From e754ccedb4bac408959b84c80780a203647182d5 Mon Sep 17 00:00:00 2001 From: zgu Date: Tue, 17 Dec 2019 03:10:22 +0000 Subject: [PATCH] 8216401: Allow "file:" URLs in Class-Path of local JARs Reviewed-by: phh, andrew --- src/share/classes/sun/misc/URLClassPath.java | 97 ++++++++++++----- .../URLClassPath/JarClassPathFileEntry.java | 103 ++++++++++++++++++ 2 files changed, 173 insertions(+), 27 deletions(-) create mode 100644 test/sun/misc/URLClassPath/JarClassPathFileEntry.java diff --git a/src/share/classes/sun/misc/URLClassPath.java b/src/share/classes/sun/misc/URLClassPath.java index 6e035105d..8d7593f26 100644 --- a/src/share/classes/sun/misc/URLClassPath.java +++ b/src/share/classes/sun/misc/URLClassPath.java @@ -1,5 +1,5 @@ /* - * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 1997, 2019, 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 @@ -1229,10 +1229,15 @@ public class URLClassPath { int i = 0; while (st.hasMoreTokens()) { String path = st.nextToken(); - URL url = DISABLE_CP_URL_CHECK ? new URL(base, path) : safeResolve(base, path); + URL url = DISABLE_CP_URL_CHECK ? new URL(base, path) : tryResolve(base, path); if (url != null) { urls[i] = url; i++; + } else { + if (DEBUG_CP_URL_CHECK) { + System.err.println("Class-Path entry: \"" + path + + "\" ignored in JAR file " + base); + } } } if (i == 0) { @@ -1244,36 +1249,74 @@ public class URLClassPath { return urls; } - /* - * Return a URL for the given path resolved against the base URL, or - * null if the resulting URL is invalid. + static URL tryResolve(URL base, String input) throws MalformedURLException { + if ("file".equalsIgnoreCase(base.getProtocol())) { + return tryResolveFile(base, input); + } else { + return tryResolveNonFile(base, input); + } + } + + /** + * Attempt to return a file URL by resolving input against a base file + * URL. The input is an absolute or relative file URL that encodes a + * file path. + * + * @apiNote Nonsensical input such as a Windows file path with a drive + * letter cannot be disambiguated from an absolute URL so will be rejected + * (by returning null) by this method. + * + * @return the resolved URL or null if the input is an absolute URL with + * a scheme other than file (ignoring case) + * @throws MalformedURLException */ - static URL safeResolve(URL base, String path) { - String child = path.replace(File.separatorChar, '/'); - try { - if (!URI.create(child).isAbsolute()) { - URL url = new URL(base, child); - if (base.getProtocol().equalsIgnoreCase("file")) { - return url; - } else { - String bp = base.getPath(); - String urlp = url.getPath(); - int pos = bp.lastIndexOf('/'); - if (pos == -1) { - pos = bp.length() - 1; - } - if (urlp.regionMatches(0, bp, 0, pos + 1) - && urlp.indexOf("..", pos) == -1) { - return url; - } - } + static URL tryResolveFile(URL base, String input) throws MalformedURLException { + int index = input.indexOf(':'); + boolean isFile; + if (index >= 0) { + String scheme = input.substring(0, index); + isFile = "file".equalsIgnoreCase(scheme); + } else { + isFile = true; + } + return (isFile) ? new URL(base, input) : null; + } + + /** + * Attempt to return a URL by resolving input against a base URL. Returns + * null if the resolved URL is not contained by the base URL. + * + * @return the resolved URL or null + * @throws MalformedURLException + */ + static URL tryResolveNonFile(URL base, String input) throws MalformedURLException { + String child = input.replace(File.separatorChar, '/'); + if (isRelative(child)) { + URL url = new URL(base, child); + String bp = base.getPath(); + String urlp = url.getPath(); + int pos = bp.lastIndexOf('/'); + if (pos == -1) { + pos = bp.length() - 1; + } + if (urlp.regionMatches(0, bp, 0, pos + 1) + && urlp.indexOf("..", pos) == -1) { + return url; } - } catch (MalformedURLException | IllegalArgumentException e) {} - if (DEBUG_CP_URL_CHECK) { - System.err.println("Class-Path entry: \"" + path + "\" ignored in JAR file " + base); } return null; } + + /** + * Returns true if the given input is a relative URI. + */ + static boolean isRelative(String child) { + try { + return !URI.create(child).isAbsolute(); + } catch (IllegalArgumentException e) { + return false; + } + } } /* diff --git a/test/sun/misc/URLClassPath/JarClassPathFileEntry.java b/test/sun/misc/URLClassPath/JarClassPathFileEntry.java new file mode 100644 index 000000000..6f57ec514 --- /dev/null +++ b/test/sun/misc/URLClassPath/JarClassPathFileEntry.java @@ -0,0 +1,103 @@ +/* + * Copyright (c) 2019, 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. + */ + +import java.io.File; +import java.net.URL; +import java.net.URLClassLoader; +import java.nio.file.Path; +import java.nio.file.Paths; +import java.util.jar.Attributes; +import java.util.jar.Manifest; +import jdk.testlibrary.InMemoryJavaCompiler; +import jdk.testlibrary.JarUtils; + +/* + * @test + * @bug 8216401 + * @summary Test loading of JAR Class-Path entry with file: scheme + * @library /lib/testlibrary + * + * @run main/othervm JarClassPathFileEntry + * @run main/othervm -Djdk.net.URLClassPath.disableClassPathURLCheck=true JarClassPathFileEntry + * @run main/othervm -Djdk.net.URLClassPath.disableClassPathURLCheck=false JarClassPathFileEntry + */ + +public class JarClassPathFileEntry { + private final static boolean IS_WINDOWS = System.getProperty("os.name").startsWith("Windows"); + + private final static String TEST_CLASSES = System.getProperty("test.classes"); + private final static String OTHER_DIR = TEST_CLASSES + "/OTHER/"; + + private final static Path OTHER_JAR_PATH = Paths.get(OTHER_DIR, "Other.jar"); + private final static Path CONTEXT_JAR_PATH = Paths.get(TEST_CLASSES, "Context.jar"); + + public static void main(String[] args) throws Throwable { + // Create Other.class in OTHER_DIR, off the default classpath + byte klassbuf[] = InMemoryJavaCompiler.compile("Other", + "public class Other {}"); + ClassFileInstaller.writeClassToDisk("Other", klassbuf, OTHER_DIR); + + // Create Other.jar in OTHER_DIR + JarUtils.createJarFile(OTHER_JAR_PATH, + Paths.get(OTHER_DIR), + Paths.get(OTHER_DIR, "Other.class")); + + // Create Context.class + klassbuf = InMemoryJavaCompiler.compile("Context", + "public class Context {}"); + ClassFileInstaller.writeClassToDisk("Context", klassbuf, TEST_CLASSES); + + // Create Context.jar w/ "file:" entry for Other.jar + Manifest mf = new Manifest(); + Attributes attrs = mf.getMainAttributes(); + attrs.put(Attributes.Name.MANIFEST_VERSION, "1.0"); + + String classPathEntry = "file:" + (IS_WINDOWS ? toUnixPath(OTHER_JAR_PATH.toString()) + : OTHER_JAR_PATH.toString()); + attrs.put(Attributes.Name.CLASS_PATH, classPathEntry); + + System.out.println("Creating Context.jar with Class-Path: " + classPathEntry); + JarUtils.createJarFile(CONTEXT_JAR_PATH, mf, + Paths.get(TEST_CLASSES), + Paths.get(TEST_CLASSES, "Context.class")); + + // Use URLClassLoader w/ Context.jar to load Other.class, which will + // load via the Class-Path entry + URL url = CONTEXT_JAR_PATH.toUri().toURL(); + URLClassLoader ucl = new URLClassLoader(new URL[]{ url }, + null); // don't delegate to App CL + Class otherClass = Class.forName("Other", true, ucl); // ClassNotFoundException -> fail + System.out.println("Loaded: " + otherClass); + } + + /* Convert a Windows path to a unix-style path, and remove any drive letter */ + private static String toUnixPath(String orig) { + String retVal = new File(orig).toURI().getPath(); + int colonAt = retVal.indexOf(':'); + + if (colonAt != -1 && colonAt < 3) { + retVal = retVal.substring(colonAt + 1); // Start after the drive letter + } + return retVal; + } +} -- GitLab