mirror of
https://github.com/KevinMidboe/linguist.git
synced 2025-10-29 17:50:22 +00:00
124 lines
3.9 KiB
C++
124 lines
3.9 KiB
C++
// Copyright (c) 2009-2012 The Bitcoin Developers
|
|
// Distributed under the MIT/X11 software license, see the accompanying
|
|
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
|
|
|
|
// Source - https://github.com/Bradfrogger/Marvelous/blob/master/src/crypter.cpp
|
|
|
|
#include <openssl/aes.h>
|
|
#include <openssl/evp.h>
|
|
#include <vector>
|
|
#include <string>
|
|
#ifdef WIN32
|
|
#include <windows.h>
|
|
#endif
|
|
|
|
#include "crypter.h"
|
|
|
|
bool CCrypter::SetKeyFromPassphrase(const SecureString& strKeyData, const std::vector<unsigned char>& chSalt, const unsigned int nRounds, const unsigned int nDerivationMethod)
|
|
{
|
|
if (nRounds < 1 || chSalt.size() != WALLET_CRYPTO_SALT_SIZE)
|
|
return false;
|
|
|
|
int i = 0;
|
|
if (nDerivationMethod == 0)
|
|
i = EVP_BytesToKey(EVP_aes_256_cbc(), EVP_sha512(), &chSalt[0],
|
|
(unsigned char *)&strKeyData[0], strKeyData.size(), nRounds, chKey, chIV);
|
|
|
|
if (i != (int)WALLET_CRYPTO_KEY_SIZE)
|
|
{
|
|
OPENSSL_cleanse(chKey, sizeof(chKey));
|
|
OPENSSL_cleanse(chIV, sizeof(chIV));
|
|
return false;
|
|
}
|
|
|
|
fKeySet = true;
|
|
return true;
|
|
}
|
|
|
|
bool CCrypter::SetKey(const CKeyingMaterial& chNewKey, const std::vector<unsigned char>& chNewIV)
|
|
{
|
|
if (chNewKey.size() != WALLET_CRYPTO_KEY_SIZE || chNewIV.size() != WALLET_CRYPTO_KEY_SIZE)
|
|
return false;
|
|
|
|
memcpy(&chKey[0], &chNewKey[0], sizeof chKey);
|
|
memcpy(&chIV[0], &chNewIV[0], sizeof chIV);
|
|
|
|
fKeySet = true;
|
|
return true;
|
|
}
|
|
|
|
bool CCrypter::Encrypt(const CKeyingMaterial& vchPlaintext, std::vector<unsigned char> &vchCiphertext)
|
|
{
|
|
if (!fKeySet)
|
|
return false;
|
|
|
|
// max ciphertext len for a n bytes of plaintext is
|
|
// n + AES_BLOCK_SIZE - 1 bytes
|
|
int nLen = vchPlaintext.size();
|
|
int nCLen = nLen + AES_BLOCK_SIZE, nFLen = 0;
|
|
vchCiphertext = std::vector<unsigned char> (nCLen);
|
|
|
|
EVP_CIPHER_CTX ctx;
|
|
|
|
bool fOk = true;
|
|
|
|
EVP_CIPHER_CTX_init(&ctx);
|
|
if (fOk) fOk = EVP_EncryptInit_ex(&ctx, EVP_aes_256_cbc(), NULL, chKey, chIV);
|
|
if (fOk) fOk = EVP_EncryptUpdate(&ctx, &vchCiphertext[0], &nCLen, &vchPlaintext[0], nLen);
|
|
if (fOk) fOk = EVP_EncryptFinal_ex(&ctx, (&vchCiphertext[0])+nCLen, &nFLen);
|
|
EVP_CIPHER_CTX_cleanup(&ctx);
|
|
|
|
if (!fOk) return false;
|
|
|
|
vchCiphertext.resize(nCLen + nFLen);
|
|
return true;
|
|
}
|
|
|
|
bool CCrypter::Decrypt(const std::vector<unsigned char>& vchCiphertext, CKeyingMaterial& vchPlaintext)
|
|
{
|
|
if (!fKeySet)
|
|
return false;
|
|
|
|
// plaintext will always be equal to or lesser than length of ciphertext
|
|
int nLen = vchCiphertext.size();
|
|
int nPLen = nLen, nFLen = 0;
|
|
|
|
vchPlaintext = CKeyingMaterial(nPLen);
|
|
|
|
EVP_CIPHER_CTX ctx;
|
|
|
|
bool fOk = true;
|
|
|
|
EVP_CIPHER_CTX_init(&ctx);
|
|
if (fOk) fOk = EVP_DecryptInit_ex(&ctx, EVP_aes_256_cbc(), NULL, chKey, chIV);
|
|
if (fOk) fOk = EVP_DecryptUpdate(&ctx, &vchPlaintext[0], &nPLen, &vchCiphertext[0], nLen);
|
|
if (fOk) fOk = EVP_DecryptFinal_ex(&ctx, (&vchPlaintext[0])+nPLen, &nFLen);
|
|
EVP_CIPHER_CTX_cleanup(&ctx);
|
|
|
|
if (!fOk) return false;
|
|
|
|
vchPlaintext.resize(nPLen + nFLen);
|
|
return true;
|
|
}
|
|
|
|
|
|
bool EncryptSecret(const CKeyingMaterial& vMasterKey, const CKeyingMaterial &vchPlaintext, const uint256& nIV, std::vector<unsigned char> &vchCiphertext)
|
|
{
|
|
CCrypter cKeyCrypter;
|
|
std::vector<unsigned char> chIV(WALLET_CRYPTO_KEY_SIZE);
|
|
memcpy(&chIV[0], &nIV, WALLET_CRYPTO_KEY_SIZE);
|
|
if(!cKeyCrypter.SetKey(vMasterKey, chIV))
|
|
return false;
|
|
return cKeyCrypter.Encrypt(*((const CKeyingMaterial*)&vchPlaintext), vchCiphertext);
|
|
}
|
|
|
|
bool DecryptSecret(const CKeyingMaterial& vMasterKey, const std::vector<unsigned char>& vchCiphertext, const uint256& nIV, CKeyingMaterial& vchPlaintext)
|
|
{
|
|
CCrypter cKeyCrypter;
|
|
std::vector<unsigned char> chIV(WALLET_CRYPTO_KEY_SIZE);
|
|
memcpy(&chIV[0], &nIV, WALLET_CRYPTO_KEY_SIZE);
|
|
if(!cKeyCrypter.SetKey(vMasterKey, chIV))
|
|
return false;
|
|
return cKeyCrypter.Decrypt(vchCiphertext, *((CKeyingMaterial*)&vchPlaintext));
|
|
}
|