CODEWITHSUNDEEP
c++cwindowswinapi
roybj
roybj

Reputation: 278

GetTokenInformation fails (error 998) on windows server 2003 but works on 2008

I have a problem when calling GetTokenInformation, for some reason it fails on windows server 2003 32bit but succeeds on server 2008 64bit.

    PTOKEN_USER pSIDTokenUser = NULL;
    DWORD       dwReturnLength;   

    if (!GetTokenInformation(hToken, TokenUser, NULL, 0, &dwReturnLength) && GetLastError() != ERROR_INSUFFICIENT_BUFFER)
    {
           //handle error
    }

    pSIDTokenUser = (PTOKEN_USER)new BYTE[dwReturnLength];
    memset(pSIDTokenUser, 0, dwReturnLength); 


    if (!pSIDTokenUser)
           //handle error

    if (!GetTokenInformation(hToken, TokenUser, pSIDTokenUser, dwReturnLength, NULL))
           //handle error

the second call to GetTokenInformation on windows 2003 always return 0 with the error 998 ("Invalid access to memory location"). I assume it has something to do with the pSIDTokenUser size/alignment (I use the default) etc, but could not find the reason.

Thanks.

Upvotes: 0

Views: 976

Answers (1)

Roger Lipscombe
Roger Lipscombe

Reputation: 91925

The final parameter, ReturnLength is not optional, according to the function annotations. Don't pass NULL in the second call. You appear to be getting away with it on Windows 2008.

Upvotes: 2

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