whirlpool_test: avoid calling arc4random_uniform(0)

This causes a SIGFPE on solaris
Fixes https://github.com/libressl/portable/issues/1042

diff --git a/regress/lib/libcrypto/whirlpool/whirlpool_test.c b/regress/lib/libcrypto/whirlpool/whirlpool_test.c
index 940531d..809edbb 100644 (file)
--- a/regress/lib/libcrypto/whirlpool/whirlpool_test.c
+++ b/regress/lib/libcrypto/whirlpool/whirlpool_test.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: whirlpool_test.c,v 1.2 2024/04/09 18:08:43 tb Exp $ */
+/*     $OpenBSD: whirlpool_test.c,v 1.3 2024/04/09 18:12:11 tb Exp $ */
 /*
  * Copyright (c) 2024 Joshua Sing <joshua@joshuasing.dev>
  *
@@ -192,7 +192,9 @@ whirlpool_test(void)
                }
 
                for (l = 0; l < wt->in_len;) {
-                       in_len = arc4random_uniform(wt->in_len / 2);
+                       in_len = 1;
+                       if (wt->in_len > 1)
+                               in_len = arc4random_uniform(wt->in_len / 2);
                        if (in_len < 1)
                                in_len = 1;
                        if (in_len > wt->in_len - l)