Implement MachineKey.Protect and MachineKey.Unprotect
[mono.git] / mcs / class / System / System.ComponentModel / LicFileLicenseProvider.cs
1 //
2 // System.ComponentModel.LicFileLicenseProvider.cs
3 //
4 // Authors:
5 //   Martin Willemoes Hansen (mwh@sysrq.dk)
6 //   Andreas Nahr (ClassDevelopment@A-SoftTech.com)
7 //   Lluis Sanchez Gual (lluis@ximian.com)
8 //
9 // (C) 2003 Martin Willemoes Hansen
10 // (C) 2003 Andreas Nahr
11 //
12
13 //
14 // Permission is hereby granted, free of charge, to any person obtaining
15 // a copy of this software and associated documentation files (the
16 // "Software"), to deal in the Software without restriction, including
17 // without limitation the rights to use, copy, modify, merge, publish,
18 // distribute, sublicense, and/or sell copies of the Software, and to
19 // permit persons to whom the Software is furnished to do so, subject to
20 // the following conditions:
21 // 
22 // The above copyright notice and this permission notice shall be
23 // included in all copies or substantial portions of the Software.
24 // 
25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
32 //
33
34 using System.IO;
35
36 namespace System.ComponentModel
37 {
38         public class LicFileLicenseProvider : LicenseProvider
39         {
40
41                 public LicFileLicenseProvider()
42                 {
43                 }
44
45                 public override License GetLicense (LicenseContext context,
46                                                     Type type,
47                                                     object instance,
48                                                     bool allowExceptions)
49                 {
50                         try
51                         {
52                                 if (context == null || context.UsageMode != LicenseUsageMode.Designtime)
53                                         return null;
54                         
55                                 string path = Path.GetDirectoryName (type.Assembly.Location);
56                                 path = Path.Combine (path, type.FullName + ".LIC");
57                         
58                                 if (!File.Exists (path)) return null;
59                         
60                                 StreamReader sr = new StreamReader (path);
61                                 string key = sr.ReadLine ();
62                                 sr.Close ();
63                                 
64                                 if (IsKeyValid (key, type))
65                                         return new LicFileLicense (key);
66                         }
67                         catch
68                         {
69                                 if (allowExceptions) throw;
70                         }
71                         return null;
72                 }
73
74                 protected virtual string GetKey (Type type)
75                 {
76                         return (type.FullName + " is a licensed component.");
77                 }
78
79                 protected virtual bool IsKeyValid (string key, Type type)
80                 {
81                         if (key == null)
82                                 return false;
83                         return key.Equals (GetKey (type));
84                 }
85         }
86         
87         internal class LicFileLicense: License
88         {
89                 string _key;
90                 
91                 public LicFileLicense (string key)
92                 {
93                         _key = key;
94                 }
95                 
96                 public override string LicenseKey
97                 {
98                         get { return _key; }
99                 }
100                 
101                 public override void Dispose ()
102                 {
103                 }
104         }
105 }