/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

/**
* @author Vera Y. Petrashkova
* @version $Revision$
*/

package org.apache.harmony.crypto.tests.support;

import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.spec.AlgorithmParameterSpec;

import javax.crypto.KeyAgreementSpi;
import javax.crypto.SecretKey;
import javax.crypto.ShortBufferException;

/**
 * Additional class for verification of KeyAgreementSpi
 * and KeyAgreement functionality
 * 
 */

public class MyKeyAgreementSpi extends KeyAgreementSpi {
    
    @Override
    protected Key engineDoPhase(Key key, boolean lastPhase)
            throws InvalidKeyException, IllegalStateException {
        if (!lastPhase) {
            throw new IllegalStateException("last Phase is false");
        }
        return null;
    }

    @Override
    protected byte[] engineGenerateSecret() throws IllegalStateException {
        return new byte[0];
    }

    @Override
    protected int engineGenerateSecret(byte[] sharedSecret, int offset)
            throws IllegalStateException, ShortBufferException {
        return -1;
    }

    @Override
    protected SecretKey engineGenerateSecret(String algorithm)
            throws IllegalStateException, NoSuchAlgorithmException,
            InvalidKeyException {
        if (algorithm.length() == 0) {
            throw new NoSuchAlgorithmException("Algorithm is empty");
        }
        return null;
    }

    @Override
    protected void engineInit(Key key, SecureRandom random)
            throws InvalidKeyException {
        throw new IllegalArgumentException("Invalid parameter");
    }

    @Override
    protected void engineInit(Key key, AlgorithmParameterSpec params,
            SecureRandom random) throws InvalidKeyException,
            InvalidAlgorithmParameterException {
        throw new IllegalArgumentException("Invalid parameter");
    }
}