| /** |
| * 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.kerby.kerberos.tool.token; |
| |
| |
| import org.apache.commons.io.output.FileWriterWithEncoding; |
| import org.apache.kerby.kerberos.kerb.KrbException; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.BufferedReader; |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStreamReader; |
| import java.io.Writer; |
| import java.nio.charset.StandardCharsets; |
| import java.nio.file.Files; |
| |
| public class TokenCache { |
| private static final Logger LOG = LoggerFactory.getLogger(TokenCache.class); |
| private static final String DEFAULT_TOKEN_CACHE_PATH = ".tokenauth"; |
| private static final String TOKEN_CACHE_FILE = ".tokenauth.token"; |
| |
| public static String readToken(String tokenCacheFile) { |
| File cacheFile; |
| |
| if (tokenCacheFile != null && !tokenCacheFile.isEmpty()) { |
| cacheFile = new File(tokenCacheFile); |
| if (!cacheFile.exists()) { |
| throw new RuntimeException("Invalid token cache specified: " + tokenCacheFile); |
| } |
| } else { |
| cacheFile = getDefaultTokenCache(); |
| if (!cacheFile.exists()) { |
| throw new RuntimeException("No token cache available by default"); |
| } |
| } |
| |
| try (BufferedReader reader = new BufferedReader( |
| new InputStreamReader(Files.newInputStream(cacheFile.toPath()), StandardCharsets.UTF_8))) { |
| |
| return reader.readLine(); |
| } catch (IOException e) { |
| LOG.error("Can't find the cache file. " + e); |
| return null; |
| } |
| } |
| |
| public static void writeToken(String token) throws KrbException { |
| File cacheFile = getDefaultTokenCache(); |
| |
| Writer writer = null; |
| try { |
| writer = new FileWriterWithEncoding(cacheFile, StandardCharsets.UTF_8); |
| writer.write(token); |
| writer.flush(); |
| |
| // sets read-write permissions to owner only |
| cacheFile.setReadable(false, false); |
| cacheFile.setReadable(true, true); |
| if (!cacheFile.setWritable(true, true)) { |
| throw new KrbException("Cache file is not readable."); |
| } |
| } catch (IOException ioe) { |
| // if case of any error we just delete the cache, if user-only |
| // write permissions are not properly set a security exception |
| // is thrown and the file will be deleted. |
| if (cacheFile.delete()) { |
| System.err.println("Cache file is deleted."); |
| } |
| } finally { |
| if (writer != null) { |
| try { |
| writer.close(); |
| } catch (IOException e) { |
| throw new KrbException(e.getMessage()); |
| } |
| } |
| } |
| } |
| |
| public static File getDefaultTokenCache() { |
| String homeDir = System.getProperty("user.home", DEFAULT_TOKEN_CACHE_PATH); |
| return new File(homeDir, TOKEN_CACHE_FILE); |
| } |
| } |