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ECIES for GOST R 34.10

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orignal 2017-11-09 15:01:07 -05:00
parent 1e75de9bb8
commit ab1cd3f5cf
4 changed files with 106 additions and 2 deletions
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62
libi2pd/CryptoKey.cpp
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@ -1,5 +1,6 @@
#include <string.h>
#include "Log.h"
#include "Gost.h"
#include "CryptoKey.h"
namespace i2p
@ -65,7 +66,7 @@ namespace crypto
{
if (m_Curve && m_PrivateKey)
return ECIESDecrypt (m_Curve, m_PrivateKey, encrypted, data, ctx);
return false;;
return false;
}
void CreateECIESP256RandomKeys (uint8_t * priv, uint8_t * pub)
@ -86,6 +87,65 @@ namespace crypto
BN_free (x); BN_free (y);
EC_GROUP_free (curve);
}
ECIESGOSTR3410Encryptor::ECIESGOSTR3410Encryptor (const uint8_t * pub)
{
auto& curve = GetGOSTR3410Curve (eGOSTR3410CryptoProA);
m_PublicKey = EC_POINT_new (curve->GetGroup ());
BIGNUM * x = BN_bin2bn (pub, 32, nullptr);
BIGNUM * y = BN_bin2bn (pub + 32, 32, nullptr);
if (!EC_POINT_set_affine_coordinates_GFp (curve->GetGroup (), m_PublicKey, x, y, nullptr))
LogPrint (eLogError, "ECICS GOST R 34.10 invalid public key");
BN_free (x); BN_free (y);
}
ECIESGOSTR3410Encryptor::~ECIESGOSTR3410Encryptor ()
{
if (m_PublicKey) EC_POINT_free (m_PublicKey);
}
void ECIESGOSTR3410Encryptor::Encrypt (const uint8_t * data, uint8_t * encrypted, BN_CTX * ctx)
{
if (m_PublicKey)
ECIESEncrypt (GetGOSTR3410Curve (eGOSTR3410CryptoProA)->GetGroup (), m_PublicKey, data, encrypted, ctx);
}
ECIESGOSTR3410Decryptor::ECIESGOSTR3410Decryptor (const uint8_t * priv)
{
m_PrivateKey = BN_bin2bn (priv, 32, nullptr);
}
ECIESGOSTR3410Decryptor::~ECIESGOSTR3410Decryptor ()
{
if (m_PrivateKey) BN_free (m_PrivateKey);
}
bool ECIESGOSTR3410Decryptor::Decrypt (const uint8_t * encrypted, uint8_t * data, BN_CTX * ctx)
{
if (m_PrivateKey)
return ECIESDecrypt (GetGOSTR3410Curve (eGOSTR3410CryptoProA)->GetGroup (), m_PrivateKey, encrypted, data, ctx);
return false;
}
void CreateECIESGOSTR3410RandomKeys (uint8_t * priv, uint8_t * pub)
{
auto& curve = GetGOSTR3410Curve (eGOSTR3410CryptoProA);
EC_POINT * p = nullptr;
BIGNUM * key = nullptr;
GenerateECIESKeyPair (curve->GetGroup (), key, p);
bn2buf (key, priv, 32);
RAND_bytes (priv + 32, 224);
BN_free (key);
BIGNUM * x = BN_new (), * y = BN_new ();
EC_POINT_get_affine_coordinates_GFp (curve->GetGroup (), p, x, y, NULL);
bn2buf (x, pub, 32);
bn2buf (y, pub + 32, 32);
RAND_bytes (priv + 64, 192);
EC_POINT_free (p);
BN_free (x); BN_free (y);
}
}
}