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authorDiva Canto2010-07-30 14:04:29 -0700
committerDiva Canto2010-07-30 14:04:29 -0700
commitf3fa10fa151ef5f07599d557d1f7c05656e7ea04 (patch)
treea14ca2b853df1aa87cad30664210c995006e358e /OpenSim/Framework/ACL.cs
parentChanged the way HG client verification is done: now transforming local and LA... (diff)
parentremove gods event subscription to gods module from scene (diff)
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Merge branch 'master' of ssh://diva@opensimulator.org/var/git/opensim
Diffstat (limited to 'OpenSim/Framework/ACL.cs')
-rw-r--r--OpenSim/Framework/ACL.cs252
1 files changed, 0 insertions, 252 deletions
diff --git a/OpenSim/Framework/ACL.cs b/OpenSim/Framework/ACL.cs
deleted file mode 100644
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1/*
2 * Copyright (c) Contributors, http://opensimulator.org/
3 * See CONTRIBUTORS.TXT for a full list of copyright holders.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * * Neither the name of the OpenSimulator Project nor the
13 * names of its contributors may be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28using System;
29using System.Collections.Generic;
30
31namespace OpenSim.Framework
32{
33 // ACL Class
34 // Modelled after the structure of the Zend ACL Framework Library
35 // with one key difference - the tree will search for all matching
36 // permissions rather than just the first. Deny permissions will
37 // override all others.
38
39 #region ACL Core Class
40
41 /// <summary>
42 /// Access Control List Engine
43 /// </summary>
44 public class ACL
45 {
46 private Dictionary<string, Resource> Resources = new Dictionary<string, Resource>();
47 private Dictionary<string, Role> Roles = new Dictionary<string, Role>();
48
49 /// <summary>
50 /// Adds a new role
51 /// </summary>
52 /// <param name="role"></param>
53 /// <returns></returns>
54 public ACL AddRole(Role role)
55 {
56 if (Roles.ContainsKey(role.Name))
57 throw new AlreadyContainsRoleException(role);
58
59 Roles.Add(role.Name, role);
60
61 return this;
62 }
63
64 /// <summary>
65 /// Adds a new resource
66 /// </summary>
67 /// <param name="resource"></param>
68 /// <returns></returns>
69 public ACL AddResource(Resource resource)
70 {
71 Resources.Add(resource.Name, resource);
72
73 return this;
74 }
75
76 /// <summary>
77 /// Permision for user/roll on a resource
78 /// </summary>
79 /// <param name="role"></param>
80 /// <param name="resource"></param>
81 /// <returns></returns>
82 public Permission HasPermission(string role, string resource)
83 {
84 if (!Roles.ContainsKey(role))
85 throw new KeyNotFoundException();
86
87 if (!Resources.ContainsKey(resource))
88 throw new KeyNotFoundException();
89
90 return Roles[role].RequestPermission(resource);
91 }
92
93 public ACL GrantPermission(string role, string resource)
94 {
95 if (!Roles.ContainsKey(role))
96 throw new KeyNotFoundException();
97
98 if (!Resources.ContainsKey(resource))
99 throw new KeyNotFoundException();
100
101 Roles[role].GivePermission(resource, Permission.Allow);
102
103 return this;
104 }
105
106 public ACL DenyPermission(string role, string resource)
107 {
108 if (!Roles.ContainsKey(role))
109 throw new KeyNotFoundException();
110
111 if (!Resources.ContainsKey(resource))
112 throw new KeyNotFoundException();
113
114 Roles[role].GivePermission(resource, Permission.Deny);
115
116 return this;
117 }
118
119 public ACL ResetPermission(string role, string resource)
120 {
121 if (!Roles.ContainsKey(role))
122 throw new KeyNotFoundException();
123
124 if (!Resources.ContainsKey(resource))
125 throw new KeyNotFoundException();
126
127 Roles[role].GivePermission(resource, Permission.None);
128
129 return this;
130 }
131 }
132
133 #endregion
134
135 #region Exceptions
136
137 /// <summary>
138 /// Thrown when an ACL attempts to add a duplicate role.
139 /// </summary>
140 public class AlreadyContainsRoleException : Exception
141 {
142 protected Role m_role;
143
144 public AlreadyContainsRoleException(Role role)
145 {
146 m_role = role;
147 }
148
149 public Role ErrorRole
150 {
151 get { return m_role; }
152 }
153
154 public override string ToString()
155 {
156 return "This ACL already contains a role called '" + m_role.Name + "'.";
157 }
158 }
159
160 #endregion
161
162 #region Roles and Resources
163
164 /// <summary>
165 /// Does this Role have permission to access a specified Resource?
166 /// </summary>
167 public enum Permission
168 {
169 Deny,
170 None,
171 Allow
172 } ;
173
174 /// <summary>
175 /// A role class, for use with Users or Groups
176 /// </summary>
177 public class Role
178 {
179 private string m_name;
180 private Role[] m_parents;
181 private Dictionary<string, Permission> m_resources = new Dictionary<string, Permission>();
182
183 public Role(string name)
184 {
185 m_name = name;
186 m_parents = null;
187 }
188
189 public Role(string name, Role[] parents)
190 {
191 m_name = name;
192 m_parents = parents;
193 }
194
195 public string Name
196 {
197 get { return m_name; }
198 }
199
200 public Permission RequestPermission(string resource)
201 {
202 return RequestPermission(resource, Permission.None);
203 }
204
205 public Permission RequestPermission(string resource, Permission current)
206 {
207 // Deny permissions always override any others
208 if (current == Permission.Deny)
209 return current;
210
211 Permission temp = Permission.None;
212
213 // Pickup non-None permissions
214 if (m_resources.ContainsKey(resource) && m_resources[resource] != Permission.None)
215 temp = m_resources[resource];
216
217 if (m_parents != null)
218 {
219 foreach (Role parent in m_parents)
220 {
221 temp = parent.RequestPermission(resource, temp);
222 }
223 }
224
225 return temp;
226 }
227
228 public void GivePermission(string resource, Permission perm)
229 {
230 m_resources[resource] = perm;
231 }
232 }
233
234 public class Resource
235 {
236 private string m_name;
237
238 public Resource(string name)
239 {
240 m_name = name;
241 }
242
243 public string Name
244 {
245 get { return m_name; }
246 }
247 }
248
249 #endregion
250
251
252} \ No newline at end of file