/**
* Initializes the HMAC with the given secret key and algorithm parameters.
*
* @param key the secret key.
* @param params the algorithm parameters.
* @exception InvalidKeyException if the given key is inappropriate for initializing this MAC.
* @exception InvalidAlgorithmParameterException if the given algorithm parameters are
* inappropriate for this MAC.
*/
protected void engineInit(Key key, AlgorithmParameterSpec params)
throws InvalidKeyException, InvalidAlgorithmParameterException {
hmac.init(key, params);
}
