2 // System.Security.Permissions.SiteIdentityPermission.cs
5 // Sebastien Pouliot <sebastien@ximian.com>
7 // Copyright (C) 2003 Motus Technologies. http://www.motus.com
8 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
10 // Permission is hereby granted, free of charge, to any person obtaining
11 // a copy of this software and associated documentation files (the
12 // "Software"), to deal in the Software without restriction, including
13 // without limitation the rights to use, copy, modify, merge, publish,
14 // distribute, sublicense, and/or sell copies of the Software, and to
15 // permit persons to whom the Software is furnished to do so, subject to
16 // the following conditions:
18 // The above copyright notice and this permission notice shall be
19 // included in all copies or substantial portions of the Software.
21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
30 using System.Globalization;
31 using System.Runtime.InteropServices;
33 namespace System.Security.Permissions {
39 public sealed class SiteIdentityPermission : CodeAccessPermission, IBuiltInPermission {
41 private const int version = 1;
47 public SiteIdentityPermission (PermissionState state)
49 // false == do not allow Unrestricted for Identity Permissions
50 CheckPermissionState (state, false);
53 public SiteIdentityPermission (string site)
63 throw new NullReferenceException ("No site.");
68 throw new ArgumentException ("Invalid site.");
75 public override IPermission Copy ()
78 return new SiteIdentityPermission (PermissionState.None);
80 return new SiteIdentityPermission (_site);
83 public override void FromXml (SecurityElement esd)
85 // General validation in CodeAccessPermission
86 CheckSecurityElement (esd, "esd", version, version);
87 // Note: we do not (yet) care about the return value
88 // as we only accept version 1 (min/max values)
90 string s = esd.Attribute ("Site");
95 public override IPermission Intersect (IPermission target)
97 SiteIdentityPermission sip = Cast (target);
98 if ((sip == null) || (IsEmpty ()))
101 if (Match (sip._site)) {
102 string s = ((_site.Length > sip._site.Length) ? _site : sip._site);
103 return new SiteIdentityPermission (s);
108 public override bool IsSubsetOf (IPermission target)
110 SiteIdentityPermission sip = Cast (target);
113 if ((_site == null) && (sip._site == null))
115 if ((_site == null) || (sip._site == null))
118 int wildcard = sip._site.IndexOf ('*');
119 if (wildcard == -1) {
121 return (_site == sip._site);
123 return _site.EndsWith (sip._site.Substring (wildcard + 1));
126 public override SecurityElement ToXml ()
128 SecurityElement e = Element (version);
130 e.AddAttribute ("Site", _site);
134 public override IPermission Union (IPermission target)
136 SiteIdentityPermission sip = Cast (target);
137 if ((sip == null) || sip.IsEmpty ())
142 if (Match (sip._site)) {
143 string s = ((_site.Length < sip._site.Length) ? _site : sip._site);
144 return new SiteIdentityPermission (s);
147 throw new ArgumentException (Locale.GetText (
148 "Cannot union two different sites."), "target");
154 // IBuiltInPermission
155 int IBuiltInPermission.GetTokenIndex ()
157 return (int) BuiltInToken.SiteIdentity;
162 private bool IsEmpty ()
164 return (_site == null);
167 private SiteIdentityPermission Cast (IPermission target)
172 SiteIdentityPermission sip = (target as SiteIdentityPermission);
174 ThrowInvalidPermission (target, typeof (SiteIdentityPermission));
180 private static bool[] valid = new bool [94] {
181 /* 33 */ true, false, true, true, true, true, true, true, true, true,
182 /* 43 */ false, false, true, true, false, true, true, true, true, true,
183 /* 53 */ true, true, true, true, false, false, false, false, false, false,
184 /* 63 */ false, true, true, true, true, true, true, true, true, true,
185 /* 73 */ true, true, true, true, true, true, true, true, true, true,
186 /* 83 */ true, true, true, true, true, true, true, true, false, false,
187 /* 93 */ false, true, true, false, true, true, true, true, true, true,
188 /* 103 */ true, true, true, true, true, true, true, true, true, true,
189 /* 113 */ true, true, true, true, true, true, true, true, true, true,
190 /* 123 */ true, false, true, true
193 private bool IsValid (string s)
195 if ((s == null) || (s.Length == 0))
198 for (int i = 0; i < s.Length; i++) {
199 ushort x = (ushort) s [i];
200 if ((x < 33) || (x > 126)) {
204 // special case for wildcards (*)
205 // must be alone or first and followed by a dot
206 if ((s.Length > 1) && ((s [i + 1] != '.') || (i > 0)))
209 if (!valid [x - 33]) {
214 // a lone dot isn't valid
216 return (s [0] != '.');
220 private bool Match (string target)
222 if ((_site == null) || (target == null))
225 int wcs = _site.IndexOf ('*');
226 int wct = target.IndexOf ('*');
228 if ((wcs == -1) && (wct == -1)) {
229 // no wildcard, this is an exact match
230 return (_site == target);
232 else if (wcs == -1) {
233 // only "target" has a wildcard, use it
234 return _site.EndsWith (target.Substring (wct + 1));
236 else if (wct == -1) {
237 // only "this" has a wildcard, use it
238 return target.EndsWith (_site.Substring (wcs + 1));
241 // both have wildcards, partial match with the smallest
242 string s = _site.Substring (wcs + 1);
243 target = target.Substring (wct + 1);
244 if (s.Length > target.Length)
245 return s.EndsWith (target);
247 return target.EndsWith (s);