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
74
75
76
77
78
|
/*
* lib/krb4/rd_err.c
*
* Copyright 1986, 1987, 1988, 2000 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.
*
* Steve Miller Project Athena MIT/DEC
*/
#include <string.h>
#include "krb.h"
#include "prot.h"
/*
* Given an AUTH_MSG_APPL_ERR message, "in" and its length "in_length",
* return the error code from the message in "code" and the text in
* "m_data" as follows:
*
* m_data->app_data points to the error text
* m_data->app_length points to the length of the error text
*
* If all goes well, return RD_AP_OK. If the version number
* is wrong, return RD_AP_VERSION, and if it's not an AUTH_MSG_APPL_ERR
* type message, return RD_AP_MSG_TYPE.
*
* The AUTH_MSG_APPL_ERR message format can be found in mk_err.c
*/
int KRB5_CALLCONV
krb_rd_err(in, in_length, code, m_data)
u_char *in; /* pointer to the msg received */
u_long in_length; /* of in msg */
long *code; /* received error code */
MSG_DAT *m_data;
{
register u_char *p;
int le;
unsigned KRB4_32 raw_code;
p = in; /* beginning of message */
if (in_length < 1 + 1 + 4)
return RD_AP_MODIFIED; /* XXX should have better error code */
if (*p++ != KRB_PROT_VERSION)
return RD_AP_VERSION;
if (((*p) & ~1) != AUTH_MSG_APPL_ERR)
return RD_AP_MSG_TYPE;
le = *p++ & 1;
KRB4_GET32(raw_code, p, le);
*code = raw_code; /* XXX unsigned->signed conversion! */
m_data->app_data = p; /* we're now at the error text
* message */
m_data->app_length = p - in;
return RD_AP_OK; /* OK == 0 */
}
|
