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/*
* Copyright (c) 2018, 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
* @bug 8055206
* @summary Check that each module loaded by the platform loader has the
* proper "accessClassInPackage" RuntimePermissions to access its
* qualified exports.
* @run main CheckAccessClassInPackagePermissions
*/
import java.lang.module.ModuleDescriptor;
import java.lang.module.ModuleDescriptor.Exports;
import java.net.URL;
import java.security.CodeSigner;
import java.security.CodeSource;
import java.security.Policy;
import java.security.ProtectionDomain;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Optional;
import java.util.Set;
import java.util.stream.Collectors;
import java.util.stream.Stream;
public class CheckAccessClassInPackagePermissions {
public static void main(String[] args) throws Exception {
// Get the modules in the boot layer loaded by the boot or platform
// loader
ModuleLayer bootLayer = ModuleLayer.boot();
Set<Module> modules = bootLayer.modules()
.stream()
.filter(CheckAccessClassInPackagePermissions::isBootOrPlatformMod)
.collect(Collectors.toSet());
// Create map of target module's qualified export packages
Map<String, List<String>> map = new HashMap<>();
Set<Exports> qualExports =
modules.stream()
.map(Module::getDescriptor)
.map(ModuleDescriptor::exports)
.flatMap(Set::stream)
.filter(Exports::isQualified)
.collect(Collectors.toSet());
for (Exports e : qualExports) {
Set<String> targets = e.targets();
for (String t : targets) {
map.compute(t, (k, ov) -> {
if (ov == null) {
List<String> v = new ArrayList<>();
v.add(e.source());
return v;
} else {
ov.add(e.source());
return ov;
}
});
}
}
// Check if each target module has the right permissions to access
// its qualified exports
Policy policy = Policy.getPolicy();
for (Map.Entry<String, List<String>> me : map.entrySet()) {
String moduleName = me.getKey();
// is this a module loaded by the platform loader?
Optional<Module> module = bootLayer.findModule(moduleName);
if (!module.isPresent()) {
continue;
}
Module mod = module.get();
if (mod.getClassLoader() != ClassLoader.getPlatformClassLoader()) {
continue;
}
// create ProtectionDomain simulating module
URL url = new URL("jrt:/" + moduleName);
CodeSource cs = new CodeSource(url, (CodeSigner[])null);
ProtectionDomain pd = new ProtectionDomain(cs, null, null, null);
List<String> pkgs = me.getValue();
for (String p : pkgs) {
RuntimePermission rp =
new RuntimePermission("accessClassInPackage." + p);
if (!policy.implies(pd, rp)) {
throw new Exception("Module " + mod + " has not been " +
"granted " + rp);
}
}
}
}
/**
* Returns true if the module's loader is the boot or platform loader.
*/
private static boolean isBootOrPlatformMod(Module m) {
return m.getClassLoader() == null ||
m.getClassLoader() == ClassLoader.getPlatformClassLoader();
}
}
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