1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
//
// System.Security.Permissions.StorePermission class
//
// Author:
// Sebastien Pouliot <sebastien@ximian.com>
//
// Copyright (C) 2005 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System.Globalization;
namespace System.Security.Permissions {
[Serializable]
public sealed class StorePermission : CodeAccessPermission, IUnrestrictedPermission {
private const int version = 1;
private StorePermissionFlags _flags;
public StorePermission (PermissionState state)
{
if (PermissionHelper.CheckPermissionState (state, true) == PermissionState.Unrestricted)
_flags = StorePermissionFlags.AllFlags;
else
_flags = StorePermissionFlags.NoFlags;
}
public StorePermission (StorePermissionFlags flag)
{
// reuse validation by the Flags property
Flags = flag;
}
public StorePermissionFlags Flags {
get { return _flags; }
set {
if ((value != 0) && (value & StorePermissionFlags.AllFlags) == 0) {
string msg = String.Format (Locale.GetText ("Invalid enum {0}"), value);
throw new ArgumentException (msg, "StorePermissionFlags");
}
_flags = value;
}
}
public bool IsUnrestricted ()
{
return (_flags == StorePermissionFlags.AllFlags);
}
public override IPermission Copy ()
{
// buggy behaviour - affects other operations that use Copy
// reported as FDBK40928
if (_flags == StorePermissionFlags.NoFlags)
return null;
return new StorePermission (_flags);
}
public override IPermission Intersect (IPermission target)
{
StorePermission dp = Cast (target);
if (dp == null)
return null;
if (this.IsUnrestricted () && dp.IsUnrestricted ())
return new StorePermission (PermissionState.Unrestricted);
if (this.IsUnrestricted ())
return dp.Copy ();
if (dp.IsUnrestricted ())
return this.Copy ();
StorePermissionFlags spf = _flags & dp._flags;
if (spf == StorePermissionFlags.NoFlags)
return null;
return new StorePermission (spf);
}
public override IPermission Union (IPermission target)
{
StorePermission dp = Cast (target);
if (dp == null)
return this.Copy (); // will return null for NoFlags
if (this.IsUnrestricted () || dp.IsUnrestricted ())
return new StorePermission (PermissionState.Unrestricted);
StorePermissionFlags spf = _flags | dp._flags;
if (spf == StorePermissionFlags.NoFlags)
return null;
return new StorePermission (spf);
}
public override bool IsSubsetOf (IPermission target)
{
StorePermission dp = Cast (target);
if (dp == null)
return (_flags == StorePermissionFlags.NoFlags);
if (dp.IsUnrestricted ())
return true;
if (this.IsUnrestricted ())
return false;
return ((_flags & ~dp._flags) == 0);
}
public override void FromXml (SecurityElement securityElement)
{
// General validation in CodeAccessPermission
PermissionHelper.CheckSecurityElement (securityElement, "securityElement", version, version);
// Note: we do not (yet) care about the return value
// as we only accept version 1 (min/max values)
string s = securityElement.Attribute ("Flags");
if (s == null)
_flags = StorePermissionFlags.NoFlags;
else
_flags = (StorePermissionFlags) Enum.Parse (typeof (StorePermissionFlags), s);
}
public override SecurityElement ToXml ()
{
SecurityElement e = PermissionHelper.Element (typeof (StorePermission), version);
if (this.IsUnrestricted ()) {
e.AddAttribute ("Unrestricted", Boolean.TrueString);
} else {
e.AddAttribute ("Flags", _flags.ToString ());
}
return e;
}
// helpers
private StorePermission Cast (IPermission target)
{
if (target == null)
return null;
StorePermission dp = (target as StorePermission);
if (dp == null) {
PermissionHelper.ThrowInvalidPermission (target, typeof (StorePermission));
}
return dp;
}
}
}
|
