Package org.red5.server.net.rtmp

Class RTMPHandshake

java.lang.Object
org.red5.server.net.rtmp.RTMPHandshake
All Implemented Interfaces:
IHandshake
Direct Known Subclasses:
InboundHandshake
public abstract 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 ([email protected]), Steven Zimmer ([email protected]), Gavriloaie Eugen-Andrei, Ari-Pekka Viitanen, Paul Gregoire, Tiago Jacobs

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    protected int
    algorithm
     
    protected static final byte[][]
    BLOWFISH_KEYS
    Blowfish keys for RTMPE (RTMP type 0x09) - 16 x 24
    protected org.apache.mina.core.buffer.IoBuffer
    buffer
     
    protected Cipher
    cipherIn
     
    protected Cipher
    cipherOut
     
    protected static final BigInteger
    DH_BASE
     
    protected static final BigInteger
    DH_MODULUS
     
    protected static final byte[]
    DH_MODULUS_BYTES
    "Second Oakley Default Group" from RFC2409, section 6.2.
    protected static final int
    DIGEST_LENGTH
     
    protected boolean
    fp9Handshake
     
    static final byte[]
    GENUINE_FMS_KEY
     
    static final byte[]
    GENUINE_FP_KEY
     
    static final String[]
    HANDSHAKE_TYPES
     
    protected byte[]
    handshakeBytes
     
    protected byte
    handshakeType
     
    protected byte[]
    incomingPublicKey
     
    protected static final int
    KEY_LENGTH
     
    protected KeyAgreement
    keyAgreement
     
    protected org.slf4j.Logger
    log
     
    protected byte[]
    outgoingPublicKey
     
    protected static final Random
    random
     
    protected int
    swfSize
     
    protected byte[]
    swfVerificationBytes
     
    protected static final int[][]
    XTEA_KEYS
    XTEA keys for RTMPE (RTMP type 0x08) - 16 x 4

  • Constructor Summary

    Constructors
    Constructor
    Description
    RTMPHandshake()
     
    RTMPHandshake(byte handshakeType)
     

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    addBuffer(byte[] in)
    Add a byte array to the buffer.
    void
    addBuffer(org.apache.mina.core.buffer.IoBuffer in)
    Add a IoBuffer to the buffer.
    void
    calculateDigest(int digestPos, byte[] handshakeMessage, int handshakeOffset, byte[] key, int keyLen, byte[] digest, int digestOffset)
    Calculates the digest given the its offset in the handshake data.
    void
    calculateHMAC_SHA256(byte[] message, int messageOffset, int messageLen, byte[] key, int keyLen, byte[] digest, int digestOffset)
    Calculates an HMAC SHA256 hash into the digest at the given offset.
    void
    calculateSwfVerification(byte[] handshakeMessage, byte[] swfHash, int swfSize)
    Calculates the swf verification token.
    protected abstract void
    createHandshakeBytes()
    Create the initial bytes for a request / response.
    protected KeyPair
    generateKeyPair()
    Creates a Diffie-Hellman key pair.
    static final void
    getBlowfishSignature(byte[] array, int offset, int keyid)
    RTMPE type 9 uses Blowfish on the regular signature http://en.wikipedia.org/wiki/Blowfish_(cipher)
    byte[]
    getBuffer()
    Returns buffered byte array.
    org.apache.mina.core.buffer.IoBuffer
    getBufferAsIoBuffer()
    Returns buffered IoBuffer itself.
    int
    getBufferSize()
    Returns the buffer size.
    Cipher
    getCipherIn()
    Returns the contained handshake bytes.
    Cipher
    getCipherOut()
    Gets the DH offset in the handshake bytes array based on validation scheme Generates DH keypair Adds public key to handshake bytes
    int
    getDHOffset(int algorithm, byte[] handshake, int bufferOffset)
    Returns the DH offset from an array of bytes.
    protected int
    getDHOffset1(byte[] handshake, int bufferOffset)
    Returns the DH byte offset.
    protected int
    getDHOffset2(byte[] handshake, int bufferOffset)
    Returns the DH byte offset.
    int
    getDigestOffset(int algorithm, byte[] handshake, int bufferOffset)
    Returns the digest offset using current validation scheme.
    protected int
    getDigestOffset1(byte[] handshake, int bufferOffset)
    Returns a digest byte offset.
    protected int
    getDigestOffset2(byte[] handshake, int bufferOffset)
    Returns a digest byte offset.
    byte
    getHandshakeType()
    Returns the handshake type.
    protected byte[]
    getPublicKey(KeyPair keyPair)
    Returns the public key for a given key pair.
    protected byte[]
    getSharedSecret(byte[] publicKeyBytes, KeyAgreement agreement)
    Determines the validation scheme for given input.
    byte[]
    getSwfVerificationBytes()
    Returns the SWF verification bytes.
    static final void
    getXteaSignature(byte[] array, int offset, int keyid)
    RTMPE type 8 uses XTEA on the regular signature http://en.wikipedia.org/wiki/XTEA
    protected void
    initRC4Encryption(byte[] sharedSecret)
    Prepare the ciphers.
    void
    setHandshakeType(byte handshakeType)
    Sets the handshake type.
    boolean
    useEncryption()
    Whether or not encryptions is in use.
    abstract boolean
    validate(byte[] handshake)
    Determines the validation scheme for given input.
    static final boolean
    validHandshakeType(byte handshakeType)
    Returns whether or not a given handshake type is valid.
    boolean
    verifyDigest(int digestPos, byte[] handshakeMessage, byte[] key, int keyLen)
    Verifies the digest.

    Methods inherited from class java.lang.Object

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

    Methods inherited from interface org.red5.server.net.IHandshake

    doHandshake

  • Field Details

    • log

      protected org.slf4j.Logger log

    • HANDSHAKE_TYPES

      public static final String[] HANDSHAKE_TYPES

    • GENUINE_FMS_KEY

      public static final byte[] GENUINE_FMS_KEY

    • GENUINE_FP_KEY

      public static final byte[] GENUINE_FP_KEY

    • DH_MODULUS_BYTES

      protected static final byte[] DH_MODULUS_BYTES
      "Second Oakley Default Group" from RFC2409, section 6.2.

    • XTEA_KEYS

      protected static final int[][] XTEA_KEYS
      XTEA keys for RTMPE (RTMP type 0x08) - 16 x 4

    • BLOWFISH_KEYS

      protected static final byte[][] BLOWFISH_KEYS
      Blowfish keys for RTMPE (RTMP type 0x09) - 16 x 24

    • DH_MODULUS

      protected static final BigInteger DH_MODULUS

    • DH_BASE

      protected static final BigInteger DH_BASE

    • DIGEST_LENGTH

      protected static final int DIGEST_LENGTH
      See Also:

    • KEY_LENGTH

      protected static final int KEY_LENGTH
      See Also:

    • random

      protected static final Random random

    • keyAgreement

      protected KeyAgreement keyAgreement

    • cipherOut

      protected Cipher cipherOut

    • cipherIn

      protected Cipher cipherIn

    • handshakeType

      protected byte handshakeType

    • handshakeBytes

      protected byte[] handshakeBytes

    • incomingPublicKey

      protected byte[] incomingPublicKey

    • outgoingPublicKey

      protected byte[] outgoingPublicKey

    • swfSize

      protected int swfSize

    • swfVerificationBytes

      protected byte[] swfVerificationBytes

    • algorithm

      protected int algorithm

    • fp9Handshake

      protected boolean fp9Handshake

    • buffer

      protected org.apache.mina.core.buffer.IoBuffer buffer

  • Constructor Details

    • RTMPHandshake

      public RTMPHandshake()

    • RTMPHandshake

      public RTMPHandshake(byte handshakeType)

  • Method Details

    • initRC4Encryption

      protected void initRC4Encryption(byte[] sharedSecret)
      Prepare the ciphers.
      Parameters:
      sharedSecret - shared secret byte sequence

    • generateKeyPair

      protected KeyPair generateKeyPair()
      Creates a Diffie-Hellman key pair.
      Returns:
      dh keypair

    • getPublicKey

      protected byte[] getPublicKey(KeyPair keyPair)
      Returns the public key for a given key pair.
      Parameters:
      keyPair - key pair
      Returns:
      public key

    • getSharedSecret

      protected byte[] getSharedSecret(byte[] publicKeyBytes, KeyAgreement agreement)
      Determines the validation scheme for given input.
      Parameters:
      publicKeyBytes - public key bytes
      agreement - key agreement
      Returns:
      shared secret bytes if client used a supported validation scheme

    • createHandshakeBytes

      protected abstract void createHandshakeBytes()
      Create the initial bytes for a request / response.

    • validate

      public abstract boolean validate(byte[] handshake)
      Determines the validation scheme for given input.
      Specified by:
      validate in interface IHandshake
      Parameters:
      handshake - handshake byte sequence
      Returns:
      true if its a supported validation scheme, false if unsupported

    • calculateDigest

      public void calculateDigest(int digestPos, byte[] handshakeMessage, int handshakeOffset, byte[] key, int keyLen, byte[] digest, int digestOffset)
      Calculates the digest given the its offset in the handshake data.
      Parameters:
      digestPos - digest position
      handshakeMessage - handshake message
      handshakeOffset - handshake message offset
      key - contains the key
      keyLen - the length of the key
      digest - contains the calculated digest
      digestOffset - digest offset

    • verifyDigest

      public boolean verifyDigest(int digestPos, byte[] handshakeMessage, byte[] key, int keyLen)
      Verifies the digest.
      Parameters:
      digestPos - digest position
      handshakeMessage - handshake message
      key - contains the key
      keyLen - the length of the key
      Returns:
      true if valid and false otherwise

    • calculateHMAC_SHA256

      public void calculateHMAC_SHA256(byte[] message, int messageOffset, int messageLen, byte[] key, int keyLen, byte[] digest, int digestOffset)
      Calculates an HMAC SHA256 hash into the digest at the given offset.
      Parameters:
      message - incoming bytes
      messageOffset - message offset
      messageLen - message length
      key - incoming key bytes
      keyLen - the length of the key
      digest - contains the calculated digest
      digestOffset - digest offset

    • calculateSwfVerification

      public void calculateSwfVerification(byte[] handshakeMessage, byte[] swfHash, int swfSize)
      Calculates the swf verification token.
      Parameters:
      handshakeMessage - servers handshake bytes
      swfHash - hash of swf
      swfSize - size of swf

    • getDHOffset

      public int getDHOffset(int algorithm, byte[] handshake, int bufferOffset)
      Returns the DH offset from an array of bytes.
      Parameters:
      algorithm - validation algorithm
      handshake - handshake sequence
      bufferOffset - buffer offset
      Returns:
      DH offset

    • getDHOffset1

      protected int getDHOffset1(byte[] handshake, int bufferOffset)
      Returns the DH byte offset.
      Parameters:
      handshake - handshake sequence
      bufferOffset - buffer offset
      Returns:
      dh offset

    • getDHOffset2

      protected int getDHOffset2(byte[] handshake, int bufferOffset)
      Returns the DH byte offset.
      Parameters:
      handshake - handshake sequence
      bufferOffset - buffer offset
      Returns:
      dh offset

    • getDigestOffset

      public int getDigestOffset(int algorithm, byte[] handshake, int bufferOffset)
      Returns the digest offset using current validation scheme.
      Parameters:
      algorithm - validation algorithm
      handshake - handshake sequence
      bufferOffset - buffer offset
      Returns:
      digest offset

    • getDigestOffset1

      protected int getDigestOffset1(byte[] handshake, int bufferOffset)
      Returns a digest byte offset.
      Parameters:
      handshake - handshake sequence
      bufferOffset - buffer offset
      Returns:
      digest offset

    • getDigestOffset2

      protected int getDigestOffset2(byte[] handshake, int bufferOffset)
      Returns a digest byte offset.
      Parameters:
      handshake - handshake sequence
      bufferOffset - buffer offset
      Returns:
      digest offset

    • getXteaSignature

      public static final void getXteaSignature(byte[] array, int offset, int keyid)
      RTMPE type 8 uses XTEA on the regular signature http://en.wikipedia.org/wiki/XTEA
      Parameters:
      array - array to get signature
      offset - offset to start from
      keyid - ID of XTEA key

    • getBlowfishSignature

      public static final void getBlowfishSignature(byte[] array, int offset, int keyid)
      RTMPE type 9 uses Blowfish on the regular signature http://en.wikipedia.org/wiki/Blowfish_(cipher)
      Parameters:
      array - array to get signature
      offset - offset to start from
      keyid - ID of XTEA key

    • validHandshakeType

      public static final boolean validHandshakeType(byte handshakeType)
      Returns whether or not a given handshake type is valid.
      Parameters:
      handshakeType - the type of handshake
      Returns:
      true if valid and supported, false otherwise

    • useEncryption

      public boolean useEncryption()
      Whether or not encryptions is in use.
      Specified by:
      useEncryption in interface IHandshake
      Returns:
      true if handshake type is an encrypted type, false otherwise

    • setHandshakeType

      public void setHandshakeType(byte handshakeType)
      Sets the handshake type. Currently only two types are supported, plain and encrypted.
      Parameters:
      handshakeType - handshake type

    • getHandshakeType

      public byte getHandshakeType()
      Returns the handshake type.
      Returns:
      handshakeType

    • getCipherOut

      public Cipher getCipherOut()
      Gets the DH offset in the handshake bytes array based on validation scheme Generates DH keypair Adds public key to handshake bytes
      Returns:
      cipher

    • getCipherIn

      public Cipher getCipherIn()
      Returns the contained handshake bytes. These are just random bytes if the player is using an non-versioned player.
      Returns:
      cipher

    • getSwfVerificationBytes

      public byte[] getSwfVerificationBytes()
      Returns the SWF verification bytes.
      Returns:
      swf verification bytes

    • getBufferSize

      public int getBufferSize()
      Returns the buffer size.
      Returns:
      buffer remaining

    • addBuffer

      public void addBuffer(byte[] in)
      Add a byte array to the buffer.
      Parameters:
      in - incoming bytes

    • addBuffer

      public void addBuffer(org.apache.mina.core.buffer.IoBuffer in)
      Add a IoBuffer to the buffer.
      Parameters:
      in - incoming IoBuffer

    • getBufferAsIoBuffer

      public org.apache.mina.core.buffer.IoBuffer getBufferAsIoBuffer()
      Returns buffered IoBuffer itself.
      Returns:
      IoBuffer

    • getBuffer

      public byte[] getBuffer()
      Returns buffered byte array.
      Returns:
      bytes