{

LONG lStatus;

// Initialize the WINTRUST_FILE_INFO structure.

WINTRUST_FILE_INFO FileData;

memset(&FileData, 0, sizeof(FileData));

FileData.cbStruct = sizeof(WINTRUST_FILE_INFO);

FileData.pcwszFilePath = pwszSourceFile;

FileData.hFile = NULL;

FileData.pgKnownSubject = NULL;

/*

GUID WVTPolicyGUID = WINTRUST_ACTION_GENERIC_VERIFY_V2;

WINTRUST_DATA WinTrustData;

// Initialize the WinVerifyTrust input data structure.

// Default all fields to 0.

memset(&WinTrustData, 0, sizeof(WinTrustData));

WinTrustData.cbStruct = sizeof(WinTrustData);

// Use default code signing EKU.

WinTrustData.pPolicyCallbackData = NULL;

// No data to pass to SIP.

WinTrustData.pSIPClientData = NULL;

// Disable WVT UI.

WinTrustData.dwUIChoice = WTD_UI_NONE;

// No revocation checking.

WinTrustData.fdwRevocationChecks = WTD_REVOKE_NONE;

// Verify an embedded signature on a file.

WinTrustData.dwUnionChoice = WTD_CHOICE_FILE;

// Verify action.

WinTrustData.dwStateAction = WTD_STATEACTION_VERIFY;

// Verification sets this value.

WinTrustData.hWVTStateData = NULL;

// Not used.

WinTrustData.pwszURLReference = NULL;

// This is not applicable if there is no UI because it changes

// the UI to accommodate running applications instead of

// installing applications.

WinTrustData.dwUIContext = 0;

// Set pFile.

WinTrustData.pFile = &FileData;

// WinVerifyTrust verifies signatures as specified by the GUID

// and Wintrust_Data.

lStatus = WinVerifyTrust(

static_cast<HWND>(INVALID_HANDLE_VALUE),

&WVTPolicyGUID,

&WinTrustData);

bool bRet = lStatus == ERROR_SUCCESS;

#if 0 // this code is not needed, but left in for future reference

DWORD dwLastError;

switch (lStatus) {

case ERROR_SUCCESS:

/*

Signed file:

- Hash that represents the subject is trusted.

- Trusted publisher without any verification errors.

- UI was disabled in dwUIChoice. No publisher or

time stamp chain errors.

- UI was enabled in dwUIChoice and the user clicked

"Yes" when asked to install and run the signed

subject.

*/

wprintf_s(L"The file \"%s\" is signed and the signature "

L"was verified.\n",

pwszSourceFile);

break;

case TRUST_E_NOSIGNATURE:

// The file was not signed or had a signature

// that was not valid.

// Get the reason for no signature.

dwLastError = GetLastError();

if (TRUST_E_NOSIGNATURE == dwLastError ||

TRUST_E_SUBJECT_FORM_UNKNOWN == dwLastError ||

TRUST_E_PROVIDER_UNKNOWN == dwLastError) {

// The file was not signed.

wprintf_s(L"The file \"%s\" is not signed.\n",

pwszSourceFile);

} else {

// The signature was not valid or there was an error

// opening the file.

wprintf_s(L"An unknown error occurred trying to "

L"verify the signature of the \"%s\" file.\n",

pwszSourceFile);

}

break;

case TRUST_E_EXPLICIT_DISTRUST:

// The hash that represents the subject or the publisher

// is not allowed by the admin or user.

wprintf_s(L"The signature is present, but specifically "

L"disallowed.\n");

break;

case TRUST_E_SUBJECT_NOT_TRUSTED:

// The user clicked "No" when asked to install and run.

wprintf_s(L"The signature is present, but not "

L"trusted.\n");

break;

case CRYPT_E_SECURITY_SETTINGS:

/*

The hash that represents the subject or the publisher

was not explicitly trusted by the admin and the

admin policy has disabled user trust. No signature,

publisher or time stamp errors.

*/

wprintf_s(L"CRYPT_E_SECURITY_SETTINGS - The hash "

L"representing the subject or the publisher wasn't "

L"explicitly trusted by the admin and admin policy "

L"has disabled user trust. No signature, publisher "

L"or timestamp errors.\n");

break;

default:

// The UI was disabled in dwUIChoice or the admin policy

// has disabled user trust. lStatus contains the

// publisher or time stamp chain error.

wprintf_s(L"Error is: 0x%x.\n",

lStatus);

break;

}

#endif // #if 0

// Any hWVTStateData must be released by a call with close.

WinTrustData.dwStateAction = WTD_STATEACTION_CLOSE;

lStatus = WinVerifyTrust(

NULL,

&WVTPolicyGUID,

&WinTrustData);

return bRet;