/**
* Creates a new SshMsgKexInit object.
*
* @param props
*/
public SshMsgKexInit(SshConnectionProperties props) {
super(SSH_MSG_KEX_INIT);
// Create some random data
cookie = new byte[16];
// Seed the random number generator
Random r = ConfigurationLoader.getRND();
// Get the next random bytes into our cookie
r.nextBytes(cookie);
// Get the supported algorithms from the factory objects but adding the
// preffered algorithm to the top of the list
supportedKex =
sortAlgorithmList(SshKeyExchangeFactory.getSupportedKeyExchanges(), props.getPrefKex());
supportedPK = sortAlgorithmList(SshKeyPairFactory.getSupportedKeys(), props.getPrefPublicKey());
supportedEncryptCS =
sortAlgorithmList(SshCipherFactory.getSupportedCiphers(), props.getPrefCSEncryption());
supportedEncryptSC =
sortAlgorithmList(SshCipherFactory.getSupportedCiphers(), props.getPrefSCEncryption());
supportedMacCS = sortAlgorithmList(SshHmacFactory.getSupportedMacs(), props.getPrefCSMac());
supportedMacSC = sortAlgorithmList(SshHmacFactory.getSupportedMacs(), props.getPrefSCMac());
supportedCompCS =
sortAlgorithmList(SshCompressionFactory.getSupportedCompression(), props.getPrefCSComp());
supportedCompSC =
sortAlgorithmList(SshCompressionFactory.getSupportedCompression(), props.getPrefSCComp());
// We currently don't support language preferences
supportedLangCS = new ArrayList();
supportedLangSC = new ArrayList();
// We don't guess (I don't see the point of this in the protocol!)
firstKexFollows = false;
}
/**
* @param msg
* @param sender
* @throws IOException
* @throws TransportProtocolException
*/
public synchronized void sendMessage(SshMessage msg, Object sender) throws IOException {
// Send a message, if were in key exchange then add it to
// the list unless of course it is a transport protocol or key
// exchange message
if (log.isDebugEnabled()) {
log.info("Sending " + msg.getMessageName());
}
int currentState = state.getValue();
if (sender instanceof SshKeyExchange
|| sender instanceof TransportProtocolCommon
|| (currentState == TransportProtocolState.CONNECTED)) {
sshOut.sendMessage(msg);
if (currentState == TransportProtocolState.CONNECTED) {
if (sendIgnore) {
byte[] count = new byte[1];
ConfigurationLoader.getRND().nextBytes(count);
byte[] rand = new byte[(count[0] & 0xFF) + 1];
ConfigurationLoader.getRND().nextBytes(rand);
SshMsgIgnore ignore = new SshMsgIgnore(new String(rand));
if (log.isDebugEnabled()) {
log.debug("Sending " + ignore.getMessageName());
}
sshOut.sendMessage(ignore);
}
}
} else if (currentState == TransportProtocolState.PERFORMING_KEYEXCHANGE) {
log.debug("Adding to message queue whilst in key exchange");
synchronized (messageStack) {
// Add this message to the end of the list
messageStack.add(msg);
}
} else {
throw new TransportProtocolException("The transport protocol is disconnected");
}
}
