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.


    // Add key.
    md2.update(key.getBytes());


    // Add salt.
    md2.update(salt.getBytes(), 0, saltLen);


    // Add key again.
    md2.update(key.getBytes());


    // Now get result of this (16 bytes) and add it to the other context.

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    // Add salt.
    md2.update(salt.getBytes(), 0, saltLen);


    // Add key again.
    md2.update(key.getBytes());


    // Now get result of this (16 bytes) and add it to the other context.
    byte[] altResult = md2.digest();


    // Add for any character in the key one byte of the alternate sum.

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   */
  static String getMD5Hash(String str) throws NoSuchAlgorithmException
  {
    MessageDigest md = MessageDigest.getInstance("MD5");


    md.update(str.getBytes());


    byte[] b = md.digest();
    StringBuffer sb = new StringBuffer();


    for(int i = 0; i < b.length; i++)

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            MessageDigest md = null;


            try {
                md = MessageDigest.getInstance("SHA-1");
                md.update(envelopedData, 0, 20);
                for (int i=0; i<recipients.size(); i++)
                {
                  byte[] encodedRecipient = ((PdfObject)recipients.getArrayList().get(i)).getBytes();  
                  md.update(encodedRecipient);
                }

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                md = MessageDigest.getInstance("SHA-1");
                md.update(envelopedData, 0, 20);
                for (int i=0; i<recipients.size(); i++)
                {
                  byte[] encodedRecipient = ((PdfObject)recipients.getArrayList().get(i)).getBytes();  
                  md.update(encodedRecipient);
                }
                if ((cryptoMode & PdfWriter.DO_NOT_ENCRYPT_METADATA) != 0)
                    md.update(new byte[]{(byte)255, (byte)255, (byte)255, (byte)255});
                encryptionKey = md.digest();

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                {
                  byte[] encodedRecipient = ((PdfObject)recipients.getArrayList().get(i)).getBytes();  
                  md.update(encodedRecipient);
                }
                if ((cryptoMode & PdfWriter.DO_NOT_ENCRYPT_METADATA) != 0)
                    md.update(new byte[]{(byte)255, (byte)255, (byte)255, (byte)255});
                encryptionKey = md.digest();
                
            } catch (Exception f) {
                throw new ExceptionConverter(f);
            }

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    logger.debug("isValidLicenseFile: Validation String Buffer: "+validationStringBuffer.toString());
    String validationKey = (String)properties.getProperty(LICENSE_FILE_SHA_KEY);
    try
    {
      MessageDigest messageDigest = MessageDigest.getInstance("SHA-1");
      messageDigest.update(validationStringBuffer.toString().getBytes());
      String newValidation = Base64.encode(messageDigest.digest());
      if (newValidation.equals(validationKey))
      {
        if (getMACAddress().equals(Settings.getInstance().getMACAddress()))
        {

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      MessageDigest md = null;
      byte[] encodedRecipient = null;


      try {
        md = MessageDigest.getInstance("SHA-1");
        md.update(publicKeyHandler.getSeed());
        for (int i = 0; i < publicKeyHandler.getRecipientsSize(); i++) {
          encodedRecipient = publicKeyHandler.getEncodedRecipient(i);
          md.update(encodedRecipient);
        }
        if (!encryptMetadata)

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      try {
        md = MessageDigest.getInstance("SHA-1");
        md.update(publicKeyHandler.getSeed());
        for (int i = 0; i < publicKeyHandler.getRecipientsSize(); i++) {
          encodedRecipient = publicKeyHandler.getEncodedRecipient(i);
          md.update(encodedRecipient);
        }
        if (!encryptMetadata)
          md.update(new byte[] { (byte) 255, (byte) 255, (byte) 255,
              (byte) 255 });
      } catch (Exception f) {

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        for (int i = 0; i < publicKeyHandler.getRecipientsSize(); i++) {
          encodedRecipient = publicKeyHandler.getEncodedRecipient(i);
          md.update(encodedRecipient);
        }
        if (!encryptMetadata)
          md.update(new byte[] { (byte) 255, (byte) 255, (byte) 255,
              (byte) 255 });
      } catch (Exception f) {
        throw new ExceptionConverter(f);
      }

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