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Code Issues Releases Activity

generate GOST R 34.10 keys with param set

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orignal 2017-03-09 18:46:28 -05:00
parent 831c835106
commit 7f71d5dbd8
2 changed files with 32 additions and 16 deletions
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32
Signature.cpp
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@ -515,9 +515,23 @@ namespace crypto
~GOSTR3410Curve () ~GOSTR3410Curve ()
{ {
EC_GROUP_free (m_Group); EC_GROUP_free (m_Group);
} }
EC_POINT * MulP (const BIGNUM * n) const
{
BN_CTX * ctx = BN_CTX_new ();
auto p = EC_POINT_new (m_Group);
EC_POINT_mul (m_Group, p, n, nullptr, nullptr, ctx);
BN_CTX_free (ctx);
return p;
}
bool GetXY (const EC_POINT * p, BIGNUM * x, BIGNUM * y) const
{
return EC_POINT_get_affine_coordinates_GFp (m_Group, p, x, y, nullptr);
}
private: private:
EC_GROUP * m_Group; EC_GROUP * m_Group;
@ -579,7 +593,21 @@ namespace crypto
} }
return g_GOSTR3410Curves[paramSet]; return g_GOSTR3410Curves[paramSet];
} }
void CreateGOSTR3410RandomKeys (GOSTR3410ParamSet paramSet, uint8_t * signingPrivateKey, uint8_t * signingPublicKey)
{
RAND_bytes (signingPrivateKey, GOSTR3410_PUBLIC_KEY_LENGTH/2);
BIGNUM * priv = BN_bin2bn (signingPrivateKey, GOSTR3410_PUBLIC_KEY_LENGTH/2, nullptr);
const auto& curve = GetGOSTR3410Curve (paramSet);
auto pub = curve->MulP (priv);
BN_free (priv);
BIGNUM * x = BN_new (), * y = BN_new ();
curve->GetXY (pub, x, y);
EC_POINT_free (pub);
bn2buf (x, signingPublicKey, GOSTR3410_PUBLIC_KEY_LENGTH/2);
bn2buf (y, signingPublicKey + GOSTR3410_PUBLIC_KEY_LENGTH/2, GOSTR3410_PUBLIC_KEY_LENGTH/2);
BN_free (x); BN_free (y);
}
} }
} }

16
Signature.h
View File

@ -524,22 +524,10 @@ namespace crypto
EVP_PKEY * m_PrivateKey; EVP_PKEY * m_PrivateKey;
}; };
void CreateGOSTR3410RandomKeys (GOSTR3410ParamSet paramSet, uint8_t * signingPrivateKey, uint8_t * signingPublicKey);
inline void CreateGOSTR3410RandomKeys (uint8_t * signingPrivateKey, uint8_t * signingPublicKey) inline void CreateGOSTR3410RandomKeys (uint8_t * signingPrivateKey, uint8_t * signingPublicKey)
{ {
auto ctx = EVP_PKEY_CTX_new_id(NID_id_GostR3410_2001, nullptr); CreateGOSTR3410RandomKeys (eGOSTR3410CryptoProA, signingPrivateKey, signingPublicKey); // A by default
EVP_PKEY_keygen_init (ctx);
EVP_PKEY_CTX_ctrl_str (ctx, "paramset", "A"); // TODO should be in one place
EVP_PKEY* pkey = nullptr;
EVP_PKEY_keygen (ctx, &pkey);
const EC_KEY* ecKey = (const EC_KEY*) EVP_PKEY_get0(pkey);
bn2buf (EC_KEY_get0_private_key (ecKey), signingPrivateKey, GOSTR3410_PUBLIC_KEY_LENGTH/2);
BIGNUM * x = BN_new(), * y = BN_new();
EC_POINT_get_affine_coordinates_GFp (EC_KEY_get0_group(ecKey), EC_KEY_get0_public_key (ecKey), x, y, NULL);
bn2buf (x, signingPublicKey, GOSTR3410_PUBLIC_KEY_LENGTH/2);
bn2buf (y, signingPublicKey + GOSTR3410_PUBLIC_KEY_LENGTH/2, GOSTR3410_PUBLIC_KEY_LENGTH/2);
BN_free (x); BN_free (y);
EVP_PKEY_CTX_free (ctx);
EVP_PKEY_free (pkey);
} }
} }
} }