print-isakmp.c

Windump3.6.2源代码

/*
 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the project nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */

#ifndef lint
static const char rcsid[] =
    "@(#) $Header: /tcpdump/master/tcpdump/print-isakmp.c,v 1.26 2000/12/12 09:20:26 itojun Exp $ (LBL)";
#endif

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <string.h>
#ifndef WIN32
#include <ctype.h>
#include <sys/param.h>
#include <sys/time.h>
#include <sys/socket.h>
#else
#include <winsock2.h>
#include "bittypes.h"
#include "IP6_misc.h"
typedef char *	caddr_t;
#endif /* WIN32 */

struct mbuf;
struct rtentry;

#ifndef WIN32
#include <netinet/in.h>
#endif /* WIN32 */

#include <stdio.h>
#include <netdb.h>

#include "isakmp.h"
#include "ipsec_doi.h"
#include "oakley.h"
#include "interface.h"
#include "addrtoname.h"
#include "extract.h"                    /* must come after interface.h */

#include "ip.h"
#ifdef INET6
#ifndef WIN32
#include "ip6.h"
#endif /* WIN32 */
#endif

#ifndef HAVE_SOCKADDR_STORAGE
#define sockaddr_storage sockaddr
#endif

static u_char *isakmp_sa_print(struct isakmp_gen *, u_char *, u_int32_t,
	u_int32_t, u_int32_t);
static u_char *isakmp_p_print(struct isakmp_gen *, u_char *, u_int32_t,
	u_int32_t, u_int32_t);
static u_char *isakmp_t_print(struct isakmp_gen *, u_char *, u_int32_t,
	u_int32_t, u_int32_t);
static u_char *isakmp_ke_print(struct isakmp_gen *, u_char *, u_int32_t,
	u_int32_t, u_int32_t);
static u_char *isakmp_id_print(struct isakmp_gen *, u_char *, u_int32_t,
	u_int32_t, u_int32_t);
static u_char *isakmp_cert_print(struct isakmp_gen *, u_char *, u_int32_t,
	u_int32_t, u_int32_t);
static u_char *isakmp_cr_print(struct isakmp_gen *, u_char *, u_int32_t,
	u_int32_t, u_int32_t);
static u_char *isakmp_sig_print(struct isakmp_gen *, u_char *, u_int32_t,
	u_int32_t, u_int32_t);
static u_char *isakmp_hash_print(struct isakmp_gen *, u_char *,
	u_int32_t, u_int32_t, u_int32_t);
static u_char *isakmp_nonce_print(struct isakmp_gen *, u_char *,
	u_int32_t, u_int32_t, u_int32_t);
static u_char *isakmp_n_print(struct isakmp_gen *, u_char *, u_int32_t,
	u_int32_t, u_int32_t);
static u_char *isakmp_d_print(struct isakmp_gen *, u_char *, u_int32_t,
	u_int32_t, u_int32_t);
static u_char *isakmp_vid_print(struct isakmp_gen *, u_char *, u_int32_t,
	u_int32_t, u_int32_t);
static u_char *isakmp_sub0_print(u_char, struct isakmp_gen *, u_char *,
	u_int32_t, u_int32_t, u_int32_t);
static u_char *isakmp_sub_print(u_char, struct isakmp_gen *, u_char *,
	u_int32_t, u_int32_t, u_int32_t);
static char *numstr(int);
static void safememcpy(void *, void *, size_t);

#define MAXINITIATORS	20
int ninitiator = 0;
struct {
	cookie_t initiator;
	struct sockaddr_storage iaddr;
	struct sockaddr_storage raddr;
} cookiecache[MAXINITIATORS];

/* protocol id */
static char *protoidstr[] = {
	NULL, "isakmp", "ipsec-ah", "ipsec-esp", "ipcomp",
};

/* isakmp->np */
static char *npstr[] = {
	"none", "sa", "p", "t", "ke", "id", "cert", "cr", "hash",
	"sig", "nonce", "n", "d", "vid"
};

/* isakmp->np */
static u_char *(*npfunc[])(struct isakmp_gen *, u_char *, u_int32_t,
		u_int32_t, u_int32_t) = {
	NULL,
	isakmp_sa_print,
	isakmp_p_print,
	isakmp_t_print,
	isakmp_ke_print,
	isakmp_id_print,
	isakmp_cert_print,
	isakmp_cr_print,
	isakmp_hash_print,
	isakmp_sig_print,
	isakmp_nonce_print,
	isakmp_n_print,
	isakmp_d_print,
	isakmp_vid_print,
};

/* isakmp->etype */
static char *etypestr[] = {
	"none", "base", "ident", "auth", "agg", "inf", NULL, NULL,
	NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
	NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
	NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
	"oakley-quick", "oakley-newgroup",
};

#define STR_OR_ID(x, tab) \
	(((x) < sizeof(tab)/sizeof(tab[0]) && tab[(x)])	? tab[(x)] : numstr(x))
#define PROTOIDSTR(x)	STR_OR_ID(x, protoidstr)
#define NPSTR(x)	STR_OR_ID(x, npstr)
#define ETYPESTR(x)	STR_OR_ID(x, etypestr)

#define NPFUNC(x) \
	(((x) < sizeof(npfunc)/sizeof(npfunc[0]) && npfunc[(x)]) \
		? npfunc[(x)] : NULL)

static int
iszero(u_char *p, size_t l)
{
	while (l--) {
		if (*p++)
			return 0;
	}
	return 1;
}

/* find cookie from initiator cache */
static int
cookie_find(cookie_t *in)
{
	int i;

	for (i = 0; i < MAXINITIATORS; i++) {
		if (memcmp(in, &cookiecache[i].initiator, sizeof(*in)) == 0)
			return i;
	}

	return -1;
}

/* record initiator */
static void
cookie_record(cookie_t *in, const u_char *bp2)
{
	int i;
	struct ip *ip;
	struct sockaddr_in *sin;
#ifdef INET6
	struct ip6_hdr *ip6;
	struct sockaddr_in6 *sin6;
#endif

	i = cookie_find(in);
	if (0 <= i) {
		ninitiator = (i + 1) % MAXINITIATORS;
		return;
	}

	ip = (struct ip *)bp2;
	switch (IP_V(ip)) {
	case 4:
		memset(&cookiecache[ninitiator].iaddr, 0,
			sizeof(cookiecache[ninitiator].iaddr));
		memset(&cookiecache[ninitiator].raddr, 0,
			sizeof(cookiecache[ninitiator].raddr));

		sin = (struct sockaddr_in *)&cookiecache[ninitiator].iaddr;
#ifdef HAVE_SOCKADDR_SA_LEN
		sin->sin_len = sizeof(struct sockaddr_in);
#endif
		sin->sin_family = AF_INET;
		memcpy(&sin->sin_addr, &ip->ip_src, sizeof(ip->ip_src));
		sin = (struct sockaddr_in *)&cookiecache[ninitiator].raddr;
#ifdef HAVE_SOCKADDR_SA_LEN
		sin->sin_len = sizeof(struct sockaddr_in);
#endif
		sin->sin_family = AF_INET;
		memcpy(&sin->sin_addr, &ip->ip_dst, sizeof(ip->ip_dst));
		break;
#ifdef INET6
	case 6:
		memset(&cookiecache[ninitiator].iaddr, 0,
			sizeof(cookiecache[ninitiator].iaddr));
		memset(&cookiecache[ninitiator].raddr, 0,
			sizeof(cookiecache[ninitiator].raddr));

		ip6 = (struct ip6_hdr *)bp2;
		sin6 = (struct sockaddr_in6 *)&cookiecache[ninitiator].iaddr;
#ifdef HAVE_SOCKADDR_SA_LEN
		sin6->sin6_len = sizeof(struct sockaddr_in6);
#endif
		sin6->sin6_family = AF_INET6;
		memcpy(&sin6->sin6_addr, &ip6->ip6_src, sizeof(ip6->ip6_src));
		sin6 = (struct sockaddr_in6 *)&cookiecache[ninitiator].raddr;
#ifdef HAVE_SOCKADDR_SA_LEN
		sin6->sin6_len = sizeof(struct sockaddr_in6);
#endif
		sin6->sin6_family = AF_INET6;
		memcpy(&sin6->sin6_addr, &ip6->ip6_dst, sizeof(ip6->ip6_dst));
		break;
#endif
	default:
		return;
	}
	memcpy(&cookiecache[ninitiator].initiator, in, sizeof(*in));
	ninitiator = (ninitiator + 1) % MAXINITIATORS;
}

#define cookie_isinitiator(x, y)	cookie_sidecheck((x), (y), 1)
#define cookie_isresponder(x, y)	cookie_sidecheck((x), (y), 0)
static int
cookie_sidecheck(int i, const u_char *bp2, int initiator)
{
	struct sockaddr_storage ss;
	struct sockaddr *sa;
	struct ip *ip;
	struct sockaddr_in *sin;
#ifdef INET6
	struct ip6_hdr *ip6;
	struct sockaddr_in6 *sin6;
#endif
	int salen;

	memset(&ss, 0, sizeof(ss));
	ip = (struct ip *)bp2;
	switch (IP_V(ip)) {
	case 4:
		sin = (struct sockaddr_in *)&ss;
#ifdef HAVE_SOCKADDR_SA_LEN
		sin->sin_len = sizeof(struct sockaddr_in);
#endif
		sin->sin_family = AF_INET;
		memcpy(&sin->sin_addr, &ip->ip_src, sizeof(ip->ip_src));
		break;
#ifdef INET6
	case 6:
		ip6 = (struct ip6_hdr *)bp2;
		sin6 = (struct sockaddr_in6 *)&ss;
#ifdef HAVE_SOCKADDR_SA_LEN
		sin6->sin6_len = sizeof(struct sockaddr_in6);
#endif
		sin6->sin6_family = AF_INET6;
		memcpy(&sin6->sin6_addr, &ip6->ip6_src, sizeof(ip6->ip6_src));
		break;
#endif
	default:
		return 0;
	}

	sa = (struct sockaddr *)&ss;
	if (initiator) {
		if (sa->sa_family != ((struct sockaddr *)&cookiecache[i].iaddr)->sa_family)
			return 0;
#ifdef HAVE_SOCKADDR_SA_LEN
		salen = sa->sa_len;
#else
#ifdef INET6
		if (sa->sa_family == AF_INET6)
			salen = sizeof(struct sockaddr_in6);
		else
			salen = sizeof(struct sockaddr);
#else
		salen = sizeof(struct sockaddr);
#endif
#endif
		if (memcmp(&ss, &cookiecache[i].iaddr, salen) == 0)
			return 1;
	} else {
		if (sa->sa_family != ((struct sockaddr *)&cookiecache[i].raddr)->sa_family)
			return 0;
#ifdef HAVE_SOCKADDR_SA_LEN
		salen = sa->sa_len;
#else
#ifdef INET6
		if (sa->sa_family == AF_INET6)
			salen = sizeof(struct sockaddr_in6);
		else
			salen = sizeof(struct sockaddr);
#else
		salen = sizeof(struct sockaddr);
#endif
#endif
		if (memcmp(&ss, &cookiecache[i].raddr, salen) == 0)
			return 1;
	}
	return 0;
}

static void
rawprint(caddr_t loc, size_t len)
{
	static u_char *p;
	int i;

	p = (u_char *)loc;
	for (i = 0; i < len; i++)
		printf("%02x", p[i] & 0xff);
}

struct attrmap {
	char *type;
	int nvalue;
	char *value[30];	/*XXX*/
};

static u_char *
isakmp_attrmap_print(u_char *p, u_char *ep, struct attrmap *map, size_t nmap)
{
	u_int16_t *q;
	int totlen;
	u_int32_t t, v;

	q = (u_int16_t *)p;
	if (p[0] & 0x80)
		totlen = 4;
	else
		totlen = 4 + ntohs(q[1]);
	if (ep < p + totlen) {
		printf("[|attr]");
		return ep + 1;
	}

	printf("(");
	t = ntohs(q[0]) & 0x7fff;
	if (map && t < nmap && map[t].type)
		printf("type=%s ", map[t].type);
	else
		printf("type=#%d ", t);
	if (p[0] & 0x80) {
		printf("value=");
		v = ntohs(q[1]);
		if (map && t < nmap && v < map[t].nvalue && map[t].value[v])
			printf("%s", map[t].value[v]);
		else
			rawprint((caddr_t)&q[1], 2);
	} else {
		printf("len=%d value=", ntohs(q[1]));
		rawprint((caddr_t)&p[4], ntohs(q[1]));
	}
	printf(")");
	return p + totlen;
}

static u_char *
isakmp_attr_print(u_char *p, u_char *ep)
{
	u_int16_t *q;
	int totlen;
	u_int32_t t;

	q = (u_int16_t *)p;
	if (p[0] & 0x80)
		totlen = 4;
	else
		totlen = 4 + ntohs(q[1]);
	if (ep < p + totlen) {
		printf("[|attr]");
		return ep + 1;
	}

	printf("(");
	t = ntohs(q[0]) & 0x7fff;
	printf("type=#%d ", t);
	if (p[0] & 0x80) {
		printf("value=");
		t = q[1];
		rawprint((caddr_t)&q[1], 2);
	} else {
		printf("len=%d value=", ntohs(q[1]));
		rawprint((caddr_t)&p[2], ntohs(q[1]));
	}
	printf(")");
	return p + totlen;
}

static u_char *
isakmp_sa_print(struct isakmp_gen *ext, u_char *ep, u_int32_t phase,
	u_int32_t doi0, u_int32_t proto0)
{
	struct isakmp_pl_sa *p, sa;
	u_int32_t *q;
	u_int32_t doi, sit, ident;
	u_char *cp, *np;
	int t;

	printf("%s:", NPSTR(ISAKMP_NPTYPE_SA));

	p = (struct isakmp_pl_sa *)ext;
	safememcpy(&sa, ext, sizeof(sa));
	doi = ntohl(sa.doi);
	sit = ntohl(sa.sit);
	if (doi != 1) {
		printf(" doi=%d", doi);
		printf(" situation=%u", (u_int32_t)ntohl(sa.sit));
		return (u_char *)(p + 1);
	}

	printf(" doi=ipsec");
	q = (u_int32_t *)&sa.sit;
	printf(" situation=");
	t = 0;
	if (sit & 0x01) {
		printf("identity");
		t++;
	}
	if (sit & 0x02) {
		printf("%ssecrecy", t ? "+" : "");
		t++;
	}
	if (sit & 0x04)
		printf("%sintegrity", t ? "+" : "");

	np = (u_char *)ext + sizeof(sa);
	if (sit != 0x01) {
		safememcpy(&ident, ext + 1, sizeof(ident));
		printf(" ident=%u", (u_int32_t)ntohl(ident));
		np += sizeof(ident);
	}

	ext = (struct isakmp_gen *)np;

	cp = isakmp_sub_print(ISAKMP_NPTYPE_P, ext, ep, phase, doi, proto0);

	return cp;
}

static u_char *
isakmp_p_print(struct isakmp_gen *ext, u_char *ep, u_int32_t phase,
	u_int32_t doi0, u_int32_t proto0)
{
	struct isakmp_pl_p *p, prop;
	u_char *cp;

	printf("%s:", NPSTR(ISAKMP_NPTYPE_P));

	p = (struct isakmp_pl_p *)ext;
	safememcpy(&prop, ext, sizeof(prop));
	printf(" #%d protoid=%s transform=%d",
		prop.p_no, PROTOIDSTR(prop.prot_id), prop.num_t);
	if (prop.spi_size) {
		printf(" spi=");
		rawprint((caddr_t)(p + 1), prop.spi_size);
	}

	ext = (struct isakmp_gen *)((u_char *)(p + 1) + prop.spi_size);

	cp = isakmp_sub_print(ISAKMP_NPTYPE_T, ext, ep, phase, doi0,
		prop.prot_id);

	return cp;
}

static char *isakmp_p_map[] = {
	NULL, "ike",
};

static char *ah_p_map[] = {
	NULL, "(reserved)", "md5", "sha", "1des",
	"sha2-256", "sha2-384", "sha2-512",
};

static char *esp_p_map[] = {
	NULL, "1des-iv64", "1des", "3des", "rc5", "idea", "cast",
	"blowfish", "3idea", "1des-iv32", "rc4", "null", "aes"
};

static char *ipcomp_p_map[] = {
	NULL, "oui", "deflate", "lzs",
};

struct attrmap ipsec_t_map[] = {
	{ NULL,	0, },
	{ "lifetype", 3, { NULL, "sec", "kb", }, },
	{ "life", 0, },
	{ "group desc", 5,	{ NULL, "modp768", "modp1024", "EC2N 2^155",
				  "EC2N 2^185", }, },
	{ "enc mode", 3, { NULL, "tunnel", "transport", }, },
	{ "auth", 5, { NULL, "hmac-md5", "hmac-sha1", "1des-mac", "keyed", }, },
	{ "keylen", 0, },
	{ "rounds", 0, },
	{ "dictsize", 0, },
	{ "privalg", 0, },
};

struct attrmap oakley_t_map[] = {
	{ NULL,	0 },
	{ "enc", 8,	{ NULL, "1des", "idea", "blowfish", "rc5",
		 	  "3des", "cast", "aes", }, },
	{ "hash", 7,	{ NULL, "md5", "sha1", "tiger",
			  "sha2-256", "sha2-384", "sha2-512", }, },
	{ "auth", 6,	{ NULL, "preshared", "dss", "rsa sig", "rsa enc",
			  "rsa enc revised", }, },
	{ "group desc", 5,	{ NULL, "modp768", "modp1024", "EC2N 2^155",
				  "EC2N 2^185", }, },
	{ "group type", 4,	{ NULL, "MODP", "ECP", "EC2N", }, },
	{ "group prime", 0, },
	{ "group gen1", 0, },
	{ "group gen2", 0, },
	{ "group curve A", 0, },
	{ "group curve B", 0, },
	{ "lifetype", 3,	{ NULL, "sec", "kb", }, },
	{ "lifeduration", 0, },
	{ "prf", 0, },
	{ "keylen", 0, },
	{ "field", 0, },
	{ "order", 0, },
};

static u_char *
isakmp_t_print(struct isakmp_gen *ext, u_char *ep, u_int32_t phase,
	u_int32_t doi, u_int32_t proto)
{
	struct isakmp_pl_t *p, t;
	u_char *cp;
	char *idstr;
	struct attrmap *map;
	size_t nmap;
	u_char *ep2;

	printf("%s:", NPSTR(ISAKMP_NPTYPE_T));

	p = (struct isakmp_pl_t *)ext;
	safememcpy(&t, ext, sizeof(t));

	switch (proto) {
	case 1:
		idstr = STR_OR_ID(t.t_id, isakmp_p_map);
		map = oakley_t_map;
		nmap = sizeof(oakley_t_map)/sizeof(oakley_t_map[0]);
		break;
	case 2:
		idstr = STR_OR_ID(t.t_id, ah_p_map);
		map = ipsec_t_map;
		nmap = sizeof(ipsec_t_map)/sizeof(ipsec_t_map[0]);
		break;
	case 3:
		idstr = STR_OR_ID(t.t_id, esp_p_map);
		map = ipsec_t_map;
		nmap = sizeof(ipsec_t_map)/sizeof(ipsec_t_map[0]);
		break;
	case 4:
		idstr = STR_OR_ID(t.t_id, ipcomp_p_map);
		map = ipsec_t_map;
		nmap = sizeof(ipsec_t_map)/sizeof(ipsec_t_map[0]);
		break;
	default:
		idstr = NULL;
		map = NULL;
		nmap = 0;
		break;
	}

	if (idstr)
		printf(" #%d id=%s ", t.t_no, idstr);
	else
		printf(" #%d id=%d ", t.t_no, t.t_id);
	cp = (u_char *)(p + 1);
	ep2 = (u_char *)p + ntohs(t.h.len);
	while (cp < ep && cp < ep2) {