//
// OpenVPN Administrator
//
// Author(s): Everaldo Canuto <everaldo@simios.org>
//
// (C) 2006 Everaldo Canuto <everaldo@simios.org>
// (C) 2006 The Gang <www.the-gang.net>
// 
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
// 
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
// 
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//

using System;
using System.IO;
using System.Collections;
using System.Collections.Specialized;
using System.Text.RegularExpressions;

namespace OpenVPN.Admin
{
	public class CertificationInfo
	{
	
		#region Fields
		
		private bool empty;
		private string name;
		private string mail;
		private string city;
		private string state;
		private string country;
		private string organization;
		private string organizationUnit;
		private string expiration;
		private string serial;
		
		#endregion
		
		#region Constructors and destructors
		
		public CertificationInfo(string filename)
		{
			string line; 
			string sub = "";
			string exp = "";
			string ser = "";
			
			this.empty            = true;
			this.name             = "";
			this.mail             = "";
			this.city             = "";
			this.state            = "";
			this.country          = "";
			this.organization     = "";
			this.organizationUnit = "";
			this.expiration       = "";
			this.serial           = "";

			if (File.Exists(filename))
			{
				StreamReader SR = File.OpenText(filename);
				try
				{
					line = SR.ReadLine();
					while (line != null)
					{
						line = line.Trim();
						if (line.StartsWith("Subject:"))
						{
							sub = line;
						}
						else if (line.StartsWith("Not After :"))
						{
							exp = line;
						}
						else if (line.StartsWith("serial:"))
						{
							ser = line;
						}
						line = SR.ReadLine();
					}
				}
				finally
				{
					SR.Close();
				}
				
				if (sub != "")
				{
					try
					{
						this.empty            = false;
						this.name             = Regex.Match(sub, @"CN=(.*)\/").Groups[1].Value;
						this.mail             = GetParamByName(sub, "emailAddress");
						this.city             = GetParamByName(sub, "L");
						this.state            = GetParamByName(sub, "ST");
						this.country          = GetParamByName(sub, "C");
						this.organization     = GetParamByName(sub, "O");
						this.organizationUnit = GetParamByName(sub, "OU");
					} 
					catch {}
				}
				
				if (exp != "")
				{
					this.expiration = Regex.Match(exp, @"Not After :(.*)").Groups[1].Value.Trim();
				}

				if (ser != "")
				{
					this.serial = Regex.Match(ser, @"serial:(.*)").Groups[1].Value.Trim();
				}
			}
		}
		
		// To fix problem inregular expression, must be change it.
		// Need to chech how get char only unitl found "," or " " or end of line. 
		private string GetParamByName(string text, string search)
		{
			// Subject: C=XX, ST=XX, O=Secure-Server-OpenVPN, OU=Consulting, 
			// CN=John Doe/emailAddress=john@doe.com

			string result = Regex.Match(text, search+@"=(.*)").Groups[1].Value;
		
			int index = result.IndexOf(",");
			result = (index > 0) ? result.Substring(0, index) : result;
			
			return result;
		}
		
		#endregion
		
		#region Properties
		
		public bool Empty
		{ 
			get { return this.empty; } 
		}

		public string Name
		{ 
			get { return this.name; } 
		}
		
		public string Mail  
		{ 
			get { return this.mail; } 
		}
		
		public string City 
		{ 
			get { return this.city; } 
		}
		
		public string State 
		{ 
			get { return this.state; } 
		}
		
		public string Country 
		{ 
			get { return this.country; } 
		}
		
		public string Organization 
		{ 
			get { return this.organization; } 
		}
		
		public string OrganizationUnit 
		{ 
			get { return this.organizationUnit; } 
		}

		public string Expiration 
		{ 
			get { return this.expiration; } 
		}

		public string Serial
		{ 
			get { return this.serial; } 
		}

		#endregion
	}
	
}