Examples of com.maverick.util.ByteArrayReader

com.maverick.util.ByteArrayReader

Utiltiy class to read common parameter types from a byte array.
@author Lee David Painter

     * @throws InvalidKeyException
     */
    public static SshPrivateKey decodePrivateKey(byte[] encoded)
        throws InvalidKeyException {
        try {
            ByteArrayReader bar = new ByteArrayReader(encoded);
            String algorithm = bar.readString();


            if (supportsKey(algorithm)) {
                SshKeyPair pair = newInstance(algorithm);


                return pair.decodePrivateKey(encoded);

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     * @throws InvalidKeyException
     */
    public static SshPublicKey decodePublicKey(byte[] encoded)
        throws InvalidKeyException {
        try {
            ByteArrayReader bar = new ByteArrayReader(encoded);
            String algorithm = bar.readString();


            if (supportsKey(algorithm)) {
                SshKeyPair pair = newInstance(algorithm);


                return pair.decodePublicKey(encoded);

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     *
     * @return String
     */
    public String getAlgorithm() {
      try {
      ByteArrayReader r = new ByteArrayReader(keyblob);
      return r.readString();
    } catch (IOException e) {
      return null;
    }
    }

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     * @return SshPublicKey
     *
     * @throws IOException
     */
    public SshPublicKey toPublicKey() throws IOException, InvalidKeyException {
        ByteArrayReader bar = new ByteArrayReader(keyblob);
        String type = bar.readString();
        SshKeyPair pair = SshKeyPairFactory.newInstance(type);


        return pair.decodePublicKey(keyblob);
    }

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     * @param raw
     * @return String
     */
    private String getAlgorithm(byte[] raw) {
        try {
      ByteArrayReader r = new ByteArrayReader(raw);
      return r.readString();
    } catch (IOException e) {
      return null;
    }
    }

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    public SshDssPublicKey(byte[] key) throws InvalidKeyException {
        try {
            DSAPublicKeySpec dsaKey;


            // Extract the key information
            ByteArrayReader bar = new ByteArrayReader(key);
            String header = bar.readString();


            if (!header.equals(getAlgorithmName())) {
                throw new InvalidKeyException();
            }


            BigInteger p = bar.readBigInteger();
            BigInteger q = bar.readBigInteger();
            BigInteger g = bar.readBigInteger();
            BigInteger y = bar.readBigInteger();
            dsaKey = new DSAPublicKeySpec(y, p, q, g);


            KeyFactory kf = KeyFactory.getInstance("DSA");
            
            pubkey = (DSAPublicKey) kf.generatePublic(dsaKey);

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    public boolean verifySignature(byte[] signature, byte[] data)
        throws InvalidSignatureException {
        try {
            // Check for differing version of the transport protocol
            if (signature.length != 40) {
                ByteArrayReader bar = new ByteArrayReader(signature);
                byte[] sig = bar.readBinaryString();


                //if (log.isDebugEnabled()) {log.debug("Signature blob is " + new String(sig));}
                String header = new String(sig);
                if (log.isDebugEnabled())
                  log.debug("Header is " + header);


                if (!header.equals("ssh-dss")) {
                    throw new InvalidSignatureException();
                }


                signature = bar.readBinaryString();


                //if (log.isDebugEnabled()) {log.debug("Read signature from blob: " + new String(signature));}
            }


            // Using a SimpleASNWriter

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    public SshDssPrivateKey(byte[] key) throws InvalidKeyException {
        try {
            DSAPrivateKeySpec dsaKey;


            // Extract the key information
            ByteArrayReader bar = new ByteArrayReader(key);
            String header = bar.readString();


            if (!header.equals(getAlgorithmName())) {
                throw new InvalidKeyException();
            }


            BigInteger p = bar.readBigInteger();
            BigInteger q = bar.readBigInteger();
            BigInteger g = bar.readBigInteger();
            BigInteger x = bar.readBigInteger();
            dsaKey = new DSAPrivateKeySpec(x, p, q, g);


            KeyFactory kf = KeyFactory.getInstance("DSA");
            prvkey = (DSAPrivateKey) kf.generatePrivate(dsaKey);
        } catch (Exception e) {

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      }
      }
  }


  public byte[] open(byte[] data) throws IOException, ChannelOpenException {
    ByteArrayReader msg = new ByteArrayReader(data);
    this.hostname = msg.readString();
    this.port = (int) msg.readInt();
        this.socket = MultiplexedSocketFactory.getDefault().createSocket(hostname, port);
    return null;
  }

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  /* (non-Javadoc)
   * @see com.maverick.multiplex.MultiplexChannel#open(int, byte[])
   */
  public byte[] open(byte[] data) throws IOException {
    ByteArrayReader reader = new ByteArrayReader(data);
    hostname = reader.readString();
    port = (int)reader.readInt();


    socket = new Socket(hostname, port);


    return null;
  }

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