| /* Utils.java -- Utility methods for JAR file signing/verification |
| Copyright (C) 2006 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package gnu.classpath.tools.jarsigner; |
| |
| import gnu.classpath.Configuration; |
| import gnu.java.security.hash.Sha160; |
| import gnu.java.security.util.Base64; |
| import gnu.java.util.jar.JarUtils; |
| |
| import java.io.BufferedInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.UnsupportedEncodingException; |
| import java.util.logging.Logger; |
| |
| /** |
| * Collection of utility methods used in JAR file signing and verification. |
| */ |
| class HashUtils |
| { |
| private static final Logger log = Logger.getLogger(HashUtils.class.getName()); |
| private Sha160 sha = new Sha160(); |
| |
| // default 0-arguments constructor |
| |
| /** |
| * @param stream the input stream to digest. |
| * @return a base-64 representation of the resulting SHA-1 digest of the |
| * contents of the designated input stream. |
| * @throws IOException if an I/O related exception occurs during the process. |
| */ |
| String hashStream(InputStream stream) throws IOException |
| { |
| BufferedInputStream bis = new BufferedInputStream(stream, 4096); |
| byte[] buffer = new byte[4096]; |
| int count = 0; |
| int n; |
| while ((n = bis.read(buffer)) != - 1) |
| if (n > 0) |
| { |
| sha.update(buffer, 0, n); |
| count += n; |
| } |
| byte[] hash = sha.digest(); |
| if (Configuration.DEBUG) |
| log.finest("Hashed " + count + " byte(s)"); |
| String result = Base64.encode(hash); |
| return result; |
| } |
| |
| /** |
| * @param ba the byte array to digest. |
| * @return a base-64 representation of the resulting SHA-1 digest of the |
| * contents of the designated buffer. |
| */ |
| String hashByteArray(byte[] ba) throws IOException |
| { |
| sha.update(ba); |
| byte[] hash = sha.digest(); |
| if (Configuration.DEBUG) |
| log.finest("Hashed " + ba.length + " byte(s)"); |
| String result = Base64.encode(hash); |
| return result; |
| } |
| |
| /** |
| * @param name the JAR entry name |
| * @param entryHash the hash of the entry file which appears in the |
| * manifest. |
| * @return the base-64 encoded form of the hash of the corresponding Manifest |
| * JAR entry which will appear in the SF file under the entry with the |
| * same name. |
| * @throws UnsupportedEncodingException If UTF-8 character encoding is not |
| * supported on this platform. |
| */ |
| String hashManifestEntry(String name, String entryHash) |
| throws UnsupportedEncodingException |
| { |
| sha.update((JarUtils.NAME + ": " + name).getBytes("UTF-8")); |
| sha.update(JarUtils.CRLF); |
| sha.update((Main.DIGEST + ": " + entryHash).getBytes("UTF-8")); |
| sha.update(JarUtils.CRLF); |
| sha.update(JarUtils.CRLF); |
| byte[] sfHash = sha.digest(); |
| String result = Base64.encode(sfHash); |
| return result; |
| } |
| } |