mirror of git://gcc.gnu.org/git/gcc.git
688 lines
24 KiB
Java
688 lines
24 KiB
Java
/* PolicyFile.java -- policy file reader
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Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.java.security;
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import gnu.classpath.debug.Component;
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import gnu.classpath.debug.SystemLogger;
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import gnu.java.lang.CPStringBuilder;
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import gnu.java.security.action.GetPropertyAction;
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import java.io.File;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.io.StreamTokenizer;
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import java.lang.reflect.Constructor;
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import java.net.MalformedURLException;
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import java.net.URL;
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import java.security.AccessController;
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import java.security.CodeSource;
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import java.security.KeyStore;
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import java.security.KeyStoreException;
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import java.security.Permission;
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import java.security.PermissionCollection;
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import java.security.Permissions;
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import java.security.Policy;
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import java.security.Principal;
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import java.security.PrivilegedActionException;
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import java.security.PrivilegedExceptionAction;
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import java.security.Security;
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import java.security.UnresolvedPermission;
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import java.security.cert.Certificate;
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import java.security.cert.X509Certificate;
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import java.util.Enumeration;
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import java.util.HashMap;
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import java.util.Iterator;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.Map;
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import java.util.StringTokenizer;
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import java.util.logging.Logger;
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/**
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* An implementation of a {@link java.security.Policy} object whose
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* permissions are specified by a <em>policy file</em>.
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*
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* <p>The approximate syntax of policy files is:</p>
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*
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* <pre>
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* policyFile ::= keystoreOrGrantEntries ;
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*
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* keystoreOrGrantEntries ::= keystoreOrGrantEntry |
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* keystoreOrGrantEntries keystoreOrGrantEntry |
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* EMPTY ;
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*
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* keystoreOrGrantEntry ::= keystoreEntry | grantEntry ;
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*
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* keystoreEntry ::= "keystore" keystoreUrl ';' |
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* "keystore" keystoreUrl ',' keystoreAlgorithm ';' ;
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*
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* keystoreUrl ::= URL ;
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* keystoreAlgorithm ::= STRING ;
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*
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* grantEntry ::= "grant" domainParameters '{' permissions '}' ';'
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*
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* domainParameters ::= domainParameter |
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* domainParameter ',' domainParameters ;
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*
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* domainParameter ::= "signedBy" signerNames |
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* "codeBase" codeBaseUrl |
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* "principal" principalClassName principalName |
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* "principal" principalName ;
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*
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* signerNames ::= quotedString ;
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* codeBaseUrl ::= URL ;
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* principalClassName ::= STRING ;
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* principalName ::= quotedString ;
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*
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* quotedString ::= quoteChar STRING quoteChar ;
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* quoteChar ::= '"' | '\'';
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*
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* permissions ::= permission | permissions permission ;
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*
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* permission ::= "permission" permissionClassName permissionTarget permissionAction |
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* "permission" permissionClassName permissionTarget |
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* "permission" permissionClassName;
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* </pre>
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*
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* <p>Comments are either form of Java comments. Keystore entries only
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* affect subsequent grant entries, so if a grant entry preceeds a
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* keystore entry, that grant entry is not affected by that keystore
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* entry. Certian instances of <code>${property-name}</code> will be
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* replaced with <code>System.getProperty("property-name")</code> in
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* quoted strings.</p>
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*
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* <p>This class will load the following files when created or
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* refreshed, in order:</p>
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*
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* <ol>
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* <li>The file <code>${java.home}/lib/security/java.policy</code>.</li>
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* <li>All URLs specified by security properties
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* <code>"policy.file.<i>n</i>"</code>, for increasing <i>n</i>
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* starting from 1. The sequence stops at the first undefined
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* property, so you must set <code>"policy.file.1"</code> if you also
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* set <code>"policy.file.2"</code>, and so on.</li>
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* <li>The URL specified by the property
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* <code>"java.security.policy"</code>.</li>
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* </ol>
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*
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* @author Casey Marshall (csm@gnu.org)
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* @see java.security.Policy
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*/
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public final class PolicyFile extends Policy
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{
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// Constants and fields.
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// -------------------------------------------------------------------------
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protected static final Logger logger = SystemLogger.SYSTEM;
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// Added to cut redundant AccessController.doPrivileged calls
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private static GetPropertyAction prop = new GetPropertyAction("file.separator");
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private static final String fs = (String) AccessController.doPrivileged(prop);
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private static final String DEFAULT_POLICY =
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(String) AccessController.doPrivileged(prop.setParameters("java.home"))
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+ fs + "lib" + fs + "security" + fs + "java.policy";
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private static final String DEFAULT_USER_POLICY =
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(String) AccessController.doPrivileged(prop.setParameters("user.home")) +
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fs + ".java.policy";
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private final Map cs2pc;
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// Constructors.
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// -------------------------------------------------------------------------
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public PolicyFile()
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{
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cs2pc = new HashMap();
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refresh();
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}
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// Instance methods.
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// -------------------------------------------------------------------------
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public PermissionCollection getPermissions(CodeSource codeSource)
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{
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Permissions perms = new Permissions();
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for (Iterator it = cs2pc.entrySet().iterator(); it.hasNext(); )
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{
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Map.Entry e = (Map.Entry) it.next();
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CodeSource cs = (CodeSource) e.getKey();
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if (cs.implies(codeSource))
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{
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logger.log (Component.POLICY, "{0} -> {1}", new Object[]
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{ cs, codeSource });
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PermissionCollection pc = (PermissionCollection) e.getValue();
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for (Enumeration ee = pc.elements(); ee.hasMoreElements(); )
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{
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perms.add((Permission) ee.nextElement());
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}
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}
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else
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logger.log (Component.POLICY, "{0} !-> {1}", new Object[]
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{ cs, codeSource });
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}
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logger.log (Component.POLICY, "returning permissions {0} for {1}",
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new Object[] { perms, codeSource });
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return perms;
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}
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public void refresh()
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{
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cs2pc.clear();
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final List policyFiles = new LinkedList();
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try
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{
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policyFiles.add (new File (DEFAULT_POLICY).toURL());
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policyFiles.add (new File (DEFAULT_USER_POLICY).toURL ());
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AccessController.doPrivileged(
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new PrivilegedExceptionAction()
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{
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public Object run() throws Exception
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{
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String allow = Security.getProperty ("policy.allowSystemProperty");
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if (allow == null || Boolean.getBoolean (allow))
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{
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String s = System.getProperty ("java.security.policy");
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logger.log (Component.POLICY, "java.security.policy={0}", s);
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if (s != null)
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{
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boolean only = s.startsWith ("=");
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if (only)
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s = s.substring (1);
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policyFiles.clear ();
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policyFiles.add (new URL (s));
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if (only)
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return null;
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}
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}
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for (int i = 1; ; i++)
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{
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String pname = "policy.url." + i;
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String s = Security.getProperty (pname);
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logger.log (Component.POLICY, "{0}={1}", new Object []
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{ pname, s });
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if (s == null)
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break;
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policyFiles.add (new URL (s));
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}
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return null;
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}
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});
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}
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catch (PrivilegedActionException pae)
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{
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logger.log (Component.POLICY, "reading policy properties", pae);
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}
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catch (MalformedURLException mue)
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{
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logger.log (Component.POLICY, "setting default policies", mue);
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}
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logger.log (Component.POLICY, "building policy from URLs {0}",
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policyFiles);
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for (Iterator it = policyFiles.iterator(); it.hasNext(); )
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{
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try
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{
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URL url = (URL) it.next();
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parse(url);
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}
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catch (IOException ioe)
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{
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logger.log (Component.POLICY, "reading policy", ioe);
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}
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}
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}
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public String toString()
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{
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return super.toString() + " [ " + cs2pc.toString() + " ]";
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}
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// Own methods.
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// -------------------------------------------------------------------------
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private static final int STATE_BEGIN = 0;
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private static final int STATE_GRANT = 1;
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private static final int STATE_PERMS = 2;
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/**
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* Parse a policy file, incorporating the permission definitions
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* described therein.
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*
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* @param url The URL of the policy file to read.
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* @throws IOException if an I/O error occurs, or if the policy file
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* cannot be parsed.
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*/
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private void parse(final URL url) throws IOException
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{
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logger.log (Component.POLICY, "reading policy file from {0}", url);
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final StreamTokenizer in = new StreamTokenizer(new InputStreamReader(url.openStream()));
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in.resetSyntax();
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in.slashSlashComments(true);
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in.slashStarComments(true);
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in.wordChars('A', 'Z');
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in.wordChars('a', 'z');
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in.wordChars('0', '9');
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in.wordChars('.', '.');
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in.wordChars('_', '_');
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in.wordChars('$', '$');
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in.whitespaceChars(' ', ' ');
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in.whitespaceChars('\t', '\t');
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in.whitespaceChars('\f', '\f');
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in.whitespaceChars('\n', '\n');
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in.whitespaceChars('\r', '\r');
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in.quoteChar('\'');
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in.quoteChar('"');
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int tok;
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int state = STATE_BEGIN;
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List keystores = new LinkedList();
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URL currentBase = null;
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List currentCerts = new LinkedList();
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Permissions currentPerms = new Permissions();
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while ((tok = in.nextToken()) != StreamTokenizer.TT_EOF)
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{
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switch (tok)
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{
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case '{':
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if (state != STATE_GRANT)
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error(url, in, "spurious '{'");
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state = STATE_PERMS;
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tok = in.nextToken();
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break;
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case '}':
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if (state != STATE_PERMS)
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error(url, in, "spurious '}'");
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state = STATE_BEGIN;
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currentPerms.setReadOnly();
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Certificate[] c = null;
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if (!currentCerts.isEmpty())
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c = (Certificate[]) currentCerts.toArray(new Certificate[currentCerts.size()]);
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cs2pc.put(new CodeSource(currentBase, c), currentPerms);
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currentCerts.clear();
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currentPerms = new Permissions();
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currentBase = null;
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tok = in.nextToken();
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if (tok != ';')
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in.pushBack();
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continue;
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}
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if (tok != StreamTokenizer.TT_WORD)
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{
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error(url, in, "expecting word token");
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}
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// keystore "<keystore-path>" [',' "<keystore-type>"] ';'
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if (in.sval.equalsIgnoreCase("keystore"))
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{
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String alg = KeyStore.getDefaultType();
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tok = in.nextToken();
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if (tok != '"' && tok != '\'')
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error(url, in, "expecting key store URL");
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String store = in.sval;
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tok = in.nextToken();
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if (tok == ',')
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{
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tok = in.nextToken();
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if (tok != '"' && tok != '\'')
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error(url, in, "expecting key store type");
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alg = in.sval;
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tok = in.nextToken();
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}
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if (tok != ';')
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error(url, in, "expecting semicolon");
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try
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{
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KeyStore keystore = KeyStore.getInstance(alg);
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keystore.load(new URL(url, store).openStream(), null);
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keystores.add(keystore);
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}
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catch (Exception x)
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{
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error(url, in, x.toString());
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}
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}
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else if (in.sval.equalsIgnoreCase("grant"))
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{
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if (state != STATE_BEGIN)
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error(url, in, "extraneous grant keyword");
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state = STATE_GRANT;
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}
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else if (in.sval.equalsIgnoreCase("signedBy"))
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{
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if (state != STATE_GRANT && state != STATE_PERMS)
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error(url, in, "spurious 'signedBy'");
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if (keystores.isEmpty())
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error(url, in, "'signedBy' with no keystores");
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tok = in.nextToken();
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if (tok != '"' && tok != '\'')
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error(url, in, "expecting signedBy name");
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StringTokenizer st = new StringTokenizer(in.sval, ",");
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while (st.hasMoreTokens())
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{
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String alias = st.nextToken();
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for (Iterator it = keystores.iterator(); it.hasNext(); )
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{
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KeyStore keystore = (KeyStore) it.next();
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try
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{
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if (keystore.isCertificateEntry(alias))
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currentCerts.add(keystore.getCertificate(alias));
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}
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catch (KeyStoreException kse)
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{
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error(url, in, kse.toString());
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}
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}
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}
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tok = in.nextToken();
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if (tok != ',')
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{
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if (state != STATE_GRANT)
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error(url, in, "spurious ','");
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in.pushBack();
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}
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}
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else if (in.sval.equalsIgnoreCase("codeBase"))
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{
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if (state != STATE_GRANT)
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error(url, in, "spurious 'codeBase'");
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tok = in.nextToken();
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if (tok != '"' && tok != '\'')
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error(url, in, "expecting code base URL");
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String base = expand(in.sval);
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if (File.separatorChar != '/')
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base = base.replace(File.separatorChar, '/');
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try
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{
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currentBase = new URL(base);
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}
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catch (MalformedURLException mue)
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{
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error(url, in, mue.toString());
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}
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tok = in.nextToken();
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if (tok != ',')
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in.pushBack();
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}
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else if (in.sval.equalsIgnoreCase("principal"))
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{
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if (state != STATE_GRANT)
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error(url, in, "spurious 'principal'");
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tok = in.nextToken();
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if (tok == StreamTokenizer.TT_WORD)
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{
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tok = in.nextToken();
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if (tok != '"' && tok != '\'')
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error(url, in, "expecting principal name");
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String name = in.sval;
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Principal p = null;
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try
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{
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Class pclass = Class.forName(in.sval);
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Constructor c =
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pclass.getConstructor(new Class[] { String.class });
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p = (Principal) c.newInstance(new Object[] { name });
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}
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catch (Exception x)
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{
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error(url, in, x.toString());
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}
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for (Iterator it = keystores.iterator(); it.hasNext(); )
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{
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KeyStore ks = (KeyStore) it.next();
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try
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{
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for (Enumeration e = ks.aliases(); e.hasMoreElements(); )
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{
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String alias = (String) e.nextElement();
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if (ks.isCertificateEntry(alias))
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{
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Certificate cert = ks.getCertificate(alias);
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if (!(cert instanceof X509Certificate))
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continue;
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if (p.equals(((X509Certificate) cert).getSubjectDN()) ||
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p.equals(((X509Certificate) cert).getSubjectX500Principal()))
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currentCerts.add(cert);
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}
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}
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}
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catch (KeyStoreException kse)
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{
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error(url, in, kse.toString());
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}
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}
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}
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else if (tok == '"' || tok == '\'')
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{
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String alias = in.sval;
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for (Iterator it = keystores.iterator(); it.hasNext(); )
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{
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KeyStore ks = (KeyStore) it.next();
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try
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{
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if (ks.isCertificateEntry(alias))
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currentCerts.add(ks.getCertificate(alias));
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}
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catch (KeyStoreException kse)
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{
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error(url, in, kse.toString());
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}
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}
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}
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else
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error(url, in, "expecting principal");
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tok = in.nextToken();
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if (tok != ',')
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in.pushBack();
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}
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else if (in.sval.equalsIgnoreCase("permission"))
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{
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if (state != STATE_PERMS)
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error(url, in, "spurious 'permission'");
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tok = in.nextToken();
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if (tok != StreamTokenizer.TT_WORD)
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error(url, in, "expecting permission class name");
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String className = in.sval;
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Class clazz = null;
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try
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{
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clazz = Class.forName(className);
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|
}
|
|
catch (ClassNotFoundException cnfe)
|
|
{
|
|
}
|
|
tok = in.nextToken();
|
|
if (tok == ';')
|
|
{
|
|
if (clazz == null)
|
|
{
|
|
currentPerms.add(new UnresolvedPermission(className,
|
|
null, null, (Certificate[]) currentCerts.toArray(new Certificate[currentCerts.size()])));
|
|
continue;
|
|
}
|
|
try
|
|
{
|
|
currentPerms.add((Permission) clazz.newInstance());
|
|
}
|
|
catch (Exception x)
|
|
{
|
|
error(url, in, x.toString());
|
|
}
|
|
continue;
|
|
}
|
|
if (tok != '"' && tok != '\'')
|
|
error(url, in, "expecting permission target");
|
|
String target = expand(in.sval);
|
|
tok = in.nextToken();
|
|
if (tok == ';')
|
|
{
|
|
if (clazz == null)
|
|
{
|
|
currentPerms.add(new UnresolvedPermission(className,
|
|
target, null, (Certificate[]) currentCerts.toArray(new Certificate[currentCerts.size()])));
|
|
continue;
|
|
}
|
|
try
|
|
{
|
|
Constructor c =
|
|
clazz.getConstructor(new Class[] { String.class });
|
|
currentPerms.add((Permission) c.newInstance(
|
|
new Object[] { target }));
|
|
}
|
|
catch (Exception x)
|
|
{
|
|
error(url, in, x.toString());
|
|
}
|
|
continue;
|
|
}
|
|
if (tok != ',')
|
|
error(url, in, "expecting ','");
|
|
tok = in.nextToken();
|
|
if (tok == StreamTokenizer.TT_WORD)
|
|
{
|
|
if (!in.sval.equalsIgnoreCase("signedBy"))
|
|
error(url, in, "expecting 'signedBy'");
|
|
try
|
|
{
|
|
Constructor c =
|
|
clazz.getConstructor(new Class[] { String.class });
|
|
currentPerms.add((Permission) c.newInstance(
|
|
new Object[] { target }));
|
|
}
|
|
catch (Exception x)
|
|
{
|
|
error(url, in, x.toString());
|
|
}
|
|
in.pushBack();
|
|
continue;
|
|
}
|
|
if (tok != '"' && tok != '\'')
|
|
error(url, in, "expecting permission action");
|
|
String action = in.sval;
|
|
if (clazz == null)
|
|
{
|
|
currentPerms.add(new UnresolvedPermission(className,
|
|
target, action, (Certificate[]) currentCerts.toArray(new Certificate[currentCerts.size()])));
|
|
continue;
|
|
}
|
|
else
|
|
{
|
|
try
|
|
{
|
|
Constructor c = clazz.getConstructor(
|
|
new Class[] { String.class, String.class });
|
|
currentPerms.add((Permission) c.newInstance(
|
|
new Object[] { target, action }));
|
|
}
|
|
catch (Exception x)
|
|
{
|
|
error(url, in, x.toString());
|
|
}
|
|
}
|
|
tok = in.nextToken();
|
|
if (tok != ';' && tok != ',')
|
|
error(url, in, "expecting ';' or ','");
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Expand all instances of <code>"${property-name}"</code> into
|
|
* <code>System.getProperty("property-name")</code>.
|
|
*/
|
|
private static String expand(final String s)
|
|
{
|
|
final CPStringBuilder result = new CPStringBuilder();
|
|
final CPStringBuilder prop = new CPStringBuilder();
|
|
int state = 0;
|
|
for (int i = 0; i < s.length(); i++)
|
|
{
|
|
switch (state)
|
|
{
|
|
case 0:
|
|
if (s.charAt(i) == '$')
|
|
state = 1;
|
|
else
|
|
result.append(s.charAt(i));
|
|
break;
|
|
case 1:
|
|
if (s.charAt(i) == '{')
|
|
state = 2;
|
|
else
|
|
{
|
|
state = 0;
|
|
result.append('$').append(s.charAt(i));
|
|
}
|
|
break;
|
|
case 2:
|
|
if (s.charAt(i) == '}')
|
|
{
|
|
String p = prop.toString();
|
|
if (p.equals("/"))
|
|
p = "file.separator";
|
|
p = System.getProperty(p);
|
|
if (p == null)
|
|
p = "";
|
|
result.append(p);
|
|
prop.setLength(0);
|
|
state = 0;
|
|
}
|
|
else
|
|
prop.append(s.charAt(i));
|
|
break;
|
|
}
|
|
}
|
|
if (state != 0)
|
|
result.append('$').append('{').append(prop);
|
|
return result.toString();
|
|
}
|
|
|
|
/**
|
|
* I miss macros.
|
|
*/
|
|
private static void error(URL base, StreamTokenizer in, String msg)
|
|
throws IOException
|
|
{
|
|
throw new IOException(base+":"+in.lineno()+": "+msg);
|
|
}
|
|
}
|