From e8d2609f81bee0c03641ad8d11404c91a71eb77f Mon Sep 17 00:00:00 2001
From: Steffen Jaeckel <s@jaeckel.eu>
Date: Tue, 12 Jan 2016 13:48:37 +0100
Subject: [PATCH] mp_jacobi: error-out until #44 is fixed

---
 bn_mp_jacobi.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/bn_mp_jacobi.c b/bn_mp_jacobi.c
index 8be097a..3c114e3 100644
--- a/bn_mp_jacobi.c
+++ b/bn_mp_jacobi.c
@@ -26,6 +26,11 @@ int mp_jacobi (mp_int * a, mp_int * n, int *c)
   int     k, s, r, res;
   mp_digit residue;
 
+  /* if a < 0 return MP_VAL */
+  if (mp_isneg(a) == MP_YES) {
+     return MP_VAL;
+  }
+
   /* if n <= 0 return MP_VAL */
   if (mp_cmp_d(n, 0) != MP_GT) {
      return MP_VAL;