Problem - Kevin Tafuro

found, NULL will be returned, and GetLastError( ) will return ERROR_NONE_MAPPED. If
any other kind of error occurs, SpcLookupName( ) will return NULL, and GetLastError( )
will return the relevant error code.
#include
PSID SpcLookupName(LPCTSTR lpszSystemName, LPCTSTR lpszAccountName) {
PSID Sid;
DWORD cbReferencedDomainName, cbSid;
LPTSTR ReferencedDomainName;
SID_NAME_USE eUse;
cbReferencedDomainName = cbSid = 0;
if (LookupAccountName(lpszSystemName, lpszAccountName, 0, &cbSid,
0, &cbReferencedDomainName, &eUse)) {
SetLastError(ERROR_NONE_MAPPED);
return 0;
}
if (GetLastError( ) != ERROR_INSUFFICIENT_BUFFER) return 0;
if (!(Sid = (PSID)LocalAlloc(LMEM_FIXED, cbSid))) return 0;
ReferencedDomainName = (LPTSTR)LocalAlloc(LMEM_FIXED, cbReferencedDomainName);
if (!ReferencedDomainName) {
LocalFree(Sid);
return 0;
}
if (!LookupAccountName(lpszSystemName, lpszAccountName, Sid, &cbSid,
ReferencedDomainName, &cbReferencedDomainName, &eUse)) {
LocalFree(ReferencedDomainName);
LocalFree(Sid);
return 0;
}
LocalFree(ReferencedDomainName);
return Sid;
}
The Win32 API function LookupAccountSid( ) is used to find the name that corresponds
to a SID. You can use it to obtain information about a SID on either the local
system or a remote system. While it might seem that mapping a SID to a name is a
simple operation, LookupAccountSid( ) actually requires a large number of arguments
to allow it to complete its work.
LookupAccountSid( ) has the following signature:
BOOL LookupAccountSid(LPCTSTR lpSystemName, PSID Sid,LPTSTR Name, LPDWORD cbName,
LPTSTR ReferencedDomainName, LPDWORD cbReferencedDomainName,
PSID_NAME_USE peUse);
This function has the following arguments:
lpSystemName
String representing the name of the remote system on which to look up the SID.
If you specify this argument as NULL, the lookup will be done on the local system.
Getting User and Group Information on Windows | 377
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