/*
* On input, we hash messages one at a time since servers may need
* to access an intermediate hash to validate a CertificateVerify
* message.
*
* Note that many handshake messages can come in one record (and often
* do, to reduce network resource utilization), and one message can also
* require multiple records (e.g. very large Certificate messages).
*/
void processLoop() throws IOException {
// need to read off 4 bytes at least to get the handshake
// message type and length.
while (input.available() >= 4) {
byte messageType;
int messageLen;
/*
* See if we can read the handshake message header, and
* then the entire handshake message. If not, wait till
* we can read and process an entire message.
*/
input.mark(4);
messageType = (byte) input.getInt8();
messageLen = input.getInt24();
if (input.available() < messageLen) {
input.reset();
return;
}
/*
* Process the messsage. We require
* that processMessage() consumes the entire message. In
* lieu of explicit error checks (how?!) we assume that the
* data will look like garbage on encoding/processing errors,
* and that other protocol code will detect such errors.
*
* Note that digesting is normally deferred till after the
* message has been processed, though to process at least the
* client's Finished message (i.e. send the server's) we need
* to acccelerate that digesting.
*
* Also, note that hello request messages are never hashed;
* that includes the hello request header, too.
*/
if (messageType == HandshakeMessage.ht_hello_request) {
input.reset();
processMessage(messageType, messageLen);
input.ignore(4 + messageLen);
} else {
input.mark(messageLen);
processMessage(messageType, messageLen);
input.digestNow();
}
}
}
/*
* This routine is fed SSL handshake records when they become available,
* and processes messages found therein.
*/
void process_record(InputRecord r, boolean expectingFinished) throws IOException {
checkThrown();
/*
* Store the incoming handshake data, then see if we can
* now process any completed handshake messages
*/
input.incomingRecord(r);
/*
* We don't need to create a separate delegatable task
* for finished messages.
*/
if ((conn != null) || expectingFinished) {
processLoop();
} else {
delegateTask(
new PrivilegedExceptionAction<Void>() {
public Void run() throws Exception {
processLoop();
return null;
}
});
}
}
