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set correct curve parameters for GOST R 34.10

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orignal 2017-02-19 14:45:10 -05:00
parent d75b916153
commit 1cb89ce20d
3 changed files with 26 additions and 16 deletions
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22
Crypto.cpp
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@ -803,17 +803,18 @@ namespace crypto
static ENGINE * g_GostEngine = nullptr;
static const EVP_MD * g_Gost3411 = nullptr;
ENGINE * GetGostEngine ()
static EVP_PKEY * g_GostPKEY = nullptr;
const EVP_PKEY * GetGostPKEY ()
{
return g_GostEngine;
}
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, GetGostEngine ());
EVP_DigestInit_ex (ctx, g_Gost3411, g_GostEngine);
EVP_DigestUpdate (ctx, buf, len);
EVP_DigestFinal_ex (ctx, digest, nullptr);
EVP_MD_CTX_free (ctx);
@ -833,13 +834,20 @@ namespace crypto
ENGINE_init (g_GostEngine);
ENGINE_set_default (g_GostEngine, ENGINE_METHOD_ALL);
ENGINE_ctrl_cmd_string(g_GostEngine, "CRYPT_PARAMS", "id-Gost28147-89-CryptoPro-A-ParamSet", 0);
g_Gost3411 = ENGINE_get_digest(g_GostEngine, NID_id_GostR3411_94);
auto ctx = EVP_PKEY_CTX_new_id(NID_id_GostR3410_2001, g_GostEngine);
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;
}
void TerminateGost ()
{
if (g_GostPKEY)
EVP_PKEY_free (g_GostPKEY);
if (g_GostEngine)
{
ENGINE_finish (g_GostEngine);