Add boost/asio/ssl-wolfssl integration.

builds/msvc/vs2022/libbitcoin-network.import.props

@@ -15,9 +15,13 @@
 
   <ItemDefinitionGroup>
     <ClCompile>
+      <!-- include\bitcoin\ssl\ is a directory clone of a subset of wolfssl sources, plus config. -->
+      <AdditionalIncludeDirectories>$(ProjectDir)..\..\..\..\..\libbitcoin-network\include\bitcoin\ssl\;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <AdditionalIncludeDirectories>$(ProjectDir)..\..\..\..\..\libbitcoin-network\include\;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <AdditionalOptions>/bigobj %(AdditionalOptions)</AdditionalOptions>
       <PreprocessorDefinitions Condition="'$(Linkage-libbitcoin-network)' == 'static' Or '$(Linkage-libbitcoin-network)' == 'ltcg'">BCT_STATIC;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <!-- WOLFSSL_USER_SETTINGS enables import of "user_settings.h" into wolfssl without source modification. -->
+      <PreprocessorDefinitions>WOLFSSL_USER_SETTINGS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
     <Link>
       <AdditionalDependencies Condition="'$(Linkage-libbitcoin-network)' != ''">libbitcoin-network.lib;%(AdditionalDependencies)</AdditionalDependencies>

builds/msvc/vs2022/libbitcoin-network/libbitcoin-network.props

@@ -11,8 +11,8 @@
 
   <ItemDefinitionGroup>
     <ClCompile>
-      <!-- src\wolfssl\ is a directory clone of a subset of wolfssl sources. -->
-      <AdditionalIncludeDirectories>$(RepoRoot)src\wolfssl\;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <!-- include\bitcoin\ssl\ is a directory clone of a subset of wolfssl sources, plus config. -->
+      <AdditionalIncludeDirectories>$(RepoRoot)include\bitcoin\ssl\;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <AdditionalIncludeDirectories>$(RepoRoot)include\;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <AdditionalOptions>/bigobj %(AdditionalOptions)</AdditionalOptions>
       <EnablePREfast>false</EnablePREfast>

configure.ac

@@ -124,6 +124,13 @@ AC_ARG_ENABLE([isystem],
 AC_MSG_RESULT([$enable_isystem])
 
 
+# Set preprocessor defines.
+#==============================================================================
+# Unconditionally define the preprocessor symbol WOLFSSL_USER_SETTINGS.
+#------------------------------------------------------------------------------
+AC_DEFINE([WOLFSSL_USER_SETTINGS])
+
+
 # Set flags.
 #==============================================================================
 # Require c++20 for all c++ products.

include/bitcoin/network/async/asio.hpp

@@ -56,10 +56,24 @@ typedef asio::acceptor::reuse_address reuse_address;
 /// connect
 typedef tcp::socket socket;
 typedef std::shared_ptr<socket> socket_ptr;
-
 constexpr auto max_connections = 
     boost::asio::socket_base::max_listen_connections;
 
+/// ssl
+namespace ssl {
+
+typedef boost::asio::ssl::context context;
+typedef boost::asio::ssl::stream<asio::socket> socket;
+
+// Just testing out the ssl socket compile.
+inline void foobar() THROWS
+{
+    io_context my_io_context{};
+    context my_ssl_context{ context::tlsv12_server };
+    socket my_ssl_socket{ my_io_context, my_ssl_context };
+}
+
+} // namespace ssl
 } // namespace asio
 } // namespace network
 } // namespace libbitcoin

include/bitcoin/network/boost.hpp

@@ -21,7 +21,14 @@
 
 #include <bitcoin/network/version.hpp>
 
+// See <boost/asio/ssl/detail/openssl_types.hpp> for wolf/openssl includes.
+#define BOOST_ASIO_USE_WOLFSSL
+#define BOOST_ASIO_NO_DEPRECATED
+
+// The /ssl/openssl/ directory is provided for direct ssl import by boost,
+// which is required because <boost/asio/ssl.hpp> is included.
 #include <boost/asio.hpp>
+#include <boost/asio/ssl.hpp>
 #include <boost/bimap.hpp>
 #include <boost/bimap/set_of.hpp>
 #include <boost/bimap/multiset_of.hpp>

include/bitcoin/ssl/openssl/conf.h

@@ -0,0 +1,25 @@
+/**
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
+ *
+ * This file is part of libbitcoin.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef LIBBITCOIN_NETWORK_SSL_OPENSSL_CONF_H
+#define LIBBITCOIN_NETWORK_SSL_OPENSSL_CONF_H
+
+// Forward <boost/asio/ssl/detail/openssl_types.hpp> load of <openssl/conf.h>.
+#include <wolfssl/openssl/conf.h>
+
+#endif

include/bitcoin/ssl/openssl/dh.h

@@ -0,0 +1,25 @@
+/**
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
+ *
+ * This file is part of libbitcoin.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef LIBBITCOIN_NETWORK_SSL_OPENSSL_DH_H
+#define LIBBITCOIN_NETWORK_SSL_OPENSSL_DH_H
+
+// Forward <boost/asio/ssl/detail/openssl_types.hpp> load of <openssl/dh.h>.
+#include <wolfssl/openssl/dh.h>
+
+#endif

include/bitcoin/ssl/openssl/err.h

@@ -0,0 +1,25 @@
+/**
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
+ *
+ * This file is part of libbitcoin.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef LIBBITCOIN_NETWORK_SSL_OPENSSL_ERR_H
+#define LIBBITCOIN_NETWORK_SSL_OPENSSL_ERR_H
+
+// Forward <boost/asio/ssl/detail/openssl_types.hpp> load of <openssl/err.h>.
+#include <wolfssl/openssl/err.h>
+
+#endif

include/bitcoin/ssl/openssl/openssl.h

@@ -0,0 +1,26 @@
+/**
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
+ *
+ * This file is part of libbitcoin.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef LIBBITCOIN_NETWORK_SSL_OPENSSL_OPENSSL_H
+#define LIBBITCOIN_NETWORK_SSL_OPENSSL_OPENSSL_H
+
+// This directory is defined by libbitcoin to provide the expected path for
+// boost::asio to #include the contained headers. Each header forwards to:
+// #include <wolfssl/openssl/*.h>
+
+#endif

include/bitcoin/ssl/openssl/rsa.h

@@ -0,0 +1,25 @@
+/**
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
+ *
+ * This file is part of libbitcoin.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef LIBBITCOIN_NETWORK_SSL_OPENSSL_RSA_H
+#define LIBBITCOIN_NETWORK_SSL_OPENSSL_RSA_H
+
+// Forward <boost/asio/ssl/detail/openssl_types.hpp> load of <openssl/rsa.h>.
+#include <wolfssl/openssl/rsa.h>
+
+#endif

include/bitcoin/ssl/openssl/ssl.h

@@ -0,0 +1,25 @@
+/**
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
+ *
+ * This file is part of libbitcoin.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef LIBBITCOIN_NETWORK_SSL_OPENSSL_SSL_H
+#define LIBBITCOIN_NETWORK_SSL_OPENSSL_SSL_H
+
+// Forward <boost/asio/ssl/detail/openssl_types.hpp> load of <openssl/ssl.h>.
+#include <wolfssl/openssl/ssl.h>
+
+#endif

include/bitcoin/ssl/openssl/x509.h

@@ -0,0 +1,25 @@
+/**
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
+ *
+ * This file is part of libbitcoin.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef LIBBITCOIN_NETWORK_SSL_OPENSSL_X509_H
+#define LIBBITCOIN_NETWORK_SSL_OPENSSL_X509_H
+
+// Forward <boost/asio/ssl/detail/openssl_types.hpp> load of <openssl/x509.h>.
+#include <wolfssl/openssl/x509.h>
+
+#endif

include/bitcoin/ssl/openssl/x509v3.h

@@ -0,0 +1,25 @@
+/**
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
+ *
+ * This file is part of libbitcoin.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef LIBBITCOIN_NETWORK_SSL_OPENSSL_X509V3_H
+#define LIBBITCOIN_NETWORK_SSL_OPENSSL_X509V3_H
+
+// Forward <boost/asio/ssl/detail/openssl_types.hpp> load of <openssl/x509v3.h>.
+#include <wolfssl/openssl/x509v3.h>
+
+#endif

include/bitcoin/ssl/wolfcrypt/wolfcrypt.h

@@ -0,0 +1,26 @@
+/**
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
+ *
+ * This file is part of libbitcoin.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef LIBBITCOIN_NETWORK_SSL_WOLFCRYPT_WOLFCRYPT_H
+#define LIBBITCOIN_NETWORK_SSL_WOLFCRYPT_WOLFCRYPT_H
+
+// This directory is defined by libbitcoin to provide the expected path so that
+// wolfssl sources may remain unmodified and specify:
+// #include <wolfcrypt/src/misc.c>
+
+#endif

include/bitcoin/ssl/wolfssl/options.h

@@ -0,0 +1,30 @@
+/**
+ * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
+ *
+ * This file is part of libbitcoin.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef LIBBITCOIN_NETWORK_SSL_WOLFSSL_OPTIONS_H
+#define LIBBITCOIN_NETWORK_SSL_WOLFSSL_OPTIONS_H
+
+// This ensures boost sees all configuration, but probably not used.
+#include <wolfssl/wolfcrypt/user_settings.h>
+
+// Boost ASIO pulls in this file when BOOST_ASIO_USE_WOLFSSL is defined.
+////#if defined(BOOST_ASIO_USE_WOLFSSL)
+////    #include <wolfssl/options.h>
+////#endif
+
+#endif