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