Examples of java.security.MessageDigest.reset()

java.security.MessageDigest.reset()
Resets the digest for further use.

      MessageDigest messageDigest = THREAD_LOCAL_SHA1.get();
      if (messageDigest == null) {
        messageDigest = getSha1();
        THREAD_LOCAL_SHA1.set(messageDigest);
      } else {
        messageDigest.reset();
      }
      return messageDigest;
    } else {
      return getSha1();
    }

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        MessageDigest messageDigest = null;  
  
        try {  
            messageDigest = MessageDigest.getInstance("MD5");  
  
            messageDigest.reset();  
  
            messageDigest.update(str.getBytes("UTF-8"));  
        } catch (NoSuchAlgorithmException e) {  
            System.out.println("NoSuchAlgorithmException caught!");  
            System.exit(-1);

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  public static String getEncryptedPassword(String strPasswordToBeEncrypted) {
    System.out.println(strPasswordToBeEncrypted);
    byte[] defaultBytes = strPasswordToBeEncrypted.getBytes();
    try {
      MessageDigest algorithm = MessageDigest.getInstance("MD5");
      algorithm.reset();
      algorithm.update(defaultBytes);
      byte messageDigest[] = algorithm.digest();


      StringBuffer hexString = new StringBuffer();
      for (int iCounter = 0; iCounter < messageDigest.length; iCounter++) {

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   * @throws UnsupportedEncodingException
   */
  public String hash(String str) throws NoSuchAlgorithmException, UnsupportedEncodingException {
  MessageDigest digest = MessageDigest.getInstance("SHA-1");
  byte[] input = digest.digest(str.getBytes("UTF-8"));
  digest.reset();
  byte[] enc = digest.digest(input);
  return com.google.appengine.repackaged.com.google.common.util.Base64.encode(enc);
  }


  /**

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    public void testUsernameTokenDigestText() throws Exception {
        WSSecUsernameToken builder = new WSSecUsernameToken();
        builder.setPasswordType(WSConstants.PASSWORD_TEXT);
        byte[] password = "verySecret".getBytes();
        MessageDigest sha = MessageDigest.getInstance("MD5");
        sha.reset();
        sha.update(password);
        String passwdDigest = Base64.encode(sha.digest());
        
        builder.setUserInfo("wernerd", passwdDigest);
        LOG.info("Before adding UsernameToken PW Text....");

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    private String getSHA1(byte[] input) {
        MessageDigest sha;
        try {
            sha = MessageDigest.getInstance("SHA-1");
            sha.reset();
            sha.update(input);
            byte[] data = sha.digest();
            return Base64.encode(data);
        } catch (NoSuchAlgorithmException e) {
            //REVISIT

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            alg = MessageDigest.getInstance("SHA-1");
        } catch (NoSuchAlgorithmException ex) {
            // this should never happen
            throw new MathInternalError(ex);
        }
        alg.reset();


        // Compute number of iterations required (40 bytes each)
        int numIter = (len / 40) + 1;


        StringBuilder outBuffer = new StringBuilder();

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        } while (bytesRead != -1);
        in.close();


        /* Compute the checksum with the digest */
        byte[] byteChecksum = digest.digest();
        digest.reset();


        return toHexString(byteChecksum);
    }


    /**

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    }


    public static String getMD5(String plaintext) throws NoSuchAlgorithmException
    {
      MessageDigest m = MessageDigest.getInstance("MD5");
      m.reset();
      m.update(plaintext.getBytes());
      byte[] digest = m.digest();
      BigInteger bigInt = new BigInteger(1, digest);
      String hashtext = bigInt.toString(16);

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        InputStream stream = null;
        try {
            stream = new FileInputStream(file);
            
            MessageDigest digester = MessageDigest.getInstance(algorithm);
            digester.reset();


            byte buf[] = new byte[4096];
            int len = 0;


            while ((len = stream.read(buf, 0, 1024)) != -1) {

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