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/*
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* Copyright 1997-2005 Sun Microsystems, Inc. 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. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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package java.util.jar;
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import java.io.*;
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import java.util.*;
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import java.util.zip.*;
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import java.security.*;
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import java.security.cert.CertificateException;
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import sun.security.util.ManifestDigester;
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import sun.security.util.ManifestEntryVerifier;
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import sun.security.util.SignatureFileVerifier;
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import sun.security.util.Debug;
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/**
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*
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* @author Roland Schemers
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*/
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class JarVerifier {
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/* Are we debugging ? */
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static final Debug debug = Debug.getInstance("jar");
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/* a table mapping names to code signers, for jar entries that have
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had their actual hashes verified */
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private Hashtable verifiedSigners;
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/* a table mapping names to code signers, for jar entries that have
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passed the .SF/.DSA -> MANIFEST check */
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private Hashtable sigFileSigners;
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/* a hash table to hold .SF bytes */
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private Hashtable sigFileData;
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/** "queue" of pending PKCS7 blocks that we couldn't parse
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* until we parsed the .SF file */
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private ArrayList pendingBlocks;
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/* cache of CodeSigner objects */
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private ArrayList signerCache;
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/* Are we parsing a block? */
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private boolean parsingBlockOrSF = false;
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/* Are we done parsing META-INF entries? */
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private boolean parsingMeta = true;
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/* Are there are files to verify? */
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private boolean anyToVerify = true;
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/* The output stream to use when keeping track of files we are interested
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in */
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private ByteArrayOutputStream baos;
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/** The ManifestDigester object */
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private ManifestDigester manDig;
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/** the bytes for the manDig object */
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byte manifestRawBytes[] = null;
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public JarVerifier(byte rawBytes[]) {
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manifestRawBytes = rawBytes;
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sigFileSigners = new Hashtable();
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verifiedSigners = new Hashtable();
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sigFileData = new Hashtable(11);
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pendingBlocks = new ArrayList();
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baos = new ByteArrayOutputStream();
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}
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/**
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* This method scans to see which entry we're parsing and
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* keeps various state information depending on what type of
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* file is being parsed.
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*/
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public void beginEntry(JarEntry je, ManifestEntryVerifier mev)
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throws IOException
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{
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if (je == null)
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return;
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if (debug != null) {
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debug.println("beginEntry "+je.getName());
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}
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String name = je.getName();
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/*
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* Assumptions:
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* 1. The manifest should be the first entry in the META-INF directory.
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* 2. The .SF/.DSA files follow the manifest, before any normal entries
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* 3. Any of the following will throw a SecurityException:
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* a. digest mismatch between a manifest section and
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* the SF section.
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* b. digest mismatch between the actual jar entry and the manifest
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*/
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if (parsingMeta) {
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String uname = name.toUpperCase(Locale.ENGLISH);
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if ((uname.startsWith("META-INF/") ||
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uname.startsWith("/META-INF/"))) {
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if (je.isDirectory()) {
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mev.setEntry(null, je);
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return;
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}
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if (SignatureFileVerifier.isBlockOrSF(uname)) {
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/* We parse only DSA or RSA PKCS7 blocks. */
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parsingBlockOrSF = true;
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baos.reset();
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mev.setEntry(null, je);
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}
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return;
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}
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}
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if (parsingMeta) {
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doneWithMeta();
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}
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if (je.isDirectory()) {
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mev.setEntry(null, je);
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return;
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}
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// be liberal in what you accept. If the name starts with ./, remove
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// it as we internally canonicalize it with out the ./.
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if (name.startsWith("./"))
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name = name.substring(2);
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// be liberal in what you accept. If the name starts with /, remove
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// it as we internally canonicalize it with out the /.
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if (name.startsWith("/"))
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name = name.substring(1);
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// only set the jev object for entries that have a signature
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if (sigFileSigners.get(name) != null) {
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mev.setEntry(name, je);
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return;
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}
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// don't compute the digest for this entry
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mev.setEntry(null, je);
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return;
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}
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/**
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* update a single byte.
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*/
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public void update(int b, ManifestEntryVerifier mev)
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throws IOException
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{
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if (b != -1) {
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if (parsingBlockOrSF) {
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baos.write(b);
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} else {
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mev.update((byte)b);
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}
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} else {
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processEntry(mev);
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}
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}
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/**
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* update an array of bytes.
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*/
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public void update(int n, byte[] b, int off, int len,
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ManifestEntryVerifier mev)
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throws IOException
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{
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if (n != -1) {
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if (parsingBlockOrSF) {
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baos.write(b, off, n);
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} else {
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mev.update(b, off, n);
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}
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} else {
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processEntry(mev);
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}
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}
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/**
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* called when we reach the end of entry in one of the read() methods.
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*/
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private void processEntry(ManifestEntryVerifier mev)
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throws IOException
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{
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if (!parsingBlockOrSF) {
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JarEntry je = mev.getEntry();
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if ((je != null) && (je.signers == null)) {
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je.signers = mev.verify(verifiedSigners, sigFileSigners);
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je.certs = mapSignersToCertArray(je.signers);
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}
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} else {
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try {
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parsingBlockOrSF = false;
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if (debug != null) {
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debug.println("processEntry: processing block");
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}
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String uname = mev.getEntry().getName()
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.toUpperCase(Locale.ENGLISH);
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if (uname.endsWith(".SF")) {
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String key = uname.substring(0, uname.length()-3);
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byte bytes[] = baos.toByteArray();
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// add to sigFileData in case future blocks need it
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sigFileData.put(key, bytes);
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// check pending blocks, we can now process
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// anyone waiting for this .SF file
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Iterator it = pendingBlocks.iterator();
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while (it.hasNext()) {
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SignatureFileVerifier sfv =
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(SignatureFileVerifier) it.next();
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if (sfv.needSignatureFile(key)) {
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if (debug != null) {
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debug.println(
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"processEntry: processing pending block");
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}
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sfv.setSignatureFile(bytes);
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sfv.process(sigFileSigners);
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}
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}
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return;
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}
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// now we are parsing a signature block file
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String key = uname.substring(0, uname.lastIndexOf("."));
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if (signerCache == null)
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signerCache = new ArrayList();
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if (manDig == null) {
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synchronized(manifestRawBytes) {
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if (manDig == null) {
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manDig = new ManifestDigester(manifestRawBytes);
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manifestRawBytes = null;
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}
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}
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}
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SignatureFileVerifier sfv =
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new SignatureFileVerifier(signerCache,
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manDig, uname, baos.toByteArray());
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if (sfv.needSignatureFileBytes()) {
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// see if we have already parsed an external .SF file
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byte[] bytes = (byte[]) sigFileData.get(key);
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if (bytes == null) {
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// put this block on queue for later processing
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// since we don't have the .SF bytes yet
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// (uname, block);
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if (debug != null) {
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debug.println("adding pending block");
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}
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pendingBlocks.add(sfv);
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return;
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} else {
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sfv.setSignatureFile(bytes);
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}
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}
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sfv.process(sigFileSigners);
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} catch (sun.security.pkcs.ParsingException pe) {
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if (debug != null) debug.println("processEntry caught: "+pe);
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// ignore and treat as unsigned
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} catch (IOException ioe) {
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if (debug != null) debug.println("processEntry caught: "+ioe);
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// ignore and treat as unsigned
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} catch (SignatureException se) {
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if (debug != null) debug.println("processEntry caught: "+se);
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// ignore and treat as unsigned
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} catch (NoSuchAlgorithmException nsae) {
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if (debug != null) debug.println("processEntry caught: "+nsae);
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// ignore and treat as unsigned
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} catch (CertificateException ce) {
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if (debug != null) debug.println("processEntry caught: "+ce);
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// ignore and treat as unsigned
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}
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}
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}
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/**
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* Return an array of java.security.cert.Certificate objects for
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* the given file in the jar.
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*/
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public java.security.cert.Certificate[] getCerts(String name)
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{
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return mapSignersToCertArray(getCodeSigners(name));
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}
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/**
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* return an array of CodeSigner objects for
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* the given file in the jar. this array is not cloned.
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*
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*/
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public CodeSigner[] getCodeSigners(String name)
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{
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return (CodeSigner[])verifiedSigners.get(name);
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}
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/*
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* Convert an array of signers into an array of concatenated certificate
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* arrays.
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*/
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private static java.security.cert.Certificate[] mapSignersToCertArray(
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CodeSigner[] signers) {
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if (signers != null) {
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ArrayList certChains = new ArrayList();
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for (int i = 0; i < signers.length; i++) {
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certChains.addAll(
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signers[i].getSignerCertPath().getCertificates());
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}
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// Convert into a Certificate[]
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return (java.security.cert.Certificate[])
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certChains.toArray(
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new java.security.cert.Certificate[certChains.size()]);
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}
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return null;
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}
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/**
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* returns true if there no files to verify.
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* should only be called after all the META-INF entries
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* have been processed.
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*/
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boolean nothingToVerify()
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{
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return (anyToVerify == false);
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}
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/**
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* called to let us know we have processed all the
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* META-INF entries, and if we re-read one of them, don't
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* re-process it. Also gets rid of any data structures
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* we needed when parsing META-INF entries.
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*/
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void doneWithMeta()
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{
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parsingMeta = false;
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anyToVerify = !sigFileSigners.isEmpty();
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baos = null;
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sigFileData = null;
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pendingBlocks = null;
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signerCache = null;
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manDig = null;
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}
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static class VerifierStream extends java.io.InputStream {
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private InputStream is;
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private JarVerifier jv;
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private ManifestEntryVerifier mev;
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private long numLeft;
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VerifierStream(Manifest man,
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JarEntry je,
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InputStream is,
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JarVerifier jv) throws IOException
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{
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this.is = is;
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this.jv = jv;
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this.mev = new ManifestEntryVerifier(man);
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this.jv.beginEntry(je, mev);
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this.numLeft = je.getSize();
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if (this.numLeft == 0)
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this.jv.update(-1, this.mev);
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}
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public int read() throws IOException
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{
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if (numLeft > 0) {
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int b = is.read();
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jv.update(b, mev);
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numLeft--;
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if (numLeft == 0)
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jv.update(-1, mev);
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return b;
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} else {
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return -1;
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}
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}
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public int read(byte b[], int off, int len) throws IOException {
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if ((numLeft > 0) && (numLeft < len)) {
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len = (int)numLeft;
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}
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if (numLeft > 0) {
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int n = is.read(b, off, len);
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jv.update(n, b, off, len, mev);
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numLeft -= n;
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if (numLeft == 0)
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jv.update(-1, b, off, len, mev);
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return n;
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} else {
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return -1;
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}
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}
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public void close()
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throws IOException
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{
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if (is != null)
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is.close();
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is = null;
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mev = null;
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jv = null;
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}
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445 |
public int available() throws IOException {
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return is.available();
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}
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}
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}
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