server: Report a default DACL for registry keys.

dlls/advapi32/tests/security.c

@@ -3007,7 +3007,9 @@ static void test_GetNamedSecurityInfoA(void)
 {
     char admin_ptr[sizeof(SID)+sizeof(ULONG)*SID_MAX_SUB_AUTHORITIES], *user;
     char system_ptr[sizeof(SID)+sizeof(ULONG)*SID_MAX_SUB_AUTHORITIES];
-    PSID admin_sid = (PSID) admin_ptr, system_sid = (PSID) system_ptr, user_sid;
+    char users_ptr[sizeof(SID)+sizeof(ULONG)*SID_MAX_SUB_AUTHORITIES];
+    PSID admin_sid = (PSID) admin_ptr, users_sid = (PSID) users_ptr;
+    PSID system_sid = (PSID) system_ptr, user_sid;
     DWORD sid_size = sizeof(admin_ptr), user_size;
     char invalid_path[] = "/an invalid file path";
     char software_key[] = "MACHINE\\Software";
@@ -3015,6 +3017,7 @@ static void test_GetNamedSecurityInfoA(void)
     SECURITY_DESCRIPTOR_CONTROL control;
     ACL_SIZE_INFORMATION acl_size;
     CHAR windows_dir[MAX_PATH];
+    int users_ace_id = -1, i;
     PSECURITY_DESCRIPTOR pSD;
     ACCESS_ALLOWED_ACE *ace;
     BOOL bret = TRUE, isNT4;
@@ -3022,8 +3025,10 @@ static void test_GetNamedSecurityInfoA(void)
     DWORD error, revision;
     BOOL owner_defaulted;
     BOOL group_defaulted;
+    BOOL dacl_defaulted;
     HANDLE token, hTemp;
     PSID owner, group;
+    BOOL dacl_present;
     PACL pDacl;
 
     if (!pSetNamedSecurityInfoA || !pGetNamedSecurityInfoA || !pCreateWellKnownSid)
@@ -3202,6 +3207,41 @@ static void test_GetNamedSecurityInfoA(void)
        || broken(((SID*)group)->SubAuthority[0] == SECURITY_NT_NON_UNIQUE) /* Vista */,
        "MACHINE\\Software group SID != Local System SID.\n");
     LocalFree(pSD);
+
+    /* Test querying the DACL of a built-in registry key */
+    sid_size = sizeof(users_ptr);
+    pCreateWellKnownSid(WinBuiltinUsersSid, NULL, users_sid, &sid_size);
+    error = pGetNamedSecurityInfoA(software_key, SE_REGISTRY_KEY, DACL_SECURITY_INFORMATION,
+                                   NULL, NULL, NULL, NULL, &pSD);
+    ok(!error, "GetNamedSecurityInfo failed with error %d\n", error);
+
+    bret = GetSecurityDescriptorDacl(pSD, &dacl_present, &pDacl, &dacl_defaulted);
+    ok(bret, "GetSecurityDescriptorDacl failed with error %d\n", GetLastError());
+    ok(dacl_present, "DACL should be present\n");
+    ok(pDacl && IsValidAcl(pDacl), "GetSecurityDescriptorDacl returned invalid DACL.\n");
+    bret = pGetAclInformation(pDacl, &acl_size, sizeof(acl_size), AclSizeInformation);
+    ok(bret, "GetAclInformation failed\n");
+    ok(acl_size.AceCount != 0, "GetAclInformation returned no ACLs\n");
+    for (i=0; i<acl_size.AceCount; i++)
+    {
+        bret = pGetAce(pDacl, i, (VOID **)&ace);
+        ok(bret, "Failed to get ACE %d.\n", i);
+        bret = EqualSid(&ace->SidStart, users_sid);
+        if (bret) users_ace_id = i;
+    }
+    ok(users_ace_id != -1, "Bultin Users ACE not found.\n");
+    if (users_ace_id != -1)
+    {
+        bret = pGetAce(pDacl, users_ace_id, (VOID **)&ace);
+        ok(bret, "Failed to get Builtin Users ACE.\n");
+        ok(((ACE_HEADER *)ace)->AceFlags == (INHERIT_ONLY_ACE|CONTAINER_INHERIT_ACE),
+           "Builtin Users ACE has unexpected flags (0x%x != 0x%x)\n", ((ACE_HEADER *)ace)->AceFlags,
+           INHERIT_ONLY_ACE|CONTAINER_INHERIT_ACE);
+        ok(ace->Mask == GENERIC_READ, "Builtin Users ACE has unexpected mask (0x%x != 0x%x)\n",
+                                      ace->Mask, GENERIC_READ);
+    }
+
+    LocalFree(pSD);
 }
 
 static void test_ConvertStringSecurityDescriptor(void)

server/registry.c

@@ -345,16 +345,33 @@ static struct security_descriptor *key_get_sd( struct object *obj )
 
     if (!key_default_sd)
     {
-        size_t sid_len = security_sid_len( security_builtin_admins_sid );
-
-        key_default_sd = mem_alloc( sizeof(*key_default_sd) + 2 * sid_len );
-        key_default_sd->control   = 0;
-        key_default_sd->owner_len = sid_len;
-        key_default_sd->group_len = sid_len;
+        size_t users_sid_len = security_sid_len( security_builtin_users_sid );
+        size_t admins_sid_len = security_sid_len( security_builtin_admins_sid );
+        size_t dacl_len = sizeof(ACL) + offsetof( ACCESS_ALLOWED_ACE, SidStart ) + users_sid_len;
+        ACCESS_ALLOWED_ACE *aaa;
+        ACL *dacl;
+
+        key_default_sd = mem_alloc( sizeof(*key_default_sd) + 2 * admins_sid_len + dacl_len );
+        key_default_sd->control   = SE_DACL_PRESENT;
+        key_default_sd->owner_len = admins_sid_len;
+        key_default_sd->group_len = admins_sid_len;
         key_default_sd->sacl_len  = 0;
-        key_default_sd->dacl_len  = 0;
-        memcpy( key_default_sd + 1, security_builtin_admins_sid, sid_len );
-        memcpy( (char *)(key_default_sd + 1) + sid_len, security_builtin_admins_sid, sid_len );
+        key_default_sd->dacl_len  = dacl_len;
+        memcpy( key_default_sd + 1, security_builtin_admins_sid, admins_sid_len );
+        memcpy( (char *)(key_default_sd + 1) + admins_sid_len, security_builtin_admins_sid, admins_sid_len );
+
+        dacl = (ACL *)((char *)(key_default_sd + 1) + 2 * admins_sid_len);
+        dacl->AclRevision = ACL_REVISION;
+        dacl->Sbz1 = 0;
+        dacl->AclSize = dacl_len;
+        dacl->AceCount = 1;
+        dacl->Sbz2 = 0;
+        aaa = (ACCESS_ALLOWED_ACE *)(dacl + 1);
+        aaa->Header.AceType = ACCESS_ALLOWED_ACE_TYPE;
+        aaa->Header.AceFlags = INHERIT_ONLY_ACE | CONTAINER_INHERIT_ACE;
+        aaa->Header.AceSize = offsetof( ACCESS_ALLOWED_ACE, SidStart ) + users_sid_len;
+        aaa->Mask = GENERIC_READ;
+        memcpy( &aaa->SidStart, security_builtin_users_sid, users_sid_len );
     }
     return key_default_sd;
 }

server/security.h

@@ -42,6 +42,7 @@ extern const LUID SeCreateGlobalPrivilege;
 extern const PSID security_world_sid;
 extern const PSID security_local_user_sid;
 extern const PSID security_local_system_sid;
+extern const PSID security_builtin_users_sid;
 extern const PSID security_builtin_admins_sid;
 
 

server/token.c

@@ -84,6 +84,13 @@ static const struct /* same fields as struct SID */
     SID_IDENTIFIER_AUTHORITY IdentifierAuthority;
     DWORD SubAuthority[2];
 } builtin_admins_sid = { SID_REVISION, 2, { SECURITY_NT_AUTHORITY }, { SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_ADMINS } };
+static const struct /* same fields as struct SID */
+{
+    BYTE Revision;
+    BYTE SubAuthorityCount;
+    SID_IDENTIFIER_AUTHORITY IdentifierAuthority;
+    DWORD SubAuthority[2];
+} builtin_users_sid = { SID_REVISION, 2, { SECURITY_NT_AUTHORITY }, { SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_USERS } };
 
 const PSID security_world_sid = (PSID)&world_sid;
 static const PSID security_local_sid = (PSID)&local_sid;
@@ -92,6 +99,7 @@ static const PSID security_authenticated_user_sid = (PSID)&authenticated_user_si
 const PSID security_local_system_sid = (PSID)&local_system_sid;
 const PSID security_local_user_sid = (PSID)&local_user_sid;
 const PSID security_builtin_admins_sid = (PSID)&builtin_admins_sid;
+const PSID security_builtin_users_sid = (PSID)&builtin_users_sid;
 
 static luid_t prev_luid_value = { 1000, 0 };