From b65c659b2c1b5af299b2ac7e5d318d8af6f97647 Mon Sep 17 00:00:00 2001
From: tb <>
Date: Tue, 6 Nov 2018 06:55:27 +0000
Subject: add a regression test for bn_rand_interval()
---
src/regress/lib/libcrypto/bn/rand/Makefile | 11 +++
.../lib/libcrypto/bn/rand/bn_rand_interval.c | 87 ++++++++++++++++++++++
2 files changed, 98 insertions(+)
create mode 100644 src/regress/lib/libcrypto/bn/rand/Makefile
create mode 100644 src/regress/lib/libcrypto/bn/rand/bn_rand_interval.c
diff --git a/src/regress/lib/libcrypto/bn/rand/Makefile b/src/regress/lib/libcrypto/bn/rand/Makefile
new file mode 100644
index 0000000000..52d0835df4
--- /dev/null
+++ b/src/regress/lib/libcrypto/bn/rand/Makefile
@@ -0,0 +1,11 @@
+# $OpenBSD: Makefile,v 1.1 2018/11/06 06:55:27 tb Exp $
+
+.include "../../Makefile.inc"
+
+PROG= bn_rand_interval
+LDADD= ${CRYPTO_INT}
+DPADD= ${LIBCRYPTO}
+WARNINGS= Yes
+CFLAGS+= -Werror
+
+.include <bsd.regress.mk>
diff --git a/src/regress/lib/libcrypto/bn/rand/bn_rand_interval.c b/src/regress/lib/libcrypto/bn/rand/bn_rand_interval.c
new file mode 100644
index 0000000000..57c55f0496
--- /dev/null
+++ b/src/regress/lib/libcrypto/bn/rand/bn_rand_interval.c
@@ -0,0 +1,87 @@
+/* $OpenBSD: bn_rand_interval.c,v 1.1 2018/11/06 06:55:27 tb Exp $ */
+/*
+ * Copyright (c) 2018 Theo Buehler <tb@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <err.h>
+#include <stdio.h>
+
+#include <openssl/bn.h>
+
+#define NUM_TESTS 1000000
+
+int bn_rand_interval(BIGNUM *rnd, const BIGNUM *lower_incl,
+ const BIGNUM *upper_excl);
+
+
+int
+main(int argc, char *argv[])
+{
+ BIGNUM *a, *b, *x;
+ int i, success = 1;
+
+ if ((a = BN_new()) == NULL)
+ err(1, "BN_hex2bn");
+ if ((b = BN_new()) == NULL)
+ err(1, "BN_hex2bn");
+ if ((x = BN_new()) == NULL)
+ err(1, "BN_new()");
+
+ for (i = 0; i < NUM_TESTS; i++) {
+ if (!BN_rand(a, 256, 0, 0))
+ err(1, "BN_rand(a)");
+
+ if (bn_rand_interval(x, a, a) != 0) {
+ success = 0;
+ printf("bn_rand_interval(a == a) succeeded\n");
+ }
+
+ if (!BN_rand(b, 256, 0, 0))
+ err(1, "BN_rand(b)");
+
+ switch(BN_cmp(a, b)) {
+ case 0: /* a == b */
+ continue;
+
+ case 1: /* a > b */
+ BN_swap(a, b);
+ break;
+
+ default: /* a < b */
+ break;
+ }
+
+ if (!bn_rand_interval(x, a, b))
+ err(1, "bn_rand_interval() failed");
+
+ if (BN_cmp(x, a) < 0 || BN_cmp(x, b) >= 0) {
+ printf("generated number xnot inside [a,b)\n");
+ printf("a = ");
+ BN_print_fp(stdout, a);
+ printf("\nb = ");
+ BN_print_fp(stdout, b);
+ printf("\nx = ");
+ BN_print_fp(stdout, x);
+ printf("\n");
+ }
+ }
+
+ if (success == 1)
+ printf("success\n");
+ else
+ printf("FAIL");
+
+ return 1 - success;
+}
--
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