From 904cb691f38a88ca4c6e5db2153afbb3bac193fc Mon Sep 17 00:00:00 2001
From: =?utf8?q?Bodo=20M=C3=B6ller?= <bodo@openssl.org>
Date: Sun, 2 Jul 2000 19:42:19 +0000
Subject: [PATCH] Return bignum '0' when BN_rand is asked for a 0 bit random
 number.

---
 crypto/bn/bn_rand.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/crypto/bn/bn_rand.c b/crypto/bn/bn_rand.c
index b1163f7ec4..21ecbc04ed 100644
--- a/crypto/bn/bn_rand.c
+++ b/crypto/bn/bn_rand.c
@@ -68,6 +68,12 @@ static int bnrand(int pseudorand, BIGNUM *rnd, int bits, int top, int bottom)
 	int ret=0,bit,bytes,mask;
 	time_t tim;
 
+	if (bits == 0)
+		{
+		BN_zero(rnd);
+		return 1;
+		}
+
 	bytes=(bits+7)/8;
 	bit=(bits-1)%8;
 	mask=0xff<<bit;
-- 
2.25.1