Java HMAC hmacHex(String keyString, String message, String hmac)

Description

hmac Hex

License

Open Source License

Declaration

protected static String hmacHex(String keyString, String message,
            String hmac) 

Method Source Code

//package com.java2s;
/*/* w  ww. j a  va  2s. co  m*/
 *  Copyright (c) 2011-2015 The original author or authors
 *
 *  All rights reserved. This program and the accompanying materials
 *  are made available under the terms of the Eclipse Public License v1.0
 *  and Apache License v2.0 which accompanies this distribution.
 *
 *       The Eclipse Public License is available at
 *       http://www.eclipse.org/legal/epl-v10.html
 *
 *       The Apache License v2.0 is available at
 *       http://www.opensource.org/licenses/apache2.0.php
 *
 *  You may elect to redistribute this code under either of these licenses.
 */

import javax.crypto.Mac;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;

public class Main {
    protected static String hmacHex(String keyString, String message,
            String hmac) {
        try {
            SecretKey key = new SecretKeySpec(keyString.getBytes("UTF-8"),
                    hmac);
            Mac mac = Mac.getInstance(key.getAlgorithm());
            mac.init(key);
            return encodeHex(mac.doFinal(message.getBytes("UTF-8")));
        } catch (UnsupportedEncodingException | NoSuchAlgorithmException
                | InvalidKeyException e) {
            // doesn't happen, auth will fail in that case
            return "";
        }
    }

    /**
     * @param outBytes
     * @return
     */
    protected static String encodeHex(byte[] bytes) {
        StringBuilder sb = new StringBuilder(bytes.length * 2);
        for (byte b : bytes) {
            final int v = ((int) b) & 0xff;
            if (v < 16) {
                sb.append('0');
            }
            sb.append(Integer.toHexString(v));
        }
        return sb.toString();
    }
}

Related

1. HMAC(String username, BigInteger nonce, String hashedPassword)
2. hmac_sha(String crypto, byte[] keyBytes, byte[] text)
3. hmac_sha(String crypto, byte[] keyBytes, byte[] text)
4. hmacDigest(String message, String secretKey, String algorithm)
5. hmacEncode(String algorithm, String input, String privateKey)
6. hmacSha(byte[] keyBytes, byte[] text)
7. hmacSha(String crypto, String key, String value)
8. hmacSha1(byte[] data, byte[] key)
9. hmacSha1(byte[] key_bytes, byte[] text_bytes)