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
|
//
// System.Web.Configuration.MachineKeySection
//
// Authors:
// Chris Toshok (toshok@ximian.com)
//
// (c) Copyright 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;
using System.ComponentModel;
using System.Configuration;
using System.Security.Cryptography;
#if NET_2_0
namespace System.Web.Configuration {
internal static class MachineKeySectionUtils
{
static byte [] autogenerated;
static byte [] autogenerated_decrypt;
static byte[] decryption_key;
static byte[] decryption_key_192bits;
static byte[] validation_key;
internal static void AutoGenKeys ()
{
#if TARGET_J2EE
{
#else
try {
if (autogenerated == null)
autogenerated = MachineKeyRegistryStorage.Retrieve (
MachineKeyRegistryStorage.KeyType.Validation);
if (autogenerated_decrypt == null)
autogenerated_decrypt = MachineKeyRegistryStorage.Retrieve (
MachineKeyRegistryStorage.KeyType.Encryption);
} catch (Exception) {
#endif
// Fall back to old method
RandomNumberGenerator rng = RandomNumberGenerator.Create ();
if (autogenerated == null) {
autogenerated = new byte [64];
rng.GetBytes (autogenerated);
}
if (autogenerated_decrypt == null) {
autogenerated_decrypt = new byte [64];
rng.GetBytes (autogenerated_decrypt);
}
}
}
static byte ToHexValue (char c, bool high)
{
byte v;
if (c >= '0' && c <= '9')
v = (byte) (c - '0');
else if (c >= 'a' && c <= 'f')
v = (byte) (c - 'a' + 10);
else if (c >= 'A' && c <= 'F')
v = (byte) (c - 'A' + 10);
else
throw new ArgumentException ("Invalid hex character");
if (high)
v <<= 4;
return v;
}
internal static byte [] GetBytes (string key, int len)
{
byte [] result = new byte [len / 2];
for (int i = 0; i < len; i += 2)
result [i / 2] = (byte) (ToHexValue (key [i], true) + ToHexValue (key [i + 1], false));
return result;
}
static byte [] MakeKey (string key, bool decryption) //, out bool isolate)
{
if (key == null || key.StartsWith ("AutoGenerate")){
//isolate = key.IndexOf ("IsolateApps") != 1;
AutoGenKeys ();
return (decryption) ? autogenerated_decrypt : autogenerated;
}
//isolate = false;
int len = key.Length;
if (len < 40 || len > 128 || (len % 2) == 1)
throw new ArgumentException ("Invalid key length");
return GetBytes (key, len);
}
internal static void SetDecryptionKey (string n)
{
decryption_key = MakeKey (n, true); //, out isolate_decryption);
decryption_key_192bits = new byte [24];
int count = 24;
if (decryption_key.Length < 24)
count = decryption_key.Length;
Buffer.BlockCopy (decryption_key, 0, decryption_key_192bits, 0, count);
}
internal static void SetValidationKey (string n)
{
validation_key = MakeKey (n, false); //, out isolate_validation);
}
static MachineKeySection Config {
get { return WebConfigurationManager.GetSection ("system.web/machineKey") as MachineKeySection; }
}
internal static byte [] ValidationKeyBytes ()
{
return ValidationKeyBytes (Config);
}
internal static byte [] ValidationKeyBytes (MachineKeySection section)
{
if (section == null)
throw new ArgumentNullException ("section");
if (validation_key == null)
SetValidationKey (section.ValidationKey);
return validation_key;
}
internal static byte [] DecryptionKeyBytes ()
{
return DecryptionKeyBytes (Config);
}
internal static byte [] DecryptionKeyBytes (MachineKeySection section)
{
if (section == null)
throw new ArgumentNullException ("section");
if (decryption_key == null)
SetDecryptionKey (section.DecryptionKey);
return decryption_key;
}
internal static byte [] DecryptionKey192Bits ()
{
return DecryptionKey192Bits (Config);
}
internal static byte [] DecryptionKey192Bits (MachineKeySection section)
{
if (section == null)
throw new ArgumentNullException ("section");
if (decryption_key_192bits == null)
SetDecryptionKey (section.DecryptionKey);
return decryption_key_192bits;
}
}
}
#endif
|
