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i2pd
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ECDSA P384 and ECDSA P521 support

pull/113/head
orignal 10 years ago
parent
e0635548e9
commit
199ff0c210
3 changed files with 225 additions and 47 deletions
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  1. 123
      Identity.cpp
  2. 6
      Identity.h
  3. 143
      Signature.h

123
Identity.cpp
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@ -42,15 +42,50 @@ namespace data @@ -42,15 +42,50 @@ namespace data
IdentityEx::IdentityEx(const uint8_t * publicKey, const uint8_t * signingKey, SigningKeyType type)
{
memcpy (m_StandardIdentity.publicKey, publicKey, sizeof (m_StandardIdentity.publicKey));
if (type == SIGNING_KEY_TYPE_ECDSA_SHA256_P256)
if (type != SIGNING_KEY_TYPE_DSA_SHA1)
{
size_t excessLen = 0;
uint8_t * excessBuf = nullptr;
switch (type)
{
case SIGNING_KEY_TYPE_ECDSA_SHA256_P256:
{
size_t padding = 128 - i2p::crypto::ECDSAP256_KEY_LENGTH; // 64 = 128 - 64
memcpy (m_StandardIdentity.signingKey + padding, signingKey, i2p::crypto::ECDSAP256_KEY_LENGTH);
break;
}
case SIGNING_KEY_TYPE_ECDSA_SHA384_P384:
{
size_t padding = 128 - i2p::crypto::ECDSAP384_KEY_LENGTH; // 32 = 128 - 96
memcpy (m_StandardIdentity.signingKey + padding, signingKey, i2p::crypto::ECDSAP384_KEY_LENGTH);
break;
}
case SIGNING_KEY_TYPE_ECDSA_SHA512_P521:
{
memcpy (m_StandardIdentity.signingKey, signingKey, 128);
size_t excessLen = i2p::crypto::ECDSAP521_KEY_LENGTH - 128; // 4 = 132 - 128
excessBuf = new uint8_t[excessLen];
memcpy (excessBuf, signingKey + 128, excessLen);
break;
}
default:
LogPrint ("Signing key type ", (int)type, " is not supported");
}
memcpy (m_StandardIdentity.signingKey + 64, signingKey, 64);
// fill certificate
m_StandardIdentity.certificate.type = CERTIFICATE_TYPE_KEY;
m_ExtendedLen = 4; // 4 bytes extra
m_StandardIdentity.certificate.length = htobe16 (4);
m_StandardIdentity.certificate.length = htobe16 (m_ExtendedLen);
// fill extended buffer
m_ExtendedLen = 4 + excessLen; // 4 bytes extra + excess length
m_ExtendedBuffer = new uint8_t[m_ExtendedLen];
*(uint16_t *)m_ExtendedBuffer = htobe16 (SIGNING_KEY_TYPE_ECDSA_SHA256_P256);
*(uint16_t *)m_ExtendedBuffer = htobe16 (type);
*(uint16_t *)(m_ExtendedBuffer + 2) = htobe16 (CRYPTO_KEY_TYPE_ELGAMAL);
if (excessLen && excessBuf)
{
memcpy (m_ExtendedBuffer + 4, excessBuf, excessLen);
delete[] excessBuf;
}
// calculate ident hash
uint8_t buf[DEFAULT_IDENTITY_SIZE + 4];
ToBuffer (buf, DEFAULT_IDENTITY_SIZE + 4);
CryptoPP::SHA256().CalculateDigest(m_IdentHash, buf, GetFullLen ());
@ -188,6 +223,13 @@ namespace data @@ -188,6 +223,13 @@ namespace data
return be16toh (*(const uint16_t *)m_ExtendedBuffer); // signing key
return SIGNING_KEY_TYPE_DSA_SHA1;
}
CryptoKeyType IdentityEx::GetCryptoKeyType () const
{
if (m_StandardIdentity.certificate.type == CERTIFICATE_TYPE_KEY && m_ExtendedBuffer)
return be16toh (*(const uint16_t *)(m_ExtendedBuffer + 2)); // crypto key
return CRYPTO_KEY_TYPE_ELGAMAL;
}
void IdentityEx::CreateVerifier () const
{
@ -198,8 +240,26 @@ namespace data @@ -198,8 +240,26 @@ namespace data
m_Verifier = new i2p::crypto::DSAVerifier (m_StandardIdentity.signingKey);
break;
case SIGNING_KEY_TYPE_ECDSA_SHA256_P256:
m_Verifier = new i2p::crypto::ECDSAP256Verifier (m_StandardIdentity.signingKey + 64);
break;
{
size_t padding = 128 - i2p::crypto::ECDSAP256_KEY_LENGTH; // 64 = 128 - 64
m_Verifier = new i2p::crypto::ECDSAP256Verifier (m_StandardIdentity.signingKey + padding);
break;
}
case SIGNING_KEY_TYPE_ECDSA_SHA384_P384:
{
size_t padding = 128 - i2p::crypto::ECDSAP384_KEY_LENGTH; // 32 = 128 - 96
m_Verifier = new i2p::crypto::ECDSAP384Verifier (m_StandardIdentity.signingKey + padding);
break;
}
case SIGNING_KEY_TYPE_ECDSA_SHA512_P521:
{
uint8_t signingKey[i2p::crypto::ECDSAP521_KEY_LENGTH];
memcpy (signingKey, m_StandardIdentity.signingKey, 128);
size_t excessLen = i2p::crypto::ECDSAP521_KEY_LENGTH - 128; // 4 = 132- 128
memcpy (signingKey + 128, m_ExtendedBuffer + 4, excessLen); // right after signing and crypto key types
m_Verifier = new i2p::crypto::ECDSAP521Verifier (signingKey);
break;
}
default:
LogPrint ("Signing key type ", (int)keyType, " is not supported");
}
@ -211,6 +271,7 @@ namespace data @@ -211,6 +271,7 @@ namespace data
memcpy (m_PrivateKey, keys.privateKey, 256); // 256
memcpy (m_SigningPrivateKey, keys.signingPrivateKey, 20); // 20 - DSA
delete m_Signer;
m_Signer = nullptr;
CreateSigner ();
return *this;
}
@ -221,6 +282,7 @@ namespace data @@ -221,6 +282,7 @@ namespace data
memcpy (m_PrivateKey, other.m_PrivateKey, 256); // 256
memcpy (m_SigningPrivateKey, other.m_SigningPrivateKey, 128); // 128
delete m_Signer;
m_Signer = nullptr;
CreateSigner ();
return *this;
}
@ -234,6 +296,7 @@ namespace data @@ -234,6 +296,7 @@ namespace data
memcpy (m_SigningPrivateKey, buf + ret, signingPrivateKeySize);
ret += signingPrivateKeySize;
delete m_Signer;
m_Signer = nullptr;
CreateSigner ();
return ret;
}
@ -257,27 +320,55 @@ namespace data @@ -257,27 +320,55 @@ namespace data
void PrivateKeys::CreateSigner ()
{
if (m_Public.GetSigningKeyType () == SIGNING_KEY_TYPE_ECDSA_SHA256_P256)
m_Signer = new i2p::crypto::ECDSAP256Signer (m_SigningPrivateKey);
else
m_Signer = new i2p::crypto::DSASigner (m_SigningPrivateKey);
switch (m_Public.GetSigningKeyType ())
{
case SIGNING_KEY_TYPE_DSA_SHA1:
m_Signer = new i2p::crypto::DSASigner (m_SigningPrivateKey);
break;
case SIGNING_KEY_TYPE_ECDSA_SHA256_P256:
m_Signer = new i2p::crypto::ECDSAP256Signer (m_SigningPrivateKey);
break;
case SIGNING_KEY_TYPE_ECDSA_SHA384_P384:
m_Signer = new i2p::crypto::ECDSAP384Signer (m_SigningPrivateKey);
break;
case SIGNING_KEY_TYPE_ECDSA_SHA512_P521:
m_Signer = new i2p::crypto::ECDSAP521Signer (m_SigningPrivateKey);
break;
default:
LogPrint ("Signing key type ", (int)m_Public.GetSigningKeyType (), " is not supported");
}
}
PrivateKeys PrivateKeys::CreateRandomKeys (SigningKeyType type)
{
if (type == SIGNING_KEY_TYPE_ECDSA_SHA256_P256)
if (type != SIGNING_KEY_TYPE_DSA_SHA1)
{
PrivateKeys keys;
auto& rnd = i2p::context.GetRandomNumberGenerator ();
// signature
uint8_t signingPublicKey[i2p::crypto::ECDSAP521_KEY_LENGTH]; // 132 bytes is max key size now
switch (type)
{
case SIGNING_KEY_TYPE_ECDSA_SHA256_P256:
i2p::crypto::CreateECDSAP256RandomKeys (rnd, keys.m_SigningPrivateKey, signingPublicKey);
break;
case SIGNING_KEY_TYPE_ECDSA_SHA384_P384:
i2p::crypto::CreateECDSAP384RandomKeys (rnd, keys.m_SigningPrivateKey, signingPublicKey);
break;
case SIGNING_KEY_TYPE_ECDSA_SHA512_P521:
i2p::crypto::CreateECDSAP521RandomKeys (rnd, keys.m_SigningPrivateKey, signingPublicKey);
break;
default:
LogPrint ("Signing key type ", (int)type, " is not supported. Create DSA-SHA1");
return PrivateKeys (i2p::data::CreateRandomKeys ()); // DSA-SHA1
}
keys.CreateSigner ();
// encryption
uint8_t publicKey[256];
CryptoPP::DH dh (i2p::crypto::elgp, i2p::crypto::elgg);
dh.GenerateKeyPair(rnd, keys.m_PrivateKey, publicKey);
// signature
uint8_t signingPublicKey[64];
i2p::crypto::CreateECDSAP256RandomKeys (rnd, keys.m_SigningPrivateKey, signingPublicKey);
keys.m_Public = IdentityEx (publicKey, signingPublicKey, SIGNING_KEY_TYPE_ECDSA_SHA256_P256);
keys.CreateSigner ();
// identity
keys.m_Public = IdentityEx (publicKey, signingPublicKey, type);
return keys;
}
return PrivateKeys (i2p::data::CreateRandomKeys ()); // DSA-SHA1

6
Identity.h
Unescape View File

@ -102,11 +102,14 @@ namespace data @@ -102,11 +102,14 @@ namespace data
Keys CreateRandomKeys ();
const size_t DEFAULT_IDENTITY_SIZE = sizeof (Identity); // 387 bytes
const uint16_t CRYPTO_KEY_TYPE_ELGAMAL = 0;
const uint16_t SIGNING_KEY_TYPE_DSA_SHA1 = 0;
const uint16_t SIGNING_KEY_TYPE_ECDSA_SHA256_P256 = 1;
const uint16_t SIGNING_KEY_TYPE_ECDSA_SHA384_P384 = 2;
const uint16_t SIGNING_KEY_TYPE_ECDSA_SHA512_P521 = 3;
typedef uint16_t SigningKeyType;
typedef uint16_t CryptoKeyType;
class IdentityEx
{
@ -131,6 +134,7 @@ namespace data @@ -131,6 +134,7 @@ namespace data
size_t GetSignatureLen () const;
bool Verify (const uint8_t * buf, size_t len, const uint8_t * signature) const;
SigningKeyType GetSigningKeyType () const;
CryptoKeyType GetCryptoKeyType () const;
private:

143
Signature.h
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@ -87,67 +87,150 @@ namespace crypto @@ -87,67 +87,150 @@ namespace crypto
publicKey.GetPublicElement ().Encode (signingPublicKey, DSA_PUBLIC_KEY_LENGTH);
}
const size_t ECDSAP256_PUBLIC_KEY_LENGTH = 64;
const size_t ECDSAP256_PUBLIC_KEY_HALF_LENGTH = ECDSAP256_PUBLIC_KEY_LENGTH/2;
const size_t ECDSAP256_SIGNATURE_LENGTH = 64;
const size_t ECDSAP256_PRIVATE_KEY_LENGTH = ECDSAP256_SIGNATURE_LENGTH/2;
class ECDSAP256Verifier: public Verifier
{
template<typename Hash, size_t keyLen>
class ECDSAVerifier: public Verifier
{
public:
ECDSAP256Verifier (const uint8_t * signingKey)
template<typename Curve>
ECDSAVerifier (Curve curve, const uint8_t * signingKey)
{
m_PublicKey.Initialize (CryptoPP::ASN1::secp256r1(),
CryptoPP::ECP::Point (CryptoPP::Integer (signingKey, ECDSAP256_PUBLIC_KEY_HALF_LENGTH),
CryptoPP::Integer (signingKey + ECDSAP256_PUBLIC_KEY_HALF_LENGTH, ECDSAP256_PUBLIC_KEY_HALF_LENGTH)));
}
m_PublicKey.Initialize (curve,
CryptoPP::ECP::Point (CryptoPP::Integer (signingKey, keyLen/2),
CryptoPP::Integer (signingKey + keyLen/2, keyLen/2)));
}
bool Verify (const uint8_t * buf, size_t len, const uint8_t * signature) const
{
CryptoPP::ECDSA<CryptoPP::ECP, CryptoPP::SHA256>::Verifier verifier (m_PublicKey);
return verifier.VerifyMessage (buf, len, signature, ECDSAP256_SIGNATURE_LENGTH);
typename CryptoPP::ECDSA<CryptoPP::ECP, Hash>::Verifier verifier (m_PublicKey);
return verifier.VerifyMessage (buf, len, signature, keyLen); // signature length
}
size_t GetPublicKeyLen () const { return ECDSAP256_PUBLIC_KEY_LENGTH; };
size_t GetSignatureLen () const { return ECDSAP256_SIGNATURE_LENGTH; };
size_t GetPublicKeyLen () const { return keyLen; };
size_t GetSignatureLen () const { return keyLen; }; // signature length = key length
private:
CryptoPP::ECDSA<CryptoPP::ECP, CryptoPP::SHA256>::PublicKey m_PublicKey;
};
typename CryptoPP::ECDSA<CryptoPP::ECP, Hash>::PublicKey m_PublicKey;
};
class ECDSAP256Signer: public Signer
template<typename Hash>
class ECDSASigner: public Signer
{
public:
ECDSAP256Signer (const uint8_t * signingPrivateKey)
template<typename Curve>
ECDSASigner (Curve curve, const uint8_t * signingPrivateKey, size_t keyLen)
{
m_PrivateKey.Initialize (CryptoPP::ASN1::secp256r1(), CryptoPP::Integer (signingPrivateKey, ECDSAP256_PRIVATE_KEY_LENGTH));
m_PrivateKey.Initialize (curve, CryptoPP::Integer (signingPrivateKey, keyLen/2)); // private key length
}
void Sign (CryptoPP::RandomNumberGenerator& rnd, const uint8_t * buf, int len, uint8_t * signature) const
{
CryptoPP::ECDSA<CryptoPP::ECP, CryptoPP::SHA256>::Signer signer (m_PrivateKey);
typename CryptoPP::ECDSA<CryptoPP::ECP, Hash>::Signer signer (m_PrivateKey);
signer.SignMessage (rnd, buf, len, signature);
}
private:
CryptoPP::ECDSA<CryptoPP::ECP, CryptoPP::SHA256>::PrivateKey m_PrivateKey;
typename CryptoPP::ECDSA<CryptoPP::ECP, Hash>::PrivateKey m_PrivateKey;
};
inline void CreateECDSAP256RandomKeys (CryptoPP::RandomNumberGenerator& rnd, uint8_t * signingPrivateKey, uint8_t * signingPublicKey)
template<typename Hash, typename Curve>
inline void CreateECDSARandomKeys (CryptoPP::RandomNumberGenerator& rnd, Curve curve,
size_t keyLen, uint8_t * signingPrivateKey, uint8_t * signingPublicKey)
{
CryptoPP::ECDSA<CryptoPP::ECP, CryptoPP::SHA256>::PrivateKey privateKey;
CryptoPP::ECDSA<CryptoPP::ECP, CryptoPP::SHA256>::PublicKey publicKey;
privateKey.Initialize (rnd, CryptoPP::ASN1::secp256r1());
typename CryptoPP::ECDSA<CryptoPP::ECP, Hash>::PrivateKey privateKey;
typename CryptoPP::ECDSA<CryptoPP::ECP, Hash>::PublicKey publicKey;
privateKey.Initialize (rnd, curve);
privateKey.MakePublicKey (publicKey);
privateKey.GetPrivateExponent ().Encode (signingPrivateKey, ECDSAP256_PRIVATE_KEY_LENGTH);
privateKey.GetPrivateExponent ().Encode (signingPrivateKey, keyLen/2);
auto q = publicKey.GetPublicElement ();
q.x.Encode (signingPublicKey, ECDSAP256_PUBLIC_KEY_HALF_LENGTH);
q.y.Encode (signingPublicKey + ECDSAP256_PUBLIC_KEY_HALF_LENGTH, ECDSAP256_PUBLIC_KEY_HALF_LENGTH);
q.x.Encode (signingPublicKey, keyLen/2);
q.y.Encode (signingPublicKey + keyLen/2, keyLen/2);
}
// ECDSA_SHA256_P256
const size_t ECDSAP256_KEY_LENGTH = 64;
class ECDSAP256Verifier: public ECDSAVerifier<CryptoPP::SHA256, ECDSAP256_KEY_LENGTH>
{
public:
ECDSAP256Verifier (const uint8_t * signingKey):
ECDSAVerifier (CryptoPP::ASN1::secp256r1(), signingKey)
{
}
};
class ECDSAP256Signer: public ECDSASigner<CryptoPP::SHA256>
{
public:
ECDSAP256Signer (const uint8_t * signingPrivateKey):
ECDSASigner (CryptoPP::ASN1::secp256r1(), signingPrivateKey, ECDSAP256_KEY_LENGTH)
{
}
};
inline void CreateECDSAP256RandomKeys (CryptoPP::RandomNumberGenerator& rnd, uint8_t * signingPrivateKey, uint8_t * signingPublicKey)
{
CreateECDSARandomKeys<CryptoPP::SHA256> (rnd, CryptoPP::ASN1::secp256r1(), ECDSAP256_KEY_LENGTH, signingPrivateKey, signingPublicKey);
}
// ECDSA_SHA384_P384
const size_t ECDSAP384_KEY_LENGTH = 96;
class ECDSAP384Verifier: public ECDSAVerifier<CryptoPP::SHA384, ECDSAP384_KEY_LENGTH>
{
public:
ECDSAP384Verifier (const uint8_t * signingKey):
ECDSAVerifier (CryptoPP::ASN1::secp384r1(), signingKey)
{
}
};
class ECDSAP384Signer: public ECDSASigner<CryptoPP::SHA384>
{
public:
ECDSAP384Signer (const uint8_t * signingPrivateKey):
ECDSASigner (CryptoPP::ASN1::secp384r1(), signingPrivateKey, ECDSAP384_KEY_LENGTH)
{
}
};
inline void CreateECDSAP384RandomKeys (CryptoPP::RandomNumberGenerator& rnd, uint8_t * signingPrivateKey, uint8_t * signingPublicKey)
{
CreateECDSARandomKeys<CryptoPP::SHA384> (rnd, CryptoPP::ASN1::secp384r1(), ECDSAP384_KEY_LENGTH, signingPrivateKey, signingPublicKey);
}
// ECDSA_SHA512_P521
const size_t ECDSAP521_KEY_LENGTH = 132;
class ECDSAP521Verifier: public ECDSAVerifier<CryptoPP::SHA512, ECDSAP521_KEY_LENGTH>
{
public:
ECDSAP521Verifier (const uint8_t * signingKey):
ECDSAVerifier (CryptoPP::ASN1::secp521r1(), signingKey)
{
}
};
class ECDSAP521Signer: public ECDSASigner<CryptoPP::SHA512>
{
public:
ECDSAP521Signer (const uint8_t * signingPrivateKey):
ECDSASigner (CryptoPP::ASN1::secp521r1(), signingPrivateKey, ECDSAP521_KEY_LENGTH)
{
}
};
inline void CreateECDSAP521RandomKeys (CryptoPP::RandomNumberGenerator& rnd, uint8_t * signingPrivateKey, uint8_t * signingPublicKey)
{
CreateECDSARandomKeys<CryptoPP::SHA512> (rnd, CryptoPP::ASN1::secp521r1(), ECDSAP521_KEY_LENGTH, signingPrivateKey, signingPublicKey);
}
}
}

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