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Add interface for restricting arbitrary objects on a per-user basis (#266, #267).

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Michael Jumper
2013-01-26 17:05:35 -08:00
committed by Michael Jumper
parent 6d64a3e161
commit ef342e9100
2 changed files with 228 additions and 0 deletions
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116
guacamole-ext/src/main/java/net/sourceforge/guacamole/net/auth/Restrictable.java Normal file
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package net.sourceforge.guacamole.net.auth;
import net.sourceforge.guacamole.GuacamoleException;
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is guacamole-auth.
*
* The Initial Developer of the Original Code is
* Michael Jumper.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/**
* Interface which allows restricted objects to expose their restrictions.
*
* @author Michael Jumper
*/
public interface Restrictable {
/**
* All possible permissions for a restricted object.
*/
public enum Permission {
/**
* Access to read properties of the restricted object.
*/
READ,
/**
* Access to write properties of the restricted object.
*/
WRITE,
/**
* Access to change permissions of the restricted object.
*/
ADMINISTER
}
/**
* Checks whether the given user has the given permission on this object.
* Depending on the credentials given, access to reading permissions may
* be denied.
*
* @param credentials The credentials to use when reading permissions.
* @param user The user to read the permissions for.
* @param permission The permission to check.
* @return true if the user has the given permission, false otherwise.
* @throws GuacamoleException If an error occurs while reading the
* permissions, such as permission being denied.
*/
public boolean hasPermission(Credentials credentials,
User user, Permission permission) throws GuacamoleException;
/**
* Adds the given permission to the given user for this object. Depending
* on the credentials given, access to administering permissions may be
* denied.
*
* @param credentials The credentials to use when adding permissions.
* @param user The user to add the permission for.
* @param permission The permission to add.
* @throws GuacamoleException If an error occurs while adding the
* permission, such as permission being denied.
*/
public void addPermission(Credentials credentials,
User user, Permission permission) throws GuacamoleException;
/**
* Removes the given permission from the given user for this object.
* Depending on the credentials given, access to administering permissions
* may be denied.
*
* @param credentials The credentials to use when removing permissions.
* @param user The user to remove the permission from.
* @param permission The permission to add.
* @throws GuacamoleException If an error occurs while removing the
* permission, such as permission being denied.
*/
public void removePermission(Credentials credentials,
User user, Permission permission) throws GuacamoleException;
}

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guacamole-ext/src/main/java/net/sourceforge/guacamole/net/auth/RestrictedObject.java Normal file
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package net.sourceforge.guacamole.net.auth;
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is guacamole-auth.
*
* The Initial Developer of the Original Code is
* Michael Jumper.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
import java.util.EnumSet;
import java.util.HashMap;
import java.util.Map;
import net.sourceforge.guacamole.GuacamoleException;
/**
* A basic object providing permissions access and storage.
*
* @author Michael Jumper
*/
public abstract class RestrictedObject implements Restrictable {
/**
* Map of all user permissions.
*/
private Map<User, EnumSet<Restrictable.Permission>> permissions =
new HashMap<User, EnumSet<Restrictable.Permission>>();
@Override
public boolean hasPermission(Credentials credentials,
User user, Permission permission) throws GuacamoleException {
// Get permissions set, if any
EnumSet<Restrictable.Permission> userPermissions =
permissions.get(user);
// If permission set exists for this user, just test whether permission
// set contains the requested permission.
if (userPermissions != null)
return userPermissions.contains(permission);
// Default to no permission
return false;
}
@Override
public void addPermission(Credentials credentials,
User user, Permission permission) throws GuacamoleException {
// Get permissions set, if any
EnumSet<Restrictable.Permission> userPermissions =
permissions.get(user);
// If set does not exist, create it
if (userPermissions == null) {
userPermissions = EnumSet.<Restrictable.Permission>of(permission);
permissions.put(user, userPermissions);
}
// Otherwise, just add permission
else
userPermissions.add(permission);
}
@Override
public void removePermission(Credentials credentials,
User user, Permission permission) throws GuacamoleException {
// Get permissions set, if any
EnumSet<Restrictable.Permission> userPermissions =
permissions.get(user);
// Remove permission
if (userPermissions != null)
userPermissions.remove(permission);
}
}