From da50f9d581c7921f15157441f5abbb6c6381891f Mon Sep 17 00:00:00 2001
From: jsing <jsing@openbsd.org>
Date: Wed, 21 Jun 2023 07:16:08 +0000
Subject: [PATCH] Add BN_cmp()/BN_ucmp() tests with zero padded inputs.

Currently BN_hex2bn() removes the leading zeros, however this will not be
the case in the future.
---
 regress/lib/libcrypto/bn/bn_cmp.c | 26 +++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/regress/lib/libcrypto/bn/bn_cmp.c b/regress/lib/libcrypto/bn/bn_cmp.c
index 2f5c7c02e7f..047fac3ba9e 100644
--- a/regress/lib/libcrypto/bn/bn_cmp.c
+++ b/regress/lib/libcrypto/bn/bn_cmp.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: bn_cmp.c,v 1.1 2022/11/30 02:51:05 jsing Exp $ */
+/*	$OpenBSD: bn_cmp.c,v 1.2 2023/06/21 07:16:08 jsing Exp $ */
 /*
  * Copyright (c) 2022 Joel Sing <jsing@openbsd.org>
  *
@@ -75,6 +75,30 @@ struct bn_cmp_test bn_cmp_tests[] = {
 		.cmp = -1,
 		.ucmp = 1,
 	},
+	{
+		.a = "1ffffffffffffffff",
+		.b = "00000000000000001ffffffffffffffff",
+		.cmp = 0,
+		.ucmp = 0,
+	},
+	{
+		.a = "-1ffffffffffffffff",
+		.b = "-00000000000000001ffffffffffffffff",
+		.cmp = 0,
+		.ucmp = 0,
+	},
+	{
+		.a = "1ffffffffffffffff",
+		.b = "-00000000000000001ffffffffffffffff",
+		.cmp = 1,
+		.ucmp = 0,
+	},
+	{
+		.a = "-1ffffffffffffffff",
+		.b = "00000000000000001ffffffffffffffff",
+		.cmp = -1,
+		.ucmp = 0,
+	},
 };
 
 #define N_BN_CMP_TESTS \
-- 
2.20.1