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) 2004-2005 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
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30 using System.Runtime.InteropServices;
33 namespace System.Security.Permissions {
37 public sealed class StrongNamePublicKeyBlob {
39 internal byte[] pubkey;
41 public StrongNamePublicKeyBlob (byte[] publicKey)
43 if (publicKey == null)
44 throw new ArgumentNullException ("publicKey");
45 // Note: No sanity check ?
49 internal static StrongNamePublicKeyBlob FromString (string s)
51 if ((s == null) || (s.Length == 0))
54 int length = s.Length / 2;
56 byte [] array = new byte [length];
58 for (int i = 0, j = 0; i < s.Length; i += 2, j ++) {
59 byte left = CharToByte (s [i]);
60 byte right = CharToByte (s [i+1]);
61 array [j] = Convert.ToByte (left * 16 + right);
64 return new StrongNamePublicKeyBlob (array);
67 static byte CharToByte (char c)
69 char ch = Char.ToLowerInvariant (c);
71 if (Char.IsDigit (ch))
72 return (byte) (ch - '0');
74 return (byte) (ch - 'a' + 10);
77 public override bool Equals (object obj)
79 StrongNamePublicKeyBlob snpkb = (obj as StrongNamePublicKeyBlob);
83 bool result = (pubkey.Length == snpkb.pubkey.Length);
85 for (int i = 0; i < pubkey.Length; i++) {
86 if (pubkey[i] != snpkb.pubkey[i])
93 // LAMESPEC: non standard get hash code - (a) Why ??? (b) How ???
94 // It seems to be the first four bytes of the public key data
95 // which seems like non sense as all valid public key will have the same header ?
96 public override int GetHashCode ()
100 // a BAD public key can be less than 4 bytes
101 int n = Math.Min (pubkey.Length, 4);
103 hash = (hash << 8) + pubkey [i++];
107 public override string ToString ()
109 StringBuilder sb = new StringBuilder ();
110 for (int i=0; i < pubkey.Length; i++)
111 sb.Append (pubkey[i].ToString ("X2"));
112 return sb.ToString ();