Move tcpdump-3.9/ to tcpdump/. No need for a versioned dir.
[dragonfly.git] / contrib / tcpdump / print-krb.c
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c8cf0f94
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1/*
2 * Copyright (c) 1995, 1996, 1997
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 *
21 * Initial contribution from John Hawkinson (jhawk@mit.edu).
22 */
23
24#ifndef lint
25static const char rcsid[] _U_ =
26 "@(#) $Header: /tcpdump/master/tcpdump/print-krb.c,v 1.23 2003/11/16 09:36:26 guy Exp $";
27#endif
28
29#ifdef HAVE_CONFIG_H
30#include "config.h"
31#endif
32
33#include <tcpdump-stdinc.h>
34
35#include <stdio.h>
36
37#include "interface.h"
38#include "addrtoname.h"
39#include "extract.h"
40
41static const u_char *c_print(register const u_char *, register const u_char *);
42static const u_char *krb4_print_hdr(const u_char *);
43static void krb4_print(const u_char *);
44
45#define AUTH_MSG_KDC_REQUEST 1<<1
46#define AUTH_MSG_KDC_REPLY 2<<1
47#define AUTH_MSG_APPL_REQUEST 3<<1
48#define AUTH_MSG_APPL_REQUEST_MUTUAL 4<<1
49#define AUTH_MSG_ERR_REPLY 5<<1
50#define AUTH_MSG_PRIVATE 6<<1
51#define AUTH_MSG_SAFE 7<<1
52#define AUTH_MSG_APPL_ERR 8<<1
53#define AUTH_MSG_DIE 63<<1
54
55#define KERB_ERR_OK 0
56#define KERB_ERR_NAME_EXP 1
57#define KERB_ERR_SERVICE_EXP 2
58#define KERB_ERR_AUTH_EXP 3
59#define KERB_ERR_PKT_VER 4
60#define KERB_ERR_NAME_MAST_KEY_VER 5
61#define KERB_ERR_SERV_MAST_KEY_VER 6
62#define KERB_ERR_BYTE_ORDER 7
63#define KERB_ERR_PRINCIPAL_UNKNOWN 8
64#define KERB_ERR_PRINCIPAL_NOT_UNIQUE 9
65#define KERB_ERR_NULL_KEY 10
66
67struct krb {
68 u_int8_t pvno; /* Protocol Version */
69 u_int8_t type; /* Type+B */
70};
71
72static char tstr[] = " [|kerberos]";
73
74static struct tok type2str[] = {
75 { AUTH_MSG_KDC_REQUEST, "KDC_REQUEST" },
76 { AUTH_MSG_KDC_REPLY, "KDC_REPLY" },
77 { AUTH_MSG_APPL_REQUEST, "APPL_REQUEST" },
78 { AUTH_MSG_APPL_REQUEST_MUTUAL, "APPL_REQUEST_MUTUAL" },
79 { AUTH_MSG_ERR_REPLY, "ERR_REPLY" },
80 { AUTH_MSG_PRIVATE, "PRIVATE" },
81 { AUTH_MSG_SAFE, "SAFE" },
82 { AUTH_MSG_APPL_ERR, "APPL_ERR" },
83 { AUTH_MSG_DIE, "DIE" },
84 { 0, NULL }
85};
86
87static struct tok kerr2str[] = {
88 { KERB_ERR_OK, "OK" },
89 { KERB_ERR_NAME_EXP, "NAME_EXP" },
90 { KERB_ERR_SERVICE_EXP, "SERVICE_EXP" },
91 { KERB_ERR_AUTH_EXP, "AUTH_EXP" },
92 { KERB_ERR_PKT_VER, "PKT_VER" },
93 { KERB_ERR_NAME_MAST_KEY_VER, "NAME_MAST_KEY_VER" },
94 { KERB_ERR_SERV_MAST_KEY_VER, "SERV_MAST_KEY_VER" },
95 { KERB_ERR_BYTE_ORDER, "BYTE_ORDER" },
96 { KERB_ERR_PRINCIPAL_UNKNOWN, "PRINCIPAL_UNKNOWN" },
97 { KERB_ERR_PRINCIPAL_NOT_UNIQUE,"PRINCIPAL_NOT_UNIQUE" },
98 { KERB_ERR_NULL_KEY, "NULL_KEY"},
99 { 0, NULL}
100};
101
102static const u_char *
103c_print(register const u_char *s, register const u_char *ep)
104{
105 register u_char c;
106 register int flag;
107
108 flag = 1;
109 while (s < ep) {
110 c = *s++;
111 if (c == '\0') {
112 flag = 0;
113 break;
114 }
115 if (!isascii(c)) {
116 c = toascii(c);
117 putchar('M');
118 putchar('-');
119 }
120 if (!isprint(c)) {
121 c ^= 0x40; /* DEL to ?, others to alpha */
122 putchar('^');
123 }
124 putchar(c);
125 }
126 if (flag)
127 return NULL;
128 return (s);
129}
130
131static const u_char *
132krb4_print_hdr(const u_char *cp)
133{
134 cp += 2;
135
136#define PRINT if ((cp = c_print(cp, snapend)) == NULL) goto trunc
137
138 PRINT;
139 putchar('.');
140 PRINT;
141 putchar('@');
142 PRINT;
143 return (cp);
144
145trunc:
146 fputs(tstr, stdout);
147 return (NULL);
148
149#undef PRINT
150}
151
152static void
153krb4_print(const u_char *cp)
154{
155 register const struct krb *kp;
156 u_char type;
157 u_short len;
158
159#define PRINT if ((cp = c_print(cp, snapend)) == NULL) goto trunc
160/* True if struct krb is little endian */
161#define IS_LENDIAN(kp) (((kp)->type & 0x01) != 0)
162#define KTOHSP(kp, cp) (IS_LENDIAN(kp) ? EXTRACT_LE_16BITS(cp) : EXTRACT_16BITS(cp))
163
164 kp = (struct krb *)cp;
165
166 if ((&kp->type) >= snapend) {
167 fputs(tstr, stdout);
168 return;
169 }
170
171 type = kp->type & (0xFF << 1);
172
173 printf(" %s %s: ",
174 IS_LENDIAN(kp) ? "le" : "be", tok2str(type2str, NULL, type));
175
176 switch (type) {
177
178 case AUTH_MSG_KDC_REQUEST:
179 if ((cp = krb4_print_hdr(cp)) == NULL)
180 return;
181 cp += 4; /* ctime */
182 TCHECK(*cp);
183 printf(" %dmin ", *cp++ * 5);
184 PRINT;
185 putchar('.');
186 PRINT;
187 break;
188
189 case AUTH_MSG_APPL_REQUEST:
190 cp += 2;
191 TCHECK(*cp);
192 printf("v%d ", *cp++);
193 PRINT;
194 TCHECK(*cp);
195 printf(" (%d)", *cp++);
196 TCHECK(*cp);
197 printf(" (%d)", *cp);
198 break;
199
200 case AUTH_MSG_KDC_REPLY:
201 if ((cp = krb4_print_hdr(cp)) == NULL)
202 return;
203 cp += 10; /* timestamp + n + exp + kvno */
204 TCHECK2(*cp, sizeof(short));
205 len = KTOHSP(kp, cp);
206 printf(" (%d)", len);
207 break;
208
209 case AUTH_MSG_ERR_REPLY:
210 if ((cp = krb4_print_hdr(cp)) == NULL)
211 return;
212 cp += 4; /* timestamp */
213 TCHECK2(*cp, sizeof(short));
214 printf(" %s ", tok2str(kerr2str, NULL, KTOHSP(kp, cp)));
215 cp += 4;
216 PRINT;
217 break;
218
219 default:
220 fputs("(unknown)", stdout);
221 break;
222 }
223
224 return;
225trunc:
226 fputs(tstr, stdout);
227}
228
229void
230krb_print(const u_char *dat)
231{
232 register const struct krb *kp;
233
234 kp = (struct krb *)dat;
235
236 if (dat >= snapend) {
237 fputs(tstr, stdout);
238 return;
239 }
240
241 switch (kp->pvno) {
242
243 case 1:
244 case 2:
245 case 3:
246 printf(" v%d", kp->pvno);
247 break;
248
249 case 4:
250 printf(" v%d", kp->pvno);
251 krb4_print((const u_char *)kp);
252 break;
253
254 case 106:
255 case 107:
256 fputs(" v5", stdout);
257 /* Decode ASN.1 here "someday" */
258 break;
259 }
260 return;
261}