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freebsd/contrib/tcpdump/print-isakmp.c
Rui Paulo 27df3f5ddd Merge tcpdump-4.1.1.
2010-10-28 19:06:17 +00:00

2571 lines
62 KiB
C
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/*
* 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[] _U_ =
"@(#) $Header: /tcpdump/master/tcpdump/print-isakmp.c,v 1.61 2008-02-05 19:34:25 guy Exp $ (LBL)";
#endif
#define NETDISSECT_REWORKED
#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
#define DECLARE_PRINTER(func) static const u_char *ike##func##_print( \
netdissect_options *ndo, u_char tpay, \
const struct isakmp_gen *ext, \
u_int item_len, \
const u_char *end_pointer, \
u_int32_t phase,\
u_int32_t doi0, \
u_int32_t proto0, int depth)
DECLARE_PRINTER(v1_sa);
DECLARE_PRINTER(v1_p);
DECLARE_PRINTER(v1_t);
DECLARE_PRINTER(v1_ke);
DECLARE_PRINTER(v1_id);
DECLARE_PRINTER(v1_cert);
DECLARE_PRINTER(v1_cr);
DECLARE_PRINTER(v1_sig);
DECLARE_PRINTER(v1_hash);
DECLARE_PRINTER(v1_nonce);
DECLARE_PRINTER(v1_n);
DECLARE_PRINTER(v1_d);
DECLARE_PRINTER(v1_vid);
DECLARE_PRINTER(v2_sa);
DECLARE_PRINTER(v2_ke);
DECLARE_PRINTER(v2_ID);
DECLARE_PRINTER(v2_cert);
DECLARE_PRINTER(v2_cr);
DECLARE_PRINTER(v2_auth);
DECLARE_PRINTER(v2_nonce);
DECLARE_PRINTER(v2_n);
DECLARE_PRINTER(v2_d);
DECLARE_PRINTER(v2_vid);
DECLARE_PRINTER(v2_TS);
DECLARE_PRINTER(v2_cp);
DECLARE_PRINTER(v2_eap);
static const u_char *ikev2_e_print(netdissect_options *ndo,
struct isakmp *base,
u_char tpay,
const struct isakmp_gen *ext,
u_int item_len,
const u_char *end_pointer,
u_int32_t phase,
u_int32_t doi0,
u_int32_t proto0, int depth);
static const u_char *ike_sub0_print(netdissect_options *ndo,u_char, const struct isakmp_gen *,
const u_char *, u_int32_t, u_int32_t, u_int32_t, int);
static const u_char *ikev1_sub_print(netdissect_options *ndo,u_char, const struct isakmp_gen *,
const u_char *, u_int32_t, u_int32_t, u_int32_t, int);
static const u_char *ikev2_sub_print(netdissect_options *ndo,
struct isakmp *base,
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);
static char *numstr(int);
static void safememcpy(void *, const void *, size_t);
static void
ikev1_print(netdissect_options *ndo,
const u_char *bp, u_int length,
const u_char *bp2, struct isakmp *base);
#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", /* 0 - 8 */
"sig", "nonce", "n", "d", "vid", /* 9 - 13 */
"pay14", "pay15", "pay16", "pay17", "pay18", /* 14- 18 */
"pay19", "pay20", "pay21", "pay22", "pay23", /* 19- 23 */
"pay24", "pay25", "pay26", "pay27", "pay28", /* 24- 28 */
"pay29", "pay30", "pay31", "pay32", /* 29- 32 */
"v2sa", "v2ke", "v2IDi", "v2IDr", "v2cert",/* 33- 37 */
"v2cr", "v2auth","v2nonce", "v2n", "v2d", /* 38- 42 */
"v2vid", "v2TSi", "v2TSr", "v2e", "v2cp", /* 43- 47 */
"v2eap", /* 48 */
};
/* isakmp->np */
static const u_char *(*npfunc[])(netdissect_options *ndo, u_char tpay,
const struct isakmp_gen *ext,
u_int item_len,
const u_char *end_pointer,
u_int32_t phase,
u_int32_t doi0,
u_int32_t proto0, int depth) = {
NULL,
ikev1_sa_print,
ikev1_p_print,
ikev1_t_print,
ikev1_ke_print,
ikev1_id_print,
ikev1_cert_print,
ikev1_cr_print,
ikev1_hash_print,
ikev1_sig_print,
ikev1_nonce_print,
ikev1_n_print,
ikev1_d_print,
ikev1_vid_print, /* 13 */
NULL, NULL, NULL, NULL, NULL, /* 14- 18 */
NULL, NULL, NULL, NULL, NULL, /* 19- 23 */
NULL, NULL, NULL, NULL, NULL, /* 24- 28 */
NULL, NULL, NULL, NULL, /* 29- 32 */
ikev2_sa_print, /* 33 */
ikev2_ke_print, /* 34 */
ikev2_ID_print, /* 35 */
ikev2_ID_print, /* 36 */
ikev2_cert_print, /* 37 */
ikev2_cr_print, /* 38 */
ikev2_auth_print, /* 39 */
ikev2_nonce_print, /* 40 */
ikev2_n_print, /* 41 */
ikev2_d_print, /* 42 */
ikev2_vid_print, /* 43 */
ikev2_TS_print, /* 44 */
ikev2_TS_print, /* 45 */
NULL, /* ikev2_e_print,*/ /* 46 - special */
ikev2_cp_print, /* 47 */
ikev2_eap_print, /* 48 */
};
/* isakmp->etype */
static const char *etypestr[] = {
/* IKEv1 exchange types */
"none", "base", "ident", "auth", "agg", "inf", NULL, NULL, /* 0-7 */
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, /* 8-15 */
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, /* 16-23 */
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, /* 24-31 */
"oakley-quick", "oakley-newgroup", /* 32-33 */
/* IKEv2 exchange types */
"ikev2_init", "ikev2_auth", "child_sa", "inf2" /* 34-37 */
};
#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 CHECKLEN(p, np) \
if (ep < (u_char *)(p)) { \
ND_PRINT((ndo," [|%s]", NPSTR(np))); \
goto done; \
}
#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
hexprint(netdissect_options *ndo, caddr_t loc, size_t len)
{
u_char *p;
size_t i;
p = (u_char *)loc;
for (i = 0; i < len; i++)
ND_PRINT((ndo,"%02x", p[i] & 0xff));
}
static int
rawprint(netdissect_options *ndo, caddr_t loc, size_t len)
{
ND_TCHECK2(*loc, len);
hexprint(ndo, loc, len);
return 1;
trunc:
return 0;
}
/*
* returns false if we run out of data buffer
*/
static int ike_show_somedata(struct netdissect_options *ndo,
const u_char *cp, const u_char *ep)
{
/* there is too much data, just show some of it */
const u_char *end = ep - 20;
int elen = 20;
int len = ep - cp;
if(len > 10) {
len = 10;
}
/* really shouldn't happen because of above */
if(end < cp + len) {
end = cp+len;
elen = ep - end;
}
ND_PRINT((ndo," data=("));
if(!rawprint(ndo, (caddr_t)(cp), len)) goto trunc;
ND_PRINT((ndo, "..."));
if(elen) {
if(!rawprint(ndo, (caddr_t)(end), elen)) goto trunc;
}
ND_PRINT((ndo,")"));
return 1;
trunc:
return 0;
}
struct attrmap {
const char *type;
u_int nvalue;
const char *value[30]; /*XXX*/
};
static const u_char *
ikev1_attrmap_print(netdissect_options *ndo,
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) {
ND_PRINT((ndo,"[|attr]"));
return ep + 1;
}
ND_PRINT((ndo,"("));
t = EXTRACT_16BITS(&q[0]) & 0x7fff;
if (map && t < nmap && map[t].type)
ND_PRINT((ndo,"type=%s ", map[t].type));
else
ND_PRINT((ndo,"type=#%d ", t));
if (p[0] & 0x80) {
ND_PRINT((ndo,"value="));
v = EXTRACT_16BITS(&q[1]);
if (map && t < nmap && v < map[t].nvalue && map[t].value[v])
ND_PRINT((ndo,"%s", map[t].value[v]));
else
rawprint(ndo, (caddr_t)&q[1], 2);
} else {
ND_PRINT((ndo,"len=%d value=", EXTRACT_16BITS(&q[1])));
rawprint(ndo, (caddr_t)&p[4], EXTRACT_16BITS(&q[1]));
}
ND_PRINT((ndo,")"));
return p + totlen;
}
static const u_char *
ikev1_attr_print(netdissect_options *ndo, 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) {
ND_PRINT((ndo,"[|attr]"));
return ep + 1;
}
ND_PRINT((ndo,"("));
t = EXTRACT_16BITS(&q[0]) & 0x7fff;
ND_PRINT((ndo,"type=#%d ", t));
if (p[0] & 0x80) {
ND_PRINT((ndo,"value="));
t = q[1];
rawprint(ndo, (caddr_t)&q[1], 2);
} else {
ND_PRINT((ndo,"len=%d value=", EXTRACT_16BITS(&q[1])));
rawprint(ndo, (caddr_t)&p[2], EXTRACT_16BITS(&q[1]));
}
ND_PRINT((ndo,")"));
return p + totlen;
}
static const u_char *
ikev1_sa_print(netdissect_options *ndo, u_char tpay _U_,
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 ikev1_pl_sa *p;
struct ikev1_pl_sa sa;
const u_int32_t *q;
u_int32_t doi, sit, ident;
const u_char *cp, *np;
int t;
ND_PRINT((ndo,"%s:", NPSTR(ISAKMP_NPTYPE_SA)));
p = (struct ikev1_pl_sa *)ext;
ND_TCHECK(*p);
safememcpy(&sa, ext, sizeof(sa));
doi = ntohl(sa.doi);
sit = ntohl(sa.sit);
if (doi != 1) {
ND_PRINT((ndo," doi=%d", doi));
ND_PRINT((ndo," situation=%u", (u_int32_t)ntohl(sa.sit)));
return (u_char *)(p + 1);
}
ND_PRINT((ndo," doi=ipsec"));
q = (u_int32_t *)&sa.sit;
ND_PRINT((ndo," situation="));
t = 0;
if (sit & 0x01) {
ND_PRINT((ndo,"identity"));
t++;
}
if (sit & 0x02) {
ND_PRINT((ndo,"%ssecrecy", t ? "+" : ""));
t++;
}
if (sit & 0x04)
ND_PRINT((ndo,"%sintegrity", t ? "+" : ""));
np = (u_char *)ext + sizeof(sa);
if (sit != 0x01) {
ND_TCHECK2(*(ext + 1), sizeof(ident));
safememcpy(&ident, ext + 1, sizeof(ident));
ND_PRINT((ndo," ident=%u", (u_int32_t)ntohl(ident)));
np += sizeof(ident);
}
ext = (struct isakmp_gen *)np;
ND_TCHECK(*ext);
cp = ikev1_sub_print(ndo, ISAKMP_NPTYPE_P, ext, ep, phase, doi, proto0,
depth);
return cp;
trunc:
ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_SA)));
return NULL;
}
static const u_char *
ikev1_p_print(netdissect_options *ndo, u_char tpay _U_,
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 ikev1_pl_p *p;
struct ikev1_pl_p prop;
const u_char *cp;
ND_PRINT((ndo,"%s:", NPSTR(ISAKMP_NPTYPE_P)));
p = (struct ikev1_pl_p *)ext;
ND_TCHECK(*p);
safememcpy(&prop, ext, sizeof(prop));
ND_PRINT((ndo," #%d protoid=%s transform=%d",
prop.p_no, PROTOIDSTR(prop.prot_id), prop.num_t));
if (prop.spi_size) {
ND_PRINT((ndo," spi="));
if (!rawprint(ndo, (caddr_t)(p + 1), prop.spi_size))
goto trunc;
}
ext = (struct isakmp_gen *)((u_char *)(p + 1) + prop.spi_size);
ND_TCHECK(*ext);
cp = ikev1_sub_print(ndo, ISAKMP_NPTYPE_T, ext, ep, phase, doi0,
prop.prot_id, depth);
return cp;
trunc:
ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_P)));
return NULL;
}
static const char *ikev1_p_map[] = {
NULL, "ike",
};
static const char *ikev2_t_type_map[]={
NULL, "encr", "prf", "integ", "dh", "esn"
};
static const char *ah_p_map[] = {
NULL, "(reserved)", "md5", "sha", "1des",
"sha2-256", "sha2-384", "sha2-512",
};
static const char *prf_p_map[] = {
NULL, "hmac-md5", "hmac-sha", "hmac-tiger",
"aes128_xcbc"
};
static const char *integ_p_map[] = {
NULL, "hmac-md5", "hmac-sha", "dec-mac",
"kpdk-md5", "aes-xcbc"
};
static const char *esn_p_map[] = {
"no-esn", "esn"
};
static const char *dh_p_map[] = {
NULL, "modp768",
"modp1024", /* group 2 */
"EC2N 2^155", /* group 3 */
"EC2N 2^185", /* group 4 */
"modp1536", /* group 5 */
"iana-grp06", "iana-grp07", /* reserved */
"iana-grp08", "iana-grp09",
"iana-grp10", "iana-grp11",
"iana-grp12", "iana-grp13",
"modp2048", /* group 14 */
"modp3072", /* group 15 */
"modp4096", /* group 16 */
"modp6144", /* group 17 */
"modp8192", /* group 18 */
};
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", 18, { NULL, "modp768",
"modp1024", /* group 2 */
"EC2N 2^155", /* group 3 */
"EC2N 2^185", /* group 4 */
"modp1536", /* group 5 */
"iana-grp06", "iana-grp07", /* reserved */
"iana-grp08", "iana-grp09",
"iana-grp10", "iana-grp11",
"iana-grp12", "iana-grp13",
"modp2048", /* group 14 */
"modp3072", /* group 15 */
"modp4096", /* group 16 */
"modp6144", /* group 17 */
"modp8192", /* group 18 */
}, },
{ "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 encr_t_map[] = {
{ NULL, 0, { NULL } }, { NULL, 0, { NULL } }, /* 0, 1 */
{ NULL, 0, { NULL } }, { NULL, 0, { NULL } }, /* 2, 3 */
{ NULL, 0, { NULL } }, { NULL, 0, { NULL } }, /* 4, 5 */
{ NULL, 0, { NULL } }, { NULL, 0, { NULL } }, /* 6, 7 */
{ NULL, 0, { NULL } }, { NULL, 0, { NULL } }, /* 8, 9 */
{ NULL, 0, { NULL } }, { NULL, 0, { NULL } }, /* 10,11*/
{ NULL, 0, { NULL } }, { NULL, 0, { NULL } }, /* 12,13*/
{ "keylen", 14, { 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", 18, { NULL, "modp768",
"modp1024", /* group 2 */
"EC2N 2^155", /* group 3 */
"EC2N 2^185", /* group 4 */
"modp1536", /* group 5 */
"iana-grp06", "iana-grp07", /* reserved */
"iana-grp08", "iana-grp09",
"iana-grp10", "iana-grp11",
"iana-grp12", "iana-grp13",
"modp2048", /* group 14 */
"modp3072", /* group 15 */
"modp4096", /* group 16 */
"modp6144", /* group 17 */
"modp8192", /* group 18 */
}, },
{ "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 *
ikev1_t_print(netdissect_options *ndo, u_char tpay _U_,
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 ikev1_pl_t *p;
struct ikev1_pl_t t;
const u_char *cp;
const char *idstr;
const struct attrmap *map;
size_t nmap;
const u_char *ep2;
ND_PRINT((ndo,"%s:", NPSTR(ISAKMP_NPTYPE_T)));
p = (struct ikev1_pl_t *)ext;
ND_TCHECK(*p);
safememcpy(&t, ext, sizeof(t));
switch (proto) {
case 1:
idstr = STR_OR_ID(t.t_id, ikev1_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)
ND_PRINT((ndo," #%d id=%s ", t.t_no, idstr));
else
ND_PRINT((ndo," #%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 = ikev1_attrmap_print(ndo, cp, (ep < ep2) ? ep : ep2,
map, nmap);
} else
cp = ikev1_attr_print(ndo, cp, (ep < ep2) ? ep : ep2);
}
if (ep < ep2)
ND_PRINT((ndo,"..."));
return cp;
trunc:
ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_T)));
return NULL;
}
static const u_char *
ikev1_ke_print(netdissect_options *ndo, u_char tpay _U_,
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;
ND_PRINT((ndo,"%s:", NPSTR(ISAKMP_NPTYPE_KE)));
ND_TCHECK(*ext);
safememcpy(&e, ext, sizeof(e));
ND_PRINT((ndo," key len=%d", ntohs(e.len) - 4));
if (2 < ndo->ndo_vflag && 4 < ntohs(e.len)) {
ND_PRINT((ndo," "));
if (!rawprint(ndo, (caddr_t)(ext + 1), ntohs(e.len) - 4))
goto trunc;
}
return (u_char *)ext + ntohs(e.len);
trunc:
ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_KE)));
return NULL;
}
static const u_char *
ikev1_id_print(netdissect_options *ndo, u_char tpay _U_,
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 ikev1_pl_id *p;
struct ikev1_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;
ND_PRINT((ndo,"%s:", NPSTR(ISAKMP_NPTYPE_ID)));
p = (struct ikev1_pl_id *)ext;
ND_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*/
ND_PRINT((ndo," [phase=%d doi=%d proto=%d]", phase, doi, proto));
#endif
switch (phase) {
#ifndef USE_IPSECDOI_IN_PHASE1
case 1:
#endif
default:
ND_PRINT((ndo," idtype=%s", STR_OR_ID(id.d.id_type, idtypestr)));
ND_PRINT((ndo," 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;
ND_TCHECK(*p);
safememcpy(&id, ext, sizeof(id));
ND_PRINT((ndo," 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)
ND_PRINT((ndo," protoid=%s", pe->p_name));
#ifndef WIN32
endprotoent();
#endif /* WIN32 */
} else {
/* it DOES NOT mean IPPROTO_IP! */
ND_PRINT((ndo," protoid=%s", "0"));
}
ND_PRINT((ndo," port=%d", ntohs(id.port)));
if (!len)
break;
if (data == NULL)
goto trunc;
ND_TCHECK2(*data, len);
switch (id.type) {
case IPSECDOI_ID_IPV4_ADDR:
if (len < 4)
ND_PRINT((ndo," len=%d [bad: < 4]", len));
else
ND_PRINT((ndo," len=%d %s", len, ipaddr_string(data)));
len = 0;
break;
case IPSECDOI_ID_FQDN:
case IPSECDOI_ID_USER_FQDN:
{
int i;
ND_PRINT((ndo," 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)
ND_PRINT((ndo," len=%d [bad: < 8]", len));
else {
mask = data + sizeof(struct in_addr);
ND_PRINT((ndo," 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)
ND_PRINT((ndo," len=%d [bad: < 16]", len));
else
ND_PRINT((ndo," len=%d %s", len, ip6addr_string(data)));
len = 0;
break;
case IPSECDOI_ID_IPV6_ADDR_SUBNET:
{
const u_int32_t *mask;
if (len < 20)
ND_PRINT((ndo," len=%d [bad: < 20]", len));
else {
mask = (u_int32_t *)(data + sizeof(struct in6_addr));
/*XXX*/
ND_PRINT((ndo," 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)
ND_PRINT((ndo," len=%d [bad: < 8]", len));
else {
ND_PRINT((ndo," 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)
ND_PRINT((ndo," len=%d [bad: < 32]", len));
else {
ND_PRINT((ndo," 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) {
ND_PRINT((ndo," len=%d", len));
if (2 < ndo->ndo_vflag) {
ND_PRINT((ndo," "));
if (!rawprint(ndo, (caddr_t)data, len))
goto trunc;
}
}
return (u_char *)ext + item_len;
trunc:
ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_ID)));
return NULL;
}
static const u_char *
ikev1_cert_print(netdissect_options *ndo, u_char tpay _U_,
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 ikev1_pl_cert *p;
struct ikev1_pl_cert cert;
static const char *certstr[] = {
"none", "pkcs7", "pgp", "dns",
"x509sign", "x509ke", "kerberos", "crl",
"arl", "spki", "x509attr",
};
ND_PRINT((ndo,"%s:", NPSTR(ISAKMP_NPTYPE_CERT)));
p = (struct ikev1_pl_cert *)ext;
ND_TCHECK(*p);
safememcpy(&cert, ext, sizeof(cert));
ND_PRINT((ndo," len=%d", item_len - 4));
ND_PRINT((ndo," type=%s", STR_OR_ID((cert.encode), certstr)));
if (2 < ndo->ndo_vflag && 4 < item_len) {
ND_PRINT((ndo," "));
if (!rawprint(ndo, (caddr_t)(ext + 1), item_len - 4))
goto trunc;
}
return (u_char *)ext + item_len;
trunc:
ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_CERT)));
return NULL;
}
static const u_char *
ikev1_cr_print(netdissect_options *ndo, u_char tpay _U_,
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 ikev1_pl_cert *p;
struct ikev1_pl_cert cert;
static const char *certstr[] = {
"none", "pkcs7", "pgp", "dns",
"x509sign", "x509ke", "kerberos", "crl",
"arl", "spki", "x509attr",
};
ND_PRINT((ndo,"%s:", NPSTR(ISAKMP_NPTYPE_CR)));
p = (struct ikev1_pl_cert *)ext;
ND_TCHECK(*p);
safememcpy(&cert, ext, sizeof(cert));
ND_PRINT((ndo," len=%d", item_len - 4));
ND_PRINT((ndo," type=%s", STR_OR_ID((cert.encode), certstr)));
if (2 < ndo->ndo_vflag && 4 < item_len) {
ND_PRINT((ndo," "));
if (!rawprint(ndo, (caddr_t)(ext + 1), item_len - 4))
goto trunc;
}
return (u_char *)ext + item_len;
trunc:
ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_CR)));
return NULL;
}
static const u_char *
ikev1_hash_print(netdissect_options *ndo, u_char tpay _U_,
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;
ND_PRINT((ndo,"%s:", NPSTR(ISAKMP_NPTYPE_HASH)));
ND_TCHECK(*ext);
safememcpy(&e, ext, sizeof(e));
ND_PRINT((ndo," len=%d", ntohs(e.len) - 4));
if (2 < ndo->ndo_vflag && 4 < ntohs(e.len)) {
ND_PRINT((ndo," "));
if (!rawprint(ndo, (caddr_t)(ext + 1), ntohs(e.len) - 4))
goto trunc;
}
return (u_char *)ext + ntohs(e.len);
trunc:
ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_HASH)));
return NULL;
}
static const u_char *
ikev1_sig_print(netdissect_options *ndo, u_char tpay _U_,
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;
ND_PRINT((ndo,"%s:", NPSTR(ISAKMP_NPTYPE_SIG)));
ND_TCHECK(*ext);
safememcpy(&e, ext, sizeof(e));
ND_PRINT((ndo," len=%d", ntohs(e.len) - 4));
if (2 < ndo->ndo_vflag && 4 < ntohs(e.len)) {
ND_PRINT((ndo," "));
if (!rawprint(ndo, (caddr_t)(ext + 1), ntohs(e.len) - 4))
goto trunc;
}
return (u_char *)ext + ntohs(e.len);
trunc:
ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_SIG)));
return NULL;
}
static const u_char *
ikev1_nonce_print(netdissect_options *ndo, u_char tpay _U_,
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;
ND_PRINT((ndo,"%s:", NPSTR(ISAKMP_NPTYPE_NONCE)));
ND_TCHECK(*ext);
safememcpy(&e, ext, sizeof(e));
ND_PRINT((ndo," n len=%d", ntohs(e.len) - 4));
if (2 < ndo->ndo_vflag && 4 < ntohs(e.len)) {
ND_PRINT((ndo," "));
if (!rawprint(ndo, (caddr_t)(ext + 1), ntohs(e.len) - 4))
goto trunc;
} else if (1 < ndo->ndo_vflag && 4 < ntohs(e.len)) {
ND_PRINT((ndo," "));
if (!ike_show_somedata(ndo, (u_char *)(caddr_t)(ext + 1), ep))
goto trunc;
}
return (u_char *)ext + ntohs(e.len);
trunc:
ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_NONCE)));
return NULL;
}
static const u_char *
ikev1_n_print(netdissect_options *ndo, u_char tpay _U_,
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 ikev1_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)
ND_PRINT((ndo,"%s:", NPSTR(ISAKMP_NPTYPE_N)));
p = (struct ikev1_pl_n *)ext;
ND_TCHECK(*p);
safememcpy(&n, ext, sizeof(n));
doi = ntohl(n.doi);
proto = n.prot_id;
if (doi != 1) {
ND_PRINT((ndo," doi=%d", doi));
ND_PRINT((ndo," proto=%d", proto));
if (ntohs(n.type) < 8192)
ND_PRINT((ndo," type=%s", NOTIFY_ERROR_STR(ntohs(n.type))));
else if (ntohs(n.type) < 16384)
ND_PRINT((ndo," type=%s", numstr(ntohs(n.type))));
else if (ntohs(n.type) < 24576)
ND_PRINT((ndo," type=%s", NOTIFY_STATUS_STR(ntohs(n.type))));
else
ND_PRINT((ndo," type=%s", numstr(ntohs(n.type))));
if (n.spi_size) {
ND_PRINT((ndo," spi="));
if (!rawprint(ndo, (caddr_t)(p + 1), n.spi_size))
goto trunc;
}
return (u_char *)(p + 1) + n.spi_size;
}
ND_PRINT((ndo," doi=ipsec"));
ND_PRINT((ndo," proto=%s", PROTOIDSTR(proto)));
if (ntohs(n.type) < 8192)
ND_PRINT((ndo," type=%s", NOTIFY_ERROR_STR(ntohs(n.type))));
else if (ntohs(n.type) < 16384)
ND_PRINT((ndo," type=%s", IPSEC_NOTIFY_ERROR_STR(ntohs(n.type))));
else if (ntohs(n.type) < 24576)
ND_PRINT((ndo," type=%s", NOTIFY_STATUS_STR(ntohs(n.type))));
else if (ntohs(n.type) < 32768)
ND_PRINT((ndo," type=%s", IPSEC_NOTIFY_STATUS_STR(ntohs(n.type))));
else
ND_PRINT((ndo," type=%s", numstr(ntohs(n.type))));
if (n.spi_size) {
ND_PRINT((ndo," spi="));
if (!rawprint(ndo, (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) {
ND_PRINT((ndo," 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 = ikev1_attrmap_print(ndo, cp,
(ep < ep2) ? ep : ep2, map, nmap);
}
break;
}
case IPSECDOI_NTYPE_REPLAY_STATUS:
ND_PRINT((ndo,"replay detection %sabled",
(*(u_int32_t *)cp) ? "en" : "dis"));
break;
case ISAKMP_NTYPE_NO_PROPOSAL_CHOSEN:
if (ikev1_sub_print(ndo, ISAKMP_NPTYPE_SA,
(struct isakmp_gen *)cp, ep, phase, doi, proto,
depth) == NULL)
return NULL;
break;
default:
/* NULL is dummy */
isakmp_print(ndo, cp,
item_len - sizeof(*p) - n.spi_size,
NULL);
}
ND_PRINT((ndo,")"));
}
return (u_char *)ext + item_len;
trunc:
ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_N)));
return NULL;
}
static const u_char *
ikev1_d_print(netdissect_options *ndo, u_char tpay _U_,
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 ikev1_pl_d *p;
struct ikev1_pl_d d;
const u_int8_t *q;
u_int32_t doi;
u_int32_t proto;
int i;
ND_PRINT((ndo,"%s:", NPSTR(ISAKMP_NPTYPE_D)));
p = (struct ikev1_pl_d *)ext;
ND_TCHECK(*p);
safememcpy(&d, ext, sizeof(d));
doi = ntohl(d.doi);
proto = d.prot_id;
if (doi != 1) {
ND_PRINT((ndo," doi=%u", doi));
ND_PRINT((ndo," proto=%u", proto));
} else {
ND_PRINT((ndo," doi=ipsec"));
ND_PRINT((ndo," proto=%s", PROTOIDSTR(proto)));
}
ND_PRINT((ndo," spilen=%u", d.spi_size));
ND_PRINT((ndo," nspi=%u", ntohs(d.num_spi)));
ND_PRINT((ndo," spi="));
q = (u_int8_t *)(p + 1);
for (i = 0; i < ntohs(d.num_spi); i++) {
if (i != 0)
ND_PRINT((ndo,","));
if (!rawprint(ndo, (caddr_t)q, d.spi_size))
goto trunc;
q += d.spi_size;
}
return q;
trunc:
ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_D)));
return NULL;
}
static const u_char *
ikev1_vid_print(netdissect_options *ndo, u_char tpay _U_,
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;
ND_PRINT((ndo,"%s:", NPSTR(ISAKMP_NPTYPE_VID)));
ND_TCHECK(*ext);
safememcpy(&e, ext, sizeof(e));
ND_PRINT((ndo," len=%d", ntohs(e.len) - 4));
if (2 < ndo->ndo_vflag && 4 < ntohs(e.len)) {
ND_PRINT((ndo," "));
if (!rawprint(ndo, (caddr_t)(ext + 1), ntohs(e.len) - 4))
goto trunc;
}
return (u_char *)ext + ntohs(e.len);
trunc:
ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_VID)));
return NULL;
}
/************************************************************/
/* */
/* IKE v2 - rfc4306 - dissector */
/* */
/************************************************************/
static void
ikev2_pay_print(netdissect_options *ndo, const char *payname, int critical)
{
ND_PRINT((ndo,"%s%s:", payname, critical&0x80 ? "[C]" : ""));
}
static const u_char *
ikev2_gen_print(netdissect_options *ndo, u_char tpay,
const struct isakmp_gen *ext)
{
struct isakmp_gen e;
ND_TCHECK(*ext);
safememcpy(&e, ext, sizeof(e));
ikev2_pay_print(ndo, NPSTR(tpay), e.critical);
ND_PRINT((ndo," len=%d", ntohs(e.len) - 4));
if (2 < ndo->ndo_vflag && 4 < ntohs(e.len)) {
ND_PRINT((ndo," "));
if (!rawprint(ndo, (caddr_t)(ext + 1), ntohs(e.len) - 4))
goto trunc;
}
return (u_char *)ext + ntohs(e.len);
trunc:
ND_PRINT((ndo," [|%s]", NPSTR(tpay)));
return NULL;
}
static const u_char *
ikev2_t_print(netdissect_options *ndo, u_char tpay _U_, int pcount,
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 _U_, int depth _U_)
{
const struct ikev2_t *p;
struct ikev2_t t;
u_int16_t t_id;
const u_char *cp;
const char *idstr;
const struct attrmap *map;
size_t nmap;
const u_char *ep2;
p = (struct ikev2_t *)ext;
ND_TCHECK(*p);
safememcpy(&t, ext, sizeof(t));
ikev2_pay_print(ndo, NPSTR(ISAKMP_NPTYPE_T), t.h.critical);
t_id = ntohs(t.t_id);
map = NULL;
nmap = 0;
switch (t.t_type) {
case IV2_T_ENCR:
idstr = STR_OR_ID(t_id, esp_p_map);
map = encr_t_map;
nmap = sizeof(encr_t_map)/sizeof(encr_t_map[0]);
break;
case IV2_T_PRF:
idstr = STR_OR_ID(t_id, prf_p_map);
break;
case IV2_T_INTEG:
idstr = STR_OR_ID(t_id, integ_p_map);
break;
case IV2_T_DH:
idstr = STR_OR_ID(t_id, dh_p_map);
break;
case IV2_T_ESN:
idstr = STR_OR_ID(t_id, esn_p_map);
break;
default:
idstr = NULL;
break;
}
if (idstr)
ND_PRINT((ndo," #%u type=%s id=%s ", pcount,
STR_OR_ID(t.t_type, ikev2_t_type_map),
idstr));
else
ND_PRINT((ndo," #%u type=%s id=%u ", pcount,
STR_OR_ID(t.t_type, ikev2_t_type_map),
t.t_id));
cp = (u_char *)(p + 1);
ep2 = (u_char *)p + item_len;
while (cp < ep && cp < ep2) {
if (map && nmap) {
cp = ikev1_attrmap_print(ndo, cp, (ep < ep2) ? ep : ep2,
map, nmap);
} else
cp = ikev1_attr_print(ndo, cp, (ep < ep2) ? ep : ep2);
}
if (ep < ep2)
ND_PRINT((ndo,"..."));
return cp;
trunc:
ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_T)));
return NULL;
}
static const u_char *
ikev2_p_print(netdissect_options *ndo, u_char tpay _U_, int pcount _U_,
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 ikev2_p *p;
struct ikev2_p prop;
const u_char *cp;
p = (struct ikev2_p *)ext;
ND_TCHECK(*p);
safememcpy(&prop, ext, sizeof(prop));
ikev2_pay_print(ndo, NPSTR(ISAKMP_NPTYPE_P), prop.h.critical);
ND_PRINT((ndo," #%u protoid=%s transform=%d len=%u",
prop.p_no, PROTOIDSTR(prop.prot_id),
prop.num_t, ntohs(prop.h.len)));
if (prop.spi_size) {
ND_PRINT((ndo," spi="));
if (!rawprint(ndo, (caddr_t)(p + 1), prop.spi_size))
goto trunc;
}
ext = (struct isakmp_gen *)((u_char *)(p + 1) + prop.spi_size);
ND_TCHECK(*ext);
cp = ikev2_sub_print(ndo, NULL, ISAKMP_NPTYPE_T, ext, ep, phase, doi0,
prop.prot_id, depth);
return cp;
trunc:
ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_P)));
return NULL;
}
static const u_char *
ikev2_sa_print(netdissect_options *ndo, u_char tpay,
const struct isakmp_gen *ext1,
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;
int osa_length, sa_length;
ND_TCHECK(*ext1);
safememcpy(&e, ext1, sizeof(e));
ikev2_pay_print(ndo, "sa", e.critical);
osa_length= ntohs(e.len);
sa_length = osa_length - 4;
ND_PRINT((ndo," len=%d", sa_length));
ikev2_sub_print(ndo, NULL, ISAKMP_NPTYPE_P,
ext1+1, ep,
0, 0, 0, depth);
return (u_char *)ext1 + osa_length;
trunc:
ND_PRINT((ndo," [|%s]", NPSTR(tpay)));
return NULL;
}
static const u_char *
ikev2_ke_print(netdissect_options *ndo, u_char tpay,
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 ikev2_ke ke;
struct ikev2_ke *k;
k = (struct ikev2_ke *)ext;
ND_TCHECK(*ext);
safememcpy(&ke, ext, sizeof(ke));
ikev2_pay_print(ndo, NPSTR(tpay), ke.h.critical);
ND_PRINT((ndo," len=%u group=%s", ntohs(ke.h.len) - 8,
STR_OR_ID(ntohs(ke.ke_group), dh_p_map)));
if (2 < ndo->ndo_vflag && 8 < ntohs(ke.h.len)) {
ND_PRINT((ndo," "));
if (!rawprint(ndo, (caddr_t)(k + 1), ntohs(ke.h.len) - 8))
goto trunc;
}
return (u_char *)ext + ntohs(ke.h.len);
trunc:
ND_PRINT((ndo," [|%s]", NPSTR(tpay)));
return NULL;
}
static const u_char *
ikev2_ID_print(netdissect_options *ndo, u_char tpay,
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 ikev2_id id;
int id_len, idtype_len, i;
unsigned int dumpascii, dumphex;
unsigned char *typedata;
ND_TCHECK(*ext);
safememcpy(&id, ext, sizeof(id));
ikev2_pay_print(ndo, NPSTR(tpay), id.h.critical);
id_len = ntohs(id.h.len);
ND_PRINT((ndo," len=%d", id_len - 4));
if (2 < ndo->ndo_vflag && 4 < id_len) {
ND_PRINT((ndo," "));
if (!rawprint(ndo, (caddr_t)(ext + 1), id_len - 4))
goto trunc;
}
idtype_len =id_len - sizeof(struct ikev2_id);
dumpascii = 0;
dumphex = 0;
typedata = (unsigned char *)(ext)+sizeof(struct ikev2_id);
switch(id.type) {
case ID_IPV4_ADDR:
ND_PRINT((ndo, " ipv4:"));
dumphex=1;
break;
case ID_FQDN:
ND_PRINT((ndo, " fqdn:"));
dumpascii=1;
break;
case ID_RFC822_ADDR:
ND_PRINT((ndo, " rfc822:"));
dumpascii=1;
break;
case ID_IPV6_ADDR:
ND_PRINT((ndo, " ipv6:"));
dumphex=1;
break;
case ID_DER_ASN1_DN:
ND_PRINT((ndo, " dn:"));
dumphex=1;
break;
case ID_DER_ASN1_GN:
ND_PRINT((ndo, " gn:"));
dumphex=1;
break;
case ID_KEY_ID:
ND_PRINT((ndo, " keyid:"));
dumphex=1;
break;
}
if(dumpascii) {
ND_TCHECK2(*typedata, idtype_len);
for(i=0; i<idtype_len; i++) {
if(isprint(typedata[i])) {
ND_PRINT((ndo, "%c", typedata[i]));
} else {
ND_PRINT((ndo, "."));
}
}
}
if(dumphex) {
if (!rawprint(ndo, (caddr_t)typedata, idtype_len))
goto trunc;
}
return (u_char *)ext + id_len;
trunc:
ND_PRINT((ndo," [|%s]", NPSTR(tpay)));
return NULL;
}
static const u_char *
ikev2_cert_print(netdissect_options *ndo, u_char tpay,
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_)
{
return ikev2_gen_print(ndo, tpay, ext);
}
static const u_char *
ikev2_cr_print(netdissect_options *ndo, u_char tpay,
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_)
{
return ikev2_gen_print(ndo, tpay, ext);
}
static const u_char *
ikev2_auth_print(netdissect_options *ndo, u_char tpay,
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 ikev2_auth a;
const char *v2_auth[]={ "invalid", "rsasig",
"shared-secret", "dsssig" };
u_char *authdata = (u_char*)ext + sizeof(a);
unsigned int len;
ND_TCHECK(*ext);
safememcpy(&a, ext, sizeof(a));
ikev2_pay_print(ndo, NPSTR(tpay), a.h.critical);
len = ntohs(a.h.len);
ND_PRINT((ndo," len=%d method=%s", len-4,
STR_OR_ID(a.auth_method, v2_auth)));
if (1 < ndo->ndo_vflag && 4 < len) {
ND_PRINT((ndo," authdata=("));
if (!rawprint(ndo, (caddr_t)authdata, len - sizeof(a)))
goto trunc;
ND_PRINT((ndo,") "));
} else if(ndo->ndo_vflag && 4 < len) {
if(!ike_show_somedata(ndo, authdata, ep)) goto trunc;
}
return (u_char *)ext + len;
trunc:
ND_PRINT((ndo," [|%s]", NPSTR(tpay)));
return NULL;
}
static const u_char *
ikev2_nonce_print(netdissect_options *ndo, u_char tpay,
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;
ND_TCHECK(*ext);
safememcpy(&e, ext, sizeof(e));
ikev2_pay_print(ndo, "nonce", e.critical);
ND_PRINT((ndo," len=%d", ntohs(e.len) - 4));
if (1 < ndo->ndo_vflag && 4 < ntohs(e.len)) {
ND_PRINT((ndo," nonce=("));
if (!rawprint(ndo, (caddr_t)(ext + 1), ntohs(e.len) - 4))
goto trunc;
ND_PRINT((ndo,") "));
} else if(ndo->ndo_vflag && 4 < ntohs(e.len)) {
if(!ike_show_somedata(ndo, (const u_char *)(ext+1), ep)) goto trunc;
}
return (u_char *)ext + ntohs(e.len);
trunc:
ND_PRINT((ndo," [|%s]", NPSTR(tpay)));
return NULL;
}
/* notify payloads */
static const u_char *
ikev2_n_print(netdissect_options *ndo, u_char tpay _U_,
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 ikev2_n *p, n;
const u_char *cp;
u_char *ep2;
u_char showspi, showdata, showsomedata;
const char *notify_name;
u_int32_t type;
p = (struct ikev2_n *)ext;
ND_TCHECK(*p);
safememcpy(&n, ext, sizeof(n));
ikev2_pay_print(ndo, NPSTR(ISAKMP_NPTYPE_N), n.h.critical);
showspi = 1;
showdata = 0;
showsomedata=0;
notify_name=NULL;
ND_PRINT((ndo," prot_id=%s", PROTOIDSTR(n.prot_id)));
type = ntohs(n.type);
/* notify space is annoying sparse */
switch(type) {
case IV2_NOTIFY_UNSUPPORTED_CRITICAL_PAYLOAD:
notify_name = "unsupported_critical_payload";
showspi = 0;
break;
case IV2_NOTIFY_INVALID_IKE_SPI:
notify_name = "invalid_ike_spi";
showspi = 1;
break;
case IV2_NOTIFY_INVALID_MAJOR_VERSION:
notify_name = "invalid_major_version";
showspi = 0;
break;
case IV2_NOTIFY_INVALID_SYNTAX:
notify_name = "invalid_syntax";
showspi = 1;
break;
case IV2_NOTIFY_INVALID_MESSAGE_ID:
notify_name = "invalid_message_id";
showspi = 1;
break;
case IV2_NOTIFY_INVALID_SPI:
notify_name = "invalid_spi";
showspi = 1;
break;
case IV2_NOTIFY_NO_PROPOSAL_CHOSEN:
notify_name = "no_protocol_chosen";
showspi = 1;
break;
case IV2_NOTIFY_INVALID_KE_PAYLOAD:
notify_name = "invalid_ke_payload";
showspi = 1;
break;
case IV2_NOTIFY_AUTHENTICATION_FAILED:
notify_name = "authentication_failed";
showspi = 1;
break;
case IV2_NOTIFY_SINGLE_PAIR_REQUIRED:
notify_name = "single_pair_required";
showspi = 1;
break;
case IV2_NOTIFY_NO_ADDITIONAL_SAS:
notify_name = "no_additional_sas";
showspi = 0;
break;
case IV2_NOTIFY_INTERNAL_ADDRESS_FAILURE:
notify_name = "internal_address_failure";
showspi = 0;
break;
case IV2_NOTIFY_FAILED_CP_REQUIRED:
notify_name = "failed:cp_required";
showspi = 0;
break;
case IV2_NOTIFY_INVALID_SELECTORS:
notify_name = "invalid_selectors";
showspi = 0;
break;
case IV2_NOTIFY_INITIAL_CONTACT:
notify_name = "initial_contact";
showspi = 0;
break;
case IV2_NOTIFY_SET_WINDOW_SIZE:
notify_name = "set_window_size";
showspi = 0;
break;
case IV2_NOTIFY_ADDITIONAL_TS_POSSIBLE:
notify_name = "additional_ts_possible";
showspi = 0;
break;
case IV2_NOTIFY_IPCOMP_SUPPORTED:
notify_name = "ipcomp_supported";
showspi = 0;
break;
case IV2_NOTIFY_NAT_DETECTION_SOURCE_IP:
notify_name = "nat_detection_source_ip";
showspi = 1;
break;
case IV2_NOTIFY_NAT_DETECTION_DESTINATION_IP:
notify_name = "nat_detection_destination_ip";
showspi = 1;
break;
case IV2_NOTIFY_COOKIE:
notify_name = "cookie";
showspi = 1;
showsomedata= 1;
showdata= 0;
break;
case IV2_NOTIFY_USE_TRANSPORT_MODE:
notify_name = "use_transport_mode";
showspi = 0;
break;
case IV2_NOTIFY_HTTP_CERT_LOOKUP_SUPPORTED:
notify_name = "http_cert_lookup_supported";
showspi = 0;
break;
case IV2_NOTIFY_REKEY_SA:
notify_name = "rekey_sa";
showspi = 1;
break;
case IV2_NOTIFY_ESP_TFC_PADDING_NOT_SUPPORTED:
notify_name = "tfc_padding_not_supported";
showspi = 0;
break;
case IV2_NOTIFY_NON_FIRST_FRAGMENTS_ALSO:
notify_name = "non_first_fragment_also";
showspi = 0;
break;
default:
if (type < 8192) {
notify_name="error";
} else if(type < 16384) {
notify_name="private-error";
} else if(type < 40960) {
notify_name="status";
} else {
notify_name="private-status";
}
}
if(notify_name) {
ND_PRINT((ndo," type=%u(%s)", type, notify_name));
}
if (showspi && n.spi_size) {
ND_PRINT((ndo," spi="));
if (!rawprint(ndo, (caddr_t)(p + 1), n.spi_size))
goto trunc;
}
cp = (u_char *)(p + 1) + n.spi_size;
ep2 = (u_char *)p + item_len;
if(3 < ndo->ndo_vflag) {
showdata = 1;
}
if ((showdata || (showsomedata && ep-cp < 30)) && cp < ep) {
ND_PRINT((ndo," data=("));
if (!rawprint(ndo, (caddr_t)(cp), ep - cp))
goto trunc;
ND_PRINT((ndo,")"));
} else if(showsomedata && cp < ep) {
if(!ike_show_somedata(ndo, cp, ep)) goto trunc;
}
return (u_char *)ext + item_len;
trunc:
ND_PRINT((ndo," [|%s]", NPSTR(ISAKMP_NPTYPE_N)));
return NULL;
}
static const u_char *
ikev2_d_print(netdissect_options *ndo, u_char tpay,
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_)
{
return ikev2_gen_print(ndo, tpay, ext);
}
static const u_char *
ikev2_vid_print(netdissect_options *ndo, u_char tpay,
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;
const u_char *vid;
int i, len;
ND_TCHECK(*ext);
safememcpy(&e, ext, sizeof(e));
ikev2_pay_print(ndo, NPSTR(tpay), e.critical);
ND_PRINT((ndo," len=%d vid=", ntohs(e.len) - 4));
vid = (const u_char *)(ext+1);
len = ntohs(e.len) - 4;
ND_TCHECK2(*vid, len);
for(i=0; i<len; i++) {
if(isprint(vid[i])) ND_PRINT((ndo, "%c", vid[i]));
else ND_PRINT((ndo, "."));
}
if (2 < ndo->ndo_vflag && 4 < len) {
ND_PRINT((ndo," "));
if (!rawprint(ndo, (caddr_t)(ext + 1), ntohs(e.len) - 4))
goto trunc;
}
return (u_char *)ext + ntohs(e.len);
trunc:
ND_PRINT((ndo," [|%s]", NPSTR(tpay)));
return NULL;
}
static const u_char *
ikev2_TS_print(netdissect_options *ndo, u_char tpay,
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_)
{
return ikev2_gen_print(ndo, tpay, ext);
}
static const u_char *
ikev2_e_print(netdissect_options *ndo,
#ifndef HAVE_LIBCRYPTO
_U_
#endif
struct isakmp *base,
u_char tpay,
const struct isakmp_gen *ext,
u_int item_len _U_, const u_char *ep _U_,
#ifndef HAVE_LIBCRYPTO
_U_
#endif
u_int32_t phase,
#ifndef HAVE_LIBCRYPTO
_U_
#endif
u_int32_t doi,
#ifndef HAVE_LIBCRYPTO
_U_
#endif
u_int32_t proto,
#ifndef HAVE_LIBCRYPTO
_U_
#endif
int depth)
{
struct isakmp_gen e;
u_char *dat;
volatile int dlen;
ND_TCHECK(*ext);
safememcpy(&e, ext, sizeof(e));
ikev2_pay_print(ndo, NPSTR(tpay), e.critical);
dlen = ntohs(e.len)-4;
ND_PRINT((ndo," len=%d", dlen));
if (2 < ndo->ndo_vflag && 4 < dlen) {
ND_PRINT((ndo," "));
if (!rawprint(ndo, (caddr_t)(ext + 1), dlen))
goto trunc;
}
dat = (u_char *)(ext+1);
ND_TCHECK2(*dat, dlen);
#ifdef HAVE_LIBCRYPTO
/* try to decypt it! */
if(esp_print_decrypt_buffer_by_ikev2(ndo,
base->flags & ISAKMP_FLAG_I,
base->i_ck, base->r_ck,
dat, dat+dlen)) {
ext = (const struct isakmp_gen *)ndo->ndo_packetp;
/* got it decrypted, print stuff inside. */
ikev2_sub_print(ndo, base, e.np, ext, ndo->ndo_snapend,
phase, doi, proto, depth+1);
}
#endif
/* always return NULL, because E must be at end, and NP refers
* to what was inside.
*/
return NULL;
trunc:
ND_PRINT((ndo," [|%s]", NPSTR(tpay)));
return NULL;
}
static const u_char *
ikev2_cp_print(netdissect_options *ndo, u_char tpay,
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_)
{
return ikev2_gen_print(ndo, tpay, ext);
}
static const u_char *
ikev2_eap_print(netdissect_options *ndo, u_char tpay,
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_)
{
return ikev2_gen_print(ndo, tpay, ext);
}
static const u_char *
ike_sub0_print(netdissect_options *ndo,
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;
ND_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])(ndo, np, ext, item_len, ep, phase, doi, proto, depth);
} else {
ND_PRINT((ndo,"%s", NPSTR(np)));
cp += item_len;
}
return cp;
trunc:
ND_PRINT((ndo," [|isakmp]"));
return NULL;
}
static const u_char *
ikev1_sub_print(netdissect_options *ndo,
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) {
ND_TCHECK(*ext);
safememcpy(&e, ext, sizeof(e));
ND_TCHECK2(*ext, ntohs(e.len));
depth++;
ND_PRINT((ndo,"\n"));
for (i = 0; i < depth; i++)
ND_PRINT((ndo," "));
ND_PRINT((ndo,"("));
cp = ike_sub0_print(ndo, np, ext, ep, phase, doi, proto, depth);
ND_PRINT((ndo,")"));
depth--;
if (cp == NULL) {
/* Zero-length subitem */
return NULL;
}
np = e.np;
ext = (struct isakmp_gen *)cp;
}
return cp;
trunc:
ND_PRINT((ndo," [|%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);
}
static void
ikev1_print(netdissect_options *ndo,
const u_char *bp, u_int length,
const u_char *bp2, struct isakmp *base)
{
const struct isakmp *p;
const u_char *ep;
u_char np;
int i;
int phase;
p = (const struct isakmp *)bp;
ep = ndo->ndo_snapend;
phase = (*(u_int32_t *)base->msgid == 0) ? 1 : 2;
if (phase == 1)
ND_PRINT((ndo," phase %d", phase));
else
ND_PRINT((ndo," 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 */
ND_PRINT((ndo," I"));
if (bp2)
cookie_record(&base->i_ck, bp2);
} else
ND_PRINT((ndo," ?"));
} else {
if (bp2 && cookie_isinitiator(i, bp2))
ND_PRINT((ndo," I"));
else if (bp2 && cookie_isresponder(i, bp2))
ND_PRINT((ndo," R"));
else
ND_PRINT((ndo," ?"));
}
ND_PRINT((ndo," %s", ETYPESTR(base->etype)));
if (base->flags) {
ND_PRINT((ndo,"[%s%s]", base->flags & ISAKMP_FLAG_E ? "E" : "",
base->flags & ISAKMP_FLAG_C ? "C" : ""));
}
if (ndo->ndo_vflag) {
const struct isakmp_gen *ext;
int nparen;
ND_PRINT((ndo,":"));
/* 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...
*/
ND_PRINT((ndo," [encrypted %s]", NPSTR(base->np)));
goto done;
}
nparen = 0;
CHECKLEN(p + 1, base->np);
np = base->np;
ext = (struct isakmp_gen *)(p + 1);
ikev1_sub_print(ndo, np, ext, ep, phase, 0, 0, 0);
}
done:
if (ndo->ndo_vflag) {
if (ntohl(base->len) != length) {
ND_PRINT((ndo," (len mismatch: isakmp %u/ip %u)",
(u_int32_t)ntohl(base->len), length));
}
}
}
static const u_char *
ikev2_sub0_print(netdissect_options *ndo, struct isakmp *base,
u_char np, int pcount,
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;
ND_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(np == ISAKMP_NPTYPE_P) {
cp = ikev2_p_print(ndo, np, pcount, ext, item_len,
ep, phase, doi, proto, depth);
} else if(np == ISAKMP_NPTYPE_T) {
cp = ikev2_t_print(ndo, np, pcount, ext, item_len,
ep, phase, doi, proto, depth);
} else if(np == ISAKMP_NPTYPE_v2E) {
cp = ikev2_e_print(ndo, base, np, ext, item_len,
ep, phase, doi, proto, depth);
} else if (NPFUNC(np)) {
/*
* XXX - what if item_len is too short, or too long,
* for this payload type?
*/
cp = (*npfunc[np])(ndo, np, /*pcount,*/ ext, item_len,
ep, phase, doi, proto, depth);
} else {
ND_PRINT((ndo,"%s", NPSTR(np)));
cp += item_len;
}
return cp;
trunc:
ND_PRINT((ndo," [|isakmp]"));
return NULL;
}
static const u_char *
ikev2_sub_print(netdissect_options *ndo,
struct isakmp *base,
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;
int pcount;
struct isakmp_gen e;
cp = (const u_char *)ext;
pcount = 0;
while (np) {
pcount++;
ND_TCHECK(*ext);
safememcpy(&e, ext, sizeof(e));
ND_TCHECK2(*ext, ntohs(e.len));
depth++;
ND_PRINT((ndo,"\n"));
for (i = 0; i < depth; i++)
ND_PRINT((ndo," "));
ND_PRINT((ndo,"("));
cp = ikev2_sub0_print(ndo, base, np, pcount,
ext, ep, phase, doi, proto, depth);
ND_PRINT((ndo,")"));
depth--;
if (cp == NULL) {
/* Zero-length subitem */
return NULL;
}
np = e.np;
ext = (struct isakmp_gen *)cp;
}
return cp;
trunc:
ND_PRINT((ndo," [|%s]", NPSTR(np)));
return NULL;
}
static void
ikev2_print(netdissect_options *ndo,
const u_char *bp, u_int length,
const u_char *bp2 _U_, struct isakmp *base)
{
const struct isakmp *p;
const u_char *ep;
u_char np;
int phase;
p = (const struct isakmp *)bp;
ep = ndo->ndo_snapend;
phase = (*(u_int32_t *)base->msgid == 0) ? 1 : 2;
if (phase == 1)
ND_PRINT((ndo, " parent_sa"));
else
ND_PRINT((ndo, " child_sa "));
ND_PRINT((ndo, " %s", ETYPESTR(base->etype)));
if (base->flags) {
ND_PRINT((ndo, "[%s%s%s]",
base->flags & ISAKMP_FLAG_I ? "I" : "",
base->flags & ISAKMP_FLAG_V ? "V" : "",
base->flags & ISAKMP_FLAG_R ? "R" : ""));
}
if (ndo->ndo_vflag) {
const struct isakmp_gen *ext;
int nparen;
ND_PRINT((ndo, ":"));
/* 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...
*/
ND_PRINT((ndo, " [encrypted %s]", NPSTR(base->np)));
goto done;
}
nparen = 0;
CHECKLEN(p + 1, base->np)
np = base->np;
ext = (struct isakmp_gen *)(p + 1);
ikev2_sub_print(ndo, base, np, ext, ep, phase, 0, 0, 0);
}
done:
if (ndo->ndo_vflag) {
if (ntohl(base->len) != length) {
ND_PRINT((ndo, " (len mismatch: isakmp %u/ip %u)",
(u_int32_t)ntohl(base->len), length));
}
}
}
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;
int major, minor;
#ifdef HAVE_LIBCRYPTO
/* initialize SAs */
if (ndo->ndo_sa_list_head == NULL) {
if (ndo->ndo_espsecret)
esp_print_decodesecret(ndo);
}
#endif
p = (const struct isakmp *)bp;
ep = ndo->ndo_snapend;
if ((struct isakmp *)ep < p + 1) {
ND_PRINT((ndo,"[|isakmp]"));
return;
}
safememcpy(&base, p, sizeof(base));
ND_PRINT((ndo,"isakmp"));
major = (base.vers & ISAKMP_VERS_MAJOR)
>> ISAKMP_VERS_MAJOR_SHIFT;
minor = (base.vers & ISAKMP_VERS_MINOR)
>> ISAKMP_VERS_MINOR_SHIFT;
if (ndo->ndo_vflag) {
ND_PRINT((ndo," %d.%d", major, minor));
}
if (ndo->ndo_vflag) {
ND_PRINT((ndo," msgid "));
hexprint(ndo, (caddr_t)&base.msgid, sizeof(base.msgid));
}
if (1 < ndo->ndo_vflag) {
ND_PRINT((ndo," cookie "));
hexprint(ndo, (caddr_t)&base.i_ck, sizeof(base.i_ck));
ND_PRINT((ndo,"->"));
hexprint(ndo, (caddr_t)&base.r_ck, sizeof(base.r_ck));
}
ND_PRINT((ndo,":"));
switch(major) {
case IKEv1_MAJOR_VERSION:
ikev1_print(ndo, bp, length, bp2, &base);
break;
case IKEv2_MAJOR_VERSION:
ikev2_print(ndo, bp, length, bp2, &base);
break;
}
}
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:
ND_PRINT((ndo,"[|isakmp]"));
return;
}
/*
* Local Variables:
* c-style: whitesmith
* c-basic-offset: 8
* End:
*/
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