Commit daac87be authored by Dr. Stephen Henson's avatar Dr. Stephen Henson
Browse files

clarify comment

parent e9735943

crypto/rand/md_rand.c

+7 −4
Changes for crypto/rand/md_rand.c: 7 added lines, 4 removed lines.
Original line number Diff line number Diff line
@@ -476,11 +476,14 @@ static int ssleay_rand_bytes(unsigned char *buf, int num) 
		MD_Update(&m,(unsigned char *)&(md_c[0]),sizeof(md_c));



#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.

		 */

		MD_Update(&m,buf,j);

		/* 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;