/**
* 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.encrypturi.impl;
import java.io.UnsupportedEncodingException;
import java.util.Arrays;
import org.apache.commons.codec.binary.Base64;
import org.apache.hadoop.gateway.encrypturi.EncryptStepContextParams;
import org.apache.hadoop.gateway.encrypturi.api.EncryptUriDescriptor;
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.Expander;
import org.apache.hadoop.gateway.util.urltemplate.Parser;
import org.apache.hadoop.gateway.util.urltemplate.Template;
public class EncryptUriProcessor
implements UrlRewriteStepProcessor<EncryptUriDescriptor> {
private String clusterName;
private CryptoService cryptoService;
private String template;
private String param;
@Override
public String getType() {
return EncryptUriDescriptor.STEP_NAME;
}
@Override
public void initialize( UrlRewriteEnvironment environment, EncryptUriDescriptor 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);
template = descriptor.getTemplate();
param = descriptor.getParam();
}
@Override
public UrlRewriteStepStatus process( UrlRewriteContext context ) throws Exception {
if( param != null && !param.isEmpty() && template != null && !template.isEmpty() ) {
Template uri = Parser.parse( template );
String resolvedTemplate = Expander.expandToString( uri, context.getParameters(), context.getEvaluator() );
if( resolvedTemplate != null && !resolvedTemplate.isEmpty() ) {
String endcoedUrl = encode( resolvedTemplate );
EncryptStepContextParams params = new EncryptStepContextParams();
params.addParam( param, Arrays.asList( endcoedUrl ) );
context.addParameters( params );
return UrlRewriteStepStatus.SUCCESS;
}
}
return UrlRewriteStepStatus.FAILURE;
}
@Override
public void destroy() {
}
private String encode( String string ) throws UnsupportedEncodingException {
EncryptionResult result = cryptoService.encryptForCluster(clusterName, EncryptUriDescriptor.PASSWORD_ALIAS, string.getBytes("UTF-8"));
string = Base64.encodeBase64URLSafeString(result.toByteAray());
return string;
}
}