| /* |
| * Copyright (c) 2006, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /** |
| * @test |
| * @bug 4879507 |
| * @summary ZipInputStream does not check CRC for stored (uncompressed) files |
| * @author Dave Bristor |
| */ |
| |
| import java.io.*; |
| import java.util.Arrays; |
| import java.util.zip.*; |
| |
| public class StoredCRC { |
| public static void realMain(String[] args) throws Throwable { |
| |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| ZipOutputStream zos = new ZipOutputStream(baos); |
| |
| ZipEntry ze = new ZipEntry("test"); |
| ze.setMethod(ZipOutputStream.STORED); |
| |
| String writtenString = "hello, world"; |
| byte[] writtenData = writtenString.getBytes("ASCII"); |
| ze.setSize(writtenData.length); |
| CRC32 crc = new CRC32(); |
| crc.update(writtenData); |
| ze.setCrc(crc.getValue()); |
| |
| zos.putNextEntry(ze); |
| zos.write(writtenData, 0, writtenData.length); |
| zos.close(); |
| |
| byte[] data = baos.toByteArray(); |
| |
| // Run with an arg to create a test file that can be used to figure |
| // out what position in the data stream can be changed. |
| if (args.length > 0) { |
| FileOutputStream fos = new FileOutputStream("stored.zip"); |
| fos.write(data, 0, data.length); |
| fos.close(); |
| } else { |
| // Test that reading byte-at-a-time works |
| ZipInputStream zis = new ZipInputStream( |
| new ByteArrayInputStream(data)); |
| ze = zis.getNextEntry(); |
| int pos = 0; |
| byte[] readData = new byte[256]; |
| try { |
| int count = zis.read(readData, pos, 1); |
| while (count > 0) { |
| count = zis.read(readData, ++pos, 1); |
| } |
| check(writtenString.equals(new String(readData, 0, pos, "ASCII"))); |
| } catch (Throwable t) { |
| unexpected(t); |
| } |
| |
| // Test that data corruption is detected. "offset" was |
| // determined to be in the entry's uncompressed data. |
| data[getDataOffset(data) + 4] ^= 1; |
| |
| zis = new ZipInputStream( |
| new ByteArrayInputStream(data)); |
| ze = zis.getNextEntry(); |
| |
| try { |
| zis.read(readData, 0, readData.length); |
| fail("Did not catch expected ZipException" ); |
| } catch (ZipException ex) { |
| String msg = ex.getMessage(); |
| check(msg != null && msg.startsWith("invalid entry CRC (expected 0x")); |
| } catch (Throwable t) { |
| unexpected(t); |
| } |
| } |
| } |
| |
| public static final int getDataOffset(byte b[]) { |
| final int LOCHDR = 30; // LOC header size |
| final int LOCEXT = 28; // extra field length |
| final int LOCNAM = 26; // filename length |
| int lenExt = Byte.toUnsignedInt(b[LOCEXT]) | (Byte.toUnsignedInt(b[LOCEXT + 1]) << 8); |
| int lenNam = Byte.toUnsignedInt(b[LOCNAM]) | (Byte.toUnsignedInt(b[LOCNAM + 1]) << 8); |
| return LOCHDR + lenExt + lenNam; |
| } |
| |
| //--------------------- Infrastructure --------------------------- |
| static volatile int passed = 0, failed = 0; |
| static boolean pass() {passed++; return true;} |
| static boolean fail() {failed++; Thread.dumpStack(); return false;} |
| static boolean fail(String msg) {System.out.println(msg); return fail();} |
| static void unexpected(Throwable t) {failed++; t.printStackTrace();} |
| static boolean check(boolean cond) {if (cond) pass(); else fail(); return cond;} |
| static boolean equal(Object x, Object y) { |
| if (x == null ? y == null : x.equals(y)) return pass(); |
| else return fail(x + " not equal to " + y);} |
| public static void main(String[] args) throws Throwable { |
| try {realMain(args);} catch (Throwable t) {unexpected(t);} |
| System.out.println("\nPassed = " + passed + " failed = " + failed); |
| if (failed > 0) throw new AssertionError("Some tests failed");} |
| } |