| /* |
| * 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.accumulo.core.rpc; |
| |
| import javax.security.auth.callback.CallbackHandler; |
| |
| import org.apache.commons.codec.binary.Base64; |
| import org.apache.hadoop.security.token.SecretManager; |
| import org.apache.hadoop.security.token.SecretManager.InvalidToken; |
| import org.apache.hadoop.security.token.TokenIdentifier; |
| |
| /** |
| * Common serialization methods across the client and server callback handlers for SASL. Serialization and deserialization methods must be kept in sync. |
| */ |
| public abstract class SaslDigestCallbackHandler implements CallbackHandler { |
| |
| /** |
| * Encode the serialized {@link TokenIdentifier} into a {@link String}. |
| * |
| * @param identifier |
| * The serialized identifier |
| * @see #decodeIdentifier(String) |
| */ |
| public String encodeIdentifier(byte[] identifier) { |
| return new String(Base64.encodeBase64(identifier)); |
| } |
| |
| /** |
| * Encode the token password into a character array. |
| * |
| * @param password |
| * The token password |
| * @see #getPassword(SecretManager, TokenIdentifier) |
| */ |
| public char[] encodePassword(byte[] password) { |
| return new String(Base64.encodeBase64(password)).toCharArray(); |
| } |
| |
| /** |
| * Generate the password from the provided {@link SecretManager} and {@link TokenIdentifier}. |
| * |
| * @param secretManager |
| * The server SecretManager |
| * @param tokenid |
| * The TokenIdentifier from the client |
| * @see #encodePassword(byte[]) |
| */ |
| public <T extends TokenIdentifier> char[] getPassword(SecretManager<T> secretManager, T tokenid) throws InvalidToken { |
| return encodePassword(secretManager.retrievePassword(tokenid)); |
| } |
| |
| /** |
| * Decode the encoded {@link TokenIdentifier} into bytes suitable to reconstitute the identifier. |
| * |
| * @param identifier |
| * The encoded, serialized {@link TokenIdentifier} |
| * @see #encodeIdentifier(byte[]) |
| */ |
| public byte[] decodeIdentifier(String identifier) { |
| return Base64.decodeBase64(identifier.getBytes()); |
| } |
| |
| } |