3 files changed, 174 insertions, 0 deletions

diff --git a/src/acl/ntapi_acl_helper.c b/src/acl/ntapi_acl_helper.c
index 40fe4c4..024dbd4 100644
--- a/src/acl/ntapi_acl_helper.c
+++ b/src/acl/ntapi_acl_helper.c
@@ -98,3 +98,175 @@ void __stdcall __ntapi_acl_init_common_descriptor(
 	sd->dacl.ace_count      = ace_count;
 	sd->dacl.sbz_2nd        = 0;
 }
+
+static int32_t __acl_init_common_meta_impl(
+	__out	nt_sd_common_meta *	meta,
+	__in	nt_sd *			sd)
+{
+	int			i;
+	nt_sid *		sid;
+	nt_acl *		acl;
+	nt_access_allowed_ace *	ace;
+	unsigned char *		value;
+	unsigned char		sacnt;
+	char *			mark = (char *)sd;
+
+	meta->sd    = sd;
+	meta->owner = sd->offset_owner ? (nt_sid *)(mark + sd->offset_owner) : 0;
+	meta->group = 0;
+	meta->dacl  = sd->offset_dacl  ? (nt_acl *)(mark + sd->offset_dacl) : 0;
+
+	meta->owner_ace  = 0;
+	meta->owner_sid  = 0;
+	meta->group_ace  = 0;
+	meta->group_sid  = 0;
+	meta->other_ace  = 0;
+	meta->other_sid  = 0;
+	meta->admin_ace  = 0;
+	meta->admin_sid  = 0;
+	meta->system_acc = 0;
+
+	if (!meta->owner)
+		return NT_STATUS_INVALID_OWNER;
+
+	if (!(acl = meta->dacl))
+		return NT_STATUS_SUCCESS;
+
+	if (acl->ace_count == 0)
+		return NT_STATUS_SUCCESS;
+
+	if (acl->ace_count > 5)
+		return NT_STATUS_NOT_SUPPORTED;
+
+	ace = (nt_access_allowed_ace *)&acl[1];
+
+	for (i=0; i<acl->ace_count; i++) {
+		if (ace->header.ace_type != NT_ACE_TYPE_ACCESS_ALLOWED)
+			return NT_STATUS_NOT_SUPPORTED;
+
+		mark = (char *)ace + ace->header.ace_size;
+		ace  = (nt_access_allowed_ace *)mark;
+	}
+
+	ace = (nt_access_allowed_ace *)&acl[1];
+
+	for (i=0; i<acl->ace_count; i++) {
+		sid   = (nt_sid *)&ace->sid_start;
+		value = sid->identifier_authority.value;
+
+		if (!(__ntapi->tt_sid_compare(sid,&sid_system)))
+			meta->system_acc = ace->mask;
+
+		else if (!(__ntapi->tt_sid_compare(sid,&sid_owner_rights))) {
+			if (meta->owner_ace)
+				return NT_STATUS_INVALID_ACL;
+
+			meta->owner_ace = ace;
+			meta->owner_sid = sid;
+		}
+
+		else if (!(__ntapi->tt_sid_compare(sid,&sid_auth_users))) {
+			if (meta->other_ace)
+				return NT_STATUS_INVALID_ACL;
+
+			meta->other_ace = ace;
+			meta->other_sid = sid;
+		}
+
+		else if (!(__ntapi->tt_sid_compare(sid,meta->owner))) {
+			if (meta->group_ace)
+				return NT_STATUS_INVALID_ACL;
+
+			meta->group_ace = ace;
+			meta->group_sid = sid;
+		}
+
+		else if (!(__ntapi->tt_sid_compare(sid,(nt_sid *)&sid_admins))) {
+			if (meta->admin_ace)
+				return NT_STATUS_INVALID_ACL;
+
+			meta->admin_ace = ace;
+			meta->admin_sid = sid;
+		}
+
+		else if ((value[0] == 0) && (value[1] == 0)
+				&& (value[2] == 0) && (value[3] == 0)
+				&& (value[4] == 0) && (value[5] == 5)
+				&& (sid->sub_authority[0] == 21)
+				&& ((sacnt = sid->sub_authority_count))
+				&& (sid->sub_authority[sacnt - 1] == 500)) {
+			if (meta->admin_ace)
+				return NT_STATUS_INVALID_ACL;
+
+			meta->admin_ace = ace;
+			meta->admin_sid = sid;
+		}
+
+		else {
+			if (meta->group_ace)
+				return NT_STATUS_INVALID_ACL;
+
+			meta->group_ace = ace;
+			meta->group_sid = sid;
+			meta->group     = sid;
+		}
+
+		mark = (char *)ace + ace->header.ace_size;
+		ace  = (nt_access_allowed_ace *)mark;
+	}
+
+	return NT_STATUS_SUCCESS;
+}
+
+static int32_t __acl_init_common_meta_strict(
+	__out	nt_sd_common_meta *	meta,
+	__in	nt_sd *			sd)
+{
+	int32_t			status;
+	nt_sd_common_meta	m;
+
+	if ((status = __acl_init_common_meta_impl(&m,sd)))
+		return status;
+
+	meta->sd    = m.sd;
+	meta->owner = m.owner;
+	meta->group = m.group;
+	meta->dacl  = m.dacl;
+
+	meta->owner_ace  = m.owner_ace;
+	meta->owner_sid  = m.owner_sid;
+	meta->group_ace  = m.group_ace;
+	meta->group_sid  = m.group_sid;
+	meta->other_ace  = m.other_ace;
+	meta->other_sid  = m.other_sid;
+	meta->admin_ace  = m.admin_ace;
+	meta->admin_sid  = m.admin_sid;
+	meta->system_acc = 0;
+
+	return NT_STATUS_SUCCESS;
+}
+
+static int32_t __acl_init_common_meta_query(
+	__out	nt_sd_common_meta *	meta,
+	__in	nt_sd *			sd)
+{
+	__acl_init_common_meta_impl(meta,sd);
+	return NT_STATUS_SUCCESS;
+}
+
+int32_t __stdcall __ntapi_acl_init_common_descriptor_meta(
+	__out	nt_sd_common_meta *	meta,
+	__in	nt_sd *			sd,
+	__in	uint32_t		options)
+{
+	switch (options) {
+		case NT_ACL_INIT_COMMON_DESCRIPTION_META_QUERY_MODE:
+			return __acl_init_common_meta_query(meta,sd);
+
+		case NT_ACL_INIT_COMMON_DESCRIPTION_META_STRICT_MODE:
+			return __acl_init_common_meta_strict(meta,sd);
+
+		default:
+			return NT_STATUS_INVALID_PARAMETER;
+	}
+}
diff --git a/src/internal/ntapi.c b/src/internal/ntapi.c
index aaf1b33..af9d4c0 100644
--- a/src/internal/ntapi.c
+++ b/src/internal/ntapi.c
@@ -355,6 +355,7 @@ static int32_t __fastcall __ntapi_init_once(ntapi_vtbl ** pvtbl)
 
 	/* nt_acl.h */
 	__ntapi->acl_init_common_descriptor			= __ntapi_acl_init_common_descriptor;
+	__ntapi->acl_init_common_descriptor_meta			= __ntapi_acl_init_common_descriptor_meta;
 
 	/* nt_vfd.h */
 	__ntapi->vfd_dev_name_init				= __ntapi_vfd_dev_name_init;
diff --git a/src/internal/ntapi_fnapi.h b/src/internal/ntapi_fnapi.h
index 5aaae4c..90d9338 100644
--- a/src/internal/ntapi_fnapi.h
+++ b/src/internal/ntapi_fnapi.h
@@ -222,6 +222,7 @@ ntapi_dsr_internal_client_connect		__ntapi_dsr_internal_client_connect;
 
 /* nt_acl.h */
 ntapi_acl_init_common_descriptor		__ntapi_acl_init_common_descriptor;
+ntapi_acl_init_common_descriptor_meta		__ntapi_acl_init_common_descriptor_meta;
 
 /* nt_vfd.h */
 ntapi_vfd_dev_name_init				__ntapi_vfd_dev_name_init;