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