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/*
* Copyright (c) 2023, 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
* @modules java.base/sun.security.tools.keytool
* @summary JARs with pending block files (where .RSA comes before .SF) should verify correctly
*/
import jdk.security.jarsigner.JarSigner;
import java.io.File;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.security.KeyStore;
import java.util.Collections;
import java.util.jar.*;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipOutputStream;
public class SignedJarPendingBlock {
public static void main(String[] args) throws Exception {
Path jar = createJarFile();
Path signed = signJarFile(jar);
Path pendingBlocks = moveBlockFirst(signed);
Path invalid = invalidate(pendingBlocks);
// 1: Regular signed JAR with no pending blocks should verify
checkSigned(signed);
// 2: Signed jar with pending blocks should verify
checkSigned(pendingBlocks);
// 3: Invalid signed jar with pending blocks should throw SecurityException
try {
checkSigned(invalid);
throw new Exception("Expected invalid digest to be detected");
} catch (SecurityException se) {
// Ignore
}
}
private static void checkSigned(Path b) throws Exception {
try (JarFile jf = new JarFile(b.toFile(), true)) {
JarEntry je = jf.getJarEntry("a.txt");
try (InputStream in = jf.getInputStream(je)) {
in.transferTo(OutputStream.nullOutputStream());
}
}
}
/**
* Invalidate signed file by modifying the contents of "a.txt"
*/
private static Path invalidate(Path s) throws Exception{
Path invalid = Path.of("pending-block-file-invalidated.jar");
try (ZipFile zip = new ZipFile(s.toFile());
ZipOutputStream out = new ZipOutputStream(Files.newOutputStream(invalid))) {
for (ZipEntry ze : Collections.list(zip.entries())) {
String name = ze.getName();
out.putNextEntry(new ZipEntry(name));
if (name.equals("a.txt")) {
// Change the contents of a.txt to trigger SignatureException
out.write("b".getBytes(StandardCharsets.UTF_8));
} else {
try (InputStream in = zip.getInputStream(ze)) {
in.transferTo(out);
}
}
}
}
return invalid;
}
private static Path moveBlockFirst(Path s) throws Exception {
Path b = Path.of("pending-block-file-blockfirst.jar");
try (ZipFile in = new ZipFile(s.toFile());
ZipOutputStream out = new ZipOutputStream(Files.newOutputStream(b))) {
copy("META-INF/MANIFEST.MF", in, out);
// Switch the order of the RSA and SF files
copy("META-INF/SIGNER.RSA", in, out);
copy("META-INF/SIGNER.SF", in, out);
copy("a.txt", in, out);
}
return b;
}
/**
* Copy an entry from a ZipFile to a ZipOutputStream
*/
private static void copy(String name, ZipFile in, ZipOutputStream out) throws Exception {
out.putNextEntry(new ZipEntry(name));
try (InputStream is = in.getInputStream(in.getEntry(name))) {
is.transferTo(out);
}
}
private static Path signJarFile(Path j) throws Exception {
Path s = Path.of("pending-block-file-signed.jar");
Files.deleteIfExists(Path.of("ks"));
sun.security.tools.keytool.Main.main(
("-keystore ks -storepass changeit -keypass changeit -dname" +
" CN=SIGNER" +" -alias r -genkeypair -keyalg rsa").split(" "));
char[] pass = "changeit".toCharArray();
KeyStore ks = KeyStore.getInstance(new File("ks"), pass);
KeyStore.PrivateKeyEntry pke = (KeyStore.PrivateKeyEntry)
ks.getEntry("r", new KeyStore.PasswordProtection(pass));
JarSigner signer = new JarSigner.Builder(pke)
.digestAlgorithm("SHA-256")
.signatureAlgorithm("SHA256withRSA")
.signerName("SIGNER")
.build();
try (ZipFile in = new ZipFile(j.toFile());
OutputStream out = Files.newOutputStream(s)) {
signer.sign(in, out);
}
return s;
}
/**
* Create a jar file with single entry "a.txt" containing "a"
*/
private static Path createJarFile() throws Exception {
Path jar = Path.of("pending-block-file.jar");
Manifest manifest = new Manifest();
manifest.getMainAttributes().put(Attributes.Name.MANIFEST_VERSION, "1.0");
try (JarOutputStream out = new JarOutputStream(Files.newOutputStream(jar),manifest)) {
out.putNextEntry(new JarEntry("a.txt"));
out.write("a".getBytes(StandardCharsets.UTF_8));
}
return jar;
}
}
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