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crypter: hook up the new aes cbc classes

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Cory Fields 2015-03-20 01:10:30 -04:00 committed by Pieter Wuille
parent fb96831c1f
commit 9049cde4d9
1 changed files with 14 additions and 31 deletions
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45
src/wallet/crypter.cpp
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@ -4,6 +4,7 @@
#include "crypter.h"
#include "crypto/aes.h"
#include "script/script.h"
#include "script/standard.h"
#include "util.h"
@ -53,24 +54,15 @@ bool CCrypter::Encrypt(const CKeyingMaterial& vchPlaintext, std::vector<unsigned
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);
// n + AES_BLOCKSIZE bytes
vchCiphertext.resize(vchPlaintext.size() + AES_BLOCKSIZE);
EVP_CIPHER_CTX ctx;
AES256CBCEncrypt enc(chKey, chIV, true);
size_t nLen = enc.Encrypt(&vchPlaintext[0], vchPlaintext.size(), &vchCiphertext[0]);
if(nLen < vchPlaintext.size())
return false;
vchCiphertext.resize(nLen);
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;
}
@ -81,23 +73,14 @@ bool CCrypter::Decrypt(const std::vector<unsigned char>& vchCiphertext, CKeyingM
// plaintext will always be equal to or lesser than length of ciphertext
int nLen = vchCiphertext.size();
int nPLen = nLen, nFLen = 0;
vchPlaintext = CKeyingMaterial(nPLen);
vchPlaintext.resize(nLen);
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) != 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);
AES256CBCDecrypt dec(chKey, chIV, true);
nLen = dec.Decrypt(&vchCiphertext[0], vchCiphertext.size(), &vchPlaintext[0]);
if(nLen == 0)
return false;
vchPlaintext.resize(nLen);
return true;
}