public void processBufferData(Buffer buffer) {
CompositeDataPacket cdp = new CompositeDataPacket();
cdp.setPrimaryStream(buffer.getData());
if (buffer instanceof CompositeDataBuffer) {
CompositeDataBuffer cb = (CompositeDataBuffer) buffer;
cdp.setSecondaryStreams(cb.getBufferCompositeData());
}
buffer.reset();
count++;
if (count % 100 == 0) System.out.println(name + ": processed " + count + " buffers");
}
@Override
protected void append(LoggingEvent event) {
try {
buf.reset();
writeHeader(event);
writeSP();
writeStructuredData();
writeSP();
if (prefixMessageWithBOM) writeBOM();
writeString(event.getRenderedMessage());
protocol.send(this);
} catch (IOException e) {
errorHandler.error(
"Failed to emit message by " + protocol + " connection to " + host + ":" + port,
e,
ErrorCode.WRITE_FAILURE,
event);
}
}
/** Resets the data that the buffer reads. */
public void reset(byte[] input, int start, int length) {
buffer.reset(input, start, length);
}
public boolean next(Buffer _buf) throws Exception {
int i, j;
switch (state) {
case SSH_MSG_KEX_DH_GEX_GROUP:
// byte SSH_MSG_KEX_DH_GEX_GROUP(31)
// mpint p, safe prime
// mpint g, generator for subgroup in GF (p)
_buf.getInt();
_buf.getByte();
j = _buf.getByte();
if (j != SSH_MSG_KEX_DH_GEX_GROUP) {
System.err.println("type: must be SSH_MSG_KEX_DH_GEX_GROUP " + j);
return false;
}
p = _buf.getMPInt();
g = _buf.getMPInt();
dh.setP(p);
dh.setG(g);
// The client responds with:
// byte SSH_MSG_KEX_DH_GEX_INIT(32)
// mpint e <- g^x mod p
// x is a random number (1 < x < (p-1)/2)
e = dh.getE();
packet.reset();
buf.putByte((byte) SSH_MSG_KEX_DH_GEX_INIT);
buf.putMPInt(e);
session.write(packet);
if (JSch.getLogger().isEnabled(Logger.INFO)) {
JSch.getLogger().log(Logger.INFO, "SSH_MSG_KEX_DH_GEX_INIT sent");
JSch.getLogger().log(Logger.INFO, "expecting SSH_MSG_KEX_DH_GEX_REPLY");
}
state = SSH_MSG_KEX_DH_GEX_REPLY;
return true;
// break;
case SSH_MSG_KEX_DH_GEX_REPLY:
// The server responds with:
// byte SSH_MSG_KEX_DH_GEX_REPLY(33)
// string server public host key and certificates (K_S)
// mpint f
// string signature of H
j = _buf.getInt();
j = _buf.getByte();
j = _buf.getByte();
if (j != SSH_MSG_KEX_DH_GEX_REPLY) {
System.err.println("type: must be SSH_MSG_KEX_DH_GEX_REPLY " + j);
return false;
}
K_S = _buf.getString();
byte[] f = _buf.getMPInt();
byte[] sig_of_H = _buf.getString();
dh.setF(f);
dh.checkRange();
K = normalize(dh.getK());
// The hash H is computed as the HASH hash of the concatenation of the
// following:
// string V_C, the client's version string (CR and NL excluded)
// string V_S, the server's version string (CR and NL excluded)
// string I_C, the payload of the client's SSH_MSG_KEXINIT
// string I_S, the payload of the server's SSH_MSG_KEXINIT
// string K_S, the host key
// uint32 min, minimal size in bits of an acceptable group
// uint32 n, preferred size in bits of the group the server should send
// uint32 max, maximal size in bits of an acceptable group
// mpint p, safe prime
// mpint g, generator for subgroup
// mpint e, exchange value sent by the client
// mpint f, exchange value sent by the server
// mpint K, the shared secret
// This value is called the exchange hash, and it is used to authenti-
// cate the key exchange.
buf.reset();
buf.putString(V_C);
buf.putString(V_S);
buf.putString(I_C);
buf.putString(I_S);
buf.putString(K_S);
buf.putInt(min);
buf.putInt(preferred);
buf.putInt(max);
buf.putMPInt(p);
buf.putMPInt(g);
buf.putMPInt(e);
buf.putMPInt(f);
buf.putMPInt(K);
byte[] foo = new byte[buf.getLength()];
buf.getByte(foo);
sha.update(foo, 0, foo.length);
H = sha.digest();
// System.err.print("H -> "); dump(H, 0, H.length);
i = 0;
j = 0;
j =
((K_S[i++] << 24) & 0xff000000)
| ((K_S[i++] << 16) & 0x00ff0000)
| ((K_S[i++] << 8) & 0x0000ff00)
| ((K_S[i++]) & 0x000000ff);
String alg = Util.byte2str(K_S, i, j);
i += j;
boolean result = verify(alg, K_S, i, sig_of_H);
state = STATE_END;
return result;
}
return false;
}
/**
* called when the current net_message is from remote_address modifies net_message so that it
* points to the packet payload =================
*/
public static boolean Process(NetworkChannel chan, Buffer msg) {
int sequence, sequence_ack;
int reliable_ack, reliable_message;
int qport;
// get sequence numbers
msg.reset();
sequence = msg.getInt();
sequence_ack = msg.getInt();
// read the qport if we are a server
if (chan.sock == Constants.NS_SERVER) qport = msg.getShort();
// achtung unsigned int
reliable_message = sequence >>> 31;
reliable_ack = sequence_ack >>> 31;
sequence &= ~(1 << 31);
sequence_ack &= ~(1 << 31);
if (showpackets.value != 0) {
if (reliable_message != 0)
Com.Printf(
// "recv %4i : s=%i reliable=%i ack=%i rack=%i\n"
"recv "
+ msg.cursize
+ " : s="
+ sequence
+ " reliable="
+ (chan.incoming_reliable_sequence ^ 1)
+ " ack="
+ sequence_ack
+ " rack="
+ reliable_ack
+ "\n");
else
Com.Printf(
// "recv %4i : s=%i ack=%i rack=%i\n"
"recv "
+ msg.cursize
+ " : s="
+ sequence
+ " ack="
+ sequence_ack
+ " rack="
+ reliable_ack
+ "\n");
}
//
// discard stale or duplicated packets
//
if (sequence <= chan.incoming_sequence) {
if (showdrop.value != 0)
Com.Printf(
NET.AdrToString(chan.remote_address)
+ ":Out of order packet "
+ sequence
+ " at "
+ chan.incoming_sequence
+ "\n");
return false;
}
//
// dropped packets don't keep the message from being used
//
chan.dropped = sequence - (chan.incoming_sequence + 1);
if (chan.dropped > 0) {
if (showdrop.value != 0)
Com.Printf(
NET.AdrToString(chan.remote_address)
+ ":Dropped "
+ chan.dropped
+ " packets at "
+ sequence
+ "\n");
}
//
// if the current outgoing reliable message has been acknowledged
// clear the buffer to make way for the next
//
if (reliable_ack == chan.reliable_sequence) chan.reliable_length = 0; // it has been received
//
// if this message contains a reliable message, bump
// incoming_reliable_sequence
//
chan.incoming_sequence = sequence;
chan.incoming_acknowledged = sequence_ack;
chan.incoming_reliable_acknowledged = reliable_ack;
if (reliable_message != 0) {
chan.incoming_reliable_sequence ^= 1;
}
//
// the message can now be read from the current message pointer
//
chan.last_received = (int) Globals.curtime;
return true;
}
public void reset(ByteBuffer... input) {
buffers.reset(input);
}