Modify the preath plugin interface so that a plugin's context is
global to all the modules within a plugin.  Also, change the
client-side interface so that the preauth plugin context (once
created) lives the lifetime of a krb5_context.  This will allow
future changes that can set plugin parameters.  The client side
request context lives the lifetime of a call to krb5_get_init_creds().

Make the sample preauth plugins buildable outside the source tree.

Fix minor memory leak in sort_krb5_padata_sequence().

Add a prototype for krb5_do_preauth_tryagain() and change the plugin
interface.

Incorporates fixes from Nalin Dahyabhai <nalin@redhat.com> for leaks
of the function table pointers (rt #4566) and fix KDC crash (rt #4567)


Commit By: coffman



Revision: 18754
Changed Files:
U   trunk/src/include/k5-int.h
U   trunk/src/include/krb5/preauth_plugin.h
U   trunk/src/kdc/kdc_preauth.c
U   trunk/src/lib/krb5/krb/get_in_tkt.c
U   trunk/src/lib/krb5/krb/init_ctx.c
U   trunk/src/lib/krb5/krb/preauth2.c
U   trunk/src/lib/krb5/os/init_os_ctx.c
U   trunk/src/plugins/preauth/cksum_body/Makefile.in
A   trunk/src/plugins/preauth/cksum_body/cksum_body_main.c
D   trunk/src/plugins/preauth/cksum_body/src/cksum_body.c
U   trunk/src/plugins/preauth/wpse/Makefile.in
D   trunk/src/plugins/preauth/wpse/src/wpse.c
A   trunk/src/plugins/preauth/wpse/wpse_main.c