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
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
|
//
// System.Security.Permissions.RegistryPermission.cs
//
// Author
// Sebastien Pouliot <sebastien@ximian.com>
//
// Copyright (C) 2003 Motus Technologies. http://www.motus.com
// Copyright (C) 2004 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.Collections;
using System.Globalization;
using System.Text;
#if NET_2_0
using System.Security.AccessControl;
#endif
namespace System.Security.Permissions {
[Serializable]
public sealed class RegistryPermission
: CodeAccessPermission, IUnrestrictedPermission, IBuiltInPermission {
private const int version = 1;
private PermissionState _state;
private RegistryPermissionAccess _access;
private ArrayList createList;
private ArrayList readList;
private ArrayList writeList;
#if NET_2_0
private AccessControlActions _control;
#endif
// Constructors
public RegistryPermission (PermissionState state)
{
_state = CheckPermissionState (state, true);
createList = new ArrayList ();
readList = new ArrayList ();
writeList = new ArrayList ();
}
public RegistryPermission (RegistryPermissionAccess access, string pathList)
{
_state = PermissionState.None;
createList = new ArrayList ();
readList = new ArrayList ();
writeList = new ArrayList ();
AddPathList (access, pathList);
}
#if NET_2_0
public RegistryPermission (RegistryPermissionAccess access, AccessControlActions control, string pathList)
{
if (!Enum.IsDefined (typeof (AccessControlActions), control)) {
string msg = String.Format (Locale.GetText ("Invalid enum {0}"), control);
throw new ArgumentException (msg, "AccessControlActions");
}
_state = PermissionState.None;
AddPathList (access, control, pathList);
}
#endif
// Properties
// Methods
public void AddPathList (RegistryPermissionAccess access, string pathList)
{
if (pathList == null)
throw new ArgumentNullException ("pathList");
switch (access) {
case RegistryPermissionAccess.AllAccess:
AddWithUnionKey (createList, pathList);
AddWithUnionKey (readList, pathList);
AddWithUnionKey (writeList, pathList);
break;
case RegistryPermissionAccess.NoAccess:
// ??? unit tests doesn't show removal using NoAccess ???
break;
case RegistryPermissionAccess.Create:
AddWithUnionKey (createList, pathList);
break;
case RegistryPermissionAccess.Read:
AddWithUnionKey (readList, pathList);
break;
case RegistryPermissionAccess.Write:
AddWithUnionKey (writeList, pathList);
break;
default:
ThrowInvalidFlag (access, false);
break;
}
}
#if NET_2_0
[MonoTODO ("Access Control isn't implemented")]
public void AddPathList (RegistryPermissionAccess access, AccessControlActions control, string pathList)
{
throw new NotImplementedException ();
}
#endif
public string GetPathList (RegistryPermissionAccess access)
{
switch (access) {
case RegistryPermissionAccess.AllAccess:
case RegistryPermissionAccess.NoAccess:
ThrowInvalidFlag (access, true);
break;
case RegistryPermissionAccess.Create:
return GetPathList (createList);
case RegistryPermissionAccess.Read:
return GetPathList (readList);
case RegistryPermissionAccess.Write:
return GetPathList (writeList);
default:
ThrowInvalidFlag (access, false);
break;
}
return null; // never reached
}
public void SetPathList (RegistryPermissionAccess access, string pathList)
{
if (pathList == null)
throw new ArgumentNullException ("pathList");
string[] paths;
switch (access) {
case RegistryPermissionAccess.AllAccess:
createList.Clear ();
readList.Clear ();
writeList.Clear ();
paths = pathList.Split (';');
foreach (string path in paths) {
createList.Add (path);
readList.Add (path);
writeList.Add (path);
}
break;
case RegistryPermissionAccess.NoAccess:
// ??? unit tests doesn't show removal using NoAccess ???
break;
case RegistryPermissionAccess.Create:
createList.Clear ();
paths = pathList.Split (';');
foreach (string path in paths) {
createList.Add (path);
}
break;
case RegistryPermissionAccess.Read:
readList.Clear ();
paths = pathList.Split (';');
foreach (string path in paths) {
readList.Add (path);
}
break;
case RegistryPermissionAccess.Write:
writeList.Clear ();
paths = pathList.Split (';');
foreach (string path in paths) {
writeList.Add (path);
}
break;
default:
ThrowInvalidFlag (access, false);
break;
}
}
public override IPermission Copy ()
{
RegistryPermission rp = new RegistryPermission (_state);
string path = GetPathList (RegistryPermissionAccess.Create);
if (path != null)
rp.SetPathList (RegistryPermissionAccess.Create, path);
path = GetPathList (RegistryPermissionAccess.Read);
if (path != null)
rp.SetPathList (RegistryPermissionAccess.Read, path);
path = GetPathList (RegistryPermissionAccess.Write);
if (path != null)
rp.SetPathList (RegistryPermissionAccess.Write, path);
return rp;
}
public override void FromXml (SecurityElement esd)
{
// General validation in CodeAccessPermission
CheckSecurityElement (esd, "esd", version, version);
// Note: we do not (yet) care about the return value
// as we only accept version 1 (min/max values)
// General validation in CodeAccessPermission
CheckSecurityElement (esd, "esd", version, version);
// Note: we do not (yet) care about the return value
// as we only accept version 1 (min/max values)
if (IsUnrestricted (esd))
_state = PermissionState.Unrestricted;
string create = esd.Attribute ("Create");
if ((create != null) && (create.Length > 0))
SetPathList (RegistryPermissionAccess.Create, create);
string read = esd.Attribute ("Read");
if ((read != null) && (read.Length > 0))
SetPathList (RegistryPermissionAccess.Read, read);
string write = esd.Attribute ("Write");
if ((write != null) && (write.Length > 0))
SetPathList (RegistryPermissionAccess.Write, write);
}
public override IPermission Intersect (IPermission target)
{
RegistryPermission rp = Cast (target);
if (rp == null)
return null;
if (IsUnrestricted ())
return rp.Copy ();
if (rp.IsUnrestricted ())
return Copy ();
RegistryPermission result = new RegistryPermission (PermissionState.None);
IntersectKeys (createList, rp.createList, result.createList);
IntersectKeys (readList, rp.readList, result.readList);
IntersectKeys (writeList, rp.writeList, result.writeList);
return (result.IsEmpty () ? null : result);
}
public override bool IsSubsetOf (IPermission target)
{
RegistryPermission rp = Cast (target);
if (rp == null)
return false;
if (rp.IsEmpty ())
return IsEmpty ();
if (IsUnrestricted ())
return rp.IsUnrestricted ();
else if (rp.IsUnrestricted ())
return true;
if (!KeyIsSubsetOf (createList, rp.createList))
return false;
if (!KeyIsSubsetOf (readList, rp.readList))
return false;
if (!KeyIsSubsetOf (writeList, rp.writeList))
return false;
return true;
}
public bool IsUnrestricted ()
{
return (_state == PermissionState.Unrestricted);
}
public override SecurityElement ToXml ()
{
SecurityElement se = Element (version);
if (_state == PermissionState.Unrestricted) {
se.AddAttribute ("Unrestricted", "true");
}
else {
string path = GetPathList (RegistryPermissionAccess.Create);
if (path != null)
se.AddAttribute ("Create", path);
path = GetPathList (RegistryPermissionAccess.Read);
if (path != null)
se.AddAttribute ("Read", path);
path = GetPathList (RegistryPermissionAccess.Write);
if (path != null)
se.AddAttribute ("Write", path);
}
return se;
}
public override IPermission Union (IPermission target)
{
RegistryPermission rp = Cast (target);
if (rp == null)
return Copy ();
if (IsUnrestricted () || rp.IsUnrestricted ())
return new RegistryPermission (PermissionState.Unrestricted);
if (IsEmpty () && rp.IsEmpty ())
return null;
RegistryPermission result = (RegistryPermission) Copy ();
string path = rp.GetPathList (RegistryPermissionAccess.Create);
if (path != null)
result.AddPathList (RegistryPermissionAccess.Create, path);
path = rp.GetPathList (RegistryPermissionAccess.Read);
if (path != null)
result.AddPathList (RegistryPermissionAccess.Read, path);
path = rp.GetPathList (RegistryPermissionAccess.Write);
if (path != null)
result.AddPathList (RegistryPermissionAccess.Write, path);
return result;
}
// IBuiltInPermission
int IBuiltInPermission.GetTokenIndex ()
{
return (int) BuiltInToken.Registry;
}
// helpers
private bool IsEmpty ()
{
return ((_state == PermissionState.None) && (createList.Count == 0) &&
(readList.Count == 0) && (writeList.Count == 0));
}
private RegistryPermission Cast (IPermission target)
{
if (target == null)
return null;
RegistryPermission rp = (target as RegistryPermission);
if (rp == null) {
ThrowInvalidPermission (target, typeof (RegistryPermission));
}
return rp;
}
internal void ThrowInvalidFlag (RegistryPermissionAccess flag, bool context)
{
string msg = null;
if (context)
msg = Locale.GetText ("Unknown flag '{0}'.");
else
msg = Locale.GetText ("Invalid flag '{0}' in this context.");
throw new ArgumentException (String.Format (msg, flag), "flag");
}
private string GetPathList (ArrayList list)
{
if (IsUnrestricted ())
return String.Empty;
#if NET_2_0
if (list.Count == 0)
return String.Empty;
#else
if (list.Count == 0)
return null;
#endif
StringBuilder sb = new StringBuilder ();
foreach (string path in list) {
sb.Append (path);
sb.Append (";");
}
string result = sb.ToString ();
// remove last ';'
int n = result.Length;
if (n > 0)
return result.Substring (0, n - 1);
#if NET_2_0
return String.Empty;
#else
return ((_state == PermissionState.Unrestricted) ? String.Empty : null);
#endif
}
internal bool KeyIsSubsetOf (IList local, IList target)
{
bool result = false;
foreach (string l in local) {
foreach (string t in target) {
if (l.StartsWith (t)) {
result = true;
break;
}
}
if (!result)
return false;
}
return true;
}
internal void AddWithUnionKey (IList list, string pathList)
{
string[] paths = pathList.Split (';');
foreach (string path in paths) {
int len = list.Count;
if (len == 0) {
list.Add (path);
}
else {
for (int i=0; i < len; i++) {
string s = (string) list [i];
if (s.StartsWith (path)) {
// replace (with reduced version)
list [i] = path;
}
else if (path.StartsWith (s)) {
// no need to add
}
else {
list.Add (path);
}
}
}
}
}
internal void IntersectKeys (IList local, IList target, IList result)
{
foreach (string l in local) {
foreach (string t in target) {
if (t.Length > l.Length) {
if (t.StartsWith (l))
result.Add (t);
}
else {
if (l.StartsWith (t))
result.Add (l);
}
}
}
}
}
}
|