| /* |
| * Copyright (c) OSGi Alliance (2000, 2009). All Rights Reserved. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.osgi.framework; |
| |
| import java.io.IOException; |
| import java.io.NotSerializableException; |
| import java.io.ObjectInputStream; |
| import java.io.ObjectOutputStream; |
| import java.io.ObjectStreamField; |
| import java.security.AccessController; |
| import java.security.BasicPermission; |
| import java.security.Permission; |
| import java.security.PermissionCollection; |
| import java.security.PrivilegedAction; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Dictionary; |
| import java.util.Enumeration; |
| import java.util.HashMap; |
| import java.util.Hashtable; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| |
| /** |
| * A bundle's authority to register or get a service. |
| * <ul> |
| * <li>The <code>register</code> action allows a bundle to register a service on |
| * the specified names. |
| * <li>The <code>get</code> action allows a bundle to detect a service and get |
| * it. |
| * </ul> |
| * Permission to get a service is required in order to detect events regarding |
| * the service. Untrusted bundles should not be able to detect the presence of |
| * certain services unless they have the appropriate |
| * <code>ServicePermission</code> to get the specific service. |
| * |
| * @ThreadSafe |
| * @version $Revision: 7189 $ |
| */ |
| |
| public final class ServicePermission extends BasicPermission { |
| static final long serialVersionUID = -7662148639076511574L; |
| /** |
| * The action string <code>get</code>. |
| */ |
| public final static String GET = "get"; |
| /** |
| * The action string <code>register</code>. |
| */ |
| public final static String REGISTER = "register"; |
| |
| private final static int ACTION_GET = 0x00000001; |
| private final static int ACTION_REGISTER = 0x00000002; |
| private final static int ACTION_ALL = ACTION_GET |
| | ACTION_REGISTER; |
| final static int ACTION_NONE = 0; |
| |
| /** |
| * The actions mask. |
| */ |
| transient int action_mask; |
| |
| /** |
| * The actions in canonical form. |
| * |
| * @serial |
| */ |
| private volatile String actions = null; |
| |
| /** |
| * The service used by this ServicePermission. Must be null if not |
| * constructed with a service. |
| */ |
| transient final ServiceReference service; |
| |
| /** |
| * The object classes for this ServicePermission. Must be null if not |
| * constructed with a service. |
| */ |
| transient final String[] objectClass; |
| |
| /** |
| * If this ServicePermission was constructed with a filter, this holds a |
| * Filter matching object used to evaluate the filter in implies. |
| */ |
| transient Filter filter; |
| |
| /** |
| * This dictionary holds the properties of the permission, used to match a |
| * filter in implies. This is not initialized until necessary, and then |
| * cached in this object. |
| */ |
| private transient volatile Dictionary properties; |
| |
| /** |
| * True if constructed with a name and the name is "*" or ends with ".*". |
| */ |
| private transient boolean wildcard; |
| |
| /** |
| * If constructed with a name and the name ends with ".*", this contains the |
| * name without the final "*". |
| */ |
| private transient String prefix; |
| |
| /** |
| * Create a new ServicePermission. |
| * |
| * <p> |
| * The name of the service is specified as a fully qualified class name. |
| * Wildcards may be used. |
| * |
| * <pre> |
| * name ::= <class name> | <class name ending in ".*"> | * |
| * </pre> |
| * |
| * Examples: |
| * |
| * <pre> |
| * org.osgi.service.http.HttpService |
| * org.osgi.service.http.* |
| * * |
| * </pre> |
| * |
| * For the <code>get</code> action, the name can also be a filter |
| * expression. The filter gives access to the service properties as well as |
| * the following attributes: |
| * <ul> |
| * <li>signer - A Distinguished Name chain used to sign the bundle |
| * publishing the service. Wildcards in a DN are not matched according to |
| * the filter string rules, but according to the rules defined for a DN |
| * chain.</li> |
| * <li>location - The location of the bundle publishing the service.</li> |
| * <li>id - The bundle ID of the bundle publishing the service.</li> |
| * <li>name - The symbolic name of the bundle publishing the service.</li> |
| * </ul> |
| * Since the above attribute names may conflict with service property names |
| * used by a service, you can prefix an attribute name with '@' in the |
| * filter expression to match against the service property and not one of |
| * the above attributes. Filter attribute names are processed in a case |
| * sensitive manner unless the attribute references a service property. |
| * Service properties names are case insensitive. |
| * |
| * <p> |
| * There are two possible actions: <code>get</code> and |
| * <code>register</code>. The <code>get</code> permission allows the owner |
| * of this permission to obtain a service with this name. The |
| * <code>register</code> permission allows the bundle to register a service |
| * under that name. |
| * |
| * @param name The service class name |
| * @param actions <code>get</code>,<code>register</code> (canonical order) |
| * @throws IllegalArgumentException If the specified name is a filter |
| * expression and either the specified action is not |
| * <code>get</code> or the filter has an invalid syntax. |
| */ |
| public ServicePermission(String name, String actions) { |
| this(name, parseActions(actions)); |
| if ((filter != null) |
| && ((action_mask & ACTION_ALL) != ACTION_GET)) { |
| throw new IllegalArgumentException( |
| "invalid action string for filter expression"); |
| } |
| } |
| |
| /** |
| * Creates a new requested <code>ServicePermission</code> object to be used |
| * by code that must perform <code>checkPermission</code> for the |
| * <code>get</code> action. <code>ServicePermission</code> objects created |
| * with this constructor cannot be added to a <code>ServicePermission</code> |
| * permission collection. |
| * |
| * @param reference The requested service. |
| * @param actions The action <code>get</code>. |
| * @throws IllegalArgumentException If the specified action is not |
| * <code>get</code> or reference is <code>null</code>. |
| * @since 1.5 |
| */ |
| public ServicePermission(ServiceReference reference, String actions) { |
| super(createName(reference)); |
| setTransients(null, parseActions(actions)); |
| this.service = reference; |
| this.objectClass = (String[]) reference |
| .getProperty(Constants.OBJECTCLASS); |
| if ((action_mask & ACTION_ALL) != ACTION_GET) { |
| throw new IllegalArgumentException("invalid action string"); |
| } |
| } |
| |
| /** |
| * Create a permission name from a ServiceReference |
| * |
| * @param reference ServiceReference to use to create permission name. |
| * @return permission name. |
| */ |
| private static String createName(ServiceReference reference) { |
| if (reference == null) { |
| throw new IllegalArgumentException("reference must not be null"); |
| } |
| StringBuffer sb = new StringBuffer("(service.id="); |
| sb.append(reference.getProperty(Constants.SERVICE_ID)); |
| sb.append(")"); |
| return sb.toString(); |
| } |
| |
| /** |
| * Package private constructor used by ServicePermissionCollection. |
| * |
| * @param name class name |
| * @param mask action mask |
| */ |
| ServicePermission(String name, int mask) { |
| super(name); |
| setTransients(parseFilter(name), mask); |
| this.service = null; |
| this.objectClass = null; |
| } |
| |
| /** |
| * Called by constructors and when deserialized. |
| * |
| * @param mask action mask |
| */ |
| private void setTransients(Filter f, int mask) { |
| if ((mask == ACTION_NONE) || ((mask & ACTION_ALL) != mask)) { |
| throw new IllegalArgumentException("invalid action string"); |
| } |
| action_mask = mask; |
| filter = f; |
| if (f == null) { |
| String name = getName(); |
| int l = name.length(); |
| /* if "*" or endsWith ".*" */ |
| wildcard = ((name.charAt(l - 1) == '*') && ((l == 1) || (name |
| .charAt(l - 2) == '.'))); |
| if (wildcard && (l > 1)) { |
| prefix = name.substring(0, l - 1); |
| } |
| } |
| } |
| |
| /** |
| * Parse action string into action mask. |
| * |
| * @param actions Action string. |
| * @return action mask. |
| */ |
| private static int parseActions(String actions) { |
| boolean seencomma = false; |
| |
| int mask = ACTION_NONE; |
| |
| if (actions == null) { |
| return mask; |
| } |
| |
| char[] a = actions.toCharArray(); |
| |
| int i = a.length - 1; |
| if (i < 0) |
| return mask; |
| |
| while (i != -1) { |
| char c; |
| |
| // skip whitespace |
| while ((i != -1) |
| && ((c = a[i]) == ' ' || c == '\r' || c == '\n' |
| || c == '\f' || c == '\t')) |
| i--; |
| |
| // check for the known strings |
| int matchlen; |
| |
| if (i >= 2 && (a[i - 2] == 'g' || a[i - 2] == 'G') |
| && (a[i - 1] == 'e' || a[i - 1] == 'E') |
| && (a[i] == 't' || a[i] == 'T')) { |
| matchlen = 3; |
| mask |= ACTION_GET; |
| |
| } |
| else |
| if (i >= 7 && (a[i - 7] == 'r' || a[i - 7] == 'R') |
| && (a[i - 6] == 'e' || a[i - 6] == 'E') |
| && (a[i - 5] == 'g' || a[i - 5] == 'G') |
| && (a[i - 4] == 'i' || a[i - 4] == 'I') |
| && (a[i - 3] == 's' || a[i - 3] == 'S') |
| && (a[i - 2] == 't' || a[i - 2] == 'T') |
| && (a[i - 1] == 'e' || a[i - 1] == 'E') |
| && (a[i] == 'r' || a[i] == 'R')) { |
| matchlen = 8; |
| mask |= ACTION_REGISTER; |
| |
| } |
| else { |
| // parse error |
| throw new IllegalArgumentException("invalid permission: " |
| + actions); |
| } |
| |
| // make sure we didn't just match the tail of a word |
| // like "ackbarfregister". Also, skip to the comma. |
| seencomma = false; |
| while (i >= matchlen && !seencomma) { |
| switch (a[i - matchlen]) { |
| case ',' : |
| seencomma = true; |
| /* FALLTHROUGH */ |
| case ' ' : |
| case '\r' : |
| case '\n' : |
| case '\f' : |
| case '\t' : |
| break; |
| default : |
| throw new IllegalArgumentException( |
| "invalid permission: " + actions); |
| } |
| i--; |
| } |
| |
| // point i at the location of the comma minus one (or -1). |
| i -= matchlen; |
| } |
| |
| if (seencomma) { |
| throw new IllegalArgumentException("invalid permission: " + actions); |
| } |
| |
| return mask; |
| } |
| |
| /** |
| * Parse filter string into a Filter object. |
| * |
| * @param filterString The filter string to parse. |
| * @return a Filter for this bundle. If the specified filterString is not a |
| * filter expression, then <code>null</code> is returned. |
| * @throws IllegalArgumentException If the filter syntax is invalid. |
| */ |
| private static Filter parseFilter(String filterString) { |
| filterString = filterString.trim(); |
| if (filterString.charAt(0) != '(') { |
| return null; |
| } |
| |
| try { |
| return FrameworkUtil.createFilter(filterString); |
| } |
| catch (InvalidSyntaxException e) { |
| IllegalArgumentException iae = new IllegalArgumentException( |
| "invalid filter"); |
| iae.initCause(e); |
| throw iae; |
| } |
| } |
| |
| /** |
| * Determines if a <code>ServicePermission</code> object "implies" the |
| * specified permission. |
| * |
| * @param p The target permission to check. |
| * @return <code>true</code> if the specified permission is implied by this |
| * object; <code>false</code> otherwise. |
| */ |
| public boolean implies(Permission p) { |
| if (!(p instanceof ServicePermission)) { |
| return false; |
| } |
| ServicePermission requested = (ServicePermission) p; |
| if (service != null) { |
| return false; |
| } |
| // if requested permission has a filter, then it is an invalid argument |
| if (requested.filter != null) { |
| return false; |
| } |
| return implies0(requested, ACTION_NONE); |
| } |
| |
| /** |
| * Internal implies method. Used by the implies and the permission |
| * collection implies methods. |
| * |
| * @param requested The requested ServicePermission which has already be |
| * validated as a proper argument. The requested ServicePermission |
| * must not have a filter expression. |
| * @param effective The effective actions with which to start. |
| * @return <code>true</code> if the specified permission is implied by this |
| * object; <code>false</code> otherwise. |
| */ |
| boolean implies0(ServicePermission requested, int effective) { |
| /* check actions first - much faster */ |
| effective |= action_mask; |
| final int desired = requested.action_mask; |
| if ((effective & desired) != desired) { |
| return false; |
| } |
| /* we have name of "*" */ |
| if (wildcard && (prefix == null)) { |
| return true; |
| } |
| /* if we have a filter */ |
| Filter f = filter; |
| if (f != null) { |
| return f.matchCase(requested.getProperties()); |
| } |
| /* if requested permission not created with ServiceReference */ |
| String[] requestedNames = requested.objectClass; |
| if (requestedNames == null) { |
| return super.implies(requested); |
| } |
| /* requested permission created with ServiceReference */ |
| if (wildcard) { |
| int pl = prefix.length(); |
| for (int i = 0, l = requestedNames.length; i < l; i++) { |
| String requestedName = requestedNames[i]; |
| if ((requestedName.length() > pl) |
| && requestedName.startsWith(prefix)) { |
| return true; |
| } |
| } |
| } |
| else { |
| String name = getName(); |
| for (int i = 0, l = requestedNames.length; i < l; i++) { |
| if (requestedNames[i].equals(name)) { |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Returns the canonical string representation of the actions. Always |
| * returns present actions in the following order: <code>get</code>, |
| * <code>register</code>. |
| * |
| * @return The canonical string representation of the actions. |
| */ |
| public String getActions() { |
| String result = actions; |
| if (result == null) { |
| StringBuffer sb = new StringBuffer(); |
| boolean comma = false; |
| |
| int mask = action_mask; |
| if ((mask & ACTION_GET) == ACTION_GET) { |
| sb.append(GET); |
| comma = true; |
| } |
| |
| if ((mask & ACTION_REGISTER) == ACTION_REGISTER) { |
| if (comma) |
| sb.append(','); |
| sb.append(REGISTER); |
| } |
| |
| actions = result = sb.toString(); |
| } |
| |
| return result; |
| } |
| |
| /** |
| * Returns a new <code>PermissionCollection</code> object for storing |
| * <code>ServicePermission<code> objects. |
| * |
| * @return A new <code>PermissionCollection</code> object suitable for storing |
| * <code>ServicePermission</code> objects. |
| */ |
| public PermissionCollection newPermissionCollection() { |
| return new ServicePermissionCollection(); |
| } |
| |
| /** |
| * Determines the equality of two ServicePermission objects. |
| * |
| * Checks that specified object has the same class name and action as this |
| * <code>ServicePermission</code>. |
| * |
| * @param obj The object to test for equality. |
| * @return true if obj is a <code>ServicePermission</code>, and has the same |
| * class name and actions as this <code>ServicePermission</code> |
| * object; <code>false</code> otherwise. |
| */ |
| public boolean equals(Object obj) { |
| if (obj == this) { |
| return true; |
| } |
| |
| if (!(obj instanceof ServicePermission)) { |
| return false; |
| } |
| |
| ServicePermission sp = (ServicePermission) obj; |
| |
| return (action_mask == sp.action_mask) |
| && getName().equals(sp.getName()) |
| && ((service == sp.service) || ((service != null) && (service |
| .compareTo(sp.service) == 0))); |
| } |
| |
| /** |
| * Returns the hash code value for this object. |
| * |
| * @return Hash code value for this object. |
| */ |
| public int hashCode() { |
| int h = 31 * 17 + getName().hashCode(); |
| h = 31 * h + getActions().hashCode(); |
| if (service != null) { |
| h = 31 * h + service.hashCode(); |
| } |
| return h; |
| } |
| |
| /** |
| * WriteObject is called to save the state of this permission to a stream. |
| * The actions are serialized, and the superclass takes care of the name. |
| */ |
| private synchronized void writeObject(java.io.ObjectOutputStream s) |
| throws IOException { |
| if (service != null) { |
| throw new NotSerializableException("cannot serialize"); |
| } |
| // Write out the actions. The superclass takes care of the name |
| // call getActions to make sure actions field is initialized |
| if (actions == null) |
| getActions(); |
| s.defaultWriteObject(); |
| } |
| |
| /** |
| * readObject is called to restore the state of this permission from a |
| * stream. |
| */ |
| private synchronized void readObject(java.io.ObjectInputStream s) |
| throws IOException, ClassNotFoundException { |
| // Read in the action, then initialize the rest |
| s.defaultReadObject(); |
| setTransients(parseFilter(getName()), parseActions(actions)); |
| } |
| /** |
| * Called by <code><@link ServicePermission#implies(Permission)></code>. |
| * |
| * @return a dictionary of properties for this permission. |
| */ |
| private Dictionary getProperties() { |
| Dictionary result = properties; |
| if (result != null) { |
| return result; |
| } |
| if (service == null) { |
| result = new Hashtable(1); |
| if (filter == null) { |
| result.put(Constants.OBJECTCLASS, new String[] {getName()}); |
| } |
| return properties = result; |
| } |
| final Map props = new HashMap(4); |
| final Bundle bundle = service.getBundle(); |
| if (bundle != null) { |
| AccessController.doPrivileged(new PrivilegedAction() { |
| public Object run() { |
| props.put("id", new Long(bundle.getBundleId())); |
| props.put("location", bundle.getLocation()); |
| String name = bundle.getSymbolicName(); |
| if (name != null) { |
| props.put("name", name); |
| } |
| SignerProperty signer = new SignerProperty(bundle); |
| if (signer.isBundleSigned()) { |
| props.put("signer", signer); |
| } |
| return null; |
| } |
| }); |
| } |
| return properties = new Properties(props, service); |
| } |
| |
| private static class Properties extends Dictionary { |
| private final Map properties; |
| private final ServiceReference service; |
| |
| Properties(Map properties, ServiceReference service) { |
| this.properties = properties; |
| this.service = service; |
| } |
| |
| public Object get(Object k) { |
| if (!(k instanceof String)) { |
| return null; |
| } |
| String key = (String) k; |
| if (key.charAt(0) == '@') { |
| return service.getProperty(key.substring(1)); |
| } |
| Object value = properties.get(key); |
| if (value != null) { // fall back to service properties |
| return value; |
| } |
| return service.getProperty(key); |
| } |
| |
| public int size() { |
| return properties.size() + service.getPropertyKeys().length; |
| } |
| |
| public boolean isEmpty() { |
| // we can return false because this must never be empty |
| return false; |
| } |
| |
| public Enumeration keys() { |
| Collection pk = properties.keySet(); |
| String spk[] = service.getPropertyKeys(); |
| List all = new ArrayList(pk.size() + spk.length); |
| all.addAll(pk); |
| add: |
| for (int i = 0, length = spk.length; i < length; i++) { |
| String key = spk[i]; |
| for (Iterator iter = pk.iterator(); iter.hasNext();) { |
| if (key.equalsIgnoreCase((String) iter.next())) { |
| continue add; |
| } |
| } |
| all.add(key); |
| } |
| return Collections.enumeration(all); |
| } |
| |
| public Enumeration elements() { |
| Collection pk = properties.keySet(); |
| String spk[] = service.getPropertyKeys(); |
| List all = new ArrayList(pk.size() + spk.length); |
| all.addAll(properties.values()); |
| add: |
| for (int i = 0, length = spk.length; i < length; i++) { |
| String key = spk[i]; |
| for (Iterator iter = pk.iterator(); iter.hasNext();) { |
| if (key.equalsIgnoreCase((String) iter.next())) { |
| continue add; |
| } |
| } |
| all.add(service.getProperty(key)); |
| } |
| return Collections.enumeration(all); |
| } |
| |
| public Object put(Object key, Object value) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public Object remove(Object key) { |
| throw new UnsupportedOperationException(); |
| } |
| } |
| } |
| |
| /** |
| * Stores a set of ServicePermission permissions. |
| * |
| * @see java.security.Permission |
| * @see java.security.Permissions |
| * @see java.security.PermissionCollection |
| */ |
| final class ServicePermissionCollection extends PermissionCollection { |
| static final long serialVersionUID = 662615640374640621L; |
| /** |
| * Table of permissions. |
| * |
| * @GuardedBy this |
| */ |
| private transient Map permissions; |
| |
| /** |
| * Boolean saying if "*" is in the collection. |
| * |
| * @serial |
| * @GuardedBy this |
| */ |
| private boolean all_allowed; |
| |
| /** |
| * Table of permissions with filter expressions. |
| * |
| * @serial |
| * @GuardedBy this |
| */ |
| private Map filterPermissions; |
| |
| /** |
| * Creates an empty ServicePermissions object. |
| */ |
| public ServicePermissionCollection() { |
| permissions = new HashMap(); |
| all_allowed = false; |
| } |
| |
| /** |
| * Adds a permission to this permission collection. |
| * |
| * @param permission The Permission object to add. |
| * @throws IllegalArgumentException If the specified permission is not a |
| * ServicePermission object. |
| * @throws SecurityException If this |
| * <code>ServicePermissionCollection</code> object has been marked |
| * read-only. |
| */ |
| public void add(final Permission permission) { |
| if (!(permission instanceof ServicePermission)) { |
| throw new IllegalArgumentException("invalid permission: " |
| + permission); |
| } |
| if (isReadOnly()) { |
| throw new SecurityException("attempt to add a Permission to a " |
| + "readonly PermissionCollection"); |
| } |
| |
| final ServicePermission sp = (ServicePermission) permission; |
| if (sp.service != null) { |
| throw new IllegalArgumentException("cannot add to collection: " |
| + sp); |
| } |
| |
| final String name = sp.getName(); |
| final Filter f = sp.filter; |
| synchronized (this) { |
| /* select the bucket for the permission */ |
| Map pc; |
| if (f != null) { |
| pc = filterPermissions; |
| if (pc == null) { |
| filterPermissions = pc = new HashMap(); |
| } |
| } |
| else { |
| pc = permissions; |
| } |
| final ServicePermission existing = (ServicePermission) pc.get(name); |
| |
| if (existing != null) { |
| final int oldMask = existing.action_mask; |
| final int newMask = sp.action_mask; |
| if (oldMask != newMask) { |
| pc |
| .put(name, new ServicePermission(name, oldMask |
| | newMask)); |
| } |
| } |
| else { |
| pc.put(name, sp); |
| } |
| |
| if (!all_allowed) { |
| if (name.equals("*")) { |
| all_allowed = true; |
| } |
| } |
| } |
| } |
| |
| /** |
| * Determines if a set of permissions implies the permissions expressed in |
| * <code>permission</code>. |
| * |
| * @param permission The Permission object to compare. |
| * @return <code>true</code> if <code>permission</code> is a proper |
| * subset of a permission in the set; <code>false</code> |
| * otherwise. |
| */ |
| public boolean implies(final Permission permission) { |
| if (!(permission instanceof ServicePermission)) { |
| return false; |
| } |
| final ServicePermission requested = (ServicePermission) permission; |
| /* if requested permission has a filter, then it is an invalid argument */ |
| if (requested.filter != null) { |
| return false; |
| } |
| |
| int effective = ServicePermission.ACTION_NONE; |
| Collection perms; |
| synchronized (this) { |
| final int desired = requested.action_mask; |
| /* short circuit if the "*" Permission was added */ |
| if (all_allowed) { |
| ServicePermission sp = (ServicePermission) permissions.get("*"); |
| if (sp != null) { |
| effective |= sp.action_mask; |
| if ((effective & desired) == desired) { |
| return true; |
| } |
| } |
| } |
| |
| String[] requestedNames = requested.objectClass; |
| /* if requested permission not created with ServiceReference */ |
| if (requestedNames == null) { |
| effective |= effective(requested.getName(), desired, effective); |
| if ((effective & desired) == desired) { |
| return true; |
| } |
| } |
| /* requested permission created with ServiceReference */ |
| else { |
| for (int i = 0, l = requestedNames.length; i < l; i++) { |
| if ((effective(requestedNames[i], desired, effective) & desired) == desired) { |
| return true; |
| } |
| } |
| } |
| Map pc = filterPermissions; |
| if (pc == null) { |
| return false; |
| } |
| perms = pc.values(); |
| } |
| |
| /* iterate one by one over filteredPermissions */ |
| for (Iterator iter = perms.iterator(); iter.hasNext();) { |
| if (((ServicePermission) iter.next()) |
| .implies0(requested, effective)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Consult permissions map to compute the effective permission for the |
| * requested permission name. |
| * |
| * @param requestedName The requested service name. |
| * @param desired The desired actions. |
| * @param effective The effective actions. |
| * @return The new effective actions. |
| */ |
| private int effective(String requestedName, final int desired, |
| int effective) { |
| final Map pc = permissions; |
| ServicePermission sp = (ServicePermission) pc.get(requestedName); |
| // strategy: |
| // Check for full match first. Then work our way up the |
| // name looking for matches on a.b.* |
| if (sp != null) { |
| // we have a direct hit! |
| effective |= sp.action_mask; |
| if ((effective & desired) == desired) { |
| return effective; |
| } |
| } |
| // work our way up the tree... |
| int last; |
| int offset = requestedName.length() - 1; |
| while ((last = requestedName.lastIndexOf(".", offset)) != -1) { |
| requestedName = requestedName.substring(0, last + 1) + "*"; |
| sp = (ServicePermission) pc.get(requestedName); |
| if (sp != null) { |
| effective |= sp.action_mask; |
| if ((effective & desired) == desired) { |
| return effective; |
| } |
| } |
| offset = last - 1; |
| } |
| /* |
| * we don't have to check for "*" as it was already checked before we |
| * were called. |
| */ |
| return effective; |
| } |
| |
| /** |
| * Returns an enumeration of all the <code>ServicePermission</code> |
| * objects in the container. |
| * |
| * @return Enumeration of all the ServicePermission objects. |
| */ |
| public synchronized Enumeration elements() { |
| List all = new ArrayList(permissions.values()); |
| Map pc = filterPermissions; |
| if (pc != null) { |
| all.addAll(pc.values()); |
| } |
| return Collections.enumeration(all); |
| } |
| |
| /* serialization logic */ |
| private static final ObjectStreamField[] serialPersistentFields = { |
| new ObjectStreamField("permissions", Hashtable.class), |
| new ObjectStreamField("all_allowed", Boolean.TYPE), |
| new ObjectStreamField("filterPermissions", HashMap.class) }; |
| |
| private synchronized void writeObject(ObjectOutputStream out) |
| throws IOException { |
| Hashtable hashtable = new Hashtable(permissions); |
| ObjectOutputStream.PutField pfields = out.putFields(); |
| pfields.put("permissions", hashtable); |
| pfields.put("all_allowed", all_allowed); |
| pfields.put("filterPermissions", filterPermissions); |
| out.writeFields(); |
| } |
| |
| private synchronized void readObject(java.io.ObjectInputStream in) |
| throws IOException, ClassNotFoundException { |
| ObjectInputStream.GetField gfields = in.readFields(); |
| Hashtable hashtable = (Hashtable) gfields.get("permissions", null); |
| permissions = new HashMap(hashtable); |
| all_allowed = gfields.get("all_allowed", false); |
| filterPermissions = (HashMap) gfields.get("filterPermissions", null); |
| } |
| } |