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gss_krb5: Use confounder length in wrap code

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All encryption types use a confounder at the beginning of the
wrap token.  In all encryption types except arcfour-hmac, the
confounder is the same as the blocksize.  arcfour-hmac has a
blocksize of one, but uses an eight byte confounder.

Add an entry to the crypto framework definitions for the
confounder length and change the wrap/unwrap code to use
the confounder length rather than assuming it is always
the blocksize.

Signed-off-by: Kevin Coffman <kwc@citi.umich.edu>
Signed-off-by: Steve Dickson <steved@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Kevin Coffman 2010-03-17 13:03:05 -04:00 • committed by Trond Myklebust
parent 1dbd9029f3
commit 5af46547ec
4 changed files with 17 additions and 8 deletions
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3
include/linux/sunrpc/gss_krb5.h
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@ -64,6 +64,9 @@ struct gss_krb5_enctype {
const u16 signalg; /* signing algorithm */
const u16 sealalg; /* sealing algorithm */
const u32 blocksize; /* encryption blocksize */
const u32 conflen; /* confounder length
(normally the same as
the blocksize) */
const u32 cksumlength; /* checksum length */
const u32 keyed_cksum; /* is it a keyed cksum? */
const u32 keybytes; /* raw key len, in bytes */