/*
 * Copyright 2016 Red Hat, Inc. and/or its affiliates
 * and other contributors as indicated by the @author tags.
 *
 * Licensed 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.keycloak;

import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.junit.Assert;
import org.junit.Test;
import org.keycloak.crypto.Algorithm;
import org.keycloak.jose.jws.crypto.HashUtils;

import java.security.Security;

/**
 * See "at_hash" in OIDC specification
 *
 * @author <a href="mailto:mposolda@redhat.com">Marek Posolda</a>
 */
public class AtHashTest {

    static {
        if (Security.getProvider("BC") == null) Security.addProvider(new BouncyCastleProvider());
    }

    @Test
    public void testAtHashRsa() throws Exception {
        verifyHash(Algorithm.RS256,"jHkWEdUXMU1BwAsC4vtUsZwnNvTIxEl0z9K3vx5KF0Y", "77QmUPtjPfzWtF2AnpK9RQ");
        verifyHash(Algorithm.RS256,"ya29.eQETFbFOkAs8nWHcmYXKwEi0Zz46NfsrUU_KuQLOLTwWS40y6Fb99aVzEXC0U14m61lcPMIr1hEIBA", "aUAkJG-u6x4RTWuILWy-CA");
    }

    @Test
    public void testAtHashEs() throws Exception {
        verifyHash(Algorithm.ES256,"jHkWEdUXMU1BwAsC4vtUsZwnNvTIxEl0z9K3vx5KF0Y", "77QmUPtjPfzWtF2AnpK9RQ");
        verifyHash(Algorithm.ES256,"ya29.eQETFbFOkAs8nWHcmYXKwEi0Zz46NfsrUU_KuQLOLTwWS40y6Fb99aVzEXC0U14m61lcPMIr1hEIBA", "aUAkJG-u6x4RTWuILWy-CA");
    }

    private void verifyHash(String jwtAlgorithm, String accessToken, String expectedAtHash) {
        String atHash = HashUtils.oidcHash(jwtAlgorithm, accessToken);
        Assert.assertEquals(expectedAtHash, atHash);
    }
}
