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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

32
Signature.cpp
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@ -515,9 +515,23 @@ namespace crypto
~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:
EC_GROUP * m_Group;
@ -579,7 +593,21 @@ namespace crypto
}
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);
}
}
}