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
|
//
// System.Security.AccessControl.GenericSecurityDescriptor implementation
//
// Author:
// Dick Porter <dick@ximian.com>
// Kenneth Bell
//
// Copyright (C) 2006 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;
using System.Security.Principal;
using System.Text;
namespace System.Security.AccessControl {
public abstract class GenericSecurityDescriptor {
protected GenericSecurityDescriptor ()
{
}
public int BinaryLength {
get {
int len = 0x14;
if (Owner != null)
len += Owner.BinaryLength;
if (Group != null)
len += Group.BinaryLength;
if (DaclPresent && !DaclIsUnmodifiedAefa)
len += InternalDacl.BinaryLength;
if (SaclPresent)
len += InternalSacl.BinaryLength;
return len;
}
}
public abstract ControlFlags ControlFlags { get; }
public abstract SecurityIdentifier Group { get; set; }
public abstract SecurityIdentifier Owner { get; set; }
public static byte Revision {
get { return 1; }
}
internal virtual GenericAcl InternalDacl {
get { return null; }
}
internal virtual GenericAcl InternalSacl {
get { return null; }
}
internal virtual byte InternalReservedField {
get { return 0; }
}
public void GetBinaryForm (byte[] binaryForm, int offset)
{
if (null == binaryForm)
throw new ArgumentNullException ("binaryForm");
int binaryLength = BinaryLength;
if (offset < 0 || offset > binaryForm.Length - binaryLength)
throw new ArgumentOutOfRangeException ("offset");
ControlFlags controlFlags = ControlFlags;
if (DaclIsUnmodifiedAefa) { controlFlags &= ~ControlFlags.DiscretionaryAclPresent; }
binaryForm[offset + 0x00] = Revision;
binaryForm[offset + 0x01] = InternalReservedField;
WriteUShort ((ushort)controlFlags, binaryForm,
offset + 0x02);
// Skip 'offset' fields (will fill later)
int pos = 0x14;
if (Owner != null) {
WriteInt (pos, binaryForm, offset + 0x04);
Owner.GetBinaryForm (binaryForm, offset + pos);
pos += Owner.BinaryLength;
} else {
WriteInt (0, binaryForm, offset + 0x04);
}
if (Group != null) {
WriteInt (pos, binaryForm, offset + 0x08);
Group.GetBinaryForm (binaryForm, offset + pos);
pos += Group.BinaryLength;
} else {
WriteInt (0, binaryForm, offset + 0x08);
}
GenericAcl sysAcl = InternalSacl;
if (SaclPresent) {
WriteInt (pos, binaryForm, offset + 0x0C);
sysAcl.GetBinaryForm (binaryForm, offset + pos);
pos += InternalSacl.BinaryLength;
} else {
WriteInt (0, binaryForm, offset + 0x0C);
}
GenericAcl discAcl = InternalDacl;
if (DaclPresent && !DaclIsUnmodifiedAefa) {
WriteInt (pos, binaryForm, offset + 0x10);
discAcl.GetBinaryForm (binaryForm, offset + pos);
pos += InternalDacl.BinaryLength;
} else {
WriteInt (0, binaryForm, offset + 0x10);
}
}
public string GetSddlForm (AccessControlSections includeSections)
{
StringBuilder result = new StringBuilder ();
if ((includeSections & AccessControlSections.Owner) != 0
&& Owner != null) {
result.AppendFormat (
CultureInfo.InvariantCulture,
"O:{0}", Owner.GetSddlForm ());
}
if ((includeSections & AccessControlSections.Group) != 0
&& Group != null) {
result.AppendFormat (
CultureInfo.InvariantCulture,
"G:{0}", Group.GetSddlForm ());
}
if ((includeSections & AccessControlSections.Access) != 0
&& DaclPresent && !DaclIsUnmodifiedAefa) {
result.AppendFormat (
CultureInfo.InvariantCulture,
"D:{0}",
InternalDacl.GetSddlForm (ControlFlags,
true));
}
if ((includeSections & AccessControlSections.Audit) != 0
&& SaclPresent) {
result.AppendFormat (
CultureInfo.InvariantCulture,
"S:{0}",
InternalSacl.GetSddlForm (ControlFlags,
false));
}
return result.ToString ();
}
public static bool IsSddlConversionSupported ()
{
return true;
}
// See CommonSecurityDescriptor constructor regarding this persistence detail.
internal virtual bool DaclIsUnmodifiedAefa {
get { return false; }
}
bool DaclPresent {
get {
return InternalDacl != null
&& (ControlFlags & ControlFlags.DiscretionaryAclPresent) != 0;
}
}
bool SaclPresent {
get {
return InternalSacl != null
&& (ControlFlags & ControlFlags.SystemAclPresent) != 0;
}
}
void WriteUShort (ushort val, byte[] buffer, int offset)
{
buffer[offset] = (byte)val;
buffer[offset + 1] = (byte)(val >> 8);
}
void WriteInt (int val, byte[] buffer, int offset)
{
buffer[offset] = (byte)val;
buffer[offset + 1] = (byte)(val >> 8);
buffer[offset + 2] = (byte)(val >> 16);
buffer[offset + 3] = (byte)(val >> 24);
}
}
}
|
