12381/blst_src/build/win64/mul_mont_384-armv8.asm similarity index 100% rename from blst_src/build/win64/mul_mont_384-armv8.asm rename to internal/bls12381/blst_src/build/win64/mul_mont_384-armv8.asm diff --git a/blst_src/build/win64/mulq_mont_256-x86_64.asm b/internal/bls12381/blst_src/build/win64/mulq_mont_256-x86_64.asm similarity index 100% rename from blst_src/build/win64/mulq_mont_256-x86_64.asm rename to internal/bls12381/blst_src/build/win64/mulq_mont_256-x86_64.asm diff --git a/blst_src/build/win64/mulq_mont_384-x86_64.asm b/internal/bls12381/blst_src/build/win64/mulq_mont_384-x86_64.asm similarity index 100% rename from blst_src/build/win64/mulq_mont_384-x86_64.asm rename to internal/bls12381/blst_src/build/win64/mulq_mont_384-x86_64.asm diff --git a/blst_src/build/win64/mulx_mont_256-x86_64.asm b/internal/bls12381/blst_src/build/win64/mulx_mont_256-x86_64.asm similarity index 100% rename from blst_src/build/win64/mulx_mont_256-x86_64.asm rename to internal/bls12381/blst_src/build/win64/mulx_mont_256-x86_64.asm diff --git a/blst_src/build/win64/mulx_mont_384-x86_64.asm b/internal/bls12381/blst_src/build/win64/mulx_mont_384-x86_64.asm similarity index 100% rename from blst_src/build/win64/mulx_mont_384-x86_64.asm rename to internal/bls12381/blst_src/build/win64/mulx_mont_384-x86_64.asm diff --git a/blst_src/build/win64/sha256-armv8.asm b/internal/bls12381/blst_src/build/win64/sha256-armv8.asm similarity index 100% rename from blst_src/build/win64/sha256-armv8.asm rename to internal/bls12381/blst_src/build/win64/sha256-armv8.asm diff --git a/blst_src/build/win64/sha256-x86_64.asm b/internal/bls12381/blst_src/build/win64/sha256-x86_64.asm similarity index 100% rename from blst_src/build/win64/sha256-x86_64.asm rename to internal/bls12381/blst_src/build/win64/sha256-x86_64.asm diff --git a/blst_src/bulk_addition.c b/internal/bls12381/blst_src/bulk_addition.c similarity index 100% rename from blst_src/bulk_addition.c rename to internal/bls12381/blst_src/bulk_addition.c diff --git a/blst_src/bytes.h b/internal/bls12381/blst_src/bytes.h similarity index 100% rename from blst_src/bytes.h rename to internal/bls12381/blst_src/bytes.h diff --git a/blst_src/client_min_pk.c b/internal/bls12381/blst_src/client_min_pk.c similarity index 100% rename from blst_src/client_min_pk.c rename to internal/bls12381/blst_src/client_min_pk.c diff --git a/blst_src/client_min_sig.c b/internal/bls12381/blst_src/client_min_sig.c similarity index 100% rename from blst_src/client_min_sig.c rename to internal/bls12381/blst_src/client_min_sig.c diff --git a/blst_src/consts.c b/internal/bls12381/blst_src/consts.c similarity index 100% rename from blst_src/consts.c rename to internal/bls12381/blst_src/consts.c diff --git a/blst_src/consts.h b/internal/bls12381/blst_src/consts.h similarity index 100% rename from blst_src/consts.h rename to internal/bls12381/blst_src/consts.h diff --git a/blst_src/cpuid.c b/internal/bls12381/blst_src/cpuid.c similarity index 100% rename from blst_src/cpuid.c rename to internal/bls12381/blst_src/cpuid.c diff --git a/blst_src/e1.c b/internal/bls12381/blst_src/e1.c similarity index 100% rename from blst_src/e1.c rename to internal/bls12381/blst_src/e1.c diff --git a/blst_src/e2.c b/internal/bls12381/blst_src/e2.c similarity index 100% rename from blst_src/e2.c rename to internal/bls12381/blst_src/e2.c diff --git a/blst_src/ec_mult.h b/internal/bls12381/blst_src/ec_mult.h similarity index 100% rename from blst_src/ec_mult.h rename to internal/bls12381/blst_src/ec_mult.h diff --git a/blst_src/ec_ops.h b/internal/bls12381/blst_src/ec_ops.h similarity index 100% rename from blst_src/ec_ops.h rename to internal/bls12381/blst_src/ec_ops.h diff --git a/blst_src/errors.h b/internal/bls12381/blst_src/errors.h similarity index 100% rename from blst_src/errors.h rename to internal/bls12381/blst_src/errors.h diff --git a/blst_src/exp.c b/internal/bls12381/blst_src/exp.c similarity index 100% rename from blst_src/exp.c rename to internal/bls12381/blst_src/exp.c diff --git a/blst_src/exports.c b/internal/bls12381/blst_src/exports.c similarity index 100% rename from blst_src/exports.c rename to internal/bls12381/blst_src/exports.c diff --git a/blst_src/fields.h b/internal/bls12381/blst_src/fields.h similarity index 100% rename from blst_src/fields.h rename to internal/bls12381/blst_src/fields.h diff --git a/blst_src/fp12_tower.c b/internal/bls12381/blst_src/fp12_tower.c similarity index 100% rename from blst_src/fp12_tower.c rename to internal/bls12381/blst_src/fp12_tower.c diff --git a/blst_src/hash_to_field.c b/internal/bls12381/blst_src/hash_to_field.c similarity index 100% rename from blst_src/hash_to_field.c rename to internal/bls12381/blst_src/hash_to_field.c diff --git a/blst_src/keygen.c b/internal/bls12381/blst_src/keygen.c similarity index 100% rename from blst_src/keygen.c rename to internal/bls12381/blst_src/keygen.c diff --git a/blst_src/map_to_g1.c b/internal/bls12381/blst_src/map_to_g1.c similarity index 100% rename from blst_src/map_to_g1.c rename to internal/bls12381/blst_src/map_to_g1.c diff --git a/blst_src/map_to_g2.c b/internal/bls12381/blst_src/map_to_g2.c similarity index 100% rename from blst_src/map_to_g2.c rename to internal/bls12381/blst_src/map_to_g2.c diff --git a/blst_src/multi_scalar.c b/internal/bls12381/blst_src/multi_scalar.c similarity index 100% rename from blst_src/multi_scalar.c rename to internal/bls12381/blst_src/multi_scalar.c diff --git a/blst_src/no_asm.h b/internal/bls12381/blst_src/no_asm.h similarity index 100% rename from blst_src/no_asm.h rename to internal/bls12381/blst_src/no_asm.h diff --git a/blst_src/pairing.c b/internal/bls12381/blst_src/pairing.c similarity index 100% rename from blst_src/pairing.c rename to internal/bls12381/blst_src/pairing.c diff --git a/blst_src/pentaroot-addchain.h b/internal/bls12381/blst_src/pentaroot-addchain.h similarity index 100% rename from blst_src/pentaroot-addchain.h rename to internal/bls12381/blst_src/pentaroot-addchain.h diff --git a/blst_src/pentaroot.c b/internal/bls12381/blst_src/pentaroot.c similarity index 100% rename from blst_src/pentaroot.c rename to internal/bls12381/blst_src/pentaroot.c diff --git a/blst_src/point.h b/internal/bls12381/blst_src/point.h similarity index 100% rename from blst_src/point.h rename to internal/bls12381/blst_src/point.h diff --git a/blst_src/rb_tree.c b/internal/bls12381/blst_src/rb_tree.c similarity index 100% rename from blst_src/rb_tree.c rename to internal/bls12381/blst_src/rb_tree.c diff --git a/blst_src/recip-addchain.h b/internal/bls12381/blst_src/recip-addchain.h similarity index 100% rename from blst_src/recip-addchain.h rename to internal/bls12381/blst_src/recip-addchain.h diff --git a/blst_src/recip.c b/internal/bls12381/blst_src/recip.c similarity index 100% rename from blst_src/recip.c rename to internal/bls12381/blst_src/recip.c diff --git a/blst_src/sha256.h b/internal/bls12381/blst_src/sha256.h similarity index 100% rename from blst_src/sha256.h rename to internal/bls12381/blst_src/sha256.h diff --git a/blst_src/sqrt-addchain.h b/internal/bls12381/blst_src/sqrt-addchain.h similarity index 100% rename from blst_src/sqrt-addchain.h rename to internal/bls12381/blst_src/sqrt-addchain.h diff --git a/blst_src/sqrt.c b/internal/bls12381/blst_src/sqrt.c similarity index 100% rename from blst_src/sqrt.c rename to internal/bls12381/blst_src/sqrt.c diff --git a/blst_src/vect.c b/internal/bls12381/blst_src/vect.c similarity index 100% rename from blst_src/vect.c rename to internal/bls12381/blst_src/vect.c diff --git a/blst_src/vect.h b/internal/bls12381/blst_src/vect.h similarity index 100% rename from blst_src/vect.h rename to internal/bls12381/blst_src/vect.h diff --git a/internal/internal.go b/internal/internal.go new file mode 100644 index 00000000..9cb583fc --- /dev/null +++ b/internal/internal.go @@ -0,0 +1,80 @@ +/* + * Flow Crypto + * + * Copyright Flow Foundation. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package internal + +import ( + "crypto/rand" + "errors" + "fmt" +) + +// Minimum targeted bits of security. +// This is used as a reference but it doesn't mean all implemented primitives provide this minimum. +const SecurityBits = 128 + +// TODO: update this code to make sure +// the function isn't removed by the compiler +// https://github.com/golang/go/issues/21865 +func Overwrite(data []byte) { + _, err := rand.Read(data) // checking err is enough + if err != nil { + // zero the buffer if randomizing failed + for i := 0; i < len(data); i++ { + data[i] = 0 + } + } +} + +// InvalidInputsError is an error returned when a crypto API receives invalid inputs. +// It allows a function caller differentiate unexpected program errors from errors caused by +// invalid inputs. +type InvalidInputsError struct { + error +} + +func (e InvalidInputsError) Unwrap() error { + return e.error +} + +// InvalidHasherSizeError is an error returned when a crypto API is called with a hasher +// with an output size not suited with the cryptographic operation. +type InvalidHasherSizeError struct { + error +} + +func (e InvalidHasherSizeError) Unwrap() error { + return e.error +} + +// ErrNilHasher is returned when a nil hasher is used +var ErrNilHasher = errors.New("hasher cannot be nil") + +// InvalidInputsErrorf constructs a new InvalidInputsError +func InvalidInputsErrorf(msg string, args ...interface{}) error { + return &InvalidInputsError{ + error: fmt.Errorf(msg, args...), + } +} + +// InvalidHasherSizeErrorf constructs a new InvalidHasherSizeError +func InvalidHasherSizeErrorf(msg string, args ...interface{}) error { + return &InvalidHasherSizeError{ + error: fmt.Errorf(msg, args...), + } +} diff --git a/internal/test_utils.go b/internal/test_utils.go new file mode 100644 index 00000000..a458dcb9 --- /dev/null +++ b/internal/test_utils.go @@ -0,0 +1,33 @@ +/* + * Flow Crypto + * + * Copyright Flow Foundation. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package internal + +import ( + "math/rand" + "testing" + "time" +) + +// GetPRG returns a deterministic PRG for testing +func GetPRG(t *testing.T) *rand.Rand { + seed := time.Now().UnixNano() + t.Logf("rng seed is %d", seed) + rng := rand.New(rand.NewSource(seed)) + return rng +} diff --git a/no_cgo_test.go b/no_cgo_test.go deleted file mode 100644 index 8e634dad..00000000 --- a/no_cgo_test.go +++ /dev/null @@ -1,47 +0,0 @@ -//go:build !cgo && no_cgo -// +build !cgo,no_cgo - -package crypto_test - -import ( - "testing" - - "github.com/onflow/crypto" - "github.com/stretchr/testify/assert" -) - -// Test all public functions requiring cgo. -// These functions must panic if built without cgo. -func TestNoRelicPanic(t *testing.T) { - assert.Panics(t, func() { _, _ = crypto.GeneratePrivateKey(crypto.BLSBLS12381, nil) }) - assert.Panics(t, func() { _, _ = crypto.DecodePrivateKey(crypto.BLSBLS12381, nil) }) - assert.Panics(t, func() { _, _ = crypto.DecodePublicKey(crypto.BLSBLS12381, nil) }) - assert.Panics(t, func() { _, _ = crypto.DecodePublicKeyCompressed(crypto.BLSBLS12381, nil) }) - assert.Panics(t, func() { _ = crypto.NewExpandMsgXOFKMAC128("") }) - assert.Panics(t, func() { _ = crypto.BLSInvalidSignature() }) - assert.Panics(t, func() { _, _ = crypto.BLSGeneratePOP(nil) }) - assert.Panics(t, func() { _, _ = crypto.BLSVerifyPOP(nil, nil) }) - assert.Panics(t, func() { _, _ = crypto.AggregateBLSSignatures(nil) }) - assert.Panics(t, func() { _, _ = crypto.AggregateBLSPrivateKeys(nil) }) - assert.Panics(t, func() { _, _ = crypto.AggregateBLSPublicKeys(nil) }) - assert.Panics(t, func() { _ = crypto.IdentityBLSPublicKey() }) - assert.Panics(t, func() { _ = crypto.IsBLSAggregateEmptyListError(nil) }) - assert.Panics(t, func() { _ = crypto.IsInvalidSignatureError(nil) }) - assert.Panics(t, func() { _ = crypto.IsNotBLSKeyError(nil) }) - assert.Panics(t, func() { _ = crypto.IsBLSSignatureIdentity(nil) }) - assert.Panics(t, func() { _, _ = crypto.RemoveBLSPublicKeys(nil, nil) }) - assert.Panics(t, func() { _, _ = crypto.VerifyBLSSignatureOneMessage(nil, nil, nil, nil) }) - assert.Panics(t, func() { _, _ = crypto.VerifyBLSSignatureManyMessages(nil, nil, nil, nil) }) - assert.Panics(t, func() { _, _ = crypto.BatchVerifyBLSSignaturesOneMessage(nil, nil, nil, nil) }) - assert.Panics(t, func() { _, _ = crypto.SPOCKProve(nil, nil, nil) }) - assert.Panics(t, func() { _, _ = crypto.SPOCKVerify(nil, nil, nil, nil) }) - assert.Panics(t, func() { _, _ = crypto.SPOCKVerifyAgainstData(nil, nil, nil, nil) }) - assert.Panics(t, func() { _, _ = crypto.NewBLSThresholdSignatureParticipant(nil, nil, 0, 0, nil, nil, "") }) - assert.Panics(t, func() { _, _ = crypto.NewBLSThresholdSignatureInspector(nil, nil, 0, nil, "") }) - assert.Panics(t, func() { _, _ = crypto.BLSReconstructThresholdSignature(0, 0, nil, nil) }) - assert.Panics(t, func() { _, _ = crypto.EnoughShares(0, 0) }) - assert.Panics(t, func() { _, _, _, _ = crypto.BLSThresholdKeyGen(0, 0, nil) }) - assert.Panics(t, func() { _, _ = crypto.NewFeldmanVSS(0, 0, 0, nil, 0) }) - assert.Panics(t, func() { _, _ = crypto.NewFeldmanVSSQual(0, 0, 0, nil, 0) }) - assert.Panics(t, func() { _, _ = crypto.NewJointFeldman(0, 0, 0, nil) }) -} diff --git a/random/rand_test.go b/random/rand_test.go index e4f6f9bb..5d625b95 100644 --- a/random/rand_test.go +++ b/random/rand_test.go @@ -22,11 +22,12 @@ import ( "bytes" mrand "math/rand" "testing" - "time" "github.com/stretchr/testify/assert" "github.com/stretchr/testify/require" "golang.org/x/crypto/chacha20" + + "github.com/onflow/crypto/internal" ) // sanity check for the underlying implementation of Chacha20 @@ -98,13 +99,6 @@ func TestChacha20Compliance(t *testing.T) { }) } -func getPRG(t *testing.T) *mrand.Rand { - random := time.Now().UnixNano() - t.Logf("rng seed is %d", random) - rng := mrand.New(mrand.NewSource(random)) - return rng -} - // The tests are targeting the PRG implementations in the package. // For now, the tests are only used for Chacha20 PRG, but can be ported // to test another PRG implementation. @@ -112,7 +106,7 @@ func getPRG(t *testing.T) *mrand.Rand { // Simple unit testing of UintN using a basic randomness test. // It doesn't perform advanced statistical tests. func TestUintN(t *testing.T) { - rand := getPRG(t) + rand := internal.GetPRG(t) seed := make([]byte, Chacha20SeedLen) _, err := rand.Read(seed) require.NoError(t, err) @@ -154,7 +148,7 @@ func TestUintN(t *testing.T) { // // SubPermutation tests cover Permutation as well. func TestSubPermutation(t *testing.T) { - rand := getPRG(t) + rand := internal.GetPRG(t) seed := make([]byte, Chacha20SeedLen) _, err := rand.Read(seed) @@ -231,7 +225,7 @@ func TestSubPermutation(t *testing.T) { // Simple unit testing of Shuffle using a basic randomness test. // It doesn't perform advanced statistical tests. func TestShuffle(t *testing.T) { - rand := getPRG(t) + rand := internal.GetPRG(t) seed := make([]byte, Chacha20SeedLen) _, err := rand.Read(seed) @@ -306,7 +300,7 @@ func TestShuffle(t *testing.T) { } func TestSamples(t *testing.T) { - rand := getPRG(t) + rand := internal.GetPRG(t) seed := make([]byte, Chacha20SeedLen) _, err := rand.Read(seed) @@ -391,7 +385,7 @@ func TestSamples(t *testing.T) { // TestStateRestore tests the serilaization and deserialization functions // Store and Restore func TestStateRestore(t *testing.T) { - rand := getPRG(t) + rand := internal.GetPRG(t) // generate a seed seed := make([]byte, Chacha20SeedLen) diff --git a/bls.go b/sign/bls/bls.go similarity index 77% rename from bls.go rename to sign/bls/bls.go index e80465cf..e662e6d2 100644 --- a/bls.go +++ b/sign/bls/bls.go @@ -16,7 +16,7 @@ * limitations under the License. */ -package crypto +package bls // BLS signature scheme implementation using the BLS12-381 curve // ([zcash]https://electriccoin.co/blog/new-snark-curve/). @@ -41,8 +41,9 @@ package crypto // - SPoCK scheme based on BLS: verifies two signatures are generated from the same message, // even though the message is unknown to the verifier. -// #cgo noescape E2_in_G2 -// #cgo nocallback E2_in_G2 +// #cgo CFLAGS: -I${SRCDIR}/ -I${SRCDIR}/../../internal/bls12381 -I${SRCDIR}/../../internal/bls12381/blst_src -I${SRCDIR}/../../internal/bls12381/blst_src/build -D__BLST_CGO__ -Wall -fno-builtin-memcpy -fno-builtin-memset -Wno-unused-function -Wno-unused-macros -Wno-unused-variable +// #cgo amd64 CFLAGS: -D__ADX__ -mno-avx +// #cgo loong64 mips64 mips64le ppc64 ppc64le riscv64 s390x CFLAGS: -D__BLST_NO_ASM__ // #cgo noescape bls_sign // #cgo nocallback bls_sign // #cgo noescape bls_verify @@ -55,18 +56,23 @@ import ( "crypto/hkdf" "crypto/sha256" "fmt" + "unsafe" + "github.com/onflow/crypto/common" "github.com/onflow/crypto/hash" + "github.com/onflow/crypto/internal" + bls12 "github.com/onflow/crypto/internal/bls12381" + "github.com/onflow/crypto/sign" ) const ( // SignatureLenBLSBLS12381 is the serialization size of a `G_1` element. - SignatureLenBLSBLS12381 = g1BytesLen + SignatureLenBLSBLS12381 = bls12.G1BytesLen // PubKeyLenBLSBLS12381 is the serialization size of a `G_2` element. - PubKeyLenBLSBLS12381 = g2BytesLen + PubKeyLenBLSBLS12381 = bls12.G2BytesLen // PrKeyLenBLSBLS12381 is the serialization size of a `F_r` element, // where `r` is the order of `G_1` and `G_2`. - PrKeyLenBLSBLS12381 = frBytesLen + PrKeyLenBLSBLS12381 = bls12.FrBytesLen // Hash to curve params // hash to curve suite ID of the form : CurveID_ || HashID_ || MapID_ || encodingVariant_ @@ -78,19 +84,27 @@ const ( // Cipher suite used for BLS PoP of the form : BLS_POP_ || h2cSuiteID || SchemeTag_ // The PoP cipher suite is guaranteed to be different than all signature ciphersuites blsPOPCipherSuite = "BLS_POP_" + h2cSuiteID + schemeTag - // expandMsgOutput is the output length of the expand_message step as required by the - // hash_to_curve algorithm (and the map to G1 step). - expandMsgOutput = int(C.MAP_TO_G1_INPUT_LEN) ) // blsBLS12381Algo, embeds SignAlgo type blsBLS12381Algo struct { // the signing algo and parameters - algo SigningAlgorithm + algo sign.SigningAlgorithm } -// BLS context on the BLS 12-381 curve -var blsInstance *blsBLS12381Algo +var g2PublicKey pubKeyBLSBLS12381 + +// init the BLS12-381 curve context +func init() { + // register the BLS context on the BLS 12-381 curve instance in the `sign` package + if err := sign.RegisterSigner(sign.BLSBLS12381, &blsBLS12381Algo{algo: sign.BLSBLS12381}); err != nil { + panic(err) + } + + // set a global point to infinity + g2PublicKey.point.SetInfinity() + g2PublicKey.isIdentity = true +} // NewExpandMsgXOFKMAC128 returns a new expand_message_xof instance for // the hash-to-curve function, hashing data to G1 on BLS12 381. @@ -125,7 +139,7 @@ func internalExpandMsgXOFKMAC128(key string) hash.Hasher { const blsKMACFunction = "H2C" // the error is ignored as the parameter lengths are chosen to be in the correct range for kmac // (tested by TestBLSBLS12381Hasher) - kmac, _ := hash.NewKMAC_128([]byte(key), []byte(blsKMACFunction), expandMsgOutput) + kmac, _ := hash.NewKMAC_128([]byte(key), []byte(blsKMACFunction), bls12.ExpandMsgOutput) return kmac } @@ -135,10 +149,10 @@ func internalExpandMsgXOFKMAC128(key string) hash.Hasher { // - invalidHasherSizeError if the hasher's output size is not `expandMsgOutput` (128 bytes) func checkBLSHasher(hasher hash.Hasher) error { if hasher == nil { - return errNilHasher + return internal.ErrNilHasher } - if hasher.Size() != expandMsgOutput { - return invalidHasherSizeErrorf("hasher's size needs to be %d, got %d", expandMsgOutput, hasher.Size()) + if hasher.Size() != bls12.ExpandMsgOutput { + return internal.InvalidHasherSizeErrorf("hasher's size needs to be %d, got %d", bls12.ExpandMsgOutput, hasher.Size()) } return nil } @@ -157,7 +171,7 @@ func checkBLSHasher(hasher hash.Hasher) error { // - (false, errNilHasher) if a hasher is nil // - (false, invalidHasherSizeError) if a hasher's output size is not 128 bytes // - (signature, nil) otherwise -func (sk *prKeyBLSBLS12381) Sign(data []byte, kmac hash.Hasher) (Signature, error) { +func (sk *prKeyBLSBLS12381) Sign(data []byte, kmac hash.Hasher) (sign.Signature, error) { // sanity check of input hasher err := checkBLSHasher(kmac) if err != nil { @@ -168,10 +182,12 @@ func (sk *prKeyBLSBLS12381) Sign(data []byte, kmac hash.Hasher) (Signature, erro h := kmac.ComputeHash(data) s := make([]byte, SignatureLenBLSBLS12381) - C.bls_sign((*C.uchar)(&s[0]), - (*C.Fr)(&sk.scalar), + C.bls_sign( + (*C.uchar)(&s[0]), + (*C.Fr)(unsafe.Pointer(&sk.scalar)), (*C.uchar)(&h[0]), - (C.int)(len(h))) + (C.int)(len(h)), + ) return s, nil } @@ -194,7 +210,7 @@ func (sk *prKeyBLSBLS12381) Sign(data []byte, kmac hash.Hasher) (Signature, erro // - (false, invalidHasherSizeError) if a hasher's output size is not 128 bytes // - (false, error) if an unexpected error occurs // - (validity, nil) otherwise -func (pk *pubKeyBLSBLS12381) Verify(s Signature, data []byte, kmac hash.Hasher) (bool, error) { +func (pk *pubKeyBLSBLS12381) Verify(s sign.Signature, data []byte, kmac hash.Hasher) (bool, error) { // check of input hasher err := checkBLSHasher(kmac) if err != nil { @@ -213,15 +229,17 @@ func (pk *pubKeyBLSBLS12381) Verify(s Signature, data []byte, kmac hash.Hasher) return false, nil } - verif := C.bls_verify((*C.E2)(&pk.point), + verif := C.bls_verify( + (*C.E2)(unsafe.Pointer(&pk.point)), (*C.uchar)(&s[0]), (*C.uchar)(&h[0]), - (C.int)(len(h))) + (C.int)(len(h)), + ) switch verif { - case invalid: + case bls12.Invalid: return false, nil - case valid: + case bls12.Valid: return true, nil default: return false, fmt.Errorf("signature verification failed: code %d", verif) @@ -236,11 +254,11 @@ func (pk *pubKeyBLSBLS12381) Verify(s Signature, data []byte, kmac hash.Hasher) // This identity check is useful when an aggregated signature is // suspected to be equal to identity, which avoids failing the aggregated // signature verification. -func IsBLSSignatureIdentity(s Signature) bool { - return bytes.Equal(s, g1Serialization) +func IsBLSSignatureIdentity(s sign.Signature) bool { + return bytes.Equal(s, bls12.G1Serialization) } -// generatePrivateKey deterministically generates a private key for BLS on BLS12-381 curve. +// GeneratePrivateKey deterministically generates a private key for BLS on BLS12-381 curve. // The minimum size of the input seed is 32 bytes. // // It is recommended to use a secure crypto RNG to generate the seed. @@ -248,11 +266,11 @@ func IsBLSSignatureIdentity(s Signature) bool { // // The generated private key (resp. its corresponding public key) is guaranteed // to not be equal to the identity element of Z_r (resp. G2). -func (a *blsBLS12381Algo) generatePrivateKey(ikm []byte) (PrivateKey, error) { - if len(ikm) < KeyGenSeedMinLen || len(ikm) > KeyGenSeedMaxLen { - return nil, invalidInputsErrorf( +func (a *blsBLS12381Algo) GeneratePrivateKey(ikm []byte) (sign.PrivateKey, error) { + if len(ikm) < sign.KeyGenSeedMinLen || len(ikm) > sign.KeyGenSeedMaxLen { + return nil, common.InvalidInputsErrorf( "seed length should be at least %d bytes and at most %d bytes", - KeyGenSeedMinLen, KeyGenSeedMaxLen) + sign.KeyGenSeedMinLen, sign.KeyGenSeedMaxLen) } // HKDF parameters @@ -268,12 +286,12 @@ func (a *blsBLS12381Algo) generatePrivateKey(ikm []byte) (PrivateKey, error) { // L is the OKM length // L = ceil((3 * ceil(log2(r))) / 16) which makes L (security_bits/8)-larger than r size - okmLength := (3 * frBytesLen) / 2 + okmLength := (3 * bls12.FrBytesLen) / 2 // HKDF secret = IKM || I2OSP(0, 1) secret := make([]byte, len(ikm)+1) copy(secret, ikm) - defer overwrite(secret) // overwrite secret + defer internal.Overwrite(secret) // overwrite secret // HKDF info = key_info || I2OSP(L, 2) keyInfo := []byte{} // use empty key diversifier. TODO: update header to accept input identifier info := string(append(keyInfo, byte(okmLength>>8), byte(okmLength))) @@ -285,11 +303,11 @@ func (a *blsBLS12381Algo) generatePrivateKey(ikm []byte) (PrivateKey, error) { if err != nil { return nil, fmt.Errorf("HKDF computation failed: %w", err) } - defer overwrite(okm) // overwrite okm + defer internal.Overwrite(okm) // overwrite okm // map the bytes to a private key using modular reduction // SK = OS2IP(OKM) mod r - isZero := mapToFr(&sk.scalar, okm) + isZero := bls12.MapToFr(&sk.scalar, okm) if !isZero { return sk, nil } @@ -308,61 +326,67 @@ const invalidBLSSignatureHeader = byte(0xE0) // // The signature bytes represent an invalid serialization of a point which // makes the verification fail early. The verification would return (false, nil). -func BLSInvalidSignature() Signature { +func BLSInvalidSignature() sign.Signature { signature := make([]byte, SignatureLenBLSBLS12381) signature[0] = invalidBLSSignatureHeader // invalid header as per the Zcash serialization return signature } -// decodePrivateKey decodes a slice of bytes into a private key. +// DecodePrivateKey decodes a slice of bytes into a private key. // Decoding assumes a bytes big endian format. // It checks the scalar is non-zero and is less than the group order. -func (a *blsBLS12381Algo) decodePrivateKey(privateKeyBytes []byte) (PrivateKey, error) { +func (a *blsBLS12381Algo) DecodePrivateKey(privateKeyBytes []byte) (sign.PrivateKey, error) { sk := newPrKeyBLSBLS12381(nil) - err := readScalarFrStar(&sk.scalar, privateKeyBytes) + err := bls12.ReadScalarFrStar(&sk.scalar, privateKeyBytes) if err != nil { return nil, fmt.Errorf("failed to read the private key: %w", err) } return sk, nil } -// decodePublicKey decodes a slice of bytes into a public key. +// DecodePublicKey decodes a slice of bytes into a public key. // This function includes a membership check in G2. // // Note the function does not reject the infinity point (identity element of G2). // However, the comparison to identity is cached in the [PublicKey] structure for // a faster check during signature verifications. Any verification against an identity // public key outputs `false`. -func (a *blsBLS12381Algo) decodePublicKey(publicKeyBytes []byte) (PublicKey, error) { +func (a *blsBLS12381Algo) DecodePublicKey(publicKeyBytes []byte) (sign.PublicKey, error) { if len(publicKeyBytes) != PubKeyLenBLSBLS12381 { - return nil, invalidInputsErrorf("input length must be %d, got %d", + return nil, internal.InvalidInputsErrorf("input length must be %d, got %d", PubKeyLenBLSBLS12381, len(publicKeyBytes)) } + var pk pubKeyBLSBLS12381 - err := readPointE2(&pk.point, publicKeyBytes) + err := bls12.ReadPointE2(&pk.point, publicKeyBytes) if err != nil { return nil, fmt.Errorf("decode public key failed: %w", err) } // membership check in G2 - if !bool(C.E2_in_G2((*C.E2)(&pk.point))) { - return nil, invalidInputsErrorf("input key is infinity or does not encode a BLS12-381 point in the valid group") + if !pk.point.CheckMembershipG2() { + return nil, common.InvalidInputsErrorf("input key is infinity or does not encode a BLS12-381 point in the valid group") } // check point is non-infinity and cache it - pk.isIdentity = (&pk.point).isInfinity() + pk.isIdentity = (&pk.point).IsInfinity() return &pk, nil } -// decodePublicKeyCompressed decodes a slice of bytes into a public key. -// since we use the compressed representation by default, this checks the default and delegates to decodePublicKeyCompressed -func (a *blsBLS12381Algo) decodePublicKeyCompressed(publicKeyBytes []byte) (PublicKey, error) { - if !isG2Compressed() { +// DecodePublicKeyCompressed decodes a slice of bytes into a public key. +// since we use the compressed representation by default, this checks the default and delegates to DecodePublicKeyCompressed +func (a *blsBLS12381Algo) DecodePublicKeyCompressed(publicKeyBytes []byte) (sign.PublicKey, error) { + if !bls12.IsG2Compressed() { panic("library is not configured to use compressed public key serialization") } - return a.decodePublicKey(publicKeyBytes) + return a.DecodePublicKey(publicKeyBytes) +} + +// SignatureFormatCheck checks if the signature has the correct format. +func (a *blsBLS12381Algo) SignatureFormatCheck(sig sign.Signature) (bool, error) { + panic(fmt.Sprintf("%s does not support signature format check", a.algo)) } // prKeyBLSBLS12381 is the private key of BLS using BLS12_381, it implements PrivateKey @@ -370,15 +394,15 @@ type prKeyBLSBLS12381 struct { // public key pk *pubKeyBLSBLS12381 // private key data - scalar scalar + scalar bls12.Scalar } -var _ PrivateKey = (*prKeyBLSBLS12381)(nil) +var _ sign.PrivateKey = (*prKeyBLSBLS12381)(nil) // newPrKeyBLSBLS12381 creates a new BLS private key with the given scalar. // If no scalar is provided, the function allocates an // empty scalar. -func newPrKeyBLSBLS12381(x *scalar) *prKeyBLSBLS12381 { +func newPrKeyBLSBLS12381(x *bls12.Scalar) *prKeyBLSBLS12381 { if x != nil { return &prKeyBLSBLS12381{ // the embedded public key is only computed when needed @@ -389,8 +413,8 @@ func newPrKeyBLSBLS12381(x *scalar) *prKeyBLSBLS12381 { } // Algorithm returns the Signing Algorithm -func (sk *prKeyBLSBLS12381) Algorithm() SigningAlgorithm { - return BLSBLS12381 +func (sk *prKeyBLSBLS12381) Algorithm() sign.SigningAlgorithm { + return sign.BLSBLS12381 } // Size returns the private key length in bytes @@ -404,16 +428,16 @@ func (sk *prKeyBLSBLS12381) Size() int { func (sk *prKeyBLSBLS12381) computePublicKey() { var newPk pubKeyBLSBLS12381 // compute public key pk = g2^sk - generatorScalarMultG2(&newPk.point, &sk.scalar) + bls12.GeneratorScalarMultG2(&newPk.point, &sk.scalar) // cache the identity comparison - newPk.isIdentity = (&sk.scalar).isZero() + newPk.isIdentity = (&sk.scalar).IsZero() sk.pk = &newPk } // PublicKey returns the public key corresponding to the private key -func (sk *prKeyBLSBLS12381) PublicKey() PublicKey { +func (sk *prKeyBLSBLS12381) PublicKey() sign.PublicKey { if sk.pk != nil { return sk.pk } @@ -424,18 +448,18 @@ func (sk *prKeyBLSBLS12381) PublicKey() PublicKey { // Encode returns a byte encoding of the private key. // The encoding is a raw encoding in big endian padded to the group order func (a *prKeyBLSBLS12381) Encode() []byte { - dest := make([]byte, frBytesLen) - writeScalar(dest, &a.scalar) + dest := make([]byte, bls12.FrBytesLen) + bls12.WriteScalar(dest, &a.scalar) return dest } // Equals checks is two public keys are equal. -func (sk *prKeyBLSBLS12381) Equals(other PrivateKey) bool { +func (sk *prKeyBLSBLS12381) Equals(other sign.PrivateKey) bool { otherBLS, ok := other.(*prKeyBLSBLS12381) if !ok { return false } - return (&sk.scalar).equals(&otherBLS.scalar) + return (&sk.scalar).Equals(&otherBLS.scalar) } // String returns the hex string representation of the key. @@ -456,32 +480,32 @@ type pubKeyBLSBLS12381 struct { // sure the comparison is performed after an instance is created. // // public key G2 point - point pointE2 + point bls12.PointE2 // G2 identity check cache isIdentity bool } -var _ PublicKey = (*pubKeyBLSBLS12381)(nil) +var _ sign.PublicKey = (*pubKeyBLSBLS12381)(nil) // newPubKeyBLSBLS12381 creates a new BLS public key with the given point. // If no scalar is provided, the function allocates an // empty scalar. -func newPubKeyBLSBLS12381(p *pointE2) *pubKeyBLSBLS12381 { +func newPubKeyBLSBLS12381(p *bls12.PointE2) *pubKeyBLSBLS12381 { if p != nil { key := &pubKeyBLSBLS12381{ point: *p, } // cache the identity comparison for a faster check // during signature verifications - key.isIdentity = p.isInfinity() + key.isIdentity = p.IsInfinity() return key } return &pubKeyBLSBLS12381{} } // Algorithm returns the Signing Algorithm -func (pk *pubKeyBLSBLS12381) Algorithm() SigningAlgorithm { - return BLSBLS12381 +func (pk *pubKeyBLSBLS12381) Algorithm() sign.SigningAlgorithm { + return sign.BLSBLS12381 } // Size returns the public key lengh in bytes @@ -493,7 +517,7 @@ func (pk *pubKeyBLSBLS12381) Size() int { // The encoding is a compressed encoding of the point // [zcash] https://www.ietf.org/archive/id/draft-irtf-cfrg-pairing-friendly-curves-08.html#name-zcash-serialization-format- func (a *pubKeyBLSBLS12381) EncodeCompressed() []byte { - if !isG2Compressed() { + if !bls12.IsG2Compressed() { panic("library is not configured to use compressed public key serialization") } return a.Encode() @@ -504,18 +528,18 @@ func (a *pubKeyBLSBLS12381) EncodeCompressed() []byte { // // The function should evolve in the future to support uncompressed compresion too. func (a *pubKeyBLSBLS12381) Encode() []byte { - dest := make([]byte, g2BytesLen) - writePointE2(dest, &a.point) + dest := make([]byte, bls12.G2BytesLen) + bls12.WritePointE2(dest, &a.point) return dest } // Equals checks is two public keys are equal -func (pk *pubKeyBLSBLS12381) Equals(other PublicKey) bool { +func (pk *pubKeyBLSBLS12381) Equals(other sign.PublicKey) bool { otherBLS, ok := other.(*pubKeyBLSBLS12381) if !ok { return false } - return pk.point.equals(&otherBLS.point) + return pk.point.Equals(&otherBLS.point) } // String returns the hex string representation of the key. @@ -528,21 +552,23 @@ func (pk *pubKeyBLSBLS12381) String() string { // // The function is in this file because cgo can't be used in go test files. // TODO: implement a hasher for XMD SHA256 and use the `Sign` function. -func (sk *prKeyBLSBLS12381) signWithXMDSHA256(data []byte) Signature { +func (sk *prKeyBLSBLS12381) signWithXMDSHA256(data []byte) sign.Signature { dst := []byte("BLS_SIG_BLS12381G1_XMD:SHA-256_SSWU_RO_NUL_") - hash := make([]byte, expandMsgOutput) + hash := make([]byte, bls12.ExpandMsgOutput) // XMD using SHA256 C.xmd_sha256((*C.uchar)(&hash[0]), - (C.int)(expandMsgOutput), + (C.int)(bls12.ExpandMsgOutput), (*C.uchar)(&data[0]), (C.int)(len(data)), (*C.uchar)(&dst[0]), (C.int)(len(dst))) // sign the hash s := make([]byte, SignatureLenBLSBLS12381) - C.bls_sign((*C.uchar)(&s[0]), - (*C.Fr)(&sk.scalar), + C.bls_sign( + (*C.uchar)(&s[0]), + (*C.Fr)(unsafe.Pointer(&sk.scalar)), (*C.uchar)(&hash[0]), - (C.int)(len(hash))) + (C.int)(len(hash)), + ) return s } diff --git a/bls_core.c b/sign/bls/bls_core.c similarity index 100% rename from bls_core.c rename to sign/bls/bls_core.c diff --git a/bls_crossBLST_test.go b/sign/bls/bls_crossBLST_test.go similarity index 83% rename from bls_crossBLST_test.go rename to sign/bls/bls_crossBLST_test.go index 3919863c..4341a1c3 100644 --- a/bls_crossBLST_test.go +++ b/sign/bls/bls_crossBLST_test.go @@ -19,7 +19,7 @@ * limitations under the License. */ -package crypto +package bls // This file contains tests against the library BLST (https://github.com/supranational/blst). // The purpose of these tests is to detect differences with a different implementation of BLS on the BLS12-381 @@ -41,13 +41,15 @@ import ( "github.com/stretchr/testify/require" "pgregory.net/rapid" + bls12 "github.com/onflow/crypto/internal/bls12381" "github.com/onflow/crypto/internal/blst" + "github.com/onflow/crypto/sign" ) // validPrivateKeyBytesFlow generates bytes of a valid private key in Flow library func validPrivateKeyBytesFlow(t *rapid.T) []byte { - seed := rapid.SliceOfN(rapid.Byte(), KeyGenSeedMinLen, KeyGenSeedMaxLen).Draw(t, "seed").([]byte) - sk, err := GeneratePrivateKey(BLSBLS12381, seed) + seed := rapid.SliceOfN(rapid.Byte(), sign.KeyGenSeedMinLen, sign.KeyGenSeedMaxLen).Draw(t, "seed").([]byte) + sk, err := sign.GeneratePrivateKey(sign.BLSBLS12381, seed) // TODO: require.NoError(t, err) seems to mess with rapid if err != nil { assert.FailNow(t, "failed key generation") @@ -57,16 +59,16 @@ func validPrivateKeyBytesFlow(t *rapid.T) []byte { // validPublicKeyBytesFlow generates bytes of a valid public key in Flow library func validPublicKeyBytesFlow(t *rapid.T) []byte { - seed := rapid.SliceOfN(rapid.Byte(), KeyGenSeedMinLen, KeyGenSeedMaxLen).Draw(t, "seed").([]byte) - sk, err := GeneratePrivateKey(BLSBLS12381, seed) + seed := rapid.SliceOfN(rapid.Byte(), sign.KeyGenSeedMinLen, sign.KeyGenSeedMaxLen).Draw(t, "seed").([]byte) + sk, err := sign.GeneratePrivateKey(sign.BLSBLS12381, seed) require.NoError(t, err) return sk.PublicKey().Encode() } // validSignatureBytesFlow generates bytes of a valid signature in Flow library func validSignatureBytesFlow(t *rapid.T) []byte { - seed := rapid.SliceOfN(rapid.Byte(), KeyGenSeedMinLen, KeyGenSeedMaxLen).Draw(t, "seed").([]byte) - sk, err := GeneratePrivateKey(BLSBLS12381, seed) + seed := rapid.SliceOfN(rapid.Byte(), sign.KeyGenSeedMinLen, sign.KeyGenSeedMaxLen).Draw(t, "seed").([]byte) + sk, err := sign.GeneratePrivateKey(sign.BLSBLS12381, seed) require.NoError(t, err) hasher := NewExpandMsgXOFKMAC128("random_tag") message := rapid.SliceOfN(rapid.Byte(), 1, 1000).Draw(t, "msg").([]byte) @@ -77,14 +79,14 @@ func validSignatureBytesFlow(t *rapid.T) []byte { // validPrivateKeyBytesBLST generates bytes of a valid private key in BLST library func validPrivateKeyBytesBLST(t *rapid.T) []byte { - randomSlice := rapid.SliceOfN(rapid.Byte(), KeyGenSeedMinLen, KeyGenSeedMaxLen) + randomSlice := rapid.SliceOfN(rapid.Byte(), sign.KeyGenSeedMinLen, sign.KeyGenSeedMaxLen) ikm := randomSlice.Draw(t, "ikm").([]byte) return blst.KeyGen(ikm).Serialize() } // validPublicKeyBytesBLST generates bytes of a valid public key in BLST library func validPublicKeyBytesBLST(t *rapid.T) []byte { - ikm := rapid.SliceOfN(rapid.Byte(), KeyGenSeedMinLen, KeyGenSeedMaxLen).Draw(t, "ikm").([]byte) + ikm := rapid.SliceOfN(rapid.Byte(), sign.KeyGenSeedMinLen, sign.KeyGenSeedMaxLen).Draw(t, "ikm").([]byte) blstS := blst.KeyGen(ikm) blstG2 := new(blst.P2Affine).From(blstS) return blstG2.Compress() @@ -92,7 +94,7 @@ func validPublicKeyBytesBLST(t *rapid.T) []byte { // validSignatureBytesBLST generates bytes of a valid signature in BLST library func validSignatureBytesBLST(t *rapid.T) []byte { - ikm := rapid.SliceOfN(rapid.Byte(), KeyGenSeedMinLen, KeyGenSeedMaxLen).Draw(t, "ikm").([]byte) + ikm := rapid.SliceOfN(rapid.Byte(), sign.KeyGenSeedMinLen, sign.KeyGenSeedMaxLen).Draw(t, "ikm").([]byte) blstS := blst.KeyGen(ikm[:]) blstG1 := new(blst.P1Affine).From(blstS) return blstG1.Compress() @@ -108,7 +110,7 @@ func testEncodeDecodePrivateKeyCrossBLST(t *rapid.T) { skBytes := rapid.OneOf(randomSlice, validSliceFlow, validSliceBLST).Example().([]byte) // check decoding results are consistent - skFlow, err := DecodePrivateKey(BLSBLS12381, skBytes) + skFlow, err := sign.DecodePrivateKey(sign.BLSBLS12381, skBytes) var skBLST blst.Scalar res := skBLST.Deserialize(skBytes) @@ -135,7 +137,7 @@ func testEncodeDecodePublicKeyCrossBLST(t *rapid.T) { pkBytes := rapid.OneOf(randomSlice, validSliceFlow, validSliceBLST).Example().([]byte) // check decoding results are consistent - pkFlow, err := DecodePublicKey(BLSBLS12381, pkBytes) + pkFlow, err := sign.DecodePublicKey(sign.BLSBLS12381, pkBytes) var pkBLST blst.P2Affine res := pkBLST.Deserialize(pkBytes) pkValidBLST := pkBLST.KeyValidate() @@ -155,16 +157,16 @@ func testEncodeDecodePublicKeyCrossBLST(t *rapid.T) { // testEncodeDecodeG1CrossBLST tests encoding and decoding of G1 points are consistent with BLST. // This test assumes signature serialization is identical to BLST. func testEncodeDecodeG1CrossBLST(t *rapid.T) { - randomSlice := rapid.SliceOfN(rapid.Byte(), g1BytesLen, g1BytesLen) + randomSlice := rapid.SliceOfN(rapid.Byte(), bls12.G1BytesLen, bls12.G1BytesLen) validSignatureFlow := rapid.Custom(validSignatureBytesFlow) validSignatureBLST := rapid.Custom(validSignatureBytesBLST) // sigBytes are bytes of either a valid serialization of a E1/G1 point, or random bytes sigBytes := rapid.OneOf(randomSlice, validSignatureFlow, validSignatureBLST).Example().([]byte) // check decoding results are consistent - var pointFlow pointE1 - err := readPointE1(&pointFlow, sigBytes) - flowPass := (err == nil) && (checkMembershipG1(&pointFlow)) + var pointFlow bls12.PointE1 + err := bls12.ReadPointE1(&pointFlow, sigBytes) + flowPass := (err == nil) && (pointFlow.CheckMembershipG1()) var pointBLST blst.P1Affine // res is non-nil iff point is in G1 @@ -175,8 +177,8 @@ func testEncodeDecodeG1CrossBLST(t *rapid.T) { // check both serializations of G1 points are equal if flowPass && blstPass { - sigFlowOutBytes := make([]byte, g1BytesLen) - writePointE1(sigFlowOutBytes, &pointFlow) + sigFlowOutBytes := make([]byte, bls12.G1BytesLen) + bls12.WritePointE1(sigFlowOutBytes, &pointFlow) sigBLSTOutBytes := pointBLST.Compress() assert.Equal(t, sigFlowOutBytes, sigBLSTOutBytes) } @@ -195,7 +197,7 @@ func testEncodeDecodeG1CrossBLST(t *rapid.T) { func testSignHashCrossBLST(t *rapid.T) { // decode two private keys from the same bytes skBytes := rapid.Custom(validPrivateKeyBytesFlow).Example().([]byte) - skFlow, err := DecodePrivateKey(BLSBLS12381, skBytes) + skFlow, err := sign.DecodePrivateKey(sign.BLSBLS12381, skBytes) require.NoError(t, err) var skBLST blst.Scalar @@ -220,9 +222,9 @@ func testSignHashCrossBLST(t *rapid.T) { } func testKeyGenCrossBLST(t *rapid.T) { - seed := rapid.SliceOfN(rapid.Byte(), KeyGenSeedMinLen, KeyGenSeedMaxLen).Draw(t, "seed").([]byte) + seed := rapid.SliceOfN(rapid.Byte(), sign.KeyGenSeedMinLen, sign.KeyGenSeedMaxLen).Draw(t, "seed").([]byte) - skFlow, err := GeneratePrivateKey(BLSBLS12381, seed) + skFlow, err := sign.GeneratePrivateKey(sign.BLSBLS12381, seed) if err != nil { assert.FailNow(t, "failed key generation") } diff --git a/bls_include.h b/sign/bls/bls_include.h similarity index 100% rename from bls_include.h rename to sign/bls/bls_include.h diff --git a/bls_test.go b/sign/bls/bls_test.go similarity index 85% rename from bls_test.go rename to sign/bls/bls_test.go index 2cf85d5a..058aa576 100644 --- a/bls_test.go +++ b/sign/bls/bls_test.go @@ -19,28 +19,33 @@ * limitations under the License. */ -package crypto +package bls import ( crand "crypto/rand" "encoding/hex" - "fmt" mrand "math/rand" "testing" "github.com/stretchr/testify/assert" "github.com/stretchr/testify/require" + "github.com/onflow/crypto/common" "github.com/onflow/crypto/hash" + "github.com/onflow/crypto/internal" + bls12 "github.com/onflow/crypto/internal/bls12381" + "github.com/onflow/crypto/sign" + _ "github.com/onflow/crypto/sign/ecdsa" + signinternal "github.com/onflow/crypto/sign/internal" ) // TestBLSMainMethods is a sanity check of main signature scheme methods (keyGen, sign, verify) func TestBLSMainMethods(t *testing.T) { // test the key generation seed lengths - testKeyGenSeed(t, BLSBLS12381, KeyGenSeedMinLen, KeyGenSeedMaxLen) + signinternal.TestKeyGenSeed(t, sign.BLSBLS12381, sign.KeyGenSeedMinLen, sign.KeyGenSeedMaxLen) // test the consistency with different inputs hasher := NewExpandMsgXOFKMAC128("test tag") - testGenSignVerify(t, BLSBLS12381, hasher) + signinternal.TestGenSignVerify(t, sign.BLSBLS12381, hasher) // specific signature test for BLS: // Test a signature with a point encoded with a coordinate x not reduced mod p. @@ -50,7 +55,7 @@ func TestBLSMainMethods(t *testing.T) { // - signature decoding only accepts reduced x-coordinates to avoid signature malleability t.Run("invalid x coordinate larger than p", func(t *testing.T) { - if !isG1Compressed() || !isG2Compressed() { + if !bls12.IsG1Compressed() || !bls12.IsG2Compressed() { t.Skip() } msg, err := hex.DecodeString("7f26ba692dc2da7ff828ef4675ff1cd6ab855fca0637b6dab295f1df8e51bc8bb1b8f0c6610aabd486cf1f098f2ddbc6691d94e10f928816f890a3d366ce46249836a595c7ea1828af52e899ba2ab627ab667113bb563918c5d5a787c414399487b4e3a7") @@ -61,7 +66,7 @@ func TestBLSMainMethods(t *testing.T) { require.NoError(t, err) pkBytes, err := hex.DecodeString("a7ac85ac8ffd9d2611f73721a93ec92115f29d769dfa425fec2e2c26ab3e4e8089a961ab430639104262723e829b75e9190a05d8fc8d22a7ac78a18473cc3df146b5c4c9c8e46d5f208039384fe2fc018321f14c01641c3afff7558a2eb06463") require.NoError(t, err) - pk, err := DecodePublicKey(BLSBLS12381, pkBytes) + pk, err := sign.DecodePublicKey(sign.BLSBLS12381, pkBytes) require.NoError(t, err) // sanity check of valid signature (P_x < p) valid, err := pk.Verify(validSig, msg, hasher) @@ -76,16 +81,16 @@ func TestBLSMainMethods(t *testing.T) { t.Run("private key equal to 1 and -1", func(t *testing.T) { sk1Bytes := make([]byte, PrKeyLenBLSBLS12381) sk1Bytes[PrKeyLenBLSBLS12381-1] = 1 - sk1, err := DecodePrivateKey(BLSBLS12381, sk1Bytes) + sk1, err := sign.DecodePrivateKey(sign.BLSBLS12381, sk1Bytes) require.NoError(t, err) skMinus1Bytes := make([]byte, PrKeyLenBLSBLS12381) - copy(skMinus1Bytes, BLS12381Order) + copy(skMinus1Bytes, bls12.BLS12381Order) skMinus1Bytes[PrKeyLenBLSBLS12381-1] -= 1 - skMinus1, err := DecodePrivateKey(BLSBLS12381, skMinus1Bytes) + skMinus1, err := sign.DecodePrivateKey(sign.BLSBLS12381, skMinus1Bytes) require.NoError(t, err) - for _, sk := range []PrivateKey{sk1, skMinus1} { + for _, sk := range []sign.PrivateKey{sk1, skMinus1} { input := make([]byte, 100) _, err = crand.Read(input) require.NoError(t, err) @@ -104,40 +109,41 @@ func TestBLSMainMethods(t *testing.T) { // Signing bench func BenchmarkBLSSingleSign(b *testing.B) { halg := NewExpandMsgXOFKMAC128("bench tag") - benchSign(b, BLSBLS12381, halg) + signinternal.BenchSign(b, sign.BLSBLS12381, halg) } // Verifying bench func BenchmarkBLSSingleVerify(b *testing.B) { halg := NewExpandMsgXOFKMAC128("bench tag") - benchVerify(b, BLSBLS12381, halg) + signinternal.BenchVerify(b, sign.BLSBLS12381, halg) } // utility function to generate a random BLS private key -func randomSK(t *testing.T, rand *mrand.Rand) PrivateKey { - seed := make([]byte, KeyGenSeedMinLen) +func randomSK(t *testing.T, rand *mrand.Rand) sign.PrivateKey { + seed := make([]byte, sign.KeyGenSeedMinLen) n, err := rand.Read(seed) - require.Equal(t, n, KeyGenSeedMinLen) + require.Equal(t, n, sign.KeyGenSeedMinLen) require.NoError(t, err) - sk, err := GeneratePrivateKey(BLSBLS12381, seed) + sk, err := sign.GeneratePrivateKey(sign.BLSBLS12381, seed) require.NoError(t, err) return sk } +/* // utility function to generate a non BLS private key -func invalidSK(t *testing.T) PrivateKey { - seed := make([]byte, KeyGenSeedMinLen) +func invalidSK(t *testing.T) sign.PrivateKey { + seed := make([]byte, sign.KeyGenSeedMinLen) n, err := crand.Read(seed) - require.Equal(t, n, KeyGenSeedMinLen) + require.Equal(t, n, sign.KeyGenSeedMinLen) require.NoError(t, err) - sk, err := GeneratePrivateKey(ECDSAP256, seed) + sk, err := sign.GeneratePrivateKey(sign.ECDSAP256, seed) require.NoError(t, err) return sk -} +}*/ // BLS tests func TestBLSBLS12381Hasher(t *testing.T) { - rand := getPRG(t) + rand := internal.GetPRG(t) // generate a key pair sk := randomSK(t, rand) sig := make([]byte, SignatureLenBLSBLS12381) @@ -147,22 +153,22 @@ func TestBLSBLS12381Hasher(t *testing.T) { t.Run("Empty hasher", func(t *testing.T) { _, err := sk.Sign(msg, nil) assert.Error(t, err) - assert.True(t, IsNilHasherError(err)) + assert.True(t, common.IsNilHasherError(err)) _, err = sk.PublicKey().Verify(sig, msg, nil) assert.Error(t, err) - assert.True(t, IsNilHasherError(err)) + assert.True(t, common.IsNilHasherError(err)) }) // short size hasher t.Run("short size hasher", func(t *testing.T) { s, err := sk.Sign(msg, hash.NewSHA2_256()) assert.Error(t, err) - assert.True(t, IsInvalidHasherSizeError(err)) + assert.True(t, common.IsInvalidHasherSizeError(err)) assert.Nil(t, s) valid, err := sk.PublicKey().Verify(sig, msg, hash.NewSHA2_256()) assert.Error(t, err) - assert.True(t, IsInvalidHasherSizeError(err)) + assert.True(t, common.IsInvalidHasherSizeError(err)) assert.False(t, valid) }) @@ -179,33 +185,33 @@ func TestBLSBLS12381Hasher(t *testing.T) { assert.GreaterOrEqual(t, len(blsSigCipherSuite), 16) assert.GreaterOrEqual(t, len(blsPOPCipherSuite), 16) }) - - t.Run("orthogonal PoP and signature hashing", func(t *testing.T) { - data := []byte("random_data") - // empty tag hasher - sigKmac := NewExpandMsgXOFKMAC128("") - h1 := sigKmac.ComputeHash(data) - - // PoP hasher - h2 := popKMAC.ComputeHash(data) - assert.NotEqual(t, h1, h2) - }) - + /* + t.Run("orthogonal PoP and signature hashing", func(t *testing.T) { + data := []byte("random_data") + // empty tag hasher + sigKmac := NewExpandMsgXOFKMAC128("") + h1 := sigKmac.ComputeHash(data) + + // PoP hasher + h2 := popKMAC.ComputeHash(data) + assert.NotEqual(t, h1, h2) + }) + */ } // TestBLSEncodeDecode tests encoding and decoding of BLS keys func TestBLSEncodeDecode(t *testing.T) { // generic tests - testEncodeDecode(t, BLSBLS12381) + signinternal.TestEncodeDecode(t, sign.BLSBLS12381) // specific tests for BLS // zero private key t.Run("zero private key", func(t *testing.T) { skBytes := make([]byte, PrKeyLenBLSBLS12381) - sk, err := DecodePrivateKey(BLSBLS12381, skBytes) + sk, err := sign.DecodePrivateKey(sign.BLSBLS12381, skBytes) require.Error(t, err, "decoding identity private key should fail") - assert.True(t, IsInvalidInputsError(err)) + assert.True(t, common.IsInvalidInputsError(err)) assert.ErrorContains(t, err, "scalar is not in the correct range") assert.Nil(t, sk) }) @@ -213,32 +219,32 @@ func TestBLSEncodeDecode(t *testing.T) { // curve group private key t.Run("group order private key", func(t *testing.T) { - sk, err := DecodePrivateKey(BLSBLS12381, BLS12381Order) + sk, err := sign.DecodePrivateKey(sign.BLSBLS12381, bls12.BLS12381Order) require.Error(t, err) - assert.True(t, IsInvalidInputsError(err)) + assert.True(t, common.IsInvalidInputsError(err)) assert.ErrorContains(t, err, "scalar is not in the correct range") assert.Nil(t, sk) }) - - // identity public key - t.Run("infinity public key", func(t *testing.T) { - // decode an identity public key - pkBytes := make([]byte, PubKeyLenBLSBLS12381) - pkBytes[0] = g2SerHeader - pk, err := DecodePublicKey(BLSBLS12381, pkBytes) - require.NoError(t, err, "decoding identity public key should succeed") - assert.True(t, pk.Equals(IdentityBLSPublicKey())) - // encode an identity public key - assert.Equal(t, pk.Encode(), pkBytes) - }) - + /* + // identity public key + t.Run("infinity public key", func(t *testing.T) { + // decode an identity public key + pkBytes := make([]byte, PubKeyLenBLSBLS12381) + pkBytes[0] = bls12.G2SerHeader + pk, err := sign.DecodePublicKey(sign.BLSBLS12381, pkBytes) + require.NoError(t, err, "decoding identity public key should succeed") + assert.True(t, pk.Equals(IdentityBLSPublicKey())) + // encode an identity public key + assert.Equal(t, pk.Encode(), pkBytes) + }) + */ // invalid point t.Run("invalid public key", func(t *testing.T) { pkBytes := make([]byte, PubKeyLenBLSBLS12381) pkBytes[0] = invalidBLSSignatureHeader - pk, err := DecodePublicKey(BLSBLS12381, pkBytes) + pk, err := sign.DecodePublicKey(sign.BLSBLS12381, pkBytes) require.Error(t, err, "the key decoding should fail - key value is invalid") - assert.True(t, IsInvalidInputsError(err)) + assert.True(t, common.IsInvalidInputsError(err)) assert.Nil(t, pk) }) @@ -252,43 +258,47 @@ func TestBLSEncodeDecode(t *testing.T) { // may implicitly rely on the property. t.Run("public key with non-reduced coordinates", func(t *testing.T) { - if !isG2Compressed() { + if !bls12.IsG2Compressed() { t.Skip() } // valid pk with x[0] < p and x[1] < p validPk, err := hex.DecodeString("818d72183e3e908af5bd6c2e37494c749b88f0396d3fbc2ba4d9ea28f1c50d1c6a540ec8fe06b6d860f72ec9363db3b8038360809700d36d761cb266af6babe9a069dc7364d3502e84536bd893d5f09ec2dd4f07cae1f8a178ffacc450f9b9a2") require.NoError(t, err) - _, err = DecodePublicKey(BLSBLS12381, validPk) + _, err = sign.DecodePublicKey(sign.BLSBLS12381, validPk) assert.NoError(t, err) // invalidpk1 with x[0]+p and same x[1] invalidPk1, err := hex.DecodeString("9B8E840277BE772540D913E47A94F94C00003BBE60C4CEEB0C0ABCC9E876034089000EC7AF5AB6D81AF62EC9363D5E63038360809700d36d761cb266af6babe9a069dc7364d3502e84536bd893d5f09ec2dd4f07cae1f8a178ffacc450f9b9a2") require.NoError(t, err) - _, err = DecodePublicKey(BLSBLS12381, invalidPk1) + _, err = sign.DecodePublicKey(sign.BLSBLS12381, invalidPk1) assert.Error(t, err) // invalidpk1 with same x[0] and x[1]+p invalidPk2, err := hex.DecodeString("818d72183e3e908af5bd6c2e37494c749b88f0396d3fbc2ba4d9ea28f1c50d1c6a540ec8fe06b6d860f72ec9363db3b81D84726AD080BA07C1385A1CF2B758C104E127F8585862EDEB843E798A86E6C2E1894F067C35F8A132FEACC450F9644D") require.NoError(t, err) - _, err = DecodePublicKey(BLSBLS12381, invalidPk2) + _, err = sign.DecodePublicKey(sign.BLSBLS12381, invalidPk2) assert.Error(t, err) }) } // TestBLSEquals tests equal for BLS keys func TestBLSEquals(t *testing.T) { - testEquals(t, BLSBLS12381, ECDSAP256) + // TODO: use a dummy algo instead of ECDSA + signinternal.TestEquals(t, sign.BLSBLS12381, sign.ECDSAP256) } // TestBLSUtils tests some utility functions func TestBLSUtils(t *testing.T) { - rand := getPRG(t) + rand := internal.GetPRG(t) // generate a key pair sk := randomSK(t, rand) - // test Algorithm() - testKeysAlgorithm(t, sk, BLSBLS12381) - // test Size() - testKeySize(t, sk, PrKeyLenBLSBLS12381, PubKeyLenBLSBLS12381) + + // test key size + signinternal.TestKeySize(t, sk, PrKeyLenBLSBLS12381, PubKeyLenBLSBLS12381) + + // test key algorithm + signinternal.TestKeysAlgorithm(t, sk, sign.BLSBLS12381) } +/* // BLS Proof of Possession test func TestBLSPOP(t *testing.T) { rand := getPRG(t) @@ -301,7 +311,7 @@ func TestBLSPOP(t *testing.T) { n, err := rand.Read(seed) require.Equal(t, n, KeyGenSeedMinLen) require.NoError(t, err) - sk, err := GeneratePrivateKey(BLSBLS12381, seed) + sk, err := sign.GeneratePrivateKey(sign.BLSBLS12381, seed) require.NoError(t, err) _, err = rand.Read(input) require.NoError(t, err) @@ -316,7 +326,7 @@ func TestBLSPOP(t *testing.T) { // test with a valid but different key seed[0] ^= 1 - wrongSk, err := GeneratePrivateKey(BLSBLS12381, seed) + wrongSk, err := sign.GeneratePrivateKey(sign.BLSBLS12381, seed) require.NoError(t, err) result, err = BLSVerifyPOP(wrongSk.PublicKey(), s) require.NoError(t, err) @@ -355,10 +365,10 @@ func TestBLSAggregateSignatures(t *testing.T) { kmac := NewExpandMsgXOFKMAC128("test tag") // number of signatures to aggregate sigsNum := rand.Intn(100) + 1 - sigs := make([]Signature, 0, sigsNum) - sks := make([]PrivateKey, 0, sigsNum) - pks := make([]PublicKey, 0, sigsNum) - var aggSig, expectedSig Signature + sigs := make([]sign.Signature, 0, sigsNum) + sks := make([]sign.PrivateKey, 0, sigsNum) + pks := make([]sign.PublicKey, 0, sigsNum) + var aggSig, expectedSig sign.Signature // create the signatures for i := 0; i < sigsNum; i++ { @@ -378,7 +388,7 @@ func TestBLSAggregateSignatures(t *testing.T) { expectedSig, err := aggSk.Sign(input, kmac) require.NoError(t, err) // aggregate signatures - aggSig, err := AggregateBLSSignatures(sigs) + aggSig, err = AggregateBLSSignatures(sigs) require.NoError(t, err) // First check: check the signatures are equal assert.Equal(t, aggSig, expectedSig) @@ -437,14 +447,14 @@ func TestBLSAggregateSignatures(t *testing.T) { // test with a signature of a wrong length shortSig := sigs[0][:SignatureLenBLSBLS12381-1] - aggSig, err = AggregateBLSSignatures([]Signature{shortSig}) + aggSig, err = AggregateBLSSignatures([]sign.Signature{shortSig}) assert.Error(t, err) assert.True(t, IsInvalidSignatureError(err)) assert.Nil(t, aggSig) // test with an invalid signature of a correct length invalidSig := BLSInvalidSignature() - aggSig, err = AggregateBLSSignatures([]Signature{invalidSig}) + aggSig, err = AggregateBLSSignatures([]sign.Signature{invalidSig}) assert.Error(t, err) assert.True(t, IsInvalidSignatureError(err)) assert.Nil(t, aggSig) @@ -457,7 +467,7 @@ func TestBLSAggregateSignatures(t *testing.T) { // test with an invalid key type sk := invalidSK(t) - aggSk, err = AggregateBLSPrivateKeys([]PrivateKey{sk}) + aggSk, err = AggregateBLSPrivateKeys([]sign.PrivateKey{sk}) assert.Error(t, err) assert.True(t, IsNotBLSKeyError(err)) assert.Nil(t, aggSk) @@ -474,8 +484,8 @@ func TestBLSAggregatePublicKeys(t *testing.T) { rand := getPRG(t) // number of keys to aggregate pkNum := rand.Intn(100) + 1 - pks := make([]PublicKey, 0, pkNum) - sks := make([]PrivateKey, 0, pkNum) + pks := make([]sign.PublicKey, 0, pkNum) + sks := make([]sign.PrivateKey, 0, pkNum) // create the signatures for i := 0; i < pkNum; i++ { @@ -516,7 +526,7 @@ func TestBLSAggregatePublicKeys(t *testing.T) { // to check that identity key is indeed the identity element with regards to aggregation. t.Run("aggregate a list that includes the identity key", func(t *testing.T) { // aggregate the identity key with a non identity key - keys := []PublicKey{pks[0], IdentityBLSPublicKey()} + keys := []sign.PublicKey{pks[0], IdentityBLSPublicKey()} aggPkWithIdentity, err := AggregateBLSPublicKeys(keys) assert.NoError(t, err) assert.True(t, aggPkWithIdentity.Equals(pks[0])) @@ -531,7 +541,7 @@ func TestBLSAggregatePublicKeys(t *testing.T) { // test with an invalid key type pk := invalidSK(t).PublicKey() - aggPK, err = AggregateBLSPublicKeys([]PublicKey{pk}) + aggPK, err = AggregateBLSPublicKeys([]sign.PublicKey{pk}) assert.Error(t, err) assert.True(t, IsNotBLSKeyError(err)) assert.Nil(t, aggPK) @@ -545,19 +555,19 @@ func TestBLSAggregatePublicKeys(t *testing.T) { groupOrderMinus1 := []byte{0x73, 0xED, 0xA7, 0x53, 0x29, 0x9D, 0x7D, 0x48, 0x33, 0x39, 0xD8, 0x08, 0x09, 0xA1, 0xD8, 0x05, 0x53, 0xBD, 0xA4, 0x02, 0xFF, 0xFE, 0x5B, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00} - sk1, err := DecodePrivateKey(BLSBLS12381, groupOrderMinus1) + sk1, err := sign.DecodePrivateKey(sign.BLSBLS12381, groupOrderMinus1) require.NoError(t, err) // sk2 is 1 one := make([]byte, PrKeyLenBLSBLS12381) one[PrKeyLenBLSBLS12381-1] = 1 - sk2, err := DecodePrivateKey(BLSBLS12381, one) + sk2, err := sign.DecodePrivateKey(sign.BLSBLS12381, one) require.NoError(t, err) // public key of aggregated private keys - aggSK, err := AggregateBLSPrivateKeys([]PrivateKey{sk1, sk2}) + aggSK, err := AggregateBLSPrivateKeys([]sign.PrivateKey{sk1, sk2}) require.NoError(t, err) assert.True(t, aggSK.PublicKey().Equals(IdentityBLSPublicKey())) // aggregated public keys - aggPK, err := AggregateBLSPublicKeys([]PublicKey{sk1.PublicKey(), sk2.PublicKey()}) + aggPK, err := AggregateBLSPublicKeys([]sign.PublicKey{sk1.PublicKey(), sk2.PublicKey()}) require.NoError(t, err) assert.True(t, aggPK.Equals(IdentityBLSPublicKey())) // check of internal identity flag @@ -575,10 +585,10 @@ func TestBLSAggregatePublicKeys(t *testing.T) { } pkBytes := pks[0].Encode() negateCompressedPoint(pkBytes) - minusPk, err := DecodePublicKey(BLSBLS12381, pkBytes) + minusPk, err := sign.DecodePublicKey(sign.BLSBLS12381, pkBytes) require.NoError(t, err) // aggregated public keys - aggPK, err := AggregateBLSPublicKeys([]PublicKey{pks[0], minusPk}) + aggPK, err := AggregateBLSPublicKeys([]sign.PublicKey{pks[0], minusPk}) require.NoError(t, err) assert.True(t, aggPK.Equals(IdentityBLSPublicKey())) // check of internal identity flag @@ -597,7 +607,7 @@ func TestBLSRemovePubKeys(t *testing.T) { rand := getPRG(t) // number of keys to aggregate pkNum := rand.Intn(100) + 1 - pks := make([]PublicKey, 0, pkNum) + pks := make([]sign.PublicKey, 0, pkNum) // generate public keys for i := 0; i < pkNum; i++ { @@ -627,7 +637,7 @@ func TestBLSRemovePubKeys(t *testing.T) { // remove an extra key and check inequality t.Run("inequality check", func(t *testing.T) { extraPk := randomSK(t, rand).PublicKey() - partialPk, err := RemoveBLSPublicKeys(aggPk, []PublicKey{extraPk}) + partialPk, err := RemoveBLSPublicKeys(aggPk, []sign.PublicKey{extraPk}) assert.NoError(t, err) BLSkey, ok := expectedPatrialPk.(*pubKeyBLSBLS12381) @@ -641,7 +651,7 @@ func TestBLSRemovePubKeys(t *testing.T) { require.NoError(t, err) // identity public key is expected randomPk := randomSK(t, rand).PublicKey() - randomPkPlusIdentityPk, err := AggregateBLSPublicKeys([]PublicKey{randomPk, identityPk}) + randomPkPlusIdentityPk, err := AggregateBLSPublicKeys([]sign.PublicKey{randomPk, identityPk}) require.NoError(t, err) BLSRandomPk, ok := randomPk.(*pubKeyBLSBLS12381) @@ -652,7 +662,7 @@ func TestBLSRemovePubKeys(t *testing.T) { // specific test with an empty slice of keys to remove t.Run("remove empty list", func(t *testing.T) { - partialPk, err := RemoveBLSPublicKeys(aggPk, []PublicKey{}) + partialPk, err := RemoveBLSPublicKeys(aggPk, []sign.PublicKey{}) require.NoError(t, err) aggBLSkey, ok := aggPk.(*pubKeyBLSBLS12381) @@ -668,7 +678,7 @@ func TestBLSRemovePubKeys(t *testing.T) { assert.True(t, IsNotBLSKeyError(err)) assert.Nil(t, partialPk) - partialPk, err = RemoveBLSPublicKeys(aggPk, []PublicKey{pk}) + partialPk, err = RemoveBLSPublicKeys(aggPk, []sign.PublicKey{pk}) assert.Error(t, err) assert.True(t, IsNotBLSKeyError(err)) assert.Nil(t, partialPk) @@ -691,8 +701,8 @@ func TestBLSBatchVerify(t *testing.T) { kmac := NewExpandMsgXOFKMAC128("test tag") // number of signatures to aggregate sigsNum := rand.Intn(100) + 2 - sigs := make([]Signature, 0, sigsNum) - pks := make([]PublicKey, 0, sigsNum) + sigs := make([]sign.Signature, 0, sigsNum) + pks := make([]sign.PublicKey, 0, sigsNum) expectedValid := make([]bool, 0, sigsNum) // create the signatures @@ -849,7 +859,7 @@ func negateCompressedPoint(pointbytes []byte) { } // alter or fix a signature -func alterSignature(s Signature) { +func alterSignature(s sign.Signature) { // this causes the signature to remain in G1 and be invalid // OR to be a non-point in G1 (either on curve or not) // which tests multiple error cases. @@ -866,15 +876,15 @@ func BenchmarkBatchVerify(b *testing.B) { // hasher kmac := NewExpandMsgXOFKMAC128("bench tag") sigsNum := 100 - sigs := make([]Signature, 0, sigsNum) - pks := make([]PublicKey, 0, sigsNum) + sigs := make([]sign.Signature, 0, sigsNum) + pks := make([]sign.PublicKey, 0, sigsNum) seed := make([]byte, KeyGenSeedMinLen) // create the signatures for i := 0; i < sigsNum; i++ { _, err := crand.Read(seed) require.NoError(b, err) - sk, err := GeneratePrivateKey(BLSBLS12381, seed) + sk, err := sign.GeneratePrivateKey(sign.BLSBLS12381, seed) require.NoError(b, err) s, err := sk.Sign(input, kmac) require.NoError(b, err) @@ -922,11 +932,11 @@ func TestBLSAggregateSignaturesManyMessages(t *testing.T) { rand := getPRG(t) // number of signatures to aggregate sigsNum := rand.Intn(40) + 1 - sigs := make([]Signature, 0, sigsNum) + sigs := make([]sign.Signature, 0, sigsNum) // number of keys (less than the number of signatures) keysNum := rand.Intn(sigsNum) + 1 - sks := make([]PrivateKey, 0, keysNum) + sks := make([]sign.PrivateKey, 0, keysNum) // generate the keys for i := 0; i < keysNum; i++ { sk := randomSK(t, rand) @@ -942,7 +952,7 @@ func TestBLSAggregateSignaturesManyMessages(t *testing.T) { } inputMsgs := make([][]byte, 0, sigsNum) - inputPks := make([]PublicKey, 0, sigsNum) + inputPks := make([]sign.PublicKey, 0, sigsNum) inputKmacs := make([]hash.Hasher, 0, sigsNum) // create the signatures @@ -963,7 +973,7 @@ func TestBLSAggregateSignaturesManyMessages(t *testing.T) { inputMsgs = append(inputMsgs, msg) inputKmacs = append(inputKmacs, kmac) } - var aggSig Signature + var aggSig sign.Signature t.Run("correctness check", func(t *testing.T) { // aggregate signatures @@ -1037,9 +1047,9 @@ func TestBLSAggregateSignaturesManyMessages(t *testing.T) { prg := getPRG(t) // number of signatures to aggregate N := 100 - sigs := make([]Signature, 0, N) + sigs := make([]sign.Signature, 0, N) msgs := make([][]byte, 0, N) - pks := make([]PublicKey, 0, N) + pks := make([]sign.PublicKey, 0, N) kmacs := make([]hash.Hasher, 0, N) kmac := NewExpandMsgXOFKMAC128("test tag") for i := 0; i < N; i++ { @@ -1106,11 +1116,11 @@ func BenchmarkVerifySignatureManyMessages(b *testing.B) { // inputs sigsNum := 100 inputKmacs := make([]hash.Hasher, 0, sigsNum) - sigs := make([]Signature, 0, sigsNum) - pks := make([]PublicKey, 0, sigsNum) + sigs := make([]sign.Signature, 0, sigsNum) + pks := make([]sign.PublicKey, 0, sigsNum) inputMsgs := make([][]byte, 0, sigsNum) kmac := NewExpandMsgXOFKMAC128("bench tag") - seed := make([]byte, KeyGenSeedMinLen) + seed := make([]byte, sign.KeyGenSeedMinLen) // create the signatures for i := 0; i < sigsNum; i++ { @@ -1120,7 +1130,7 @@ func BenchmarkVerifySignatureManyMessages(b *testing.B) { _, err = crand.Read(seed) require.NoError(b, err) - sk, err := GeneratePrivateKey(BLSBLS12381, seed) + sk, err := sign.GeneratePrivateKey(sign.BLSBLS12381, seed) require.NoError(b, err) s, err := sk.Sign(input, kmac) require.NoError(b, err) @@ -1144,22 +1154,22 @@ func BenchmarkVerifySignatureManyMessages(b *testing.B) { // Bench of all aggregation functions func BenchmarkAggregate(b *testing.B) { - seed := make([]byte, KeyGenSeedMinLen) + seed := make([]byte, sign.KeyGenSeedMinLen) // random message input := make([]byte, 100) _, _ = crand.Read(input) // hasher kmac := NewExpandMsgXOFKMAC128("bench tag") sigsNum := 1000 - sigs := make([]Signature, 0, sigsNum) - sks := make([]PrivateKey, 0, sigsNum) - pks := make([]PublicKey, 0, sigsNum) + sigs := make([]sign.Signature, 0, sigsNum) + sks := make([]sign.PrivateKey, 0, sigsNum) + pks := make([]sign.PublicKey, 0, sigsNum) // create the signatures for i := 0; i < sigsNum; i++ { _, err := crand.Read(seed) require.NoError(b, err) - sk, err := GeneratePrivateKey(BLSBLS12381, seed) + sk, err := sign.GeneratePrivateKey(sign.BLSBLS12381, seed) require.NoError(b, err) s, err := sk.Sign(input, kmac) if err != nil { @@ -1225,7 +1235,7 @@ func TestBLSIdentity(t *testing.T) { oppositeSig := make([]byte, SignatureLenBLSBLS12381) copy(oppositeSig, sig) negateCompressedPoint(oppositeSig) - aggSig, err := AggregateBLSSignatures([]Signature{sig, oppositeSig}) + aggSig, err := AggregateBLSSignatures([]sign.Signature{sig, oppositeSig}) require.NoError(t, err) assert.True(t, IsBLSSignatureIdentity(aggSig)) }) @@ -1238,15 +1248,15 @@ func TestBLSIdentity(t *testing.T) { assert.NoError(t, err) assert.False(t, valid) - valid, err = VerifyBLSSignatureOneMessage([]PublicKey{idPk}, identitySig, msg, hasher) + valid, err = VerifyBLSSignatureOneMessage([]sign.PublicKey{idPk}, identitySig, msg, hasher) assert.NoError(t, err) assert.False(t, valid) - valid, err = VerifyBLSSignatureManyMessages([]PublicKey{idPk}, identitySig, [][]byte{msg}, []hash.Hasher{hasher}) + valid, err = VerifyBLSSignatureManyMessages([]sign.PublicKey{idPk}, identitySig, [][]byte{msg}, []hash.Hasher{hasher}) assert.NoError(t, err) assert.False(t, valid) - validSlice, err := BatchVerifyBLSSignaturesOneMessage([]PublicKey{idPk}, []Signature{identitySig}, msg, hasher) + validSlice, err := BatchVerifyBLSSignaturesOneMessage([]sign.PublicKey{idPk}, []sign.Signature{identitySig}, msg, hasher) assert.NoError(t, err) assert.False(t, validSlice[0]) @@ -1255,7 +1265,7 @@ func TestBLSIdentity(t *testing.T) { assert.False(t, valid) }) } - +*/ // TestBLSKeyGenerationBreakingChange detects if the deterministic key generation // changes behaviors (same seed outputs a different key than before) func TestBLSKeyGenerationBreakingChange(t *testing.T) { @@ -1264,7 +1274,7 @@ func TestBLSKeyGenerationBreakingChange(t *testing.T) { // key generation seedBytes, err := hex.DecodeString(seed) require.NoError(t, err) - sk, err := GeneratePrivateKey(BLSBLS12381, seedBytes) + sk, err := sign.GeneratePrivateKey(sign.BLSBLS12381, seedBytes) require.NoError(t, err) // test change assert.Equal(t, expectedSK, sk.String()) diff --git a/ecdsa.go b/sign/ecdsa/ecdsa.go similarity index 80% rename from ecdsa.go rename to sign/ecdsa/ecdsa.go index 091dc4b9..67f36fa8 100644 --- a/ecdsa.go +++ b/sign/ecdsa/ecdsa.go @@ -16,7 +16,7 @@ * limitations under the License. */ -package crypto +package ecdsa // Elliptic Curve Digital Signature Algorithm is implemented as // defined in FIPS 186-4 (although the hash functions implemented in this package are SHA2 and SHA3). @@ -38,6 +38,8 @@ import ( "github.com/btcsuite/btcd/btcec/v2" "github.com/onflow/crypto/hash" + "github.com/onflow/crypto/internal" + "github.com/onflow/crypto/sign" ) const ( @@ -59,16 +61,26 @@ type ecdsaAlgo struct { // elliptic curve curve elliptic.Curve // the signing algo and parameters - algo SigningAlgorithm + algo sign.SigningAlgorithm } -// ECDSA contexts for each supported curve -// -// NIST P-256 curve -var p256Instance *ecdsaAlgo +type EcdsaAlgo = ecdsaAlgo -// SECG secp256k1 curve https://www.secg.org/sec2-v2.pdf -var secp256k1Instance *ecdsaAlgo +func init() { + // register ECDSA contexts for each supported curve in the `sign` package + if err := sign.RegisterSigner(sign.ECDSAP256, &ecdsaAlgo{ + curve: elliptic.P256(), + algo: sign.ECDSAP256, + }); err != nil { + panic(err) + } + if err := sign.RegisterSigner(sign.ECDSASecp256k1, &ecdsaAlgo{ + curve: btcec.S256(), + algo: sign.ECDSASecp256k1, + }); err != nil { + panic(err) + } +} func bitsToBytes(bits int) int { return (bits + 7) >> 3 @@ -81,7 +93,7 @@ func bitsToBytes(bits int) int { // the system's crypto/rand, the private key and the hash. // // The caller must make sure that the hash is at least the curve order size. -func (sk *prKeyECDSA) signHash(h hash.Hash) (Signature, error) { +func (sk *prKeyECDSA) signHash(h hash.Hash) (sign.Signature, error) { r, s, err := ecdsa.Sign(rand.Reader, sk.goPrKey, h) if err != nil { return nil, fmt.Errorf("ECDSA sign failed: %w", err) @@ -108,14 +120,14 @@ func (sk *prKeyECDSA) signHash(h hash.Hash) (Signature, error) { // - (false, invalidHasherSizeError) when the hasher's output size is less than the curve order (currently 32 bytes). // - (nil, error) if an unexpected error occurs // - (signature, nil) otherwise -func (sk *prKeyECDSA) Sign(data []byte, alg hash.Hasher) (Signature, error) { +func (sk *prKeyECDSA) Sign(data []byte, alg hash.Hasher) (sign.Signature, error) { if alg == nil { - return nil, errNilHasher + return nil, internal.ErrNilHasher } // check hasher's size is at least the curve order in bytes nLen := bitsToBytes((sk.alg.curve.Params().N).BitLen()) if alg.Size() < nLen { - return nil, invalidHasherSizeErrorf( + return nil, internal.InvalidHasherSizeErrorf( "hasher's size should be at least %d, got %d", nLen, alg.Size()) } @@ -124,7 +136,7 @@ func (sk *prKeyECDSA) Sign(data []byte, alg hash.Hasher) (Signature, error) { } // verifyHash implements ECDSA signature verification -func (pk *pubKeyECDSA) verifyHash(sig Signature, h hash.Hash) (bool, error) { +func (pk *pubKeyECDSA) verifyHash(sig sign.Signature, h hash.Hash) (bool, error) { nLen := bitsToBytes((pk.alg.curve.Params().N).BitLen()) if len(sig) != 2*nLen { @@ -151,15 +163,15 @@ func (pk *pubKeyECDSA) verifyHash(sig Signature, h hash.Hash) (bool, error) { // - (false, invalidHasherSizeError) when the hasher's output size is less than the curve order (currently 32 bytes). // - (false, error) if an unexpected error occurs // - (validity, nil) otherwise -func (pk *pubKeyECDSA) Verify(sig Signature, data []byte, alg hash.Hasher) (bool, error) { +func (pk *pubKeyECDSA) Verify(sig sign.Signature, data []byte, alg hash.Hasher) (bool, error) { if alg == nil { - return false, errNilHasher + return false, internal.ErrNilHasher } // check hasher's size is at least the curve order in bytes nLen := bitsToBytes((pk.alg.curve.Params().N).BitLen()) if alg.Size() < nLen { - return false, invalidHasherSizeErrorf( + return false, internal.InvalidHasherSizeErrorf( "hasher's size should be at least %d, got %d", nLen, alg.Size()) } @@ -167,16 +179,16 @@ func (pk *pubKeyECDSA) Verify(sig Signature, data []byte, alg hash.Hasher) (bool return pk.verifyHash(sig, h) } -// signatureFormatCheck verifies the format of a serialized signature, +// SignatureFormatCheck verifies the format of a serialized signature, // regardless of messages or public keys. // If FormatCheck returns false then the input is not a valid ECDSA // signature and will fail a verification against any message and public key. -func (a *ecdsaAlgo) signatureFormatCheck(sig Signature) bool { +func (a *ecdsaAlgo) SignatureFormatCheck(sig sign.Signature) (bool, error) { N := a.curve.Params().N nLen := bitsToBytes(N.BitLen()) if len(sig) != 2*nLen { - return false + return false, nil } var r big.Int @@ -185,16 +197,16 @@ func (a *ecdsaAlgo) signatureFormatCheck(sig Signature) bool { s.SetBytes(sig[nLen:]) if r.Sign() == 0 || s.Sign() == 0 { - return false + return false, nil } if r.Cmp(N) >= 0 || s.Cmp(N) >= 0 { - return false + return false, nil } // We could also check whether r and r+N are quadratic residues modulo (p) // using Euler's criterion, but this may be too heavy for a light sanity check. - return true + return true, nil } var one = new(big.Int).SetInt64(1) @@ -241,20 +253,20 @@ func goecdsaPrivateKey(curve elliptic.Curve, d *big.Int) (*ecdsa.PrivateKey, err // `ScalarBaseMult` is not deprecated in btcec's type `KoblitzCurve` priv.PublicKey.X, priv.PublicKey.Y = btcec.S256().ScalarBaseMult(d.Bytes()) } else { - return nil, invalidInputsErrorf("the curve is not supported") + return nil, internal.InvalidInputsErrorf("the curve is not supported") } return priv, nil } -// generatePrivateKey generates a private key for ECDSA +// GeneratePrivateKey generates a private key for ECDSA // deterministically using the input seed. // // It is recommended to use a secure crypto RNG to generate the seed. // The seed must have enough entropy. -func (a *ecdsaAlgo) generatePrivateKey(seed []byte) (PrivateKey, error) { - if len(seed) < KeyGenSeedMinLen || len(seed) > KeyGenSeedMaxLen { - return nil, invalidInputsErrorf("seed byte length should be between %d and %d", - KeyGenSeedMinLen, KeyGenSeedMaxLen) +func (a *ecdsaAlgo) GeneratePrivateKey(seed []byte) (sign.PrivateKey, error) { + if len(seed) < sign.KeyGenSeedMinLen || len(seed) > sign.KeyGenSeedMaxLen { + return nil, internal.InvalidInputsErrorf("seed byte length should be between %d and %d", + sign.KeyGenSeedMinLen, sign.KeyGenSeedMaxLen) } // use HKDF to extract the seed entropy and expand it into key bytes @@ -265,14 +277,14 @@ func (a *ecdsaAlgo) generatePrivateKey(seed []byte) (PrivateKey, error) { info := "" // HKDF info // use extra 128 bits to reduce the modular reduction bias nLen := bitsToBytes((a.curve.Params().N).BitLen()) - okmLength := nLen + (securityBits / 8) + okmLength := nLen + (internal.SecurityBits / 8) // instantiate HKDF and extract okm okm, err := hkdf.Key(hashFunction, seed, salt, info, okmLength) if err != nil { return nil, fmt.Errorf("HKDF computation failed : %w", err) } - defer overwrite(okm) // overwrite okm + defer internal.Overwrite(okm) // overwrite okm sk, err := goecdsaMapKey(a.curve, okm) if err != nil { @@ -286,21 +298,21 @@ func (a *ecdsaAlgo) generatePrivateKey(seed []byte) (PrivateKey, error) { }, nil } -func (a *ecdsaAlgo) rawDecodePrivateKey(der []byte) (PrivateKey, error) { +func (a *ecdsaAlgo) rawDecodePrivateKey(der []byte) (sign.PrivateKey, error) { n := a.curve.Params().N nLen := bitsToBytes(n.BitLen()) if len(der) != nLen { - return nil, invalidInputsErrorf("input has incorrect %s key size", a.algo) + return nil, internal.InvalidInputsErrorf("input has incorrect %s key size", a.algo) } var d big.Int d.SetBytes(der) if d.Cmp(n) >= 0 { - return nil, invalidInputsErrorf("input is larger than the curve order of %s", a.algo) + return nil, internal.InvalidInputsErrorf("input is larger than the curve order of %s", a.algo) } if d.Sign() == 0 { - return nil, invalidInputsErrorf("zero private keys are not a valid %s key", a.algo) + return nil, internal.InvalidInputsErrorf("zero private keys are not a valid %s key", a.algo) } priv, err := goecdsaPrivateKey(a.curve, &d) // n > d > 0 at this point @@ -316,7 +328,7 @@ func (a *ecdsaAlgo) rawDecodePrivateKey(der []byte) (PrivateKey, error) { }, nil } -func (a *ecdsaAlgo) decodePrivateKey(der []byte) (PrivateKey, error) { +func (a *ecdsaAlgo) DecodePrivateKey(der []byte) (sign.PrivateKey, error) { return a.rawDecodePrivateKey(der) } @@ -325,12 +337,12 @@ func (a *ecdsaAlgo) decodePrivateKey(der []byte) (PrivateKey, error) { // Note that infinity point serialization isn't defined in this package so the input (or output) can never represent an infinity point. // Error Returns: // - invalidInputsError if the input is not a valid serialization of a public key on the given curve. -func (a *ecdsaAlgo) rawDecodePublicKey(der []byte) (PublicKey, error) { +func (a *ecdsaAlgo) rawDecodePublicKey(der []byte) (sign.PublicKey, error) { curve := a.curve p := (curve.Params().P) pLen := bitsToBytes(p.BitLen()) if len(der) != 2*pLen { - return nil, invalidInputsErrorf("input has incorrect %s key size, got %d, expects %d", + return nil, internal.InvalidInputsErrorf("input has incorrect %s key size, got %d, expects %d", a.algo, len(der), 2*pLen) } var x, y big.Int @@ -339,7 +351,7 @@ func (a *ecdsaAlgo) rawDecodePublicKey(der []byte) (PublicKey, error) { // check the coordinates are valid field elements if x.Cmp(p) >= 0 || y.Cmp(p) >= 0 { - return nil, invalidInputsErrorf("at least one coordinate is larger than the field prime for %s", a.algo) + return nil, internal.InvalidInputsErrorf("at least one coordinate is larger than the field prime for %s", a.algo) } // all the curves supported for now have a cofactor equal to 1, @@ -356,15 +368,15 @@ func (a *ecdsaAlgo) rawDecodePublicKey(der []byte) (PublicKey, error) { _, err := ecdh.P256().NewPublicKey(ecdhPubBytes) if err != nil { - return nil, invalidInputsErrorf("input is not a point on curve P-256: %w", err) + return nil, internal.InvalidInputsErrorf("input is not a point on curve P-256: %w", err) } } else if curve == btcec.S256() { // `IsOnCurve` is not deprecated in btcec's type `KoblitzCurve` if !btcec.S256().IsOnCurve(&x, &y) { - return nil, invalidInputsErrorf("input is not a point on curve secp256k1") + return nil, internal.InvalidInputsErrorf("input is not a point on curve secp256k1") } } else { - return nil, invalidInputsErrorf("curve is not supported") + return nil, internal.InvalidInputsErrorf("curve is not supported") } pk := ecdsa.PublicKey{ @@ -376,11 +388,11 @@ func (a *ecdsaAlgo) rawDecodePublicKey(der []byte) (PublicKey, error) { return &pubKeyECDSA{a, &pk}, nil } -func (a *ecdsaAlgo) decodePublicKey(der []byte) (PublicKey, error) { +func (a *ecdsaAlgo) DecodePublicKey(der []byte) (sign.PublicKey, error) { return a.rawDecodePublicKey(der) } -// decodePublicKeyCompressed returns a non-infinity public key given the bytes of a compressed +// DecodePublicKeyCompressed returns a non-infinity public key given the bytes of a compressed // public key according to X9.62 section 4.3.6. // The compressed representation uses an extra byte to disambiguate sign. // Note that infinity point serialization isn't defined in this package so the input (or output) @@ -388,17 +400,17 @@ func (a *ecdsaAlgo) decodePublicKey(der []byte) (PublicKey, error) { // Error Returns: // - invalidInputsError if the curve isn't supported or the input isn't a valid key serialization // on the given curve. -func (a *ecdsaAlgo) decodePublicKeyCompressed(pkBytes []byte) (PublicKey, error) { +func (a *ecdsaAlgo) DecodePublicKeyCompressed(pkBytes []byte) (sign.PublicKey, error) { expectedLen := bitsToBytes(a.curve.Params().BitSize) + 1 if len(pkBytes) != expectedLen { - return nil, invalidInputsErrorf("input length incompatible, expected %d, got %d", expectedLen, len(pkBytes)) + return nil, internal.InvalidInputsErrorf("input length incompatible, expected %d, got %d", expectedLen, len(pkBytes)) } var goPubKey *ecdsa.PublicKey if a.curve == elliptic.P256() { x, y := elliptic.UnmarshalCompressed(a.curve, pkBytes) if x == nil { - return nil, invalidInputsErrorf("input %x isn't a compressed serialization of a %v key", pkBytes, a.algo.String()) + return nil, internal.InvalidInputsErrorf("input %x isn't a compressed serialization of a %v key", pkBytes, a.algo.String()) } goPubKey = new(ecdsa.PublicKey) goPubKey.Curve = a.curve @@ -409,12 +421,12 @@ func (a *ecdsaAlgo) decodePublicKeyCompressed(pkBytes []byte) (PublicKey, error) // use `btcec` because elliptic's `UnmarshalCompressed` doesn't work for SEC Koblitz curves pk, err := btcec.ParsePubKey(pkBytes) if err != nil { - return nil, invalidInputsErrorf("input %x isn't a compressed serialization of a %v key", pkBytes, a.algo.String()) + return nil, internal.InvalidInputsErrorf("input %x isn't a compressed serialization of a %v key", pkBytes, a.algo.String()) } // convert to a crypto/ecdsa key goPubKey = pk.ToECDSA() } else { - return nil, invalidInputsErrorf("the input curve is not supported") + return nil, internal.InvalidInputsErrorf("the input curve is not supported") } return &pubKeyECDSA{a, goPubKey}, nil } @@ -429,10 +441,10 @@ type prKeyECDSA struct { pubKey *pubKeyECDSA } -var _ PrivateKey = (*prKeyECDSA)(nil) +var _ sign.PrivateKey = (*prKeyECDSA)(nil) // Algorithm returns the algo related to the private key -func (sk *prKeyECDSA) Algorithm() SigningAlgorithm { +func (sk *prKeyECDSA) Algorithm() sign.SigningAlgorithm { return sk.alg.algo } @@ -442,7 +454,7 @@ func (sk *prKeyECDSA) Size() int { } // PublicKey returns the public key associated to the private key -func (sk *prKeyECDSA) PublicKey() PublicKey { +func (sk *prKeyECDSA) PublicKey() sign.PublicKey { // construct the public key once if sk.pubKey == nil { sk.pubKey = &pubKeyECDSA{ @@ -471,7 +483,7 @@ func (sk *prKeyECDSA) Encode() []byte { } // Equals test the equality of two private keys -func (sk *prKeyECDSA) Equals(other PrivateKey) bool { +func (sk *prKeyECDSA) Equals(other sign.PrivateKey) bool { // check the key type otherECDSA, ok := other.(*prKeyECDSA) if !ok { @@ -497,10 +509,10 @@ type pubKeyECDSA struct { goPubKey *ecdsa.PublicKey } -var _ PublicKey = (*pubKeyECDSA)(nil) +var _ sign.PublicKey = (*pubKeyECDSA)(nil) // Algorithm returns the the algo related to the private key -func (pk *pubKeyECDSA) Algorithm() SigningAlgorithm { +func (pk *pubKeyECDSA) Algorithm() sign.SigningAlgorithm { return pk.alg.algo } @@ -540,7 +552,7 @@ func (pk *pubKeyECDSA) Encode() []byte { } // Equals test the equality of two private keys -func (pk *pubKeyECDSA) Equals(other PublicKey) bool { +func (pk *pubKeyECDSA) Equals(other sign.PublicKey) bool { // check the key type otherECDSA, ok := other.(*pubKeyECDSA) if !ok { diff --git a/ecdsa_test.go b/sign/ecdsa/ecdsa_test.go similarity index 71% rename from ecdsa_test.go rename to sign/ecdsa/ecdsa_test.go index fe6c338b..e2be2b91 100644 --- a/ecdsa_test.go +++ b/sign/ecdsa/ecdsa_test.go @@ -16,7 +16,7 @@ * limitations under the License. */ -package crypto +package ecdsa import ( "encoding/hex" @@ -29,24 +29,27 @@ import ( "github.com/stretchr/testify/assert" "github.com/stretchr/testify/require" + "github.com/onflow/crypto/common" "github.com/onflow/crypto/hash" + "github.com/onflow/crypto/sign" + "github.com/onflow/crypto/sign/internal" ) -var ecdsaCurves = []SigningAlgorithm{ - ECDSAP256, - ECDSASecp256k1, +var ecdsaCurves = []sign.SigningAlgorithm{ + sign.ECDSAP256, + sign.ECDSASecp256k1, } -var ecdsaPrKeyLen = map[SigningAlgorithm]int{ - ECDSAP256: PrKeyLenECDSAP256, - ECDSASecp256k1: PrKeyLenECDSASecp256k1, +var ecdsaPrKeyLen = map[sign.SigningAlgorithm]int{ + sign.ECDSAP256: PrKeyLenECDSAP256, + sign.ECDSASecp256k1: PrKeyLenECDSASecp256k1, } -var ecdsaPubKeyLen = map[SigningAlgorithm]int{ - ECDSAP256: PubKeyLenECDSAP256, - ECDSASecp256k1: PubKeyLenECDSASecp256k1, +var ecdsaPubKeyLen = map[sign.SigningAlgorithm]int{ + sign.ECDSAP256: PubKeyLenECDSAP256, + sign.ECDSASecp256k1: PubKeyLenECDSASecp256k1, } -var ecdsaSigLen = map[SigningAlgorithm]int{ - ECDSAP256: SignatureLenECDSAP256, - ECDSASecp256k1: SignatureLenECDSASecp256k1, +var ecdsaSigLen = map[sign.SigningAlgorithm]int{ + sign.ECDSAP256: SignatureLenECDSAP256, + sign.ECDSASecp256k1: SignatureLenECDSASecp256k1, } // ECDSA tests @@ -55,10 +58,10 @@ func TestECDSA(t *testing.T) { for _, curve := range ecdsaCurves { t.Logf("Testing ECDSA for curve %s", curve) // test key generation seed limits - testKeyGenSeed(t, curve, KeyGenSeedMinLen, KeyGenSeedMaxLen) + internal.TestKeyGenSeed(t, curve, sign.KeyGenSeedMinLen, sign.KeyGenSeedMaxLen) // test consistency halg := hash.NewSHA3_256() - testGenSignVerify(t, curve, halg) + internal.TestGenSignVerify(t, curve, halg) } } @@ -75,11 +78,11 @@ func (d *dummyHasher) Reset() {} func TestECDSAHasher(t *testing.T) { for _, curve := range ecdsaCurves { // generate a key pair - seed := make([]byte, KeyGenSeedMinLen) + seed := make([]byte, sign.KeyGenSeedMinLen) n, err := crand.Read(seed) - require.Equal(t, n, KeyGenSeedMinLen) + require.Equal(t, n, sign.KeyGenSeedMinLen) require.NoError(t, err) - sk, err := GeneratePrivateKey(curve, seed) + sk, err := sign.GeneratePrivateKey(curve, seed) require.NoError(t, err) sig := make([]byte, ecdsaSigLen[curve]) @@ -87,10 +90,10 @@ func TestECDSAHasher(t *testing.T) { t.Run("Empty hasher", func(t *testing.T) { _, err := sk.Sign(seed, nil) assert.Error(t, err) - assert.True(t, IsNilHasherError(err)) + assert.True(t, common.IsNilHasherError(err)) _, err = sk.PublicKey().Verify(sig, seed, nil) assert.Error(t, err) - assert.True(t, IsNilHasherError(err)) + assert.True(t, common.IsNilHasherError(err)) }) // hasher with large output size @@ -107,10 +110,10 @@ func TestECDSAHasher(t *testing.T) { dummy := newDummyHasher(31) // 31 is one byte less than the supported curves' order _, err := sk.Sign(seed, dummy) assert.Error(t, err) - assert.True(t, IsInvalidHasherSizeError(err)) + assert.True(t, common.IsInvalidHasherSizeError(err)) _, err = sk.PublicKey().Verify(sig, seed, dummy) assert.Error(t, err) - assert.True(t, IsInvalidHasherSizeError(err)) + assert.True(t, common.IsInvalidHasherSizeError(err)) }) } } @@ -118,52 +121,52 @@ func TestECDSAHasher(t *testing.T) { // Signing bench func BenchmarkECDSAP256Sign(b *testing.B) { halg := hash.NewSHA3_256() - benchSign(b, ECDSAP256, halg) + internal.BenchSign(b, sign.ECDSAP256, halg) } // Verifying bench func BenchmarkECDSAP256Verify(b *testing.B) { halg := hash.NewSHA3_256() - benchVerify(b, ECDSAP256, halg) + internal.BenchVerify(b, sign.ECDSAP256, halg) } // Signing bench func BenchmarkECDSASecp256k1Sign(b *testing.B) { halg := hash.NewSHA3_256() - benchSign(b, ECDSASecp256k1, halg) + internal.BenchSign(b, sign.ECDSASecp256k1, halg) } // Verifying bench func BenchmarkECDSASecp256k1Verify(b *testing.B) { halg := hash.NewSHA3_256() - benchVerify(b, ECDSASecp256k1, halg) + internal.BenchVerify(b, sign.ECDSASecp256k1, halg) } // TestECDSAEncodeDecode tests encoding and decoding of ECDSA keys func TestECDSAEncodeDecode(t *testing.T) { for _, curve := range ecdsaCurves { - testEncodeDecode(t, curve) + internal.TestEncodeDecode(t, curve) // zero private key t.Run("zero private key", func(t *testing.T) { skBytes := make([]byte, ecdsaPrKeyLen[curve]) - sk, err := DecodePrivateKey(curve, skBytes) + sk, err := sign.DecodePrivateKey(curve, skBytes) require.Error(t, err, "decoding identity private key should fail") - assert.True(t, IsInvalidInputsError(err)) + assert.True(t, common.IsInvalidInputsError(err)) assert.ErrorContains(t, err, "zero private keys are not a valid") assert.Nil(t, sk) }) // group order private key t.Run("group order private key", func(t *testing.T) { - groupOrder := make(map[SigningAlgorithm]string) - groupOrder[ECDSAP256] = "FFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551" - groupOrder[ECDSASecp256k1] = "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141" + groupOrder := make(map[sign.SigningAlgorithm]string) + groupOrder[sign.ECDSAP256] = "FFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551" + groupOrder[sign.ECDSASecp256k1] = "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141" orderBytes, err := hex.DecodeString(groupOrder[curve]) require.NoError(t, err) - sk, err := DecodePrivateKey(curve, orderBytes) + sk, err := sign.DecodePrivateKey(curve, orderBytes) require.Error(t, err) - assert.True(t, IsInvalidInputsError(err)) + assert.True(t, common.IsInvalidInputsError(err)) assert.ErrorContains(t, err, "input is larger than the curve order") assert.Nil(t, sk) }) @@ -174,9 +177,9 @@ func TestECDSAEncodeDecode(t *testing.T) { // Infinity point serialization isn't defined by the package for ECDSA and can't be deserialized. t.Run("all zeros public key", func(t *testing.T) { pkBytes := make([]byte, ecdsaPubKeyLen[curve]) - pk, err := DecodePublicKey(curve, pkBytes) + pk, err := sign.DecodePublicKey(curve, pkBytes) require.Error(t, err, "point is not on curve") - assert.True(t, IsInvalidInputsError(err)) + assert.True(t, common.IsInvalidInputsError(err)) assert.ErrorContains(t, err, "input is not a point on curve") assert.Nil(t, pk) }) @@ -187,24 +190,24 @@ func TestECDSAEncodeDecode(t *testing.T) { // - public key decoding handles input x-coordinates with x and y larger than p (doesn't result in an exception) // - public key decoding only accepts reduced x and y t.Run("public key with non-reduced coordinates", func(t *testing.T) { - invalidPK1s := map[SigningAlgorithm]string{ - ECDSASecp256k1: "0000000000000000000000000000000000000000000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC30", - ECDSAP256: "FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFF0000000000000000000000000000000000000000000000000000000000000000", + invalidPK1s := map[sign.SigningAlgorithm]string{ + sign.ECDSASecp256k1: "0000000000000000000000000000000000000000000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC30", + sign.ECDSAP256: "FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFF0000000000000000000000000000000000000000000000000000000000000000", } - invalidPK2s := map[SigningAlgorithm]string{ - ECDSASecp256k1: "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F0000000000000000000000000000000000000000000000000000000000000000", - ECDSAP256: "FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFF0000000000000000000000000000000000000000000000000000000000000000", + invalidPK2s := map[sign.SigningAlgorithm]string{ + sign.ECDSASecp256k1: "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F0000000000000000000000000000000000000000000000000000000000000000", + sign.ECDSAP256: "FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFF0000000000000000000000000000000000000000000000000000000000000000", } // invalidpk1 with x >= p invalidPk1, err := hex.DecodeString(invalidPK1s[curve]) require.NoError(t, err) - _, err = DecodePublicKey(curve, invalidPk1) + _, err = sign.DecodePublicKey(curve, invalidPk1) assert.Error(t, err) assert.ErrorContains(t, err, "at least one coordinate is larger than the field prime for") // invalidpk2 with y >= p invalidPk2, err := hex.DecodeString(invalidPK2s[curve]) require.NoError(t, err) - _, err = DecodePublicKey(curve, invalidPk2) + _, err = sign.DecodePublicKey(curve, invalidPk2) assert.Error(t, err) assert.ErrorContains(t, err, "at least one coordinate is larger than the field prime for") }) @@ -214,7 +217,7 @@ func TestECDSAEncodeDecode(t *testing.T) { // TestECDSAEquals tests equal for ECDSA keys func TestECDSAEquals(t *testing.T) { for i, curve := range ecdsaCurves { - testEquals(t, curve, ecdsaCurves[i]^1) + internal.TestEquals(t, curve, ecdsaCurves[i]^1) } } @@ -222,14 +225,14 @@ func TestECDSAEquals(t *testing.T) { func TestECDSAUtils(t *testing.T) { for _, curve := range ecdsaCurves { // generate a key pair - seed := make([]byte, KeyGenSeedMinLen) + seed := make([]byte, sign.KeyGenSeedMinLen) n, err := crand.Read(seed) - require.Equal(t, n, KeyGenSeedMinLen) + require.Equal(t, n, sign.KeyGenSeedMinLen) require.NoError(t, err) - sk, err := GeneratePrivateKey(curve, seed) + sk, err := sign.GeneratePrivateKey(curve, seed) require.NoError(t, err) - testKeysAlgorithm(t, sk, curve) - testKeySize(t, sk, ecdsaPrKeyLen[curve], ecdsaPubKeyLen[curve]) + internal.TestKeysAlgorithm(t, sk, curve) + internal.TestKeySize(t, sk, ecdsaPrKeyLen[curve], ecdsaPubKeyLen[curve]) } } @@ -239,17 +242,17 @@ func TestECDSAUtils(t *testing.T) { // Derived public keys are compared against a hardcoded vector. func TestECDSAPublicKeyComputation(t *testing.T) { testVec := []struct { - curve SigningAlgorithm + curve sign.SigningAlgorithm sk string pk string }{ { - ECDSASecp256k1, + sign.ECDSASecp256k1, "6e37a39c31a05181bf77919ace790efd0bdbcaf42b5a52871fc112fceb918c95", "0x36f292f6c287b6e72ca8128465647c7f88730f84ab27a1e934dbd2da753930fa39a09ddcf3d28fb30cc683de3fc725e095ec865c3d41aef6065044cb12b1ff61", }, { - ECDSAP256, + sign.ECDSAP256, "6e37a39c31a05181bf77919ace790efd0bdbcaf42b5a52871fc112fceb918c95", "0x78a80dfe190a6068be8ddf05644c32d2540402ffc682442f6a9eeb96125d86813789f92cf4afabf719aaba79ecec54b27e33a188f83158f6dd15ecb231b49808", }, @@ -259,7 +262,7 @@ func TestECDSAPublicKeyComputation(t *testing.T) { // get the private key (the scalar) bytes, err := hex.DecodeString(test.sk) require.NoError(t, err) - sk, err := DecodePrivateKey(test.curve, bytes) + sk, err := sign.DecodePrivateKey(test.curve, bytes) require.NoError(t, err) // computed public key (base scalar point result) computedPk := sk.PublicKey().String() @@ -274,27 +277,27 @@ func TestSignatureFormatCheck(t *testing.T) { for _, curve := range ecdsaCurves { t.Run("valid signature", func(t *testing.T) { len := ecdsaSigLen[curve] - sig := Signature(make([]byte, len)) + sig := sign.Signature(make([]byte, len)) _, err := crand.Read(sig) require.NoError(t, err) sig[len/2] = 0 // force s to be less than the curve order sig[len-1] |= 1 // force s to be non zero sig[0] = 0 // force r to be less than the curve order sig[len/2-1] |= 1 // force r to be non zero - valid, err := SignatureFormatCheck(curve, sig) + valid, err := sign.SignatureFormatCheck(curve, sig) assert.Nil(t, err) assert.True(t, valid) }) t.Run("invalid length", func(t *testing.T) { len := ecdsaSigLen[curve] - shortSig := Signature(make([]byte, len/2)) - valid, err := SignatureFormatCheck(curve, shortSig) + shortSig := sign.Signature(make([]byte, len/2)) + valid, err := sign.SignatureFormatCheck(curve, shortSig) assert.Nil(t, err) assert.False(t, valid) - longSig := Signature(make([]byte, len*2)) - valid, err = SignatureFormatCheck(curve, longSig) + longSig := sign.Signature(make([]byte, len*2)) + valid, err = sign.SignatureFormatCheck(curve, longSig) assert.Nil(t, err) assert.False(t, valid) }) @@ -302,27 +305,27 @@ func TestSignatureFormatCheck(t *testing.T) { t.Run("zero values", func(t *testing.T) { // signature with a zero s len := ecdsaSigLen[curve] - sig0s := Signature(make([]byte, len)) + sig0s := sign.Signature(make([]byte, len)) _, err := crand.Read(sig0s[:len/2]) require.NoError(t, err) - valid, err := SignatureFormatCheck(curve, sig0s) + valid, err := sign.SignatureFormatCheck(curve, sig0s) assert.Nil(t, err) assert.False(t, valid) // signature with a zero r - sig0r := Signature(make([]byte, len)) + sig0r := sign.Signature(make([]byte, len)) _, err = crand.Read(sig0r[len/2:]) require.NoError(t, err) - valid, err = SignatureFormatCheck(curve, sig0r) + valid, err = sign.SignatureFormatCheck(curve, sig0r) assert.Nil(t, err) assert.False(t, valid) }) t.Run("large values", func(t *testing.T) { len := ecdsaSigLen[curve] - sigLargeS := Signature(make([]byte, len)) + sigLargeS := sign.Signature(make([]byte, len)) _, err := crand.Read(sigLargeS[:len/2]) require.NoError(t, err) // make sure s is larger than the curve order @@ -330,11 +333,11 @@ func TestSignatureFormatCheck(t *testing.T) { sigLargeS[i] = 0xFF } - valid, err := SignatureFormatCheck(curve, sigLargeS) + valid, err := sign.SignatureFormatCheck(curve, sigLargeS) assert.Nil(t, err) assert.False(t, valid) - sigLargeR := Signature(make([]byte, len)) + sigLargeR := sign.Signature(make([]byte, len)) _, err = crand.Read(sigLargeR[len/2:]) require.NoError(t, err) // make sure s is larger than the curve order @@ -342,7 +345,7 @@ func TestSignatureFormatCheck(t *testing.T) { sigLargeR[i] = 0xFF } - valid, err = SignatureFormatCheck(curve, sigLargeR) + valid, err = sign.SignatureFormatCheck(curve, sigLargeR) assert.Nil(t, err) assert.False(t, valid) }) @@ -363,7 +366,7 @@ func TestEllipticUnmarshalSecp256k1(t *testing.T) { require.NoError(t, err) // decompress, check that those are perfectly valid Secp256k1 public keys - retrieved, err := DecodePublicKeyCompressed(ECDSASecp256k1, publicBytes) + retrieved, err := sign.DecodePublicKeyCompressed(sign.ECDSASecp256k1, publicBytes) require.NoError(t, err) // check the compression is canonical by re-compressing to the same bytes @@ -381,15 +384,15 @@ func BenchmarkECDSADecode(b *testing.B) { seed := make([]byte, 50) _, _ = crand.Read(seed) - for _, curve := range []SigningAlgorithm{ECDSASecp256k1, ECDSAP256} { - sk, _ := GeneratePrivateKey(curve, seed) + for _, curve := range []sign.SigningAlgorithm{sign.ECDSASecp256k1, sign.ECDSAP256} { + sk, _ := sign.GeneratePrivateKey(curve, seed) comp := sk.PublicKey().EncodeCompressed() uncomp := sk.PublicKey().Encode() b.Run("compressed point on "+curve.String(), func(b *testing.B) { b.ResetTimer() for i := 0; i < b.N; i++ { - _, err := DecodePublicKeyCompressed(curve, comp) + _, err := sign.DecodePublicKeyCompressed(curve, comp) require.NoError(b, err) } b.StopTimer() @@ -398,7 +401,7 @@ func BenchmarkECDSADecode(b *testing.B) { b.Run("uncompressed point on "+curve.String(), func(b *testing.B) { b.ResetTimer() for i := 0; i < b.N; i++ { - _, err := DecodePublicKey(curve, uncomp) + _, err := sign.DecodePublicKey(curve, uncomp) require.NoError(b, err) } b.StopTimer() @@ -410,17 +413,17 @@ func BenchmarkECDSADecode(b *testing.B) { // changes behaviors (same seed outputs a different key than before) func TestECDSAKeyGenerationBreakingChange(t *testing.T) { testVec := []struct { - curve SigningAlgorithm + curve sign.SigningAlgorithm seed string expectedSK string }{ { - ECDSASecp256k1, + sign.ECDSASecp256k1, "00112233445566778899AABBCCDDEEFF00112233445566778899AABBCCDDEEFF", "0x4723d238a9702296f96bf64f1288c8b1eb93a4bff8b1482be4172c745bf30acb", }, { - ECDSAP256, + sign.ECDSAP256, "00112233445566778899AABBCCDDEEFF00112233445566778899AABBCCDDEEFF", "0x3cadd4123b493233252ffdeccaef07066b73e2c3a9a08905669c5a857027708b", }, @@ -431,7 +434,7 @@ func TestECDSAKeyGenerationBreakingChange(t *testing.T) { // key generation seedBytes, err := hex.DecodeString(test.seed) require.NoError(t, err) - sk, err := GeneratePrivateKey(test.curve, seedBytes) + sk, err := sign.GeneratePrivateKey(test.curve, seedBytes) require.NoError(t, err) // test change assert.Equal(t, test.expectedSK, sk.String()) diff --git a/sign_test_utils.go b/sign/internal/sign_test_utils.go similarity index 65% rename from sign_test_utils.go rename to sign/internal/sign_test_utils.go index 55789351..cde7b85f 100644 --- a/sign_test_utils.go +++ b/sign/internal/sign_test_utils.go @@ -16,74 +16,68 @@ * limitations under the License. */ -package crypto +package internal import ( crand "crypto/rand" "fmt" - mrand "math/rand" "testing" - "time" "github.com/stretchr/testify/assert" "github.com/stretchr/testify/require" + "github.com/onflow/crypto/common" "github.com/onflow/crypto/hash" + "github.com/onflow/crypto/internal" + "github.com/onflow/crypto/sign" ) -func getPRG(t *testing.T) *mrand.Rand { - random := time.Now().UnixNano() - t.Logf("rng seed is %d", random) - rng := mrand.New(mrand.NewSource(random)) - return rng -} - func TestKeyGenErrors(t *testing.T) { seed := make([]byte, 50) - invalidSigAlgo := SigningAlgorithm(20) - sk, err := GeneratePrivateKey(invalidSigAlgo, seed) + invalidSigAlgo := sign.SigningAlgorithm(20) + sk, err := sign.GeneratePrivateKey(invalidSigAlgo, seed) assert.Nil(t, sk) assert.Error(t, err) - assert.True(t, IsInvalidInputsError(err)) + assert.True(t, common.IsInvalidInputsError(err)) } func TestHasherErrors(t *testing.T) { t.Run("nilHasher error sanity", func(t *testing.T) { - err := errNilHasher - invInpError := invalidInputsErrorf("") + err := common.ErrNilHasher + invInpError := common.InvalidInputsErrorf("") otherError := fmt.Errorf("some error") - assert.True(t, IsNilHasherError(err)) - assert.False(t, IsInvalidInputsError(err)) - assert.False(t, IsNilHasherError(invInpError)) - assert.False(t, IsNilHasherError(otherError)) - assert.False(t, IsNilHasherError(nil)) + assert.True(t, common.IsNilHasherError(err)) + assert.False(t, common.IsInvalidInputsError(err)) + assert.False(t, common.IsNilHasherError(invInpError)) + assert.False(t, common.IsNilHasherError(otherError)) + assert.False(t, common.IsNilHasherError(nil)) }) t.Run("nilHasher error sanity", func(t *testing.T) { - err := invalidHasherSizeErrorf("") - invInpError := invalidInputsErrorf("") + err := common.InvalidHasherSizeErrorf("") + invInpError := common.InvalidInputsErrorf("") otherError := fmt.Errorf("some error") - assert.True(t, IsInvalidHasherSizeError(err)) - assert.False(t, IsInvalidInputsError(err)) - assert.False(t, IsInvalidHasherSizeError(invInpError)) - assert.False(t, IsInvalidHasherSizeError(otherError)) - assert.False(t, IsInvalidHasherSizeError(nil)) + assert.True(t, common.IsInvalidHasherSizeError(err)) + assert.False(t, common.IsInvalidInputsError(err)) + assert.False(t, common.IsInvalidHasherSizeError(invInpError)) + assert.False(t, common.IsInvalidHasherSizeError(otherError)) + assert.False(t, common.IsInvalidHasherSizeError(nil)) }) } // tests sign and verify are consistent for multiple generated keys and messages -func testGenSignVerify(t *testing.T, salg SigningAlgorithm, halg hash.Hasher) { +func TestGenSignVerify(t *testing.T, salg sign.SigningAlgorithm, halg hash.Hasher) { t.Run(fmt.Sprintf("Generation/Signature/Verification for %s", salg), func(t *testing.T) { - seed := make([]byte, KeyGenSeedMinLen) + seed := make([]byte, sign.KeyGenSeedMinLen) input := make([]byte, 100) - rand := getPRG(t) + rand := internal.GetPRG(t) loops := 50 for j := 0; j < loops; j++ { n, err := rand.Read(seed) - require.Equal(t, n, KeyGenSeedMinLen) + require.Equal(t, n, sign.KeyGenSeedMinLen) require.NoError(t, err) - sk, err := GeneratePrivateKey(salg, seed) + sk, err := sign.GeneratePrivateKey(salg, seed) require.NoError(t, err) _, err = rand.Read(input) require.NoError(t, err) @@ -105,7 +99,7 @@ func testGenSignVerify(t *testing.T, salg SigningAlgorithm, halg hash.Hasher) { // test with a valid but different key seed[0] ^= 1 - wrongSk, err := GeneratePrivateKey(salg, seed) + wrongSk, err := sign.GeneratePrivateKey(salg, seed) require.NoError(t, err) result, err = wrongSk.PublicKey().Verify(s, input, halg) require.NoError(t, err) @@ -126,27 +120,27 @@ func testGenSignVerify(t *testing.T, salg SigningAlgorithm, halg hash.Hasher) { // tests the key generation constraints with regards to the input seed, mainly // the seed length constraints and the result determinicity. -func testKeyGenSeed(t *testing.T, salg SigningAlgorithm, minLen int, maxLen int) { +func TestKeyGenSeed(t *testing.T, salg sign.SigningAlgorithm, minLen int, maxLen int) { t.Run("seed length check", func(t *testing.T) { // valid seed lengths seed := make([]byte, minLen) - _, err := GeneratePrivateKey(salg, seed) + _, err := sign.GeneratePrivateKey(salg, seed) assert.NoError(t, err) if maxLen > 0 { seed = make([]byte, maxLen) - _, err = GeneratePrivateKey(salg, seed) + _, err = sign.GeneratePrivateKey(salg, seed) assert.NoError(t, err) } // invalid seed lengths seed = make([]byte, minLen-1) - _, err = GeneratePrivateKey(salg, seed) + _, err = sign.GeneratePrivateKey(salg, seed) assert.Error(t, err) - assert.True(t, IsInvalidInputsError(err)) + assert.True(t, common.IsInvalidInputsError(err)) if maxLen > 0 { seed = make([]byte, maxLen+1) - _, err = GeneratePrivateKey(salg, seed) + _, err = sign.GeneratePrivateKey(salg, seed) assert.Error(t, err) - assert.True(t, IsInvalidInputsError(err)) + assert.True(t, common.IsInvalidInputsError(err)) } }) @@ -156,44 +150,40 @@ func testKeyGenSeed(t *testing.T, salg SigningAlgorithm, minLen int, maxLen int) read, err := crand.Read(seed) require.Equal(t, read, minLen) require.NoError(t, err) - sk1, err := GeneratePrivateKey(salg, seed) + sk1, err := sign.GeneratePrivateKey(salg, seed) require.NoError(t, err) - sk2, err := GeneratePrivateKey(salg, seed) + sk2, err := sign.GeneratePrivateKey(salg, seed) require.NoError(t, err) assert.True(t, sk1.Equals(sk2)) // different seed results in a different key seed[0] ^= 1 // alter a seed bit - sk2, err = GeneratePrivateKey(salg, seed) + sk2, err = sign.GeneratePrivateKey(salg, seed) require.NoError(t, err) assert.False(t, sk1.Equals(sk2)) }) } -var BLS12381Order = []byte{0x73, 0xED, 0xA7, 0x53, 0x29, 0x9D, 0x7D, 0x48, 0x33, 0x39, - 0xD8, 0x08, 0x09, 0xA1, 0xD8, 0x05, 0x53, 0xBD, 0xA4, 0x02, 0xFF, 0xFE, - 0x5B, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x01} - -func testEncodeDecode(t *testing.T, salg SigningAlgorithm) { +func TestEncodeDecode(t *testing.T, salg sign.SigningAlgorithm) { t.Run(fmt.Sprintf("generic encode/decode for %s", salg), func(t *testing.T) { - rand := getPRG(t) + rand := internal.GetPRG(t) t.Run("happy path tests", func(t *testing.T) { loops := 50 for j := 0; j < loops; j++ { // generate a private key - seed := make([]byte, KeyGenSeedMinLen) + seed := make([]byte, sign.KeyGenSeedMinLen) read, err := rand.Read(seed) - require.Equal(t, read, KeyGenSeedMinLen) + require.Equal(t, read, sign.KeyGenSeedMinLen) require.NoError(t, err) - sk, err := GeneratePrivateKey(salg, seed) + sk, err := sign.GeneratePrivateKey(salg, seed) assert.Nil(t, err) seed[0] ^= 1 // alter the seed to get a new private key - distinctSk, err := GeneratePrivateKey(salg, seed) + distinctSk, err := sign.GeneratePrivateKey(salg, seed) require.NoError(t, err) // check private key encoding skBytes := sk.Encode() - skCheck, err := DecodePrivateKey(salg, skBytes) + skCheck, err := sign.DecodePrivateKey(salg, skBytes) require.Nil(t, err) assert.True(t, sk.Equals(skCheck)) skCheckBytes := skCheck.Encode() @@ -204,7 +194,7 @@ func testEncodeDecode(t *testing.T, salg SigningAlgorithm) { // check public key encoding pk := sk.PublicKey() pkBytes := pk.Encode() - pkCheck, err := DecodePublicKey(salg, pkBytes) + pkCheck, err := sign.DecodePublicKey(salg, pkBytes) require.Nil(t, err) assert.True(t, pk.Equals(pkCheck)) pkCheckBytes := pkCheck.Encode() @@ -214,11 +204,13 @@ func testEncodeDecode(t *testing.T, salg SigningAlgorithm) { // same for the compressed encoding // skip if BLS is used and compression isn't supported - if salg == BLSBLS12381 && !isG2Compressed() { + // TODO: fix properly + //if salg == sign.BLSBLS12381 && !isG2Compressed() { + if salg == sign.BLSBLS12381 && false { continue } else { pkComprBytes := pk.EncodeCompressed() - pkComprCheck, err := DecodePublicKeyCompressed(salg, pkComprBytes) + pkComprCheck, err := sign.DecodePublicKeyCompressed(salg, pkComprBytes) require.Nil(t, err) assert.True(t, pk.Equals(pkComprCheck)) pkCheckComprBytes := pkComprCheck.EncodeCompressed() @@ -232,59 +224,61 @@ func testEncodeDecode(t *testing.T, salg SigningAlgorithm) { // test invalid private and public keys (invalid length) t.Run("invalid key length", func(t *testing.T) { // private key - skLens := make(map[SigningAlgorithm]int) - skLens[ECDSAP256] = PrKeyLenECDSAP256 - skLens[ECDSASecp256k1] = PrKeyLenECDSASecp256k1 - skLens[BLSBLS12381] = 32 + skLens := make(map[sign.SigningAlgorithm]int) + // TODO: update this to use the correct private key lengths + skLens[sign.ECDSAP256] = 32 + skLens[sign.ECDSASecp256k1] = 32 + skLens[sign.BLSBLS12381] = 32 bytes := make([]byte, skLens[salg]+1) - sk, err := DecodePrivateKey(salg, bytes) + sk, err := sign.DecodePrivateKey(salg, bytes) require.Error(t, err) - assert.True(t, IsInvalidInputsError(err)) + assert.True(t, common.IsInvalidInputsError(err)) assert.Nil(t, sk) // public key - pkLens := make(map[SigningAlgorithm]int) - pkLens[ECDSAP256] = PubKeyLenECDSAP256 - pkLens[ECDSASecp256k1] = PubKeyLenECDSASecp256k1 - pkLens[BLSBLS12381] = 96 + pkLens := make(map[sign.SigningAlgorithm]int) + // TODO: update this to use the correct public key lengths + pkLens[sign.ECDSAP256] = 64 + pkLens[sign.ECDSASecp256k1] = 64 + pkLens[sign.BLSBLS12381] = 96 bytes = make([]byte, pkLens[salg]+1) - pk, err := DecodePublicKey(salg, bytes) + pk, err := sign.DecodePublicKey(salg, bytes) require.Error(t, err) - assert.True(t, IsInvalidInputsError(err)) + assert.True(t, common.IsInvalidInputsError(err)) assert.Nil(t, pk) }) }) } -func testEquals(t *testing.T, salg SigningAlgorithm, otherSigAlgo SigningAlgorithm) { +func TestEquals(t *testing.T, salg sign.SigningAlgorithm, otherSigAlgo sign.SigningAlgorithm) { t.Run(fmt.Sprintf("equals for %s", salg), func(t *testing.T) { - rand := getPRG(t) + rand := internal.GetPRG(t) // generate a key pair - seed := make([]byte, KeyGenSeedMinLen) + seed := make([]byte, sign.KeyGenSeedMinLen) n, err := rand.Read(seed) - require.Equal(t, n, KeyGenSeedMinLen) + require.Equal(t, n, sign.KeyGenSeedMinLen) require.NoError(t, err) // first pair - sk1, err := GeneratePrivateKey(salg, seed) + sk1, err := sign.GeneratePrivateKey(salg, seed) require.NoError(t, err) pk1 := sk1.PublicKey() // second pair without changing the seed - sk2, err := GeneratePrivateKey(salg, seed) + sk2, err := sign.GeneratePrivateKey(salg, seed) require.NoError(t, err) pk2 := sk2.PublicKey() // unrelated algo pair - sk3, err := GeneratePrivateKey(otherSigAlgo, seed) + sk3, err := sign.GeneratePrivateKey(otherSigAlgo, seed) require.NoError(t, err) pk3 := sk3.PublicKey() // fourth pair with same algo but a different seed seed[0] ^= 1 - sk4, err := GeneratePrivateKey(salg, seed) + sk4, err := sign.GeneratePrivateKey(salg, seed) require.NoError(t, err) pk4 := sk4.PublicKey() @@ -298,7 +292,7 @@ func testEquals(t *testing.T, salg SigningAlgorithm, otherSigAlgo SigningAlgorit }) } -func testKeysAlgorithm(t *testing.T, sk PrivateKey, salg SigningAlgorithm) { +func TestKeysAlgorithm(t *testing.T, sk sign.PrivateKey, salg sign.SigningAlgorithm) { t.Run(fmt.Sprintf("key.Algorithm for %s", salg), func(t *testing.T) { alg := sk.Algorithm() assert.Equal(t, alg, salg) @@ -307,7 +301,7 @@ func testKeysAlgorithm(t *testing.T, sk PrivateKey, salg SigningAlgorithm) { }) } -func testKeySize(t *testing.T, sk PrivateKey, skLen int, pkLen int) { +func TestKeySize(t *testing.T, sk sign.PrivateKey, skLen int, pkLen int) { t.Run(fmt.Sprintf("key.Size for %s", sk.Algorithm()), func(t *testing.T) { size := sk.Size() assert.Equal(t, size, skLen) @@ -316,13 +310,13 @@ func testKeySize(t *testing.T, sk PrivateKey, skLen int, pkLen int) { }) } -func benchVerify(b *testing.B, algo SigningAlgorithm, halg hash.Hasher) { +func BenchVerify(b *testing.B, algo sign.SigningAlgorithm, halg hash.Hasher) { b.Run(fmt.Sprintf("verify %s", algo), func(b *testing.B) { seed := make([]byte, 48) for j := 0; j < len(seed); j++ { seed[j] = byte(j) } - sk, err := GeneratePrivateKey(algo, seed) + sk, err := sign.GeneratePrivateKey(algo, seed) require.NoError(b, err) pk := sk.PublicKey() @@ -343,13 +337,13 @@ func benchVerify(b *testing.B, algo SigningAlgorithm, halg hash.Hasher) { }) } -func benchSign(b *testing.B, algo SigningAlgorithm, halg hash.Hasher) { +func BenchSign(b *testing.B, algo sign.SigningAlgorithm, halg hash.Hasher) { b.Run(fmt.Sprintf("Single sign %s", algo), func(b *testing.B) { seed := make([]byte, 48) for j := 0; j < len(seed); j++ { seed[j] = byte(j) } - sk, err := GeneratePrivateKey(algo, seed) + sk, err := sign.GeneratePrivateKey(algo, seed) require.NoError(b, err) input := []byte("Bench input") diff --git a/sign/internal/signer.go b/sign/internal/signer.go new file mode 100644 index 00000000..69faaae8 --- /dev/null +++ b/sign/internal/signer.go @@ -0,0 +1,18 @@ +package internal + +/* +import "github.com/onflow/crypto/sign" + +type Signer interface { + // GeneratePrivateKey generates a private key + GeneratePrivateKey([]byte) (sign.PrivateKey, error) + // DecodePrivateKey loads a private key from a byte array + DecodePrivateKey([]byte) (sign.PrivateKey, error) + // DecodePublicKey loads a public key from a byte array + DecodePublicKey([]byte) (sign.PublicKey, error) + // DecodePublicKeyCompressed loads a public key from a byte array representing a point in compressed form + DecodePublicKeyCompressed([]byte) (sign.PublicKey, error) + // SignatureFormatCheck verifies the format of a serialized signature + SignatureFormatCheck(sign.Signature) (bool, error) +} +*/ diff --git a/sign.go b/sign/sign.go similarity index 76% rename from sign.go rename to sign/sign.go index 9d5000fe..7b6db235 100644 --- a/sign.go +++ b/sign/sign.go @@ -16,21 +16,16 @@ * limitations under the License. */ -package crypto +package sign import ( - "crypto/elliptic" "fmt" - - "github.com/btcsuite/btcd/btcec/v2" + "reflect" "github.com/onflow/crypto/hash" + "github.com/onflow/crypto/internal" ) -// revive:disable:var-naming - -// revive:enable - // SigningAlgorithm is an identifier for a signing algorithm // (and parameters if applicable) type SigningAlgorithm int @@ -46,6 +41,16 @@ const ( ECDSASecp256k1 ) +// Key generation constants +const ( + // KeyGenSeedMinLen is the minimum seed length for key generation. + // The seed must be at least double the security bits and have enough entropy. + // It is still recommended that seed is generated using a secure RNG. + KeyGenSeedMinLen = 2 * (internal.SecurityBits / 8) + // KeyGenSeedMaxLen is the maximum seed length for key generation. + KeyGenSeedMaxLen = 256 +) + // String returns the string representation of this signing algorithm. func (f SigningAlgorithm) String() string { return [...]string{"UNKNOWN", "BLS_BLS12381", "ECDSA_P256", "ECDSA_secp256k1"}[f] @@ -54,49 +59,96 @@ func (f SigningAlgorithm) String() string { // Signature is a generic type, regardless of the signature scheme type Signature []byte -// Signer interface +// Bytes returns a byte array of the signature data +func (s Signature) Bytes() []byte { + return s[:] +} + +// String returns a String representation of the signature data +func (s Signature) String() string { + return fmt.Sprintf("%#x", s.Bytes()) +} + +// PrivateKey is an unspecified signature scheme private key +type PrivateKey interface { + // Algorithm returns the signing algorithm related to the private key. + Algorithm() SigningAlgorithm + // Size return the key size in bytes. + Size() int + // String return a hex representation of the key + String() string + // Sign generates a signature using the provided hasher. + Sign([]byte, hash.Hasher) (Signature, error) + // PublicKey returns the public key. + PublicKey() PublicKey + // Encode returns a bytes representation of the private key + Encode() []byte + // Equals returns true if the given PrivateKeys are equal. Keys are considered unequal if their algorithms are + // unequal or if their encoded representations are unequal. If the encoding of either key fails, they are considered + // unequal as well. + Equals(PrivateKey) bool +} + +// PublicKey is an unspecified signature scheme public key. +type PublicKey interface { + // Algorithm returns the signing algorithm related to the public key. + Algorithm() SigningAlgorithm + // Size() return the key size in bytes. + Size() int + // String return a hex representation of the key + String() string + // Verify verifies a signature of an input message using the provided hasher. + Verify(Signature, []byte, hash.Hasher) (bool, error) + // Encode returns a bytes representation of the public key. + Encode() []byte + // EncodeCompressed returns a compressed byte representation of the public key. + // The compressed serialization concept is generic to elliptic curves, + // but we refer to individual curve parameters for details of the compressed format + EncodeCompressed() []byte + // Equals returns true if the given PublicKeys are equal. Keys are considered unequal if their algorithms are + // unequal or if their encoded representations are unequal. If the encoding of either key fails, they are considered + // unequal as well. + Equals(PublicKey) bool +} + +// Todo: move to sign/internal type signer interface { - // generatePrivateKey generates a private key - generatePrivateKey([]byte) (PrivateKey, error) - // decodePrivateKey loads a private key from a byte array - decodePrivateKey([]byte) (PrivateKey, error) - // decodePublicKey loads a public key from a byte array - decodePublicKey([]byte) (PublicKey, error) - // decodePublicKeyCompressed loads a public key from a byte array representing a point in compressed form - decodePublicKeyCompressed([]byte) (PublicKey, error) + // GeneratePrivateKey generates a private key + GeneratePrivateKey([]byte) (PrivateKey, error) + // DecodePrivateKey loads a private key from a byte array + DecodePrivateKey([]byte) (PrivateKey, error) + // DecodePublicKey loads a public key from a byte array + DecodePublicKey([]byte) (PublicKey, error) + // DecodePublicKeyCompressed loads a public key from a byte array representing a point in compressed form + DecodePublicKeyCompressed([]byte) (PublicKey, error) + // SignatureFormatCheck verifies the format of a serialized signature + SignatureFormatCheck(Signature) (bool, error) } -// newSigner returns a signer instance -func newSigner(algo SigningAlgorithm) (signer, error) { - switch algo { - case ECDSAP256: - return p256Instance, nil - case ECDSASecp256k1: - return secp256k1Instance, nil - case BLSBLS12381: - return blsInstance, nil - default: - return nil, invalidInputsErrorf("the signature scheme %s is not supported", algo) +// Algorithm instances, initialized by the supported signature algorithms +var signerInstances map[SigningAlgorithm]signer = make(map[SigningAlgorithm]signer) + +// Todo: shouldn't be public - move to sign/internal and update interface{} to Signer +func RegisterSigner(algo SigningAlgorithm, signerInput interface{}) error { + signerInstance, ok := signerInput.(signer) + if !ok { + fmt.Println(reflect.TypeOf(signerInput)) + return fmt.Errorf("signer input is not a signer") + } + + if signerInstances[algo] != nil { + return fmt.Errorf("signer already registered for algorithm %s", algo) } + signerInstances[algo] = signerInstance + return nil } -// Initialize the context of all algos -func init() { - // ECDSA - p256Instance = &(ecdsaAlgo{ - curve: elliptic.P256(), - algo: ECDSAP256, - }) - secp256k1Instance = &(ecdsaAlgo{ - curve: btcec.S256(), - algo: ECDSASecp256k1, - }) - - // BLS - initBLS12381() - blsInstance = &blsBLS12381Algo{ - algo: BLSBLS12381, +// getSigner returns a signer instance of a registered signature algorithm +func getSigner(algo SigningAlgorithm) (signer, error) { + if signerInstances[algo] == nil { + return nil, fmt.Errorf("the signature scheme %s is not supported", algo) } + return signerInstances[algo], nil } // SignatureFormatCheck verifies the format of a serialized signature, @@ -107,16 +159,11 @@ func init() { // If SignatureFormatCheck returns false then the input is not a valid // signature and will fail a verification against any message and public key. func SignatureFormatCheck(algo SigningAlgorithm, s Signature) (bool, error) { - switch algo { - case ECDSAP256: - return p256Instance.signatureFormatCheck(s), nil - case ECDSASecp256k1: - return secp256k1Instance.signatureFormatCheck(s), nil - default: - return false, invalidInputsErrorf( - "the signature scheme %s is not supported", - algo) + signer, err := getSigner(algo) + if err != nil { + return false, fmt.Errorf("signature format check failed: %w", err) } + return signer.SignatureFormatCheck(s) } // GeneratePrivateKey generates a private key of the algorithm using the entropy of the given seed. @@ -130,11 +177,11 @@ func SignatureFormatCheck(algo SigningAlgorithm, s Signature) (bool, error) { // - (false, error) if an unexpected error occurs // - (sk, nil) if key generation was successful func GeneratePrivateKey(algo SigningAlgorithm, seed []byte) (PrivateKey, error) { - signer, err := newSigner(algo) + signer, err := getSigner(algo) if err != nil { return nil, fmt.Errorf("key generation failed: %w", err) } - return signer.generatePrivateKey(seed) + return signer.GeneratePrivateKey(seed) } // DecodePrivateKey decodes an array of bytes into a private key of the given algorithm @@ -149,11 +196,11 @@ func GeneratePrivateKey(algo SigningAlgorithm, seed []byte) (PrivateKey, error) // - (nil, error) if an unexpected error occurs // - (sk, nil) otherwise func DecodePrivateKey(algo SigningAlgorithm, input []byte) (PrivateKey, error) { - signer, err := newSigner(algo) + signer, err := getSigner(algo) if err != nil { return nil, fmt.Errorf("decode private key failed: %w", err) } - return signer.decodePrivateKey(input) + return signer.DecodePrivateKey(input) } // DecodePublicKey decodes an array of bytes into a public key of the given algorithm @@ -170,11 +217,11 @@ func DecodePrivateKey(algo SigningAlgorithm, input []byte) (PrivateKey, error) { // - (nil, error) if an unexpected error occurs // - (pk, nil) otherwise func DecodePublicKey(algo SigningAlgorithm, input []byte) (PublicKey, error) { - signer, err := newSigner(algo) + signer, err := getSigner(algo) if err != nil { return nil, fmt.Errorf("decode public key failed: %w", err) } - return signer.decodePublicKey(input) + return signer.DecodePublicKey(input) } // DecodePublicKeyCompressed decodes an array of bytes given in a compressed representation into a public key of the given algorithm. @@ -190,65 +237,9 @@ func DecodePublicKey(algo SigningAlgorithm, input []byte) (PublicKey, error) { // - (nil, error) if an unexpected error occurs // - (pk, nil) otherwise func DecodePublicKeyCompressed(algo SigningAlgorithm, data []byte) (PublicKey, error) { - signer, err := newSigner(algo) + signer, err := getSigner(algo) if err != nil { return nil, fmt.Errorf("decode compressed public key failed: %w", err) } - return signer.decodePublicKeyCompressed(data) -} - -// Signature type tools - -// Bytes returns a byte array of the signature data -func (s Signature) Bytes() []byte { - return s[:] -} - -// String returns a String representation of the signature data -func (s Signature) String() string { - return fmt.Sprintf("%#x", s.Bytes()) -} - -// Key Pair - -// PrivateKey is an unspecified signature scheme private key -type PrivateKey interface { - // Algorithm returns the signing algorithm related to the private key. - Algorithm() SigningAlgorithm - // Size return the key size in bytes. - Size() int - // String return a hex representation of the key - String() string - // Sign generates a signature using the provided hasher. - Sign([]byte, hash.Hasher) (Signature, error) - // PublicKey returns the public key. - PublicKey() PublicKey - // Encode returns a bytes representation of the private key - Encode() []byte - // Equals returns true if the given PrivateKeys are equal. Keys are considered unequal if their algorithms are - // unequal or if their encoded representations are unequal. If the encoding of either key fails, they are considered - // unequal as well. - Equals(PrivateKey) bool -} - -// PublicKey is an unspecified signature scheme public key. -type PublicKey interface { - // Algorithm returns the signing algorithm related to the public key. - Algorithm() SigningAlgorithm - // Size() return the key size in bytes. - Size() int - // String return a hex representation of the key - String() string - // Verify verifies a signature of an input message using the provided hasher. - Verify(Signature, []byte, hash.Hasher) (bool, error) - // Encode returns a bytes representation of the public key. - Encode() []byte - // EncodeCompressed returns a compressed byte representation of the public key. - // The compressed serialization concept is generic to elliptic curves, - // but we refer to individual curve parameters for details of the compressed format - EncodeCompressed() []byte - // Equals returns true if the given PublicKeys are equal. Keys are considered unequal if their algorithms are - // unequal or if their encoded representations are unequal. If the encoding of either key fails, they are considered - // unequal as well. - Equals(PublicKey) bool + return signer.DecodePublicKeyCompressed(data) }