1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
/*
* lib/krb5/krb/decrypt_tk.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. 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_decrypt_tkt_part() function.
*/
#include "k5-int.h"
/*
Decrypts dec_ticket->enc_part
using *srv_key, and places result in dec_ticket->enc_part2.
The storage of dec_ticket->enc_part2 will be allocated before return.
returns errors from encryption routines, system errors
*/
KRB5_DLLIMP krb5_error_code KRB5_CALLCONV
krb5_decrypt_tkt_part(context, srv_key, ticket)
krb5_context context;
const krb5_keyblock FAR *srv_key;
register krb5_ticket FAR *ticket;
{
krb5_enc_tkt_part *dec_tkt_part;
krb5_data scratch;
krb5_error_code retval;
if (!valid_enctype(ticket->enc_part.enctype))
return KRB5_PROG_ETYPE_NOSUPP;
scratch.length = ticket->enc_part.ciphertext.length;
if (!(scratch.data = malloc(ticket->enc_part.ciphertext.length)))
return(ENOMEM);
/* call the encryption routine */
if (retval = krb5_c_decrypt(context, srv_key,
KRB5_KEYUSAGE_KDC_REP_TICKET, 0,
&ticket->enc_part, &scratch)) {
free(scratch.data);
return retval;
}
#define clean_scratch() {memset(scratch.data, 0, scratch.length); \
free(scratch.data);}
/* now decode the decrypted stuff */
retval = decode_krb5_enc_tkt_part(&scratch, &dec_tkt_part);
if (!retval) {
ticket->enc_part2 = dec_tkt_part;
}
clean_scratch();
return retval;
}
|
