From 40864da53391b111f0c554f46bd8f64ee884c554 Mon Sep 17 00:00:00 2001
From: Sean Parkinson <sean@wolfssl.com>
Date: Tue, 2 Jul 2019 14:37:43 +1000
Subject: [PATCH] Fix prime testing to do t iterations of random values in
 range

---
 wolfcrypt/src/integer.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/wolfcrypt/src/integer.c b/wolfcrypt/src/integer.c
index f1f1b25d3..ca6627048 100644
--- a/wolfcrypt/src/integer.c
+++ b/wolfcrypt/src/integer.c
@@ -4654,8 +4654,10 @@ int mp_prime_is_prime_ex (mp_int * a, int t, int *result, WC_RNG *rng)
         goto LBL_B;
     }
 
-    if (mp_cmp_d(&b, 2) != MP_GT || mp_cmp(&b, &c) != MP_LT)
+    if (mp_cmp_d(&b, 2) != MP_GT || mp_cmp(&b, &c) != MP_LT) {
+        ix--;
         continue;
+    }
 
     if ((err = mp_prime_miller_rabin (a, &b, &res)) != MP_OKAY) {
       goto LBL_B;