572 lines
19 KiB
Java
572 lines
19 KiB
Java
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/*
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* Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package java.util.jar;
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import static java.nio.charset.StandardCharsets.UTF_8;
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import java.io.DataOutputStream;
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import java.io.FilterInputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.util.HashMap;
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import java.util.Map;
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import sun.security.util.SecurityProperties;
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/**
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* The Manifest class is used to maintain Manifest entry names and their
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* associated Attributes. There are main Manifest Attributes as well as
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* per-entry Attributes. For information on the Manifest format, please
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* see the
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* <a href="{@docRoot}/../specs/jar/jar.html">
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* Manifest format specification</a>.
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*
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* @author David Connelly
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* @see Attributes
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* @since 1.2
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*/
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public class Manifest implements Cloneable {
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// manifest main attributes
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private final Attributes attr = new Attributes();
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// manifest entries
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private final Map<String, Attributes> entries = new HashMap<>();
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// associated JarVerifier, not null when called by JarFile::getManifest.
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private final JarVerifier jv;
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/**
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* Constructs a new, empty Manifest.
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*/
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public Manifest() {
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jv = null;
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}
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/**
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* Constructs a new Manifest from the specified input stream.
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*
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* @param is the input stream containing manifest data
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* @throws IOException if an I/O error has occurred
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*/
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public Manifest(InputStream is) throws IOException {
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this(null, is, null);
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}
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/**
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* Constructs a new Manifest from the specified input stream.
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*
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* @param is the input stream containing manifest data
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* @param jarFilename the name of the corresponding jar archive if available
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* @throws IOException if an I/O error has occurred
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*/
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Manifest(InputStream is, String jarFilename) throws IOException {
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this(null, is, jarFilename);
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}
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/**
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* Constructs a new Manifest from the specified input stream
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* and associates it with a JarVerifier.
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*
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* @param jv the JarVerifier to use
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* @param is the input stream containing manifest data
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* @param jarFilename the name of the corresponding jar archive if available
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* @throws IOException if an I/O error has occurred
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*/
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Manifest(JarVerifier jv, InputStream is, String jarFilename) throws IOException {
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read(is, jarFilename);
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this.jv = jv;
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}
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/**
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* Constructs a new Manifest that is a copy of the specified Manifest.
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*
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* @param man the Manifest to copy
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*/
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public Manifest(Manifest man) {
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attr.putAll(man.getMainAttributes());
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entries.putAll(man.getEntries());
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jv = man.jv;
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}
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/**
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* Returns the main Attributes for the Manifest.
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* @return the main Attributes for the Manifest
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*/
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public Attributes getMainAttributes() {
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return attr;
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}
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/**
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* Returns a Map of the entries contained in this Manifest. Each entry
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* is represented by a String name (key) and associated Attributes (value).
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* The Map permits the {@code null} key, but no entry with a null key is
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* created by {@link #read}, nor is such an entry written by using {@link
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* #write}.
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*
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* @return a Map of the entries contained in this Manifest
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*/
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public Map<String,Attributes> getEntries() {
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return entries;
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}
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/**
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* Returns the Attributes for the specified entry name.
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* This method is defined as:
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* <pre>
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* return (Attributes)getEntries().get(name)
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* </pre>
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* Though {@code null} is a valid {@code name}, when
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* {@code getAttributes(null)} is invoked on a {@code Manifest}
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* obtained from a jar file, {@code null} will be returned. While jar
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* files themselves do not allow {@code null}-named attributes, it is
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* possible to invoke {@link #getEntries} on a {@code Manifest}, and
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* on that result, invoke {@code put} with a null key and an
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* arbitrary value. Subsequent invocations of
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* {@code getAttributes(null)} will return the just-{@code put}
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* value.
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* <p>
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* Note that this method does not return the manifest's main attributes;
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* see {@link #getMainAttributes}.
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*
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* @param name entry name
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* @return the Attributes for the specified entry name
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*/
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public Attributes getAttributes(String name) {
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return getEntries().get(name);
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}
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/**
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* Returns the Attributes for the specified entry name, if trusted.
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*
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* @param name entry name
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* @return returns the same result as {@link #getAttributes(String)}
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* @throws SecurityException if the associated jar is signed but this entry
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* has been modified after signing (i.e. the section in the manifest
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* does not exist in SF files of all signers).
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*/
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Attributes getTrustedAttributes(String name) {
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// Note: Before the verification of MANIFEST.MF/.SF/.RSA files is done,
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// jv.isTrustedManifestEntry() isn't able to detect MANIFEST.MF change.
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// Users of this method should call SharedSecrets.javaUtilJarAccess()
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// .ensureInitialization() first.
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Attributes result = getAttributes(name);
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if (result != null && jv != null && ! jv.isTrustedManifestEntry(name)) {
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throw new SecurityException("Untrusted manifest entry: " + name);
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}
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return result;
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}
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/**
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* Clears the main Attributes as well as the entries in this Manifest.
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*/
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public void clear() {
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attr.clear();
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entries.clear();
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}
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/**
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* Writes the Manifest to the specified OutputStream.
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* Attributes.Name.MANIFEST_VERSION must be set in
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* MainAttributes prior to invoking this method.
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*
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* @param out the output stream
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* @throws IOException if an I/O error has occurred
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* @see #getMainAttributes
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*/
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public void write(OutputStream out) throws IOException {
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DataOutputStream dos = new DataOutputStream(out);
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// Write out the main attributes for the manifest
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attr.writeMain(dos);
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// Now write out the per-entry attributes
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StringBuilder buffer = entries.isEmpty() ? null : new StringBuilder(72);
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for (Map.Entry<String, Attributes> e : entries.entrySet()) {
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buffer.setLength(0);
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buffer.append("Name: ");
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buffer.append(e.getKey());
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println72(dos, buffer.toString());
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e.getValue().write(dos);
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}
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dos.flush();
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}
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/**
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* Adds line breaks to enforce a maximum of 72 bytes per line.
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*
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* @deprecation Replaced with {@link #println72}.
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*/
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@Deprecated(since = "13")
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static void make72Safe(StringBuffer line) {
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int length = line.length();
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int index = 72;
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while (index < length) {
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line.insert(index, "\r\n ");
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index += 74; // + line width + line break ("\r\n")
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length += 3; // + line break ("\r\n") and space
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}
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}
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/**
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* Writes {@code line} to {@code out} with line breaks and continuation
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* spaces within the limits of 72 bytes of contents per line followed
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* by a line break.
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*/
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static void println72(OutputStream out, String line) throws IOException {
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if (!line.isEmpty()) {
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byte[] lineBytes = line.getBytes(UTF_8);
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int length = lineBytes.length;
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// first line can hold one byte more than subsequent lines which
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// start with a continuation line break space
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out.write(lineBytes[0]);
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int pos = 1;
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while (length - pos > 71) {
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out.write(lineBytes, pos, 71);
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pos += 71;
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println(out);
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out.write(' ');
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}
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out.write(lineBytes, pos, length - pos);
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}
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println(out);
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}
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/**
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* Writes a line break to {@code out}.
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*/
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static void println(OutputStream out) throws IOException {
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out.write('\r');
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out.write('\n');
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}
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static String getErrorPosition(String filename, final int lineNumber) {
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if (filename == null ||
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!SecurityProperties.INCLUDE_JAR_NAME_IN_EXCEPTIONS) {
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return "line " + lineNumber;
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}
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return "manifest of " + filename + ":" + lineNumber;
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}
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/**
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* Reads the Manifest from the specified InputStream. The entry
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* names and attributes read will be merged in with the current
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* manifest entries.
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*
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* @param is the input stream
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* @throws IOException if an I/O error has occurred
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*/
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public void read(InputStream is) throws IOException {
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read(is, null);
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}
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private void read(InputStream is, String jarFilename) throws IOException {
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// Buffered input stream for reading manifest data
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FastInputStream fis = new FastInputStream(is);
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// Line buffer
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byte[] lbuf = new byte[512];
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// Read the main attributes for the manifest
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int lineNumber = attr.read(fis, lbuf, jarFilename, 0);
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// Total number of entries, attributes read
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int ecount = 0, acount = 0;
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// Average size of entry attributes
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int asize = 2;
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// Now parse the manifest entries
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int len;
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String name = null;
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boolean skipEmptyLines = true;
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byte[] lastline = null;
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while ((len = fis.readLine(lbuf)) != -1) {
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byte c = lbuf[--len];
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lineNumber++;
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if (c != '\n' && c != '\r') {
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throw new IOException("manifest line too long ("
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+ getErrorPosition(jarFilename, lineNumber) + ")");
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}
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if (len > 0 && lbuf[len-1] == '\r') {
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--len;
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}
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if (len == 0 && skipEmptyLines) {
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continue;
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}
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skipEmptyLines = false;
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if (name == null) {
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name = parseName(lbuf, len);
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if (name == null) {
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throw new IOException("invalid manifest format ("
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+ getErrorPosition(jarFilename, lineNumber) + ")");
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}
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if (fis.peek() == ' ') {
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// name is wrapped
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lastline = new byte[len - 6];
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System.arraycopy(lbuf, 6, lastline, 0, len - 6);
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continue;
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}
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} else {
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// continuation line
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byte[] buf = new byte[lastline.length + len - 1];
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System.arraycopy(lastline, 0, buf, 0, lastline.length);
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System.arraycopy(lbuf, 1, buf, lastline.length, len - 1);
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if (fis.peek() == ' ') {
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// name is wrapped
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lastline = buf;
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continue;
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}
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name = new String(buf, 0, buf.length, UTF_8);
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lastline = null;
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}
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Attributes attr = getAttributes(name);
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if (attr == null) {
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attr = new Attributes(asize);
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entries.put(name, attr);
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}
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lineNumber = attr.read(fis, lbuf, jarFilename, lineNumber);
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ecount++;
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acount += attr.size();
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//XXX: Fix for when the average is 0. When it is 0,
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// you get an Attributes object with an initial
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// capacity of 0, which tickles a bug in HashMap.
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asize = Math.max(2, acount / ecount);
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name = null;
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skipEmptyLines = true;
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}
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}
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private String parseName(byte[] lbuf, int len) {
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if (toLower(lbuf[0]) == 'n' && toLower(lbuf[1]) == 'a' &&
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toLower(lbuf[2]) == 'm' && toLower(lbuf[3]) == 'e' &&
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lbuf[4] == ':' && lbuf[5] == ' ') {
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return new String(lbuf, 6, len - 6, UTF_8);
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}
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return null;
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}
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private int toLower(int c) {
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return (c >= 'A' && c <= 'Z') ? 'a' + (c - 'A') : c;
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}
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/**
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* Returns true if the specified Object is also a Manifest and has
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* the same main Attributes and entries.
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*
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* @param o the object to be compared
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* @return true if the specified Object is also a Manifest and has
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* the same main Attributes and entries
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*/
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public boolean equals(Object o) {
|
||
|
|
// TODO(b/248243024) Revert this.
|
||
|
|
/*
|
||
|
|
return o instanceof Manifest m
|
||
|
|
&& attr.equals(m.getMainAttributes())
|
||
|
|
&& entries.equals(m.getEntries());
|
||
|
|
*/
|
||
|
|
if (o instanceof Manifest) {
|
||
|
|
Manifest other = (Manifest) o;
|
||
|
|
|
||
|
|
return attr.equals(other.getMainAttributes())
|
||
|
|
&& entries.equals(other.getEntries());
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns the hash code for this Manifest.
|
||
|
|
*/
|
||
|
|
public int hashCode() {
|
||
|
|
return attr.hashCode() + entries.hashCode();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns a shallow copy of this Manifest. The shallow copy is
|
||
|
|
* implemented as follows:
|
||
|
|
* <pre>
|
||
|
|
* public Object clone() { return new Manifest(this); }
|
||
|
|
* </pre>
|
||
|
|
* @return a shallow copy of this Manifest
|
||
|
|
*/
|
||
|
|
public Object clone() {
|
||
|
|
return new Manifest(this);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* A fast buffered input stream for parsing manifest files.
|
||
|
|
*/
|
||
|
|
static class FastInputStream extends FilterInputStream {
|
||
|
|
private byte buf[];
|
||
|
|
private int count = 0;
|
||
|
|
private int pos = 0;
|
||
|
|
|
||
|
|
FastInputStream(InputStream in) {
|
||
|
|
this(in, 8192);
|
||
|
|
}
|
||
|
|
|
||
|
|
FastInputStream(InputStream in, int size) {
|
||
|
|
super(in);
|
||
|
|
buf = new byte[size];
|
||
|
|
}
|
||
|
|
|
||
|
|
public int read() throws IOException {
|
||
|
|
if (pos >= count) {
|
||
|
|
fill();
|
||
|
|
if (pos >= count) {
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return Byte.toUnsignedInt(buf[pos++]);
|
||
|
|
}
|
||
|
|
|
||
|
|
public int read(byte[] b, int off, int len) throws IOException {
|
||
|
|
int avail = count - pos;
|
||
|
|
if (avail <= 0) {
|
||
|
|
if (len >= buf.length) {
|
||
|
|
return in.read(b, off, len);
|
||
|
|
}
|
||
|
|
fill();
|
||
|
|
avail = count - pos;
|
||
|
|
if (avail <= 0) {
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (len > avail) {
|
||
|
|
len = avail;
|
||
|
|
}
|
||
|
|
System.arraycopy(buf, pos, b, off, len);
|
||
|
|
pos += len;
|
||
|
|
return len;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Reads 'len' bytes from the input stream, or until an end-of-line
|
||
|
|
* is reached. Returns the number of bytes read.
|
||
|
|
*/
|
||
|
|
public int readLine(byte[] b, int off, int len) throws IOException {
|
||
|
|
byte[] tbuf = this.buf;
|
||
|
|
int total = 0;
|
||
|
|
while (total < len) {
|
||
|
|
int avail = count - pos;
|
||
|
|
if (avail <= 0) {
|
||
|
|
fill();
|
||
|
|
avail = count - pos;
|
||
|
|
if (avail <= 0) {
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
int n = len - total;
|
||
|
|
if (n > avail) {
|
||
|
|
n = avail;
|
||
|
|
}
|
||
|
|
int tpos = pos;
|
||
|
|
int maxpos = tpos + n;
|
||
|
|
byte c = 0;
|
||
|
|
// jar.spec.newline: CRLF | LF | CR (not followed by LF)
|
||
|
|
while (tpos < maxpos && (c = tbuf[tpos++]) != '\n' && c != '\r');
|
||
|
|
if (c == '\r' && tpos < maxpos && tbuf[tpos] == '\n') {
|
||
|
|
tpos++;
|
||
|
|
}
|
||
|
|
n = tpos - pos;
|
||
|
|
System.arraycopy(tbuf, pos, b, off, n);
|
||
|
|
off += n;
|
||
|
|
total += n;
|
||
|
|
pos = tpos;
|
||
|
|
c = tbuf[tpos-1];
|
||
|
|
if (c == '\n') {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
if (c == '\r') {
|
||
|
|
if (count == pos) {
|
||
|
|
// try to see if there is a trailing LF
|
||
|
|
fill();
|
||
|
|
if (pos < count && tbuf[pos] == '\n') {
|
||
|
|
if (total < len) {
|
||
|
|
b[off++] = '\n';
|
||
|
|
total++;
|
||
|
|
} else {
|
||
|
|
// we should always have big enough lbuf but
|
||
|
|
// just in case we don't, replace the last CR
|
||
|
|
// with LF.
|
||
|
|
b[off - 1] = '\n';
|
||
|
|
}
|
||
|
|
pos++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return total;
|
||
|
|
}
|
||
|
|
|
||
|
|
public byte peek() throws IOException {
|
||
|
|
if (pos == count)
|
||
|
|
fill();
|
||
|
|
if (pos == count)
|
||
|
|
return -1; // nothing left in buffer
|
||
|
|
return buf[pos];
|
||
|
|
}
|
||
|
|
|
||
|
|
public int readLine(byte[] b) throws IOException {
|
||
|
|
return readLine(b, 0, b.length);
|
||
|
|
}
|
||
|
|
|
||
|
|
public long skip(long n) throws IOException {
|
||
|
|
if (n <= 0) {
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
long avail = count - pos;
|
||
|
|
if (avail <= 0) {
|
||
|
|
return in.skip(n);
|
||
|
|
}
|
||
|
|
if (n > avail) {
|
||
|
|
n = avail;
|
||
|
|
}
|
||
|
|
pos += n;
|
||
|
|
return n;
|
||
|
|
}
|
||
|
|
|
||
|
|
public int available() throws IOException {
|
||
|
|
return (count - pos) + in.available();
|
||
|
|
}
|
||
|
|
|
||
|
|
public void close() throws IOException {
|
||
|
|
if (in != null) {
|
||
|
|
in.close();
|
||
|
|
in = null;
|
||
|
|
buf = null;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
private void fill() throws IOException {
|
||
|
|
count = pos = 0;
|
||
|
|
int n = in.read(buf, 0, buf.length);
|
||
|
|
if (n > 0) {
|
||
|
|
count = n;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|