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;
using System.ComponentModel;



namespace Bullfrog.Compress.RSA
{

	

	public class Validator : RSA1024Util 
	{

		public Validator() : base()
		{
		}



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

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


	
		protected RSAPKCS1SignatureDeformatter _defmt = null; 
		protected RSAPKCS1SignatureDeformatter Defmt 
		{
			get
			{
				if (_defmt == null)
				{
					_defmt = new RSAPKCS1SignatureDeformatter(RSA); 
					_defmt.SetHashAlgorithm("SHA1"); 
				}
				return _defmt; 
			}
		}


		public virtual void SetKey(AsymmetricAlgorithm key)
		{
			Defmt.SetKey(key); 
		}


		public bool VerifySignature(string str_orig, byte[] signed)
		{
			if (_rsa == null) 
				return false; 
			
			byte[] orig = PlainTextToByte(str_orig); 			
			return VerifySignature(orig, signed); 			
		}

		public bool VerifySignature(string str_orig, string str_signed)
		{
			if (_rsa == null) 
				return false; 
			
			byte[] orig = PlainTextToByte(str_orig); 
			byte[] signed = Base64StringToByte(str_signed); 			
			return VerifySignature(orig, signed); 
		}

		public bool VerifySignature(byte[] orig, byte[] signed)
		{
			if (_rsa == null) 
				return false; 

			if ((orig == null) || (orig.Length < 1)) return false;
			if ((signed == null) || (signed.Length < 1)) return false; 

			byte[] hash = SHA.ComputeHash(orig, 0, orig.Length);
			return Defmt.VerifySignature(hash, signed); 			
		}

	
	}

	
}