diff options
author | Damien Miller <djm@mindrot.org> | 2010-07-16 13:57:51 +1000 |
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committer | Damien Miller <djm@mindrot.org> | 2010-07-16 13:57:51 +1000 |
commit | 8a0268f1b3f62292d4124f8d158e0587c4f7c330 (patch) | |
tree | 43493a3202569a2939f5616127d9de8689613a7b /packet.c | |
parent | d0244d498ba970b9d9348429eaf7a4a0ef2b903c (diff) | |
download | openssh-git-8a0268f1b3f62292d4124f8d158e0587c4f7c330.tar.gz |
- djm@cvs.openbsd.org 2010/07/13 11:52:06
[auth-rsa.c channels.c jpake.c key.c misc.c misc.h monitor.c]
[packet.c ssh-rsa.c]
implement a timing_safe_cmp() function to compare memory without leaking
timing information by short-circuiting like memcmp() and use it for
some of the more sensitive comparisons (though nothing high-value was
readily attackable anyway); "looks ok" markus@
Diffstat (limited to 'packet.c')
-rw-r--r-- | packet.c | 4 |
1 files changed, 2 insertions, 2 deletions
@@ -1,4 +1,4 @@ -/* $OpenBSD: packet.c,v 1.166 2009/06/27 09:29:06 andreas Exp $ */ +/* $OpenBSD: packet.c,v 1.167 2010/07/13 11:52:06 djm Exp $ */ /* * Author: Tatu Ylonen <ylo@cs.hut.fi> * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland @@ -1307,7 +1307,7 @@ packet_read_poll2(u_int32_t *seqnr_p) macbuf = mac_compute(mac, active_state->p_read.seqnr, buffer_ptr(&active_state->incoming_packet), buffer_len(&active_state->incoming_packet)); - if (memcmp(macbuf, buffer_ptr(&active_state->input), + if (timing_safe_cmp(macbuf, buffer_ptr(&active_state->input), mac->mac_len) != 0) { logit("Corrupted MAC on input."); if (need > PACKET_MAX_SIZE) |