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//
// StrongNamePublicKeyBlob.cs: Strong Name Public Key Blob
//
// Author:
// Sebastien Pouliot <sebastien@ximian.com>
//
// (C) 2002 Motus Technologies Inc. (http://www.motus.com)
// Copyright (C) 2004-2005 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.Runtime.InteropServices;
using System.Text;
namespace System.Security.Permissions {
#if NET_2_0
[ComVisible (true)]
#endif
[Serializable]
public sealed class StrongNamePublicKeyBlob {
internal byte[] pubkey;
public StrongNamePublicKeyBlob (byte[] publicKey)
{
if (publicKey == null)
throw new ArgumentNullException ("publicKey");
// Note: No sanity check ?
pubkey = publicKey;
}
internal static StrongNamePublicKeyBlob FromString (string s)
{
if ((s == null) || (s.Length == 0))
return null;
int length = s.Length / 2;
byte [] array = new byte [length];
for (int i = 0, j = 0; i < s.Length; i += 2, j ++) {
byte left = CharToByte (s [i]);
byte right = CharToByte (s [i+1]);
array [j] = Convert.ToByte (left * 16 + right);
}
return new StrongNamePublicKeyBlob (array);
}
static byte CharToByte (char c)
{
char ch = Char.ToLowerInvariant (c);
if (Char.IsDigit (ch))
return (byte) (ch - '0');
else
return (byte) (ch - 'a' + 10);
}
public override bool Equals (object obj)
{
bool result = (obj is StrongNamePublicKeyBlob);
if (result) {
StrongNamePublicKeyBlob snpkb = (obj as StrongNamePublicKeyBlob);
result = (pubkey.Length == snpkb.pubkey.Length);
if (result) {
for (int i = 0; i < pubkey.Length; i++) {
if (pubkey[i] != snpkb.pubkey[i])
return false;
}
}
}
return result;
}
// LAMESPEC: non standard get hash code - (a) Why ??? (b) How ???
// It seems to be the first four bytes of the public key data
// which seems like non sense as all valid public key will have the same header ?
public override int GetHashCode ()
{
int hash = 0;
int i = 0;
// a BAD public key can be less than 4 bytes
int n = Math.Min (pubkey.Length, 4);
while (i < n)
hash = (hash << 8) + pubkey [i++];
return hash;
}
public override string ToString ()
{
StringBuilder sb = new StringBuilder ();
for (int i=0; i < pubkey.Length; i++)
sb.Append (pubkey[i].ToString ("X2"));
return sb.ToString ();
}
}
}
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