[reactos] 01/01: [NTOS:SE] Set the SACL to the World security descriptor

[George Bișoc]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=f341b9080b2840de23467…

commit f341b9080b2840de23467996fcd413740e4354a1
Author:     George Bișoc <george.bisoc(a)reactos.org>
AuthorDate: Tue Sep 21 19:52:10 2021 +0200
Commit:     George Bișoc <george.bisoc(a)reactos.org>
CommitDate: Fri Sep 24 19:13:16 2021 +0200

    [NTOS:SE] Set the SACL to the World security descriptor
    
    Implement the portion chunk of code that is responsible for setting the system access
control list (SACL) to the World security descriptor, based from SeWorldSid (World
security identifier).
---
 ntoskrnl/se/sd.c | 25 ++++++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/ntoskrnl/se/sd.c b/ntoskrnl/se/sd.c
index ed5d83b65e9..76584c2c5c0 100644
--- a/ntoskrnl/se/sd.c
+++ b/ntoskrnl/se/sd.c
@@ -181,6 +181,10 @@ SeSetWorldSecurityDescriptor(
     {
         SdSize += sizeof(ACL) + sizeof(ACE) + SidSize;
     }
+    if (SecurityInformation & SACL_SECURITY_INFORMATION)
+    {
+        SdSize += sizeof(ACL) + sizeof(ACE) + SidSize;
+    }
 
     if (*BufferLength < SdSize)
     {
@@ -236,7 +240,26 @@ SeSetWorldSecurityDescriptor(
 
     if (SecurityInformation & SACL_SECURITY_INFORMATION)
     {
-        /* FIXME - SdRel->Control |= SE_SACL_PRESENT; */
+        PACL Sacl = (PACL)((PUCHAR)SdRel + Current);
+
+        Status = RtlCreateAcl(Sacl,
+                              sizeof(ACL) + sizeof(ACE) + SidSize,
+                              ACL_REVISION);
+        if (!NT_SUCCESS(Status))
+            return Status;
+
+        Status = RtlAddAuditAccessAce(Sacl,
+                                      ACL_REVISION,
+                                      ACCESS_SYSTEM_SECURITY | STANDARD_RIGHTS_ALL,
+                                      SeWorldSid,
+                                      TRUE,
+                                      TRUE);
+        if (!NT_SUCCESS(Status))
+            return Status;
+
+        SdRel->Control |= SE_SACL_PRESENT;
+        SdRel->Sacl = Current;
+        Current += SidSize;
     }
 
     return STATUS_SUCCESS;