CertStore.cpp

CertStore.cpp

#include <stdio.h>
#include <windows.h>
#include <wincrypt.h>
#include <cryptuiapi.h>

#include <io.h>
#include <tchar.h>
#include <stdlib.h>

#pragma comment (lib, "crypt32.lib")
#pragma comment (lib, "cryptui.lib")

int main(int argc, char* argv[])
{
    //--------------------------------------------------------------------
    // Declare and initialize variables.
    HCERTSTORE       hCertStore = NULL;        
    PCCERT_CONTEXT   pCertContext = NULL;      

    if(hCertStore = CertOpenStore( CERT_STORE_PROV_MEMORY, 0, NULL, 0, NULL )) {
        printf("The memory store was created successfully.\n");
    }
    else {
        printf("An error occurred during creation of the memory store!\n");
        exit(1);
    }

    //--------------------------------------------------------------------
    // Add cert to store
    unsigned char CertEncoded[4096];
    FILE *fp = fopen("oca1sm2.cer", "rb");
    if (fp == NULL) {
        printf("An error occurred during fopen(osa1sm2.cer, rb)!\n");
        exit(1);
    }
    long DataLength = _filelength(_fileno(fp));
    fread(CertEncoded, DataLength, 1, fp);
    if (!CertAddEncodedCertificateToStore(hCertStore, X509_ASN_ENCODING | PKCS_7_ASN_ENCODING, CertEncoded, DataLength, CERT_STORE_ADD_USE_EXISTING, NULL)) {
        printf("An error occurred during CertAddEncodedCertificateToStore!\n");
        exit(1);
    }

    //--------------------------------------------------------------------
    //  Display a list of the certificates in the store and allow the user to select a certificate. 
    if(!(pCertContext = CryptUIDlgSelectCertificateFromStore( hCertStore, NULL, NULL, NULL, CRYPTUI_SELECT_LOCATION_COLUMN, 0, NULL))) {
        printf("Select Certificate UI failed.\n" );
        exit(1);
    }

    // Use the certificate as needed.
    char pszNameString[256];
    if(CertGetNameString( pCertContext, CERT_NAME_URL_TYPE, 0, NULL, pszNameString, 128)) {
        printf("\nCertificate for %s \n",pszNameString);
    }
    else fprintf(stderr,"CertGetName failed. \n");

    //--------------------------------------------------------------------
    // When all processing is completed, clean up.
    if(pCertContext) {
        CertFreeCertificateContext(pCertContext);
    }

    if(hCertStore) {
        if (!CertCloseStore(hCertStore,0)) {
            printf("CertCloseStore failed.\n" );
            exit(1);
        }
    }
}