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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);
}
}
}

34
libi2pd/CryptoKey.h
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@ -24,6 +24,7 @@ namespace crypto
virtual bool Decrypt (const uint8_t * encrypted, uint8_t * data, BN_CTX * ctx) = 0; // 512 bytes encrypted, 222 bytes data
};
// ElGamal
class ElGamalEncryptor: public CryptoKeyEncryptor // for destination
{
public:
@ -48,6 +49,8 @@ namespace crypto
uint8_t m_PrivateKey[256];
};
// ECIES P256
class ECIESP256Encryptor: public CryptoKeyEncryptor
{
public:
@ -78,6 +81,37 @@ namespace crypto
};
void CreateECIESP256RandomKeys (uint8_t * priv, uint8_t * pub);
// ECIES GOST R 34.10
class ECIESGOSTR3410Encryptor: public CryptoKeyEncryptor
{
public:
ECIESGOSTR3410Encryptor (const uint8_t * pub);
~ECIESGOSTR3410Encryptor ();
void Encrypt (const uint8_t * data, uint8_t * encrypted, BN_CTX * ctx);
private:
EC_POINT * m_PublicKey;
};
class ECIESGOSTR3410Decryptor: public CryptoKeyDecryptor
{
public:
ECIESGOSTR3410Decryptor (const uint8_t * priv);
~ECIESGOSTR3410Decryptor ();
bool Decrypt (const uint8_t * encrypted, uint8_t * data, BN_CTX * ctx);
private:
BIGNUM * m_PrivateKey;
};
void CreateECIESGOSTR3410RandomKeys (uint8_t * priv, uint8_t * pub);
}
}

9
libi2pd/Identity.cpp
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@ -453,6 +453,9 @@ namespace data
case CRYPTO_KEY_TYPE_ECIES_P256_SHA256_AES256CBC:
return std::make_shared<i2p::crypto::ECIESP256Encryptor>(key);
break;
case CRYPTO_KEY_TYPE_ECIES_GOSTR3410_CRYPTO_PRO_A_SHA256_AES256CBC:
return std::make_shared<i2p::crypto::ECIESGOSTR3410Encryptor>(key);
break;
default:
LogPrint (eLogError, "Identity: Unknown crypto key type ", (int)GetCryptoKeyType ());
};
@ -601,6 +604,9 @@ namespace data
case CRYPTO_KEY_TYPE_ECIES_P256_SHA256_AES256CBC:
return std::make_shared<i2p::crypto::ECIESP256Decryptor>(key);
break;
case CRYPTO_KEY_TYPE_ECIES_GOSTR3410_CRYPTO_PRO_A_SHA256_AES256CBC:
return std::make_shared<i2p::crypto::ECIESGOSTR3410Decryptor>(key);
break;
default:
LogPrint (eLogError, "Identity: Unknown crypto key type ", (int)cryptoType);
};
@ -669,6 +675,9 @@ namespace data
case CRYPTO_KEY_TYPE_ECIES_P256_SHA256_AES256CBC:
i2p::crypto::CreateECIESP256RandomKeys (priv, pub);
break;
case CRYPTO_KEY_TYPE_ECIES_GOSTR3410_CRYPTO_PRO_A_SHA256_AES256CBC:
i2p::crypto::CreateECIESGOSTR3410RandomKeys (priv, pub);
break;
default:
LogPrint (eLogError, "Identity: Crypto key type ", (int)type, " is not supported");
}

1
libi2pd/Identity.h
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@ -54,6 +54,7 @@ namespace data
const uint16_t CRYPTO_KEY_TYPE_ELGAMAL = 0;
const uint16_t CRYPTO_KEY_TYPE_ECIES_P256_SHA256_AES256CBC = 65280; // TODO: change to actual code
const uint16_t CRYPTO_KEY_TYPE_ECIES_GOSTR3410_CRYPTO_PRO_A_SHA256_AES256CBC = 65281; // TODO: use GOST R 34.11 instead SHA256 and GOST 28147-89 instead AES
const uint16_t SIGNING_KEY_TYPE_DSA_SHA1 = 0;
const uint16_t SIGNING_KEY_TYPE_ECDSA_SHA256_P256 = 1;