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#include <stdio.h>
#include <windows.h>
#include <wincrypt.h>
#define MY_TYPE  (PKCS_7_ASN_ENCODING | X509_ASN_ENCODING)

//--------------------------------------------------------------------
//    Define the name of the store where the needed certificate
//    can be found. 

#define CERT_STORE_NAME  L"MY"

//--------------------------------------------------------------------
//   Declare local functions.
//   Local function definitions follow main.

void HandleError(char *s);

void main(void)
{
//--------------------------------------------------------------------
// Declare and initialize local variables. 
// This includes initializing a pointer to the message. 
// Usually, the message will exist somewhere and a pointer will
// be passed to the application.

//--------------------------------------------------------------------
// System store handle

HCERTSTORE hStoreHandle;   

//--------------------------------------------------------------------
// Pointer to a certificate

PCCERT_CONTEXT pCert;
PCCERT_CONTEXT pPrevCert;
 
LPBYTE pEncodedBytes = NULL;
LPBYTE pHash;
DWORD cbData, i;

//--------------------------------------------------------------------
// Open a certificate store.

if ( !( hStoreHandle = CertOpenStore(
   CERT_STORE_PROV_SYSTEM,
   0,
   NULL,
   CERT_SYSTEM_STORE_LOCAL_MACHINE,
   CERT_STORE_NAME)))
{
     HandleError("The MY store could not be opened.");
}


pPrevCert = NULL;

for (; ((pCert = CertEnumCertificatesInStore(hStoreHandle, pPrevCert)) 
	                                         != NULL);
    pPrevCert = pCert)
{
    CERT_ENHKEY_USAGE *pKeyUsage;
    DWORD j, nLen;
    BOOL bFound = FALSE;
    char certName[1024];

    nLen = sizeof(certName);
    certName[0] = 0;
    if (CertNameToStr(MY_TYPE, &(pCert->pCertInfo->Subject),
        CERT_X500_NAME_STR,
        certName,
        sizeof(certName)))
    {
        printf("Checking %s certificate\n", certName);
    }

    cbData = 0;
    if (!CertGetEnhancedKeyUsage(pCert,
        0,
        NULL,
        &cbData) || cbData == 0)
    {
        if (GetLastError() == CRYPT_E_NOT_FOUND)
        {
            printf("%s certificate is for all key usages\n", certName);
            break;
        }
        else
            printf("CertGetEnhancedKeyUsage failed with error code : %08X\n",
                GetLastError());
    }
    pKeyUsage = (CERT_ENHKEY_USAGE *)
        HeapAlloc(GetProcessHeap(), 0, cbData);
    if (pKeyUsage == NULL)
    {
        printf("HeapAlloc failed with error code : %08X\n",
            GetLastError());
        HandleError("Certificate not found.");
    }
    if (!CertGetEnhancedKeyUsage(pCert,
        0,
        pKeyUsage,
        &cbData))
    {
        if (GetLastError() == CRYPT_E_NOT_FOUND)
        {
            printf("%s certificate is for all key usages\n", certName);
            HeapFree(GetProcessHeap(), 0, pKeyUsage);
            break;
        }
        else
        {
            printf("CertGetEnhancedKeyUsage failed with error code : %08X\n",
                GetLastError());
            HeapFree(GetProcessHeap(), 0, pKeyUsage);
            continue;
        }
    }

    if (pKeyUsage->cUsageIdentifier == 0)
    {
        printf("%s certificate is for all key usages\n", certName);
        HeapFree(GetProcessHeap(), 0, pKeyUsage);
        break;
    }

    bFound = FALSE;
    for (j = 0; j < pKeyUsage->cUsageIdentifier; j++)
    {
        if (strcmpi(pKeyUsage->rgpszUsageIdentifier[j], 
			        szOID_PKIX_KP_SERVER_AUTH) == 0)
        {
            printf("%s certificate is for Server Authentication\n", 
				   certName);
            bFound = TRUE;
            break;
        }
    }

    HeapFree(GetProcessHeap(), 0, pKeyUsage);
    if (bFound)
        break;
}

if (pCert == NULL)
   HandleError("Certificate not found.");

if (pPrevCert)
{
    CertFreeCertificateContext(pPrevCert);
    pPrevCert = NULL;
}

/// CASE 2 Get the hash from the certificate
pHash = NULL;
cbData = 0;
CertGetCertificateContextProperty(pCert, CERT_HASH_PROP_ID, NULL, &cbData);
if (cbData == 0)
{
   HandleError("CertGetCertificateContextProperty 1 failed");
}

pHash = (LPBYTE)HeapAlloc(GetProcessHeap(), 0, cbData);
if (pHash == NULL)
{
   HandleError("HeapAlloc failed");
}
if (!CertGetCertificateContextProperty(pCert, CERT_HASH_PROP_ID, pHash, 
	                                   &cbData))
{
   HandleError("CertGetCertificateContextProperty 2 failed");
}

printf("CERT_HASH_PROP_ID Length is %d\n", cbData);
printf("CERT_HASH_PROP_ID BYTES [", cbData);

for (i = 0; i < cbData; i++)
{
    printf("%02X", pHash[i]);
}
printf("]\n");

//--------------------------------------------------------------------
// Clean up and free memory.

if (pEncodedBytes)
    HeapFree(GetProcessHeap(), 0, pEncodedBytes);

if (pHash)
    HeapFree(GetProcessHeap(), 0, pHash);

if(pCert)
     CertFreeCertificateContext(pCert);
if(CertCloseStore(
      hStoreHandle, 
      CERT_CLOSE_STORE_CHECK_FLAG))
{
    printf("The store closed and all certificates are freed. \n");
}
else
{
    printf("Store closed -- \n"
          "not all certificates, CRLs or CTLs were freed");
}
} // End of main

//--------------------------------------------------------------------
//  This example uses the function HandleError, a simple error
//  handling function, to print an error message to the standard error 
//  (stderr) file and exit the program. 
//  For most applications, replace this function with one 
//  that does more extensive error reporting.

void HandleError(char *s)
{
    fprintf(stderr,"An error occurred in running the program. \n");
    fprintf(stderr,"%s\n",s);
    fprintf(stderr, "Error number %x.\n", GetLastError());
    fprintf(stderr, "Program terminating. \n");
    exit(1);
} // End of HandleError

#define UNICODE // unicode must be defined for Metabase access
#define INITGUID 
#include <windows.h>
#include <httpfilt.h>
#include <stdio.h> 

#define SETDATA

#include <iadmw.h>    // COM Interface header 
#include <iiscnfg.h>  // MD_ & IIS_MD_ #defines 



extern "C" wmain (int argc, TCHAR ** argv)
{  
	IMSAdminBase  *pIMeta;  
	METADATA_HANDLE MyHandle; 
    HRESULT hres;
   	METADATA_RECORD record = {0};
    TCHAR szError [2048];
	BYTE *myData=NULL;
    DWORD dwSize = sizeof (record);
 	DWORD i;

	// this just a sample of some thumbprint
	BYTE bar[]={0x24, 0xC6, 0xBA, 0xBB, 0x81, 0x76, 0x05, 0xC9, 0xC3, 
		        0x97, 0x6D, 0x4D, 0xEB, 0x85, 0x8F, 0x4F, 0xBF, 0x38,
				0xFD};
    
    
    CoInitialize (NULL);
    
    // get a pointer to the IIS Admin Base Object
	hres = CoCreateInstance(CLSID_MSAdminBase, NULL, CLSCTX_ALL, 
			IID_IMSAdminBase, (void **) &pIMeta);  
	if (FAILED(hres))  
	{
	    wsprintf (szError, L"CoCreateInstance Failed. Error: %x\n", hres);
        printf ("%S\n", szError);
		CoUninitialize();
        return TRUE;  
	}
    
    // for this test use only 1st server instance
    hres = pIMeta->OpenKey(METADATA_MASTER_ROOT_HANDLE, L"/LM", 
		METADATA_PERMISSION_READ|METADATA_PERMISSION_WRITE, 20, &MyHandle); 
	if (FAILED (hres) )
	{
		wsprintf (szError, L"OpenKey Failed. Error: %x\n", hres);
        printf ("%S\n", szError);
		goto clean;
	}
    
	// SSLCertHash = 5506
	record.dwMDIdentifier =  5506;
    record.dwMDAttributes =METADATA_INHERIT;
    record.dwMDUserType=IIS_MD_UT_SERVER;
    record.dwMDDataType= BINARY_METADATA;
    record.pbMDData = (unsigned char *) myData;

#ifndef SETDATA
#pragma message ("Building for GetData\n")    
	again:
    hres = pIMeta->GetData (MyHandle,argv[1], &record, &dwSize);
   	if (FAILED (hres) )
	{
		if (hres == MD_ERROR_DATA_NOT_FOUND)
		{
			printf ("%S\n", L"Data not found, no certificate is set!");
			goto clean;
		}
		else if (HRESULT_CODE(hres)==ERROR_INSUFFICIENT_BUFFER)
		{
			record.dwMDDataLen=dwSize;
			myData = (LPBYTE)HeapAlloc(GetProcessHeap(), 0, dwSize);
			record.pbMDData  = (unsigned char *)myData;
		    goto again;
		}
		else  
		{
			wsprintf (szError, L"GetData Failed. Error: %x\n", hres);
			printf ("%S\n", szError);
			goto clean;;
		}
	}

	printf ("%S", L"Got thumbprint. You can compare" 
		          L" it with the MMC for IIS value:\n");	
	for ( i=0; i<(record.dwMDDataLen/sizeof (BYTE)); i++)		
		printf ("%2X ", myData[i]);  
	HeapFree(GetProcessHeap(), 0, myData);
#else
#pragma message ("Building for SetData\n")

	
	record.pbMDData = bar;
	record.dwMDDataLen = 19; // in real code it should be the size 
                                                   // of the thumbprint buffer
	hres = pIMeta->SetData (MyHandle,argv[1], &record);
	if (FAILED (hres) )
	{
		printf ("Set data failed: 0x%x!\n", hres);
		goto clean;
	}
	else
		printf ("New thumbprint is set\n");
#endif

clean:
	pIMeta->CloseKey(MyHandle); 
	pIMeta->SaveData();
	pIMeta->Release();
	CoUninitialize();

	return 1;
}