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| 1 | /* | ||
| 2 | * Copyright (c) 2003, 2009, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package sun.security.timestamp; | ||
| 27 | |||
| 28 | import java.io.BufferedInputStream; | ||
| 29 | import java.io.DataOutputStream; | ||
| 30 | import java.io.IOException; | ||
| 31 | import java.net.URL; | ||
| 32 | import java.net.HttpURLConnection; | ||
| 33 | import java.util.Iterator; | ||
| 34 | import java.util.Set; | ||
| 35 | import java.util.Arrays; | ||
| 36 | |||
| 37 | import sun.misc.IOUtils; | ||
| 38 | import sun.security.pkcs.*; | ||
| 39 | |||
| 40 | /** | ||
| 41 | * A timestamper that communicates with a Timestamping Authority (TSA) | ||
| 42 | * over HTTP. | ||
| 43 | * It supports the Time-Stamp Protocol defined in: | ||
| 44 | * <a href="http://www.ietf.org/rfc/rfc3161.txt">RFC 3161</a>. | ||
| 45 | * | ||
| 46 | * @since 1.5 | ||
| 47 | * @author Vincent Ryan | ||
| 48 | */ | ||
| 49 | |||
| 50 | public class HttpTimestamper implements Timestamper { | ||
| 51 | |||
| 52 | private static final int CONNECT_TIMEOUT = 15000; // 15 seconds | ||
| 53 | |||
| 54 | // The MIME type for a timestamp query | ||
| 55 | private static final String TS_QUERY_MIME_TYPE = | ||
| 56 | "application/timestamp-query"; | ||
| 57 | |||
| 58 | // The MIME type for a timestamp reply | ||
| 59 | private static final String TS_REPLY_MIME_TYPE = | ||
| 60 | "application/timestamp-reply"; | ||
| 61 | |||
| 62 | private static final boolean DEBUG = false; | ||
| 63 | |||
| 64 | /* | ||
| 65 | * HTTP URL identifying the location of the TSA | ||
| 66 | */ | ||
| 67 | private String tsaUrl = null; | ||
| 68 | |||
| 69 | /** | ||
| 70 | * Creates a timestamper that connects to the specified TSA. | ||
| 71 | * | ||
| 72 | * @param tsa The location of the TSA. It must be an HTTP URL. | ||
| 73 | */ | ||
| 74 | public HttpTimestamper(String tsaUrl) { | ||
| 75 | this.tsaUrl = tsaUrl; | ||
| 76 | } | ||
| 77 | |||
| 78 | /** | ||
| 79 | * Connects to the TSA and requests a timestamp. | ||
| 80 | * | ||
| 81 | * @param tsQuery The timestamp query. | ||
| 82 | * @return The result of the timestamp query. | ||
| 83 | * @throws IOException The exception is thrown if a problem occurs while | ||
| 84 | * communicating with the TSA. | ||
| 85 | */ | ||
| 86 | public TSResponse generateTimestamp(TSRequest tsQuery) throws IOException { | ||
| 87 | |||
| 88 | HttpURLConnection connection = | ||
| 89 | (HttpURLConnection) new URL(tsaUrl).openConnection(); | ||
| 90 | connection.setDoOutput(true); | ||
| 91 | connection.setUseCaches(false); // ignore cache | ||
| 92 | connection.setRequestProperty("Content-Type", TS_QUERY_MIME_TYPE); | ||
| 93 | connection.setRequestMethod("POST"); | ||
| 94 | // Avoids the "hang" when a proxy is required but none has been set. | ||
| 95 | connection.setConnectTimeout(CONNECT_TIMEOUT); | ||
| 96 | |||
| 97 | if (DEBUG) { | ||
| 98 | Set headers = connection.getRequestProperties().entrySet(); | ||
| 99 | System.out.println(connection.getRequestMethod() + " " + tsaUrl + | ||
| 100 | " HTTP/1.1"); | ||
| 101 | for (Iterator i = headers.iterator(); i.hasNext(); ) { | ||
| 102 | System.out.println(" " + i.next()); | ||
| 103 | } | ||
| 104 | System.out.println(); | ||
| 105 | } | ||
| 106 | connection.connect(); // No HTTP authentication is performed | ||
| 107 | |||
| 108 | // Send the request | ||
| 109 | DataOutputStream output = null; | ||
| 110 | try { | ||
| 111 | output = new DataOutputStream(connection.getOutputStream()); | ||
| 112 | byte[] request = tsQuery.encode(); | ||
| 113 | output.write(request, 0, request.length); | ||
| 114 | output.flush(); | ||
| 115 | if (DEBUG) { | ||
| 116 | System.out.println("sent timestamp query (length=" + | ||
| 117 | request.length + ")"); | ||
| 118 | } | ||
| 119 | } finally { | ||
| 120 | if (output != null) { | ||
| 121 | output.close(); | ||
| 122 | } | ||
| 123 | } | ||
| 124 | |||
| 125 | // Receive the reply | ||
| 126 | BufferedInputStream input = null; | ||
| 127 | byte[] replyBuffer = null; | ||
| 128 | try { | ||
| 129 | input = new BufferedInputStream(connection.getInputStream()); | ||
| 130 | if (DEBUG) { | ||
| 131 | String header = connection.getHeaderField(0); | ||
| 132 | System.out.println(header); | ||
| 133 | int i = 1; | ||
| 134 | while ((header = connection.getHeaderField(i)) != null) { | ||
| 135 | String key = connection.getHeaderFieldKey(i); | ||
| 136 | System.out.println(" " + ((key==null) ? "" : key + ": ") + | ||
| 137 | header); | ||
| 138 | i++; | ||
| 139 | } | ||
| 140 | System.out.println(); | ||
| 141 | } | ||
| 142 | verifyMimeType(connection.getContentType()); | ||
| 143 | |||
| 144 | int total = 0; | ||
| 145 | int contentLength = connection.getContentLength(); | ||
| 146 | replyBuffer = IOUtils.readFully(input, contentLength, false); | ||
| 147 | |||
| 148 | if (DEBUG) { | ||
| 149 | System.out.println("received timestamp response (length=" + | ||
| 150 | total + ")"); | ||
| 151 | } | ||
| 152 | } finally { | ||
| 153 | if (input != null) { | ||
| 154 | input.close(); | ||
| 155 | } | ||
| 156 | } | ||
| 157 | return new TSResponse(replyBuffer); | ||
| 158 | } | ||
| 159 | |||
| 160 | /* | ||
| 161 | * Checks that the MIME content type is a timestamp reply. | ||
| 162 | * | ||
| 163 | * @param contentType The MIME content type to be checked. | ||
| 164 | * @throws IOException The exception is thrown if a mismatch occurs. | ||
| 165 | */ | ||
| 166 | private static void verifyMimeType(String contentType) throws IOException { | ||
| 167 | if (! TS_REPLY_MIME_TYPE.equalsIgnoreCase(contentType)) { | ||
| 168 | throw new IOException("MIME Content-Type is not " + | ||
| 169 | TS_REPLY_MIME_TYPE); | ||
| 170 | } | ||
| 171 | } | ||
| 172 | } | ||