rpcgss: krb5: sanity check sealalg value in the downcall

The sealalg is checked in several places, giving the impression it could be
either SEAL_ALG_NONE or SEAL_ALG_DES.  But in fact SEAL_ALG_NONE seems to
be sufficient only for making mic's, and all the contexts we get must be
capable of wrapping as well.  So the sealalg must be SEAL_ALG_DES.  As
with signalg, just check for the right value on the downcall and ignore it
otherwise.  Similarly, tighten expectations for the sealalg on incoming
tokens, in case we do support other values eventually.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 0 insertions, 1 deletions

diff --git a/include/linux/sunrpc/gss_krb5.h b/include/linux/sunrpc/gss_krb5.h
index abfa1f32d914..01c5e4314632 100644
--- a/include/linux/sunrpc/gss_krb5.h
+++ b/include/linux/sunrpc/gss_krb5.h
@@ -44,7 +44,6 @@ struct krb5_ctx {
         int                     initiate; /* 1 = initiating, 0 = accepting */
         int                     seed_init;
         unsigned char           seed[16];
-        int                     sealalg;
         struct crypto_blkcipher *enc;
         struct crypto_blkcipher *seq;
         s32                     endtime;