1 files changed, 5 insertions, 8 deletions

diff --git a/src/regress/lib/libcrypto/bn/bn_mod_exp.c b/src/regress/lib/libcrypto/bn/bn_mod_exp.c
index 236851bc75..f7be5110ea 100644
--- a/src/regress/lib/libcrypto/bn/bn_mod_exp.c
+++ b/src/regress/lib/libcrypto/bn/bn_mod_exp.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: bn_mod_exp.c,v 1.5 2022/12/02 18:31:40 tb Exp $       */
+/*      $OpenBSD: bn_mod_exp.c,v 1.6 2022/12/03 08:05:52 tb Exp $       */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -73,7 +73,7 @@ main(int argc, char *argv[])
         BIGNUM *r_mont, *r_mont_const, *r_recp, *r_simple;
         BIGNUM *r_mont_ct, *r_mont_nonct, *a, *b, *m;
         BN_CTX *ctx;
-        unsigned char c;
+        int c;
         int i, ret;
 
         ERR_load_BN_strings();
@@ -103,18 +103,15 @@ main(int argc, char *argv[])
                 goto err;
 
         for (i = 0; i < 200; i++) {
-                arc4random_buf(&c, 1);
-                c = (c % BN_BITS) - BN_BITS2;
+                c = (arc4random() % BN_BITS) - BN_BITS2;
                 if (!BN_rand(a, NUM_BITS + c, 0, 0))
                         goto err;
 
-                arc4random_buf(&c, 1);
-                c = (c % BN_BITS) - BN_BITS2;
+                c = (arc4random() % BN_BITS) - BN_BITS2;
                 if (!BN_rand(b, NUM_BITS + c, 0, 0))
                         goto err;
 
-                arc4random_buf(&c, 1);
-                c = (c % BN_BITS) - BN_BITS2;
+                c = (arc4random() % BN_BITS) - BN_BITS2;
                 if (!BN_rand(m, NUM_BITS + c, 0, 1))
                         goto err;