A Simple Win32 security impersonation program example using C code

A Simple Impersonation Program Example

The following example shows simple impersonation using ImpersonateLoggedOnUser().

Create a new empty Win32 console application project. Give a suitable project name and change the project location if needed.

Log on a user to a machine Program Example: Creating new C++ Win32 console mode application project

Then, add the source file and give it a suitable name.

Log on a user to a machine Program Example: Adding the C++ source file for the source code

Next, add the following source code.

#include <windows.h>

#include <stdio.h>

int wmain(int argc, WCHAR **argv)

{

// Handle to token

HANDLE hToken;

// Open a handle to the access token for the

// calling process that is the currently login access token

if(!OpenProcessToken(GetCurrentProcess(), TOKEN_ALL_ACCESS, &hToken))

{

wprintf(LOpenProcessToken()-Getting the handle to access token failed, error %u\n, GetLastError());

}

else

wprintf(LOpenProcessToken()-Got the handle to access token!\n);

// Lets the calling process impersonate the security context of a logged-on user.

if(ImpersonateLoggedOnUser(hToken))

wprintf(LImpersonateLoggedOnUser() is OK.\n);

else

{

wprintf(LImpersonateLoggedOnUser() failed, error %u.\n, GetLastError());

exit(-1);

}

/////////////////

// TODO: Do other desired tasks

//////////////////

// Terminates the impersonation of a client.

if(RevertToSelf())

wprintf(LImpersonation was terminated.\n);

// Close the handle

if(CloseHandle(hToken))

wprintf(LHandle to an access token was closed.\n);

else

wprintf(LFailed to close the hToken handle! error %u\n, GetLastError());

return 0;

}

Build and run the project. The following screenshot is a sample output.

Log on a user to a machine Program Example: A sample console output