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i2pd
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support of GOST 34.10-2012 512 bits

pull/827/head
orignal 8 years ago
parent
5bcc5ff873
commit
e877247032
4 changed files with 57 additions and 16 deletions
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  1. 1
      Gost.cpp
  2. 2
      Gost.h
  3. 12
      Identity.cpp
  4. 58
      Signature.h

1
Gost.cpp
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@ -12,6 +12,7 @@ namespace crypto @@ -12,6 +12,7 @@ namespace crypto
GOSTR3410Curve::GOSTR3410Curve (BIGNUM * a, BIGNUM * b, BIGNUM * p, BIGNUM * q, BIGNUM * x, BIGNUM * y)
{
m_KeyLen = BN_num_bytes (p);
BN_CTX * ctx = BN_CTX_new ();
m_Group = EC_GROUP_new_curve_GFp (p, a, b, ctx);
EC_POINT * P = EC_POINT_new (m_Group);

2
Gost.h
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@ -33,6 +33,7 @@ namespace crypto @@ -33,6 +33,7 @@ namespace crypto
GOSTR3410Curve (BIGNUM * a, BIGNUM * b, BIGNUM * p, BIGNUM * q, BIGNUM * x, BIGNUM * y);
~GOSTR3410Curve ();
size_t GetKeyLen () const { return m_KeyLen; };
EC_POINT * MulP (const BIGNUM * n) const;
bool GetXY (const EC_POINT * p, BIGNUM * x, BIGNUM * y) const;
EC_POINT * CreatePoint (const BIGNUM * x, const BIGNUM * y) const;
@ -42,6 +43,7 @@ namespace crypto @@ -42,6 +43,7 @@ namespace crypto
private:
EC_GROUP * m_Group;
size_t m_KeyLen; // in bytes
};
std::unique_ptr<GOSTR3410Curve>& GetGOSTR3410Curve (GOSTR3410ParamSet paramSet);

12
Identity.cpp
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@ -382,19 +382,19 @@ namespace data @@ -382,19 +382,19 @@ namespace data
case SIGNING_KEY_TYPE_GOSTR3410_A_GOSTR3411:
{
size_t padding = 128 - i2p::crypto::GOSTR3410_PUBLIC_KEY_LENGTH; // 64 = 128 - 64
UpdateVerifier (new i2p::crypto::GOSTR3410Verifier (i2p::crypto::eGOSTR3410CryptoProA, m_StandardIdentity.signingKey + padding));
UpdateVerifier (new i2p::crypto::GOSTR3410_2001_Verifier (i2p::crypto::eGOSTR3410CryptoProA, m_StandardIdentity.signingKey + padding));
break;
}
case SIGNING_KEY_TYPE_GOSTR3410_B_GOSTR3411:
{
size_t padding = 128 - i2p::crypto::GOSTR3410_PUBLIC_KEY_LENGTH; // 64 = 128 - 64
UpdateVerifier (new i2p::crypto::GOSTR3410Verifier (i2p::crypto::eGOSTR3410CryptoProB, m_StandardIdentity.signingKey + padding));
UpdateVerifier (new i2p::crypto::GOSTR3410_2001_Verifier (i2p::crypto::eGOSTR3410CryptoProB, m_StandardIdentity.signingKey + padding));
break;
}
case SIGNING_KEY_TYPE_GOSTR3410_C_GOSTR3411:
{
size_t padding = 128 - i2p::crypto::GOSTR3410_PUBLIC_KEY_LENGTH; // 64 = 128 - 64
UpdateVerifier (new i2p::crypto::GOSTR3410Verifier (i2p::crypto::eGOSTR3410CryptoProC, m_StandardIdentity.signingKey + padding));
UpdateVerifier (new i2p::crypto::GOSTR3410_2001_Verifier (i2p::crypto::eGOSTR3410CryptoProC, m_StandardIdentity.signingKey + padding));
break;
}
default:
@ -539,13 +539,13 @@ namespace data @@ -539,13 +539,13 @@ namespace data
m_Signer.reset (new i2p::crypto::EDDSA25519Signer (m_SigningPrivateKey, m_Public->GetStandardIdentity ().certificate - i2p::crypto::EDDSA25519_PUBLIC_KEY_LENGTH));
break;
case SIGNING_KEY_TYPE_GOSTR3410_A_GOSTR3411:
m_Signer.reset (new i2p::crypto::GOSTR3410Signer (i2p::crypto::eGOSTR3410CryptoProA, m_SigningPrivateKey));
m_Signer.reset (new i2p::crypto::GOSTR3410_2001_Signer (i2p::crypto::eGOSTR3410CryptoProA, m_SigningPrivateKey));
break;
case SIGNING_KEY_TYPE_GOSTR3410_B_GOSTR3411:
m_Signer.reset (new i2p::crypto::GOSTR3410Signer (i2p::crypto::eGOSTR3410CryptoProB, m_SigningPrivateKey));
m_Signer.reset (new i2p::crypto::GOSTR3410_2001_Signer (i2p::crypto::eGOSTR3410CryptoProB, m_SigningPrivateKey));
break;
case SIGNING_KEY_TYPE_GOSTR3410_C_GOSTR3411:
m_Signer.reset (new i2p::crypto::GOSTR3410Signer (i2p::crypto::eGOSTR3410CryptoProC, m_SigningPrivateKey));
m_Signer.reset (new i2p::crypto::GOSTR3410_2001_Signer (i2p::crypto::eGOSTR3410CryptoProC, m_SigningPrivateKey));
break;
default:
LogPrint (eLogError, "Identity: Signing key type ", (int)m_Public->GetSigningKeyType (), " is not supported");

58
Signature.h
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@ -443,11 +443,43 @@ namespace crypto @@ -443,11 +443,43 @@ namespace crypto
memcpy (signingPublicKey, signer.GetPublicKey (), EDDSA25519_PUBLIC_KEY_LENGTH);
}
// ГОСТ Р 34.10-2001
// ГОСТ Р 34.11
struct GOSTR3411_2001_Hash
{
static void CalculateHash (const uint8_t * buf, size_t len, uint8_t * digest)
{
SHA256 (buf, len, digest); // TODO: implement GOST R 34.11 - 2001
}
enum { hashLen = 32 };
};
struct GOSTR3411_2012_256_Hash
{
static void CalculateHash (const uint8_t * buf, size_t len, uint8_t * digest)
{
SHA256 (buf, len, digest); // TODO: implement GOST R 34.11 - 2012
}
enum { hashLen = 32 };
};
struct GOSTR3411_2012_512_Hash
{
static void CalculateHash (const uint8_t * buf, size_t len, uint8_t * digest)
{
SHA512 (buf, len, digest); // TODO: implement GOST R 34.11 - 2012
}
enum { hashLen = 32 };
};
// ГОСТ Р 34.10
const size_t GOSTR3410_PUBLIC_KEY_LENGTH = 64;
const size_t GOSTR3410_SIGNATURE_LENGTH = 64;
template<typename Hash>
class GOSTR3410Verifier: public Verifier
{
public:
@ -463,8 +495,8 @@ namespace crypto @@ -463,8 +495,8 @@ namespace crypto
bool Verify (const uint8_t * buf, size_t len, const uint8_t * signature) const
{
uint8_t digest[32];
SHA256 (buf, len, digest); // TODO: use GOST 34.11
uint8_t digest[Hash::hashLen];
Hash::CalculateHash (buf, len, digest);
BIGNUM * d = BN_bin2bn (digest, 32, nullptr);
BIGNUM * r = BN_bin2bn (signature, GetSignatureLen ()/2, NULL);
BIGNUM * s = BN_bin2bn (signature + GetSignatureLen ()/2, GetSignatureLen ()/2, NULL);
@ -482,6 +514,7 @@ namespace crypto @@ -482,6 +514,7 @@ namespace crypto
EC_POINT * m_PublicKey;
};
template<typename Hash>
class GOSTR3410Signer: public Signer
{
public:
@ -495,8 +528,8 @@ namespace crypto @@ -495,8 +528,8 @@ namespace crypto
void Sign (const uint8_t * buf, int len, uint8_t * signature) const
{
uint8_t digest[32];
SHA256 (buf, len, digest); // TODO: use GOST 34.11
uint8_t digest[Hash::hashLen];
Hash::CalculateHash (buf, len, digest);
BIGNUM * d = BN_bin2bn (digest, 32, nullptr);
BIGNUM * r = BN_new (), * s = BN_new ();
GetGOSTR3410Curve (m_ParamSet)->Sign (m_PrivateKey, d, r, s);
@ -513,18 +546,23 @@ namespace crypto @@ -513,18 +546,23 @@ namespace crypto
inline 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 keyLen = curve->GetKeyLen ();
RAND_bytes (signingPrivateKey, keyLen);
BIGNUM * priv = BN_bin2bn (signingPrivateKey, keyLen, nullptr);
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);
bn2buf (x, signingPublicKey, keyLen);
bn2buf (y, signingPublicKey + keyLen, keyLen);
BN_free (x); BN_free (y);
}
typedef GOSTR3410Verifier<GOSTR3411_2001_Hash> GOSTR3410_2001_Verifier;
typedef GOSTR3410Signer<GOSTR3411_2001_Hash> GOSTR3410_2001_Signer;
}
}

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