private void HandleMessage(KeyExchangeDhInitMessage message)
{
var kexAlg = _keyExchangeAlgorithms[_exchangeContext.KeyExchange]();
var hostKeyAlg = _publicKeyAlgorithms[_exchangeContext.PublicKey](_hostKey[_exchangeContext.PublicKey].ToString());
var clientCipher = _encryptionAlgorithms[_exchangeContext.ClientEncryption]();
var serverCipher = _encryptionAlgorithms[_exchangeContext.ServerEncryption]();
var serverHmac = _hmacAlgorithms[_exchangeContext.ServerHmac]();
var clientHmac = _hmacAlgorithms[_exchangeContext.ClientHmac]();
var clientExchangeValue = message.E;
var serverExchangeValue = kexAlg.CreateKeyExchange();
var sharedSecret = kexAlg.DecryptKeyExchange(clientExchangeValue);
var hostKeyAndCerts = hostKeyAlg.CreateKeyAndCertificatesData();
var exchangeHash = ComputeExchangeHash(kexAlg, hostKeyAndCerts, clientExchangeValue, serverExchangeValue, sharedSecret);
if (SessionId == null)
{
SessionId = exchangeHash;
}
var clientCipherIV = ComputeEncryptionKey(kexAlg, exchangeHash, clientCipher.BlockSize >> 3, sharedSecret, 'A');
var serverCipherIV = ComputeEncryptionKey(kexAlg, exchangeHash, serverCipher.BlockSize >> 3, sharedSecret, 'B');
var clientCipherKey = ComputeEncryptionKey(kexAlg, exchangeHash, clientCipher.KeySize >> 3, sharedSecret, 'C');
var serverCipherKey = ComputeEncryptionKey(kexAlg, exchangeHash, serverCipher.KeySize >> 3, sharedSecret, 'D');
var clientHmacKey = ComputeEncryptionKey(kexAlg, exchangeHash, clientHmac.KeySize >> 3, sharedSecret, 'E');
var serverHmacKey = ComputeEncryptionKey(kexAlg, exchangeHash, serverHmac.KeySize >> 3, sharedSecret, 'F');
_exchangeContext.NewAlgorithms = new Algorithms
{
KeyExchange = kexAlg,
PublicKey = hostKeyAlg,
ClientEncryption = clientCipher.Cipher(clientCipherKey, clientCipherIV, false),
ServerEncryption = serverCipher.Cipher(serverCipherKey, serverCipherIV, true),
ClientHmac = clientHmac.Hmac(clientHmacKey),
ServerHmac = serverHmac.Hmac(serverHmacKey),
ClientCompression = _compressionAlgorithms[_exchangeContext.ClientCompression](),
ServerCompression = _compressionAlgorithms[_exchangeContext.ServerCompression](),
};
var reply = new KeyExchangeDhReplyMessage
{
HostKey = hostKeyAndCerts,
F = serverExchangeValue,
Signature = hostKeyAlg.CreateSignatureData(exchangeHash),
};
SendMessage(reply);
SendMessage(new NewKeysMessage());
}
public void KeyExchangeDhReplyMessageConstructorTest()
{
KeyExchangeDhReplyMessage target = new KeyExchangeDhReplyMessage();
Assert.Inconclusive("TODO: Implement code to verify target");
}
