/*
 * Copyright (c) 2018, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 *
 * 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.wso2.carbon.is.migration.service.v550.util;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.wso2.carbon.identity.oauth.config.OAuthServerConfiguration;
import org.wso2.carbon.identity.oauth.tokenprocessor.EncryptionDecryptionPersistenceProcessor;
import org.wso2.carbon.identity.oauth.tokenprocessor.TokenPersistenceProcessor;
import org.wso2.carbon.identity.oauth2.IdentityOAuth2Exception;

/**
 * OAuth2Util.
 */
public class OAuth2Util {

    private static final String CIPHER_TRANSFORMATION_SYSTEM_PROPERTY = "org.wso2.CipherTransformation";
    private static Logger log = LoggerFactory.getLogger(OAuth2Util.class);

    public static boolean isEncryptionWithTransformationEnabled() throws IdentityOAuth2Exception {

        String cipherTransformation = System.getProperty(CIPHER_TRANSFORMATION_SYSTEM_PROPERTY);
        return cipherTransformation != null && isTokenEncryptionEnabled();
    }

    /**
     * This method will check whether token encryption is enabled via identity.xml.
     *
     * @return whether token encryption is enabled.
     * @throws IdentityOAuth2Exception
     */
    public static boolean isTokenEncryptionEnabled() throws IdentityOAuth2Exception {

        TokenPersistenceProcessor persistenceProcessor = OAuthServerConfiguration.getInstance()
                .getPersistenceProcessor();
        return (persistenceProcessor instanceof EncryptionDecryptionPersistenceProcessor);
    }
}
