1. 15 Jan, 2012 1 commit
    • Alexey Dobriyan's avatar
      crypto: sha512 - make it work, undo percpu message schedule · 84e31fdb
      Alexey Dobriyan authored
      commit f9e2bca6
      aka "crypto: sha512 - Move message schedule W[80] to static percpu area"
      created global message schedule area.
      
      If sha512_update will ever be entered twice, hash will be silently
      calculated incorrectly.
      
      Probably the easiest way to notice incorrect hashes being calculated is
      to run 2 ping floods over AH with hmac(sha512):
      
      	#!/usr/sbin/setkey -f
      	flush;
      	spdflush;
      	add IP1 IP2 ah 25 -A hmac-sha512 0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000025;
      	add IP2 IP1 ah 52 -A hmac-sha512 0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000052;
      	spdadd IP1 IP2 any -P out ipsec ah/transport//require;
      	spdadd IP2 IP1 any -P in  ipsec ah/transport//require;
      
      XfrmInStateProtoError will start ticking with -EBADMSG being returned
      from ah_input(). This never happens with, say, hmac(sha1).
      
      With patch applied (on BOTH sides), XfrmInStateProtoError does not tick
      with multiple bidirectional ping flood streams like it doesn't tick
      with SHA-1.
      
      After this patch sha512_transform() will start using ~750 bytes of stack on x86_64.
      This is OK for simple loads, for something more heavy, stack reduction will be done
      separatedly.
      Signed-off-by: default avatarAlexey Dobriyan <adobriyan@gmail.com>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
      84e31fdb
  2. 20 Dec, 2011 15 commits
  3. 30 Nov, 2011 5 commits
  4. 21 Nov, 2011 10 commits
  5. 09 Nov, 2011 9 commits