Java HMAC hmac(String msg, String keyString)

Description

hmac

License

Open Source License

Declaration

public static String hmac(String msg, String keyString) 

Method Source Code

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

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.io.UnsupportedEncodingException;

import java.security.InvalidKeyException;

import java.security.NoSuchAlgorithmException;

public class Main {

    public static String hmac(String msg, String keyString) {
        String digest = null;/*from  w w w .ja  va 2s .c  o  m*/
        try {
            SecretKeySpec key = new SecretKeySpec((keyString).getBytes("UTF-8"), "HmacMD5");
            Mac mac = Mac.getInstance("HmacMD5");
            mac.init(key);

            byte[] bytes = mac.doFinal(msg.getBytes("UTF-8"));

            StringBuffer hash = new StringBuffer();
            for (int i = 0; i < bytes.length; i++) {
                String hex = Integer.toHexString(0xFF & bytes[i]);
                if (hex.length() == 1) {
                    hash.append('0');
                }
                hash.append(hex);
            }
            digest = hash.toString();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        return digest;
    }
}

Related

1. hmac(byte key[], byte text[])
2. hmac(String hash, String data, String key)
3. HMAC(String username, BigInteger nonce, String hashedPassword)
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)