org.red5.server.net.rtmp
Class RTMPHandshake

java.lang.Object
  org.red5.server.net.rtmp.RTMPHandshake

All Implemented Interfaces:

IHandshake

public class RTMPHandshake
extends Object
implements IHandshake

Generates and validates the RTMP handshake response for Flash Players. Client versions equal to or greater than Flash 9,0,124,0 require a nonzero value as the fifth byte of the handshake request.

Author:

Jacinto Shy II (jacinto.m.shy@ieee.org), Steven Zimmer (stevenlzimmer@gmail.com), Gavriloaie Eugen-Andrei, Ari-Pekka Viitanen, Paul Gregoire, Tiago Jacobs

Field Summary

protected static BigInteger	DH_BASE
protected static BigInteger	DH_MODULUS
protected static byte[]	DH_MODULUS_BYTES Modulus bytes from flazr
protected static byte[]	GENUINE_FMS_KEY
protected static byte[]	GENUINE_FP_KEY
static byte[]	HANDSHAKE_PAD_BYTES
protected byte[]	handshakeBytes
protected KeyAgreement	keyAgreement
protected static org.slf4j.Logger	log
protected static Random	random
protected int	validationScheme

Constructor Summary

RTMPHandshake()

Method Summary

byte[]	calculateHMAC_SHA256(byte[] input, byte[] key) Calculates an HMAC SHA256 hash using a default key length.
byte[]	calculateHMAC_SHA256(byte[] input, byte[] key, int length) Calculates an HMAC SHA256 hash using a set key length.
protected KeyPair	generateKeyPair() Creates a Diffie-Hellman key pair.
IoBuffer	generateResponse(IoBuffer input) Generates response for versioned connections.
protected int	getDHOffset0() Returns the DH byte offset.
protected int	getDHOffset1() Returns the DH byte offset.
protected int	getDigestOffset(byte[] pBuffer) Returns the digest offset using current validation scheme.
protected int	getDigestOffset0(byte[] pBuffer) Returns a digest byte offset.
protected int	getDigestOffset1(byte[] pBuffer) Returns a digest byte offset.
byte[]	getHandshakeBytes() Returns the contained handshake bytes.
protected static byte[]	getPublicKey(KeyPair keyPair) Returns the public key for a given key pair.
protected void	prepareResponse() Gets the DH offset in the handshake bytes array based on validation scheme Generates DH keypair Adds public key to handshake bytes
protected boolean	validateClient(IoBuffer input) Determines the validation scheme for given input.
protected boolean	validateClientScheme(byte[] pBuffer, int scheme)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

log

protected static org.slf4j.Logger log

HANDSHAKE_PAD_BYTES

public static byte[] HANDSHAKE_PAD_BYTES

GENUINE_FMS_KEY

protected static final byte[] GENUINE_FMS_KEY

GENUINE_FP_KEY

protected static final byte[] GENUINE_FP_KEY

DH_MODULUS_BYTES

protected static final byte[] DH_MODULUS_BYTES

Modulus bytes from flazr

DH_MODULUS

protected static final BigInteger DH_MODULUS

DH_BASE

protected static final BigInteger DH_BASE

random

protected static final Random random

keyAgreement

protected KeyAgreement keyAgreement

handshakeBytes

protected byte[] handshakeBytes

validationScheme

protected int validationScheme

Constructor Detail

RTMPHandshake

public RTMPHandshake()

Method Detail

generateResponse

public IoBuffer generateResponse(IoBuffer input)

Generates response for versioned connections.

Specified by:

generateResponse in interface IHandshake

Parameters:

input - incoming RTMP bytes

Returns:

outgoing handshake

calculateHMAC_SHA256

public byte[] calculateHMAC_SHA256(byte[] input,
                                   byte[] key)

Calculates an HMAC SHA256 hash using a default key length.

Parameters:

input -

key -

Returns:

hmac hashed bytes

calculateHMAC_SHA256

public byte[] calculateHMAC_SHA256(byte[] input,
                                   byte[] key,
                                   int length)

Calculates an HMAC SHA256 hash using a set key length.

Parameters:

input -

key -

length -

Returns:

hmac hashed bytes

generateKeyPair

protected KeyPair generateKeyPair()

Creates a Diffie-Hellman key pair.

Returns:

dh keypair

getPublicKey

protected static byte[] getPublicKey(KeyPair keyPair)

Returns the public key for a given key pair.

Parameters:

keyPair -

Returns:

public key

validateClient

protected boolean validateClient(IoBuffer input)

Determines the validation scheme for given input.

Parameters:

input -

Returns:

true if client used a supported validation scheme, false if unsupported

validateClientScheme

protected boolean validateClientScheme(byte[] pBuffer,
                                       int scheme)

getDHOffset0

protected int getDHOffset0()

Returns the DH byte offset.

Returns:

dh offset

getDHOffset1

protected int getDHOffset1()

Returns the DH byte offset.

Returns:

dh offset

getDigestOffset

protected int getDigestOffset(byte[] pBuffer)

Returns the digest offset using current validation scheme.

Parameters:

pBuffer -

Returns:

digest offset

getDigestOffset0

protected int getDigestOffset0(byte[] pBuffer)

Returns a digest byte offset.

Parameters:

pBuffer - source for digest data

Returns:

digest offset

getDigestOffset1

protected int getDigestOffset1(byte[] pBuffer)

Returns a digest byte offset.

Parameters:

pBuffer - source for digest data

Returns:

digest offset

prepareResponse

protected void prepareResponse()

Gets the DH offset in the handshake bytes array based on validation scheme Generates DH keypair Adds public key to handshake bytes

getHandshakeBytes

public byte[] getHandshakeBytes()

Returns the contained handshake bytes. These are just random bytes if the player is using an non-versioned player.

Returns:

handshake bytes