17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate * lib/krb5/krb/decode_kdc.c
37c478bd9Sstevel@tonic-gate *
47c478bd9Sstevel@tonic-gate * Copyright 1990 by the Massachusetts Institute of Technology.
57c478bd9Sstevel@tonic-gate * All Rights Reserved.
67c478bd9Sstevel@tonic-gate *
77c478bd9Sstevel@tonic-gate * Export of this software from the United States of America may
87c478bd9Sstevel@tonic-gate * require a specific license from the United States Government.
97c478bd9Sstevel@tonic-gate * It is the responsibility of any person or organization contemplating
107c478bd9Sstevel@tonic-gate * export to obtain such a license before exporting.
117c478bd9Sstevel@tonic-gate *
127c478bd9Sstevel@tonic-gate * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
137c478bd9Sstevel@tonic-gate * distribute this software and its documentation for any purpose and
147c478bd9Sstevel@tonic-gate * without fee is hereby granted, provided that the above copyright
157c478bd9Sstevel@tonic-gate * notice appear in all copies and that both that copyright notice and
167c478bd9Sstevel@tonic-gate * this permission notice appear in supporting documentation, and that
177c478bd9Sstevel@tonic-gate * the name of M.I.T. not be used in advertising or publicity pertaining
187c478bd9Sstevel@tonic-gate * to distribution of the software without specific, written prior
197c478bd9Sstevel@tonic-gate * permission. Furthermore if you modify this software you must label
207c478bd9Sstevel@tonic-gate * your software as modified software and not distribute it in such a
217c478bd9Sstevel@tonic-gate * fashion that it might be confused with the original M.I.T. software.
227c478bd9Sstevel@tonic-gate * M.I.T. makes no representations about the suitability of
237c478bd9Sstevel@tonic-gate * this software for any purpose. It is provided "as is" without express
247c478bd9Sstevel@tonic-gate * or implied warranty.
257c478bd9Sstevel@tonic-gate *
267c478bd9Sstevel@tonic-gate *
277c478bd9Sstevel@tonic-gate * krb5_decode_kdc_rep() function.
287c478bd9Sstevel@tonic-gate */
297c478bd9Sstevel@tonic-gate
30*159d09a2SMark Phalan #include "k5-int.h"
317c478bd9Sstevel@tonic-gate
327c478bd9Sstevel@tonic-gate /*
337c478bd9Sstevel@tonic-gate Takes a KDC_REP message and decrypts encrypted part using etype and
347c478bd9Sstevel@tonic-gate *key, putting result in *rep.
357c478bd9Sstevel@tonic-gate dec_rep->client,ticket,session,last_req,server,caddrs
367c478bd9Sstevel@tonic-gate are all set to allocated storage which should be freed by the caller
377c478bd9Sstevel@tonic-gate when finished with the response.
387c478bd9Sstevel@tonic-gate
397c478bd9Sstevel@tonic-gate If the response isn't a KDC_REP (tgs or as), it returns an error from
407c478bd9Sstevel@tonic-gate the decoding routines.
417c478bd9Sstevel@tonic-gate
427c478bd9Sstevel@tonic-gate returns errors from encryption routines, system errors
437c478bd9Sstevel@tonic-gate */
447c478bd9Sstevel@tonic-gate
457c478bd9Sstevel@tonic-gate krb5_error_code
krb5_decode_kdc_rep(krb5_context context,krb5_data * enc_rep,const krb5_keyblock * key,krb5_kdc_rep ** dec_rep)46505d05c7Sgtb krb5_decode_kdc_rep(krb5_context context, krb5_data *enc_rep, const krb5_keyblock *key, krb5_kdc_rep **dec_rep)
477c478bd9Sstevel@tonic-gate {
487c478bd9Sstevel@tonic-gate krb5_error_code retval;
497c478bd9Sstevel@tonic-gate krb5_kdc_rep *local_dec_rep;
507c478bd9Sstevel@tonic-gate krb5_keyusage usage;
517c478bd9Sstevel@tonic-gate
527c478bd9Sstevel@tonic-gate if (krb5_is_as_rep(enc_rep)) {
537c478bd9Sstevel@tonic-gate usage = KRB5_KEYUSAGE_AS_REP_ENCPART;
547c478bd9Sstevel@tonic-gate retval = decode_krb5_as_rep(enc_rep, &local_dec_rep);
557c478bd9Sstevel@tonic-gate } else if (krb5_is_tgs_rep(enc_rep)) {
567c478bd9Sstevel@tonic-gate usage = KRB5_KEYUSAGE_TGS_REP_ENCPART_SESSKEY;
577c478bd9Sstevel@tonic-gate /* KRB5_KEYUSAGE_TGS_REP_ENCPART_SUBKEY would go here, except
587c478bd9Sstevel@tonic-gate that this client code base doesn't ever put a subkey in the
597c478bd9Sstevel@tonic-gate tgs_req authenticator, so the tgs_rep is never encrypted in
607c478bd9Sstevel@tonic-gate one. (Check send_tgs.c:krb5_send_tgs_basic(), near the top
617c478bd9Sstevel@tonic-gate where authent.subkey is set to 0) */
627c478bd9Sstevel@tonic-gate retval = decode_krb5_tgs_rep(enc_rep, &local_dec_rep);
637c478bd9Sstevel@tonic-gate } else {
647c478bd9Sstevel@tonic-gate return KRB5KRB_AP_ERR_MSG_TYPE;
657c478bd9Sstevel@tonic-gate }
667c478bd9Sstevel@tonic-gate
677c478bd9Sstevel@tonic-gate if (retval)
687c478bd9Sstevel@tonic-gate return retval;
697c478bd9Sstevel@tonic-gate
70505d05c7Sgtb if ((retval = krb5_kdc_rep_decrypt_proc(context, key, &usage,
71505d05c7Sgtb local_dec_rep)))
727c478bd9Sstevel@tonic-gate krb5_free_kdc_rep(context, local_dec_rep);
737c478bd9Sstevel@tonic-gate else
747c478bd9Sstevel@tonic-gate *dec_rep = local_dec_rep;
757c478bd9Sstevel@tonic-gate return(retval);
767c478bd9Sstevel@tonic-gate }
777c478bd9Sstevel@tonic-gate
78