1#pragma ident	"%Z%%M%	%I%	%E% SMI"
2/*
3 * lib/krb5/krb/encrypt_tk.c
4 *
5 * Copyright 1990 by the Massachusetts Institute of Technology.
6 * All Rights Reserved.
7 *
8 * Export of this software from the United States of America may
9 *   require a specific license from the United States Government.
10 *   It is the responsibility of any person or organization contemplating
11 *   export to obtain such a license before exporting.
12 *
13 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
14 * distribute this software and its documentation for any purpose and
15 * without fee is hereby granted, provided that the above copyright
16 * notice appear in all copies and that both that copyright notice and
17 * this permission notice appear in supporting documentation, and that
18 * the name of M.I.T. not be used in advertising or publicity pertaining
19 * to distribution of the software without specific, written prior
20 * permission.  Furthermore if you modify this software you must label
21 * your software as modified software and not distribute it in such a
22 * fashion that it might be confused with the original M.I.T. software.
23 * M.I.T. makes no representations about the suitability of
24 * this software for any purpose.  It is provided "as is" without express
25 * or implied warranty.
26 *
27 *
28 * krb5_encrypt_tkt_part() routine.
29 */
30
31#include "k5-int.h"
32
33/*
34 Takes unencrypted dec_ticket & dec_tkt_part, encrypts with
35 dec_ticket->enc_part.etype
36 using *srv_key, and places result in dec_ticket->enc_part.
37 The string dec_ticket->enc_part.ciphertext will be allocated before
38 formatting.
39
40 returns errors from encryption routines, system errors
41
42 enc_part->ciphertext.data allocated & filled in with encrypted stuff
43*/
44
45krb5_error_code
46krb5_encrypt_tkt_part(krb5_context context, const krb5_keyblock *srv_key, register krb5_ticket *dec_ticket)
47{
48    krb5_data *scratch;
49    krb5_error_code retval;
50    register krb5_enc_tkt_part *dec_tkt_part = dec_ticket->enc_part2;
51
52    /*  start by encoding the to-be-encrypted part. */
53    if ((retval = encode_krb5_enc_tkt_part(dec_tkt_part, &scratch))) {
54	return retval;
55    }
56
57#define cleanup_scratch() { (void) memset(scratch->data, 0, scratch->length); \
58krb5_free_data(context, scratch); }
59
60    /* call the encryption routine */
61    retval = krb5_encrypt_helper(context, srv_key,
62				 KRB5_KEYUSAGE_KDC_REP_TICKET, scratch,
63				 &dec_ticket->enc_part);
64
65    cleanup_scratch();
66
67    return(retval);
68}
69