Search
Module:
Directory

   Desktop Functions:

   Smart Device Functions:


Show Recent Changes
Subscribe (RSS)
Misc. Pages
Comments
FAQ
Helpful Tools
Playground
Suggested Reading
Website TODO List
Support Forum
Download Visual Studio Add-In

Terms of Use
Privacy Policy
certopensystemstore (crypt32)
 
.
Summary

C# Signature:

[DllImport("crypt32.dll", CharSet=CharSet.Auto, SetLastError=true)]
static extern IntPtr CertOpenSystemStore(IntPtr hCryptProv, string storename);

VB .NET Signature:

    <DllImport("Crypt32.dll", CharSet:=CharSet.Auto, SetLastError:=True)> _
    Private Shared Function CertOpenSystemStore( _
    ByVal hCryptProv As IntPtr, _
    ByVal storename As String) As IntPtr
    End Function

User-Defined Types:

None.

Notes:

Try MSDN: http://msdn.microsoft.com/en-us/library/ms867087.aspx

The sample code below seems to be taken from this.

Tips & Tricks:

Please add some!

Sample Code:

using System;

using System.Runtime.InteropServices;

using System.Security.Cryptography.X509Certificates;

using System.ComponentModel;

public class WinCapi {

/*

HCERTSTORE   WINAPI CertOpenSystemStore(HCRYPTPROV hprov, LPTCSTR szSubsystemProtocol);
BOOL      WINAPI CertCloseStore(HCERTSTORE hCertStore, DWORD dwFlags);

PCCERT_CONTEXT WINAPI CertFindCertificateInStore(
  HCERTSTORE hCertStore,
  DWORD dwCertEncodingType,
  DWORD dwFindFlags,
  DWORD dwFindType,
  const void* pvFindPara,
  PCCERT_CONTEXT pPrevCertContext);

BOOL WINAPI CertFreeCertificateContext(

  PCCERT_CONTEXT pCertContext

);

*/

[DllImport("crypt32.dll", CharSet=CharSet.Auto, SetLastError=true)]
    public static extern IntPtr CertOpenSystemStore(
   IntPtr hCryptProv,
   string storename) ;

[DllImport("crypt32.dll", SetLastError=true)]
    public static extern bool CertCloseStore(
   IntPtr hCertStore,
   uint dwFlags) ;

[DllImport("crypt32.dll", SetLastError=true)]
    public static extern IntPtr CertFindCertificateInStore(
   IntPtr hCertStore,
   uint dwCertEncodingType,
   uint dwFindFlags,
   uint dwFindType,
   [In, MarshalAs(UnmanagedType.LPWStr)]String pszFindString,
   IntPtr pPrevCertCntxt) ;

[DllImport("crypt32.dll", SetLastError=true)]
    public static extern bool CertFreeCertificateContext(
   IntPtr hCertStore) ;

}

public class SimpleCert {

const string MY   = "MY";
const string OTHERS   = "AddressBook";
const uint PKCS_7_ASN_ENCODING    = 0x00010000;
const uint X509_ASN_ENCODING       = 0x00000001;
const uint CERT_FIND_SUBJECT_STR   = 0x00080007;

static uint MY_ENCODING_TYPE    = PKCS_7_ASN_ENCODING | X509_ASN_ENCODING ;

static string lpszCertSubject = "searched name" ;

public static void Main(){
  IntPtr hSysStore  = IntPtr.Zero;
  IntPtr hCertCntxt = IntPtr.Zero;

  hSysStore = WinCapi.CertOpenSystemStore(IntPtr.Zero, MY) ;
  Console.WriteLine("Store Handle:\t0x{0:X}", hSysStore.ToInt32());

if(hSysStore != IntPtr.Zero)
{
   hCertCntxt=WinCapi.CertFindCertificateInStore(
      hSysStore,
      MY_ENCODING_TYPE,
      0,
      CERT_FIND_SUBJECT_STR,
      lpszCertSubject ,
      IntPtr.Zero) ;

  if(hCertCntxt != IntPtr.Zero){  //use certcontext from managed code
   Console.WriteLine("CertContext:\t0x{0:X}", hCertCntxt.ToInt32()) ;
    X509Certificate foundcert = new X509Certificate(hCertCntxt);
   Console.WriteLine("\nFound certificate with SubjectName string \"{0}\"",lpszCertSubject);
   Console.WriteLine("SubjectName:\t{0}", foundcert.GetName());
   Console.WriteLine("Serial No:\t{0}", foundcert.GetSerialNumberString());
   Console.WriteLine("HashString:\t{0}" , foundcert.GetCertHashString());
   }
  else
    Console.WriteLine("Could not find SubjectName containing string \"{0}\"", lpszCertSubject);
}

//------- Clean Up ---------

  if(hCertCntxt != IntPtr.Zero)
   WinCapi.CertFreeCertificateContext(hCertCntxt);
  if(hSysStore != IntPtr.Zero)
   WinCapi.CertCloseStore(hSysStore, 0) ;
}

}

Alternative Managed API:

TODO

Documentation

Please edit this page!

Do you have...

  • helpful tips or sample code to share for using this API in managed code?
  • corrections to the existing content?
  • variations of the signature you want to share?
  • additional languages you want to include?

Select "Edit This Page" on the right hand toolbar and edit it! Or add new pages containing supporting types needed for this API (structures, delegates, and more).

 
Access PInvoke.net directly from VS:
Terms of Use
Edit This Page
Find References
Show Printable Version
Revisions