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eliminate dependancy from GOST engine for GOST R 34.10

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orignal 2017-03-10 13:21:22 -05:00
parent ba89c60b6d
commit 7caf3ea7d0
5 changed files with 3 additions and 71 deletions
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61
Crypto.cpp
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@ -802,70 +802,15 @@ namespace crypto
}
}*/
static ENGINE * g_GostEngine = nullptr;
static const EVP_MD * g_Gost3411 = nullptr;
static EVP_PKEY * g_GostPKEY = nullptr;
const EVP_PKEY * GetGostPKEY ()
{
return g_GostPKEY;
}
uint8_t * GOSTR3411 (const uint8_t * buf, size_t len, uint8_t * digest)
{
if (!g_Gost3411) return nullptr;
auto ctx = EVP_MD_CTX_new ();
EVP_DigestInit_ex (ctx, g_Gost3411, g_GostEngine);
EVP_DigestUpdate (ctx, buf, len);
EVP_DigestFinal_ex (ctx, digest, nullptr);
EVP_MD_CTX_free (ctx);
// TODO: implement actual GOST R 34.11
// SHA-256 is used for testing only
SHA256 (buf, len, digest);
return digest;
}
bool InitGost ()
{
#ifndef OPENSSL_NO_ENGINE
#if (OPENSSL_VERSION_NUMBER < 0x010100000) || defined(LIBRESSL_VERSION_NUMBER)
ENGINE_load_builtin_engines ();
ENGINE_load_dynamic ();
#else
OPENSSL_init_crypto(OPENSSL_INIT_ENGINE_ALL_BUILTIN, NULL);
#endif
g_GostEngine = ENGINE_by_id ("gost");
if (!g_GostEngine) return false;
ENGINE_init (g_GostEngine);
ENGINE_set_default (g_GostEngine, ENGINE_METHOD_ALL);
g_Gost3411 = ENGINE_get_digest(g_GostEngine, NID_id_GostR3411_94);
auto ctx = EVP_PKEY_CTX_new_id(NID_id_GostR3410_2001, g_GostEngine);
if (!ctx) return false;
EVP_PKEY_keygen_init (ctx);
EVP_PKEY_CTX_ctrl_str (ctx, "paramset", "A"); // possible values 'A', 'B', 'C', 'XA', 'XB'
EVP_PKEY_keygen (ctx, &g_GostPKEY); // it seems only way to fill with correct params
EVP_PKEY_CTX_free (ctx);
return true;
#else
LogPrint (eLogError, "Can't initialize GOST. Engines are not supported");
return false;
#endif
}
void TerminateGost ()
{
if (g_GostPKEY)
EVP_PKEY_free (g_GostPKEY);
#ifndef OPENSSL_NO_ENGINE
if (g_GostEngine)
{
ENGINE_finish (g_GostEngine);
ENGINE_free (g_GostEngine);
#if (OPENSSL_VERSION_NUMBER < 0x010100000) || defined(LIBRESSL_VERSION_NUMBER)
ENGINE_cleanup();
#endif
}
#endif
}
void InitCrypto (bool precomputation, bool withGost)
{