/**
 * Copyright 2005-2013 Restlet S.A.S.
 * 
 * The contents of this file are subject to the terms of one of the following
 * open source licenses: Apache 2.0 or LGPL 3.0 or LGPL 2.1 or CDDL 1.0 or EPL
 * 1.0 (the "Licenses"). You can select the license that you prefer but you may
 * not use this file except in compliance with one of these Licenses.
 * 
 * You can obtain a copy of the Apache 2.0 license at
 * http://www.opensource.org/licenses/apache-2.0
 * 
 * You can obtain a copy of the LGPL 3.0 license at
 * http://www.opensource.org/licenses/lgpl-3.0
 * 
 * You can obtain a copy of the LGPL 2.1 license at
 * http://www.opensource.org/licenses/lgpl-2.1
 * 
 * You can obtain a copy of the CDDL 1.0 license at
 * http://www.opensource.org/licenses/cddl1
 * 
 * You can obtain a copy of the EPL 1.0 license at
 * http://www.opensource.org/licenses/eclipse-1.0
 * 
 * See the Licenses for the specific language governing permissions and
 * limitations under the Licenses.
 * 
 * Alternatively, you can obtain a royalty free commercial license with less
 * limitations, transferable or non-transferable, directly at
 * http://www.restlet.com/products/restlet-framework
 * 
 * Restlet is a registered trademark of Restlet S.A.S.
 */

package org.restlet.test.engine;

import java.io.IOException;
import java.util.List;

import org.restlet.Request;
import org.restlet.data.ChallengeRequest;
import org.restlet.data.ChallengeResponse;
import org.restlet.data.ChallengeScheme;
import org.restlet.data.Digest;
import org.restlet.data.Method;
import org.restlet.data.Reference;
import org.restlet.engine.header.ChallengeWriter;
import org.restlet.engine.header.Header;
import org.restlet.engine.header.HeaderConstants;
import org.restlet.engine.security.AuthenticatorUtils;
import org.restlet.ext.crypto.internal.HttpAwsS3Helper;
import org.restlet.test.RestletTestCase;
import org.restlet.util.Series;

/**
 * Unit tests for the SecurityData related classes.
 * 
 * @author Jerome Louvel
 */
public class AuthenticationTestCase extends RestletTestCase {

    @Override
    protected void setUp() throws Exception {
        super.setUp();
        org.restlet.engine.Engine.clear();
    }

    /**
     * Test Amazon S3 authentication.
     */
    public void testAwsS3() {
        HttpAwsS3Helper helper = new HttpAwsS3Helper();

        // Example Object GET
        ChallengeWriter cw = new ChallengeWriter();
        ChallengeResponse challenge = new ChallengeResponse(
                ChallengeScheme.HTTP_AWS_S3, "0PN5J17HBGZHT7JJ3X82",
                "uV3F3YluFJax1cknvbcGwgjvx4QpvB+leU8dUj2o");
        Request request = new Request(Method.GET,
                "http://johnsmith.s3.amazonaws.com/photos/puppy.jpg");
        Series<Header> httpHeaders = new Series<Header>(Header.class);
        httpHeaders.add(HeaderConstants.HEADER_DATE,
                "Tue, 27 Mar 2007 19:36:42 +0000");

        helper.formatResponse(cw, challenge, request, httpHeaders);
        assertEquals("0PN5J17HBGZHT7JJ3X82:xXjDGYUmKxnwqr5KXNPGldn5LbA=",
                cw.toString());

        // Example Object PUT
        cw = new ChallengeWriter();
        request.setMethod(Method.PUT);
        httpHeaders.set(HeaderConstants.HEADER_DATE,
                "Tue, 27 Mar 2007 21:15:45 +0000", true);
        httpHeaders.add(HeaderConstants.HEADER_CONTENT_LENGTH, "94328");
        httpHeaders.add(HeaderConstants.HEADER_CONTENT_TYPE, "image/jpeg");
        helper.formatResponse(cw, challenge, request, httpHeaders);
        assertEquals("0PN5J17HBGZHT7JJ3X82:hcicpDDvL9SsO6AkvxqmIWkmOuQ=",
                cw.toString());
    }

    /**
     * Tests the authentication parsing for HTTP BASIC.
     * 
     * @throws IOException
     */
    public void testParsingBasic() throws IOException {
        String authenticate1 = "Basic realm=\"Restlet tutorial\"";
        String authorization1 = "Basic c2NvdHQ6dGlnZXI=";

        assertEquals(authorization1, AuthenticatorUtils.formatResponse(
                AuthenticatorUtils.parseResponse(null, authorization1, null),
                null, null));
        List<ChallengeRequest> creq = AuthenticatorUtils.parseRequest(null,
                authenticate1, null);
        assertEquals(creq.size(), 1);
        assertEquals(authenticate1,
                AuthenticatorUtils.formatRequest(creq.get(0), null, null));
    }

    /**
     * Tests the authentication parsing for HTTP DIGEST.
     * 
     * @throws IOException
     */
    public void testParsingDigest() throws IOException {
        ChallengeResponse cres1 = new ChallengeResponse(
                ChallengeScheme.HTTP_DIGEST,
                null,
                "admin",
                "12345".toCharArray(),
                Digest.ALGORITHM_NONE,
                null,
                "qop",
                new Reference("/protected/asdass"),
                null,
                null,
                "MTE3NzEwMzIwMjkwMDoxNmMzODFiYzRjNWRjMmMyOTVkMWFhNDdkMTQ4OGFlMw==",
                "MTE3NzEwMzIwMjkwMDoxNmMzODFiYzRjNWRjMmMyOTVkMWFhNDdkMTQ4OGFlMw==",
                1, 0L);

        Request request = new Request(Method.GET,
                "http://remote.com/protected/asdass");
        String authorization1 = AuthenticatorUtils.formatResponse(cres1,
                request, null);
        String authenticate1 = "Digest realm=realm, domain=\"/protected/ /alsoProtected/\", qop=auth, algorithm=MD5, nonce=\"MTE3NzEwMzIwMjg0Mjo2NzFjODQyMjAyOWRlNWQ1YjFjNmEzYzJmOWRlZmE2Mw==\"";

        ChallengeResponse cres = AuthenticatorUtils.parseResponse(null,
                authorization1, null);
        cres.setRawValue(null);
        assertEquals(authorization1,
                AuthenticatorUtils.formatResponse(cres, request, null));

        List<ChallengeRequest> creq = AuthenticatorUtils.parseRequest(null,
                authenticate1, null);
        assertEquals(creq.size(), 1);
        assertEquals(authenticate1,
                AuthenticatorUtils.formatRequest(creq.get(0), null, null));
    }

    /**
     * Tests the authentication parsing for HTTP DIGEST.
     * 
     * @throws IOException
     */
    public void testParsingMultiValuedAuthenticate() throws IOException {
        String authenticate0 = "Basic realm=\"Restlet tutorial\"";
        String authenticate1 = "Digest realm=realm, domain=\"/protected/ /alsoProtected/\", qop=auth, algorithm=MD5, nonce=\"MTE3NzEwMzIwMjg0Mjo2NzFjODQyMjAyOWRlNWQ1YjFjNmEzYzJmOWRlZmE2Mw==\"";
        String authenticate = authenticate0 + "," + authenticate1;

        List<ChallengeRequest> creq = AuthenticatorUtils.parseRequest(null,
                authenticate, null);
        assertEquals(creq.size(), 2);
        assertEquals(authenticate0,
                AuthenticatorUtils.formatRequest(creq.get(0), null, null));
        assertEquals(authenticate1,
                AuthenticatorUtils.formatRequest(creq.get(1), null, null));

    }
}