int SelfTestGost14Cbc()
{
const size_t svLen = sizeof(kSeltTestGost14CbcSV) / sizeof(kSeltTestGost14CbcSV[0]);
unsigned char outText[textLen14];
unsigned char outTextDec[textLen14];
unsigned char ctx[kCbc14ContextLen];
if (init_cbc_14_impl(kSeltTestGost14MasterKeyData, ctx, kSeltTestGost14CbcSV, svLen))
return -1;
if (encrypt_cbc(ctx, kSeltTestGost14PlainText, outText, textLen14))
return -1;
free_cbc(ctx);
if (init_cbc_14_impl(kSeltTestGost14MasterKeyData, ctx, kSeltTestGost14CbcSV, svLen))
return -1;
if (decrypt_cbc(ctx, outText, outTextDec, textLen14))
return -1;
free_cbc(ctx);
if (memcmp(outTextDec, kSeltTestGost14PlainText, textLen14))
return -1;
return memcmp(outText, kSeltTestGost14CbcEncText, textLen14);
}
bool CCrypt::setKey(const BYTE *pKey, size_t cbKeyLen)
{
// full external key. decode & check password
if (cbKeyLen != sizeof(ExternalKey))
return false;
BYTE tmpHash[32];
slow_hash(m_password, m_password.GetLength(), tmpHash);
BYTE ctx[kCbc14ContextLen];
init_cbc_14(tmpHash, ctx, iv0, _countof(iv0));
ExternalKey tmp = { 0 };
decrypt_cbc(ctx, (BYTE*)pKey, (BYTE*)&tmp, sizeof(tmp));
free_cbc(ctx);
if (tmp.m_crc32 != crc32(0xAbbaDead, (LPCBYTE)m_password.GetString(), m_password.GetLength()))
return false;
memcpy(m_key, &tmp.m_key, KEY_LENGTH);
memcpy(m_iv, &tmp.m_iv, KEY_LENGTH);
init_cbc_14(m_key, m_ctx, m_iv, KEY_LENGTH);
return m_valid = true;
}
bool CCrypt::getKey(BYTE *pKey, size_t cbKeyLen)
{
if (!m_valid || cbKeyLen < sizeof(ExternalKey))
return false;
ExternalKey tmp = { 0 };
memcpy(&tmp.m_key, m_key, KEY_LENGTH);
memcpy(&tmp.m_iv, m_iv, KEY_LENGTH);
tmp.m_crc32 = crc32(0xAbbaDead, (LPCBYTE)m_password.GetString(), m_password.GetLength());
getRandomBytes(tmp.slack, sizeof(tmp.slack));
BYTE tmpHash[32];
slow_hash(m_password, m_password.GetLength(), tmpHash);
BYTE ctx[kCbc14ContextLen];
init_cbc_14(tmpHash, ctx, iv0, _countof(iv0));
bool val = !encrypt_cbc(ctx, (BYTE*)&tmp, pKey, cbKeyLen);
free_cbc(ctx);
return val;
}
static int afalg_destroy(ENGINE *e)
{
ERR_unload_AFALG_strings();
free_cbc();
return 1;
}