124 lines
4.9 KiB
Java
124 lines
4.9 KiB
Java
/*
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* Copyright (c) 2006, 2013, 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.
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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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/**
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* @test
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* @bug 4879507
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* @summary ZipInputStream does not check CRC for stored (uncompressed) files
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* @author Dave Bristor
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*/
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import java.io.*;
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import java.util.Arrays;
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import java.util.zip.*;
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public class StoredCRC {
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public static void realMain(String[] args) throws Throwable {
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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ZipOutputStream zos = new ZipOutputStream(baos);
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ZipEntry ze = new ZipEntry("test");
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ze.setMethod(ZipOutputStream.STORED);
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String writtenString = "hello, world";
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byte[] writtenData = writtenString.getBytes("ASCII");
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ze.setSize(writtenData.length);
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CRC32 crc = new CRC32();
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crc.update(writtenData);
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ze.setCrc(crc.getValue());
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zos.putNextEntry(ze);
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zos.write(writtenData, 0, writtenData.length);
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zos.close();
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byte[] data = baos.toByteArray();
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// Run with an arg to create a test file that can be used to figure
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// out what position in the data stream can be changed.
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if (args.length > 0) {
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FileOutputStream fos = new FileOutputStream("stored.zip");
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fos.write(data, 0, data.length);
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fos.close();
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} else {
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// Test that reading byte-at-a-time works
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ZipInputStream zis = new ZipInputStream(
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new ByteArrayInputStream(data));
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ze = zis.getNextEntry();
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int pos = 0;
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byte[] readData = new byte[256];
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try {
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int count = zis.read(readData, pos, 1);
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while (count > 0) {
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count = zis.read(readData, ++pos, 1);
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}
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check(writtenString.equals(new String(readData, 0, pos, "ASCII")));
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} catch (Throwable t) {
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unexpected(t);
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}
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// Test that data corruption is detected. "offset" was
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// determined to be in the entry's uncompressed data.
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data[getDataOffset(data) + 4] ^= 1;
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zis = new ZipInputStream(
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new ByteArrayInputStream(data));
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ze = zis.getNextEntry();
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try {
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zis.read(readData, 0, readData.length);
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fail("Did not catch expected ZipException" );
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} catch (ZipException ex) {
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String msg = ex.getMessage();
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check(msg != null && msg.startsWith("invalid entry CRC (expected 0x"));
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} catch (Throwable t) {
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unexpected(t);
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}
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}
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}
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public static final int getDataOffset(byte b[]) {
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final int LOCHDR = 30; // LOC header size
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final int LOCEXT = 28; // extra field length
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final int LOCNAM = 26; // filename length
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int lenExt = Byte.toUnsignedInt(b[LOCEXT]) | (Byte.toUnsignedInt(b[LOCEXT + 1]) << 8);
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int lenNam = Byte.toUnsignedInt(b[LOCNAM]) | (Byte.toUnsignedInt(b[LOCNAM + 1]) << 8);
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return LOCHDR + lenExt + lenNam;
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}
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//--------------------- Infrastructure ---------------------------
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static volatile int passed = 0, failed = 0;
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static boolean pass() {passed++; return true;}
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static boolean fail() {failed++; Thread.dumpStack(); return false;}
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static boolean fail(String msg) {System.out.println(msg); return fail();}
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static void unexpected(Throwable t) {failed++; t.printStackTrace();}
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static boolean check(boolean cond) {if (cond) pass(); else fail(); return cond;}
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static boolean equal(Object x, Object y) {
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if (x == null ? y == null : x.equals(y)) return pass();
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else return fail(x + " not equal to " + y);}
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public static void main(String[] args) throws Throwable {
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try {realMain(args);} catch (Throwable t) {unexpected(t);}
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System.out.println("\nPassed = " + passed + " failed = " + failed);
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if (failed > 0) throw new AssertionError("Some tests failed");}
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}
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