Parsing strong name signatures generated with sn.exe

//------------------------------------------------------------------------
// (c) 2002-2004 by Per Anderson.  All rights reserved.
//------------------------------------------------------------------------

using System;
using System.IO;
using System.Text;
using System.Xml; 
using System.Reflection;
using System.Security.Cryptography; 
using System.Collections;



namespace Bullfrog.Compress.RSA
{
	public class Signer : Validator 
	{

		public Signer() : base()
		{
		}


		public Signer(string xmlkey) : base(xmlkey)
		{			
		}

		public Signer(byte[] snkbuf) : base(snkbuf)
		{
		}


		
		protected RSAPKCS1SignatureFormatter _fmt = null; 
		protected RSAPKCS1SignatureFormatter Fmt 
		{
			get
			{
				if (_fmt == null)
				{
					_fmt = new RSAPKCS1SignatureFormatter(RSA); 
					_fmt.SetHashAlgorithm("SHA1"); 
				}
				return _fmt; 
			}
		}


		public override void SetKey(AsymmetricAlgorithm key)
		{
			base.SetKey(key); 
			Fmt.SetKey(key); 
		}


		public byte[] SignToBytes(string str_orig)
		{
			byte[] orig = PlainTextToByte(str_orig); 			
			return SignToBytes(orig); 			
		}

		public byte[] SignToBytes(byte[] orig)
		{
			if (_rsa == null) return null; 							
			if ((orig == null) || (orig.Length < 1)) 
				return null;
			
			byte[] hash = SHA.ComputeHash(orig, 0, orig.Length); 			
			return Fmt.CreateSignature(hash); 
		}

		public string SignToString(string str_orig)
		{
			byte[] orig = PlainTextToByte(str_orig); 			
			return SignToString(orig); 
		}

		public string SignToString(byte[] orig)
		{
			byte[] signed = SignToBytes(orig); 
			string ret = ByteToBase64String(signed); 
			return ret; 
		}
		

	}


}