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8343150: Change URLClassLoader.getPermissions to return empty PermissionCollection

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Reviewed-by: dfuchs, alanb, michaelm
This commit is contained in:
Jaikiran Pai 2024-11-23 07:26:04 +00:00
parent effee122dd
commit d00f31156a
1 changed files with 9 additions and 82 deletions
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91
src/java.base/share/classes/java/net/URLClassLoader.java
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@ -26,13 +26,11 @@
package java.net;
import java.io.Closeable;
import java.io.File;
import java.io.FilePermission;
import java.io.IOException;
import java.io.InputStream;
import java.security.CodeSigner;
import java.security.CodeSource;
import java.security.Permission;
import java.security.Permissions;
import java.security.PermissionCollection;
import java.security.SecureClassLoader;
import java.util.Enumeration;
@ -50,8 +48,6 @@ import jdk.internal.loader.Resource;
import jdk.internal.loader.URLClassPath;
import jdk.internal.access.SharedSecrets;
import jdk.internal.perf.PerfCounter;
import sun.net.www.ParseUtil;
import sun.security.util.SecurityConstants;
/**
* This class loader is used to load classes and resources from a search
@ -573,84 +569,15 @@ public class URLClassLoader extends SecureClassLoader implements Closeable {
}
/**
* Returns the permissions for the given codesource object.
* The implementation of this method first calls super.getPermissions
* and then adds permissions based on the URL of the codesource.
* <p>
* If the protocol of this URL is "jar", then the permission returned
* is based on the permission that is required by the URL of the Jar
* file.
* <p>
* If the protocol is "file" and there is an authority component, then
* permission to connect to and accept connections from that authority
* may be returned. If the protocol is "file"
* and the path specifies a file, then permission to read that
* file is returned. If protocol is "file" and the path is
* a directory, then permission is returned to read all files
* and (recursively) all files and subdirectories contained in
* that directory.
* <p>
* If the protocol is not "file", then permission
* to connect to and accept connections from the URL's host is returned.
* @param codesource the codesource
* @throws NullPointerException if {@code codesource} is {@code null}.
* @return the permissions for the codesource
* {@return an {@linkplain PermissionCollection empty Permission collection}}
*
* @param codesource the {@code CodeSource}
* @throws NullPointerException if {@code codesource} is {@code null}.
*/
protected PermissionCollection getPermissions(CodeSource codesource)
{
PermissionCollection perms = super.getPermissions(codesource);
URL url = codesource.getLocation();
Permission p;
URLConnection urlConnection;
try {
urlConnection = url.openConnection();
p = urlConnection.getPermission();
} catch (java.io.IOException ioe) {
p = null;
urlConnection = null;
}
if (p instanceof FilePermission) {
// if the permission has a separator char on the end,
// it means the codebase is a directory, and we need
// to add an additional permission to read recursively
String path = p.getName();
if (path.endsWith(File.separator)) {
path += "-";
p = new FilePermission(path, SecurityConstants.FILE_READ_ACTION);
}
} else if ((p == null) && (url.getProtocol().equals("file"))) {
String path = url.getFile().replace('/', File.separatorChar);
path = ParseUtil.decode(path);
if (path.endsWith(File.separator))
path += "-";
p = new FilePermission(path, SecurityConstants.FILE_READ_ACTION);
} else {
/**
* Not loading from a 'file:' URL so we want to give the class
* permission to connect to and accept from the remote host
* after we've made sure the host is the correct one and is valid.
*/
URL locUrl = url;
if (urlConnection instanceof JarURLConnection) {
locUrl = ((JarURLConnection)urlConnection).getJarFileURL();
}
String host = locUrl.getHost();
if (host != null && !host.isEmpty())
p = new SocketPermission(host,
SecurityConstants.SOCKET_CONNECT_ACCEPT_ACTION);
}
// make sure the person that created this class loader
// would have this permission
if (p != null) {
perms.add(p);
}
return perms;
@Override
protected PermissionCollection getPermissions(CodeSource codesource) {
Objects.requireNonNull(codesource);
return new Permissions();
}
/**