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When svcgssd reads the supported encrytion types from the
kernel, they are prefixed with a 'enctypes='. That prefix
has to be ignored to correctly parse the rest of the types.
Signed-off-by: Steve Dickson <steved@redhat.com>
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For the window of kernels between 2.6.35 (when the support
for newer encryption was added) and 2.6.39 (when the ability
to read the supported enctypes from the kernel was added),
use a default of all enctypes when the kernel supported
enctypes file cannot be read.
For kernels before 2.6.35, continue to use a default of
only DES enctypes.
Note that the version of Kerberos must also support the use of
gss_set_allowable_enctypes for service-side negotiations.
See also: http://bugzilla.redhat.com/show_bug.cgi?id=719776
Signed-off-by: Kevin Coffman <kwc@citi.umich.edu>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Recent versions of Kerberos libraries negotiate and use
an "acceptor subkey". This negotiation does not consider
that a service may have limited the encryption keys in its
keytab. A patch (http://src.mit.edu/fisheye/changelog/krb5/?cs=24603)
has been added to the MIT Kerberos code to allow an application
to indicate that it wants to limit the encryption types negotiated.
(This functionality has been available on the client/initiator
side for a while. The new patch adds this support to the
server/acceptor side.)
This patch adds support to read a recently added nfsd
proc file to determine the encryption types supported by
the kernel and calls the function to limit encryption
types negotiated for the acceptor subkey.
Signed-off-by: Kevin Coffman <kwc@citi.umich.edu>
Signed-off-by: Steve Dickson <steved@redhat.com>
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