Examples of MessageDigest

com.sun.midp.crypto.MessageDigest
This MessageDigest class provides applications the functionality of a message digest algorithm, such as MD5 or SHA. Message digests are secure one-way hash functions that take arbitrary-sized data and output a fixed-length hash value.
A MessageDigest object starts out initialized. The data is processed through it using the update method. At any point {@link #reset() reset} can be calledto reset the digest. Once all the data to be updated has been updated, the digest method should be called to complete the hash computation.
The digest method can be called once for a given number of updates. After digest has been called, the MessageDigest object is reset to its initialized state.
java.security.MessageDigest
This MessageDigest class provides applications the functionality of a message digest algorithm, such as MD5 or SHA. Message digests are secure one-way hash functions that take arbitrary-sized data and output a fixed-length hash value.
A MessageDigest object starts out initialized. The data is processed through it using the {@link #update(byte) update}methods. At any point {@link #reset() reset} can be calledto reset the digest. Once all the data to be updated has been updated, one of the {@link #digest() digest} methods should be called to complete the hash computation.
The digest method can be called once for a given number of updates. After digest has been called, the MessageDigest object is reset to its initialized state.
Implementations are free to implement the Cloneable interface. Client applications can test cloneability by attempting cloning and catching the CloneNotSupportedException:
```
 MessageDigest md = MessageDigest.getInstance("SHA"); try { md.update(toChapter1); MessageDigest tc1 = md.clone(); byte[] toChapter1Digest = tc1.digest(); md.update(toChapter2); ...etc. } catch (CloneNotSupportedException cnse) { throw new DigestException("couldn't make digest of partial content"); } 
```
Note that if a given implementation is not cloneable, it is still possible to compute intermediate digests by instantiating several instances, if the number of digests is known in advance.
Note that this class is abstract and extends from MessageDigestSpi for historical reasons. Application developers should only take notice of the methods defined in this MessageDigest class; all the methods in the superclass are intended for cryptographic service providers who wish to supply their own implementations of message digest algorithms. @author Benjamin Renaud @version 1.82, 09/07/09 @see DigestInputStream @see DigestOutputStream

Examples of java.security.MessageDigest

    if (algorithmID == null) {
      Object[] exArgs = { algorithmURI };
      throw new XMLSignatureException("algorithms.NoSuchMap", exArgs);
    }


      MessageDigest md;
      String provider=JCEMapper.getProviderId();
      try {        
         if (provider==null) {
           md = MessageDigest.getInstance(algorithmID);
         } else {

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Examples of java.security.MessageDigest

     *      href="http://java.sun.com/j2se/1.5.0/docs/guide/rmi/spec/rmi-stubs24.html">Method
     *      hashing of RMI</a>
     */
    public static long hashMethod(final String methodName, final String methodDescriptor) {


        MessageDigest md;
        try {
            md = MessageDigest.getInstance("SHA-1");
        } catch (NoSuchAlgorithmException e) {
            throw new IllegalStateException("Algorithm SHA-1 is not available", e);
        }
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        DigestOutputStream dos = new DigestOutputStream(baos, md);
        DataOutputStream das = new DataOutputStream(dos);


        StringBuilder sb = new StringBuilder();
        sb.append(methodName);
        sb.append(methodDescriptor);
        try {
            das.writeUTF(sb.toString());
        } catch (IOException e) {
            throw new IllegalStateException("Cannot write data for method '" + methodName + "'.", e);
        }
        try {
            das.flush();
        } catch (IOException e) {
            logger.warn("Cannot flush the stream", e);
        }
        try {
            das.close();
        } catch (IOException e) {
            logger.warn("Cannot flush the stream", e);
        }


        byte[] digest = md.digest();
        long hash = 0;
        int size = Math.min(digest.length, BYTES_LENGTH);
        for (int i = 0; i < size; i++) {
            hash += (long) (digest[i] & BYTE_MASK) << (BYTES_LENGTH * i);
        }

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Examples of java.security.MessageDigest

     */
    public DESCrypt(String password) {
        try {


            // Generate the key by taking the MD5 of the password
            MessageDigest md5 = MessageDigest.getInstance("MD5");
            byte[] md5Key = md5.digest(password.getBytes("UTF-8"));


            // Generate the key by compressing 8 bytes to 7
            byte[] inKey = new byte[8];
            inKey[0] = md5Key[0];
            inKey[1] = (byte) (((md5Key[0] & 0xFF) << 7) |

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Examples of java.security.MessageDigest

     * @param password
     *            The encryption password
     */
    public AESCrypt(String password) {
        try {
            MessageDigest md5 = MessageDigest.getInstance("MD5");
            byte[] md5Key = md5.digest(password.getBytes("UTF-8"));


            SecretKeySpec secretKey = new SecretKeySpec(md5Key, "AES");


            decrypter = Cipher.getInstance("AES/ECB/NoPadding");
            encrypter = Cipher.getInstance("AES/ECB/NoPadding");

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Examples of java.security.MessageDigest

        return hash(plaintext.toCharArray());
    }


    public static String hash(char[] plaintext){
        try {
            MessageDigest sha = MessageDigest.getInstance(hashAlgorithm);
            byte[] hash = sha.digest(charArrayToByteArray(plaintext));
            return byteArrayToHexString(hash);
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException(e);
        }
    }

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Examples of java.security.MessageDigest

            {
                InputStream is = jarLocation.openStream();
                try
                {
                    int jarSize = 0;
                    MessageDigest md = MessageDigest.getInstance( "MD5" );
                    int data;
                    while ( ( data = is.read() ) >= 0 )
                    {
                        jarSize++;
                        md.update( (byte)( data & 0xff ) );
                    }
                    m_outDebug.println( getRes().getString( "    Size: {0}", new Integer( jarSize ) ) );
                    
                    byte[] bytes = md.digest();
                    StringBuffer sb = new StringBuffer();
                    for ( int i = 0; i < bytes.length; i++ )
                    {
                        String val = Integer.toString( bytes[i] & 0xff, 16 ).toLowerCase();
                        if ( val.length() == 1 )

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Examples of java.security.MessageDigest

    }
      }


      dout.flush();


      MessageDigest md = MessageDigest.getInstance("SHA");
      if (TRACE_UID) System.out.println(dump(bout.toByteArray()));
      
      byte[] hashBytes = md.digest(bout.toByteArray());
      long hash = 0;
      for (int i = Math.min(hashBytes.length, 8) - 1; i >= 0; i--) {
    hash = (hash << 8) | (hashBytes[i] & 0xFF);
      }
      return hash;

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Examples of java.security.MessageDigest

 {
  StringBuffer out = new StringBuffer();
  try 
  { 
   //*-- create a message digest instance and compute the hash byte array
   MessageDigest md = MessageDigest.getInstance("SHA-1"); 
   md.reset(); md.update(in.getBytes());
   byte[] hash = md.digest(); 


   //*--- Convert the hash byte array to hexadecimal format, pad hex chars with leading zeroes
   //*--- to get a signature of consistent length (40) for all strings.
   for (int i = 0; i < hash.length; i++)
   { out.append( fillin(Integer.toString(0xFF & hash[i], 16), 2, false, '0', 1) ); }

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Examples of java.security.MessageDigest

         */
        public String createMD5Sum() {
            String out = "";
            try {
                byte[] digest;
                MessageDigest md = MessageDigest.getInstance("MD5");
                BufferedInputStream bis = new BufferedInputStream(new FileInputStream(fFile));
                byte[] buff = new byte[1024];
                int chunk = 1024;
                int bytesRead = 0;
                while ((bytesRead = bis.read(buff, 0, chunk)) != -1) {
                    md.update(buff, 0, bytesRead);
                }
                digest = md.digest();
                String hexChar = null;
                if (digest != null) {
                    for (int i = 0; i < digest.length; i++) {
                        if (digest[i] > 0) {
                            hexChar = Integer.toHexString(digest[i]);

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Examples of java.security.MessageDigest

   * @return encypted password based on the algorithm.
   */
  public static String encode(String password, String algorithm) {
    byte[] unencodedPassword = password.getBytes();


    MessageDigest md = null;


    try {
      // first create an instance, given the provider
      md = MessageDigest.getInstance(algorithm);
    } catch (Exception e) {
      logger.error("Exception:{}", e);
      return password;
    }


    md.reset();


    // call the update method one or more times
    // (useful when you don't know the size of your data, eg. stream)
    md.update(unencodedPassword);


    // now calculate the hash
    byte[] encodedPassword = md.digest();


    StringBuilder buf = new StringBuilder();


    for (int i = 0; i < encodedPassword.length; i++) {
      if ((encodedPassword[i] & 0xff) < 0x10) {

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