/*
 * Copyright 2018 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.crypto;

import org.keycloak.jose.jwe.JWEConstants;
import org.keycloak.jose.jwe.alg.JWEAlgorithmProvider;
import org.keycloak.jose.jwe.alg.RsaKeyEncryption256JWEAlgorithmProvider;
import org.keycloak.jose.jwe.alg.RsaKeyEncryptionJWEAlgorithmProvider;
import org.keycloak.models.KeycloakSession;

public class RsaCekManagementProvider implements CekManagementProvider {

    private final KeycloakSession session;
    private final String jweAlgorithmName;

    public RsaCekManagementProvider(KeycloakSession session, String jweAlgorithmName) {
        this.session = session;
        this.jweAlgorithmName = jweAlgorithmName;
    }

    @Override
    public JWEAlgorithmProvider jweAlgorithmProvider() {
        String jcaAlgorithmName = null;
        if (JWEConstants.RSA1_5.equals(jweAlgorithmName)) {
            jcaAlgorithmName = "RSA/ECB/PKCS1Padding";
        } else if (JWEConstants.RSA_OAEP.equals(jweAlgorithmName)) {
            jcaAlgorithmName = "RSA/ECB/OAEPWithSHA-1AndMGF1Padding";
        } else if (JWEConstants.RSA_OAEP_256.equals(jweAlgorithmName)) {
            return new RsaKeyEncryption256JWEAlgorithmProvider("RSA/ECB/OAEPWithSHA-256AndMGF1Padding");
        }
        return new RsaKeyEncryptionJWEAlgorithmProvider(jcaAlgorithmName);
    }

}