117 lines
3.2 KiB
C#
117 lines
3.2 KiB
C#
//
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// StrongNamePublicKeyBlob.cs: Strong Name Public Key Blob
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//
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// Author:
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// Sebastien Pouliot <sebastien@ximian.com>
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//
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// (C) 2002 Motus Technologies Inc. (http://www.motus.com)
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// Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System.Runtime.InteropServices;
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using System.Text;
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namespace System.Security.Permissions {
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[ComVisible (true)]
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[Serializable]
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public sealed class StrongNamePublicKeyBlob {
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internal byte[] pubkey;
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public StrongNamePublicKeyBlob (byte[] publicKey)
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{
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if (publicKey == null)
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throw new ArgumentNullException ("publicKey");
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// Note: No sanity check ?
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pubkey = publicKey;
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}
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internal static StrongNamePublicKeyBlob FromString (string s)
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{
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if ((s == null) || (s.Length == 0))
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return null;
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int length = s.Length / 2;
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byte [] array = new byte [length];
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for (int i = 0, j = 0; i < s.Length; i += 2, j ++) {
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byte left = CharToByte (s [i]);
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byte right = CharToByte (s [i+1]);
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array [j] = Convert.ToByte (left * 16 + right);
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}
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return new StrongNamePublicKeyBlob (array);
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}
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static byte CharToByte (char c)
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{
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char ch = Char.ToLowerInvariant (c);
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if (Char.IsDigit (ch))
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return (byte) (ch - '0');
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else
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return (byte) (ch - 'a' + 10);
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}
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public override bool Equals (object obj)
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{
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StrongNamePublicKeyBlob snpkb = (obj as StrongNamePublicKeyBlob);
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if (snpkb == null)
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return false;
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bool result = (pubkey.Length == snpkb.pubkey.Length);
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if (result) {
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for (int i = 0; i < pubkey.Length; i++) {
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if (pubkey[i] != snpkb.pubkey[i])
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return false;
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}
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}
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return result;
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}
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// LAMESPEC: non standard get hash code - (a) Why ??? (b) How ???
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// It seems to be the first four bytes of the public key data
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// which seems like non sense as all valid public key will have the same header ?
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public override int GetHashCode ()
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{
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int hash = 0;
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int i = 0;
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// a BAD public key can be less than 4 bytes
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int n = Math.Min (pubkey.Length, 4);
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while (i < n)
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hash = (hash << 8) + pubkey [i++];
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return hash;
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}
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public override string ToString ()
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{
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StringBuilder sb = new StringBuilder ();
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for (int i=0; i < pubkey.Length; i++)
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sb.Append (pubkey[i].ToString ("X2"));
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return sb.ToString ();
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}
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}
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}
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