Java MD5 Hash md5hash(String key)

Description

mdhash

License

Apache License

Declaration

static String md5hash(String key) 

Method Source Code

//package com.java2s;
/**/*w  w w  . j a  v  a  2  s .c  om*/
 * Copyright 2010-present Facebook.
 *
 * 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.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Main {
    private static final String HASH_ALGORITHM_MD5 = "MD5";

    static String md5hash(String key) {
        return hashWithAlgorithm(HASH_ALGORITHM_MD5, key);
    }

    private static String hashWithAlgorithm(String algorithm, String key) {
        return hashWithAlgorithm(algorithm, key.getBytes());
    }

    private static String hashWithAlgorithm(String algorithm, byte[] bytes) {
        MessageDigest hash;
        try {
            hash = MessageDigest.getInstance(algorithm);
        } catch (NoSuchAlgorithmException e) {
            return null;
        }
        return hashBytes(hash, bytes);
    }

    private static String hashBytes(MessageDigest hash, byte[] bytes) {
        hash.update(bytes);
        byte[] digest = hash.digest();
        StringBuilder builder = new StringBuilder();
        for (int b : digest) {
            builder.append(Integer.toHexString((b >> 4) & 0xf));
            builder.append(Integer.toHexString((b >> 0) & 0xf));
        }
        return builder.toString();
    }
}

Related

1. md5Hash(String algorithm, String input)
2. md5Hash(String buf)
3. md5Hash(String content)
4. md5Hash(String in)
5. md5Hash(String input)
6. md5hash(String pass)
7. md5Hash(String source)
8. md5Hash(String text)
9. md5HashBytesToBytes(byte[] buf)