diff options
Diffstat (limited to 'sys/dev/rnd.c')
| -rw-r--r-- | sys/dev/rnd.c | 20 |
1 files changed, 2 insertions, 18 deletions
diff --git a/sys/dev/rnd.c b/sys/dev/rnd.c index 9eaeab366ee..3225b82a10b 100644 --- a/sys/dev/rnd.c +++ b/sys/dev/rnd.c @@ -1,4 +1,4 @@ -/* $OpenBSD: rnd.c,v 1.120 2011/01/01 01:41:02 deraadt Exp $ */ +/* $OpenBSD: rnd.c,v 1.121 2011/01/01 19:43:04 deraadt Exp $ */ /* * Copyright (c) 1996, 1997, 2000-2002 Michael Shalayeff. @@ -351,10 +351,7 @@ extract_entropy(u_int8_t *buf, int nbytes) add_timer_randomness(nbytes); while (nbytes) { - if (nbytes < sizeof(buffer) / 2) - i = nbytes; - else - i = sizeof(buffer) / 2; + i = MIN(nbytes, sizeof(buffer)); /* Hash the pool to get the output */ MD5Init(&tmp); @@ -368,19 +365,6 @@ extract_entropy(u_int8_t *buf, int nbytes) mtx_leave(&rndlock); MD5Final(buffer, &tmp); - /* - * In case the hash function has some recognizable - * output pattern, we fold it in half. - */ - buffer[0] ^= buffer[15]; - buffer[1] ^= buffer[14]; - buffer[2] ^= buffer[13]; - buffer[3] ^= buffer[12]; - buffer[4] ^= buffer[11]; - buffer[5] ^= buffer[10]; - buffer[6] ^= buffer[ 9]; - buffer[7] ^= buffer[ 8]; - /* Copy data to destination buffer */ bcopy(buffer, buf, i); nbytes -= i; |