From 28f7d9d05ad70afad626d4bc54c633d31eb7430a Mon Sep 17 00:00:00 2001 From: Bryce McKinlay Date: Wed, 25 Apr 2001 16:45:15 +0100 Subject: decl.c (init_decl_processing): Add new class "protectionDomain" field. gcc/java: 2001-04-25 Bryce McKinlay * decl.c (init_decl_processing): Add new class "protectionDomain" field. * class.c (make_class_data): Set initial value for "protectionDomain". libjava: 2001-04-25 Bryce McKinlay java.security merge and ClassLoader compliance fixes. * java/lang/Class.h (Class): Include ProtectionDomain.h. New protectionDomain field. (forName): Add initialize parameter. Fixes declaration to comply with JDK spec. * java/lang/natClass.cc (forName): Correct declaration of the three-arg variant. Honour "initialize" flag. (getProtectionDomain0): New method. * java/lang/Class.java: Fix forName() declaration. (getPackage): New method based on Classpath implementation. (getProtectionDomain0): New native method decl. (getProtectionDomain): New method. * java/lang/ClassLoader.java (getParent): Now final. (definedPackages): New field. (getPackage): New. (defineClass): New variant with protectionDomain argument. (definePackage): New. (getPackages): New. (findSystemClass): Now final. (getSystemResourceAsStream): Remove redundant "final" modifier. (getSystemResource): Remove redundant "final" modifier. (getResources): Now final. (protectionDomainPermission): New static field. (unknownProtectionDomain): Ditto. (defaultProtectionDomain): Ditto. (getSystemClassLoader): Now non-native. * java/util/ResourceBundle.java (tryGetSomeBundle): Use the correct arguments for Class.forName(). * java/lang/Package.java: New file. * gnu/gcj/runtime/VMClassLoader.java (getVMClassLoader): Removed. (instance): Static initialize singleton. (findClass): Override this, not findSystemClass. * java/lang/natClassLoader.cc (defineClass0): Set class's protectionDomain field as specified. (getSystemClassLoader): Removed. (findClass): Renamed from findSystemClass. Call the interpreter via URLClassLoader.findClass if loading class via dlopen fails. * java/security/*.java: java.security import/merge with Classpath. * java/security/acl/*.java: Likewise. * java/security/interfaces/*.java: Likewise. * java/security/spec/*.java: Likewise. * java/net/NetPermission.java: Likewise. * java/net/SocketPermission.java: Likewise. * gnu/java/security/provider/DefaultPolicy.java: Likewise. * Makefile.am: Add new classes. * Makefile.in: Rebuilt. * gcj/javaprims.h: CNI namespace rebuild. From-SVN: r41543 --- libjava/java/security/AccessControlContext.java | 164 ++++++++++++++++++++++++ 1 file changed, 164 insertions(+) create mode 100644 libjava/java/security/AccessControlContext.java (limited to 'libjava/java/security/AccessControlContext.java') diff --git a/libjava/java/security/AccessControlContext.java b/libjava/java/security/AccessControlContext.java new file mode 100644 index 00000000000..5daa044462d --- /dev/null +++ b/libjava/java/security/AccessControlContext.java @@ -0,0 +1,164 @@ +/* AccessControlContext.java --- Access Control Context Class + Copyright (C) 1999 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA +02111-1307 USA. + +As a special exception, if you link this library with other files to +produce an executable, this library does not by itself cause the +resulting executable to be covered by the GNU General Public License. +This exception does not however invalidate any other reasons why the +executable file might be covered by the GNU General Public License. */ + +package java.security; + +/** + AccessControlContext makes system resource access decsion + based on permission rights. + + It is used for a specific context and has only one method + checkPermission. It is similar to AccessController except + that it makes decsions based on the current context instead + of the the current thread. + + It is created by call AccessController.getContext method. + + @author Mark Benvenuto + @since JDK 1.2 + */ +public final class AccessControlContext +{ + private ProtectionDomain protectionDomain[]; + private DomainCombiner combiner; + + /** + Construct a new AccessControlContext with the specified + ProtectionDomains. context must not be + null and duplicates will be removed. + + @param context The ProtectionDomains to use + */ + public AccessControlContext(ProtectionDomain[]context) + { + int i, j, k, count = context.length, count2 = 0; + for (i = 0, j = 0; i < count; i++) + { + for (k = 0; k < i; k++) + if (context[k] == protectionDomain[i]) + break; + if (k != i) //it means previous loop did not complete + continue; + + count2++; + } + + protectionDomain = new ProtectionDomain[count2]; + for (i = 0, j = 0; i < count2; i++) + { + for (k = 0; k < i; k++) + if (context[k] == protectionDomain[i]) + break; + if (k != i) //it means previous loop did not complete + continue; + + protectionDomain[j++] = context[i]; + } + } + + /** + Construct a new AccessControlContext with the specified + ProtectionDomains and DomainCombiner + + @param context The ProtectionDomains to use + + @since JDK 1.3 + */ + public AccessControlContext(AccessControlContext acc, + DomainCombiner combiner) + { + this(acc.protectionDomain); + this.combiner = combiner; + } + + /** + Returns the Domain Combiner associated with the AccessControlContext + + @returns the DomainCombiner + */ + public DomainCombiner getDomainCombiner() + { + return combiner; + } + + /** + Determines whether or not the specific permission is granted + depending on the context it is within. + + @param perm a permission to check + + @throws AccessControlException if the permssion is not permitted + */ + public void checkPermission(Permission perm) throws AccessControlException + { + for (int i = 0; i < protectionDomain.length; i++) + if (protectionDomain[i].implies(perm) == true) + return; + + throw new AccessControlException("Permission not granted"); + } + + /** + Checks if two AccessControlContexts are equal. + + It first checks if obj is an AccessControlContext class, and + then checks if each ProtectionDomain matches. + + @param obj The object to compare this class to + + @return true if equal, false otherwise + */ + public boolean equals(Object obj) + { + if (obj instanceof AccessControlContext) + { + AccessControlContext acc = (AccessControlContext) obj; + + if (acc.protectionDomain.length != protectionDomain.length) + return false; + + for (int i = 0; i < protectionDomain.length; i++) + if (acc.protectionDomain[i] != protectionDomain[i]) + return false; + return true; + } + return false; + } + + /** + Computes a hash code of this class + + @return a hash code representing this class + */ + public int hashCode() + { + int h = 0; + for (int i = 0; i < protectionDomain.length; i++) + h ^= protectionDomain[i].hashCode(); + + return h; + } +} -- cgit v1.2.3