#include <sys/types.h>
#include <sys/param.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <netinet/in.h>
#if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# if HAVE_SYS_TIME_H
# include <sys/time.h>
# else
# include <time.h>
# endif
#endif
#include "var.h"
#include "misc.h"
#include "vmbuf.h"
#include "plog.h"
#include "sockmisc.h"
#include "schedule.h"
#include "debug.h"
#include "localconf.h"
#include "remoteconf.h"
#include "isakmp_var.h"
#include "isakmp.h"
#include "oakley.h"
#include "handler.h"
#include "ipsec_doi.h"
#include "crypto_openssl.h"
#include "pfkey.h"
#include "isakmp_ident.h"
#include "isakmp_inf.h"
#include "isakmp_natd.h"
#include "vendorid.h"
#ifdef HAVE_GSSAPI
#include "gssapi.h"
#endif
static vchar_t *ident_ir2mx __P((struct ph1handle *));
static vchar_t *ident_ir3mx __P((struct ph1handle *));
int
ident_i1send(iph1, msg)
struct ph1handle *iph1;
vchar_t *msg;
{
struct isakmp_gen *gen;
caddr_t p;
int tlen;
int error = -1;
vchar_t *vid = NULL;
if (msg != NULL) {
plog(LLV_ERROR, LOCATION, NULL,
"msg has to be NULL in this function.\n");
goto end;
}
if (iph1->status != PHASE1ST_START) {
plog(LLV_ERROR, LOCATION, NULL,
"status mismatched %d.\n", iph1->status);
goto end;
}
memset(&iph1->index, 0, sizeof(iph1->index));
isakmp_newcookie((caddr_t)&iph1->index, iph1->remote, iph1->local);
iph1->sa = ipsecdoi_setph1proposal(iph1->rmconf->proposal);
if (iph1->sa == NULL)
goto end;
tlen = sizeof(struct isakmp)
+ sizeof(*gen) + iph1->sa->l;
#ifdef IKE_NAT_T
vid = set_vendorid(VENDORID_NATT);
if (vid) tlen += sizeof(*gen) + vid->l;
#endif
iph1->sendbuf = vmalloc(tlen);
if (iph1->sendbuf == NULL) {
plog(LLV_ERROR, LOCATION, NULL,
"failed to get buffer to send.\n");
goto end;
}
p = set_isakmp_header(iph1->sendbuf, iph1, ISAKMP_NPTYPE_SA);
if (p == NULL)
goto end;
p = set_isakmp_payload(p, iph1->sa, vid ? ISAKMP_NPTYPE_VID : ISAKMP_NPTYPE_NONE);
if (vid) {
p = set_isakmp_payload(p, vid, ISAKMP_NPTYPE_NONE);
vfree(vid);
}
#ifdef HAVE_PRINT_ISAKMP_C
isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0);
#endif
iph1->retry_counter = iph1->rmconf->retry_counter;
if (isakmp_ph1resend(iph1) == -1)
goto end;
iph1->status = PHASE1ST_MSG1SENT;
error = 0;
end:
return error;
}
int
ident_i2recv(iph1, msg)
struct ph1handle *iph1;
vchar_t *msg;
{
vchar_t *pbuf = NULL;
struct isakmp_parse_t *pa;
vchar_t *satmp = NULL;
int error = -1;
if (iph1->status != PHASE1ST_MSG1SENT) {
plog(LLV_ERROR, LOCATION, NULL,
"status mismatched %d.\n", iph1->status);
goto end;
}
pbuf = isakmp_parse(msg);
if (pbuf == NULL)
goto end;
pa = (struct isakmp_parse_t *)pbuf->v;
if (pa->type != ISAKMP_NPTYPE_SA) {
plog(LLV_ERROR, LOCATION, iph1->remote,
"received invalid next payload type %d, "
"expecting %d.\n",
pa->type, ISAKMP_NPTYPE_SA);
goto end;
}
if (isakmp_p2ph(&satmp, pa->ptr) < 0)
goto end;
pa++;
for (;
pa->type != ISAKMP_NPTYPE_NONE;
pa++) {
switch (pa->type) {
case ISAKMP_NPTYPE_VID:
if (check_vendorid(pa->ptr) == VENDORID_NATT)
{
#ifdef IKE_NAT_T
iph1->natt_flags |= natt_remote_support;
#endif
}
break;
default:
plog(LLV_ERROR, LOCATION, iph1->remote,
"ignore the packet, "
"received unexpecting payload type %d.\n",
pa->type);
goto end;
}
}
if (ipsecdoi_checkph1proposal(satmp, iph1) < 0) {
plog(LLV_ERROR, LOCATION, iph1->remote,
"failed to get valid proposal.\n");
goto end;
}
if (iph1->sa_ret) {
vfree(iph1->sa_ret);
iph1->sa_ret = NULL;
}
iph1->status = PHASE1ST_MSG2RECEIVED;
error = 0;
end:
if (pbuf)
vfree(pbuf);
if (satmp)
vfree(satmp);
return error;
}
int
ident_i2send(iph1, msg)
struct ph1handle *iph1;
vchar_t *msg;
{
int error = -1;
if (iph1->status != PHASE1ST_MSG2RECEIVED) {
plog(LLV_ERROR, LOCATION, NULL,
"status mismatched %d.\n", iph1->status);
goto end;
}
memcpy(&iph1->index.r_ck, &((struct isakmp *)msg->v)->r_ck,
sizeof(cookie_t));
if (oakley_dh_generate(iph1->approval->dhgrp,
&iph1->dhpub, &iph1->dhpriv) < 0)
goto end;
iph1->nonce = eay_set_random(iph1->rmconf->nonce_size);
if (iph1->nonce == NULL)
goto end;
#ifdef HAVE_GSSAPI
if (iph1->approval->authmethod == OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB &&
gssapi_get_itoken(iph1, NULL) < 0)
goto end;
#endif
iph1->sendbuf = ident_ir2mx(iph1);
if (iph1->sendbuf == NULL)
goto end;
#ifdef HAVE_PRINT_ISAKMP_C
isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0);
#endif
iph1->retry_counter = iph1->rmconf->retry_counter;
if (isakmp_ph1resend(iph1) == -1)
goto end;
if (add_recvdpkt(iph1->remote, iph1->local, iph1->sendbuf, msg) == -1) {
plog(LLV_ERROR , LOCATION, NULL,
"failed to add a response packet to the tree.\n");
goto end;
}
iph1->status = PHASE1ST_MSG2SENT;
error = 0;
end:
return error;
}
int
ident_i3recv(iph1, msg)
struct ph1handle *iph1;
vchar_t *msg;
{
vchar_t *pbuf = NULL;
struct isakmp_parse_t *pa;
int error = -1;
#ifdef HAVE_GSSAPI
vchar_t *gsstoken = NULL;
#endif
if (iph1->status != PHASE1ST_MSG2SENT) {
plog(LLV_ERROR, LOCATION, NULL,
"status mismatched %d.\n", iph1->status);
goto end;
}
pbuf = isakmp_parse(msg);
if (pbuf == NULL)
goto end;
for (pa = (struct isakmp_parse_t *)pbuf->v;
pa->type != ISAKMP_NPTYPE_NONE;
pa++) {
switch (pa->type) {
case ISAKMP_NPTYPE_KE:
if (isakmp_p2ph(&iph1->dhpub_p, pa->ptr) < 0)
goto end;
break;
case ISAKMP_NPTYPE_NONCE:
if (isakmp_p2ph(&iph1->nonce_p, pa->ptr) < 0)
goto end;
break;
case ISAKMP_NPTYPE_VID:
(void)check_vendorid(pa->ptr);
break;
#ifdef HAVE_SIGNING_C
case ISAKMP_NPTYPE_CR:
if (oakley_savecr(iph1, pa->ptr) < 0)
goto end;
break;
#endif
#ifdef HAVE_GSSAPI
case ISAKMP_NPTYPE_GSS:
if (isakmp_p2ph(&gsstoken, pa->ptr) < 0)
goto end;
gssapi_save_received_token(iph1, gsstoken);
break;
#endif
case ISAKMP_NPTYPE_NATD:
#ifdef IKE_NAT_T
{
natd_match_t match = natd_matches(iph1, pa->ptr);
iph1->natt_flags |= natt_natd_received;
if ((match & natd_match_local) != 0)
iph1->natt_flags |= natt_no_local_nat;
if ((match & natd_match_remote) != 0)
iph1->natt_flags |= natt_no_remote_nat;
}
#endif
break;
default:
plog(LLV_ERROR, LOCATION, iph1->remote,
"ignore the packet, "
"received unexpecting payload type %d.\n",
pa->type);
goto end;
}
}
#ifdef IKE_NAT_T
if (natd_hasnat(iph1))
{
if (iph1->remote->sa_family == AF_INET)
{
struct sockaddr_in *sin = (struct sockaddr_in*)iph1->remote;
plog(LLV_INFO, LOCATION, NULL,
"detected NAT, switching to port %d for %s",
PORT_ISAKMP_NATT, saddr2str(iph1->remote));
sin->sin_port = htons(PORT_ISAKMP_NATT);
sin = (struct sockaddr_in*)iph1->local;
sin->sin_port = htons(PORT_ISAKMP_NATT);
}
}
#endif
if (iph1->dhpub_p == NULL || iph1->nonce_p == NULL) {
plog(LLV_ERROR, LOCATION, iph1->remote,
"few isakmp message received.\n");
goto end;
}
#ifdef HAVE_SIGNING_C
if (oakley_checkcr(iph1) < 0) {
;
}
#endif
iph1->status = PHASE1ST_MSG3RECEIVED;
error = 0;
end:
if (pbuf)
vfree(pbuf);
if (error) {
VPTRINIT(iph1->dhpub_p);
VPTRINIT(iph1->nonce_p);
VPTRINIT(iph1->id_p);
oakley_delcert(iph1->cr_p);
iph1->cr_p = NULL;
}
return error;
}
int
ident_i3send(iph1, msg0)
struct ph1handle *iph1;
vchar_t *msg0;
{
int error = -1;
int dohash = 1;
#ifdef HAVE_GSSAPI
int len;
#endif
if (iph1->status != PHASE1ST_MSG3RECEIVED) {
plog(LLV_ERROR, LOCATION, NULL,
"status mismatched %d.\n", iph1->status);
goto end;
}
if (oakley_dh_compute(iph1->approval->dhgrp, iph1->dhpub,
iph1->dhpriv, iph1->dhpub_p, &iph1->dhgxy) < 0)
goto end;
if (oakley_skeyid(iph1) < 0)
goto end;
if (oakley_skeyid_dae(iph1) < 0)
goto end;
if (oakley_compute_enckey(iph1) < 0)
goto end;
if (oakley_newiv(iph1) < 0)
goto end;
if (ipsecdoi_setid1(iph1) < 0)
goto end;
#ifdef HAVE_GSSAPI
if (iph1->approval->authmethod == OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB &&
gssapi_more_tokens(iph1)) {
plog(LLV_DEBUG, LOCATION, NULL, "calling get_itoken\n");
if (gssapi_get_itoken(iph1, &len) < 0)
goto end;
if (len != 0)
dohash = 0;
}
#endif
if (dohash) {
iph1->hash = oakley_ph1hash_common(iph1, GENERATE);
if (iph1->hash == NULL)
goto end;
} else
iph1->hash = NULL;
iph1->flags |= ISAKMP_FLAG_E;
iph1->sendbuf = ident_ir3mx(iph1);
if (iph1->sendbuf == NULL)
goto end;
iph1->retry_counter = iph1->rmconf->retry_counter;
if (isakmp_ph1resend(iph1) == -1)
goto end;
if (add_recvdpkt(iph1->remote, iph1->local, iph1->sendbuf, msg0) == -1) {
plog(LLV_ERROR , LOCATION, NULL,
"failed to add a response packet to the tree.\n");
goto end;
}
memcpy(iph1->ivm->ive->v, iph1->ivm->iv->v, iph1->ivm->iv->l);
iph1->status = PHASE1ST_MSG3SENT;
error = 0;
end:
return error;
}
int
ident_i4recv(iph1, msg0)
struct ph1handle *iph1;
vchar_t *msg0;
{
vchar_t *pbuf = NULL;
struct isakmp_parse_t *pa;
vchar_t *msg = NULL;
int error = -1;
int type;
#ifdef HAVE_GSSAPI
vchar_t *gsstoken = NULL;
#endif
if (iph1->status != PHASE1ST_MSG3SENT) {
plog(LLV_ERROR, LOCATION, NULL,
"status mismatched %d.\n", iph1->status);
goto end;
}
if (!ISSET(((struct isakmp *)msg0->v)->flags, ISAKMP_FLAG_E)) {
plog(LLV_ERROR, LOCATION, iph1->remote,
"ignore the packet, "
"expecting the packet encrypted.\n");
goto end;
}
msg = oakley_do_decrypt(iph1, msg0, iph1->ivm->iv, iph1->ivm->ive);
if (msg == NULL)
goto end;
pbuf = isakmp_parse(msg);
if (pbuf == NULL)
goto end;
iph1->pl_hash = NULL;
for (pa = (struct isakmp_parse_t *)pbuf->v;
pa->type != ISAKMP_NPTYPE_NONE;
pa++) {
switch (pa->type) {
case ISAKMP_NPTYPE_ID:
if (isakmp_p2ph(&iph1->id_p, pa->ptr) < 0)
goto end;
break;
case ISAKMP_NPTYPE_HASH:
iph1->pl_hash = (struct isakmp_pl_hash *)pa->ptr;
break;
#ifdef HAVE_SIGNING_C
case ISAKMP_NPTYPE_CERT:
if (oakley_savecert(iph1, pa->ptr) < 0)
goto end;
break;
case ISAKMP_NPTYPE_SIG:
if (isakmp_p2ph(&iph1->sig_p, pa->ptr) < 0)
goto end;
break;
#endif
#ifdef HAVE_GSSAPI
case ISAKMP_NPTYPE_GSS:
if (isakmp_p2ph(&gsstoken, pa->ptr) < 0)
goto end;
gssapi_save_received_token(iph1, gsstoken);
break;
#endif
case ISAKMP_NPTYPE_VID:
(void)check_vendorid(pa->ptr);
break;
case ISAKMP_NPTYPE_N:
isakmp_check_notify(pa->ptr, iph1);
break;
default:
plog(LLV_ERROR, LOCATION, iph1->remote,
"ignore the packet, "
"received unexpecting payload type %d.\n",
pa->type);
goto end;
}
}
memcpy(iph1->ivm->iv->v, iph1->ivm->ive->v, iph1->ivm->ive->l);
if (ipsecdoi_checkid1(iph1) != 0) {
plog(LLV_ERROR, LOCATION, iph1->remote,
"invalid ID payload.\n");
goto end;
}
#ifdef HAVE_GSSAPI
if (gsstoken == NULL) {
#endif
type = oakley_validate_auth(iph1);
if (type != 0) {
if (type == -1) {
goto end;
}
isakmp_info_send_n1(iph1, type, NULL);
goto end;
}
#ifdef HAVE_GSSAPI
}
#endif
plog(LLV_DEBUG, LOCATION, iph1->remote, "peer's ID:");
plogdump(LLV_DEBUG, iph1->id_p->v, iph1->id_p->l);
#ifdef HAVE_GSSAPI
iph1->status = gsstoken != 0 ? PHASE1ST_MSG3RECEIVED :
PHASE1ST_MSG4RECEIVED;
#else
iph1->status = PHASE1ST_MSG4RECEIVED;
#endif
error = 0;
end:
if (pbuf)
vfree(pbuf);
if (msg)
vfree(msg);
#ifdef HAVE_GSSAPI
if (gsstoken)
vfree(gsstoken);
#endif
if (error) {
VPTRINIT(iph1->id_p);
oakley_delcert(iph1->cert_p);
iph1->cert_p = NULL;
oakley_delcert(iph1->crl_p);
iph1->crl_p = NULL;
VPTRINIT(iph1->sig_p);
}
return error;
}
int
ident_i4send(iph1, msg)
struct ph1handle *iph1;
vchar_t *msg;
{
int error = -1;
if (iph1->status != PHASE1ST_MSG4RECEIVED) {
plog(LLV_ERROR, LOCATION, NULL,
"status mismatched %d.\n", iph1->status);
goto end;
}
memcpy(iph1->ivm->iv->v, iph1->ivm->ive->v, iph1->ivm->iv->l);
iph1->status = PHASE1ST_ESTABLISHED;
error = 0;
end:
return error;
}
int
ident_r1recv(iph1, msg)
struct ph1handle *iph1;
vchar_t *msg;
{
vchar_t *pbuf = NULL;
struct isakmp_parse_t *pa;
int error = -1;
if (iph1->status != PHASE1ST_START) {
plog(LLV_ERROR, LOCATION, NULL,
"status mismatched %d.\n", iph1->status);
goto end;
}
pbuf = isakmp_parse(msg);
if (pbuf == NULL)
goto end;
pa = (struct isakmp_parse_t *)pbuf->v;
if (pa->type != ISAKMP_NPTYPE_SA) {
plog(LLV_ERROR, LOCATION, iph1->remote,
"received invalid next payload type %d, "
"expecting %d.\n",
pa->type, ISAKMP_NPTYPE_SA);
goto end;
}
if (isakmp_p2ph(&iph1->sa, pa->ptr) < 0)
goto end;
pa++;
for (;
pa->type != ISAKMP_NPTYPE_NONE;
pa++) {
switch (pa->type) {
case ISAKMP_NPTYPE_VID:
if (check_vendorid(pa->ptr) == VENDORID_NATT)
{
iph1->natt_flags |= natt_remote_support;
}
break;
default:
plog(LLV_ERROR, LOCATION, iph1->remote,
"ignore the packet, "
"received unexpecting payload type %d.\n",
pa->type);
goto end;
}
}
if (ipsecdoi_checkph1proposal(iph1->sa, iph1) < 0) {
plog(LLV_ERROR, LOCATION, iph1->remote,
"failed to get valid proposal.\n");
goto end;
}
iph1->status = PHASE1ST_MSG1RECEIVED;
error = 0;
end:
if (pbuf)
vfree(pbuf);
if (error) {
VPTRINIT(iph1->sa);
}
return error;
}
int
ident_r1send(iph1, msg)
struct ph1handle *iph1;
vchar_t *msg;
{
struct isakmp_gen *gen;
caddr_t p;
int tlen;
int error = -1;
vchar_t *gss_sa = NULL;
vchar_t *vid = NULL;
#ifdef IKE_NAT_T
vchar_t *nattvid = NULL;
#endif
if (iph1->status != PHASE1ST_MSG1RECEIVED) {
plog(LLV_ERROR, LOCATION, NULL,
"status mismatched %d.\n", iph1->status);
goto end;
}
isakmp_newcookie((caddr_t)&iph1->index.r_ck, iph1->remote, iph1->local);
#ifdef HAVE_GSSAPI
if (iph1->approval->gssid != NULL)
gss_sa = ipsecdoi_setph1proposal(iph1->approval);
else
#endif
gss_sa = iph1->sa_ret;
tlen = sizeof(struct isakmp)
+ sizeof(*gen) + gss_sa->l;
if ((vid = set_vendorid(iph1->approval->vendorid)) != NULL)
tlen += sizeof(*gen) + vid->l;
#ifdef IKE_NAT_T
if ((nattvid = set_vendorid(VENDORID_NATT)) != NULL)
{
tlen += sizeof(*gen) + nattvid->l;
}
#endif
iph1->sendbuf = vmalloc(tlen);
if (iph1->sendbuf == NULL) {
plog(LLV_ERROR, LOCATION, NULL,
"failed to get buffer to send.\n");
goto end;
}
p = set_isakmp_header(iph1->sendbuf, iph1, ISAKMP_NPTYPE_SA);
if (p == NULL)
goto end;
p = set_isakmp_payload(p, gss_sa,
(vid || nattvid) ? ISAKMP_NPTYPE_VID
: ISAKMP_NPTYPE_NONE);
if (vid)
p = set_isakmp_payload(p, vid, nattvid ? ISAKMP_NPTYPE_VID
: ISAKMP_NPTYPE_NONE);
if (nattvid)
p = set_isakmp_payload(p, nattvid, ISAKMP_NPTYPE_NONE);
#ifdef HAVE_PRINT_ISAKMP_C
isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0);
#endif
iph1->retry_counter = iph1->rmconf->retry_counter;
if (isakmp_ph1resend(iph1) == -1)
goto end;
if (add_recvdpkt(iph1->remote, iph1->local, iph1->sendbuf, msg) == -1) {
plog(LLV_ERROR , LOCATION, NULL,
"failed to add a response packet to the tree.\n");
goto end;
}
iph1->status = PHASE1ST_MSG1SENT;
error = 0;
end:
#ifdef HAVE_GSSAPI
if (gss_sa != iph1->sa_ret)
vfree(gss_sa);
#endif
if (vid)
vfree(vid);
if (nattvid)
vfree(nattvid);
return error;
}
int
ident_r2recv(iph1, msg)
struct ph1handle *iph1;
vchar_t *msg;
{
vchar_t *pbuf = NULL;
struct isakmp_parse_t *pa;
int error = -1;
#ifdef HAVE_GSSAPI
vchar_t *gsstoken = NULL;
#endif
if (iph1->status != PHASE1ST_MSG1SENT) {
plog(LLV_ERROR, LOCATION, NULL,
"status mismatched %d.\n", iph1->status);
goto end;
}
pbuf = isakmp_parse(msg);
if (pbuf == NULL)
goto end;
for (pa = (struct isakmp_parse_t *)pbuf->v;
pa->type != ISAKMP_NPTYPE_NONE;
pa++) {
switch (pa->type) {
case ISAKMP_NPTYPE_KE:
if (isakmp_p2ph(&iph1->dhpub_p, pa->ptr) < 0)
goto end;
break;
case ISAKMP_NPTYPE_NONCE:
if (isakmp_p2ph(&iph1->nonce_p, pa->ptr) < 0)
goto end;
break;
case ISAKMP_NPTYPE_VID:
(void)check_vendorid(pa->ptr);
break;
case ISAKMP_NPTYPE_CR:
plog(LLV_WARNING, LOCATION, iph1->remote,
"CR received, ignore it. "
"It should be in other exchange.\n");
break;
#ifdef HAVE_GSSAPI
case ISAKMP_NPTYPE_GSS:
if (isakmp_p2ph(&gsstoken, pa->ptr) < 0)
goto end;
gssapi_save_received_token(iph1, gsstoken);
break;
#endif
case ISAKMP_NPTYPE_NATD:
#ifdef IKE_NAT_T
{
natd_match_t match = natd_matches(iph1, pa->ptr);
iph1->natt_flags |= natt_natd_received;
if ((match & natd_match_local) != 0)
iph1->natt_flags |= natt_no_local_nat;
if ((match & natd_match_remote) != 0)
iph1->natt_flags |= natt_no_remote_nat;
}
#endif
break;
default:
plog(LLV_ERROR, LOCATION, iph1->remote,
"ignore the packet, "
"received unexpecting payload type %d.\n",
pa->type);
goto end;
}
}
if (iph1->dhpub_p == NULL || iph1->nonce_p == NULL) {
plog(LLV_ERROR, LOCATION, iph1->remote,
"few isakmp message received.\n");
goto end;
}
iph1->status = PHASE1ST_MSG2RECEIVED;
error = 0;
end:
if (pbuf)
vfree(pbuf);
#ifdef HAVE_GSSAPI
if (gsstoken)
vfree(gsstoken);
#endif
if (error) {
VPTRINIT(iph1->dhpub_p);
VPTRINIT(iph1->nonce_p);
VPTRINIT(iph1->id_p);
}
return error;
}
int
ident_r2send(iph1, msg)
struct ph1handle *iph1;
vchar_t *msg;
{
int error = -1;
if (iph1->status != PHASE1ST_MSG2RECEIVED) {
plog(LLV_ERROR, LOCATION, NULL,
"status mismatched %d.\n", iph1->status);
goto end;
}
if (oakley_dh_generate(iph1->approval->dhgrp,
&iph1->dhpub, &iph1->dhpriv) < 0)
goto end;
iph1->nonce = eay_set_random(iph1->rmconf->nonce_size);
if (iph1->nonce == NULL)
goto end;
#ifdef HAVE_GSSAPI
if (iph1->approval->authmethod == OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB)
gssapi_get_rtoken(iph1, NULL);
#endif
iph1->sendbuf = ident_ir2mx(iph1);
if (iph1->sendbuf == NULL)
goto end;
#ifdef HAVE_PRINT_ISAKMP_C
isakmp_printpacket(iph1->sendbuf, iph1->local, iph1->remote, 0);
#endif
iph1->retry_counter = iph1->rmconf->retry_counter;
if (isakmp_ph1resend(iph1) == -1)
goto end;
if (add_recvdpkt(iph1->remote, iph1->local, iph1->sendbuf, msg) == -1) {
plog(LLV_ERROR , LOCATION, NULL,
"failed to add a response packet to the tree.\n");
goto end;
}
if (oakley_dh_compute(iph1->approval->dhgrp, iph1->dhpub,
iph1->dhpriv, iph1->dhpub_p, &iph1->dhgxy) < 0)
goto end;
if (oakley_skeyid(iph1) < 0)
goto end;
if (oakley_skeyid_dae(iph1) < 0)
goto end;
if (oakley_compute_enckey(iph1) < 0)
goto end;
if (oakley_newiv(iph1) < 0)
goto end;
iph1->status = PHASE1ST_MSG2SENT;
error = 0;
end:
return error;
}
int
ident_r3recv(iph1, msg0)
struct ph1handle *iph1;
vchar_t *msg0;
{
vchar_t *msg = NULL;
vchar_t *pbuf = NULL;
struct isakmp_parse_t *pa;
int error = -1;
int type;
#ifdef HAVE_GSSAPI
vchar_t *gsstoken = NULL;
#endif
if (iph1->status != PHASE1ST_MSG2SENT) {
plog(LLV_ERROR, LOCATION, NULL,
"status mismatched %d.\n", iph1->status);
goto end;
}
if (!ISSET(((struct isakmp *)msg0->v)->flags, ISAKMP_FLAG_E)) {
plog(LLV_ERROR, LOCATION, iph1->remote,
"reject the packet, "
"expecting the packet encrypted.\n");
goto end;
}
msg = oakley_do_decrypt(iph1, msg0, iph1->ivm->iv, iph1->ivm->ive);
if (msg == NULL)
goto end;
pbuf = isakmp_parse(msg);
if (pbuf == NULL)
goto end;
iph1->pl_hash = NULL;
for (pa = (struct isakmp_parse_t *)pbuf->v;
pa->type != ISAKMP_NPTYPE_NONE;
pa++) {
switch (pa->type) {
case ISAKMP_NPTYPE_ID:
if (isakmp_p2ph(&iph1->id_p, pa->ptr) < 0)
goto end;
break;
case ISAKMP_NPTYPE_HASH:
iph1->pl_hash = (struct isakmp_pl_hash *)pa->ptr;
break;
#ifdef HAVE_SIGNING_C
case ISAKMP_NPTYPE_CR:
if (oakley_savecr(iph1, pa->ptr) < 0)
goto end;
break;
case ISAKMP_NPTYPE_CERT:
if (oakley_savecert(iph1, pa->ptr) < 0)
goto end;
break;
case ISAKMP_NPTYPE_SIG:
if (isakmp_p2ph(&iph1->sig_p, pa->ptr) < 0)
goto end;
break;
#endif
#ifdef HAVE_GSSAPI
case ISAKMP_NPTYPE_GSS:
if (isakmp_p2ph(&gsstoken, pa->ptr) < 0)
goto end;
gssapi_save_received_token(iph1, gsstoken);
break;
#endif
case ISAKMP_NPTYPE_VID:
(void)check_vendorid(pa->ptr);
break;
case ISAKMP_NPTYPE_N:
isakmp_check_notify(pa->ptr, iph1);
break;
default:
plog(LLV_ERROR, LOCATION, iph1->remote,
"ignore the packet, "
"received unexpecting payload type %d.\n",
pa->type);
goto end;
}
}
{
int ng = 0;
switch (iph1->approval->authmethod) {
case OAKLEY_ATTR_AUTH_METHOD_PSKEY:
if (iph1->id_p == NULL || iph1->pl_hash == NULL)
ng++;
break;
case OAKLEY_ATTR_AUTH_METHOD_DSSSIG:
case OAKLEY_ATTR_AUTH_METHOD_RSASIG:
if (iph1->id_p == NULL || iph1->sig_p == NULL)
ng++;
break;
case OAKLEY_ATTR_AUTH_METHOD_RSAENC:
case OAKLEY_ATTR_AUTH_METHOD_RSAREV:
if (iph1->pl_hash == NULL)
ng++;
break;
#ifdef HAVE_GSSAPI
case OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB:
if (gsstoken == NULL && iph1->pl_hash == NULL)
ng++;
break;
#endif
default:
plog(LLV_ERROR, LOCATION, iph1->remote,
"invalid authmethod %d why ?\n",
iph1->approval->authmethod);
goto end;
}
if (ng) {
plog(LLV_ERROR, LOCATION, iph1->remote,
"few isakmp message received.\n");
goto end;
}
}
memcpy(iph1->ivm->iv->v, iph1->ivm->ive->v, iph1->ivm->ive->l);
if (ipsecdoi_checkid1(iph1) != 0) {
plog(LLV_ERROR, LOCATION, iph1->remote,
"invalid ID payload.\n");
goto end;
}
#ifdef HAVE_GSSAPI
if (gsstoken == NULL) {
#endif
type = oakley_validate_auth(iph1);
if (type != 0) {
if (type == -1) {
goto end;
}
isakmp_info_send_n1(iph1, type, NULL);
goto end;
}
#ifdef HAVE_GSSAPI
}
#endif
#ifdef HAVE_SIGNING_C
if (oakley_checkcr(iph1) < 0) {
;
}
#endif
plog(LLV_DEBUG, LOCATION, iph1->remote, "peer's ID\n");
plogdump(LLV_DEBUG, iph1->id_p->v, iph1->id_p->l);
#ifdef HAVE_GSSAPI
iph1->status = gsstoken != NULL ? PHASE1ST_MSG2RECEIVED :
PHASE1ST_MSG3RECEIVED;
#else
iph1->status = PHASE1ST_MSG3RECEIVED;
#endif
error = 0;
end:
if (pbuf)
vfree(pbuf);
if (msg)
vfree(msg);
#ifdef HAVE_GSSAPI
if (gsstoken)
vfree(gsstoken);
#endif
if (error) {
VPTRINIT(iph1->id_p);
oakley_delcert(iph1->cert_p);
iph1->cert_p = NULL;
oakley_delcert(iph1->crl_p);
iph1->crl_p = NULL;
VPTRINIT(iph1->sig_p);
oakley_delcert(iph1->cr_p);
iph1->cr_p = NULL;
}
return error;
}
int
ident_r3send(iph1, msg)
struct ph1handle *iph1;
vchar_t *msg;
{
int error = -1;
int dohash = 1;
#ifdef HAVE_GSSAPI
int len;
#endif
if (iph1->status != PHASE1ST_MSG3RECEIVED) {
plog(LLV_ERROR, LOCATION, NULL,
"status mismatched %d.\n", iph1->status);
goto end;
}
if (ipsecdoi_setid1(iph1) < 0)
goto end;
#ifdef HAVE_GSSAPI
if (iph1->approval->authmethod == OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB &&
gssapi_more_tokens(iph1)) {
gssapi_get_rtoken(iph1, &len);
if (len != 0)
dohash = 0;
}
#endif
if (dohash) {
plog(LLV_DEBUG, LOCATION, NULL, "generate HASH_R\n");
iph1->hash = oakley_ph1hash_common(iph1, GENERATE);
if (iph1->hash == NULL)
goto end;
} else
iph1->hash = NULL;
iph1->flags |= ISAKMP_FLAG_E;
iph1->sendbuf = ident_ir3mx(iph1);
if (iph1->sendbuf == NULL)
goto end;
if (isakmp_send(iph1, iph1->sendbuf) < 0)
goto end;
if (add_recvdpkt(iph1->remote, iph1->local, iph1->sendbuf, msg) == -1) {
plog(LLV_ERROR , LOCATION, NULL,
"failed to add a response packet to the tree.\n");
goto end;
}
memcpy(iph1->ivm->ive->v, iph1->ivm->iv->v, iph1->ivm->iv->l);
iph1->status = PHASE1ST_ESTABLISHED;
error = 0;
end:
return error;
}
static vchar_t *
ident_ir2mx(iph1)
struct ph1handle *iph1;
{
vchar_t *buf = 0;
struct isakmp_gen *gen;
char *p;
int tlen;
int need_cr = 0;
vchar_t *cr = NULL;
vchar_t *vid = NULL;
int error = -1;
int nptype;
#ifdef HAVE_GSSAPI
vchar_t *gsstoken = NULL;
#endif
int need_natd = 0;
#ifdef HAVE_SIGNING_C
if (iph1->side == RESPONDER
&& iph1->rmconf->send_cr
&& oakley_needcr(iph1->approval->authmethod)
&& iph1->rmconf->peerscertfile == NULL) {
need_cr = 1;
cr = oakley_getcr(iph1);
if (cr == NULL) {
plog(LLV_ERROR, LOCATION, NULL,
"failed to get cr buffer.\n");
goto end;
}
}
#endif
#ifdef HAVE_GSSAPI
if (iph1->approval->authmethod == OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB)
gssapi_get_token_to_send(iph1, &gsstoken);
#endif
tlen = sizeof(struct isakmp)
+ sizeof(*gen) + iph1->dhpub->l
+ sizeof(*gen) + iph1->nonce->l;
if ((vid = set_vendorid(iph1->approval->vendorid)) != NULL)
tlen += sizeof(*gen) + vid->l;
if (need_cr)
tlen += sizeof(*gen) + cr->l;
#ifdef HAVE_GSSAPI
if (gsstoken)
tlen += sizeof(*gen) + gsstoken->l;
#endif
#ifdef IKE_NAT_T
if ((iph1->natt_flags & natt_remote_support) != 0) {
need_natd = 1;
natd_create(iph1);
if (iph1->local_natd)
tlen += sizeof(*gen) + iph1->local_natd->l;
if (iph1->remote_natd)
tlen += sizeof(*gen) + iph1->remote_natd->l;
}
#endif
buf = vmalloc(tlen);
if (buf == NULL) {
plog(LLV_ERROR, LOCATION, NULL,
"failed to get buffer to send.\n");
goto end;
}
p = set_isakmp_header(buf, iph1, ISAKMP_NPTYPE_KE);
if (p == NULL)
goto end;
p = set_isakmp_payload(p, iph1->dhpub, ISAKMP_NPTYPE_NONCE);
#ifdef HAVE_GSSAPI
if (iph1->approval->authmethod == OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB)
nptype = ISAKMP_NPTYPE_GSS;
else
#endif
nptype = vid ? ISAKMP_NPTYPE_VID :
(need_cr ? ISAKMP_NPTYPE_CR :
(need_natd ? ISAKMP_NPTYPE_NATD : ISAKMP_NPTYPE_NONE));
p = set_isakmp_payload(p, iph1->nonce, nptype);
#ifdef HAVE_GSSAPI
if (iph1->approval->authmethod == OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB) {
p = set_isakmp_payload(p, gsstoken,
vid ? ISAKMP_NPTYPE_VID
: (need_cr ? ISAKMP_NPTYPE_CR
: (need_natd ? ISAKMP_NPTYPE_NATD : ISAKMP_NPTYPE_NONE)));
}
#endif
if (vid)
p = set_isakmp_payload(p, vid,
need_cr ? ISAKMP_NPTYPE_CR
: (need_natd ? ISAKMP_NPTYPE_NATD : ISAKMP_NPTYPE_NONE));
if (need_cr)
p = set_isakmp_payload(p, cr, need_natd ? ISAKMP_NPTYPE_NATD : ISAKMP_NPTYPE_NONE);
#ifdef IKE_NAT_T
if (need_natd) {
if (iph1->local_natd)
p = set_isakmp_payload(p, iph1->local_natd, ISAKMP_NPTYPE_NATD);
if (iph1->remote_natd)
p = set_isakmp_payload(p, iph1->remote_natd, ISAKMP_NPTYPE_NONE);
}
#endif
error = 0;
end:
if (error && buf != NULL) {
vfree(buf);
buf = NULL;
}
if (cr)
vfree(cr);
#ifdef HAVE_GSSAPI
if (gsstoken)
vfree(gsstoken);
#endif
if (vid)
vfree(vid);
return buf;
}
static vchar_t *
ident_ir3mx(iph1)
struct ph1handle *iph1;
{
vchar_t *buf = NULL, *new = NULL;
char *p;
int tlen;
struct isakmp_gen *gen;
int need_cr = 0;
int need_cert = 0;
vchar_t *cr = NULL;
int error = -1;
#ifdef HAVE_GSSAPI
int nptype;
vchar_t *gsstoken = NULL;
vchar_t *gsshash = NULL;
#endif
tlen = sizeof(struct isakmp);
switch (iph1->approval->authmethod) {
case OAKLEY_ATTR_AUTH_METHOD_PSKEY:
tlen += sizeof(*gen) + iph1->id->l
+ sizeof(*gen) + iph1->hash->l;
buf = vmalloc(tlen);
if (buf == NULL) {
plog(LLV_ERROR, LOCATION, NULL,
"failed to get buffer to send.\n");
goto end;
}
p = set_isakmp_header(buf, iph1, ISAKMP_NPTYPE_ID);
if (p == NULL)
goto end;
p = set_isakmp_payload(p, iph1->id, ISAKMP_NPTYPE_HASH);
p = set_isakmp_payload(p, iph1->hash, ISAKMP_NPTYPE_NONE);
break;
#ifdef HAVE_SIGNING_C
case OAKLEY_ATTR_AUTH_METHOD_DSSSIG:
case OAKLEY_ATTR_AUTH_METHOD_RSASIG:
if (oakley_getmycert(iph1) < 0)
goto end;
if (oakley_getsign(iph1) < 0)
goto end;
if (iph1->side == INITIATOR
&& iph1->rmconf->send_cr
&& oakley_needcr(iph1->approval->authmethod)
&& iph1->rmconf->peerscertfile == NULL) {
need_cr = 1;
cr = oakley_getcr(iph1);
if (cr == NULL) {
plog(LLV_ERROR, LOCATION, NULL,
"failed to get cr buffer.\n");
goto end;
}
}
if (iph1->cert != NULL && iph1->rmconf->send_cert)
need_cert = 1;
tlen += sizeof(*gen) + iph1->id->l
+ sizeof(*gen) + iph1->sig->l;
if (need_cert)
tlen += sizeof(*gen) + iph1->cert->pl->l;
if (need_cr)
tlen += sizeof(*gen) + cr->l;
buf = vmalloc(tlen);
if (buf == NULL) {
plog(LLV_ERROR, LOCATION, NULL,
"failed to get buffer to send.\n");
goto end;
}
p = set_isakmp_header(buf, iph1, ISAKMP_NPTYPE_ID);
if (p == NULL)
goto end;
p = set_isakmp_payload(p, iph1->id, need_cert
? ISAKMP_NPTYPE_CERT
: ISAKMP_NPTYPE_SIG);
if (need_cert)
p = set_isakmp_payload(p, iph1->cert->pl, ISAKMP_NPTYPE_SIG);
p = set_isakmp_payload(p, iph1->sig,
need_cr ? ISAKMP_NPTYPE_CR : ISAKMP_NPTYPE_NONE);
if (need_cr)
p = set_isakmp_payload(p, cr, ISAKMP_NPTYPE_NONE);
break;
#endif
#ifdef HAVE_GSSAPI
case OAKLEY_ATTR_AUTH_METHOD_GSSAPI_KRB:
if (!gssapi_id_sent(iph1))
tlen += sizeof (*gen) + iph1->id->l;
if (iph1->hash != NULL) {
gsshash = gssapi_wraphash(iph1);
if (gsshash == NULL)
goto end;
tlen += sizeof (*gen) + gsshash->l;
} else {
gssapi_get_token_to_send(iph1, &gsstoken);
tlen += sizeof (*gen) + gsstoken->l;
}
buf = vmalloc(tlen);
if (buf == NULL) {
plog(LLV_ERROR, LOCATION, NULL,
"failed to get buffer to send.\n");
goto end;
}
if (!gssapi_id_sent(iph1))
nptype = ISAKMP_NPTYPE_ID;
else
nptype = iph1->hash != NULL ? ISAKMP_NPTYPE_HASH :
ISAKMP_NPTYPE_GSS;
p = set_isakmp_header(buf, iph1, nptype);
if (p == NULL)
goto end;
if (!gssapi_id_sent(iph1)) {
nptype = iph1->hash != NULL ? ISAKMP_NPTYPE_HASH :
ISAKMP_NPTYPE_GSS;
p = set_isakmp_payload(p, iph1->id, nptype);
if (p == NULL)
goto end;
gssapi_set_id_sent(iph1);
}
if (iph1->hash != NULL)
p = set_isakmp_payload(p, gsshash,
ISAKMP_NPTYPE_NONE);
else
p = set_isakmp_payload(p, gsstoken, ISAKMP_NPTYPE_NONE);
break;
#endif
case OAKLEY_ATTR_AUTH_METHOD_RSAENC:
case OAKLEY_ATTR_AUTH_METHOD_RSAREV:
plog(LLV_ERROR, LOCATION, NULL,
"not supported authentication type %d\n",
iph1->approval->authmethod);
goto end;
default:
plog(LLV_ERROR, LOCATION, NULL,
"invalid authentication type %d\n",
iph1->approval->authmethod);
goto end;
}
#ifdef HAVE_PRINT_ISAKMP_C
isakmp_printpacket(buf, iph1->local, iph1->remote, 1);
#endif
new = oakley_do_encrypt(iph1, buf, iph1->ivm->ive, iph1->ivm->iv);
if (new == NULL)
goto end;
vfree(buf);
buf = new;
error = 0;
end:
if (cr)
vfree(cr);
if (error && buf != NULL) {
vfree(buf);
buf = NULL;
}
return buf;
}