| /* |
| * Copyright (c) 1998, 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 javax.security.auth; |
| |
| import java.security.Security; |
| import java.security.AccessController; |
| import java.security.PrivilegedAction; |
| import java.security.PrivilegedExceptionAction; |
| import java.util.Objects; |
| import sun.security.util.Debug; |
| |
| /** |
| * <p> This is an abstract class for representing the system policy for |
| * Subject-based authorization. A subclass implementation |
| * of this class provides a means to specify a Subject-based |
| * access control {@code Policy}. |
| * |
| * <p> A {@code Policy} object can be queried for the set of |
| * Permissions granted to code running as a |
| * {@code Principal} in the following manner: |
| * |
| * <pre> |
| * policy = Policy.getPolicy(); |
| * PermissionCollection perms = policy.getPermissions(subject, |
| * codeSource); |
| * </pre> |
| * |
| * The {@code Policy} object consults the local policy and returns |
| * and appropriate {@code Permissions} object with the |
| * Permissions granted to the Principals associated with the |
| * provided {@code subject}, and granted to the code specified |
| * by the provided {@code codeSource}. |
| * |
| * <p> A {@code Policy} contains the following information. |
| * Note that this example only represents the syntax for the default |
| * {@code Policy} implementation. Subclass implementations of this class |
| * may implement alternative syntaxes and may retrieve the |
| * {@code Policy} from any source such as files, databases, |
| * or servers. |
| * |
| * <p> Each entry in the {@code Policy} is represented as |
| * a <b><i>grant</i></b> entry. Each <b><i>grant</i></b> entry |
| * specifies a codebase, code signers, and Principals triplet, |
| * as well as the Permissions granted to that triplet. |
| * |
| * <pre> |
| * grant CodeBase ["URL"], Signedby ["signers"], |
| * Principal [Principal_Class] "Principal_Name" { |
| * Permission Permission_Class ["Target_Name"] |
| * [, "Permission_Actions"] |
| * [, signedBy "SignerName"]; |
| * }; |
| * </pre> |
| * |
| * The CodeBase and Signedby components of the triplet name/value pairs |
| * are optional. If they are not present, then any codebase will match, |
| * and any signer (including unsigned code) will match. |
| * For Example, |
| * |
| * <pre> |
| * grant CodeBase "foo.com", Signedby "foo", |
| * Principal com.sun.security.auth.SolarisPrincipal "duke" { |
| * permission java.io.FilePermission "/home/duke", "read, write"; |
| * }; |
| * </pre> |
| * |
| * This <b><i>grant</i></b> entry specifies that code from "foo.com", |
| * signed by "foo', and running as a {@code SolarisPrincipal} with the |
| * name, duke, has one {@code Permission}. This {@code Permission} |
| * permits the executing code to read and write files in the directory, |
| * "/home/duke". |
| * |
| * <p> To "run" as a particular {@code Principal}, |
| * code invokes the {@code Subject.doAs(subject, ...)} method. |
| * After invoking that method, the code runs as all the Principals |
| * associated with the specified {@code Subject}. |
| * Note that this {@code Policy} (and the Permissions |
| * granted in this {@code Policy}) only become effective |
| * after the call to {@code Subject.doAs} has occurred. |
| * |
| * <p> Multiple Principals may be listed within one <b><i>grant</i></b> entry. |
| * All the Principals in the grant entry must be associated with |
| * the {@code Subject} provided to {@code Subject.doAs} |
| * for that {@code Subject} to be granted the specified Permissions. |
| * |
| * <pre> |
| * grant Principal com.sun.security.auth.SolarisPrincipal "duke", |
| * Principal com.sun.security.auth.SolarisNumericUserPrincipal "0" { |
| * permission java.io.FilePermission "/home/duke", "read, write"; |
| * permission java.net.SocketPermission "duke.com", "connect"; |
| * }; |
| * </pre> |
| * |
| * This entry grants any code running as both "duke" and "0" |
| * permission to read and write files in duke's home directory, |
| * as well as permission to make socket connections to "duke.com". |
| * |
| * <p> Note that non Principal-based grant entries are not permitted |
| * in this {@code Policy}. Therefore, grant entries such as: |
| * |
| * <pre> |
| * grant CodeBase "foo.com", Signedby "foo" { |
| * permission java.io.FilePermission "/tmp/scratch", "read, write"; |
| * }; |
| * </pre> |
| * |
| * are rejected. Such permission must be listed in the |
| * {@code java.security.Policy}. |
| * |
| * <p> The default {@code Policy} implementation can be changed by |
| * setting the value of the {@code auth.policy.provider} security property to |
| * the fully qualified name of the desired {@code Policy} implementation class. |
| * |
| * @deprecated as of JDK version 1.4 -- Replaced by java.security.Policy. |
| * java.security.Policy has a method: |
| * <pre> |
| * public PermissionCollection getPermissions |
| * (java.security.ProtectionDomain pd) |
| * |
| * </pre> |
| * and ProtectionDomain has a constructor: |
| * <pre> |
| * public ProtectionDomain |
| * (CodeSource cs, |
| * PermissionCollection permissions, |
| * ClassLoader loader, |
| * Principal[] principals) |
| * </pre> |
| * |
| * These two APIs provide callers the means to query the |
| * Policy for Principal-based Permission entries. |
| * |
| * @see java.security.Security security properties |
| */ |
| @Deprecated(since="1.4") |
| public abstract class Policy { |
| |
| private static Policy policy; |
| private static final String AUTH_POLICY = |
| "sun.security.provider.AuthPolicyFile"; |
| |
| private final java.security.AccessControlContext acc = |
| java.security.AccessController.getContext(); |
| |
| // true if a custom (not AUTH_POLICY) system-wide policy object is set |
| private static boolean isCustomPolicy; |
| |
| /** |
| * Sole constructor. (For invocation by subclass constructors, typically |
| * implicit.) |
| */ |
| protected Policy() { } |
| |
| /** |
| * Returns the installed Policy object. |
| * This method first calls |
| * {@code SecurityManager.checkPermission} with the |
| * {@code AuthPermission("getPolicy")} permission |
| * to ensure the caller has permission to get the Policy object. |
| * |
| * @return the installed Policy. The return value cannot be |
| * {@code null}. |
| * |
| * @exception java.lang.SecurityException if the current thread does not |
| * have permission to get the Policy object. |
| * |
| * @see #setPolicy |
| */ |
| public static Policy getPolicy() { |
| java.lang.SecurityManager sm = System.getSecurityManager(); |
| if (sm != null) sm.checkPermission(new AuthPermission("getPolicy")); |
| return getPolicyNoCheck(); |
| } |
| |
| /** |
| * Returns the installed Policy object, skipping the security check. |
| * |
| * @return the installed Policy. |
| * |
| */ |
| static Policy getPolicyNoCheck() { |
| if (policy == null) { |
| |
| synchronized(Policy.class) { |
| |
| if (policy == null) { |
| String policy_class = null; |
| policy_class = AccessController.doPrivileged |
| (new PrivilegedAction<String>() { |
| public String run() { |
| return java.security.Security.getProperty |
| ("auth.policy.provider"); |
| } |
| }); |
| if (policy_class == null) { |
| policy_class = AUTH_POLICY; |
| } |
| |
| try { |
| final String finalClass = policy_class; |
| |
| Policy untrustedImpl = AccessController.doPrivileged( |
| new PrivilegedExceptionAction<Policy>() { |
| public Policy run() throws ClassNotFoundException, |
| InstantiationException, |
| IllegalAccessException { |
| Class<? extends Policy> implClass = Class.forName( |
| finalClass, false, |
| Thread.currentThread().getContextClassLoader() |
| ).asSubclass(Policy.class); |
| return implClass.newInstance(); |
| } |
| }); |
| AccessController.doPrivileged( |
| new PrivilegedExceptionAction<Void>() { |
| public Void run() { |
| setPolicy(untrustedImpl); |
| isCustomPolicy = !finalClass.equals(AUTH_POLICY); |
| return null; |
| } |
| }, Objects.requireNonNull(untrustedImpl.acc) |
| ); |
| } catch (Exception e) { |
| throw new SecurityException |
| (sun.security.util.ResourcesMgr.getString |
| ("unable.to.instantiate.Subject.based.policy")); |
| } |
| } |
| } |
| } |
| return policy; |
| } |
| |
| |
| /** |
| * Sets the system-wide Policy object. This method first calls |
| * {@code SecurityManager.checkPermission} with the |
| * {@code AuthPermission("setPolicy")} |
| * permission to ensure the caller has permission to set the Policy. |
| * |
| * @param policy the new system Policy object. |
| * |
| * @exception java.lang.SecurityException if the current thread does not |
| * have permission to set the Policy. |
| * |
| * @see #getPolicy |
| */ |
| public static void setPolicy(Policy policy) { |
| java.lang.SecurityManager sm = System.getSecurityManager(); |
| if (sm != null) sm.checkPermission(new AuthPermission("setPolicy")); |
| Policy.policy = policy; |
| // all non-null policy objects are assumed to be custom |
| isCustomPolicy = policy != null ? true : false; |
| } |
| |
| /** |
| * Returns true if a custom (not AUTH_POLICY) system-wide policy object |
| * has been set or installed. This method is called by |
| * SubjectDomainCombiner to provide backwards compatibility for |
| * developers that provide their own javax.security.auth.Policy |
| * implementations. |
| * |
| * @return true if a custom (not AUTH_POLICY) system-wide policy object |
| * has been set; false otherwise |
| */ |
| static boolean isCustomPolicySet(Debug debug) { |
| if (policy != null) { |
| if (debug != null && isCustomPolicy) { |
| debug.println("Providing backwards compatibility for " + |
| "javax.security.auth.policy implementation: " + |
| policy.toString()); |
| } |
| return isCustomPolicy; |
| } |
| // check if custom policy has been set using auth.policy.provider prop |
| String policyClass = java.security.AccessController.doPrivileged |
| (new java.security.PrivilegedAction<String>() { |
| public String run() { |
| return Security.getProperty("auth.policy.provider"); |
| } |
| }); |
| if (policyClass != null && !policyClass.equals(AUTH_POLICY)) { |
| if (debug != null) { |
| debug.println("Providing backwards compatibility for " + |
| "javax.security.auth.policy implementation: " + |
| policyClass); |
| } |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * Retrieve the Permissions granted to the Principals associated with |
| * the specified {@code CodeSource}. |
| * |
| * @param subject the {@code Subject} |
| * whose associated Principals, |
| * in conjunction with the provided |
| * {@code CodeSource}, determines the Permissions |
| * returned by this method. This parameter |
| * may be {@code null}. |
| * |
| * @param cs the code specified by its {@code CodeSource} |
| * that determines, in conjunction with the provided |
| * {@code Subject}, the Permissions |
| * returned by this method. This parameter may be |
| * {@code null}. |
| * |
| * @return the Collection of Permissions granted to all the |
| * {@code Subject} and code specified in |
| * the provided <i>subject</i> and <i>cs</i> |
| * parameters. |
| */ |
| public abstract java.security.PermissionCollection getPermissions |
| (Subject subject, |
| java.security.CodeSource cs); |
| |
| /** |
| * Refresh and reload the Policy. |
| * |
| * <p>This method causes this object to refresh/reload its current |
| * Policy. This is implementation-dependent. |
| * For example, if the Policy object is stored in |
| * a file, calling {@code refresh} will cause the file to be re-read. |
| * |
| * @exception SecurityException if the caller does not have permission |
| * to refresh the Policy. |
| */ |
| public abstract void refresh(); |
| } |
