-// Copyright (c) 2011 The Bitcoin Developers
+// 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.
#include <openssl/evp.h>
#include <vector>
#include <string>
-#include "headers.h"
+
+#include "crypter.h"
+
#ifdef WIN32
#include <windows.h>
#endif
-#include "crypter.h"
-#include "main.h"
-#include "util.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;
- // Try to keep the keydata out of swap (and be a bit over-careful to keep the IV that we don't even use out of swap)
- // Note that this does nothing about suspend-to-disk (which will put all our key data on disk)
- // Note as well that at no point in this program is any attempt made to prevent stealing of keys by reading the memory of the running process.
- mlock(&chKey[0], sizeof chKey);
- mlock(&chIV[0], sizeof chIV);
-
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 != WALLET_CRYPTO_KEY_SIZE)
+ 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;
}
if (chNewKey.size() != WALLET_CRYPTO_KEY_SIZE || chNewIV.size() != WALLET_CRYPTO_KEY_SIZE)
return false;
- // Try to keep the keydata out of swap
- // Note that this does nothing about suspend-to-disk (which will put all our key data on disk)
- // Note as well that at no point in this program is any attempt made to prevent stealing of keys by reading the memory of the running process.
- mlock(&chKey[0], sizeof chKey);
- mlock(&chIV[0], sizeof chIV);
-
memcpy(&chKey[0], &chNewKey[0], sizeof chKey);
memcpy(&chIV[0], &chNewIV[0], sizeof chIV);
EVP_CIPHER_CTX ctx;
- EVP_CIPHER_CTX_init(&ctx);
- EVP_EncryptInit_ex(&ctx, EVP_aes_256_cbc(), NULL, chKey, chIV);
-
- EVP_EncryptUpdate(&ctx, &vchCiphertext[0], &nCLen, &vchPlaintext[0], nLen);
- EVP_EncryptFinal_ex(&ctx, (&vchCiphertext[0])+nCLen, &nFLen);
+ bool fOk = true;
+ EVP_CIPHER_CTX_init(&ctx);
+ 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_cleanup(&ctx);
+ if (!fOk) return false;
+
vchCiphertext.resize(nCLen + nFLen);
return true;
}
EVP_CIPHER_CTX ctx;
- EVP_CIPHER_CTX_init(&ctx);
- EVP_DecryptInit_ex(&ctx, EVP_aes_256_cbc(), NULL, chKey, chIV);
-
- EVP_DecryptUpdate(&ctx, &vchPlaintext[0], &nPLen, &vchCiphertext[0], nLen);
- EVP_DecryptFinal_ex(&ctx, (&vchPlaintext[0])+nPLen, &nFLen);
+ bool fOk = true;
+ EVP_CIPHER_CTX_init(&ctx);
+ 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_cleanup(&ctx);
+ if (!fOk) return false;
+
vchPlaintext.resize(nPLen + nFLen);
return true;
}