2 // System.Security.PermissionBuilder.cs
5 // Sebastien Pouliot <sebastien@ximian.com>
7 // Copyright (C) 2005 Novell, Inc (http://www.novell.com)
9 // Permission is hereby granted, free of charge, to any person obtaining
10 // a copy of this software and associated documentation files (the
11 // "Software"), to deal in the Software without restriction, including
12 // without limitation the rights to use, copy, modify, merge, publish,
13 // distribute, sublicense, and/or sell copies of the Software, and to
14 // permit persons to whom the Software is furnished to do so, subject to
15 // the following conditions:
17 // The above copyright notice and this permission notice shall be
18 // included in all copies or substantial portions of the Software.
20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
29 using System.Security.Permissions;
31 namespace System.Security {
34 internal static class PermissionBuilder {
36 internal class PermissionBuilder {
38 private static object[] psNone = new object [1] { PermissionState.None };
40 // can be used to create an empty or an unrestricted permission from any valid type
41 static public IPermission Create (string fullname, PermissionState state)
44 throw new ArgumentNullException ("fullname");
46 SecurityElement se = new SecurityElement ("IPermission");
47 se.AddAttribute ("class", fullname);
48 se.AddAttribute ("version", "1");
49 if (state == PermissionState.Unrestricted)
50 se.AddAttribute ("Unrestricted", "true");
52 return CreatePermission (fullname, se);
55 static public IPermission Create (SecurityElement se)
58 throw new ArgumentNullException ("se");
60 string className = se.Attribute ("class");
61 if ((className == null) || (className.Length == 0))
62 throw new ArgumentException ("class");
64 return CreatePermission (className, se);
67 // to use in case where the "class" attribute isn't a fully qualified class name
68 static public IPermission Create (string fullname, SecurityElement se)
71 throw new ArgumentNullException ("fullname");
73 throw new ArgumentNullException ("se");
75 return CreatePermission (fullname, se);
80 internal static IPermission CreatePermission (string fullname, SecurityElement se)
82 Type classType = GetUnifiedType (fullname);
83 if (classType == null) {
84 string msg = Locale.GetText ("Can't create an instance of permission class {0}.");
86 throw new TypeLoadException (String.Format (msg, fullname));
88 throw new ArgumentException (String.Format (msg, fullname));
92 IPermission p = (IPermission) Activator.CreateInstance (classType, psNone);
97 // http://blogs.msdn.com/shawnfa/archive/2004/08/05/209320.aspx
98 static internal Type GetUnifiedType (string fullname)
100 // ensure that permission signed with ECMA or MS "final" key gets unified
101 if (fullname.EndsWith (", PublicKeyToken=b03f5f7f11d50a3a") ||
102 fullname.EndsWith (", PublicKeyToken=b77a5c561934e089")) {
103 // public key token match, check versions
105 if (fullname.IndexOf (", Version=2.0.0.0, ") < 0)
106 fullname = Unify (fullname, "2.0.0.0");
108 if (fullname.IndexOf (", Version=1.0.5000.0, ") < 0)
109 fullname = Unify (fullname, "1.0.5000.0");
113 return Type.GetType (fullname);
116 static internal string Unify (string fullname, string version)
118 int vs = fullname.IndexOf (", Version=");
119 int ve = fullname.IndexOf (",", vs + 10);
120 return fullname.Substring (0, vs + 10) + version + fullname.Substring (ve);