advapi32: Return the computer name as referenced domain name in LookupAccountName.

dlls/advapi32/security.c

@@ -2629,9 +2629,8 @@ static BOOL lookup_user_account_name(PSID Sid, PDWORD cbSid, LPWSTR ReferencedDo
     HANDLE token;
     BOOL ret;
     PSID pSid;
-    static const WCHAR dm[] = {'D','O','M','A','I','N',0};
+    WCHAR domainName[MAX_COMPUTERNAME_LENGTH + 1];
     DWORD nameLen;
-    LPCWSTR domainName;
 
     if (!OpenThreadToken(GetCurrentThread(), TOKEN_READ, TRUE, &token))
     {
@@ -2655,9 +2654,12 @@ static BOOL lookup_user_account_name(PSID Sid, PDWORD cbSid, LPWSTR ReferencedDo
     }
     *cbSid = GetLengthSid(pSid);
 
-    domainName = dm;
-    nameLen = strlenW(domainName);
-
+    nameLen = MAX_COMPUTERNAME_LENGTH + 1;
+    if (!GetComputerNameW(domainName, &nameLen))
+    {
+        domainName[0] = 0;
+        nameLen = 0;
+    }
     if (*cchReferencedDomainName <= nameLen || !ret)
     {
         SetLastError(ERROR_INSUFFICIENT_BUFFER);
@@ -2683,9 +2685,8 @@ static BOOL lookup_computer_account_name(PSID Sid, PDWORD cbSid, LPWSTR Referenc
 {
     MAX_SID local;
     BOOL ret;
-    static const WCHAR dm[] = {'D','O','M','A','I','N',0};
+    WCHAR domainName[MAX_COMPUTERNAME_LENGTH + 1];
     DWORD nameLen;
-    LPCWSTR domainName;
 
     if ((ret = ADVAPI_GetComputerSid(&local)))
     {
@@ -2699,9 +2700,12 @@ static BOOL lookup_computer_account_name(PSID Sid, PDWORD cbSid, LPWSTR Referenc
         *cbSid = GetLengthSid(&local);
     }
 
-    domainName = dm;
-    nameLen = strlenW(domainName);
-
+    nameLen = MAX_COMPUTERNAME_LENGTH + 1;
+    if (!GetComputerNameW(domainName, &nameLen))
+    {
+        domainName[0] = 0;
+        nameLen = 0;
+    }
     if (*cchReferencedDomainName <= nameLen || !ret)
     {
         SetLastError(ERROR_INSUFFICIENT_BUFFER);
@@ -2898,11 +2902,12 @@ BOOL WINAPI LookupAccountNameW( LPCWSTR lpSystemName, LPCWSTR lpAccountName, PSI
     BOOL ret, handled;
     LSA_UNICODE_STRING account;
 
-    FIXME("%s %s %p %p %p %p %p - stub\n", debugstr_w(lpSystemName), debugstr_w(lpAccountName),
+    TRACE("%s %s %p %p %p %p %p\n", debugstr_w(lpSystemName), debugstr_w(lpAccountName),
           Sid, cbSid, ReferencedDomainName, cchReferencedDomainName, peUse);
 
     if (!ADVAPI_IsLocalComputer( lpSystemName ))
     {
+        FIXME("remote computer not supported\n");
         SetLastError( RPC_S_SERVER_UNAVAILABLE );
         return FALSE;
     }