| /* |
| * 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.knox.gateway.securequery; |
| |
| import org.apache.commons.codec.binary.Base64; |
| import org.apache.knox.gateway.config.GatewayConfig; |
| import org.apache.knox.gateway.filter.rewrite.api.UrlRewriteEnvironment; |
| import org.apache.knox.gateway.filter.rewrite.spi.UrlRewriteContext; |
| import org.apache.knox.gateway.filter.rewrite.spi.UrlRewriteStepProcessor; |
| import org.apache.knox.gateway.filter.rewrite.spi.UrlRewriteStepStatus; |
| import org.apache.knox.gateway.i18n.messages.MessagesFactory; |
| import org.apache.knox.gateway.services.security.EncryptionResult; |
| import org.apache.knox.gateway.services.security.impl.ConfigurableEncryptor; |
| import org.apache.knox.gateway.util.urltemplate.Parser; |
| import org.apache.knox.gateway.util.urltemplate.Template; |
| |
| public class SecureQueryEncryptProcessor |
| implements UrlRewriteStepProcessor<SecureQueryEncryptDescriptor> { |
| |
| private static SecureQueryMessages log = MessagesFactory.get( SecureQueryMessages.class ); |
| private static final String ENCRYPTED_PARAMETER_NAME = "_"; |
| |
| private ConfigurableEncryptor encryptor; |
| |
| @Override |
| public String getType() { |
| return SecureQueryEncryptDescriptor.STEP_NAME; |
| } |
| |
| @Override |
| public void initialize( UrlRewriteEnvironment environment, SecureQueryEncryptDescriptor descriptor ) throws Exception { |
| encryptor = new ConfigurableEncryptor("encryptQueryString"); |
| encryptor.init(environment.getAttribute(GatewayConfig.GATEWAY_CONFIG_ATTRIBUTE)); |
| } |
| |
| @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.parseLiteral( path + "?" + ENCRYPTED_PARAMETER_NAME +"=" + query ); |
| context.setCurrentUrl( url ); |
| } |
| return UrlRewriteStepStatus.SUCCESS; |
| } |
| |
| @Override |
| public void destroy() { |
| } |
| |
| private String encode( String string ) throws Exception { |
| try { |
| EncryptionResult result = encryptor.encrypt(string); |
| return Base64.encodeBase64URLSafeString(result.toByteAray()); |
| } catch (Exception e) { |
| log.unableToEncryptValue(e); |
| throw e; |
| } |
| } |
| } |