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extract and verify LS2 transient key

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This commit is contained in:
orignal 2019-01-01 17:00:37 -05:00
parent 812e2814bc
commit bce4224d6e
6 changed files with 108 additions and 67 deletions

76
libi2pd/Identity.cpp
View file

@ -318,62 +318,56 @@ namespace data
return CRYPTO_KEY_TYPE_ELGAMAL;
}
void IdentityEx::CreateVerifier () const
i2p::crypto::Verifier * IdentityEx::CreateVerifier (uint16_t keyType)
{
if (m_Verifier) return; // don't create again
auto keyType = GetSigningKeyType ();
switch (keyType)
{
case SIGNING_KEY_TYPE_DSA_SHA1:
UpdateVerifier (new i2p::crypto::DSAVerifier (m_StandardIdentity.signingKey));
break;
return new i2p::crypto::DSAVerifier ();
case SIGNING_KEY_TYPE_ECDSA_SHA256_P256:
{
size_t padding = 128 - i2p::crypto::ECDSAP256_KEY_LENGTH; // 64 = 128 - 64
UpdateVerifier (new i2p::crypto::ECDSAP256Verifier (m_StandardIdentity.signingKey + padding));
break;
}
return new i2p::crypto::ECDSAP256Verifier ();
case SIGNING_KEY_TYPE_ECDSA_SHA384_P384:
{
size_t padding = 128 - i2p::crypto::ECDSAP384_KEY_LENGTH; // 32 = 128 - 96
UpdateVerifier (new i2p::crypto::ECDSAP384Verifier (m_StandardIdentity.signingKey + padding));
break;
}
return new i2p::crypto::ECDSAP384Verifier ();
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
UpdateVerifier (new i2p::crypto::ECDSAP521Verifier (signingKey));
break;
}
return new i2p::crypto::ECDSAP521Verifier ();
case SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519:
return new i2p::crypto::EDDSA25519Verifier ();
case SIGNING_KEY_TYPE_GOSTR3410_CRYPTO_PRO_A_GOSTR3411_256:
return new i2p::crypto::GOSTR3410_256_Verifier (i2p::crypto::eGOSTR3410CryptoProA);
case SIGNING_KEY_TYPE_GOSTR3410_TC26_A_512_GOSTR3411_512:
return new i2p::crypto::GOSTR3410_512_Verifier (i2p::crypto::eGOSTR3410TC26A512);
case SIGNING_KEY_TYPE_RSA_SHA256_2048:
case SIGNING_KEY_TYPE_RSA_SHA384_3072:
case SIGNING_KEY_TYPE_RSA_SHA512_4096:
LogPrint (eLogError, "Identity: RSA signing key type ", (int)keyType, " is not supported");
break;
case SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519:
{
size_t padding = 128 - i2p::crypto::EDDSA25519_PUBLIC_KEY_LENGTH; // 96 = 128 - 32
UpdateVerifier (new i2p::crypto::EDDSA25519Verifier (m_StandardIdentity.signingKey + padding));
break;
}
case SIGNING_KEY_TYPE_GOSTR3410_CRYPTO_PRO_A_GOSTR3411_256:
{
size_t padding = 128 - i2p::crypto::GOSTR3410_256_PUBLIC_KEY_LENGTH; // 64 = 128 - 64
UpdateVerifier (new i2p::crypto::GOSTR3410_256_Verifier (i2p::crypto::eGOSTR3410CryptoProA, m_StandardIdentity.signingKey + padding));
break;
}
case SIGNING_KEY_TYPE_GOSTR3410_TC26_A_512_GOSTR3411_512:
{
// zero padding
UpdateVerifier (new i2p::crypto::GOSTR3410_512_Verifier (i2p::crypto::eGOSTR3410TC26A512, m_StandardIdentity.signingKey));
break;
}
default:
LogPrint (eLogError, "Identity: Signing key type ", (int)keyType, " is not supported");
}
return nullptr;
}
void IdentityEx::CreateVerifier () const
{
if (m_Verifier) return; // don't create again
auto verifier = CreateVerifier (GetSigningKeyType ());
if (verifier)
{
auto keyLen = verifier->GetPublicKeyLen ();
if (keyLen <= 128)
verifier->SetPublicKey (m_StandardIdentity.signingKey + 128 - keyLen);
else
{
// for P521
uint8_t * signingKey = new uint8_t[keyLen];
memcpy (signingKey, m_StandardIdentity.signingKey, 128);
size_t excessLen = keyLen - 128;
memcpy (signingKey + 128, m_ExtendedBuffer + 4, excessLen); // right after signing and crypto key types
verifier->SetPublicKey (signingKey);
delete[] signingKey;
}
}
UpdateVerifier (verifier);
}
void IdentityEx::UpdateVerifier (i2p::crypto::Verifier * verifier) const