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/*
* lib/krb5/krb/decode_kdc.c
*
* Copyright 1990 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
*
* krb5_decode_kdc_rep() function.
*/
#include "k5-int.h"
/*
Takes a KDC_REP message and decrypts encrypted part using etype and
*key, putting result in *rep.
dec_rep->client,ticket,session,last_req,server,caddrs
are all set to allocated storage which should be freed by the caller
when finished with the response.
If the response isn't a KDC_REP (tgs or as), it returns an error from
the decoding routines.
returns errors from encryption routines, system errors
*/
krb5_error_code
krb5_decode_kdc_rep(krb5_context context, krb5_data *enc_rep, const krb5_keyblock *key, krb5_kdc_rep **dec_rep)
{
krb5_error_code retval;
krb5_kdc_rep *local_dec_rep;
krb5_keyusage usage;
if (krb5_is_as_rep(enc_rep)) {
usage = KRB5_KEYUSAGE_AS_REP_ENCPART;
retval = decode_krb5_as_rep(enc_rep, &local_dec_rep);
} else if (krb5_is_tgs_rep(enc_rep)) {
usage = KRB5_KEYUSAGE_TGS_REP_ENCPART_SESSKEY;
/* KRB5_KEYUSAGE_TGS_REP_ENCPART_SUBKEY would go here, except
that this client code base doesn't ever put a subkey in the
tgs_req authenticator, so the tgs_rep is never encrypted in
one. (Check send_tgs.c:krb5_send_tgs_basic(), near the top
where authent.subkey is set to 0) */
retval = decode_krb5_tgs_rep(enc_rep, &local_dec_rep);
} else {
return KRB5KRB_AP_ERR_MSG_TYPE;
}
if (retval)
return retval;
if ((retval = krb5_kdc_rep_decrypt_proc(context, key, &usage,
local_dec_rep)))
krb5_free_kdc_rep(context, local_dec_rep);
else
*dec_rep = local_dec_rep;
return(retval);
}
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