qga-win: fix installation on localized windows

Bug: https://bugzilla.redhat.com/show_bug.cgi?id=1357789
Replace hardcoded user and group names ("Administrators", "SYSTEM") with the ones acquired from system. Windows uses localized strings for these names and it may cause the installation to fail.
Windows has Well-known SIDs for "Administrators" group and "SYSTEM" user so they were used to identify required users and groups.
Well-known SIDs: https://support.microsoft.com/en-us/help/243330/well-known-security-identifiers-in-windows-operating-systems

Signed-off-by: Daniel Rempel <daniel@daynix.com>
Signed-off-by: Sameeh Jubran <sjubran@redhat.com>
Reviewed-by: Sameeh Jubran <sameeh@daynix.com>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>

diff --git a/qga/vss-win32/install.cpp b/qga/vss-win32/install.cpp
index f41fcdfdda44d9d9a4ac9b2be946698bc32b0d50..ba7c94eb256b05f285de39ec7bcd5220b27cbffa 100644 (file)
--- a/qga/vss-win32/install.cpp
+++ b/qga/vss-win32/install.cpp
@@ -18,6 +18,9 @@
 #include <wbemidl.h>
 #include <comdef.h>
 #include <comutil.h>
+#include <sddl.h>
+
+#define BUFFER_SIZE 1024
 
 extern HINSTANCE g_hinstDll;
 
@@ -135,6 +138,27 @@ out:
     return hr;
 }
 
+/* Acquire group or user name by SID */
+static HRESULT getNameByStringSID(
+    const wchar_t *sid, LPWSTR buffer, LPDWORD bufferLen)
+{
+    HRESULT hr = S_OK;
+    PSID psid = NULL;
+    SID_NAME_USE groupType;
+    DWORD domainNameLen = BUFFER_SIZE;
+    wchar_t domainName[BUFFER_SIZE];
+
+    chk(ConvertStringSidToSidW(sid, &psid));
+    LookupAccountSidW(NULL, psid, buffer, bufferLen,
+                domainName, &domainNameLen, &groupType);
+    hr = HRESULT_FROM_WIN32(GetLastError());
+
+    LocalFree(psid);
+
+out:
+    return hr;
+}
+
 /* Find and iterate QGA VSS provider in COM+ Application Catalog */
 static HRESULT QGAProviderFind(
     HRESULT (*found)(ICatalogCollection *, int, void *), void *arg)
@@ -216,6 +240,10 @@ STDAPI COMRegister(void)
     CHAR dllPath[MAX_PATH], tlbPath[MAX_PATH];
     bool unregisterOnFailure = false;
     int count = 0;
+    DWORD bufferLen = BUFFER_SIZE;
+    wchar_t buffer[BUFFER_SIZE];
+    const wchar_t *administratorsGroupSID = L"S-1-5-32-544";
+    const wchar_t *systemUserSID = L"S-1-5-18";
 
     if (!g_hinstDll) {
         errmsg(E_FAIL, "Failed to initialize DLL");
@@ -284,11 +312,12 @@ STDAPI COMRegister(void)
 
     /* Setup roles of the applicaion */
 
+    chk(getNameByStringSID(administratorsGroupSID, buffer, &bufferLen));
     chk(pApps->GetCollection(_bstr_t(L"Roles"), key,
                              (IDispatch **)pRoles.replace()));
     chk(pRoles->Populate());
     chk(pRoles->Add((IDispatch **)pObj.replace()));
-    chk(put_Value(pObj, L"Name",        L"Administrators"));
+    chk(put_Value(pObj, L"Name", buffer));
     chk(put_Value(pObj, L"Description", L"Administrators group"));
     chk(pRoles->SaveChanges(&n));
     chk(pObj->get_Key(&key));
@@ -303,8 +332,10 @@ STDAPI COMRegister(void)
     chk(GetAdminName(&name));
     chk(put_Value(pObj, L"User", _bstr_t(".\\") + name));
 
+    bufferLen = BUFFER_SIZE;
+    chk(getNameByStringSID(systemUserSID, buffer, &bufferLen));
     chk(pUsersInRole->Add((IDispatch **)pObj.replace()));
-    chk(put_Value(pObj, L"User", L"SYSTEM"));
+    chk(put_Value(pObj, L"User", buffer));
     chk(pUsersInRole->SaveChanges(&n));
 
 out: