public void ReadData()
{
ContentType type = (ContentType)TlsUtilities.ReadUint8(inStr);
TlsUtilities.CheckVersion(inStr, handler);
int size = TlsUtilities.ReadUint16(inStr);
byte[] buf = DecodeAndVerify(type, inStr, size);
handler.ProcessData(type, buf, 0, buf.Length);
}
private void processHandshake()
{
bool read;
do
{
read = false;
/*
* We need the first 4 bytes, they contain type and length of
* the message.
*/
if (handshakeQueue.Available >= 4)
{
byte[] beginning = new byte[4];
handshakeQueue.Read(beginning, 0, 4, 0);
MemoryStream bis = new MemoryStream(beginning, false);
short type = TlsUtilities.ReadUint8(bis);
int len = TlsUtilities.ReadUint24(bis);
/*
* Check if we have enough bytes in the buffer to read
* the full message.
*/
if (handshakeQueue.Available >= (len + 4))
{
/*
* Read the message.
*/
byte[] buf = new byte[len];
handshakeQueue.Read(buf, 0, len, 4);
handshakeQueue.RemoveData(len + 4);
/*
* If it is not a finished message, update our hashes
* we prepare for the finish message.
*/
if (type != HP_FINISHED)
{
rs.hash1.BlockUpdate(beginning, 0, 4);
rs.hash2.BlockUpdate(beginning, 0, 4);
rs.hash1.BlockUpdate(buf, 0, len);
rs.hash2.BlockUpdate(buf, 0, len);
}
/*
* Now, parse the message.
*/
MemoryStream inStr = new MemoryStream(buf, false);
/*
* Check the type.
*/
switch (type)
{
case HP_CERTIFICATE:
{
switch (connection_state)
{
case CS_SERVER_HELLO_RECEIVED:
{
/*
* Parse the certificates.
*/
Certificate cert = Certificate.Parse(inStr);
AssertEmpty(inStr);
X509CertificateStructure x509Cert = cert.certs[0];
SubjectPublicKeyInfo keyInfo = x509Cert.SubjectPublicKeyInfo;
try
{
this.serverPublicKey = PublicKeyFactory.CreateKey(keyInfo);
}
catch (Exception)
{
this.FailWithError(AL_fatal, AP_unsupported_certificate);
}
// Sanity check the PublicKeyFactory
if (this.serverPublicKey.IsPrivate)
{
this.FailWithError(AL_fatal, AP_internal_error);
}
/*
* Perform various checks per RFC2246 7.4.2
* TODO "Unless otherwise specified, the signing algorithm for the certificate
* must be the same as the algorithm for the certificate key."
*/
switch (this.chosenCipherSuite.KeyExchangeAlgorithm)
{
case TlsCipherSuite.KE_RSA:
if (!(this.serverPublicKey is RsaKeyParameters))
{
this.FailWithError(AL_fatal, AP_certificate_unknown);
}
validateKeyUsage(x509Cert, KeyUsage.KeyEncipherment);
break;
case TlsCipherSuite.KE_DHE_RSA:
if (!(this.serverPublicKey is RsaKeyParameters))
{
this.FailWithError(AL_fatal, AP_certificate_unknown);
}
validateKeyUsage(x509Cert, KeyUsage.DigitalSignature);
break;
case TlsCipherSuite.KE_DHE_DSS:
if (!(this.serverPublicKey is DsaPublicKeyParameters))
{
this.FailWithError(AL_fatal, AP_certificate_unknown);
}
break;
default:
this.FailWithError(AL_fatal, AP_unsupported_certificate);
break;
}
/*
* Verify them.
*/
if (!this.verifyer.IsValid(cert.GetCerts()))
{
this.FailWithError(AL_fatal, AP_user_canceled);
}
break;
}
default:
this.FailWithError(AL_fatal, AP_unexpected_message);
break;
}
connection_state = CS_SERVER_CERTIFICATE_RECEIVED;
read = true;
break;
}
case HP_FINISHED:
switch (connection_state)
{
case CS_SERVER_CHANGE_CIPHER_SPEC_RECEIVED:
/*
* Read the checksum from the finished message,
* it has always 12 bytes.
*/
byte[] receivedChecksum = new byte[12];
TlsUtilities.ReadFully(receivedChecksum, inStr);
AssertEmpty(inStr);
/*
* Calculate our own checksum.
*/
byte[] checksum = new byte[12];
byte[] md5andsha1 = new byte[16 + 20];
rs.hash2.DoFinal(md5andsha1, 0);
TlsUtilities.PRF(this.ms, TlsUtilities.ToByteArray("server finished"), md5andsha1, checksum);
/*
* Compare both checksums.
*/
for (int i = 0; i < receivedChecksum.Length; i++)
{
if (receivedChecksum[i] != checksum[i])
{
/*
* Wrong checksum in the finished message.
*/
this.FailWithError(AL_fatal, AP_handshake_failure);
}
}
connection_state = CS_DONE;
/*
* We are now ready to receive application data.
*/
this.appDataReady = true;
read = true;
break;
default:
this.FailWithError(AL_fatal, AP_unexpected_message);
break;
}
break;
case HP_SERVER_HELLO:
switch (connection_state)
{
case CS_CLIENT_HELLO_SEND:
/*
* Read the server hello message
*/
TlsUtilities.CheckVersion(inStr, this);
/*
* Read the server random
*/
this.serverRandom = new byte[32];
TlsUtilities.ReadFully(this.serverRandom, inStr);
/*
* Currently, we don't support session ids
*/
short sessionIdLength = TlsUtilities.ReadUint8(inStr);
byte[] sessionId = new byte[sessionIdLength];
TlsUtilities.ReadFully(sessionId, inStr);
/*
* Find out which ciphersuite the server has
* chosen. If we don't support this ciphersuite,
* the TlsCipherSuiteManager will throw an
* exception.
*/
this.chosenCipherSuite = TlsCipherSuiteManager.GetCipherSuite(
TlsUtilities.ReadUint16(inStr), this);
/*
* We support only the null compression which
* means no compression.
*/
short compressionMethod = TlsUtilities.ReadUint8(inStr);
if (compressionMethod != 0)
{
this.FailWithError(TlsProtocolHandler.AL_fatal, TlsProtocolHandler.AP_illegal_parameter);
}
AssertEmpty(inStr);
connection_state = CS_SERVER_HELLO_RECEIVED;
read = true;
break;
default:
this.FailWithError(AL_fatal, AP_unexpected_message);
break;
}
break;
case HP_SERVER_HELLO_DONE:
switch (connection_state)
{
case CS_SERVER_CERTIFICATE_RECEIVED:
case CS_SERVER_KEY_EXCHANGE_RECEIVED:
case CS_CERTIFICATE_REQUEST_RECEIVED:
// NB: Original code used case label fall-through
if (connection_state == CS_SERVER_CERTIFICATE_RECEIVED)
{
/*
* There was no server key exchange message, check
* that we are doing RSA key exchange.
*/
if (this.chosenCipherSuite.KeyExchangeAlgorithm != TlsCipherSuite.KE_RSA)
{
this.FailWithError(AL_fatal, AP_unexpected_message);
}
}
AssertEmpty(inStr);
bool isCertReq = (connection_state == CS_CERTIFICATE_REQUEST_RECEIVED);
connection_state = CS_SERVER_HELLO_DONE_RECEIVED;
if (isCertReq)
{
sendClientCertificate();
}
/*
* Send the client key exchange message, depending
* on the key exchange we are using in our
* ciphersuite.
*/
switch (this.chosenCipherSuite.KeyExchangeAlgorithm)
{
case TlsCipherSuite.KE_RSA:
{
/*
* We are doing RSA key exchange. We will
* choose a pre master secret and send it
* rsa encrypted to the server.
*
* Prepare pre master secret.
*/
pms = new byte[48];
pms[0] = 3;
pms[1] = 1;
random.NextBytes(pms, 2, 46);
/*
* Encode the pms and send it to the server.
*
* Prepare an Pkcs1Encoding with good random
* padding.
*/
RsaBlindedEngine rsa = new RsaBlindedEngine();
Pkcs1Encoding encoding = new Pkcs1Encoding(rsa);
encoding.Init(true, new ParametersWithRandom(this.serverPublicKey, this.random));
byte[] encrypted = null;
try
{
encrypted = encoding.ProcessBlock(pms, 0, pms.Length);
}
catch (InvalidCipherTextException)
{
/*
* This should never happen, only during decryption.
*/
this.FailWithError(AL_fatal, AP_internal_error);
}
/*
* Send the encrypted pms.
*/
sendClientKeyExchange(encrypted);
break;
}
case TlsCipherSuite.KE_DHE_DSS:
case TlsCipherSuite.KE_DHE_RSA:
{
/*
* Send the Client Key Exchange message for
* DHE key exchange.
*/
byte[] YcByte = BigIntegers.AsUnsignedByteArray(this.Yc);
sendClientKeyExchange(YcByte);
break;
}
default:
/*
* Problem during handshake, we don't know
* how to handle this key exchange method.
*/
this.FailWithError(AL_fatal, AP_unexpected_message);
break;
}
connection_state = CS_CLIENT_KEY_EXCHANGE_SEND;
/*
* Now, we send change cipher state
*/
byte[] cmessage = new byte[1];
cmessage[0] = 1;
rs.WriteMessage((short)RL_CHANGE_CIPHER_SPEC, cmessage, 0, cmessage.Length);
connection_state = CS_CLIENT_CHANGE_CIPHER_SPEC_SEND;
/*
* Calculate the ms
*/
this.ms = new byte[48];
byte[] randBytes = new byte[clientRandom.Length + serverRandom.Length];
Array.Copy(clientRandom, 0, randBytes, 0, clientRandom.Length);
Array.Copy(serverRandom, 0, randBytes, clientRandom.Length, serverRandom.Length);
TlsUtilities.PRF(pms, TlsUtilities.ToByteArray("master secret"), randBytes, this.ms);
/*
* Initialize our cipher suite
*/
rs.writeSuite = this.chosenCipherSuite;
rs.writeSuite.Init(this.ms, clientRandom, serverRandom);
/*
* Send our finished message.
*/
byte[] checksum = new byte[12];
byte[] md5andsha1 = new byte[16 + 20];
rs.hash1.DoFinal(md5andsha1, 0);
TlsUtilities.PRF(this.ms, TlsUtilities.ToByteArray("client finished"), md5andsha1, checksum);
MemoryStream bos2 = new MemoryStream();
TlsUtilities.WriteUint8(HP_FINISHED, bos2);
TlsUtilities.WriteUint24(12, bos2);
bos2.Write(checksum, 0, checksum.Length);
byte[] message2 = bos2.ToArray();
rs.WriteMessage((short)RL_HANDSHAKE, message2, 0, message2.Length);
this.connection_state = CS_CLIENT_FINISHED_SEND;
read = true;
break;
default:
this.FailWithError(AL_fatal, AP_handshake_failure);
break;
}
break;
case HP_SERVER_KEY_EXCHANGE:
{
switch (connection_state)
{
case CS_SERVER_CERTIFICATE_RECEIVED:
{
/*
* Check that we are doing DHE key exchange
*/
switch (this.chosenCipherSuite.KeyExchangeAlgorithm)
{
case TlsCipherSuite.KE_DHE_RSA:
{
processDHEKeyExchange(inStr, new TlsRsaSigner());
break;
}
case TlsCipherSuite.KE_DHE_DSS:
{
processDHEKeyExchange(inStr, new TlsDssSigner());
break;
}
default:
this.FailWithError(AL_fatal, AP_unexpected_message);
break;
}
break;
}
default:
this.FailWithError(AL_fatal, AP_unexpected_message);
break;
}
this.connection_state = CS_SERVER_KEY_EXCHANGE_RECEIVED;
read = true;
break;
}
case HP_CERTIFICATE_REQUEST:
switch (connection_state)
{
case CS_SERVER_CERTIFICATE_RECEIVED:
case CS_SERVER_KEY_EXCHANGE_RECEIVED:
{
// NB: Original code used case label fall-through
if (connection_state == CS_SERVER_CERTIFICATE_RECEIVED)
{
/*
* There was no server key exchange message, check
* that we are doing RSA key exchange.
*/
if (this.chosenCipherSuite.KeyExchangeAlgorithm != TlsCipherSuite.KE_RSA)
{
this.FailWithError(AL_fatal, AP_unexpected_message);
}
}
int typesLength = TlsUtilities.ReadUint8(inStr);
byte[] types = new byte[typesLength];
TlsUtilities.ReadFully(types, inStr);
int authsLength = TlsUtilities.ReadUint16(inStr);
byte[] auths = new byte[authsLength];
TlsUtilities.ReadFully(auths, inStr);
AssertEmpty(inStr);
break;
}
default:
this.FailWithError(AL_fatal, AP_unexpected_message);
break;
}
this.connection_state = CS_CERTIFICATE_REQUEST_RECEIVED;
read = true;
break;
case HP_HELLO_REQUEST:
case HP_CLIENT_KEY_EXCHANGE:
case HP_CERTIFICATE_VERIFY:
case HP_CLIENT_HELLO:
default:
// We do not support this!
this.FailWithError(AL_fatal, AP_unexpected_message);
break;
}
}
}
}while (read);
}
private void ProcessHandshakeMessage(HandshakeType type, byte[] buf)
{
MemoryStream inStr = new MemoryStream(buf, false);
/*
* Check the type.
*/
switch (type)
{
case HandshakeType.certificate:
{
switch (connection_state)
{
case CS_SERVER_HELLO_RECEIVED:
{
// Parse the Certificate message and send to cipher suite
Certificate serverCertificate = Certificate.Parse(inStr);
AssertEmpty(inStr);
this.keyExchange.ProcessServerCertificate(serverCertificate);
this.authentication = tlsClient.GetAuthentication();
this.authentication.NotifyServerCertificate(serverCertificate);
break;
}
default:
this.FailWithError(AlertLevel.fatal, AlertDescription.unexpected_message);
break;
}
connection_state = CS_SERVER_CERTIFICATE_RECEIVED;
break;
}
case HandshakeType.finished:
switch (connection_state)
{
case CS_SERVER_CHANGE_CIPHER_SPEC_RECEIVED:
/*
* Read the checksum from the finished message, it has always 12 bytes.
*/
byte[] serverVerifyData = new byte[12];
TlsUtilities.ReadFully(serverVerifyData, inStr);
AssertEmpty(inStr);
/*
* Calculate our own checksum.
*/
byte[] expectedServerVerifyData = TlsUtilities.PRF(
securityParameters.masterSecret, "server finished",
rs.GetCurrentHash(), 12);
/*
* Compare both checksums.
*/
if (!Arrays.ConstantTimeAreEqual(expectedServerVerifyData, serverVerifyData))
{
/*
* Wrong checksum in the finished message.
*/
this.FailWithError(AlertLevel.fatal, AlertDescription.handshake_failure);
}
connection_state = CS_DONE;
/*
* We are now ready to receive application data.
*/
this.appDataReady = true;
break;
default:
this.FailWithError(AlertLevel.fatal, AlertDescription.unexpected_message);
break;
}
break;
case HandshakeType.server_hello:
switch (connection_state)
{
case CS_CLIENT_HELLO_SEND:
/*
* Read the server hello message
*/
TlsUtilities.CheckVersion(inStr, this);
/*
* Read the server random
*/
securityParameters.serverRandom = new byte[32];
TlsUtilities.ReadFully(securityParameters.serverRandom, inStr);
byte[] sessionID = TlsUtilities.ReadOpaque8(inStr);
if (sessionID.Length > 32)
{
this.FailWithError(AlertLevel.fatal, AlertDescription.illegal_parameter);
}
this.tlsClient.NotifySessionID(sessionID);
/*
* Find out which CipherSuite the server has chosen and check that
* it was one of the offered ones.
*/
CipherSuite selectedCipherSuite = (CipherSuite)TlsUtilities.ReadUint16(inStr);
if (!ArrayContains(offeredCipherSuites, selectedCipherSuite) ||
selectedCipherSuite == CipherSuite.TLS_EMPTY_RENEGOTIATION_INFO_SCSV)
{
this.FailWithError(AlertLevel.fatal, AlertDescription.illegal_parameter);
}
this.tlsClient.NotifySelectedCipherSuite(selectedCipherSuite);
/*
* Find out which CompressionMethod the server has chosen and check that
* it was one of the offered ones.
*/
CompressionMethod selectedCompressionMethod = (CompressionMethod)TlsUtilities.ReadUint8(inStr);
if (!ArrayContains(offeredCompressionMethods, selectedCompressionMethod))
{
this.FailWithError(AlertLevel.fatal, AlertDescription.illegal_parameter);
}
this.tlsClient.NotifySelectedCompressionMethod(selectedCompressionMethod);
/*
* RFC3546 2.2 The extended server hello message format MAY be
* sent in place of the server hello message when the client has
* requested extended functionality via the extended client hello
* message specified in Section 2.1.
* ...
* Note that the extended server hello message is only sent in response
* to an extended client hello message. This prevents the possibility
* that the extended server hello message could "break" existing TLS 1.0
* clients.
*/
/*
* TODO RFC 3546 2.3
* If [...] the older session is resumed, then the server MUST ignore
* extensions appearing in the client hello, and send a server hello
* containing no extensions.
*/
// ExtensionType -> byte[]
IDictionary serverExtensions = Platform.CreateHashtable();
if (inStr.Position < inStr.Length)
{
// Process extensions from extended server hello
byte[] extBytes = TlsUtilities.ReadOpaque16(inStr);
MemoryStream ext = new MemoryStream(extBytes, false);
while (ext.Position < ext.Length)
{
ExtensionType extType = (ExtensionType)TlsUtilities.ReadUint16(ext);
byte[] extValue = TlsUtilities.ReadOpaque16(ext);
// Note: RFC 5746 makes a special case for EXT_RenegotiationInfo
if (extType != ExtensionType.renegotiation_info &&
!clientExtensions.Contains(extType))
{
/*
* RFC 3546 2.3
* Note that for all extension types (including those defined in
* future), the extension type MUST NOT appear in the extended server
* hello unless the same extension type appeared in the corresponding
* client hello. Thus clients MUST abort the handshake if they receive
* an extension type in the extended server hello that they did not
* request in the associated (extended) client hello.
*/
this.FailWithError(AlertLevel.fatal, AlertDescription.unsupported_extension);
}
if (serverExtensions.Contains(extType))
{
/*
* RFC 3546 2.3
* Also note that when multiple extensions of different types are
* present in the extended client hello or the extended server hello,
* the extensions may appear in any order. There MUST NOT be more than
* one extension of the same type.
*/
this.FailWithError(AlertLevel.fatal, AlertDescription.illegal_parameter);
}
serverExtensions.Add(extType, extValue);
}
}
AssertEmpty(inStr);
/*
* RFC 5746 3.4. When a ServerHello is received, the client MUST check if it
* includes the "renegotiation_info" extension:
*/
{
bool secure_negotiation = serverExtensions.Contains(ExtensionType.renegotiation_info);
/*
* If the extension is present, set the secure_renegotiation flag
* to TRUE. The client MUST then verify that the length of the
* "renegotiated_connection" field is zero, and if it is not, MUST
* abort the handshake (by sending a fatal handshake_failure
* alert).
*/
if (secure_negotiation)
{
byte[] renegExtValue = (byte[])serverExtensions[ExtensionType.renegotiation_info];
if (!Arrays.ConstantTimeAreEqual(renegExtValue,
CreateRenegotiationInfo(emptybuf)))
{
this.FailWithError(AlertLevel.fatal, AlertDescription.handshake_failure);
}
}
tlsClient.NotifySecureRenegotiation(secure_negotiation);
}
if (clientExtensions != null)
{
tlsClient.ProcessServerExtensions(serverExtensions);
}
this.keyExchange = tlsClient.GetKeyExchange();
connection_state = CS_SERVER_HELLO_RECEIVED;
break;
default:
this.FailWithError(AlertLevel.fatal, AlertDescription.unexpected_message);
break;
}
break;
case HandshakeType.server_hello_done:
switch (connection_state)
{
case CS_SERVER_CERTIFICATE_RECEIVED:
case CS_SERVER_KEY_EXCHANGE_RECEIVED:
case CS_CERTIFICATE_REQUEST_RECEIVED:
// NB: Original code used case label fall-through
if (connection_state == CS_SERVER_CERTIFICATE_RECEIVED)
{
// There was no server key exchange message; check it's OK
this.keyExchange.SkipServerKeyExchange();
}
AssertEmpty(inStr);
connection_state = CS_SERVER_HELLO_DONE_RECEIVED;
TlsCredentials clientCreds = null;
if (certificateRequest == null)
{
this.keyExchange.SkipClientCredentials();
}
else
{
clientCreds = this.authentication.GetClientCredentials(certificateRequest);
Certificate clientCert;
if (clientCreds == null)
{
this.keyExchange.SkipClientCredentials();
clientCert = Certificate.EmptyChain;
}
else
{
this.keyExchange.ProcessClientCredentials(clientCreds);
clientCert = clientCreds.Certificate;
}
SendClientCertificate(clientCert);
}
/*
* Send the client key exchange message, depending on the key
* exchange we are using in our CipherSuite.
*/
SendClientKeyExchange();
connection_state = CS_CLIENT_KEY_EXCHANGE_SEND;
if (clientCreds != null && clientCreds is TlsSignerCredentials)
{
TlsSignerCredentials signerCreds = (TlsSignerCredentials)clientCreds;
byte[] md5andsha1 = rs.GetCurrentHash();
byte[] clientCertificateSignature = signerCreds.GenerateCertificateSignature(
md5andsha1);
SendCertificateVerify(clientCertificateSignature);
connection_state = CS_CERTIFICATE_VERIFY_SEND;
}
/*
* Now, we send change cipher state
*/
byte[] cmessage = new byte[1];
cmessage[0] = 1;
rs.WriteMessage(ContentType.change_cipher_spec, cmessage, 0, cmessage.Length);
connection_state = CS_CLIENT_CHANGE_CIPHER_SPEC_SEND;
/*
* Calculate the master_secret
*/
byte[] pms = this.keyExchange.GeneratePremasterSecret();
securityParameters.masterSecret = TlsUtilities.PRF(pms, "master secret",
TlsUtilities.Concat(securityParameters.clientRandom, securityParameters.serverRandom),
48);
// TODO Is there a way to ensure the data is really overwritten?
/*
* RFC 2246 8.1. The pre_master_secret should be deleted from
* memory once the master_secret has been computed.
*/
Array.Clear(pms, 0, pms.Length);
/*
* Initialize our cipher suite
*/
rs.ClientCipherSpecDecided(tlsClient.GetCompression(), tlsClient.GetCipher());
/*
* Send our finished message.
*/
byte[] clientVerifyData = TlsUtilities.PRF(securityParameters.masterSecret,
"client finished", rs.GetCurrentHash(), 12);
MemoryStream bos = new MemoryStream();
TlsUtilities.WriteUint8((byte)HandshakeType.finished, bos);
TlsUtilities.WriteOpaque24(clientVerifyData, bos);
byte[] message = bos.ToArray();
rs.WriteMessage(ContentType.handshake, message, 0, message.Length);
this.connection_state = CS_CLIENT_FINISHED_SEND;
break;
default:
this.FailWithError(AlertLevel.fatal, AlertDescription.handshake_failure);
break;
}
break;
case HandshakeType.server_key_exchange:
{
switch (connection_state)
{
case CS_SERVER_HELLO_RECEIVED:
case CS_SERVER_CERTIFICATE_RECEIVED:
{
// NB: Original code used case label fall-through
if (connection_state == CS_SERVER_HELLO_RECEIVED)
{
// There was no server certificate message; check it's OK
this.keyExchange.SkipServerCertificate();
this.authentication = null;
}
this.keyExchange.ProcessServerKeyExchange(inStr);
AssertEmpty(inStr);
break;
}
default:
this.FailWithError(AlertLevel.fatal, AlertDescription.unexpected_message);
break;
}
this.connection_state = CS_SERVER_KEY_EXCHANGE_RECEIVED;
break;
}
case HandshakeType.certificate_request:
switch (connection_state)
{
case CS_SERVER_CERTIFICATE_RECEIVED:
case CS_SERVER_KEY_EXCHANGE_RECEIVED:
{
// NB: Original code used case label fall-through
if (connection_state == CS_SERVER_CERTIFICATE_RECEIVED)
{
// There was no server key exchange message; check it's OK
this.keyExchange.SkipServerKeyExchange();
}
if (this.authentication == null)
{
/*
* RFC 2246 7.4.4. It is a fatal handshake_failure alert
* for an anonymous server to request client identification.
*/
this.FailWithError(AlertLevel.fatal, AlertDescription.handshake_failure);
}
int numTypes = TlsUtilities.ReadUint8(inStr);
ClientCertificateType[] certificateTypes = new ClientCertificateType[numTypes];
for (int i = 0; i < numTypes; ++i)
{
certificateTypes[i] = (ClientCertificateType)TlsUtilities.ReadUint8(inStr);
}
byte[] authorities = TlsUtilities.ReadOpaque16(inStr);
AssertEmpty(inStr);
IList authorityDNs = Platform.CreateArrayList();
MemoryStream bis = new MemoryStream(authorities, false);
while (bis.Position < bis.Length)
{
byte[] dnBytes = TlsUtilities.ReadOpaque16(bis);
// TODO Switch to X500Name when available
authorityDNs.Add(X509Name.GetInstance(Asn1Object.FromByteArray(dnBytes)));
}
this.certificateRequest = new CertificateRequest(certificateTypes,
authorityDNs);
this.keyExchange.ValidateCertificateRequest(this.certificateRequest);
break;
}
default:
this.FailWithError(AlertLevel.fatal, AlertDescription.unexpected_message);
break;
}
this.connection_state = CS_CERTIFICATE_REQUEST_RECEIVED;
break;
case HandshakeType.hello_request:
/*
* RFC 2246 7.4.1.1 Hello request
* This message will be ignored by the client if the client is currently
* negotiating a session. This message may be ignored by the client if it
* does not wish to renegotiate a session, or the client may, if it wishes,
* respond with a no_renegotiation alert.
*/
if (connection_state == CS_DONE)
{
// Renegotiation not supported yet
SendAlert(AlertLevel.warning, AlertDescription.no_renegotiation);
}
break;
case HandshakeType.client_key_exchange:
case HandshakeType.certificate_verify:
case HandshakeType.client_hello:
default:
// We do not support this!
this.FailWithError(AlertLevel.fatal, AlertDescription.unexpected_message);
break;
}
}
private void ProcessHandshakeMessage(short type, byte[] buf)
{
MemoryStream inStr = new MemoryStream(buf, false);
/*
* Check the type.
*/
switch (type)
{
case HP_CERTIFICATE:
{
switch (connection_state)
{
case CS_SERVER_HELLO_RECEIVED:
{
// Parse the Certificate message and send to cipher suite
Certificate serverCertificate = Certificate.Parse(inStr);
AssertEmpty(inStr);
this.keyExchange.ProcessServerCertificate(serverCertificate);
break;
}
default:
this.FailWithError(AL_fatal, AP_unexpected_message);
break;
}
connection_state = CS_SERVER_CERTIFICATE_RECEIVED;
break;
}
case HP_FINISHED:
switch (connection_state)
{
case CS_SERVER_CHANGE_CIPHER_SPEC_RECEIVED:
/*
* Read the checksum from the finished message, it has always 12 bytes.
*/
byte[] serverVerifyData = new byte[12];
TlsUtilities.ReadFully(serverVerifyData, inStr);
AssertEmpty(inStr);
/*
* Calculate our own checksum.
*/
byte[] expectedServerVerifyData = TlsUtilities.PRF(
securityParameters.masterSecret, "server finished",
rs.GetCurrentHash(), 12);
/*
* Compare both checksums.
*/
if (!Arrays.ConstantTimeAreEqual(expectedServerVerifyData, serverVerifyData))
{
/*
* Wrong checksum in the finished message.
*/
this.FailWithError(AL_fatal, AP_handshake_failure);
}
connection_state = CS_DONE;
/*
* We are now ready to receive application data.
*/
this.appDataReady = true;
break;
default:
this.FailWithError(AL_fatal, AP_unexpected_message);
break;
}
break;
case HP_SERVER_HELLO:
switch (connection_state)
{
case CS_CLIENT_HELLO_SEND:
/*
* Read the server hello message
*/
TlsUtilities.CheckVersion(inStr, this);
/*
* Read the server random
*/
securityParameters.serverRandom = new byte[32];
TlsUtilities.ReadFully(securityParameters.serverRandom, inStr);
/*
* Currently, we don't support session ids
*/
byte[] sessionID = TlsUtilities.ReadOpaque8(inStr);
if (sessionID.Length > 32)
{
this.FailWithError(TlsProtocolHandler.AL_fatal, TlsProtocolHandler.AP_illegal_parameter);
}
this.tlsClient.NotifySessionID(sessionID);
/*
* Find out which ciphersuite the server has chosen and check that
* it was one of the offered ones.
*/
int selectedCipherSuite = TlsUtilities.ReadUint16(inStr);
if (!WasCipherSuiteOffered(selectedCipherSuite))
{
this.FailWithError(TlsProtocolHandler.AL_fatal, TlsProtocolHandler.AP_illegal_parameter);
}
this.tlsClient.NotifySelectedCipherSuite(selectedCipherSuite);
/*
* We support only the null compression which means no
* compression.
*/
short compressionMethod = TlsUtilities.ReadUint8(inStr);
if (compressionMethod != 0)
{
this.FailWithError(TlsProtocolHandler.AL_fatal, TlsProtocolHandler.AP_illegal_parameter);
}
/*
* RFC4366 2.2 The extended server hello message format MAY be
* sent in place of the server hello message when the client has
* requested extended functionality via the extended client hello
* message specified in Section 2.1.
*/
if (extendedClientHello)
{
// Integer -> byte[]
Hashtable serverExtensions = new Hashtable();
if (inStr.Position < inStr.Length)
{
// Process extensions from extended server hello
byte[] extBytes = TlsUtilities.ReadOpaque16(inStr);
MemoryStream ext = new MemoryStream(extBytes, false);
while (ext.Position < ext.Length)
{
int extType = TlsUtilities.ReadUint16(ext);
byte[] extValue = TlsUtilities.ReadOpaque16(ext);
serverExtensions.Add(extType, extValue);
}
}
// TODO[RFC 5746] If renegotiation_info was sent in client hello, check here
tlsClient.ProcessServerExtensions(serverExtensions);
}
AssertEmpty(inStr);
this.keyExchange = tlsClient.CreateKeyExchange();
connection_state = CS_SERVER_HELLO_RECEIVED;
break;
default:
this.FailWithError(AL_fatal, AP_unexpected_message);
break;
}
break;
case HP_SERVER_HELLO_DONE:
switch (connection_state)
{
case CS_SERVER_CERTIFICATE_RECEIVED:
case CS_SERVER_KEY_EXCHANGE_RECEIVED:
case CS_CERTIFICATE_REQUEST_RECEIVED:
// NB: Original code used case label fall-through
if (connection_state == CS_SERVER_CERTIFICATE_RECEIVED)
{
// There was no server key exchange message; check it's OK
this.keyExchange.SkipServerKeyExchange();
}
AssertEmpty(inStr);
bool isClientCertificateRequested = (connection_state == CS_CERTIFICATE_REQUEST_RECEIVED);
connection_state = CS_SERVER_HELLO_DONE_RECEIVED;
if (isClientCertificateRequested)
{
SendClientCertificate(tlsClient.GetCertificate());
}
/*
* Send the client key exchange message, depending on the key
* exchange we are using in our ciphersuite.
*/
SendClientKeyExchange(this.keyExchange.GenerateClientKeyExchange());
connection_state = CS_CLIENT_KEY_EXCHANGE_SEND;
if (isClientCertificateRequested)
{
byte[] clientCertificateSignature = tlsClient.GenerateCertificateSignature(rs.GetCurrentHash());
if (clientCertificateSignature != null)
{
SendCertificateVerify(clientCertificateSignature);
connection_state = CS_CERTIFICATE_VERIFY_SEND;
}
}
/*
* Now, we send change cipher state
*/
byte[] cmessage = new byte[1];
cmessage[0] = 1;
rs.WriteMessage(RL_CHANGE_CIPHER_SPEC, cmessage, 0, cmessage.Length);
connection_state = CS_CLIENT_CHANGE_CIPHER_SPEC_SEND;
/*
* Calculate the master_secret
*/
byte[] pms = this.keyExchange.GeneratePremasterSecret();
securityParameters.masterSecret = TlsUtilities.PRF(pms, "master secret",
TlsUtilities.Concat(securityParameters.clientRandom, securityParameters.serverRandom),
48);
// TODO Is there a way to ensure the data is really overwritten?
/*
* RFC 2246 8.1. "The pre_master_secret should be deleted from
* memory once the master_secret has been computed."
*/
Array.Clear(pms, 0, pms.Length);
/*
* Initialize our cipher suite
*/
rs.ClientCipherSpecDecided(tlsClient.CreateCipher(securityParameters));
/*
* Send our finished message.
*/
byte[] clientVerifyData = TlsUtilities.PRF(securityParameters.masterSecret,
"client finished", rs.GetCurrentHash(), 12);
MemoryStream bos = new MemoryStream();
TlsUtilities.WriteUint8(HP_FINISHED, bos);
TlsUtilities.WriteOpaque24(clientVerifyData, bos);
byte[] message = bos.ToArray();
rs.WriteMessage(RL_HANDSHAKE, message, 0, message.Length);
this.connection_state = CS_CLIENT_FINISHED_SEND;
break;
default:
this.FailWithError(AL_fatal, AP_handshake_failure);
break;
}
break;
case HP_SERVER_KEY_EXCHANGE:
{
switch (connection_state)
{
case CS_SERVER_HELLO_RECEIVED:
case CS_SERVER_CERTIFICATE_RECEIVED:
{
// NB: Original code used case label fall-through
if (connection_state == CS_SERVER_HELLO_RECEIVED)
{
// There was no server certificate message; check it's OK
this.keyExchange.SkipServerCertificate();
}
this.keyExchange.ProcessServerKeyExchange(inStr, securityParameters);
AssertEmpty(inStr);
break;
}
default:
this.FailWithError(AL_fatal, AP_unexpected_message);
break;
}
this.connection_state = CS_SERVER_KEY_EXCHANGE_RECEIVED;
break;
}
case HP_CERTIFICATE_REQUEST:
switch (connection_state)
{
case CS_SERVER_CERTIFICATE_RECEIVED:
case CS_SERVER_KEY_EXCHANGE_RECEIVED:
{
// NB: Original code used case label fall-through
if (connection_state == CS_SERVER_CERTIFICATE_RECEIVED)
{
// There was no server key exchange message; check it's OK
this.keyExchange.SkipServerKeyExchange();
}
byte[] types = TlsUtilities.ReadOpaque8(inStr);
byte[] authorities = TlsUtilities.ReadOpaque16(inStr);
AssertEmpty(inStr);
ArrayList authorityDNs = new ArrayList();
MemoryStream bis = new MemoryStream(authorities, false);
while (bis.Position < bis.Length)
{
byte[] dnBytes = TlsUtilities.ReadOpaque16(bis);
authorityDNs.Add(X509Name.GetInstance(Asn1Object.FromByteArray(dnBytes)));
}
this.tlsClient.ProcessServerCertificateRequest(types, authorityDNs);
break;
}
default:
this.FailWithError(AL_fatal, AP_unexpected_message);
break;
}
this.connection_state = CS_CERTIFICATE_REQUEST_RECEIVED;
break;
case HP_HELLO_REQUEST:
/*
* RFC 2246 7.4.1.1 Hello request
* "This message will be ignored by the client if the client is currently
* negotiating a session. This message may be ignored by the client if it
* does not wish to renegotiate a session, or the client may, if it wishes,
* respond with a no_renegotiation alert."
*/
if (connection_state == CS_DONE)
{
// Renegotiation not supported yet
SendAlert(AL_warning, AP_no_renegotiation);
}
break;
case HP_CLIENT_KEY_EXCHANGE:
case HP_CERTIFICATE_VERIFY:
case HP_CLIENT_HELLO:
default:
// We do not support this!
this.FailWithError(AL_fatal, AP_unexpected_message);
break;
}
}
private void processHandshake()
{
bool read;
do
{
read = false;
/*
* We need the first 4 bytes, they contain type and length of
* the message.
*/
if (handshakeQueue.Available >= 4)
{
byte[] beginning = new byte[4];
handshakeQueue.Read(beginning, 0, 4, 0);
MemoryStream bis = new MemoryStream(beginning, false);
short type = TlsUtilities.ReadUint8(bis);
int len = TlsUtilities.ReadUint24(bis);
/*
* Check if we have enough bytes in the buffer to read
* the full message.
*/
if (handshakeQueue.Available >= (len + 4))
{
/*
* Read the message.
*/
byte[] buf = new byte[len];
handshakeQueue.Read(buf, 0, len, 4);
handshakeQueue.RemoveData(len + 4);
/*
* If it is not a finished message, update our hashes
* we prepare for the finish message.
*/
if (type != HP_FINISHED)
{
rs.hash1.BlockUpdate(beginning, 0, 4);
rs.hash2.BlockUpdate(beginning, 0, 4);
rs.hash1.BlockUpdate(buf, 0, len);
rs.hash2.BlockUpdate(buf, 0, len);
}
/*
* Now, parse the message.
*/
MemoryStream inStr = new MemoryStream(buf, false);
/*
* Check the type.
*/
switch (type)
{
case HP_CERTIFICATE:
switch (connection_state)
{
case CS_SERVER_HELLO_RECEIVED:
/*
* Parse the certificates.
*/
Certificate cert = Certificate.Parse(inStr);
AssertEmpty(inStr);
/*
* Verify them.
*/
if (!this.verifyer.IsValid(cert.GetCerts()))
{
this.FailWithError(AL_fatal, AP_user_canceled);
}
/*
* We only support RSA certificates. Lets hope
* this is one.
*/
RsaPublicKeyStructure rsaKey = null;
try
{
rsaKey = RsaPublicKeyStructure.GetInstance(
cert.certs[0].TbsCertificate.SubjectPublicKeyInfo.GetPublicKey());
}
catch (Exception)
{
/*
* Sorry, we have to fail ;-(
*/
this.FailWithError(AL_fatal, AP_unsupported_certificate);
}
/*
* Parse the servers public RSA key.
*/
this.serverRsaKey = new RsaKeyParameters(
false,
rsaKey.Modulus,
rsaKey.PublicExponent);
connection_state = CS_SERVER_CERTIFICATE_RECEIVED;
read = true;
break;
default:
this.FailWithError(AL_fatal, AP_unexpected_message);
break;
}
break;
case HP_FINISHED:
switch (connection_state)
{
case CS_SERVER_CHANGE_CIPHER_SPEC_RECEIVED:
/*
* Read the checksum from the finished message,
* it has always 12 bytes.
*/
byte[] receivedChecksum = new byte[12];
TlsUtilities.ReadFully(receivedChecksum, inStr);
AssertEmpty(inStr);
/*
* Calculate our owne checksum.
*/
byte[] checksum = new byte[12];
byte[] md5andsha1 = new byte[16 + 20];
rs.hash2.DoFinal(md5andsha1, 0);
TlsUtilities.PRF(this.ms, TlsUtilities.ToByteArray("server finished"), md5andsha1, checksum);
/*
* Compare both checksums.
*/
for (int i = 0; i < receivedChecksum.Length; i++)
{
if (receivedChecksum[i] != checksum[i])
{
/*
* Wrong checksum in the finished message.
*/
this.FailWithError(AL_fatal, AP_handshake_failure);
}
}
connection_state = CS_DONE;
/*
* We are now ready to receive application data.
*/
this.appDataReady = true;
read = true;
break;
default:
this.FailWithError(AL_fatal, AP_unexpected_message);
break;
}
break;
case HP_SERVER_HELLO:
switch (connection_state)
{
case CS_CLIENT_HELLO_SEND:
/*
* Read the server hello message
*/
TlsUtilities.CheckVersion(inStr, this);
/*
* Read the server random
*/
this.serverRandom = new byte[32];
TlsUtilities.ReadFully(this.serverRandom, inStr);
/*
* Currenty, we don't support session ids
*/
short sessionIdLength = TlsUtilities.ReadUint8(inStr);
byte[] sessionId = new byte[sessionIdLength];
TlsUtilities.ReadFully(sessionId, inStr);
/*
* Find out which ciphersuite the server has
* choosen. If we don't support this ciphersuite,
* the TlsCipherSuiteManager will throw an
* exception.
*/
this.choosenCipherSuite = TlsCipherSuiteManager.GetCipherSuite(
TlsUtilities.ReadUint16(inStr), this);
/*
* We support only the null compression which
* means no compression.
*/
short compressionMethod = TlsUtilities.ReadUint8(inStr);
if (compressionMethod != 0)
{
this.FailWithError(TlsProtocolHandler.AL_fatal, TlsProtocolHandler.AP_illegal_parameter);
}
AssertEmpty(inStr);
connection_state = CS_SERVER_HELLO_RECEIVED;
read = true;
break;
default:
this.FailWithError(AL_fatal, AP_unexpected_message);
break;
}
break;
case HP_SERVER_HELLO_DONE:
switch (connection_state)
{
case CS_SERVER_CERTIFICATE_RECEIVED:
case CS_SERVER_KEY_EXCHANGE_RECEIVED:
// NB: Original code used case label fall-through
if (connection_state == CS_SERVER_CERTIFICATE_RECEIVED)
{
/*
* There was no server key exchange message, check
* that we are doing RSA key exchange.
*/
if (this.choosenCipherSuite.KeyExchangeAlgorithm != TlsCipherSuite.KE_RSA)
{
this.FailWithError(AL_fatal, AP_unexpected_message);
}
}
AssertEmpty(inStr);
connection_state = CS_SERVER_HELLO_DONE_RECEIVED;
/*
* Send the client key exchange message, depending
* on the key exchange we are using in our
* ciphersuite.
*/
short ke = this.choosenCipherSuite.KeyExchangeAlgorithm;
switch (ke)
{
case TlsCipherSuite.KE_RSA:
/*
* We are doing RSA key exchange. We will
* choose a pre master secret and send it
* rsa encrypted to the server.
*
* Prepare pre master secret.
*/
pms = new byte[48];
pms[0] = 3;
pms[1] = 1;
random.NextBytes(pms, 2, 46);
/*
* Encode the pms and send it to the server.
*
* Prepare an Pkcs1Encoding with good random
* padding.
*/
RsaBlindedEngine rsa = new RsaBlindedEngine();
Pkcs1Encoding encoding = new Pkcs1Encoding(rsa);
encoding.Init(true, new ParametersWithRandom(this.serverRsaKey, this.random));
byte[] encrypted = null;
try
{
encrypted = encoding.ProcessBlock(pms, 0, pms.Length);
}
catch (InvalidCipherTextException)
{
/*
* This should never happen, only during decryption.
*/
this.FailWithError(AL_fatal, AP_internal_error);
}
/*
* Send the encrypted pms.
*/
MemoryStream bos = new MemoryStream();
TlsUtilities.WriteUint8(HP_CLIENT_KEY_EXCHANGE, bos);
TlsUtilities.WriteUint24(encrypted.Length + 2, bos);
TlsUtilities.WriteUint16(encrypted.Length, bos);
bos.Write(encrypted, 0, encrypted.Length);
byte[] message = bos.ToArray();
rs.WriteMessage((short)RL_HANDSHAKE, message, 0, message.Length);
break;
case TlsCipherSuite.KE_DHE_RSA:
/*
* Send the Client Key Exchange message for
* DHE key exchange.
*/
byte[] YcByte = this.Yc.ToByteArray();
MemoryStream DHbos = new MemoryStream();
TlsUtilities.WriteUint8(HP_CLIENT_KEY_EXCHANGE, DHbos);
TlsUtilities.WriteUint24(YcByte.Length + 2, DHbos);
TlsUtilities.WriteUint16(YcByte.Length, DHbos);
DHbos.Write(YcByte, 0, YcByte.Length);
byte[] DHmessage = DHbos.ToArray();
rs.WriteMessage((short)RL_HANDSHAKE, DHmessage, 0, DHmessage.Length);
break;
default:
/*
* Proble during handshake, we don't know
* how to thandle this key exchange method.
*/
this.FailWithError(AL_fatal, AP_unexpected_message);
break;
}
connection_state = CS_CLIENT_KEY_EXCHANGE_SEND;
/*
* Now, we send change cipher state
*/
byte[] cmessage = new byte[1];
cmessage[0] = 1;
rs.WriteMessage((short)RL_CHANGE_CIPHER_SPEC, cmessage, 0, cmessage.Length);
connection_state = CS_CLIENT_CHANGE_CIPHER_SPEC_SEND;
/*
* Calculate the ms
*/
this.ms = new byte[48];
byte[] randBytes = new byte[clientRandom.Length + serverRandom.Length];
Array.Copy(clientRandom, 0, randBytes, 0, clientRandom.Length);
Array.Copy(serverRandom, 0, randBytes, clientRandom.Length, serverRandom.Length);
TlsUtilities.PRF(pms, TlsUtilities.ToByteArray("master secret"), randBytes, this.ms);
/*
* Initialize our cipher suite
*/
rs.writeSuite = this.choosenCipherSuite;
rs.writeSuite.Init(this.ms, clientRandom, serverRandom);
/*
* Send our finished message.
*/
byte[] checksum = new byte[12];
byte[] md5andsha1 = new byte[16 + 20];
rs.hash1.DoFinal(md5andsha1, 0);
TlsUtilities.PRF(this.ms, TlsUtilities.ToByteArray("client finished"), md5andsha1, checksum);
MemoryStream bos2 = new MemoryStream();
TlsUtilities.WriteUint8(HP_FINISHED, bos2);
TlsUtilities.WriteUint24(12, bos2);
bos2.Write(checksum, 0, checksum.Length);
byte[] message2 = bos2.ToArray();
rs.WriteMessage((short)RL_HANDSHAKE, message2, 0, message2.Length);
this.connection_state = CS_CLIENT_FINISHED_SEND;
read = true;
break;
default:
this.FailWithError(AL_fatal, AP_handshake_failure);
break;
}
break;
case HP_SERVER_KEY_EXCHANGE:
switch (connection_state)
{
case CS_SERVER_CERTIFICATE_RECEIVED:
/*
* Check that we are doing DHE key exchange
*/
if (this.choosenCipherSuite.KeyExchangeAlgorithm != TlsCipherSuite.KE_DHE_RSA)
{
this.FailWithError(AL_fatal, AP_unexpected_message);
}
/*
* Parse the Structure
*/
int pLength = TlsUtilities.ReadUint16(inStr);
byte[] pByte = new byte[pLength];
TlsUtilities.ReadFully(pByte, inStr);
int gLength = TlsUtilities.ReadUint16(inStr);
byte[] gByte = new byte[gLength];
TlsUtilities.ReadFully(gByte, inStr);
int YsLength = TlsUtilities.ReadUint16(inStr);
byte[] YsByte = new byte[YsLength];
TlsUtilities.ReadFully(YsByte, inStr);
int sigLength = TlsUtilities.ReadUint16(inStr);
byte[] sigByte = new byte[sigLength];
TlsUtilities.ReadFully(sigByte, inStr);
this.AssertEmpty(inStr);
/*
* Verify the Signature.
*
* First, calculate the hash.
*/
CombinedHash sigDigest = new CombinedHash();
MemoryStream signedData = new MemoryStream();
TlsUtilities.WriteUint16(pLength, signedData);
signedData.Write(pByte, 0, pByte.Length);
TlsUtilities.WriteUint16(gLength, signedData);
signedData.Write(gByte, 0, gByte.Length);
TlsUtilities.WriteUint16(YsLength, signedData);
signedData.Write(YsByte, 0, YsByte.Length);
byte[] signed = signedData.ToArray();
sigDigest.BlockUpdate(this.clientRandom, 0, this.clientRandom.Length);
sigDigest.BlockUpdate(this.serverRandom, 0, this.serverRandom.Length);
sigDigest.BlockUpdate(signed, 0, signed.Length);
byte[] hash = new byte[sigDigest.GetDigestSize()];
sigDigest.DoFinal(hash, 0);
/*
* Now, do the RSA operation
*/
RsaBlindedEngine rsa = new RsaBlindedEngine();
Pkcs1Encoding encoding = new Pkcs1Encoding(rsa);
encoding.Init(false, this.serverRsaKey);
/*
* The data which was signed
*/
byte[] sigHash = null;
try
{
sigHash = encoding.ProcessBlock(sigByte, 0, sigByte.Length);
}
catch (InvalidCipherTextException)
{
this.FailWithError(AL_fatal, AP_bad_certificate);
}
/*
* Check if the data which was signed is equal to
* the hash we calculated.
*/
if (sigHash.Length != hash.Length)
{
this.FailWithError(AL_fatal, AP_bad_certificate);
}
for (int i = 0; i < sigHash.Length; i++)
{
if (sigHash[i] != hash[i])
{
this.FailWithError(AL_fatal, AP_bad_certificate);
}
}
/*
* OK, Signature was correct.
*
* Do the DH calculation.
*/
BigInteger p = new BigInteger(1, pByte);
BigInteger g = new BigInteger(1, gByte);
BigInteger Ys = new BigInteger(1, YsByte);
BigInteger x = new BigInteger(p.BitLength - 1, this.random);
Yc = g.ModPow(x, p);
this.pms = (Ys.ModPow(x, p)).ToByteArray();
/*
* Remove leading zero byte, if present.
*/
if (this.pms[0] == 0)
{
byte[] tmp = new byte[this.pms.Length - 1];
Array.Copy(this.pms, 1, tmp, 0, tmp.Length);
this.pms = tmp;
}
this.connection_state = CS_SERVER_KEY_EXCHANGE_RECEIVED;
read = true;
break;
default:
this.FailWithError(AL_fatal, AP_unexpected_message);
break;
}
break;
case HP_HELLO_REQUEST:
case HP_CLIENT_KEY_EXCHANGE:
case HP_CERTIFICATE_REQUEST:
case HP_CERTIFICATE_VERIFY:
case HP_CLIENT_HELLO:
default:
// We do not support this!
this.FailWithError(AL_fatal, AP_unexpected_message);
break;
}
}
}
}while (read);
}