1 files changed, 5 insertions, 3 deletions

diff --git a/src/lib/libcrypto/ec/ecp_smpl.c b/src/lib/libcrypto/ec/ecp_smpl.c
index 96c1e8a278..24054a51c5 100644
--- a/src/lib/libcrypto/ec/ecp_smpl.c
+++ b/src/lib/libcrypto/ec/ecp_smpl.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: ecp_smpl.c,v 1.24 2018/11/05 23:54:27 tb Exp $ */
+/* $OpenBSD: ecp_smpl.c,v 1.25 2018/11/06 02:14:39 tb Exp $ */
 /* Includes code written by Lenka Fibikova <fibikova@exp-math.uni-essen.de>
  * for the OpenSSL project.
  * Includes code written by Bodo Moeller for the OpenSSL project.
@@ -1434,8 +1434,10 @@ ec_GFp_simple_blind_coordinates(const EC_GROUP *group, EC_POINT *p, BN_CTX *ctx)
                 goto err;
 
         /* Generate lambda in [1, group->field - 1] */
-        if (!bn_rand_interval(lambda, BN_value_one(), &group->field))
-                goto err;
+        do {
+                if (!BN_rand_range(lambda, &group->field))
+                        goto err;
+        } while (BN_is_zero(lambda));
 
         if (group->meth->field_encode != NULL &&
             !group->meth->field_encode(group, lambda, lambda, ctx))