sid helper interfaces: added ntapi_tt_sid_compare().

1 files changed, 30 insertions, 0 deletions

diff --git a/src/object/ntapi_tt_sid.c b/src/object/ntapi_tt_sid.c
index d93775c..a35b9a7 100644
--- a/src/object/ntapi_tt_sid.c
+++ b/src/object/ntapi_tt_sid.c
@@ -21,3 +21,33 @@ void __stdcall __ntapi_tt_sid_copy(
 	for (i=0; i<src->sub_authority_count; i++)
 		dst->sub_authority[i] = src->sub_authority[i];
 }
+
+int32_t __stdcall __ntapi_tt_sid_compare(
+	__in	const nt_sid *	sida,
+	__in	const nt_sid *	sidb)
+{
+	int			i;
+	int32_t			a;
+	int32_t			b;
+	const unsigned char *	va;
+	const unsigned char *	vb;
+
+	if ((a = sida->revision) - (b = sidb->revision))
+		return a-b;
+
+	if ((a = sida->sub_authority_count) - (b = sidb->sub_authority_count))
+		return a-b;
+
+	va=sida->identifier_authority.value;
+	vb=sidb->identifier_authority.value;
+
+	for (i=0; i<6; i++)
+		if ((a = va[i]) - (b = vb[i]))
+			return a-b;
+
+	for (i=0; i<sida->sub_authority_count; i++)
+		if ((a = sida->sub_authority[i]) - (b = sidb->sub_authority[i]))
+			return a-b;
+
+	return 0;
+}