private void handleCredSSP(ByteBuffer buf, Link link) {
if (verbose) System.out.println("[" + this + "] INFO: CredSSP data received: " + buf + ".");
// Store header position: will parse whole header later in BER format parser
int headerPosition = buf.cursor - 1;
long payloadLength = buf.readBerLength();
if (payloadLength > 10 * 1024)
throw new RuntimeException(
"["
+ this
+ "] ERROR: CredSSP packets seems to be too long: "
+ payloadLength
+ "bytes. Data: "
+ buf
+ ".");
// Length is the size of payload, so we need to append size of header
int headerLength = buf.cursor - headerPosition;
int packetLength = (int) payloadLength + headerLength;
if (!cap(buf, packetLength, packetLength, link, false))
// Wait for full packet to arrive
return;
// Extract payload (with header)
ByteBuffer outBuf = buf.slice(headerPosition, packetLength, true);
buf.unref();
if (verbose) {
outBuf.putMetadata("source", this);
}
pushDataToPad(CREDSSP_PAD, outBuf);
}
private void responseToChallenge(ByteBuffer buf, Link link) {
// Challenge is exactly 16 bytes long
if (!cap(buf, 16, 16, link, true)) return;
ByteBuffer challenge = buf.slice(buf.cursor, 16, true);
buf.unref();
// Encode challenge with password
ByteBuffer response;
try {
response = encodePassword(challenge, password);
challenge.unref();
} catch (Exception e) {
throw new RuntimeException(
"Cannot encrypt client password to send to server: " + e.getMessage());
}
if (verbose) {
response.putMetadata("sender", this);
}
// Send encoded challenge
nextStage();
pushDataToOTOut(response);
}
private void handleTpkt(ByteBuffer buf, Link link) {
// Reserved
buf.skipBytes(1);
// Read TPKT length
int length = buf.readUnsignedShort();
if (!cap(buf, length, length, link, false))
// Wait for full packet to arrive
return;
int payloadLength = length - buf.cursor;
// Extract payload
ByteBuffer outBuf = buf.slice(buf.cursor, payloadLength, true);
buf.unref();
if (verbose) {
outBuf.putMetadata("source", this);
}
pushDataToPad(TPKT_PAD, outBuf);
}
