security.cpp

#include "security.h"
#include "../utils/config.h" // for timestamp access
#include <ctime>
#include <cstdio>
#include <cctype>
#include <algorithm>
#include <iostream>

using namespace std;

// ================= SELF-DESTRUCT =================
void destroyVault() {
    // Deletes real vault and config
    remove("data/vault.txt");
    remove("data/config.txt");

    cout << "💣 Vault permanently destroyed!\n";
}


// ================= EXPIRY CHECK =================
void checkExpiry() {
    time_t now = time(0);

    // getTimestamp() returns creation time from config
    time_t created = getTimestamp();

    if (created != 0 && (now - created > 86400)) { // 24 hours
        cout << "⏳ Vault expired. Triggering self-destruct...\n";
        destroyVault();
        exit(0); // terminate program immediately
    }
}


// ================= ENCRYPTION (SHIFT CIPHER) =================
string encrypt(string s) {
    for(char &c : s) {
        c += 2; // simple +2 shift
    }
    return s;
}

string decrypt(string s) {
    for(char &c : s) {
        c -= 2; // reverse shift
    }
    return s;
}


// ================= PASSWORD STRENGTH =================
int passwordStrength(string pwd) {
    bool hasUpper = false, hasLower = false, hasDigit = false, hasSpecial = false;

    for(char c : pwd) {
        if(isupper(c)) hasUpper = true;
        else if(islower(c)) hasLower = true;
        else if(isdigit(c)) hasDigit = true;
        else hasSpecial = true;
    }

    int score = 0;
    if(hasUpper) score++;
    if(hasLower) score++;
    if(hasDigit) score++;
    if(hasSpecial) score++;

    return score; // 1-4
}