// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
-#include <openssl/aes.h>
+#include "crypter.h"
+
#include <openssl/evp.h>
-#include <vector>
-#include <string>
-#ifdef WIN32
-#include <windows.h>
-#endif
-#include "crypter.h"
-#include "scrypt.h"
bool CCrypter::SetKeyFromPassphrase(const SecureString& strKeyData, const std::vector<unsigned char>& chSalt, const unsigned int nRounds, const unsigned int nDerivationMethod)
{
(unsigned char *)&strKeyData[0], strKeyData.size(), nRounds, chKey, chIV);
}
- if (nDerivationMethod == 1)
- {
- // Passphrase conversion
- uint256 scryptHash = scrypt_salted_multiround_hash((const void*)strKeyData.c_str(), strKeyData.size(), &chSalt[0], 8, nRounds);
-
- i = EVP_BytesToKey(EVP_aes_256_cbc(), EVP_sha512(), &chSalt[0],
- (unsigned char *)&scryptHash, sizeof scryptHash, nRounds, chKey, chIV);
- memset(&scryptHash, 0, sizeof scryptHash);
- }
-
-
if (i != (int)WALLET_CRYPTO_KEY_SIZE)
{
- memset(&chKey, 0, sizeof chKey);
- memset(&chIV, 0, sizeof chIV);
+ OPENSSL_cleanse(&chKey, sizeof chKey);
+ OPENSSL_cleanse(&chIV, sizeof chIV);
return false;
}
// max ciphertext len for a n bytes of plaintext is
// n + AES_BLOCK_SIZE - 1 bytes
+ constexpr int AES_BLOCK_SIZE = 16; // from openssl/aes.h
int nLen = vchPlaintext.size();
int nCLen = nLen + AES_BLOCK_SIZE, nFLen = 0;
vchCiphertext = std::vector<unsigned char> (nCLen);
- EVP_CIPHER_CTX ctx;
+ 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);
+ ctx = EVP_CIPHER_CTX_new();
+ if (fOk) fOk = EVP_EncryptInit_ex(ctx, EVP_aes_256_cbc(), NULL, chKey, chIV) != 0;
+ if (fOk) fOk = EVP_EncryptUpdate(ctx, &vchCiphertext[0], &nCLen, &vchPlaintext[0], nLen) != 0;
+ if (fOk) fOk = EVP_EncryptFinal_ex(ctx, (&vchCiphertext[0]) + nCLen, &nFLen) != 0;
+ EVP_CIPHER_CTX_free(ctx);
if (!fOk) return false;
vchPlaintext = CKeyingMaterial(nPLen);
- EVP_CIPHER_CTX ctx;
+ 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);
+ ctx = EVP_CIPHER_CTX_new();
+ if (fOk) fOk = EVP_DecryptInit_ex(ctx, EVP_aes_256_cbc(), NULL, chKey, chIV) != 0;
+ if (fOk) fOk = EVP_DecryptUpdate(ctx, &vchPlaintext[0], &nPLen, &vchCiphertext[0], nLen) != 0;
+ if (fOk) fOk = EVP_DecryptFinal_ex(ctx, (&vchPlaintext[0]) + nPLen, &nFLen) != 0;
+ EVP_CIPHER_CTX_free(ctx);
if (!fOk) return false;