2 // StrongNamePublicKeyBlob.cs: Strong Name Public Key Blob
5 // Sebastien Pouliot <sebastien@ximian.com>
7 // (C) 2002 Motus Technologies Inc. (http://www.motus.com)
8 // Copyright (C) 2004 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.
33 namespace System.Security.Permissions {
36 public sealed class StrongNamePublicKeyBlob {
38 internal byte[] pubkey;
40 public StrongNamePublicKeyBlob (byte[] publicKey)
42 if (publicKey == null)
43 throw new ArgumentNullException ("publicKey");
44 // Note: No sanity check ?
48 internal static StrongNamePublicKeyBlob FromString (string s)
50 if ((s == null) || (s.Length == 0))
53 int length = s.Length / 2;
55 byte [] array = new byte [length];
57 for (int i = 0, j = 0; i < s.Length; i += 2, j ++) {
58 byte left = CharToByte (s [i]);
59 byte right = CharToByte (s [i+1]);
60 array [j] = Convert.ToByte (left * 16 + right);
63 return new StrongNamePublicKeyBlob (array);
66 static byte CharToByte (char c)
68 char ch = Char.ToLowerInvariant (c);
70 if (Char.IsDigit (ch))
71 return (byte) (ch - '0');
73 return (byte) (ch - 'a' + 10);
76 public override bool Equals (object obj)
78 bool result = (obj is StrongNamePublicKeyBlob);
80 StrongNamePublicKeyBlob snpkb = (obj as StrongNamePublicKeyBlob);
81 result = (pubkey.Length == snpkb.pubkey.Length);
83 for (int i = 0; i < pubkey.Length; i++) {
84 if (pubkey[i] != snpkb.pubkey[i])
92 // LAMESPEC: non standard get hash code - (a) Why ??? (b) How ???
93 // It seems to be the first four bytes of the public key data
94 // which seems like non sense as all valid public key will have the same header ?
95 public override int GetHashCode ()
99 // a BAD public key can be less than 4 bytes
100 int n = Math.Min (pubkey.Length, 4);
102 hash = (hash << 8) + pubkey [i++];
106 public override string ToString ()
108 StringBuilder sb = new StringBuilder ();
109 for (int i=0; i < pubkey.Length; i++)
110 sb.Append (pubkey[i].ToString ("X2"));
111 return sb.ToString ();