Java HMAC hmacEncode(String algorithm, String input, String privateKey)

Description

hmac Encode

License

Apache License

Declaration

public static String hmacEncode(String algorithm, String input, String privateKey)
            throws IllegalArgumentException 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.NoSuchAlgorithmException;

public class Main {
    public static String hmacEncode(String algorithm, String input, String privateKey)
            throws IllegalArgumentException {
        try {// www  .ja  va 2 s . com
            byte[] keyBytes = privateKey.getBytes();
            Key key = new SecretKeySpec(keyBytes, 0, keyBytes.length, algorithm);
            Mac mac = Mac.getInstance(algorithm);
            mac.init(key);
            return byteArrayToHex(mac.doFinal(input.getBytes()));
        } catch (NoSuchAlgorithmException ex) {
            throw new IllegalArgumentException("Unknown algorithm: " + algorithm);
        } catch (InvalidKeyException ex) {
            throw new IllegalArgumentException("Illegal key: " + privateKey);
        }
    }

    protected static String byteArrayToHex(byte[] bytes) {
        int hn, ln, cx;
        String hexDigitChars = "0123456789abcdef";
        StringBuffer buf = new StringBuffer(bytes.length * 2);
        for (cx = 0; cx < bytes.length; cx++) {
            hn = ((int) (bytes[cx]) & 0x00ff) / 16;
            ln = ((int) (bytes[cx]) & 0x000f);
            buf.append(hexDigitChars.charAt(hn));
            buf.append(hexDigitChars.charAt(ln));
        }
        return buf.toString();
    }
}

Related

1. hmac(String msg, String keyString)
2. HMAC(String username, BigInteger nonce, String hashedPassword)
3. hmac_sha(String crypto, byte[] keyBytes, byte[] text)
4. hmac_sha(String crypto, byte[] keyBytes, byte[] text)
5. hmacDigest(String message, String secretKey, String algorithm)
6. hmacHex(String keyString, String message, String hmac)
7. hmacSha(byte[] keyBytes, byte[] text)
8. hmacSha(String crypto, String key, String value)
9. hmacSha1(byte[] data, byte[] key)