| /* |
| * Copyright (c) 2017, 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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. |
| */ |
| |
| package com.sun.xml.internal.ws.util; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Proxy; |
| import java.security.AccessController; |
| import java.security.AllPermission; |
| import java.security.CodeSource; |
| import java.security.PermissionCollection; |
| import java.security.PrivilegedExceptionAction; |
| import java.security.SecureClassLoader; |
| import java.util.Arrays; |
| |
| /* |
| * This copies from sun.reflect.misc.MethodUtil to implement the trampoline |
| * code such that when a Method is invoked, it will be called through |
| * the trampoline that is defined by this MethodUtil class loader. |
| */ |
| class Trampoline { |
| static { |
| if (Trampoline.class.getClassLoader() == null) { |
| throw new Error( |
| "Trampoline must not be defined by the bootstrap classloader"); |
| } |
| } |
| |
| private static void ensureInvocableMethod(Method m) |
| throws InvocationTargetException { |
| Class<?> clazz = m.getDeclaringClass(); |
| if (clazz.equals(AccessController.class) || |
| clazz.equals(Method.class) || |
| clazz.getName().startsWith("java.lang.invoke.")) |
| throw new InvocationTargetException( |
| new UnsupportedOperationException("invocation not supported")); |
| } |
| |
| private static Object invoke(Method m, Object obj, Object[] params) |
| throws InvocationTargetException, IllegalAccessException { |
| ensureInvocableMethod(m); |
| return m.invoke(obj, params); |
| } |
| } |
| |
| /* |
| * Create a trampoline class. |
| */ |
| public final class MethodUtil extends SecureClassLoader { |
| private static final String WS_UTIL_PKG = "com.sun.xml.internal.ws.util."; |
| private static final String TRAMPOLINE = WS_UTIL_PKG + "Trampoline"; |
| private static final Method bounce = getTrampoline(); |
| private static final int DEFAULT_BUFFER_SIZE = 8192; |
| private static final int MAX_BUFFER_SIZE = Integer.MAX_VALUE - 8; |
| |
| |
| private MethodUtil() { |
| super(); |
| } |
| |
| /* |
| * Bounce through the trampoline. |
| */ |
| public static Object invoke(Method m, Object obj, Object[] params) |
| throws InvocationTargetException, IllegalAccessException { |
| try { |
| return bounce.invoke(null, m, obj, params); |
| } catch (InvocationTargetException ie) { |
| Throwable t = ie.getCause(); |
| |
| if (t instanceof InvocationTargetException) { |
| throw (InvocationTargetException) t; |
| } else if (t instanceof IllegalAccessException) { |
| throw (IllegalAccessException) t; |
| } else if (t instanceof RuntimeException) { |
| throw (RuntimeException) t; |
| } else if (t instanceof Error) { |
| throw (Error) t; |
| } else { |
| throw new Error("Unexpected invocation error", t); |
| } |
| } catch (IllegalAccessException iae) { |
| // this can't happen |
| throw new Error("Unexpected invocation error", iae); |
| } |
| } |
| |
| private static Method getTrampoline() { |
| try { |
| return AccessController.doPrivileged( |
| new PrivilegedExceptionAction<Method>() { |
| public Method run() throws Exception { |
| Class<?> t = getTrampolineClass(); |
| Method b = t.getDeclaredMethod("invoke", |
| Method.class, Object.class, Object[].class); |
| b.setAccessible(true); |
| return b; |
| } |
| }); |
| } catch (Exception e) { |
| throw new InternalError("bouncer cannot be found", e); |
| } |
| } |
| |
| |
| protected synchronized Class<?> loadClass(String name, boolean resolve) |
| throws ClassNotFoundException { |
| // First, check if the class has already been loaded |
| checkPackageAccess(name); |
| Class<?> c = findLoadedClass(name); |
| if (c == null) { |
| try { |
| c = findClass(name); |
| } catch (ClassNotFoundException e) { |
| // Fall through ... |
| } |
| if (c == null) { |
| c = getParent().loadClass(name); |
| } |
| } |
| if (resolve) { |
| resolveClass(c); |
| } |
| return c; |
| } |
| |
| |
| protected Class<?> findClass(final String name) |
| throws ClassNotFoundException { |
| if (!name.startsWith(WS_UTIL_PKG)) { |
| throw new ClassNotFoundException(name); |
| } |
| String path = "/".concat(name.replace('.', '/').concat(".class")); |
| try (InputStream in = MethodUtil.class.getResourceAsStream(path)) { |
| byte[] b = readAllBytes(in); |
| return defineClass(name, b); |
| } catch (IOException e) { |
| throw new ClassNotFoundException(name, e); |
| } |
| } |
| |
| /** |
| * JDK9 {@link InputStream#readAllBytes()} substitution. |
| */ |
| private byte[] readAllBytes(InputStream in) throws IOException { |
| byte[] buf = new byte[DEFAULT_BUFFER_SIZE]; |
| int capacity = buf.length; |
| int nread = 0; |
| int n; |
| for (; ; ) { |
| // read to EOF which may read more or less than initial buffer size |
| while ((n = in.read(buf, nread, capacity - nread)) > 0) |
| nread += n; |
| |
| // if the last call to read returned -1, then we're done |
| if (n < 0) |
| break; |
| |
| // need to allocate a larger buffer |
| if (capacity <= MAX_BUFFER_SIZE - capacity) { |
| capacity = capacity << 1; |
| } else { |
| if (capacity == MAX_BUFFER_SIZE) |
| throw new OutOfMemoryError("Required array size too large"); |
| capacity = MAX_BUFFER_SIZE; |
| } |
| buf = Arrays.copyOf(buf, capacity); |
| } |
| return (capacity == nread) ? buf : Arrays.copyOf(buf, nread); |
| } |
| |
| |
| /* |
| * Define the proxy classes |
| */ |
| private Class<?> defineClass(String name, byte[] b) throws IOException { |
| CodeSource cs = new CodeSource(null, (java.security.cert.Certificate[]) null); |
| if (!name.equals(TRAMPOLINE)) { |
| throw new IOException("MethodUtil: bad name " + name); |
| } |
| return defineClass(name, b, 0, b.length, cs); |
| } |
| |
| protected PermissionCollection getPermissions(CodeSource codesource) { |
| PermissionCollection perms = super.getPermissions(codesource); |
| perms.add(new AllPermission()); |
| return perms; |
| } |
| |
| private static Class<?> getTrampolineClass() { |
| try { |
| return Class.forName(TRAMPOLINE, true, new MethodUtil()); |
| } catch (ClassNotFoundException e) { |
| } |
| return null; |
| } |
| |
| /** |
| * Checks package access on the given classname. |
| * This method is typically called when the Class instance is not |
| * available and the caller attempts to load a class on behalf |
| * the true caller (application). |
| */ |
| private static void checkPackageAccess(String name) { |
| SecurityManager s = System.getSecurityManager(); |
| if (s != null) { |
| String cname = name.replace('/', '.'); |
| if (cname.startsWith("[")) { |
| int b = cname.lastIndexOf('[') + 2; |
| if (b > 1 && b < cname.length()) { |
| cname = cname.substring(b); |
| } |
| } |
| int i = cname.lastIndexOf('.'); |
| if (i != -1) { |
| s.checkPackageAccess(cname.substring(0, i)); |
| } |
| } |
| } |
| |
| /** |
| * Checks package access on the given class. |
| * <p> |
| * If it is a {@link Proxy#isProxyClass(Class)} that implements |
| * a non-public interface (i.e. may be in a non-restricted package), |
| * also check the package access on the proxy interfaces. |
| */ |
| private static void checkPackageAccess(Class<?> clazz) { |
| checkPackageAccess(clazz.getName()); |
| if (isNonPublicProxyClass(clazz)) { |
| checkProxyPackageAccess(clazz); |
| } |
| } |
| |
| // Note that bytecode instrumentation tools may exclude 'sun.*' |
| // classes but not generated proxy classes and so keep it in com.sun.* |
| private static final String PROXY_PACKAGE = "com.sun.proxy"; |
| |
| /** |
| * Test if the given class is a proxy class that implements |
| * non-public interface. Such proxy class may be in a non-restricted |
| * package that bypasses checkPackageAccess. |
| */ |
| private static boolean isNonPublicProxyClass(Class<?> cls) { |
| String name = cls.getName(); |
| int i = name.lastIndexOf('.'); |
| String pkg = (i != -1) ? name.substring(0, i) : ""; |
| return Proxy.isProxyClass(cls) && !pkg.startsWith(PROXY_PACKAGE); |
| } |
| |
| /** |
| * Check package access on the proxy interfaces that the given proxy class |
| * implements. |
| * |
| * @param clazz Proxy class object |
| */ |
| private static void checkProxyPackageAccess(Class<?> clazz) { |
| SecurityManager s = System.getSecurityManager(); |
| if (s != null) { |
| // check proxy interfaces if the given class is a proxy class |
| if (Proxy.isProxyClass(clazz)) { |
| for (Class<?> intf : clazz.getInterfaces()) { |
| checkPackageAccess(intf); |
| } |
| } |
| } |
| } |
| } |