Examples of com.sun.midp.crypto.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.

     */
    public static byte[] getHash(byte[] data, int offset, int length) {


        byte[] tmp = new byte[20];
        try {
            MessageDigest md = MessageDigest.getInstance("SHA-1");
            md.update(data, offset, length);
            md.digest(tmp, 0, tmp.length);
        } catch (GeneralSecurityException e) {
            // algorithm not found - not in this implementation
            throw new RuntimeException(
                "SHA-1 algorithm for MessageDigest not supported");
        }

Examples of com.sun.midp.crypto.MessageDigest

Related Classes of com.sun.midp.crypto.MessageDigest