How to get certificate serial number using vc++

Question

i want to get the certificate serial number using vc++ code.

  HANDLE hStoreHandle;
PCCERT_CONTEXT  pCertContext=NULL;
PCERT_PUBLIC_KEY_INFO pOldPubKey = NULL;
char fResponse ='n';
hStoreHandle = CertOpenSystemStore(NULL,"MY");

while(pCertContext= CertEnumCertificatesInStore(hStoreHandle,pCertContext))
{
    CString strSubVal,strResult,strInput;

    BYTE *pbName=pCertContext->pCertInfo->SerialNumber.pbData;
     }

i think the above code having theserial number data but i dont know how to get it in CString format.Guide me

@peter: im having the above code but i dont know how to get it on CString — sivanesan1
– sivanesan1, Commented Dec 17, 2013 at 12:35

shivcena · Accepted Answer · 2015-04-27 11:48:22Z

1

copy paste the below code

#include <stdio.h>//yourDialog.cpp file
#include <windows.h>
#include <Wincrypt.h>
#include <iostream>
#include <conio.h>
#include <string>
using namespace std;
#pragma comment(lib, "crypt32.lib")
#define MY_ENCODING_TYPE  (PKCS_7_ASN_ENCODING | X509_ASN_ENCODING)

#define KEYLENGTH 0x00800000 

PCCERT_CONTEXT  pCertContext=NULL;
HANDLE hStoreHandle;    
PCERT_PUBLIC_KEY_INFO pOldPubKey = NULL;
char fResponse ='n';
hStoreHandle = CertOpenSystemStore(NULL,"MY");
pCertContext= CertEnumCertificatesInStore(hStoreHandle,pCertContext);
PCERT_INFO pCertifInfo = pCertContext->pCertInfo;
BYTE* pbData = pCertifInfo->SerialNumber.pbData;
DWORD cbData = pCertifInfo->SerialNumber.cbData;
char hex_ascii[3];
CString csAscii;
csAscii.Empty();

if (cbData > 0)
{
  int i;
  CString cs;
  for (i=0; i < cbData; i++)
  {
    BYTE bb = (BYTE) pbData[i];
    sprintf(hex_ascii, "%02X", bb);
    cs.Format("%s", hex_ascii);     
    csAscii = cs + csAscii ;
  }
}

edited Apr 27, 2015 at 11:48

shivcena

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answered Dec 17, 2013 at 13:20

sivanesan1

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4 Comments

Jabberwocky Over a year ago

The test if(csAscii.IsEmpty()) is useless because you know for sure that csAscii is empty, you emptied it 11 lines above (csAscii.Empty();)

IInspectable Over a year ago

@Michael It's not, since csAscii gets populated inside the loop. The check, however, is braindead. The entire if-mayhem can be written as: cs += csAscii;. That's to be expected, though, from someone that marks code as "copy & paste, don't think".

Jabberwocky Over a year ago

@IInspectable: yep that's actually what I meant.

IInspectable Over a year ago

CString csAscii; csAscii.Empty(); is somewhat... creative. Then again, so is sprintf(hex_ascii, "%02X", bb); cs.Format("%s", hex_ascii); - just wow! In a very, very bad way. TheDailyWTF.com-worthy.

Kinjal Dixit · Accepted Answer · 2015-10-16 10:16:27Z

Not sure if you want this: the code below puts the data into a hexadecimal string (theString)

BYTE *pbName=pCertContext->pCertInfo->SerialNumber.pbData;
CString theString ;
for (int i = 0; i < pCertContext->pCertInfo->SerialNumber.cbData; i++)
{
  CString hex ;
  hex.Format("%02x", pbName[i]) ;
  theString += hex ;
}

The code above will give you the Serial Number 'in reverse'. You can confirm this by viewing the serial number in the certificate, by using the 'certmgr.msc' tool.

To get the serial number in the 'correct' order, just change the direction of the for loop. Below is the modified version of the code given above:

BYTE *pbName=pCertContext->pCertInfo->SerialNumber.pbData;
CString theString ;
for (int i = pCertContext->pCertInfo->SerialNumber.cbData - 1; i >= 0 ; i--)
{
  CString hex ;
  hex.Format("%02x", pbName[i]) ;
  theString += hex ;
}

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