Biegral Blog

      在Win7中，你可以在cmd中输入whoami/user来轻松获取sid信息，但是，要在程序中获得，该怎么做呢？如下（Windows API, 我服了你）：

#include <stdio.h>
#include <windows.h>
#define MAX_NAME 256

void ConvertSid(PSID pSid, LPTSTR TextualSid)
{
	PSID_IDENTIFIER_AUTHORITY psia = GetSidIdentifierAuthority(pSid);	
	DWORD sidLen = sprintf(TextualSid, TEXT("S-%lu-"), SID_REVISION);
	sidLen += sprintf(TextualSid + strlen(TextualSid), TEXT("%lu"), psia->Value[5]);
	
	int i = 0;
	int subAuthorities = *GetSidSubAuthorityCount(pSid);
	for (i = 0; i < subAuthorities; i++)
	{
		sidLen += sprintf(TextualSid + sidLen, TEXT("-%lu"), *GetSidSubAuthority(pSid, i));
	}
}

void GetLocalSid(LPTSTR szSid)
{
	char szUserName[MAX_NAME] = {0};
	DWORD nameSize = sizeof(szUserName) ;
	GetUserName(szUserName, &nameSize);

	char szUserSid[MAX_NAME] = {0};
	char szUserDomain[MAX_NAME] = {0};
	DWORD sidSize = sizeof(szUserSid);
	DWORD domainSize = sizeof(szUserDomain);
	SID_NAME_USE snu;
	
	LookupAccountName( NULL,
		               szUserName,
		               (PSID)szUserSid,
					   &sidSize,
					   szUserDomain,
					   &domainSize,
					   &snu
					 );
	
	ConvertSid(szUserSid, szSid);	
}

int main()
{
	char szSid[MAX_NAME] = {0};
	GetLocalSid(szSid);
	printf("%s\n", szSid);

	return 0;
}