Java Hash Calculate getHash(String str, String algorithm)

Description

Return the hezadecimal representation of the string digest given the specified algorithm.

License

Apache License

Parameter

Parameter	Description
str	a parameter
algorithm	a parameter

Exception

Parameter	Description
NoSuchAlgorithmException	an exception

Declaration

private static String getHash(String str, String algorithm) throws NoSuchAlgorithmException 

Method Source Code

//package com.java2s;
/*//w w  w.  jav a2  s .  c o m
 * Copyright 2015 Ignacio del Valle Alles idelvall@brutusin.org.
 *
 * 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 {
    /**
     * Return the hezadecimal representation of the string digest given the
     * specified algorithm.
     *
     * @param str
     * @param algorithm
     * @return
     * @throws NoSuchAlgorithmException
     */
    private static String getHash(String str, String algorithm) throws NoSuchAlgorithmException {

        MessageDigest md = MessageDigest.getInstance(algorithm);
        md.update(str.getBytes());

        byte byteData[] = md.digest();

        StringBuilder hexString = new StringBuilder();
        for (int i = 0; i < byteData.length; i++) {
            String hex = Integer.toHexString(0xff & byteData[i]);
            if (hex.length() == 1) {
                hexString.append('0');
            }
            hexString.append(hex);
        }

        return hexString.toString();
    }
}

Related

1. getHash(String password, String bsalt)
2. getHash(String password, String salt)
3. getHash(String password, String salt)
4. getHash(String phrase, String algorithm)
5. getHash(String s)
6. getHash(String strDate)
7. getHash(String text)
8. getHash(String valueToHash)
9. getHash(String var)