//****************************************************************
// GetCertPVK
// Uses .NET/CAPICOM 2 to search CryptoAPI certificate store.
// If filtered cert(s) has private key, get keycontainer name.
// If private key is exportable, instantiate .NET RSACSP:
//     RSACryptoServiceProvider(CspParameters csparm)
// Display or export public & private key parameters.
//
// Copyright (C) 2003.  Michel I. Gallant
//*******************************************

using System;
using System.Collections;
using System.Security.Cryptography;
using CAPICOM;

class GetCertPVK 
  {
	static private String storeName = "MY";
	static StoreClass oStore;
	static Certificates oCerts;
	static String filter = "JavaScience";

	[STAThread]
	static void Main(string[] args)
	{
	 oStore = new StoreClass();
	 try{
	 oStore.Open(
		CAPICOM_STORE_LOCATION.CAPICOM_CURRENT_USER_STORE,
		storeName,CAPICOM_STORE_OPEN_MODE.CAPICOM_STORE_OPEN_EXISTING_ONLY | 
		CAPICOM_STORE_OPEN_MODE.CAPICOM_STORE_OPEN_READ_ONLY 
		);
	 }
	 catch(Exception exc){ 
	  Console.WriteLine(exc.Message);
	  return;
	 }
	 oCerts = (Certificates)oStore.Certificates;
	 oCerts = (Certificates)oCerts.Find(
		CAPICOM_CERTIFICATE_FIND_TYPE.CAPICOM_CERTIFICATE_FIND_SUBJECT_NAME,filter, false);
	 Console.WriteLine("\n{0} certificates match substring \"{1}\"", oCerts.Count, filter);

	 string container	= null;
	 bool canexp		= false;
	 int keyspec		= 0;
	 CspParameters cp	= null;
	 RSACryptoServiceProvider rsaCSP = null;

	 foreach(Certificate ocert in oCerts){
		Console.WriteLine("\n{0}", ocert.SubjectName);
		 if(ocert.HasPrivateKey()){
		  container = ocert.PrivateKey.ContainerName;
		  canexp = ocert.PrivateKey.IsExportable();
		  keyspec = (int)ocert.PrivateKey.KeySpec;
		  Console.WriteLine("Key Container: {0}\nType: {1}  Exportable: {2}", container, keyspec, canexp) ;
			if(canexp){  //if pvk is exportable, get .NET RSA and show pvk.
			 cp = new CspParameters();
			 cp.KeyContainerName = container;
			 cp.KeyNumber = keyspec;
			 rsaCSP = new RSACryptoServiceProvider(cp);
			 //-- display public & private key parameters
			 Console.WriteLine("XML: {0}", rsaCSP.ToXmlString(true));
			 //-- could also use RSAParameters rsaParams = rsaCSP.ExportParameters(true);
			 cp	= null;
			 rsaCSP	= null;
			}		  
		 }
	}
  }
}