gistfile1.java

class TestHMAC {
...
	private String calculateMAC(byte[] inputBytes, String password) throws NoSuchAlgorithmException, InvalidKeyException {
		
		SecretKeySpec signingKey = new SecretKeySpec(password.getBytes(), HMAC_SHA1_ALGORITHM);
		Mac mac = Mac.getInstance(HMAC_SHA1_ALGORITHM);
		mac.init(signingKey);
		byte[] rawHmac = mac.doFinal(inputBytes);
		return new String(Hex.encodeHex(rawHmac, true));
	}
...
}