org.apache.hadoop.gateway.securequery.SecureQueryEncryptProcessor.java Source code

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Here is the source code for org.apache.hadoop.gateway.securequery.SecureQueryEncryptProcessor.java

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/**
 * 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.hadoop.gateway.securequery;

import org.apache.commons.codec.binary.Base64;
import org.apache.hadoop.gateway.filter.rewrite.api.UrlRewriteEnvironment;
import org.apache.hadoop.gateway.filter.rewrite.spi.UrlRewriteContext;
import org.apache.hadoop.gateway.filter.rewrite.spi.UrlRewriteStepProcessor;
import org.apache.hadoop.gateway.filter.rewrite.spi.UrlRewriteStepStatus;
import org.apache.hadoop.gateway.services.GatewayServices;
import org.apache.hadoop.gateway.services.security.CryptoService;
import org.apache.hadoop.gateway.services.security.EncryptionResult;
import org.apache.hadoop.gateway.util.urltemplate.Parser;
import org.apache.hadoop.gateway.util.urltemplate.Template;

import java.io.UnsupportedEncodingException;

public class SecureQueryEncryptProcessor implements UrlRewriteStepProcessor<SecureQueryEncryptDescriptor> {

    private static final String ENCRYPTED_PARAMETER_NAME = "_";

    private String clusterName;
    private CryptoService cryptoService = null;

    @Override
    public String getType() {
        return SecureQueryEncryptDescriptor.STEP_NAME;
    }

    @Override
    public void initialize(UrlRewriteEnvironment environment, SecureQueryEncryptDescriptor descriptor)
            throws Exception {
        clusterName = environment.getAttribute(GatewayServices.GATEWAY_CLUSTER_ATTRIBUTE);
        GatewayServices services = environment.getAttribute(GatewayServices.GATEWAY_SERVICES_ATTRIBUTE);
        cryptoService = (CryptoService) services.getService(GatewayServices.CRYPTO_SERVICE);
    }

    @Override
    public UrlRewriteStepStatus process(UrlRewriteContext context) throws Exception {
        //TODO: Need some way to get a reference to the keystore service and the encryption key in particular.
        Template url = context.getCurrentUrl();
        String str = url.toString();
        String path = str;
        String query = null;
        int index = str.indexOf('?');
        if (index >= 0) {
            path = str.substring(0, index);
            if (index < str.length()) {
                query = str.substring(index + 1);
            }
        }
        if (query != null) {
            query = encode(query);
            url = Parser.parse(path + "?" + ENCRYPTED_PARAMETER_NAME + "=" + query);
            context.setCurrentUrl(url);
        }
        return UrlRewriteStepStatus.SUCCESS;
    }

    @Override
    public void destroy() {
    }

    private String encode(String string) throws UnsupportedEncodingException {
        EncryptionResult result = cryptoService.encryptForCluster(clusterName, "encryptQueryString",
                string.getBytes("UTF-8"));
        string = Base64.encodeBase64URLSafeString(result.toByteAray());
        return string;
    }
}