1 files changed, 14 insertions, 0 deletions
diff --git a/ext/ed25519-amd64-asm/fe25519_iseq.c b/ext/ed25519-amd64-asm/fe25519_iseq.c
new file mode 100644
index 00000000..bf72f8c9
--- /dev/null
+++ b/ext/ed25519-amd64-asm/fe25519_iseq.c
@@ -0,0 +1,14 @@
+#include "fe25519.h"
+
+int fe25519_iseq_vartime(const fe25519 *x, const fe25519 *y)
+{
+  fe25519 t1 = *x;
+  fe25519 t2 = *y;
+  fe25519_freeze(&t1);
+  fe25519_freeze(&t2);
+  if(t1.v[0] != t2.v[0]) return 0;
+  if(t1.v[1] != t2.v[1]) return 0;
+  if(t1.v[2] != t2.v[2]) return 0;
+  if(t1.v[3] != t2.v[3]) return 0;
+  return 1;
+}