Java HMAC HMAC(String username, BigInteger nonce, String hashedPassword)

Description

This will Find HMAC and Append it to

License

Open Source License

Parameter

Parameter	Description
username	a parameter
nonce	a parameter
hashedPassword	a parameter

Exception

Parameter	Description
NoSuchAlgorithmException	an exception

Declaration

public static String HMAC(String username, BigInteger nonce, String hashedPassword)
        throws NoSuchAlgorithmException 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.io.UnsupportedEncodingException;
import java.math.BigInteger;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Main {
    /**/*  w w  w. j  a v a  2  s .c o  m*/
     * 
     * This will Find HMAC and Append it to 
     * 
     * @param username
     * @param nonce
     * @param hashedPassword
     * @return
     * @throws NoSuchAlgorithmException
     */
    public static String HMAC(String username, BigInteger nonce, String hashedPassword)
            throws NoSuchAlgorithmException {
        String hash = null;
        StringBuilder sb = new StringBuilder(14);
        sb.append(username).append(" ").append(nonce).append(" ").append(hashedPassword);
        String appended = sb.toString();
        try {
            hash = makeSHA512Hash(appended);
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return hash;
    }

    public static String makeSHA512Hash(String input)
            throws NoSuchAlgorithmException, UnsupportedEncodingException {
        MessageDigest md = MessageDigest.getInstance("SHA-512");
        md.reset();
        byte[] buffer = input.getBytes("UTF-8");
        md.update(buffer);
        byte[] digest = md.digest();
        String hexStr = "";
        for (int i = 0; i < digest.length; i++) {
            hexStr += Integer.toString((digest[i] & 0xff) + 0x100, 16).substring(1);
        }
        return hexStr;
    }
}

Related

1. hmac(byte key[], byte text[])
2. hmac(String hash, String data, String key)
3. hmac(String msg, String keyString)
4. hmac_sha(String crypto, byte[] keyBytes, byte[] text)
5. hmac_sha(String crypto, byte[] keyBytes, byte[] text)
6. hmacDigest(String message, String secretKey, String algorithm)
7. hmacEncode(String algorithm, String input, String privateKey)