From 486a9d1b951141a2d688bc392e775e273000e5b8 Mon Sep 17 00:00:00 2001
From: Timo Kreuzer <timo.kreuzer@reactos.org>
Date: Sat, 11 Jan 2014 23:13:48 +0000
Subject: [PATCH] [NTOSKRNL] Implement CmpLinkKeyToHive and create missing
 HKLM\Security\SAM -> HKLM\SAM\SAM and HKU\S-1-5-18 -> HKU\.Default links.

svn path=/trunk/; revision=61591
---
 reactos/ntoskrnl/config/cmsysini.c | 73 +++++++++++++++++++++++++++++-
 1 file changed, 71 insertions(+), 2 deletions(-)

diff --git a/reactos/ntoskrnl/config/cmsysini.c b/reactos/ntoskrnl/config/cmsysini.c
index aa69546a6cd..3d97640dc21 100644
--- a/reactos/ntoskrnl/config/cmsysini.c
+++ b/reactos/ntoskrnl/config/cmsysini.c
@@ -36,6 +36,71 @@ extern BOOLEAN CmFirstTime;
 
 /* FUNCTIONS ******************************************************************/
 
+BOOLEAN
+NTAPI
+CmpLinkKeyToHive(
+    _In_z_ PWSTR LinkKeyName,
+    _In_z_ PWSTR TargetKeyName)
+{
+    OBJECT_ATTRIBUTES ObjectAttributes;
+    UNICODE_STRING LinkKeyName_U;
+    HANDLE TargetKeyHandle;
+    ULONG Disposition;
+    NTSTATUS Status;
+    PAGED_CODE();
+
+    /* Initialize the object attributes */
+    RtlInitUnicodeString(&LinkKeyName_U, LinkKeyName);
+    InitializeObjectAttributes(&ObjectAttributes,
+                               &LinkKeyName_U,
+                               OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE,
+                               NULL,
+                               NULL);
+
+    /* Create the link key */
+    Status = ZwCreateKey(&TargetKeyHandle,
+                         KEY_CREATE_LINK,
+                         &ObjectAttributes,
+                         0,
+                         NULL,
+                         REG_OPTION_VOLATILE | REG_OPTION_CREATE_LINK,
+                         &Disposition);
+    if (!NT_SUCCESS(Status))
+    {
+        DPRINT1("CM: CmpLinkKeyToHive: couldn't create %S Status = 0x%lx\n",
+                LinkKeyName, Status);
+        return FALSE;
+    }
+
+    /* Check if the new key was actually created */
+    if (Disposition != REG_CREATED_NEW_KEY)
+    {
+        DPRINT1("CM: CmpLinkKeyToHive: %S already exists!\n", LinkKeyName);
+        ZwClose(TargetKeyHandle);
+        return FALSE;
+    }
+
+    /* Set the target key name as link target */
+    Status = ZwSetValueKey(TargetKeyHandle,
+                           &CmSymbolicLinkValueName,
+                           0,
+                           REG_LINK,
+                           TargetKeyName,
+                           wcslen(TargetKeyName) * sizeof(WCHAR));
+
+    /* Close the link key handle */
+    ObCloseHandle(TargetKeyHandle, KernelMode);
+
+    if (!NT_SUCCESS(Status))
+    {
+        DPRINT1("CM: CmpLinkKeyToHive: couldn't create symbolic link for %S\n",
+                TargetKeyName);
+        return FALSE;
+    }
+
+    return TRUE;
+}
+
 VOID
 NTAPI
 CmpDeleteKeyObject(PVOID DeletedObject)
@@ -1389,9 +1454,13 @@ CmpInitializeHiveList(IN USHORT Flag)
     /* Get rid of the SD */
     ExFreePoolWithTag(SecurityDescriptor, TAG_CM);
 
-    /* FIXME: Link SECURITY to SAM */
+    /* Link SECURITY to SAM */
+    CmpLinkKeyToHive(L"\\Registry\\Machine\\Security\\SAM",
+                     L"\\Registry\\Machine\\SAM\\SAM");
 
-    /* FIXME: Link S-1-5-18 to .Default */
+    /* Link S-1-5-18 to .Default */
+    CmpLinkKeyToHive(L"\\Registry\\User\\S-1-5-18",
+                     L"\\Registry\\User\\.Default");
 }
 
 BOOLEAN