using System;
using System.Collections.Generic;
using System.Text;
using Org.BouncyCastle.Crypto;
using iTextSharp.text.pdf;
using Org.BouncyCastle.Pkcs;
using System.IO;
using Spring.Core.IO;

namespace Sleis.Pdf
{

    public class SimpleCert
    {
        public AsymmetricKeyParameter Akp { get; private set; }
        public Org.BouncyCastle.X509.X509Certificate[] Chain { get; private set; }

        public SimpleCert(IResource res, string password)
        {
            if (res == null || !res.File.Exists)
            {
                throw new FileNotFoundException("Input does not exist: " + res.File.FullName);
            }
            
            Stream fs = new FileStream(res.File.FullName, FileMode.Open, FileAccess.Read);
            Pkcs12Store pk12 = new Pkcs12Store(fs, password.ToCharArray());

            //then Iterate throught certificate entries to find the private key entry
            string alias = null;
            foreach (string al in pk12.Aliases)
            {
                if (pk12.IsKeyEntry(al) && pk12.GetKey(al).Key.IsPrivate)
                {
                    alias = al;
                    break;
                }
            }

            fs.Close();

            Akp = pk12.GetKey(alias).Key;
            X509CertificateEntry[] ce = pk12.GetCertificateChain(alias);
            Chain = new Org.BouncyCastle.X509.X509Certificate[ce.Length];
            for (int k = 0; k < ce.Length; ++k)
            {
                Chain[k] = ce[k].Certificate;
            }
        }


    }

}