print-krb.c revision 39297 
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[] =
26    "@(#) $Header: print-krb.c,v 1.9 97/04/26 14:01:45 leres Exp $";
27#endif
28
29#include <sys/param.h>
30#include <sys/time.h>
31#include <sys/socket.h>
32
33#include <netinet/in.h>
34#include <netinet/in_systm.h>
35#include <netinet/ip.h>
36#include <netinet/ip_var.h>
37#include <netinet/udp.h>
38#include <netinet/udp_var.h>
39
40#include <ctype.h>
41#include <errno.h>
42#include <stdio.h>
43
44#include "interface.h"
45#include "addrtoname.h"
46
47const u_char *c_print(register const u_char *, register const u_char *);
48const u_char *krb4_print_hdr(const u_char *);
49void krb4_print(const u_char *);
50void krb_print(const u_char *, u_int);
51
52
53#define AUTH_MSG_KDC_REQUEST			1<<1
54#define AUTH_MSG_KDC_REPLY			2<<1
55#define AUTH_MSG_APPL_REQUEST			3<<1
56#define AUTH_MSG_APPL_REQUEST_MUTUAL		4<<1
57#define AUTH_MSG_ERR_REPLY			5<<1
58#define AUTH_MSG_PRIVATE			6<<1
59#define AUTH_MSG_SAFE				7<<1
60#define AUTH_MSG_APPL_ERR			8<<1
61#define AUTH_MSG_DIE				63<<1
62
63#define KERB_ERR_OK				0
64#define KERB_ERR_NAME_EXP			1
65#define KERB_ERR_SERVICE_EXP			2
66#define KERB_ERR_AUTH_EXP			3
67#define KERB_ERR_PKT_VER			4
68#define KERB_ERR_NAME_MAST_KEY_VER		5
69#define KERB_ERR_SERV_MAST_KEY_VER		6
70#define KERB_ERR_BYTE_ORDER			7
71#define KERB_ERR_PRINCIPAL_UNKNOWN		8
72#define KERB_ERR_PRINCIPAL_NOT_UNIQUE		9
73#define KERB_ERR_NULL_KEY			10
74
75struct krb {
76	u_char pvno;		/* Protocol Version */
77	u_char type;		/* Type+B */
78};
79
80static char tstr[] = " [|kerberos]";
81
82static struct tok type2str[] = {
83	{ AUTH_MSG_KDC_REQUEST,		"KDC_REQUEST" },
84	{ AUTH_MSG_KDC_REPLY,		"KDC_REPLY" },
85	{ AUTH_MSG_APPL_REQUEST,	"APPL_REQUEST" },
86	{ AUTH_MSG_APPL_REQUEST_MUTUAL,	"APPL_REQUEST_MUTUAL" },
87	{ AUTH_MSG_ERR_REPLY,		"ERR_REPLY" },
88	{ AUTH_MSG_PRIVATE,		"PRIVATE" },
89	{ AUTH_MSG_SAFE,		"SAFE" },
90	{ AUTH_MSG_APPL_ERR,		"APPL_ERR" },
91	{ AUTH_MSG_DIE,			"DIE" },
92	{ 0,				NULL }
93};
94
95static struct tok kerr2str[] = {
96	{ KERB_ERR_OK,			"OK" },
97	{ KERB_ERR_NAME_EXP,		"NAME_EXP" },
98	{ KERB_ERR_SERVICE_EXP,		"SERVICE_EXP" },
99	{ KERB_ERR_AUTH_EXP,		"AUTH_EXP" },
100	{ KERB_ERR_PKT_VER,		"PKT_VER" },
101	{ KERB_ERR_NAME_MAST_KEY_VER,	"NAME_MAST_KEY_VER" },
102	{ KERB_ERR_SERV_MAST_KEY_VER,	"SERV_MAST_KEY_VER" },
103	{ KERB_ERR_BYTE_ORDER,		"BYTE_ORDER" },
104	{ KERB_ERR_PRINCIPAL_UNKNOWN,	"PRINCIPAL_UNKNOWN" },
105	{ KERB_ERR_PRINCIPAL_NOT_UNIQUE,"PRINCIPAL_NOT_UNIQUE" },
106	{ KERB_ERR_NULL_KEY,		"NULL_KEY"},
107	{ 0,				NULL}
108};
109
110
111/* little endian (unaligned) to host byte order */
112/* XXX need to look at this... */
113#define vtohlp(x)	    ((( ((char *)(x))[0] )      )  | \
114			     (( ((char *)(x))[1] ) <<  8)  | \
115			     (( ((char *)(x))[2] ) << 16)  | \
116			     (( ((char *)(x))[3] ) << 24))
117#define vtohsp(x)          ((( ((char *)(x))[0] )      )  | \
118			     (( ((char *)(x))[1] ) <<  8))
119/* network (big endian) (unaligned) to host byte order */
120#define ntohlp(x)	    ((( ((char *)(x))[3] )      )  | \
121			     (( ((char *)(x))[2] ) <<  8)  | \
122			     (( ((char *)(x))[1] ) << 16)  | \
123			     (( ((char *)(x))[0] ) << 24))
124#define ntohsp(x)          ((( ((char *)(x))[1] )      )  | \
125			     (( ((char *)(x))[0] ) <<  8))
126
127
128
129const u_char *
130c_print(register const u_char *s, register const u_char *ep)
131{
132	register u_char c;
133	register int flag;
134
135	flag = 1;
136	while (s < ep) {
137		c = *s++;
138		if (c == '\0') {
139			flag = 0;
140			break;
141		}
142		if (!isascii(c)) {
143			c = toascii(c);
144			putchar('M');
145			putchar('-');
146		}
147		if (!isprint(c)) {
148			c ^= 0x40;	/* DEL to ?, others to alpha */
149			putchar('^');
150		}
151		putchar(c);
152	}
153	if (flag)
154		return NULL;
155	return (s);
156}
157
158const u_char *
159krb4_print_hdr(const u_char *cp)
160{
161	cp += 2;
162
163#define PRINT		if ((cp = c_print(cp, snapend)) == NULL) goto trunc
164
165	PRINT;
166	putchar('.');
167	PRINT;
168	putchar('@');
169	PRINT;
170	return (cp);
171
172trunc:
173	fputs(tstr, stdout);
174	return (NULL);
175
176#undef PRINT
177}
178
179void
180krb4_print(const u_char *cp)
181{
182	register const struct krb *kp;
183	u_char type;
184	u_short len;
185
186#define PRINT		if ((cp = c_print(cp, snapend)) == NULL) goto trunc
187/*  True if struct krb is little endian */
188#define IS_LENDIAN(kp)	(((kp)->type & 0x01) != 0)
189#define KTOHSP(kp, cp)	(IS_LENDIAN(kp) ? vtohsp(cp) : ntohsp(cp))
190
191	kp = (struct krb *)cp;
192
193	if ((&kp->type) >= snapend) {
194		fputs(tstr, stdout);
195		return;
196	}
197
198	type = kp->type & (0xFF << 1);
199
200	printf(" %s %s: ",
201	    IS_LENDIAN(kp) ? "le" : "be", tok2str(type2str, NULL, type));
202
203	switch (type) {
204
205	case AUTH_MSG_KDC_REQUEST:
206		if ((cp = krb4_print_hdr(cp)) == NULL)
207			return;
208		cp += 4;	/* ctime */
209		TCHECK(*cp);
210		printf(" %dmin ", *cp++ * 5);
211		PRINT;
212		putchar('.');
213		PRINT;
214		break;
215
216	case AUTH_MSG_APPL_REQUEST:
217		cp += 2;
218		TCHECK(*cp);
219		printf("v%d ", *cp++);
220		PRINT;
221		TCHECK(*cp);
222		printf(" (%d)", *cp++);
223		TCHECK(*cp);
224		printf(" (%d)", *cp);
225		break;
226
227	case AUTH_MSG_KDC_REPLY:
228		if ((cp = krb4_print_hdr(cp)) == NULL)
229			return;
230		cp += 10;	/* timestamp + n + exp + kvno */
231		TCHECK2(*cp, sizeof(short));
232		len = KTOHSP(kp, cp);
233		printf(" (%d)", len);
234		break;
235
236	case AUTH_MSG_ERR_REPLY:
237		if ((cp = krb4_print_hdr(cp)) == NULL)
238			return;
239		cp += 4; 	  /* timestamp */
240		TCHECK2(*cp, sizeof(short));
241		printf(" %s ", tok2str(kerr2str, NULL, KTOHSP(kp, cp)));
242		cp += 4;
243		PRINT;
244		break;
245
246	default:
247		fputs("(unknown)", stdout);
248		break;
249	}
250
251	return;
252trunc:
253	fputs(tstr, stdout);
254}
255
256void
257krb_print(const u_char *dat, u_int length)
258{
259	register const struct krb *kp;
260
261	kp = (struct krb *)dat;
262
263	if (dat >= snapend) {
264		fputs(tstr, stdout);
265		return;
266	}
267
268	switch (kp->pvno) {
269
270	case 1:
271	case 2:
272	case 3:
273		printf(" v%d", kp->pvno);
274		break;
275
276	case 4:
277		printf(" v%d", kp->pvno);
278		krb4_print((const u_char *)kp);
279		break;
280
281	case 106:
282	case 107:
283		fputs(" v5", stdout);
284		/* Decode ASN.1 here "someday" */
285		break;
286	}
287	return;
288}
289