Extract certificate programmatically from CInternetSession

Question

0.00/5 (No votes)

See more:

Hello! I am using CInternetSession class of MFC to send HTTP queries and get results. Things work fine with bith HTTP and HTTPS.Objects of CInternetSession cal also return details of session by QueryOption which brings options. Now I am trying to extract certificate, using one of two options:

ASM

BYTE lpBuffer[2048];
DWORD lpdwBufferLength = sizeof(lpBuffer);
//CInternetSession session created before and valid and working
//attempt 1
BOOL resQueryOption = session.QueryOption((DWORD)INTERNET_OPTION_SECURITY_CERTIFICATE_STRUCT,  lpBuffer,&lpdwBufferLength);
DWORD erro1r = GetLastError(); //ERROR_INTERNET_INCORRECT_HANDLE_TYPE

//attempt 2
HINTERNET hInternet = (HINTERNET )session; //provides handle OK
BOOL resInternetQueryOption = InternetQueryOption(  hInternet,  INTERNET_OPTION_SECURITY_CERTIFICATE_STRUCT,   lpBuffer,   &lpdwBufferLength);
DWORD error2 = GetLastError(); //ERROR_INTERNET_INCORRECT_HANDLE_TYPE

However the result is FALSE, and the error is ERROR_INTERNET_INCORRECT_HANDLE_TYPE (12018) even if I try to do like samples one can find in Internet. What can be wrong, please?
Levi

Posted 2-Jul-14 2:56am

lkitross

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

lkitross · Answer 1 · 2014-07-03T00:55:00

I found the problem. I sent query too early, the correct way it not send after GetHttpConnection and not after OpenRequest, but only after SendRequest.
So the correct order is

CInternetSession session(_T("something"));
CHttpConnection *pConnection = session.GetHttpConnection(strHost,flags, ipUsedPort,_T(""),_T(""));
CHttpFile *pFile = pConnection->OpenRequest(mode,"url", NULL,1,NULL, NULL, INTERNET_FLAG_SECURE);
res = res && pFile->SendRequest(strHeaders, (LPVOID) (LPCTSTR) sbody.c_str(), sbody.length());
INTERNET_CERTIFICATE_INFO certificateInfo;
DWORD certInfoLength = sizeof(INTERNET_CERTIFICATE_INFO);
BOOL resQueryResult = pFile->QueryOption((DWORD)INTERNET_OPTION_SECURITY_CERTIFICATE_STRUCT, &certificateInfo,&certInfoLength);
DWORD erro1r = GetLastError();

Sorry to bother, Levi