|author||David S. Miller <firstname.lastname@example.org>||2011-08-03 20:50:44 -0700|
|committer||David S. Miller <email@example.com>||2011-08-06 18:33:19 -0700|
|parent||crypto: Move md5_transform to lib/md5.c (diff)|
net: Compute protocol sequence numbers and fragment IDs using MD5.
Computers have become a lot faster since we compromised on the partial MD4 hash which we use currently for performance reasons. MD5 is a much safer choice, and is inline with both RFC1948 and other ISS generators (OpenBSD, Solaris, etc.) Furthermore, only having 24-bits of the sequence number be truly unpredictable is a very serious limitation. So the periodic regeneration and 8-bit counter have been removed. We compute and use a full 32-bit sequence number. For ipv6, DCCP was found to use a 32-bit truncated initial sequence number (it needs 43-bits) and that is fixed here as well. Reported-by: Dan Kaminsky <firstname.lastname@example.org> Tested-by: Willy Tarreau <email@example.com> Signed-off-by: David S. Miller <firstname.lastname@example.org>
Diffstat (limited to 'net/ipv4/inetpeer.c')
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/inetpeer.c b/net/ipv4/inetpeer.c
index e38213817d0a..86f13c67ea85 100644
@@ -19,6 +19,7 @@
* Theory of operations.