Implement actual cryptographic functions using Crypto++ library
This commit is contained in:
@ -45,6 +45,41 @@ else()
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endif()
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endif()
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# Handle Crypto++ dependency
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# First try to find it as a package
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find_package(PkgConfig QUIET)
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if(PKG_CONFIG_FOUND)
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pkg_check_modules(CRYPTOPP QUIET libcrypto++ cryptopp)
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endif()
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if(CRYPTOPP_FOUND)
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# Use the found package
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message(STATUS "Found Crypto++ package")
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set(CRYPTOPP_INCLUDE_DIRS ${CRYPTOPP_INCLUDE_DIRS})
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set(CRYPTOPP_LIBRARIES ${CRYPTOPP_LIBRARIES})
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else()
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# Download it as a submodule or include it directly
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message(STATUS "Crypto++ not found as package, will use submodule")
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# Check if we have it in external/cryptopp
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if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/external/cryptopp/cryptlib.h")
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set(CRYPTOPP_INCLUDE_DIRS "${CMAKE_CURRENT_SOURCE_DIR}/external/cryptopp")
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# For local build, we assume the library is built separately
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set(CRYPTOPP_LIBRARIES cryptopp)
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else()
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# Try to download it
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include(FetchContent)
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FetchContent_Declare(
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cryptopp
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GIT_REPOSITORY https://github.com/weidai11/cryptopp.git
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GIT_TAG CRYPTOPP_8_8_0
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)
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FetchContent_MakeAvailable(cryptopp)
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set(CRYPTOPP_INCLUDE_DIRS ${cryptopp_SOURCE_DIR})
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set(CRYPTOPP_LIBRARIES cryptopp)
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endif()
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endif()
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# Add library sources
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set(SOURCES
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src/privatebinapi.cpp
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@ -77,6 +112,10 @@ else()
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target_include_directories(privatebinapi PRIVATE ${NLOHMANN_JSON_INCLUDE_DIRS})
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endif()
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# Include Crypto++
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target_include_directories(privatebinapi PRIVATE ${CRYPTOPP_INCLUDE_DIRS})
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target_link_libraries(privatebinapi ${CRYPTOPP_LIBRARIES})
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# Link dependencies
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target_link_libraries(privatebinapi ${PLATFORM_LIBS})
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@ -11,5 +11,10 @@ cmake .. -G "Visual Studio 17 2022"
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REM Build the project
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cmake --build . --config Release
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echo Build completed!
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if %ERRORLEVEL% EQU 0 (
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echo Build completed successfully!
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) else (
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echo Build failed with error level %ERRORLEVEL%
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)
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cd ..
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182
src/crypto.cpp
182
src/crypto.cpp
@ -3,18 +3,24 @@
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#include <stdexcept>
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#include <cstring>
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// For now, we'll provide stub implementations
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// In a real implementation, you would use a crypto library like Crypto++ or OpenSSL
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// Crypto++ includes
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#include "cryptlib.h"
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#include "osrng.h" // AutoSeededRandomPool
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#include "aes.h" // AES encryption
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#include "gcm.h" // GCM mode
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#include "pwdbased.h" // PBKDF2
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#include "sha.h" // SHA256
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#include "hex.h" // Hex encoder/decoder
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#include "zlib.h" // Zlib compression
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using namespace CryptoPP;
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std::vector<unsigned char> Crypto::generate_key(size_t length) {
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std::vector<unsigned char> key(length);
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std::random_device rd;
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std::mt19937 gen(rd());
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std::uniform_int_distribution<> dis(0, 255);
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for (size_t i = 0; i < length; ++i) {
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key[i] = static_cast<unsigned char>(dis(gen));
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}
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// Use Crypto++ AutoSeededRandomPool for cryptographically secure random numbers
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AutoSeededRandomPool rng;
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rng.GenerateBlock(key.data(), length);
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return key;
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}
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@ -23,58 +29,148 @@ std::vector<unsigned char> Crypto::encrypt(const std::vector<unsigned char>& pla
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const std::vector<unsigned char>& key,
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const std::vector<unsigned char>& iv,
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std::vector<unsigned char>& auth_tag) {
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// This is a stub implementation - in a real implementation,
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// you would use a proper crypto library like Crypto++ or OpenSSL
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// to perform AES-GCM encryption
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// For demonstration purposes, we'll just return the plaintext
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// In a real implementation, this would be the actual encryption
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auth_tag.resize(16, 0); // 128-bit authentication tag
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return plaintext;
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try {
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// Create GCM mode encryption object
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GCM<AES>::Encryption encryption;
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// Set key and IV
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encryption.SetKeyWithIV(key.data(), key.size(), iv.data(), iv.size());
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// Prepare output vector
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std::vector<unsigned char> ciphertext(plaintext.size());
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// Prepare authentication tag (16 bytes for GCM)
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auth_tag.resize(16);
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// Perform encryption
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encryption.EncryptAndAuthenticate(
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ciphertext.data(),
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auth_tag.data(),
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auth_tag.size(),
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iv.data(),
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iv.size(),
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nullptr,
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0, // Additional authenticated data
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plaintext.data(),
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plaintext.size()
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);
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return ciphertext;
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}
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catch(const Exception& e) {
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throw std::runtime_error("Encryption failed: " + std::string(e.what()));
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}
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}
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std::vector<unsigned char> Crypto::decrypt(const std::vector<unsigned char>& ciphertext,
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const std::vector<unsigned char>& key,
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const std::vector<unsigned char>& iv,
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const std::vector<unsigned char>& auth_tag) {
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// This is a stub implementation - in a real implementation,
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// you would use a proper crypto library like Crypto++ or OpenSSL
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// to perform AES-GCM decryption
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// For demonstration purposes, we'll just return the ciphertext
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// In a real implementation, this would be the actual decryption
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return ciphertext;
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try {
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// Create GCM mode decryption object
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GCM<AES>::Decryption decryption;
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// Set key and IV
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decryption.SetKeyWithIV(key.data(), key.size(), iv.data(), iv.size());
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// Prepare output vector
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std::vector<unsigned char> plaintext(ciphertext.size());
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// Perform decryption and authentication
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DecryptionResult result = decryption.DecryptAndVerify(
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plaintext.data(),
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auth_tag.data(),
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auth_tag.size(),
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iv.data(),
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iv.size(),
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nullptr,
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0, // Additional authenticated data
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ciphertext.data(),
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ciphertext.size()
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);
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if(!result.isValidCoding) {
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throw std::runtime_error("Authentication failed during decryption");
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}
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// Resize to actual plaintext size
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plaintext.resize(result.messageLength);
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return plaintext;
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}
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catch(const Exception& e) {
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throw std::runtime_error("Decryption failed: " + std::string(e.what()));
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}
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}
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std::vector<unsigned char> Crypto::pbkdf2_hmac_sha256(const std::string& password,
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const std::vector<unsigned char>& salt,
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int iterations,
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size_t key_length) {
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// This is a stub implementation - in a real implementation,
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// you would use a proper crypto library to perform PBKDF2-HMAC-SHA256
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// For demonstration purposes, we'll just return a key of the requested length
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// filled with a simple pattern
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std::vector<unsigned char> key(key_length, 0);
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for (size_t i = 0; i < key_length; i++) {
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key[i] = static_cast<unsigned char>((i * 17) % 256);
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try {
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std::vector<unsigned char> derived_key(key_length);
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// Use Crypto++ PKCS5_PBKDF2_HMAC for key derivation
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PKCS5_PBKDF2_HMAC<SHA256> pbkdf;
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pbkdf.DeriveKey(
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derived_key.data(),
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derived_key.size(),
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0x00, // Purpose byte
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reinterpret_cast<const byte*>(password.data()),
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password.length(),
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salt.data(),
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salt.size(),
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iterations,
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0.0f // Timeout (0 = no timeout)
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);
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return derived_key;
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}
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catch(const Exception& e) {
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throw std::runtime_error("PBKDF2 key derivation failed: " + std::string(e.what()));
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}
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return key;
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}
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std::vector<unsigned char> Crypto::compress(const std::vector<unsigned char>& data) {
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// This is a stub implementation - in a real implementation,
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// you would use zlib or another compression library
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// For demonstration purposes, we'll just return the data as-is
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return data;
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try {
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std::string compressed;
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// Create zlib compressor
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ZlibCompressor compressor;
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compressor.Put(data.data(), data.size());
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compressor.MessageEnd();
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// Retrieve compressed data
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size_t size = compressor.MaxRetrievable();
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compressed.resize(size);
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compressor.Get(reinterpret_cast<byte*>(&compressed[0]), compressed.size());
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// Convert to vector
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return std::vector<unsigned char>(compressed.begin(), compressed.end());
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}
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catch(const Exception& e) {
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throw std::runtime_error("Compression failed: " + std::string(e.what()));
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}
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}
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std::vector<unsigned char> Crypto::decompress(const std::vector<unsigned char>& data) {
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// This is a stub implementation - in a real implementation,
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// you would use zlib or another decompression library
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// For demonstration purposes, we'll just return the data as-is
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return data;
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try {
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std::string decompressed;
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// Create zlib decompressor
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ZlibDecompressor decompressor;
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decompressor.Put(data.data(), data.size());
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decompressor.MessageEnd();
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// Retrieve decompressed data
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size_t size = decompressor.MaxRetrievable();
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decompressed.resize(size);
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decompressor.Get(reinterpret_cast<byte*>(&decompressed[0]), decompressed.size());
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// Convert to vector
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return std::vector<unsigned char>(decompressed.begin(), decompressed.end());
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}
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catch(const Exception& e) {
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throw std::runtime_error("Decompression failed: " + std::string(e.what()));
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}
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}
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