diff options
author | Damien Miller <djm@mindrot.org> | 2010-07-16 13:57:51 +1000 |
---|---|---|
committer | Damien Miller <djm@mindrot.org> | 2010-07-16 13:57:51 +1000 |
commit | 8a0268f1b3f62292d4124f8d158e0587c4f7c330 (patch) | |
tree | 43493a3202569a2939f5616127d9de8689613a7b /key.c | |
parent | d0244d498ba970b9d9348429eaf7a4a0ef2b903c (diff) |
- 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 'key.c')
-rw-r--r-- | key.c | 5 |
1 files changed, 3 insertions, 2 deletions
@@ -1,4 +1,4 @@ -/* $OpenBSD: key.c,v 1.88 2010/05/07 11:30:29 djm Exp $ */ +/* $OpenBSD: key.c,v 1.89 2010/07/13 11:52:06 djm Exp $ */ /* * read_bignum(): * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland @@ -52,6 +52,7 @@ #include "uuencode.h" #include "buffer.h" #include "log.h" +#include "misc.h" #include "ssh2.h" static struct KeyCert * @@ -227,7 +228,7 @@ cert_compare(struct KeyCert *a, struct KeyCert *b) return 0; if (buffer_len(&a->certblob) != buffer_len(&b->certblob)) return 0; - if (memcmp(buffer_ptr(&a->certblob), buffer_ptr(&b->certblob), + if (timing_safe_cmp(buffer_ptr(&a->certblob), buffer_ptr(&b->certblob), buffer_len(&a->certblob)) != 0) return 0; return 1; |