3. FAQ o Win API

Q> Как узнать SID юзера?
A> 

BOOL
GetAccountSid(
    LPTSTR SystemName,
    LPTSTR AccountName,
    PSID *Sid
    )
{
    LPTSTR ReferencedDomain=NULL;
    DWORD cbSid=128;    // initial allocation attempt
    DWORD cbReferencedDomain=16; // initial allocation size
    SID_NAME_USE peUse;
    BOOL bSuccess=FALSE; // assume this function will fail

    __try {

    //
    // initial memory allocations
    //
    if((*Sid=HeapAlloc(
                    GetProcessHeap(),
                    0,
                    cbSid
                    )) == NULL) __leave;

    if((ReferencedDomain=(LPTSTR)HeapAlloc(
                    GetProcessHeap(),
                    0,
                    cbReferencedDomain
                    )) == NULL) __leave;

    //
    // Obtain the SID of the specified account on the specified system.
    //
    while(!LookupAccountName(
                    SystemName,         // machine to lookup account on
                    AccountName,        // account to lookup
                    *Sid,               // SID of interest
                    &cbSid,             // size of SID
                    ReferencedDomain,   // domain account was found on
                    &cbReferencedDomain,
                    &peUse
                    )) {
        if (GetLastError() == ERROR_INSUFFICIENT_BUFFER) {
            //
            // reallocate memory
            //
            if((*Sid=HeapReAlloc(
                        GetProcessHeap(),
                        0,
                        *Sid,
                        cbSid
                        )) == NULL) __leave;

            if((ReferencedDomain=(LPTSTR)HeapReAlloc(
                        GetProcessHeap(),
                        0,
                        ReferencedDomain,
                        cbReferencedDomain
                        )) == NULL) __leave;
        }
        else __leave;
    }

    //
    // Indicate success.
    //
    bSuccess=TRUE;

    } // finally
    __finally {

    //
    // Cleanup and indicate failure, if appropriate.
    //

    HeapFree(GetProcessHeap(), 0, ReferencedDomain);

    if(!bSuccess) {
        if(*Sid != NULL) {
            HeapFree(GetProcessHeap(), 0, *Sid);
            *Sid = NULL;
        }
    }

    } // finally

    return bSuccess;
}

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