Commit cd29ced6 authored by Dr. Stephen Henson's avatar Dr. Stephen Henson
Browse files

Return if ssleay_rand_add called with zero num. 

Treat a zero length passed to ssleay_rand_add a no op: the existing logic
zeroes the md value which is very bad. OpenSSL itself never does this
internally and the actual call doesn't make sense as it would be passing
zero bytes of entropy.

Thanks to Marcus Meissner <meissner@suse.de> for reporting this bug.
(cherry picked from commit 5be1ae28)
parent 7e840163

crypto/rand/md_rand.c

+3 −0
Original line number Diff line number Diff line
@@ -198,6 +198,9 @@ static void ssleay_rand_add(const void *buf, int num, double add) 
	EVP_MD_CTX m;

	int do_not_lock;



	if (!num)

		return;



	/*

	 * (Based on the rand(3) manpage)

	 *