2 // System.Security.CodeAccessPermission.cs
5 // Miguel de Icaza (miguel@ximian.com)
6 // Nick Drochak, ndrochak@gol.com
7 // Sebastien Pouliot <sebastien@ximian.com>
9 // (C) Ximian, Inc. http://www.ximian.com
10 // Copyright (C) 2001 Nick Drochak, All Rights Reserved
11 // Portions (C) 2004 Motus Technologies Inc. (http://www.motus.com)
12 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
14 // Permission is hereby granted, free of charge, to any person obtaining
15 // a copy of this software and associated documentation files (the
16 // "Software"), to deal in the Software without restriction, including
17 // without limitation the rights to use, copy, modify, merge, publish,
18 // distribute, sublicense, and/or sell copies of the Software, and to
19 // permit persons to whom the Software is furnished to do so, subject to
20 // the following conditions:
22 // The above copyright notice and this permission notice shall be
23 // included in all copies or substantial portions of the Software.
25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
34 using System.Diagnostics;
35 using System.Globalization;
36 using System.Reflection;
37 using System.Runtime.CompilerServices;
38 using System.Runtime.InteropServices;
39 using System.Security.Permissions;
40 using System.Threading;
42 namespace System.Security {
45 [SecurityPermission (SecurityAction.InheritanceDemand, ControlEvidence = true, ControlPolicy = true)]
47 [MonoTODO ("CAS support is experimental (and unsupported).")]
48 public abstract class CodeAccessPermission : IPermission, ISecurityEncodable, IStackWalk {
51 protected CodeAccessPermission ()
56 [Conditional ("FEATURE_MONO_CAS")]
58 [MonoTODO ("CAS support is experimental (and unsupported). Imperative mode is not implemented.")]
62 new PermissionSet (this).Assert ();
65 public abstract IPermission Copy ();
68 [Conditional ("FEATURE_MONO_CAS")]
72 // note: here we're sure it's a CAS demand
73 if (!SecurityManager.SecurityEnabled)
76 // skip frames until we get the caller (of our caller)
77 new PermissionSet (this).CasOnlyDemand (3);
81 [Conditional ("FEATURE_MONO_CAS")]
83 [MonoTODO ("CAS support is experimental (and unsupported). Imperative mode is not implemented.")]
87 new PermissionSet (this).Deny ();
91 public override bool Equals (object obj)
95 if (obj.GetType () != this.GetType ())
97 CodeAccessPermission cap = (obj as CodeAccessPermission);
98 return (IsSubsetOf (cap) && cap.IsSubsetOf (this));
101 public abstract void FromXml (SecurityElement elem);
104 public override int GetHashCode ()
106 return base.GetHashCode ();
109 public abstract IPermission Intersect (IPermission target);
111 public abstract bool IsSubsetOf (IPermission target);
113 public override string ToString ()
115 SecurityElement elem = ToXml ();
116 return elem.ToString ();
119 public abstract SecurityElement ToXml ();
121 public virtual IPermission Union (IPermission other)
124 throw new System.NotSupportedException (); // other is not null.
129 [Conditional ("FEATURE_MONO_CAS")]
131 [MonoTODO ("CAS support is experimental (and unsupported). Imperative mode is not implemented.")]
133 public void PermitOnly ()
135 new PermissionSet (this).PermitOnly ();
139 [Conditional ("FEATURE_MONO_CAS")]
141 [MonoTODO ("CAS support is experimental (and unsupported). Imperative mode is not implemented.")]
143 public static void RevertAll ()
145 if (!SecurityManager.SecurityEnabled)
147 throw new NotImplementedException ();
151 [Conditional ("FEATURE_MONO_CAS")]
153 [MonoTODO ("CAS support is experimental (and unsupported). Imperative mode is not implemented.")]
155 public static void RevertAssert ()
157 if (!SecurityManager.SecurityEnabled)
159 throw new NotImplementedException ();
163 [Conditional ("FEATURE_MONO_CAS")]
165 [MonoTODO ("CAS support is experimental (and unsupported). Imperative mode is not implemented.")]
167 public static void RevertDeny ()
169 if (!SecurityManager.SecurityEnabled)
171 throw new NotImplementedException ();
175 [Conditional ("FEATURE_MONO_CAS")]
177 [MonoTODO ("CAS support is experimental (and unsupported). Imperative mode is not implemented.")]
179 public static void RevertPermitOnly ()
181 if (!SecurityManager.SecurityEnabled)
183 throw new NotImplementedException ();
186 // Internal helpers methods
188 // snippet moved from FileIOPermission (nickd) to be reused in all derived classes
189 internal SecurityElement Element (int version)
191 SecurityElement se = new SecurityElement ("IPermission");
192 Type type = this.GetType ();
193 se.AddAttribute ("class", type.FullName + ", " + type.Assembly.ToString ().Replace ('\"', '\''));
194 se.AddAttribute ("version", version.ToString ());
198 internal static PermissionState CheckPermissionState (PermissionState state, bool allowUnrestricted)
202 case PermissionState.None:
204 case PermissionState.Unrestricted:
205 // unrestricted permissions are possible for identiy permissions
208 msg = String.Format (Locale.GetText ("Invalid enum {0}"), state);
209 throw new ArgumentException (msg, "state");
214 internal static int CheckSecurityElement (SecurityElement se, string parameterName, int minimumVersion, int maximumVersion)
217 throw new ArgumentNullException (parameterName);
219 // Tag is case-sensitive
220 if (se.Tag != "IPermission") {
221 string msg = String.Format (Locale.GetText ("Invalid tag {0}"), se.Tag);
222 throw new ArgumentException (msg, parameterName);
225 // Note: we do not care about the class attribute at
226 // this stage (in fact we don't even if the class
227 // attribute is present or not). Anyway the object has
228 // already be created, with success, if we're loading it
230 // we assume minimum version if no version number is supplied
231 int version = minimumVersion;
232 string v = se.Attribute ("version");
235 version = Int32.Parse (v);
237 catch (Exception e) {
238 string msg = Locale.GetText ("Couldn't parse version from '{0}'.");
239 msg = String.Format (msg, v);
240 throw new ArgumentException (msg, parameterName, e);
244 if ((version < minimumVersion) || (version > maximumVersion)) {
245 string msg = Locale.GetText ("Unknown version '{0}', expected versions between ['{1}','{2}'].");
246 msg = String.Format (msg, version, minimumVersion, maximumVersion);
247 throw new ArgumentException (msg, parameterName);
252 // must be called after CheckSecurityElement (i.e. se != null)
253 internal static bool IsUnrestricted (SecurityElement se)
255 string value = se.Attribute ("Unrestricted");
258 return (String.Compare (value, Boolean.TrueString, true, CultureInfo.InvariantCulture) == 0);
261 internal static void ThrowInvalidPermission (IPermission target, Type expected)
263 string msg = Locale.GetText ("Invalid permission type '{0}', expected type '{1}'.");
264 msg = String.Format (msg, target.GetType (), expected);
265 throw new ArgumentException (msg, "target");
269 // Workaround for CS0629
270 void IStackWalk.Assert ()
274 void IStackWalk.Deny ()
278 void IStackWalk.PermitOnly ()
282 void IStackWalk.Demand ()
286 void IPermission.Demand ()