From: jsing <jsing@openbsd.org>
Date: Tue, 31 Jan 2023 05:12:16 +0000 (+0000)
Subject: Add more regress tests for BN_usub().
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=3879165ed9e5a93bd2045caa856e4bf3d699a16a;p=openbsd

Add more regress tests for BN_usub().

This adds more tests for BN_usub(), particularly where b > a, which should
be an error condition. One of these currently succeeds and produces
incorrect results.
---

diff --git a/regress/lib/libcrypto/bn/bn_add_sub.c b/regress/lib/libcrypto/bn/bn_add_sub.c
index 13af33fe9a0..2901dcbc85b 100644
--- a/regress/lib/libcrypto/bn/bn_add_sub.c
+++ b/regress/lib/libcrypto/bn/bn_add_sub.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: bn_add_sub.c,v 1.2 2022/12/02 00:01:06 tb Exp $	*/
+/*	$OpenBSD: bn_add_sub.c,v 1.3 2023/01/31 05:12:16 jsing Exp $	*/
 /*
  * Copyright (c) 2018 Theo Buehler <tb@openbsd.org>
  *
@@ -129,6 +129,13 @@ struct hexinput_st test_bn_usub[] = {
 		1,
 		1,
 	},
+	{
+		"11100000001",
+		"100000000001000000000",
+		"0",
+		0,
+		0,
+	},
 	{
 		"100000000000000000000",
 		"1",
@@ -136,6 +143,20 @@ struct hexinput_st test_bn_usub[] = {
 		1,
 		1,
 	},
+	{
+		"1",
+		"0",
+		"1",
+		1,
+		1,
+	},
+	{
+		"1",
+		"2",
+		"FFFFFFFFFFFFFFFF",
+		0,
+		0,
+	},
 	{
 		"0",
 		"1",