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NetBSD/dist/tcpdump/print-isakmp.c
drochner c6de8226b0 Back out local NetBSD change (range check to avoid buffer overflow), 
to reduce diffs to upstream.
This is superseded by another check (TCHECK2) introduced upstream.
2007-07-28 16:09:14 +00:00

1457 lines
35 KiB
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/* $NetBSD: print-isakmp.c,v 1.7 2007/07/28 16:09:14 drochner Exp $ */
/*
* 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.
*
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static const char rcsid[] _U_ =
"@(#) Header: /tcpdump/master/tcpdump/print-isakmp.c,v 1.51 2005/04/07 00:28:17 mcr Exp (LBL)";
#else
__RCSID("$NetBSD: print-isakmp.c,v 1.7 2007/07/28 16:09:14 drochner Exp $");
#endif
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <tcpdump-stdinc.h>
#include <string.h>
#include <stdio.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
#include "ip6.h"
#endif
#ifndef HAVE_SOCKADDR_STORAGE
#define sockaddr_storage sockaddr
#endif
static const u_char *isakmp_sa_print(const struct isakmp_gen *,
u_int, const u_char *, u_int32_t, u_int32_t, u_int32_t, int);
static const u_char *isakmp_p_print(const struct isakmp_gen *,
u_int, const u_char *, u_int32_t, u_int32_t, u_int32_t, int);
static const u_char *isakmp_t_print(const struct isakmp_gen *,
u_int, const u_char *, u_int32_t, u_int32_t, u_int32_t, int);
static const u_char *isakmp_ke_print(const struct isakmp_gen *,
u_int, const u_char *, u_int32_t, u_int32_t, u_int32_t, int);
static const u_char *isakmp_id_print(const struct isakmp_gen *,
u_int, const u_char *, u_int32_t, u_int32_t, u_int32_t, int);
static const u_char *isakmp_cert_print(const struct isakmp_gen *,
u_int, const u_char *, u_int32_t, u_int32_t, u_int32_t, int);
static const u_char *isakmp_cr_print(const struct isakmp_gen *,
u_int, const u_char *, u_int32_t, u_int32_t, u_int32_t, int);
static const u_char *isakmp_sig_print(const struct isakmp_gen *,
u_int, const u_char *, u_int32_t, u_int32_t, u_int32_t, int);
static const u_char *isakmp_hash_print(const struct isakmp_gen *,
u_int, const u_char *, u_int32_t, u_int32_t, u_int32_t, int);
static const u_char *isakmp_nonce_print(const struct isakmp_gen *,
u_int, const u_char *, u_int32_t, u_int32_t, u_int32_t, int);
static const u_char *isakmp_n_print(const struct isakmp_gen *,
u_int, const u_char *, u_int32_t, u_int32_t, u_int32_t, int);
static const u_char *isakmp_d_print(const struct isakmp_gen *,
u_int, const u_char *, u_int32_t, u_int32_t, u_int32_t, int);
static const u_char *isakmp_vid_print(const struct isakmp_gen *,
u_int, const u_char *, u_int32_t, u_int32_t, u_int32_t, int);
static const u_char *isakmp_sub0_print(u_char, const struct isakmp_gen *,
const u_char *, u_int32_t, u_int32_t, u_int32_t, int);
static const u_char *isakmp_sub_print(u_char, const struct isakmp_gen *,
const u_char *, u_int32_t, u_int32_t, u_int32_t, int);
static char *numstr(int);
static void safememcpy(void *, const 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 const char *protoidstr[] = {
NULL, "isakmp", "ipsec-ah", "ipsec-esp", "ipcomp",
};
/* isakmp->np */
static const char *npstr[] = {
"none", "sa", "p", "t", "ke", "id", "cert", "cr", "hash",
"sig", "nonce", "n", "d", "vid"
};
/* isakmp->np */
static const u_char *(*npfunc[])(const struct isakmp_gen *, u_int,
const u_char *, u_int32_t, u_int32_t, u_int32_t, int) = {
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 const 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 int
rawprint(caddr_t loc, size_t len)
{
static u_char *p;
size_t i;
TCHECK2(*loc, len);
p = (u_char *)loc;
for (i = 0; i < len; i++)
printf("%02x", p[i] & 0xff);
return 1;
trunc:
return 0;
}
struct attrmap {
const char *type;
u_int nvalue;
const char *value[30]; /*XXX*/
};
static const u_char *
isakmp_attrmap_print(const u_char *p, const u_char *ep,
const 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 + EXTRACT_16BITS(&q[1]);
if (ep < p + totlen) {
printf("[|attr]");
return ep + 1;
}
printf("(");
t = EXTRACT_16BITS(&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 = EXTRACT_16BITS(&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=", EXTRACT_16BITS(&q[1]));
rawprint((caddr_t)&p[4], EXTRACT_16BITS(&q[1]));
}
printf(")");
return p + totlen;
}
static const u_char *
isakmp_attr_print(const u_char *p, const 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 + EXTRACT_16BITS(&q[1]);
if (ep < p + totlen) {
printf("[|attr]");
return ep + 1;
}
printf("(");
t = EXTRACT_16BITS(&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=", EXTRACT_16BITS(&q[1]));
rawprint((caddr_t)&p[2], EXTRACT_16BITS(&q[1]));
}
printf(")");
return p + totlen;
}
static const u_char *
isakmp_sa_print(const struct isakmp_gen *ext,
u_int item_len _U_,
const u_char *ep, u_int32_t phase, u_int32_t doi0 _U_,
u_int32_t proto0, int depth)
{
const struct isakmp_pl_sa *p;
struct isakmp_pl_sa sa;
const u_int32_t *q;
u_int32_t doi, sit, ident;
const u_char *cp, *np;
int t;
printf("%s:", NPSTR(ISAKMP_NPTYPE_SA));
p = (struct isakmp_pl_sa *)ext;
TCHECK(*p);
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) {
TCHECK2(*(ext + 1), sizeof(ident));
safememcpy(&ident, ext + 1, sizeof(ident));
printf(" ident=%u", (u_int32_t)ntohl(ident));
np += sizeof(ident);
}
ext = (struct isakmp_gen *)np;
TCHECK(*ext);
cp = isakmp_sub_print(ISAKMP_NPTYPE_P, ext, ep, phase, doi, proto0,
depth);
return cp;
trunc:
printf(" [|%s]", NPSTR(ISAKMP_NPTYPE_SA));
return NULL;
}
static const u_char *
isakmp_p_print(const struct isakmp_gen *ext, u_int item_len _U_,
const u_char *ep, u_int32_t phase, u_int32_t doi0,
u_int32_t proto0 _U_, int depth)
{
const struct isakmp_pl_p *p;
struct isakmp_pl_p prop;
const u_char *cp;
printf("%s:", NPSTR(ISAKMP_NPTYPE_P));
p = (struct isakmp_pl_p *)ext;
TCHECK(*p);
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=");
if (!rawprint((caddr_t)(p + 1), prop.spi_size))
goto trunc;
}
ext = (struct isakmp_gen *)((u_char *)(p + 1) + prop.spi_size);
TCHECK(*ext);
cp = isakmp_sub_print(ISAKMP_NPTYPE_T, ext, ep, phase, doi0,
prop.prot_id, depth);
return cp;
trunc:
printf(" [|%s]", NPSTR(ISAKMP_NPTYPE_P));
return NULL;
}
static const char *isakmp_p_map[] = {
NULL, "ike",
};
static const char *ah_p_map[] = {
NULL, "(reserved)", "md5", "sha", "1des",
"sha2-256", "sha2-384", "sha2-512",
};
static const char *esp_p_map[] = {
NULL, "1des-iv64", "1des", "3des", "rc5", "idea", "cast",
"blowfish", "3idea", "1des-iv32", "rc4", "null", "aes"
};
static const char *ipcomp_p_map[] = {
NULL, "oui", "deflate", "lzs",
};
const struct attrmap ipsec_t_map[] = {
{ NULL, 0, { NULL } },
{ "lifetype", 3, { NULL, "sec", "kb", }, },
{ "life", 0, { NULL } },
{ "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, { NULL } },
{ "rounds", 0, { NULL } },
{ "dictsize", 0, { NULL } },
{ "privalg", 0, { NULL } },
};
const struct attrmap oakley_t_map[] = {
{ NULL, 0, { NULL } },
{ "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, { NULL } },
{ "group gen1", 0, { NULL } },
{ "group gen2", 0, { NULL } },
{ "group curve A", 0, { NULL } },
{ "group curve B", 0, { NULL } },
{ "lifetype", 3, { NULL, "sec", "kb", }, },
{ "lifeduration", 0, { NULL } },
{ "prf", 0, { NULL } },
{ "keylen", 0, { NULL } },
{ "field", 0, { NULL } },
{ "order", 0, { NULL } },
};
static const u_char *
isakmp_t_print(const struct isakmp_gen *ext, u_int item_len,
const u_char *ep, u_int32_t phase _U_, u_int32_t doi _U_,
u_int32_t proto, int depth _U_)
{
const struct isakmp_pl_t *p;
struct isakmp_pl_t t;
const u_char *cp;
const char *idstr;
const struct attrmap *map;
size_t nmap;
const u_char *ep2;
printf("%s:", NPSTR(ISAKMP_NPTYPE_T));
p = (struct isakmp_pl_t *)ext;
TCHECK(*p);
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 + item_len;
while (cp < ep && cp < ep2) {
if (map && nmap) {
cp = isakmp_attrmap_print(cp, (ep < ep2) ? ep : ep2,
map, nmap);
} else
cp = isakmp_attr_print(cp, (ep < ep2) ? ep : ep2);
}
if (ep < ep2)
printf("...");
return cp;
trunc:
printf(" [|%s]", NPSTR(ISAKMP_NPTYPE_T));
return NULL;
}
static const u_char *
isakmp_ke_print(const struct isakmp_gen *ext, u_int item_len _U_,
const u_char *ep _U_, u_int32_t phase _U_, u_int32_t doi _U_,
u_int32_t proto _U_, int depth _U_)
{
struct isakmp_gen e;
printf("%s:", NPSTR(ISAKMP_NPTYPE_KE));
TCHECK(*ext);
safememcpy(&e, ext, sizeof(e));
printf(" key len=%d", ntohs(e.len) - 4);
if (2 < vflag && 4 < ntohs(e.len)) {
printf(" ");
if (!rawprint((caddr_t)(ext + 1), ntohs(e.len) - 4))
goto trunc;
}
return (u_char *)ext + ntohs(e.len);
trunc:
printf(" [|%s]", NPSTR(ISAKMP_NPTYPE_KE));
return NULL;
}
static const u_char *
isakmp_id_print(const struct isakmp_gen *ext, u_int item_len _U_,
const u_char *ep _U_, u_int32_t phase, u_int32_t doi _U_,
u_int32_t proto _U_, int depth _U_)
{
#define USE_IPSECDOI_IN_PHASE1 1
const struct isakmp_pl_id *p;
struct isakmp_pl_id id;
static const char *idtypestr[] = {
"IPv4", "IPv4net", "IPv6", "IPv6net",
};
static const char *ipsecidtypestr[] = {
NULL, "IPv4", "FQDN", "user FQDN", "IPv4net", "IPv6",
"IPv6net", "IPv4range", "IPv6range", "ASN1 DN", "ASN1 GN",
"keyid",
};
int len;
const u_char *data;
printf("%s:", NPSTR(ISAKMP_NPTYPE_ID));
p = (struct isakmp_pl_id *)ext;
TCHECK(*p);
safememcpy(&id, ext, sizeof(id));
if (sizeof(*p) < item_len) {
data = (u_char *)(p + 1);
len = item_len - sizeof(*p);
} else {
data = NULL;
len = 0;
}
#if 0 /*debug*/
printf(" [phase=%d doi=%d proto=%d]", phase, doi, proto);
#endif
switch (phase) {
#ifndef USE_IPSECDOI_IN_PHASE1
case 1:
#endif
default:
printf(" idtype=%s", STR_OR_ID(id.d.id_type, idtypestr));
printf(" doi_data=%u",
(u_int32_t)(ntohl(id.d.doi_data) & 0xffffff));
break;
#ifdef USE_IPSECDOI_IN_PHASE1
case 1:
#endif
case 2:
{
const struct ipsecdoi_id *p;
struct ipsecdoi_id id;
struct protoent *pe;
p = (struct ipsecdoi_id *)ext;
TCHECK(*p);
safememcpy(&id, ext, sizeof(id));
printf(" idtype=%s", STR_OR_ID(id.type, ipsecidtypestr));
if (id.proto_id) {
#ifndef WIN32
setprotoent(1);
#endif /* WIN32 */
pe = getprotobynumber(id.proto_id);
if (pe)
printf(" protoid=%s", pe->p_name);
#ifndef WIN32
endprotoent();
#endif /* WIN32 */
} else {
/* it DOES NOT mean IPPROTO_IP! */
printf(" protoid=%s", "0");
}
printf(" port=%d", ntohs(id.port));
if (!len)
break;
if (data == NULL)
goto trunc;
TCHECK2(*data, len);
switch (id.type) {
case IPSECDOI_ID_IPV4_ADDR:
if (len < 4)
printf(" len=%d [bad: < 4]", len);
else
printf(" len=%d %s", len, ipaddr_string(data));
len = 0;
break;
case IPSECDOI_ID_FQDN:
case IPSECDOI_ID_USER_FQDN:
{
int i;
printf(" len=%d ", len);
for (i = 0; i < len; i++)
safeputchar(data[i]);
len = 0;
break;
}
case IPSECDOI_ID_IPV4_ADDR_SUBNET:
{
const u_char *mask;
if (len < 8)
printf(" len=%d [bad: < 8]", len);
else {
mask = data + sizeof(struct in_addr);
printf(" len=%d %s/%u.%u.%u.%u", len,
ipaddr_string(data),
mask[0], mask[1], mask[2], mask[3]);
}
len = 0;
break;
}
#ifdef INET6
case IPSECDOI_ID_IPV6_ADDR:
if (len < 16)
printf(" len=%d [bad: < 16]", len);
else
printf(" len=%d %s", len, ip6addr_string(data));
len = 0;
break;
case IPSECDOI_ID_IPV6_ADDR_SUBNET:
{
const u_int32_t *mask;
if (len < 20)
printf(" len=%d [bad: < 20]", len);
else {
mask = (u_int32_t *)(data + sizeof(struct in6_addr));
/*XXX*/
printf(" len=%d %s/0x%08x%08x%08x%08x", len,
ip6addr_string(data),
mask[0], mask[1], mask[2], mask[3]);
}
len = 0;
break;
}
#endif /*INET6*/
case IPSECDOI_ID_IPV4_ADDR_RANGE:
if (len < 8)
printf(" len=%d [bad: < 8]", len);
else {
printf(" len=%d %s-%s", len,
ipaddr_string(data),
ipaddr_string(data + sizeof(struct in_addr)));
}
len = 0;
break;
#ifdef INET6
case IPSECDOI_ID_IPV6_ADDR_RANGE:
if (len < 32)
printf(" len=%d [bad: < 32]", len);
else {
printf(" len=%d %s-%s", len,
ip6addr_string(data),
ip6addr_string(data + sizeof(struct in6_addr)));
}
len = 0;
break;
#endif /*INET6*/
case IPSECDOI_ID_DER_ASN1_DN:
case IPSECDOI_ID_DER_ASN1_GN:
case IPSECDOI_ID_KEY_ID:
break;
}
break;
}
}
if (data && len) {
printf(" len=%d", len);
if (2 < vflag) {
printf(" ");
if (!rawprint((caddr_t)data, len))
goto trunc;
}
}
return (u_char *)ext + item_len;
trunc:
printf(" [|%s]", NPSTR(ISAKMP_NPTYPE_ID));
return NULL;
}
static const u_char *
isakmp_cert_print(const struct isakmp_gen *ext, u_int item_len _U_,
const u_char *ep _U_, u_int32_t phase _U_,
u_int32_t doi0 _U_,
u_int32_t proto0 _U_, int depth _U_)
{
const struct isakmp_pl_cert *p;
struct isakmp_pl_cert cert;
static const char *certstr[] = {
"none", "pkcs7", "pgp", "dns",
"x509sign", "x509ke", "kerberos", "crl",
"arl", "spki", "x509attr",
};
printf("%s:", NPSTR(ISAKMP_NPTYPE_CERT));
p = (struct isakmp_pl_cert *)ext;
TCHECK(*p);
safememcpy(&cert, ext, sizeof(cert));
printf(" len=%d", item_len - 4);
printf(" type=%s", STR_OR_ID((cert.encode), certstr));
if (2 < vflag && 4 < item_len) {
printf(" ");
if (!rawprint((caddr_t)(ext + 1), item_len - 4))
goto trunc;
}
return (u_char *)ext + item_len;
trunc:
printf(" [|%s]", NPSTR(ISAKMP_NPTYPE_CERT));
return NULL;
}
static const u_char *
isakmp_cr_print(const struct isakmp_gen *ext, u_int item_len _U_,
const u_char *ep _U_, u_int32_t phase _U_, u_int32_t doi0 _U_,
u_int32_t proto0 _U_, int depth _U_)
{
const struct isakmp_pl_cert *p;
struct isakmp_pl_cert cert;
static const char *certstr[] = {
"none", "pkcs7", "pgp", "dns",
"x509sign", "x509ke", "kerberos", "crl",
"arl", "spki", "x509attr",
};
printf("%s:", NPSTR(ISAKMP_NPTYPE_CR));
p = (struct isakmp_pl_cert *)ext;
TCHECK(*p);
safememcpy(&cert, ext, sizeof(cert));
printf(" len=%d", item_len - 4);
printf(" type=%s", STR_OR_ID((cert.encode), certstr));
if (2 < vflag && 4 < item_len) {
printf(" ");
if (!rawprint((caddr_t)(ext + 1), item_len - 4))
goto trunc;
}
return (u_char *)ext + item_len;
trunc:
printf(" [|%s]", NPSTR(ISAKMP_NPTYPE_CR));
return NULL;
}
static const u_char *
isakmp_hash_print(const struct isakmp_gen *ext, u_int item_len _U_,
const u_char *ep _U_, u_int32_t phase _U_, u_int32_t doi _U_,
u_int32_t proto _U_, int depth _U_)
{
struct isakmp_gen e;
printf("%s:", NPSTR(ISAKMP_NPTYPE_HASH));
TCHECK(*ext);
safememcpy(&e, ext, sizeof(e));
printf(" len=%d", ntohs(e.len) - 4);
if (2 < vflag && 4 < ntohs(e.len)) {
printf(" ");
if (!rawprint((caddr_t)(ext + 1), ntohs(e.len) - 4))
goto trunc;
}
return (u_char *)ext + ntohs(e.len);
trunc:
printf(" [|%s]", NPSTR(ISAKMP_NPTYPE_HASH));
return NULL;
}
static const u_char *
isakmp_sig_print(const struct isakmp_gen *ext, u_int item_len _U_,
const u_char *ep _U_, u_int32_t phase _U_, u_int32_t doi _U_,
u_int32_t proto _U_, int depth _U_)
{
struct isakmp_gen e;
printf("%s:", NPSTR(ISAKMP_NPTYPE_SIG));
TCHECK(*ext);
safememcpy(&e, ext, sizeof(e));
printf(" len=%d", ntohs(e.len) - 4);
if (2 < vflag && 4 < ntohs(e.len)) {
printf(" ");
if (!rawprint((caddr_t)(ext + 1), ntohs(e.len) - 4))
goto trunc;
}
return (u_char *)ext + ntohs(e.len);
trunc:
printf(" [|%s]", NPSTR(ISAKMP_NPTYPE_SIG));
return NULL;
}
static const u_char *
isakmp_nonce_print(const struct isakmp_gen *ext,
u_int item_len _U_,
const u_char *ep _U_,
u_int32_t phase _U_, u_int32_t doi _U_,
u_int32_t proto _U_, int depth _U_)
{
struct isakmp_gen e;
printf("%s:", NPSTR(ISAKMP_NPTYPE_NONCE));
TCHECK(*ext);
safememcpy(&e, ext, sizeof(e));
printf(" n len=%d", ntohs(e.len) - 4);
if (2 < vflag && 4 < ntohs(e.len)) {
printf(" ");
if (!rawprint((caddr_t)(ext + 1), ntohs(e.len) - 4))
goto trunc;
}
return (u_char *)ext + ntohs(e.len);
trunc:
printf(" [|%s]", NPSTR(ISAKMP_NPTYPE_NONCE));
return NULL;
}
static const u_char *
isakmp_n_print(const struct isakmp_gen *ext, u_int item_len,
const u_char *ep, u_int32_t phase, u_int32_t doi0 _U_,
u_int32_t proto0 _U_, int depth)
{
struct isakmp_pl_n *p, n;
const u_char *cp;
u_char *ep2;
u_int32_t doi;
u_int32_t proto;
static const char *notify_error_str[] = {
NULL, "INVALID-PAYLOAD-TYPE",
"DOI-NOT-SUPPORTED", "SITUATION-NOT-SUPPORTED",
"INVALID-COOKIE", "INVALID-MAJOR-VERSION",
"INVALID-MINOR-VERSION", "INVALID-EXCHANGE-TYPE",
"INVALID-FLAGS", "INVALID-MESSAGE-ID",
"INVALID-PROTOCOL-ID", "INVALID-SPI",
"INVALID-TRANSFORM-ID", "ATTRIBUTES-NOT-SUPPORTED",
"NO-PROPOSAL-CHOSEN", "BAD-PROPOSAL-SYNTAX",
"PAYLOAD-MALFORMED", "INVALID-KEY-INFORMATION",
"INVALID-ID-INFORMATION", "INVALID-CERT-ENCODING",
"INVALID-CERTIFICATE", "CERT-TYPE-UNSUPPORTED",
"INVALID-CERT-AUTHORITY", "INVALID-HASH-INFORMATION",
"AUTHENTICATION-FAILED", "INVALID-SIGNATURE",
"ADDRESS-NOTIFICATION", "NOTIFY-SA-LIFETIME",
"CERTIFICATE-UNAVAILABLE", "UNSUPPORTED-EXCHANGE-TYPE",
"UNEQUAL-PAYLOAD-LENGTHS",
};
static const char *ipsec_notify_error_str[] = {
"RESERVED",
};
static const char *notify_status_str[] = {
"CONNECTED",
};
static const char *ipsec_notify_status_str[] = {
"RESPONDER-LIFETIME", "REPLAY-STATUS",
"INITIAL-CONTACT",
};
/* NOTE: these macro must be called with x in proper range */
/* 0 - 8191 */
#define NOTIFY_ERROR_STR(x) \
STR_OR_ID((x), notify_error_str)
/* 8192 - 16383 */
#define IPSEC_NOTIFY_ERROR_STR(x) \
STR_OR_ID((u_int)((x) - 8192), ipsec_notify_error_str)
/* 16384 - 24575 */
#define NOTIFY_STATUS_STR(x) \
STR_OR_ID((u_int)((x) - 16384), notify_status_str)
/* 24576 - 32767 */
#define IPSEC_NOTIFY_STATUS_STR(x) \
STR_OR_ID((u_int)((x) - 24576), ipsec_notify_status_str)
printf("%s:", NPSTR(ISAKMP_NPTYPE_N));
p = (struct isakmp_pl_n *)ext;
TCHECK(*p);
safememcpy(&n, ext, sizeof(n));
doi = ntohl(n.doi);
proto = n.prot_id;
if (doi != 1) {
printf(" doi=%d", doi);
printf(" proto=%d", proto);
if (ntohs(n.type) < 8192)
printf(" type=%s", NOTIFY_ERROR_STR(ntohs(n.type)));
else if (ntohs(n.type) < 16384)
printf(" type=%s", numstr(ntohs(n.type)));
else if (ntohs(n.type) < 24576)
printf(" type=%s", NOTIFY_STATUS_STR(ntohs(n.type)));
else
printf(" type=%s", numstr(ntohs(n.type)));
if (n.spi_size) {
printf(" spi=");
if (!rawprint((caddr_t)(p + 1), n.spi_size))
goto trunc;
}
return (u_char *)(p + 1) + n.spi_size;
}
printf(" doi=ipsec");
printf(" proto=%s", PROTOIDSTR(proto));
if (ntohs(n.type) < 8192)
printf(" type=%s", NOTIFY_ERROR_STR(ntohs(n.type)));
else if (ntohs(n.type) < 16384)
printf(" type=%s", IPSEC_NOTIFY_ERROR_STR(ntohs(n.type)));
else if (ntohs(n.type) < 24576)
printf(" type=%s", NOTIFY_STATUS_STR(ntohs(n.type)));
else if (ntohs(n.type) < 32768)
printf(" type=%s", IPSEC_NOTIFY_STATUS_STR(ntohs(n.type)));
else
printf(" type=%s", numstr(ntohs(n.type)));
if (n.spi_size) {
printf(" spi=");
if (!rawprint((caddr_t)(p + 1), n.spi_size))
goto trunc;
}
cp = (u_char *)(p + 1) + n.spi_size;
ep2 = (u_char *)p + item_len;
if (cp < ep) {
printf(" orig=(");
switch (ntohs(n.type)) {
case IPSECDOI_NTYPE_RESPONDER_LIFETIME:
{
const struct attrmap *map = oakley_t_map;
size_t nmap = sizeof(oakley_t_map)/sizeof(oakley_t_map[0]);
while (cp < ep && cp < ep2) {
cp = isakmp_attrmap_print(cp,
(ep < ep2) ? ep : ep2, map, nmap);
}
break;
}
case IPSECDOI_NTYPE_REPLAY_STATUS:
printf("replay detection %sabled",
(*(u_int32_t *)cp) ? "en" : "dis");
break;
case ISAKMP_NTYPE_NO_PROPOSAL_CHOSEN:
if (isakmp_sub_print(ISAKMP_NPTYPE_SA,
(struct isakmp_gen *)cp, ep, phase, doi, proto,
depth) == NULL)
return NULL;
break;
default:
/* NULL is dummy */
isakmp_print(gndo, cp,
item_len - sizeof(*p) - n.spi_size,
NULL);
}
printf(")");
}
return (u_char *)ext + item_len;
trunc:
printf(" [|%s]", NPSTR(ISAKMP_NPTYPE_N));
return NULL;
}
static const u_char *
isakmp_d_print(const struct isakmp_gen *ext, u_int item_len _U_,
const u_char *ep _U_, u_int32_t phase _U_, u_int32_t doi0 _U_,
u_int32_t proto0 _U_, int depth _U_)
{
const struct isakmp_pl_d *p;
struct isakmp_pl_d d;
const u_int8_t *q;
u_int32_t doi;
u_int32_t proto;
int i;
printf("%s:", NPSTR(ISAKMP_NPTYPE_D));
p = (struct isakmp_pl_d *)ext;
TCHECK(*p);
safememcpy(&d, ext, sizeof(d));
doi = ntohl(d.doi);
proto = d.prot_id;
if (doi != 1) {
printf(" doi=%u", doi);
printf(" proto=%u", proto);
} else {
printf(" doi=ipsec");
printf(" proto=%s", PROTOIDSTR(proto));
}
printf(" spilen=%u", d.spi_size);
printf(" nspi=%u", ntohs(d.num_spi));
printf(" spi=");
q = (u_int8_t *)(p + 1);
for (i = 0; i < ntohs(d.num_spi); i++) {
if (i != 0)
printf(",");
if (!rawprint((caddr_t)q, d.spi_size))
goto trunc;
q += d.spi_size;
}
return q;
trunc:
printf(" [|%s]", NPSTR(ISAKMP_NPTYPE_D));
return NULL;
}
static const u_char *
isakmp_vid_print(const struct isakmp_gen *ext,
u_int item_len _U_, const u_char *ep _U_,
u_int32_t phase _U_, u_int32_t doi _U_,
u_int32_t proto _U_, int depth _U_)
{
struct isakmp_gen e;
printf("%s:", NPSTR(ISAKMP_NPTYPE_VID));
TCHECK(*ext);
safememcpy(&e, ext, sizeof(e));
printf(" len=%d", ntohs(e.len) - 4);
if (2 < vflag && 4 < ntohs(e.len)) {
printf(" ");
if (!rawprint((caddr_t)(ext + 1), ntohs(e.len) - 4))
goto trunc;
}
return (u_char *)ext + ntohs(e.len);
trunc:
printf(" [|%s]", NPSTR(ISAKMP_NPTYPE_VID));
return NULL;
}
static const u_char *
isakmp_sub0_print(u_char np, const struct isakmp_gen *ext, const u_char *ep,
u_int32_t phase, u_int32_t doi, u_int32_t proto, int depth)
{
const u_char *cp;
struct isakmp_gen e;
u_int item_len;
cp = (u_char *)ext;
TCHECK(*ext);
safememcpy(&e, ext, sizeof(e));
/*
* Since we can't have a payload length of less than 4 bytes,
* we need to bail out here if the generic header is nonsensical
* or truncated, otherwise we could loop forever processing
* zero-length items or otherwise misdissect the packet.
*/
item_len = ntohs(e.len);
if (item_len <= 4)
return NULL;
if (NPFUNC(np)) {
/*
* XXX - what if item_len is too short, or too long,
* for this payload type?
*/
cp = (*npfunc[np])(ext, item_len, ep, phase, doi, proto, depth);
} else {
printf("%s", NPSTR(np));
cp += item_len;
}
return cp;
trunc:
printf(" [|isakmp]");
return NULL;
}
static const u_char *
isakmp_sub_print(u_char np, const struct isakmp_gen *ext, const u_char *ep,
u_int32_t phase, u_int32_t doi, u_int32_t proto, int depth)
{
const u_char *cp;
int i;
struct isakmp_gen e;
cp = (const u_char *)ext;
while (np) {
TCHECK(*ext);
safememcpy(&e, ext, sizeof(e));
TCHECK2(*ext, ntohs(e.len));
depth++;
printf("\n");
for (i = 0; i < depth; i++)
printf(" ");
printf("(");
cp = isakmp_sub0_print(np, ext, ep, phase, doi, proto, depth);
printf(")");
depth--;
if (cp == NULL) {
/* Zero-length subitem */
return NULL;
}
np = e.np;
ext = (struct isakmp_gen *)cp;
}
return cp;
trunc:
printf(" [|%s]", NPSTR(np));
return NULL;
}
static char *
numstr(int x)
{
static char buf[20];
snprintf(buf, sizeof(buf), "#%d", x);
return buf;
}
/*
* some compiler tries to optimize memcpy(), using the alignment constraint
* on the argument pointer type. by using this function, we try to avoid the
* optimization.
*/
static void
safememcpy(void *p, const void *q, size_t l)
{
memcpy(p, q, l);
}
void
isakmp_print(netdissect_options *ndo,
const u_char *bp, u_int length,
const u_char *bp2)
{
const struct isakmp *p;
struct isakmp base;
const u_char *ep;
u_char np;
int i;
int phase;
int major, minor;
p = (const struct isakmp *)bp;
ep = ndo->ndo_snapend;
if ((struct isakmp *)ep < p + 1) {
printf("[|isakmp]");
return;
}
safememcpy(&base, p, sizeof(base));
printf("isakmp");
if (vflag) {
major = (base.vers & ISAKMP_VERS_MAJOR)
>> ISAKMP_VERS_MAJOR_SHIFT;
minor = (base.vers & ISAKMP_VERS_MINOR)
>> ISAKMP_VERS_MINOR_SHIFT;
printf(" %d.%d", major, minor);
}
if (vflag) {
printf(" msgid ");
rawprint((caddr_t)&base.msgid, sizeof(base.msgid));
}
if (1 < vflag) {
printf(" cookie ");
rawprint((caddr_t)&base.i_ck, sizeof(base.i_ck));
printf("->");
rawprint((caddr_t)&base.r_ck, sizeof(base.r_ck));
}
printf(":");
phase = (*(u_int32_t *)base.msgid == 0) ? 1 : 2;
if (phase == 1)
printf(" phase %d", phase);
else
printf(" phase %d/others", phase);
i = cookie_find(&base.i_ck);
if (i < 0) {
if (iszero((u_char *)&base.r_ck, sizeof(base.r_ck))) {
/* the first packet */
printf(" I");
if (bp2)
cookie_record(&base.i_ck, bp2);
} else
printf(" ?");
} else {
if (bp2 && cookie_isinitiator(i, bp2))
printf(" I");
else if (bp2 && cookie_isresponder(i, bp2))
printf(" R");
else
printf(" ?");
}
printf(" %s", ETYPESTR(base.etype));
if (base.flags) {
printf("[%s%s]", base.flags & ISAKMP_FLAG_E ? "E" : "",
base.flags & ISAKMP_FLAG_C ? "C" : "");
}
if (vflag) {
const struct isakmp_gen *ext;
int nparen;
#define CHECKLEN(p, np) \
if (ep < (u_char *)(p)) { \
printf(" [|%s]", NPSTR(np)); \
goto done; \
}
printf(":");
/* regardless of phase... */
if (base.flags & ISAKMP_FLAG_E) {
/*
* encrypted, nothing we can do right now.
* we hope to decrypt the packet in the future...
*/
printf(" [encrypted %s]", NPSTR(base.np));
goto done;
}
nparen = 0;
CHECKLEN(p + 1, base.np)
np = base.np;
ext = (struct isakmp_gen *)(p + 1);
isakmp_sub_print(np, ext, ep, phase, 0, 0, 0);
}
done:
if (vflag) {
if (ntohl(base.len) != length) {
printf(" (len mismatch: isakmp %u/ip %u)",
(u_int32_t)ntohl(base.len), length);
}
}
}
void
isakmp_rfc3948_print(netdissect_options *ndo,
const u_char *bp, u_int length,
const u_char *bp2)
{
const u_char *ep;
ep = ndo->ndo_snapend;
if(length == 1 && bp[0]==0xff) {
ND_PRINT((ndo, "isakmp-nat-keep-alive"));
return;
}
if(length < 4) {
goto trunc;
}
/*
* see if this is an IKE packet
*/
if(bp[0]==0 && bp[1]==0 && bp[2]==0 && bp[3]==0) {
ND_PRINT((ndo, "NONESP-encap: "));
isakmp_print(ndo, bp+4, length-4, bp2);
return;
}
/* must be an ESP packet */
{
int nh, enh, padlen;
int advance;
ND_PRINT((ndo, "UDP-encap: "));
advance = esp_print(ndo, bp, length, bp2, &enh, &padlen);
if(advance <= 0)
return;
bp += advance;
length -= advance + padlen;
nh = enh & 0xff;
ip_print_inner(ndo, bp, length, nh, bp2);
return;
}
trunc:
printf("[|isakmp]");
return;
}
/*
* Local Variables:
* c-style: whitesmith
* c-basic-offset: 8
* End:
*/
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