Java MD5 newMD5HashUri(String value)

Description

new MD Hash Uri

License

Apache License

Declaration

public final static String newMD5HashUri(String value) 

Method Source Code

//package com.java2s;
/**/*from w ww  .  j a v a 2  s. c  o  m*/
 * Copyright (C) 2010 University of Washington
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */

import java.io.UnsupportedEncodingException;

import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Main {
    public final static String newMD5HashUri(String value) {
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            byte[] asBytes;
            try {
                asBytes = value.getBytes("UTF-8");
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
                throw new IllegalStateException("unexpected", e);
            }
            md.update(asBytes);

            byte[] messageDigest = md.digest();

            BigInteger number = new BigInteger(1, messageDigest);
            String md5 = number.toString(16);
            while (md5.length() < 32)
                md5 = "0" + md5;
            return "md5:" + md5;
        } catch (NoSuchAlgorithmException e) {
            throw new IllegalStateException("Unexpected problem computing md5 hash", e);
        }
    }

    public final static String newMD5HashUri(byte[] asBytes) {
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.update(asBytes);

            byte[] messageDigest = md.digest();

            BigInteger number = new BigInteger(1, messageDigest);
            String md5 = number.toString(16);
            while (md5.length() < 32)
                md5 = "0" + md5;
            return "md5:" + md5;
        } catch (NoSuchAlgorithmException e) {
            throw new IllegalStateException("Unexpected problem computing md5 hash", e);
        }
    }
}

Related

1. md5Memcpy(byte[] output, byte[] input, int outpos, int inpos, int len)
2. md5ToHex(byte[] hash)
3. md5ToString(byte[] md5sum)
4. md5Update(byte[] inbuf, int inputLen)
5. newMd5()
6. newMd5MessageDigest()
7. validateMD5(String md5String)