/*
 * 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.
 */

package org.apache.sshd.common.config.keys.loader.openssh;

import java.net.URL;
import java.security.KeyPair;
import java.security.PublicKey;
import java.util.Collection;
import java.util.List;

import org.apache.sshd.common.config.keys.BuiltinIdentities;
import org.apache.sshd.common.config.keys.loader.openssh.kdf.BCryptKdfOptions;
import org.apache.sshd.common.config.keys.loader.openssh.kdf.BCryptKdfOptions.BCryptBadRoundsException;
import org.apache.sshd.util.test.JUnit4ClassRunnerWithParametersFactory;
import org.apache.sshd.util.test.NoIoTestCase;
import org.junit.After;
import org.junit.Before;
import org.junit.FixMethodOrder;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;
import org.junit.runners.MethodSorters;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;
import org.junit.runners.Parameterized.UseParametersRunnerFactory;

/**
 * @author <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a>
 */
@FixMethodOrder(MethodSorters.NAME_ASCENDING)
@RunWith(Parameterized.class)   // see https://github.com/junit-team/junit/wiki/Parameterized-tests
@UseParametersRunnerFactory(JUnit4ClassRunnerWithParametersFactory.class)
@Category({ NoIoTestCase.class })
public class OpenSSHMaxBCryptRoundsSettingTest extends OpenSSHKeyPairResourceParserTestSupport {
    public OpenSSHMaxBCryptRoundsSettingTest(BuiltinIdentities identity) {
        super(identity);
    }

    @Parameters(name = "type={0}")
    public static List<Object[]> parameters() {
        return parameterize(BuiltinIdentities.VALUES);
    }

    @Before
    public void setUp() {
        BCryptKdfOptions.setMaxAllowedRounds(1);    // we know all our test cases use 16
    }

    @After
    public void tearDown() {
        BCryptKdfOptions.setMaxAllowedRounds(BCryptKdfOptions.DEFAULT_MAX_ROUNDS);
    }

    @Test
    public void testMaxRoundsSettingFailure() throws Exception {
        testLoadKeyPairs(true, DEFAULT_PASSWORD_PROVIDER);
    }

    @Override
    protected void testLoadKeyPairs(
            boolean encrypted, String resourceKey, Collection<KeyPair> pairs,  PublicKey pubEntry)
                throws Exception {
        fail("Unexpected success for " + resourceKey + " - decoded " + pairs.size() + " keys");
    }

    @Override
    protected Exception handleResourceLoadException(String resourceKey, URL urlKeyPair, Exception reason) {
        assertObjectInstanceOf("Mismatched failure reason", BCryptBadRoundsException.class, reason);
        return null;
    }
}
