Commit a7c64928 authored by Dr. Stephen Henson's avatar Dr. Stephen Henson
Browse files

clarify comment

parent c8bbd98a

crypto/rand/md_rand.c

+7 −4
Original line number Diff line number Diff line
@@ -492,12 +492,15 @@ static int ssleay_rand_bytes(unsigned char *buf, int num) 
			goto err;



#ifndef PURIFY /* purify complains */

		/* DO NOT REMOVE THE FOLLOWING CALL TO MD_Update()! */

		/* The following line uses the supplied buffer as a small

		 * source of entropy: since this buffer is often uninitialised

		 * it may cause programs such as purify or valgrind to

		 * complain. So for those builds it is not used: the removal

		 * of such a small source of entropy has negligible impact on

		 * security.

		 */

		if (!MD_Update(&m,buf,j))

			goto err;

		/* We know that line may cause programs such as

		   purify and valgrind to complain about use of

		   uninitialized data.  */

#endif



		k=(st_idx+MD_DIGEST_LENGTH/2)-st_num;