Examples of java.security.MessageDigest.update()

java.security.MessageDigest.update()
Updates the digest using the specified byte. @param input the byte with which to update the digest.

    byte[] lastBlock = new byte[16];
    
    for (int i = 0; i < encryptedPass.length; i+=16) {
      md5.reset();
      md5.update(sharedSecret);
      md5.update(i == 0 ? getAuthenticator() : lastBlock);
      byte bn[] = md5.digest();
        
      System.arraycopy(encryptedPass, i, lastBlock, 0, 16);
    
      // perform the XOR as specified by RFC 2865.

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    MessageDigest md5 = getMd5Digest();
    byte[] lastBlock = new byte[16];
    
    for (int i = 0; i < encryptedPass.length; i+=16) {
      md5.reset();
      md5.update(sharedSecret);
      md5.update(i == 0 ? getAuthenticator() : lastBlock);
      byte bn[] = md5.digest();
        
      System.arraycopy(encryptedPass, i, lastBlock, 0, 16);

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    byte[] lastBlock = new byte[16];
    
    for (int i = 0; i < encryptedPass.length; i+=16) {
      md5.reset();
      md5.update(sharedSecret);
      md5.update(i == 0 ? getAuthenticator() : lastBlock);
      byte bn[] = md5.digest();
        
      System.arraycopy(encryptedPass, i, lastBlock, 0, 16);
    
      // perform the XOR as specified by RFC 2865.

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        byte[] chapPassword = new byte[17];
        chapPassword[0] = chapIdentifier;


        MessageDigest md5 = getMd5Digest();
        md5.reset();
        md5.update(chapIdentifier);
        md5.update(RadiusUtil.getUtf8Bytes(plaintext));
        byte[] chapHash = md5.digest(chapChallenge);


        System.arraycopy(chapHash, 0, chapPassword, 1, 16);
        return chapPassword;

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        chapPassword[0] = chapIdentifier;


        MessageDigest md5 = getMd5Digest();
        md5.reset();
        md5.update(chapIdentifier);
        md5.update(RadiusUtil.getUtf8Bytes(plaintext));
        byte[] chapHash = md5.digest(chapChallenge);


        System.arraycopy(chapHash, 0, chapPassword, 1, 16);
        return chapPassword;
  }

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      throw new RadiusException("CHAP password must be 17 bytes");
    
    byte chapIdentifier = chapPassword[0];
    MessageDigest md5 = getMd5Digest();
      md5.reset();
      md5.update(chapIdentifier);
      md5.update(RadiusUtil.getUtf8Bytes(plaintext));
      byte[] chapHash = md5.digest(chapChallenge);
      
      // compare
      for (int i = 0; i < 16; i++)

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    byte chapIdentifier = chapPassword[0];
    MessageDigest md5 = getMd5Digest();
      md5.reset();
      md5.update(chapIdentifier);
      md5.update(RadiusUtil.getUtf8Bytes(plaintext));
      byte[] chapHash = md5.digest(chapChallenge);
      
      // compare
      for (int i = 0; i < 16; i++)
        if (chapHash[i] != chapPassword[i + 1])

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  public static String getMD5(final String data) {
    try {
      MessageDigest m = MessageDigest.getInstance("MD5");
      m.reset();
      m.update(data.getBytes());
      BigInteger bigInt = new BigInteger(1, m.digest());
      String hashtext = bigInt.toString(16);
      while(hashtext.length() < 32 ){
          hashtext = "0" + hashtext;
      }

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    byte[] authenticator = new byte[16];
    for (int i = 0; i < 16; i++)
      authenticator[i] = 0;
    MessageDigest md5 = getMd5Digest();
    md5.reset();
    md5.update((byte) getPacketType());
    md5.update((byte) getPacketIdentifier());
    md5.update((byte) (packetLength >> 8));
    md5.update((byte) (packetLength & 0xff));
    md5.update(authenticator, 0, authenticator.length);
    md5.update(attributes, 0, attributes.length);

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    for (int i = 0; i < 16; i++)
      authenticator[i] = 0;
    MessageDigest md5 = getMd5Digest();
    md5.reset();
    md5.update((byte) getPacketType());
    md5.update((byte) getPacketIdentifier());
    md5.update((byte) (packetLength >> 8));
    md5.update((byte) (packetLength & 0xff));
    md5.update(authenticator, 0, authenticator.length);
    md5.update(attributes, 0, attributes.length);
    md5.update(RadiusUtil.getUtf8Bytes(sharedSecret));

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