[PATCH v2 2/3] secur32: Implement NameUserPrincipal format in GetUserNameExW.

[Maxim Karasev]

From: Maxim Karasev

---
 dlls/secur32/secur32.c | 47 +++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 46 insertions(+), 1 deletion(-)

diff --git a/dlls/secur32/secur32.c b/dlls/secur32/secur32.c
index beb52d7d6da..1b1a91950bb 100644
--- a/dlls/secur32/secur32.c
+++ b/dlls/secur32/secur32.c
@@ -1153,12 +1153,57 @@ BOOLEAN WINAPI GetUserNameExW(
             return TRUE;
         }

+    case NameUserPrincipal:
+        {
+            WCHAR *output;
+            DWORD len = 0;
+            BOOL status;
+            DWORD username_len = UNLEN + 1;
+
+            status = GetComputerNameExW(ComputerNameDnsFullyQualified, NULL, &len);
+            if (status || GetLastError() != ERROR_MORE_DATA)
+            {
+                ERR("GetComputerNameExW expected ERROR_MORE_DATA, error %lu\n", GetLastError());
+                return FALSE;
+            }
+
+            output = HeapAlloc(GetProcessHeap(), 0, sizeof(WCHAR) * (username_len + 1 + len));
+
+            status = GetUserNameW(output, &username_len);
+            if (!status)
+            {
+                ERR("GetUserNameW failed, error %lu\n", GetLastError());
+                return FALSE;
+            }
+
+            wcscat(output, L"@");
+
+            status = GetComputerNameExW(ComputerNameDnsFullyQualified, &output[wcslen(output)], &len);
+            if (!status)
+            {
+                ERR("GetComputerNameExW failed, error %lu\n", GetLastError());
+                return FALSE;
+            }
+
+            if (lstrlenW(output) >= *nSize)
+            {
+                TRACE("Output buffer too small\n");
+                SetLastError(ERROR_MORE_DATA);
+                *nSize = lstrlenW(output) + 1;
+                return FALSE;
+            }
+
+            lstrcpyW(lpNameBuffer, output);
+            *nSize = lstrlenW(output);
+
+            return TRUE;
+        }
+
     case NameUnknown:
     case NameFullyQualifiedDN:
     case NameDisplay:
     case NameUniqueId:
     case NameCanonical:
-    case NameUserPrincipal:
     case NameCanonicalEx:
     case NameServicePrincipal:
     case NameDnsDomain: