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/* $OpenBSD: pfkeyv2.c,v 1.260 2024/01/11 14:15:11 bluhm Exp $ */
/*
* @(#)COPYRIGHT 1.1 (NRL) 17 January 1995
*
* NRL grants permission for redistribution and use in source and binary
* forms, with or without modification, of the software and documentation
* created at NRL 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgements:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* This product includes software developed at the Information
* Technology Division, US Naval Research Laboratory.
* 4. Neither the name of the NRL nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THE SOFTWARE PROVIDED BY NRL IS PROVIDED BY NRL 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 NRL 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.
*
* The views and conclusions contained in the software and documentation
* are those of the authors and should not be interpreted as representing
* official policies, either expressed or implied, of the US Naval
* Research Laboratory (NRL).
*/
/*
* Copyright (c) 1995, 1996, 1997, 1998, 1999 Craig Metz. 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 author nor the names of any contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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 "pf.h"
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/protosw.h>
#include <sys/domain.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/pool.h>
#include <sys/mutex.h>
#include <net/route.h>
#include <netinet/ip_ipsp.h>
#include <net/pfkeyv2.h>
#include <net/radix.h>
#include <netinet/ip_ah.h>
#include <netinet/ip_esp.h>
#include <netinet/ip_ipcomp.h>
#include <crypto/blf.h>
#if NPF > 0
#include <net/if.h>
#include <net/pfvar.h>
#endif
#define PFKEYSNDQ 8192
#define PFKEYRCVQ 8192
static const struct sadb_alg ealgs[] = {
{ SADB_EALG_NULL, 0, 0, 0 },
{ SADB_EALG_3DESCBC, 64, 192, 192 },
{ SADB_X_EALG_BLF, 64, 40, BLF_MAXKEYLEN * 8},
{ SADB_X_EALG_CAST, 64, 40, 128},
{ SADB_X_EALG_AES, 128, 128, 256},
{ SADB_X_EALG_AESCTR, 128, 128 + 32, 256 + 32}
};
static const struct sadb_alg aalgs[] = {
{ SADB_AALG_SHA1HMAC, 0, 160, 160 },
{ SADB_AALG_MD5HMAC, 0, 128, 128 },
{ SADB_X_AALG_RIPEMD160HMAC, 0, 160, 160 },
{ SADB_X_AALG_SHA2_256, 0, 256, 256 },
{ SADB_X_AALG_SHA2_384, 0, 384, 384 },
{ SADB_X_AALG_SHA2_512, 0, 512, 512 }
};
static const struct sadb_alg calgs[] = {
{ SADB_X_CALG_DEFLATE, 0, 0, 0}
};
struct pool pkpcb_pool;
#define PFKEY_MSG_MAXSZ 4096
const struct sockaddr pfkey_addr = { 2, PF_KEY, };
const struct domain pfkeydomain;
/*
* pfkey PCB
*
* Locks used to protect struct members in this file:
* I immutable after creation
* a atomic operations
* l pkptable's lock
* s socket lock
*/
struct pkpcb {
struct socket *kcb_socket; /* [I] associated socket */
SRPL_ENTRY(pkpcb) kcb_list; /* [l] */
struct refcnt kcb_refcnt; /* [a] */
int kcb_flags; /* [s] */
uint32_t kcb_reg; /* [s] Inc if SATYPE_MAX > 31 */
uint32_t kcb_pid; /* [I] */
unsigned int kcb_rdomain; /* [I] routing domain */
};
#define sotokeycb(so) ((struct pkpcb *)(so)->so_pcb)
#define keylock(kp) solock((kp)->kcb_socket)
#define keyunlock(kp) sounlock((kp)->kcb_socket)
struct dump_state {
struct sadb_msg *sadb_msg;
struct socket *socket;
};
struct pkptable {
SRPL_HEAD(, pkpcb) pkp_list;
struct srpl_rc pkp_rc;
struct rwlock pkp_lk;
};
struct pkptable pkptable;
struct mutex pfkeyv2_mtx = MUTEX_INITIALIZER(IPL_MPFLOOR);
static uint32_t pfkeyv2_seq = 1;
static int nregistered = 0;
static int npromisc = 0;
void pfkey_init(void);
int pfkeyv2_attach(struct socket *, int, int);
int pfkeyv2_detach(struct socket *);
int pfkeyv2_disconnect(struct socket *);
int pfkeyv2_shutdown(struct socket *);
int pfkeyv2_send(struct socket *, struct mbuf *, struct mbuf *,
struct mbuf *);
int pfkeyv2_sockaddr(struct socket *, struct mbuf *);
int pfkeyv2_peeraddr(struct socket *, struct mbuf *);
int pfkeyv2_output(struct mbuf *, struct socket *);
int pfkey_sendup(struct pkpcb *, struct mbuf *, int);
int pfkeyv2_sa_flush(struct tdb *, void *, int);
int pfkeyv2_policy_flush(struct ipsec_policy *, void *, unsigned int);
int pfkeyv2_sysctl_policydumper(struct ipsec_policy *, void *, unsigned int);
void keycb_ref(void *, void *);
void keycb_unref(void *, void *);
/*
* Wrapper around m_devget(); copy data from contiguous buffer to mbuf
* chain.
*/
int
pfdatatopacket(void *data, int len, struct mbuf **packet)
{
if (!(*packet = m_devget(data, len, 0)))
return (ENOMEM);
/* Make sure, all data gets zeroized on free */
(*packet)->m_flags |= M_ZEROIZE;
return (0);
}
const struct pr_usrreqs pfkeyv2_usrreqs = {
.pru_attach = pfkeyv2_attach,
.pru_detach = pfkeyv2_detach,
.pru_disconnect = pfkeyv2_disconnect,
.pru_shutdown = pfkeyv2_shutdown,
.pru_send = pfkeyv2_send,
.pru_sockaddr = pfkeyv2_sockaddr,
.pru_peeraddr = pfkeyv2_peeraddr,
};
const struct protosw pfkeysw[] = {
{
.pr_type = SOCK_RAW,
.pr_domain = &pfkeydomain,
.pr_protocol = PF_KEY_V2,
.pr_flags = PR_ATOMIC | PR_ADDR,
.pr_usrreqs = &pfkeyv2_usrreqs,
.pr_sysctl = pfkeyv2_sysctl,
}
};
const struct domain pfkeydomain = {
.dom_family = PF_KEY,
.dom_name = "pfkey",
.dom_init = pfkey_init,
.dom_protosw = pfkeysw,
.dom_protoswNPROTOSW = &pfkeysw[nitems(pfkeysw)],
};
void
keycb_ref(void *null, void *v)
{
struct pkpcb *kp = v;
refcnt_take(&kp->kcb_refcnt);
}
void
keycb_unref(void *null, void *v)
{
struct pkpcb *kp = v;
refcnt_rele_wake(&kp->kcb_refcnt);
}
void
pfkey_init(void)
{
rn_init(sizeof(struct sockaddr_encap));
srpl_rc_init(&pkptable.pkp_rc, keycb_ref, keycb_unref, NULL);
rw_init(&pkptable.pkp_lk, "pfkey");
SRPL_INIT(&pkptable.pkp_list);
pool_init(&pkpcb_pool, sizeof(struct pkpcb), 0,
IPL_SOFTNET, PR_WAITOK, "pkpcb", NULL);
pool_init(&ipsec_policy_pool, sizeof(struct ipsec_policy), 0,
IPL_SOFTNET, 0, "ipsec policy", NULL);
pool_init(&ipsec_acquire_pool, sizeof(struct ipsec_acquire), 0,
IPL_SOFTNET, 0, "ipsec acquire", NULL);
}
/*
* Attach a new PF_KEYv2 socket.
*/
int
pfkeyv2_attach(struct socket *so, int proto, int wait)
{
struct pkpcb *kp;
int error;
if ((so->so_state & SS_PRIV) == 0)
return EACCES;
error = soreserve(so, PFKEYSNDQ, PFKEYRCVQ);
if (error)
return (error);
kp = pool_get(&pkpcb_pool, (wait == M_WAIT ? PR_WAITOK : PR_NOWAIT) |
PR_ZERO);
if (kp == NULL)
return (ENOBUFS);
so->so_pcb = kp;
refcnt_init(&kp->kcb_refcnt);
kp->kcb_socket = so;
kp->kcb_pid = curproc->p_p->ps_pid;
kp->kcb_rdomain = rtable_l2(curproc->p_p->ps_rtableid);
so->so_options |= SO_USELOOPBACK;
soisconnected(so);
rw_enter(&pkptable.pkp_lk, RW_WRITE);
SRPL_INSERT_HEAD_LOCKED(&pkptable.pkp_rc, &pkptable.pkp_list, kp, kcb_list);
rw_exit(&pkptable.pkp_lk);
return (0);
}
/*
* Close a PF_KEYv2 socket.
*/
int
pfkeyv2_detach(struct socket *so)
{
struct pkpcb *kp;
soassertlocked(so);
kp = sotokeycb(so);
if (kp == NULL)
return ENOTCONN;
if (kp->kcb_flags &
(PFKEYV2_SOCKETFLAGS_REGISTERED|PFKEYV2_SOCKETFLAGS_PROMISC)) {
mtx_enter(&pfkeyv2_mtx);
if (kp->kcb_flags & PFKEYV2_SOCKETFLAGS_REGISTERED)
nregistered--;
if (kp->kcb_flags & PFKEYV2_SOCKETFLAGS_PROMISC)
npromisc--;
mtx_leave(&pfkeyv2_mtx);
}
rw_enter(&pkptable.pkp_lk, RW_WRITE);
SRPL_REMOVE_LOCKED(&pkptable.pkp_rc, &pkptable.pkp_list, kp, pkpcb,
kcb_list);
rw_exit(&pkptable.pkp_lk);
sounlock(so);
/* wait for all references to drop */
refcnt_finalize(&kp->kcb_refcnt, "pfkeyrefs");
solock(so);
so->so_pcb = NULL;
KASSERT((so->so_state & SS_NOFDREF) == 0);
pool_put(&pkpcb_pool, kp);
return (0);
}
int
pfkeyv2_disconnect(struct socket *so)
{
soisdisconnected(so);
return (0);
}
int
pfkeyv2_shutdown(struct socket *so)
{
socantsendmore(so);
return (0);
}
int
pfkeyv2_send(struct socket *so, struct mbuf *m, struct mbuf *nam,
struct mbuf *control)
{
int error;
soassertlocked(so);
if (control && control->m_len) {
error = EOPNOTSUPP;
goto out;
}
if (nam) {
error = EISCONN;
goto out;
}
error = pfkeyv2_output(m, so);
m = NULL;
out:
m_freem(control);
m_freem(m);
return (error);
}
int
pfkeyv2_sockaddr(struct socket *so, struct mbuf *nam)
{
return (EINVAL);
}
int
pfkeyv2_peeraddr(struct socket *so, struct mbuf *nam)
{
/* minimal support, just implement a fake peer address */
bcopy(&pfkey_addr, mtod(nam, caddr_t), pfkey_addr.sa_len);
nam->m_len = pfkey_addr.sa_len;
return (0);
}
int
pfkeyv2_output(struct mbuf *mbuf, struct socket *so)
{
void *message;
int error = 0;
#ifdef DIAGNOSTIC
if (!mbuf || !(mbuf->m_flags & M_PKTHDR)) {
error = EINVAL;
goto ret;
}
#endif /* DIAGNOSTIC */
if (mbuf->m_pkthdr.len > PFKEY_MSG_MAXSZ) {
error = EMSGSIZE;
goto ret;
}
if (!(message = malloc((unsigned long) mbuf->m_pkthdr.len,
M_PFKEY, M_DONTWAIT))) {
error = ENOMEM;
goto ret;
}
m_copydata(mbuf, 0, mbuf->m_pkthdr.len, message);
/*
* The socket can't be closed concurrently because the file
* descriptor reference is still held.
*/
sounlock(so);
error = pfkeyv2_dosend(so, message, mbuf->m_pkthdr.len);
solock(so);
ret:
m_freem(mbuf);
return (error);
}
int
pfkey_sendup(struct pkpcb *kp, struct mbuf *m0, int more)
{
struct socket *so = kp->kcb_socket;
struct mbuf *m;
soassertlocked(so);
if (more) {
if (!(m = m_dup_pkt(m0, 0, M_DONTWAIT)))
return (ENOMEM);
} else
m = m0;
if (!sbappendaddr(so, &so->so_rcv, &pfkey_addr, m, NULL)) {
m_freem(m);
return (ENOBUFS);
}
sorwakeup(so);
return (0);
}
/*
* Send a PFKEYv2 message, possibly to many receivers, based on the
* satype of the socket (which is set by the REGISTER message), and the
* third argument.
*/
int
pfkeyv2_sendmessage(void **headers, int mode, struct socket *so,
u_int8_t satype, int count, u_int rdomain)
{
int i, j, rval;
void *p, *buffer = NULL;
struct mbuf *packet;
struct pkpcb *kp;
struct sadb_msg *smsg;
struct srp_ref sr;
/* Find out how much space we'll need... */
j = sizeof(struct sadb_msg);
for (i = 1; i <= SADB_EXT_MAX; i++)
if (headers[i])
j += ((struct sadb_ext *)headers[i])->sadb_ext_len *
sizeof(uint64_t);
/* ...and allocate it */
if (!(buffer = malloc(j + sizeof(struct sadb_msg), M_PFKEY,
M_NOWAIT))) {
rval = ENOMEM;
goto ret;
}
p = buffer + sizeof(struct sadb_msg);
bcopy(headers[0], p, sizeof(struct sadb_msg));
((struct sadb_msg *) p)->sadb_msg_len = j / sizeof(uint64_t);
p += sizeof(struct sadb_msg);
/* Copy payloads in the packet */
for (i = 1; i <= SADB_EXT_MAX; i++)
if (headers[i]) {
((struct sadb_ext *) headers[i])->sadb_ext_type = i;
bcopy(headers[i], p, EXTLEN(headers[i]));
p += EXTLEN(headers[i]);
}
if ((rval = pfdatatopacket(buffer + sizeof(struct sadb_msg),
j, &packet)) != 0)
goto ret;
switch (mode) {
case PFKEYV2_SENDMESSAGE_UNICAST:
/*
* Send message to the specified socket, plus all
* promiscuous listeners.
*/
solock(so);
pfkey_sendup(sotokeycb(so), packet, 0);
sounlock(so);
/*
* Promiscuous messages contain the original message
* encapsulated in another sadb_msg header.
*/
bzero(buffer, sizeof(struct sadb_msg));
smsg = (struct sadb_msg *) buffer;
smsg->sadb_msg_version = PF_KEY_V2;
smsg->sadb_msg_type = SADB_X_PROMISC;
smsg->sadb_msg_len = (sizeof(struct sadb_msg) + j) /
sizeof(uint64_t);
smsg->sadb_msg_seq = 0;
/* Copy to mbuf chain */
if ((rval = pfdatatopacket(buffer, sizeof(struct sadb_msg) + j,
&packet)) != 0)
goto ret;
/*
* Search for promiscuous listeners, skipping the
* original destination.
*/
SRPL_FOREACH(kp, &sr, &pkptable.pkp_list, kcb_list) {
if (kp->kcb_socket == so || kp->kcb_rdomain != rdomain)
continue;
keylock(kp);
if (kp->kcb_flags & PFKEYV2_SOCKETFLAGS_PROMISC)
pfkey_sendup(kp, packet, 1);
keyunlock(kp);
}
SRPL_LEAVE(&sr);
m_freem(packet);
break;
case PFKEYV2_SENDMESSAGE_REGISTERED:
/*
* Send the message to all registered sockets that match
* the specified satype (e.g., all IPSEC-ESP negotiators)
*/
SRPL_FOREACH(kp, &sr, &pkptable.pkp_list, kcb_list) {
if (kp->kcb_rdomain != rdomain)
continue;
keylock(kp);
if (kp->kcb_flags & PFKEYV2_SOCKETFLAGS_REGISTERED) {
if (!satype) {
/* Just send to everyone registered */
pfkey_sendup(kp, packet, 1);
} else {
/* Check for specified satype */
if ((1 << satype) & kp->kcb_reg)
pfkey_sendup(kp, packet, 1);
}
}
keyunlock(kp);
}
SRPL_LEAVE(&sr);
/* Free last/original copy of the packet */
m_freem(packet);
/* Encapsulate the original message "inside" an sadb_msg header */
bzero(buffer, sizeof(struct sadb_msg));
smsg = (struct sadb_msg *) buffer;
smsg->sadb_msg_version = PF_KEY_V2;
smsg->sadb_msg_type = SADB_X_PROMISC;
smsg->sadb_msg_len = (sizeof(struct sadb_msg) + j) /
sizeof(uint64_t);
smsg->sadb_msg_seq = 0;
/* Convert to mbuf chain */
if ((rval = pfdatatopacket(buffer, sizeof(struct sadb_msg) + j,
&packet)) != 0)
goto ret;
/* Send to all registered promiscuous listeners */
SRPL_FOREACH(kp, &sr, &pkptable.pkp_list, kcb_list) {
if (kp->kcb_rdomain != rdomain)
continue;
keylock(kp);
if ((kp->kcb_flags & PFKEYV2_SOCKETFLAGS_PROMISC) &&
!(kp->kcb_flags & PFKEYV2_SOCKETFLAGS_REGISTERED))
pfkey_sendup(kp, packet, 1);
keyunlock(kp);
}
SRPL_LEAVE(&sr);
m_freem(packet);
break;
case PFKEYV2_SENDMESSAGE_BROADCAST:
/* Send message to all sockets */
SRPL_FOREACH(kp, &sr, &pkptable.pkp_list, kcb_list) {
if (kp->kcb_rdomain != rdomain)
continue;
keylock(kp);
pfkey_sendup(kp, packet, 1);
keyunlock(kp);
}
SRPL_LEAVE(&sr);
m_freem(packet);
break;
}
ret:
if (buffer != NULL) {
explicit_bzero(buffer, j + sizeof(struct sadb_msg));
free(buffer, M_PFKEY, j + sizeof(struct sadb_msg));
}
return (rval);
}
/*
* Get SPD information for an ACQUIRE. We setup the message such that
* the SRC/DST payloads are relative to us (regardless of whether the
* SPD rule was for incoming or outgoing packets).
*/
int
pfkeyv2_policy(struct ipsec_acquire *ipa, void **headers, void **buffer,
int *bufferlen)
{
union sockaddr_union sunion;
struct sadb_protocol *sp;
int rval, i, dir;
void *p;
/* Find out how big a buffer we need */
i = 4 * sizeof(struct sadb_address) + sizeof(struct sadb_protocol);
bzero(&sunion, sizeof(union sockaddr_union));
switch (ipa->ipa_info.sen_type) {
case SENT_IP4:
i += 4 * PADUP(sizeof(struct sockaddr_in));
sunion.sa.sa_family = AF_INET;
sunion.sa.sa_len = sizeof(struct sockaddr_in);
dir = ipa->ipa_info.sen_direction;
break;
#ifdef INET6
case SENT_IP6:
i += 4 * PADUP(sizeof(struct sockaddr_in6));
sunion.sa.sa_family = AF_INET6;
sunion.sa.sa_len = sizeof(struct sockaddr_in6);
dir = ipa->ipa_info.sen_ip6_direction;
break;
#endif /* INET6 */
default:
return (EINVAL);
}
if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) {
rval = ENOMEM;
goto ret;
} else {
*buffer = p;
*bufferlen = i;
}
if (dir == IPSP_DIRECTION_OUT)
headers[SADB_X_EXT_SRC_FLOW] = p;
else
headers[SADB_X_EXT_DST_FLOW] = p;
switch (sunion.sa.sa_family) {
case AF_INET:
sunion.sin.sin_addr = ipa->ipa_info.sen_ip_src;
sunion.sin.sin_port = ipa->ipa_info.sen_sport;
break;
#ifdef INET6
case AF_INET6:
sunion.sin6.sin6_addr = ipa->ipa_info.sen_ip6_src;
sunion.sin6.sin6_port = ipa->ipa_info.sen_ip6_sport;
break;
#endif /* INET6 */
}
export_address(&p, &sunion.sa);
if (dir == IPSP_DIRECTION_OUT)
headers[SADB_X_EXT_SRC_MASK] = p;
else
headers[SADB_X_EXT_DST_MASK] = p;
switch (sunion.sa.sa_family) {
case AF_INET:
sunion.sin.sin_addr = ipa->ipa_mask.sen_ip_src;
sunion.sin.sin_port = ipa->ipa_mask.sen_sport;
break;
#ifdef INET6
case AF_INET6:
sunion.sin6.sin6_addr = ipa->ipa_mask.sen_ip6_src;
sunion.sin6.sin6_port = ipa->ipa_mask.sen_ip6_sport;
break;
#endif /* INET6 */
}
export_address(&p, &sunion.sa);
if (dir == IPSP_DIRECTION_OUT)
headers[SADB_X_EXT_DST_FLOW] = p;
else
headers[SADB_X_EXT_SRC_FLOW] = p;
switch (sunion.sa.sa_family) {
case AF_INET:
sunion.sin.sin_addr = ipa->ipa_info.sen_ip_dst;
sunion.sin.sin_port = ipa->ipa_info.sen_dport;
break;
#ifdef INET6
case AF_INET6:
sunion.sin6.sin6_addr = ipa->ipa_info.sen_ip6_dst;
sunion.sin6.sin6_port = ipa->ipa_info.sen_ip6_dport;
break;
#endif /* INET6 */
}
export_address(&p, &sunion.sa);
if (dir == IPSP_DIRECTION_OUT)
headers[SADB_X_EXT_DST_MASK] = p;
else
headers[SADB_X_EXT_SRC_MASK] = p;
switch (sunion.sa.sa_family) {
case AF_INET:
sunion.sin.sin_addr = ipa->ipa_mask.sen_ip_dst;
sunion.sin.sin_port = ipa->ipa_mask.sen_dport;
break;
#ifdef INET6
case AF_INET6:
sunion.sin6.sin6_addr = ipa->ipa_mask.sen_ip6_dst;
sunion.sin6.sin6_port = ipa->ipa_mask.sen_ip6_dport;
break;
#endif /* INET6 */
}
export_address(&p, &sunion.sa);
headers[SADB_X_EXT_FLOW_TYPE] = p;
sp = p;
sp->sadb_protocol_len = sizeof(struct sadb_protocol) /
sizeof(u_int64_t);
switch (sunion.sa.sa_family) {
case AF_INET:
if (ipa->ipa_mask.sen_proto)
sp->sadb_protocol_proto = ipa->ipa_info.sen_proto;
sp->sadb_protocol_direction = ipa->ipa_info.sen_direction;
break;
#ifdef INET6
case AF_INET6:
if (ipa->ipa_mask.sen_ip6_proto)
sp->sadb_protocol_proto = ipa->ipa_info.sen_ip6_proto;
sp->sadb_protocol_direction = ipa->ipa_info.sen_ip6_direction;
break;
#endif /* INET6 */
}
rval = 0;
ret:
return (rval);
}
/*
* Get all the information contained in an SA to a PFKEYV2 message.
*/
int
pfkeyv2_get(struct tdb *tdb, void **headers, void **buffer, int *lenp,
int *lenused)
{
int rval, i;
void *p;
NET_ASSERT_LOCKED();
/* Find how much space we need */
i = sizeof(struct sadb_sa) + sizeof(struct sadb_lifetime) +
sizeof(struct sadb_x_counter);
if (tdb->tdb_soft_allocations || tdb->tdb_soft_bytes ||
tdb->tdb_soft_timeout || tdb->tdb_soft_first_use)
i += sizeof(struct sadb_lifetime);
if (tdb->tdb_exp_allocations || tdb->tdb_exp_bytes ||
tdb->tdb_exp_timeout || tdb->tdb_exp_first_use)
i += sizeof(struct sadb_lifetime);
if (tdb->tdb_last_used)
i += sizeof(struct sadb_lifetime);
i += sizeof(struct sadb_address) + PADUP(tdb->tdb_src.sa.sa_len);
i += sizeof(struct sadb_address) + PADUP(tdb->tdb_dst.sa.sa_len);
if (tdb->tdb_ids) {
i += sizeof(struct sadb_ident) + PADUP(tdb->tdb_ids->id_local->len);
i += sizeof(struct sadb_ident) + PADUP(tdb->tdb_ids->id_remote->len);
}
if (tdb->tdb_amxkey)
i += sizeof(struct sadb_key) + PADUP(tdb->tdb_amxkeylen);
if (tdb->tdb_emxkey)
i += sizeof(struct sadb_key) + PADUP(tdb->tdb_emxkeylen);
if (tdb->tdb_filter.sen_type) {
i += 2 * sizeof(struct sadb_protocol);
/* We'll need four of them: src, src mask, dst, dst mask. */
switch (tdb->tdb_filter.sen_type) {
case SENT_IP4:
i += 4 * PADUP(sizeof(struct sockaddr_in));
i += 4 * sizeof(struct sadb_address);
break;
#ifdef INET6
case SENT_IP6:
i += 4 * PADUP(sizeof(struct sockaddr_in6));
i += 4 * sizeof(struct sadb_address);
break;
#endif /* INET6 */
default:
rval = EINVAL;
goto ret;
}
}
if (tdb->tdb_onext) {
i += sizeof(struct sadb_sa);
i += sizeof(struct sadb_address) +
PADUP(tdb->tdb_onext->tdb_dst.sa.sa_len);
i += sizeof(struct sadb_protocol);
}
if (tdb->tdb_udpencap_port)
i += sizeof(struct sadb_x_udpencap);
i += sizeof(struct sadb_x_replay);
if (tdb->tdb_mtu > 0)
i+= sizeof(struct sadb_x_mtu);
if (tdb->tdb_rdomain != tdb->tdb_rdomain_post)
i += sizeof(struct sadb_x_rdomain);
#if NPF > 0
if (tdb->tdb_tag)
i += sizeof(struct sadb_x_tag) + PADUP(PF_TAG_NAME_SIZE);
if (tdb->tdb_tap)
i += sizeof(struct sadb_x_tap);
#endif
if (ISSET(tdb->tdb_flags, TDBF_IFACE))
i += sizeof(struct sadb_x_iface);
if (lenp)
*lenp = i;
if (buffer == NULL) {
rval = 0;
goto ret;
}
if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) {
rval = ENOMEM;
goto ret;
} else
*buffer = p;
headers[SADB_EXT_SA] = p;
export_sa(&p, tdb); /* Export SA information (mostly flags) */
/* Export lifetimes where applicable */
headers[SADB_EXT_LIFETIME_CURRENT] = p;
export_lifetime(&p, tdb, PFKEYV2_LIFETIME_CURRENT);
if (tdb->tdb_soft_allocations || tdb->tdb_soft_bytes ||
tdb->tdb_soft_first_use || tdb->tdb_soft_timeout) {
headers[SADB_EXT_LIFETIME_SOFT] = p;
export_lifetime(&p, tdb, PFKEYV2_LIFETIME_SOFT);
}
if (tdb->tdb_exp_allocations || tdb->tdb_exp_bytes ||
tdb->tdb_exp_first_use || tdb->tdb_exp_timeout) {
headers[SADB_EXT_LIFETIME_HARD] = p;
export_lifetime(&p, tdb, PFKEYV2_LIFETIME_HARD);
}
if (tdb->tdb_last_used) {
headers[SADB_X_EXT_LIFETIME_LASTUSE] = p;
export_lifetime(&p, tdb, PFKEYV2_LIFETIME_LASTUSE);
}
/* Export TDB source address */
headers[SADB_EXT_ADDRESS_SRC] = p;
export_address(&p, &tdb->tdb_src.sa);
/* Export TDB destination address */
headers[SADB_EXT_ADDRESS_DST] = p;
export_address(&p, &tdb->tdb_dst.sa);
/* Export source/destination identities, if present */
if (tdb->tdb_ids)
export_identities(&p, tdb->tdb_ids, tdb->tdb_ids_swapped, headers);
/* Export authentication key, if present */
if (tdb->tdb_amxkey) {
headers[SADB_EXT_KEY_AUTH] = p;
export_key(&p, tdb, PFKEYV2_AUTHENTICATION_KEY);
}
/* Export encryption key, if present */
if (tdb->tdb_emxkey) {
headers[SADB_EXT_KEY_ENCRYPT] = p;
export_key(&p, tdb, PFKEYV2_ENCRYPTION_KEY);
}
/* Export flow/filter, if present */
if (tdb->tdb_filter.sen_type)
export_flow(&p, IPSP_IPSEC_USE, &tdb->tdb_filter,
&tdb->tdb_filtermask, headers);
if (tdb->tdb_onext) {
headers[SADB_X_EXT_SA2] = p;
export_sa(&p, tdb->tdb_onext);
headers[SADB_X_EXT_DST2] = p;
export_address(&p, &tdb->tdb_onext->tdb_dst.sa);
headers[SADB_X_EXT_SATYPE2] = p;
export_satype(&p, tdb->tdb_onext);
}
/* Export UDP encapsulation port, if present */
if (tdb->tdb_udpencap_port) {
headers[SADB_X_EXT_UDPENCAP] = p;
export_udpencap(&p, tdb);
}
headers[SADB_X_EXT_REPLAY] = p;
export_replay(&p, tdb);
if (tdb->tdb_mtu > 0) {
headers[SADB_X_EXT_MTU] = p;
export_mtu(&p, tdb);
}
/* Export rdomain switch, if present */
if (tdb->tdb_rdomain != tdb->tdb_rdomain_post) {
headers[SADB_X_EXT_RDOMAIN] = p;
export_rdomain(&p, tdb);
}
#if NPF > 0
/* Export tag information, if present */
if (tdb->tdb_tag) {
headers[SADB_X_EXT_TAG] = p;
export_tag(&p, tdb);
}
/* Export tap enc(4) device information, if present */
if (tdb->tdb_tap) {
headers[SADB_X_EXT_TAP] = p;
export_tap(&p, tdb);
}
#endif
/* Export sec(4) interface information, if present */
if (ISSET(tdb->tdb_flags, TDBF_IFACE)) {
headers[SADB_X_EXT_IFACE] = p;
export_iface(&p, tdb);
}
headers[SADB_X_EXT_COUNTER] = p;
export_counter(&p, tdb);
if (lenused)
*lenused = p - *buffer;
rval = 0;
ret:
return (rval);
}
/*
* Dump a TDB.
*/
int
pfkeyv2_dump_walker(struct tdb *tdb, void *state, int last)
{
struct dump_state *dump_state = (struct dump_state *) state;
void *headers[SADB_EXT_MAX+1], *buffer;
int buflen;
int rval;
/* If not satype was specified, dump all TDBs */
if (!dump_state->sadb_msg->sadb_msg_satype ||
(tdb->tdb_satype == dump_state->sadb_msg->sadb_msg_satype)) {
bzero(headers, sizeof(headers));
headers[0] = (void *) dump_state->sadb_msg;
/* Get the information from the TDB to a PFKEYv2 message */
if ((rval = pfkeyv2_get(tdb, headers, &buffer, &buflen, NULL)) != 0)
return (rval);
if (last)
((struct sadb_msg *)headers[0])->sadb_msg_seq = 0;
/* Send the message to the specified socket */
rval = pfkeyv2_sendmessage(headers,
PFKEYV2_SENDMESSAGE_UNICAST, dump_state->socket, 0, 0,
tdb->tdb_rdomain);
explicit_bzero(buffer, buflen);
free(buffer, M_PFKEY, buflen);
if (rval)
return (rval);
}
return (0);
}
/*
* Delete an SA.
*/
int
pfkeyv2_sa_flush(struct tdb *tdb, void *satype_vp, int last)
{
if (!(*((u_int8_t *) satype_vp)) ||
tdb->tdb_satype == *((u_int8_t *) satype_vp))
tdb_delete(tdb);
return (0);
}
/*
* Convert between SATYPEs and IPsec protocols, taking into consideration
* sysctl variables enabling/disabling ESP/AH and the presence of the old
* IPsec transforms.
*/
int
pfkeyv2_get_proto_alg(u_int8_t satype, u_int8_t *sproto, int *alg)
{
switch (satype) {
#ifdef IPSEC
case SADB_SATYPE_AH:
if (!ah_enable)
return (EOPNOTSUPP);
*sproto = IPPROTO_AH;
if(alg != NULL)
*alg = satype = XF_AH;
break;
case SADB_SATYPE_ESP:
if (!esp_enable)
return (EOPNOTSUPP);
*sproto = IPPROTO_ESP;
if(alg != NULL)
*alg = satype = XF_ESP;
break;
case SADB_X_SATYPE_IPIP:
*sproto = IPPROTO_IPIP;
if (alg != NULL)
*alg = XF_IP4;
break;
case SADB_X_SATYPE_IPCOMP:
if (!ipcomp_enable)
return (EOPNOTSUPP);
*sproto = IPPROTO_IPCOMP;
if(alg != NULL)
*alg = satype = XF_IPCOMP;
break;
#endif /* IPSEC */
#ifdef TCP_SIGNATURE
case SADB_X_SATYPE_TCPSIGNATURE:
*sproto = IPPROTO_TCP;
if (alg != NULL)
*alg = XF_TCPSIGNATURE;
break;
#endif /* TCP_SIGNATURE */
default: /* Nothing else supported */
return (EOPNOTSUPP);
}
return (0);
}
/*
* Handle all messages from userland to kernel.
*/
int
pfkeyv2_dosend(struct socket *so, void *message, int len)
{
int i, j, rval = 0, mode = PFKEYV2_SENDMESSAGE_BROADCAST;
int delflag = 0;
struct sockaddr_encap encapdst, encapnetmask;
struct ipsec_policy *ipo;
struct ipsec_acquire *ipa;
struct radix_node_head *rnh;
struct radix_node *rn = NULL;
struct pkpcb *kp, *bkp;
void *freeme = NULL, *freeme2 = NULL, *freeme3 = NULL;
int freeme_sz = 0, freeme2_sz = 0, freeme3_sz = 0;
void *bckptr = NULL;
void *headers[SADB_EXT_MAX + 1];
union sockaddr_union *sunionp;
struct tdb *sa1 = NULL, *sa2 = NULL;
struct sadb_msg *smsg;
struct sadb_spirange *sprng;
struct sadb_sa *ssa;
struct sadb_supported *ssup;
struct sadb_ident *sid, *did;
struct srp_ref sr;
struct sadb_x_rdomain *srdomain;
u_int rdomain = 0;
int promisc;
mtx_enter(&pfkeyv2_mtx);
promisc = npromisc;
mtx_leave(&pfkeyv2_mtx);
/* Verify that we received this over a legitimate pfkeyv2 socket */
bzero(headers, sizeof(headers));
kp = sotokeycb(so);
if (!kp) {
rval = EINVAL;
goto ret;
}
rdomain = kp->kcb_rdomain;
/* Validate message format */
if ((rval = pfkeyv2_parsemessage(message, len, headers)) != 0)
goto ret;
/* If we have any promiscuous listeners, send them a copy of the message */
if (promisc) {
struct mbuf *packet;
freeme_sz = sizeof(struct sadb_msg) + len;
if (!(freeme = malloc(freeme_sz, M_PFKEY, M_NOWAIT))) {
rval = ENOMEM;
goto ret;
}
/* Initialize encapsulating header */
bzero(freeme, sizeof(struct sadb_msg));
smsg = (struct sadb_msg *) freeme;
smsg->sadb_msg_version = PF_KEY_V2;
smsg->sadb_msg_type = SADB_X_PROMISC;
smsg->sadb_msg_len = (sizeof(struct sadb_msg) + len) /
sizeof(uint64_t);
smsg->sadb_msg_seq = curproc->p_p->ps_pid;
bcopy(message, freeme + sizeof(struct sadb_msg), len);
/* Convert to mbuf chain */
if ((rval = pfdatatopacket(freeme, freeme_sz, &packet)) != 0)
goto ret;
/* Send to all promiscuous listeners */
SRPL_FOREACH(bkp, &sr, &pkptable.pkp_list, kcb_list) {
if (bkp->kcb_rdomain != kp->kcb_rdomain)
continue;
keylock(bkp);
if (bkp->kcb_flags & PFKEYV2_SOCKETFLAGS_PROMISC)
pfkey_sendup(bkp, packet, 1);
keyunlock(bkp);
}
SRPL_LEAVE(&sr);
m_freem(packet);
/* Paranoid */
explicit_bzero(freeme, freeme_sz);
free(freeme, M_PFKEY, freeme_sz);
freeme = NULL;
freeme_sz = 0;
}
/* use specified rdomain */
srdomain = (struct sadb_x_rdomain *) headers[SADB_X_EXT_RDOMAIN];
if (srdomain) {
if (!rtable_exists(srdomain->sadb_x_rdomain_dom1) ||
!rtable_exists(srdomain->sadb_x_rdomain_dom2)) {
rval = EINVAL;
goto ret;
}
rdomain = srdomain->sadb_x_rdomain_dom1;
}
smsg = (struct sadb_msg *) headers[0];
switch (smsg->sadb_msg_type) {
case SADB_GETSPI: /* Reserve an SPI */
sa1 = malloc(sizeof (*sa1), M_PFKEY, M_NOWAIT | M_ZERO);
if (sa1 == NULL) {
rval = ENOMEM;
goto ret;
}
sa1->tdb_satype = smsg->sadb_msg_satype;
if ((rval = pfkeyv2_get_proto_alg(sa1->tdb_satype,
&sa1->tdb_sproto, 0)))
goto ret;
import_address(&sa1->tdb_src.sa, headers[SADB_EXT_ADDRESS_SRC]);
import_address(&sa1->tdb_dst.sa, headers[SADB_EXT_ADDRESS_DST]);
/* Find an unused SA identifier */
sprng = (struct sadb_spirange *) headers[SADB_EXT_SPIRANGE];
NET_LOCK();
sa1->tdb_spi = reserve_spi(rdomain,
sprng->sadb_spirange_min, sprng->sadb_spirange_max,
&sa1->tdb_src, &sa1->tdb_dst, sa1->tdb_sproto, &rval);
if (sa1->tdb_spi == 0) {
NET_UNLOCK();
goto ret;
}
/* Send a message back telling what the SA (the SPI really) is */
freeme_sz = sizeof(struct sadb_sa);
if (!(freeme = malloc(freeme_sz, M_PFKEY, M_NOWAIT | M_ZERO))) {
rval = ENOMEM;
NET_UNLOCK();
goto ret;
}
headers[SADB_EXT_SPIRANGE] = NULL;
headers[SADB_EXT_SA] = freeme;
bckptr = freeme;
/* We really only care about the SPI, but we'll export the SA */
export_sa((void **) &bckptr, sa1);
NET_UNLOCK();
break;
case SADB_UPDATE:
ssa = (struct sadb_sa *) headers[SADB_EXT_SA];
sunionp = (union sockaddr_union *) (headers[SADB_EXT_ADDRESS_DST] +
sizeof(struct sadb_address));
/* Either all or none of the flow must be included */
if ((headers[SADB_X_EXT_SRC_FLOW] ||
headers[SADB_X_EXT_PROTOCOL] ||
headers[SADB_X_EXT_FLOW_TYPE] ||
headers[SADB_X_EXT_DST_FLOW] ||
headers[SADB_X_EXT_SRC_MASK] ||
headers[SADB_X_EXT_DST_MASK]) &&
!(headers[SADB_X_EXT_SRC_FLOW] &&
headers[SADB_X_EXT_PROTOCOL] &&
headers[SADB_X_EXT_FLOW_TYPE] &&
headers[SADB_X_EXT_DST_FLOW] &&
headers[SADB_X_EXT_SRC_MASK] &&
headers[SADB_X_EXT_DST_MASK])) {
rval = EINVAL;
goto ret;
}
#ifdef IPSEC
/* UDP encap has to be enabled and is only supported for ESP */
if (headers[SADB_X_EXT_UDPENCAP] &&
(!udpencap_enable ||
smsg->sadb_msg_satype != SADB_SATYPE_ESP)) {
rval = EINVAL;
goto ret;
}
#endif /* IPSEC */
/* Find TDB */
NET_LOCK();
sa2 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp,
SADB_X_GETSPROTO(smsg->sadb_msg_satype));
/* If there's no such SA, we're done */
if (sa2 == NULL) {
rval = ESRCH;
NET_UNLOCK();
goto ret;
}
/* If this is a reserved SA */
if (sa2->tdb_flags & TDBF_INVALID) {
struct tdb *newsa;
struct ipsecinit ii;
int alg;
/* Create new TDB */
newsa = tdb_alloc(rdomain);
newsa->tdb_satype = smsg->sadb_msg_satype;
if ((rval = pfkeyv2_get_proto_alg(newsa->tdb_satype,
&newsa->tdb_sproto, &alg))) {
tdb_unref(newsa);
NET_UNLOCK();
goto ret;
}
/* Initialize SA */
bzero(&ii, sizeof(struct ipsecinit));
import_sa(newsa, headers[SADB_EXT_SA], &ii);
import_address(&newsa->tdb_src.sa,
headers[SADB_EXT_ADDRESS_SRC]);
import_address(&newsa->tdb_dst.sa,
headers[SADB_EXT_ADDRESS_DST]);
import_lifetime(newsa,
headers[SADB_EXT_LIFETIME_CURRENT],
PFKEYV2_LIFETIME_CURRENT);
import_lifetime(newsa, headers[SADB_EXT_LIFETIME_SOFT],
PFKEYV2_LIFETIME_SOFT);
import_lifetime(newsa, headers[SADB_EXT_LIFETIME_HARD],
PFKEYV2_LIFETIME_HARD);
import_key(&ii, headers[SADB_EXT_KEY_AUTH],
PFKEYV2_AUTHENTICATION_KEY);
import_key(&ii, headers[SADB_EXT_KEY_ENCRYPT],
PFKEYV2_ENCRYPTION_KEY);
newsa->tdb_ids_swapped = 1; /* only on TDB_UPDATE */
import_identities(&newsa->tdb_ids,
newsa->tdb_ids_swapped,
headers[SADB_EXT_IDENTITY_SRC],
headers[SADB_EXT_IDENTITY_DST]);
if ((rval = import_flow(&newsa->tdb_filter,
&newsa->tdb_filtermask,
headers[SADB_X_EXT_SRC_FLOW],
headers[SADB_X_EXT_SRC_MASK],
headers[SADB_X_EXT_DST_FLOW],
headers[SADB_X_EXT_DST_MASK],
headers[SADB_X_EXT_PROTOCOL],
headers[SADB_X_EXT_FLOW_TYPE]))) {
tdb_unref(newsa);
NET_UNLOCK();
goto ret;
}
import_udpencap(newsa, headers[SADB_X_EXT_UDPENCAP]);
import_rdomain(newsa, headers[SADB_X_EXT_RDOMAIN]);
#if NPF > 0
import_tag(newsa, headers[SADB_X_EXT_TAG]);
import_tap(newsa, headers[SADB_X_EXT_TAP]);
#endif
import_iface(newsa, headers[SADB_X_EXT_IFACE]);
/* Exclude sensitive data from reply message. */
headers[SADB_EXT_KEY_AUTH] = NULL;
headers[SADB_EXT_KEY_ENCRYPT] = NULL;
headers[SADB_X_EXT_LOCAL_AUTH] = NULL;
headers[SADB_X_EXT_REMOTE_AUTH] = NULL;
newsa->tdb_seq = smsg->sadb_msg_seq;
rval = tdb_init(newsa, alg, &ii);
if (rval) {
rval = EINVAL;
tdb_unref(newsa);
NET_UNLOCK();
goto ret;
}
newsa->tdb_cur_allocations = sa2->tdb_cur_allocations;
/* Delete old version of the SA, insert new one */
tdb_delete(sa2);
tdb_addtimeouts(newsa);
puttdb(newsa);
} else {
/*
* The SA is already initialized, so we're only allowed to
* change lifetimes and some other information; we're
* not allowed to change keys, addresses or identities.
*/
if (headers[SADB_EXT_KEY_AUTH] ||
headers[SADB_EXT_KEY_ENCRYPT] ||
headers[SADB_EXT_IDENTITY_SRC] ||
headers[SADB_EXT_IDENTITY_DST] ||
headers[SADB_EXT_SENSITIVITY]) {
rval = EINVAL;
NET_UNLOCK();
goto ret;
}
import_sa(sa2, headers[SADB_EXT_SA], NULL);
import_lifetime(sa2,
headers[SADB_EXT_LIFETIME_CURRENT],
PFKEYV2_LIFETIME_CURRENT);
import_lifetime(sa2, headers[SADB_EXT_LIFETIME_SOFT],
PFKEYV2_LIFETIME_SOFT);
import_lifetime(sa2, headers[SADB_EXT_LIFETIME_HARD],
PFKEYV2_LIFETIME_HARD);
import_udpencap(sa2, headers[SADB_X_EXT_UDPENCAP]);
#if NPF > 0
import_tag(sa2, headers[SADB_X_EXT_TAG]);
import_tap(sa2, headers[SADB_X_EXT_TAP]);
#endif
import_iface(sa2, headers[SADB_X_EXT_IFACE]);
tdb_addtimeouts(sa2);
if (headers[SADB_EXT_ADDRESS_SRC] ||
headers[SADB_EXT_ADDRESS_PROXY]) {
mtx_enter(&tdb_sadb_mtx);
tdb_unlink_locked(sa2);
import_address((struct sockaddr *)&sa2->tdb_src,
headers[SADB_EXT_ADDRESS_SRC]);
import_address((struct sockaddr *)&sa2->tdb_dst,
headers[SADB_EXT_ADDRESS_PROXY]);
puttdb_locked(sa2);
mtx_leave(&tdb_sadb_mtx);
}
}
NET_UNLOCK();
break;
case SADB_ADD:
ssa = (struct sadb_sa *) headers[SADB_EXT_SA];
sunionp = (union sockaddr_union *) (headers[SADB_EXT_ADDRESS_DST] +
sizeof(struct sadb_address));
/* Either all or none of the flow must be included */
if ((headers[SADB_X_EXT_SRC_FLOW] ||
headers[SADB_X_EXT_PROTOCOL] ||
headers[SADB_X_EXT_FLOW_TYPE] ||
headers[SADB_X_EXT_DST_FLOW] ||
headers[SADB_X_EXT_SRC_MASK] ||
headers[SADB_X_EXT_DST_MASK]) &&
!(headers[SADB_X_EXT_SRC_FLOW] &&
headers[SADB_X_EXT_PROTOCOL] &&
headers[SADB_X_EXT_FLOW_TYPE] &&
headers[SADB_X_EXT_DST_FLOW] &&
headers[SADB_X_EXT_SRC_MASK] &&
headers[SADB_X_EXT_DST_MASK])) {
rval = EINVAL;
goto ret;
}
#ifdef IPSEC
/* UDP encap has to be enabled and is only supported for ESP */
if (headers[SADB_X_EXT_UDPENCAP] &&
(!udpencap_enable ||
smsg->sadb_msg_satype != SADB_SATYPE_ESP)) {
rval = EINVAL;
goto ret;
}
#endif /* IPSEC */
NET_LOCK();
sa2 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp,
SADB_X_GETSPROTO(smsg->sadb_msg_satype));
/* We can't add an existing SA! */
if (sa2 != NULL) {
rval = EEXIST;
NET_UNLOCK();
goto ret;
}
/* We can only add "mature" SAs */
if (ssa->sadb_sa_state != SADB_SASTATE_MATURE) {
rval = EINVAL;
NET_UNLOCK();
goto ret;
}
{
struct tdb *newsa;
struct ipsecinit ii;
int alg;
/* Create new TDB */
newsa = tdb_alloc(rdomain);
newsa->tdb_satype = smsg->sadb_msg_satype;
if ((rval = pfkeyv2_get_proto_alg(newsa->tdb_satype,
&newsa->tdb_sproto, &alg))) {
tdb_unref(newsa);
NET_UNLOCK();
goto ret;
}
/* Initialize SA */
bzero(&ii, sizeof(struct ipsecinit));
import_sa(newsa, headers[SADB_EXT_SA], &ii);
import_address(&newsa->tdb_src.sa,
headers[SADB_EXT_ADDRESS_SRC]);
import_address(&newsa->tdb_dst.sa,
headers[SADB_EXT_ADDRESS_DST]);
import_lifetime(newsa,
headers[SADB_EXT_LIFETIME_CURRENT],
PFKEYV2_LIFETIME_CURRENT);
import_lifetime(newsa, headers[SADB_EXT_LIFETIME_SOFT],
PFKEYV2_LIFETIME_SOFT);
import_lifetime(newsa, headers[SADB_EXT_LIFETIME_HARD],
PFKEYV2_LIFETIME_HARD);
import_key(&ii, headers[SADB_EXT_KEY_AUTH],
PFKEYV2_AUTHENTICATION_KEY);
import_key(&ii, headers[SADB_EXT_KEY_ENCRYPT],
PFKEYV2_ENCRYPTION_KEY);
import_identities(&newsa->tdb_ids,
newsa->tdb_ids_swapped,
headers[SADB_EXT_IDENTITY_SRC],
headers[SADB_EXT_IDENTITY_DST]);
if ((rval = import_flow(&newsa->tdb_filter,
&newsa->tdb_filtermask,
headers[SADB_X_EXT_SRC_FLOW],
headers[SADB_X_EXT_SRC_MASK],
headers[SADB_X_EXT_DST_FLOW],
headers[SADB_X_EXT_DST_MASK],
headers[SADB_X_EXT_PROTOCOL],
headers[SADB_X_EXT_FLOW_TYPE]))) {
tdb_unref(newsa);
NET_UNLOCK();
goto ret;
}
import_udpencap(newsa, headers[SADB_X_EXT_UDPENCAP]);
import_rdomain(newsa, headers[SADB_X_EXT_RDOMAIN]);
#if NPF > 0
import_tag(newsa, headers[SADB_X_EXT_TAG]);
import_tap(newsa, headers[SADB_X_EXT_TAP]);
#endif
import_iface(newsa, headers[SADB_X_EXT_IFACE]);
/* Exclude sensitive data from reply message. */
headers[SADB_EXT_KEY_AUTH] = NULL;
headers[SADB_EXT_KEY_ENCRYPT] = NULL;
headers[SADB_X_EXT_LOCAL_AUTH] = NULL;
headers[SADB_X_EXT_REMOTE_AUTH] = NULL;
newsa->tdb_seq = smsg->sadb_msg_seq;
rval = tdb_init(newsa, alg, &ii);
if (rval) {
rval = EINVAL;
tdb_unref(newsa);
NET_UNLOCK();
goto ret;
}
tdb_addtimeouts(newsa);
/* Add TDB in table */
puttdb(newsa);
}
NET_UNLOCK();
break;
case SADB_DELETE:
ssa = (struct sadb_sa *) headers[SADB_EXT_SA];
sunionp =
(union sockaddr_union *)(headers[SADB_EXT_ADDRESS_DST] +
sizeof(struct sadb_address));
NET_LOCK();
sa2 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp,
SADB_X_GETSPROTO(smsg->sadb_msg_satype));
if (sa2 == NULL) {
rval = ESRCH;
NET_UNLOCK();
goto ret;
}
tdb_delete(sa2);
NET_UNLOCK();
break;
case SADB_X_ASKPOLICY:
/* Get the relevant policy */
NET_LOCK();
ipa = ipsec_get_acquire(((struct sadb_x_policy *)
headers[SADB_X_EXT_POLICY])->sadb_x_policy_seq);
if (ipa == NULL) {
rval = ESRCH;
NET_UNLOCK();
goto ret;
}
rval = pfkeyv2_policy(ipa, headers, &freeme, &freeme_sz);
NET_UNLOCK();
ipsec_unref_acquire(ipa);
if (rval)
mode = PFKEYV2_SENDMESSAGE_UNICAST;
break;
case SADB_GET:
ssa = (struct sadb_sa *) headers[SADB_EXT_SA];
sunionp =
(union sockaddr_union *)(headers[SADB_EXT_ADDRESS_DST] +
sizeof(struct sadb_address));
NET_LOCK();
sa2 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp,
SADB_X_GETSPROTO(smsg->sadb_msg_satype));
if (sa2 == NULL) {
rval = ESRCH;
NET_UNLOCK();
goto ret;
}
rval = pfkeyv2_get(sa2, headers, &freeme, &freeme_sz, NULL);
NET_UNLOCK();
if (rval)
mode = PFKEYV2_SENDMESSAGE_UNICAST;
break;
case SADB_REGISTER:
keylock(kp);
if (!(kp->kcb_flags & PFKEYV2_SOCKETFLAGS_REGISTERED)) {
kp->kcb_flags |= PFKEYV2_SOCKETFLAGS_REGISTERED;
mtx_enter(&pfkeyv2_mtx);
nregistered++;
mtx_leave(&pfkeyv2_mtx);
}
keyunlock(kp);
freeme_sz = sizeof(struct sadb_supported) + sizeof(ealgs);
if (!(freeme = malloc(freeme_sz, M_PFKEY, M_NOWAIT | M_ZERO))) {
rval = ENOMEM;
goto ret;
}
ssup = (struct sadb_supported *) freeme;
ssup->sadb_supported_len = freeme_sz / sizeof(uint64_t);
{
void *p = freeme + sizeof(struct sadb_supported);
bcopy(&ealgs[0], p, sizeof(ealgs));
}
headers[SADB_EXT_SUPPORTED_ENCRYPT] = freeme;
freeme2_sz = sizeof(struct sadb_supported) + sizeof(aalgs);
if (!(freeme2 = malloc(freeme2_sz, M_PFKEY,
M_NOWAIT | M_ZERO))) {
rval = ENOMEM;
goto ret;
}
/* Keep track what this socket has registered for */
keylock(kp);
kp->kcb_reg |=
(1 << ((struct sadb_msg *)message)->sadb_msg_satype);
keyunlock(kp);
ssup = (struct sadb_supported *) freeme2;
ssup->sadb_supported_len = freeme2_sz / sizeof(uint64_t);
{
void *p = freeme2 + sizeof(struct sadb_supported);
bcopy(&aalgs[0], p, sizeof(aalgs));
}
headers[SADB_EXT_SUPPORTED_AUTH] = freeme2;
freeme3_sz = sizeof(struct sadb_supported) + sizeof(calgs);
if (!(freeme3 = malloc(freeme3_sz, M_PFKEY,
M_NOWAIT | M_ZERO))) {
rval = ENOMEM;
goto ret;
}
ssup = (struct sadb_supported *) freeme3;
ssup->sadb_supported_len = freeme3_sz / sizeof(uint64_t);
{
void *p = freeme3 + sizeof(struct sadb_supported);
bcopy(&calgs[0], p, sizeof(calgs));
}
headers[SADB_X_EXT_SUPPORTED_COMP] = freeme3;
break;
case SADB_ACQUIRE:
case SADB_EXPIRE:
/* Nothing to handle */
rval = 0;
break;
case SADB_FLUSH:
rval = 0;
NET_LOCK();
switch (smsg->sadb_msg_satype) {
case SADB_SATYPE_UNSPEC:
spd_table_walk(rdomain, pfkeyv2_policy_flush, NULL);
/* FALLTHROUGH */
case SADB_SATYPE_AH:
case SADB_SATYPE_ESP:
case SADB_X_SATYPE_IPIP:
case SADB_X_SATYPE_IPCOMP:
#ifdef TCP_SIGNATURE
case SADB_X_SATYPE_TCPSIGNATURE:
#endif /* TCP_SIGNATURE */
tdb_walk(rdomain, pfkeyv2_sa_flush,
(u_int8_t *) &(smsg->sadb_msg_satype));
break;
default:
rval = EINVAL; /* Unknown/unsupported type */
}
NET_UNLOCK();
break;
case SADB_DUMP:
{
struct dump_state dump_state;
dump_state.sadb_msg = (struct sadb_msg *) headers[0];
dump_state.socket = so;
NET_LOCK();
rval = tdb_walk(rdomain, pfkeyv2_dump_walker, &dump_state);
NET_UNLOCK();
if (!rval)
goto realret;
if ((rval == ENOMEM) || (rval == ENOBUFS))
rval = 0;
}
break;
case SADB_X_GRPSPIS:
{
struct tdb *tdb1, *tdb2, *tdb3;
struct sadb_protocol *sa_proto;
ssa = (struct sadb_sa *) headers[SADB_EXT_SA];
sunionp = (union sockaddr_union *) (headers[SADB_EXT_ADDRESS_DST] +
sizeof(struct sadb_address));
NET_LOCK();
tdb1 = gettdb(rdomain, ssa->sadb_sa_spi, sunionp,
SADB_X_GETSPROTO(smsg->sadb_msg_satype));
if (tdb1 == NULL) {
rval = ESRCH;
NET_UNLOCK();
goto ret;
}
ssa = (struct sadb_sa *) headers[SADB_X_EXT_SA2];
sunionp = (union sockaddr_union *) (headers[SADB_X_EXT_DST2] +
sizeof(struct sadb_address));
sa_proto = (struct sadb_protocol *) headers[SADB_X_EXT_SATYPE2];
/* optionally fetch tdb2 from rdomain2 */
tdb2 = gettdb(srdomain ? srdomain->sadb_x_rdomain_dom2 : rdomain,
ssa->sadb_sa_spi, sunionp,
SADB_X_GETSPROTO(sa_proto->sadb_protocol_proto));
if (tdb2 == NULL) {
tdb_unref(tdb1);
rval = ESRCH;
NET_UNLOCK();
goto ret;
}
/* Detect cycles */
for (tdb3 = tdb2; tdb3; tdb3 = tdb3->tdb_onext)
if (tdb3 == tdb1) {
tdb_unref(tdb1);
tdb_unref(tdb2);
rval = ESRCH;
NET_UNLOCK();
goto ret;
}
/* Maintenance */
if ((tdb1->tdb_onext) &&
(tdb1->tdb_onext->tdb_inext == tdb1)) {
tdb_unref(tdb1->tdb_onext->tdb_inext);
tdb1->tdb_onext->tdb_inext = NULL;
}
if ((tdb2->tdb_inext) &&
(tdb2->tdb_inext->tdb_onext == tdb2)) {
tdb_unref(tdb2->tdb_inext->tdb_onext);
tdb2->tdb_inext->tdb_onext = NULL;
}
/* Link them */
tdb1->tdb_onext = tdb2;
tdb2->tdb_inext = tdb1;
NET_UNLOCK();
}
break;
case SADB_X_DELFLOW:
delflag = 1;
/*FALLTHROUGH*/
case SADB_X_ADDFLOW:
{
struct sadb_protocol *sab;
union sockaddr_union *ssrc;
int exists = 0;
NET_LOCK();
if ((rnh = spd_table_add(rdomain)) == NULL) {
rval = ENOMEM;
NET_UNLOCK();
goto ret;
}
sab = (struct sadb_protocol *) headers[SADB_X_EXT_FLOW_TYPE];
if ((sab->sadb_protocol_direction != IPSP_DIRECTION_IN) &&
(sab->sadb_protocol_direction != IPSP_DIRECTION_OUT)) {
rval = EINVAL;
NET_UNLOCK();
goto ret;
}
/* If the security protocol wasn't specified, pretend it was ESP */
if (smsg->sadb_msg_satype == 0)
smsg->sadb_msg_satype = SADB_SATYPE_ESP;
if (headers[SADB_EXT_ADDRESS_DST])
sunionp = (union sockaddr_union *)
(headers[SADB_EXT_ADDRESS_DST] +
sizeof(struct sadb_address));
else
sunionp = NULL;
if (headers[SADB_EXT_ADDRESS_SRC])
ssrc = (union sockaddr_union *)
(headers[SADB_EXT_ADDRESS_SRC] +
sizeof(struct sadb_address));
else
ssrc = NULL;
if ((rval = import_flow(&encapdst, &encapnetmask,
headers[SADB_X_EXT_SRC_FLOW], headers[SADB_X_EXT_SRC_MASK],
headers[SADB_X_EXT_DST_FLOW], headers[SADB_X_EXT_DST_MASK],
headers[SADB_X_EXT_PROTOCOL],
headers[SADB_X_EXT_FLOW_TYPE]))) {
NET_UNLOCK();
goto ret;
}
/* Determine whether the exact same SPD entry already exists. */
if ((rn = rn_match(&encapdst, rnh)) != NULL) {
ipo = (struct ipsec_policy *)rn;
/* Verify that the entry is identical */
if (bcmp(&ipo->ipo_addr, &encapdst,
sizeof(struct sockaddr_encap)) ||
bcmp(&ipo->ipo_mask, &encapnetmask,
sizeof(struct sockaddr_encap)))
ipo = NULL; /* Fall through */
else
exists = 1;
} else
ipo = NULL;
/*
* If the existing policy is static, only delete or update
* it if the new one is also static.
*/
if (exists && (ipo->ipo_flags & IPSP_POLICY_STATIC)) {
if (!(sab->sadb_protocol_flags &
SADB_X_POLICYFLAGS_POLICY)) {
NET_UNLOCK();
goto ret;
}
}
/* Delete ? */
if (delflag) {
if (exists) {
rval = ipsec_delete_policy(ipo);
NET_UNLOCK();
goto ret;
}
/* If we were asked to delete something non-existent, error. */
rval = ESRCH;
NET_UNLOCK();
break;
}
if (!exists) {
/* Allocate policy entry */
ipo = pool_get(&ipsec_policy_pool, PR_NOWAIT|PR_ZERO);
if (ipo == NULL) {
rval = ENOMEM;
NET_UNLOCK();
goto ret;
}
}
switch (sab->sadb_protocol_proto) {
case SADB_X_FLOW_TYPE_USE:
ipo->ipo_type = IPSP_IPSEC_USE;
break;
case SADB_X_FLOW_TYPE_ACQUIRE:
ipo->ipo_type = IPSP_IPSEC_ACQUIRE;
break;
case SADB_X_FLOW_TYPE_REQUIRE:
ipo->ipo_type = IPSP_IPSEC_REQUIRE;
break;
case SADB_X_FLOW_TYPE_DENY:
ipo->ipo_type = IPSP_DENY;
break;
case SADB_X_FLOW_TYPE_BYPASS:
ipo->ipo_type = IPSP_PERMIT;
break;
case SADB_X_FLOW_TYPE_DONTACQ:
ipo->ipo_type = IPSP_IPSEC_DONTACQ;
break;
default:
if (!exists)
pool_put(&ipsec_policy_pool, ipo);
else
ipsec_delete_policy(ipo);
rval = EINVAL;
NET_UNLOCK();
goto ret;
}
if (sab->sadb_protocol_flags & SADB_X_POLICYFLAGS_POLICY)
ipo->ipo_flags |= IPSP_POLICY_STATIC;
if (sunionp)
bcopy(sunionp, &ipo->ipo_dst,
sizeof(union sockaddr_union));
else
bzero(&ipo->ipo_dst, sizeof(union sockaddr_union));
if (ssrc)
bcopy(ssrc, &ipo->ipo_src,
sizeof(union sockaddr_union));
else
bzero(&ipo->ipo_src, sizeof(union sockaddr_union));
ipo->ipo_sproto = SADB_X_GETSPROTO(smsg->sadb_msg_satype);
if (ipo->ipo_ids) {
ipsp_ids_free(ipo->ipo_ids);
ipo->ipo_ids = NULL;
}
if ((sid = headers[SADB_EXT_IDENTITY_SRC]) != NULL &&
(did = headers[SADB_EXT_IDENTITY_DST]) != NULL) {
import_identities(&ipo->ipo_ids, 0, sid, did);
if (ipo->ipo_ids == NULL) {
if (exists)
ipsec_delete_policy(ipo);
else
pool_put(&ipsec_policy_pool, ipo);
rval = ENOBUFS;
NET_UNLOCK();
goto ret;
}
}
/* Flow type */
if (!exists) {
/* Initialize policy entry */
bcopy(&encapdst, &ipo->ipo_addr,
sizeof(struct sockaddr_encap));
bcopy(&encapnetmask, &ipo->ipo_mask,
sizeof(struct sockaddr_encap));
TAILQ_INIT(&ipo->ipo_acquires);
ipo->ipo_rdomain = rdomain;
refcnt_init(&ipo->ipo_refcnt);
/* Add SPD entry */
if ((rnh = spd_table_get(rdomain)) == NULL ||
(rn = rn_addroute((caddr_t)&ipo->ipo_addr,
(caddr_t)&ipo->ipo_mask, rnh,
ipo->ipo_nodes, 0)) == NULL) {
/* Remove from linked list of policies on TDB */
mtx_enter(&ipo_tdb_mtx);
if (ipo->ipo_tdb != NULL) {
TAILQ_REMOVE(
&ipo->ipo_tdb->tdb_policy_head,
ipo, ipo_tdb_next);
tdb_unref(ipo->ipo_tdb);
ipo->ipo_tdb = NULL;
}
mtx_leave(&ipo_tdb_mtx);
if (ipo->ipo_ids)
ipsp_ids_free(ipo->ipo_ids);
pool_put(&ipsec_policy_pool, ipo);
NET_UNLOCK();
goto ret;
}
TAILQ_INSERT_HEAD(&ipsec_policy_head, ipo, ipo_list);
ipsec_in_use++;
} else {
ipo->ipo_last_searched = ipo->ipo_flags = 0;
}
NET_UNLOCK();
}
break;
case SADB_X_PROMISC:
if (len >= 2 * sizeof(struct sadb_msg)) {
struct mbuf *packet;
if ((rval = pfdatatopacket(message, len, &packet)) != 0)
goto ret;
SRPL_FOREACH(bkp, &sr, &pkptable.pkp_list, kcb_list) {
if (bkp == kp || bkp->kcb_rdomain != kp->kcb_rdomain)
continue;
if (!smsg->sadb_msg_seq ||
(smsg->sadb_msg_seq == kp->kcb_pid)) {
keylock(bkp);
pfkey_sendup(bkp, packet, 1);
keyunlock(bkp);
}
}
SRPL_LEAVE(&sr);
m_freem(packet);
} else {
if (len != sizeof(struct sadb_msg)) {
rval = EINVAL;
goto ret;
}
keylock(kp);
i = (kp->kcb_flags &
PFKEYV2_SOCKETFLAGS_PROMISC) ? 1 : 0;
j = smsg->sadb_msg_satype ? 1 : 0;
if (i ^ j) {
if (j) {
kp->kcb_flags |=
PFKEYV2_SOCKETFLAGS_PROMISC;
mtx_enter(&pfkeyv2_mtx);
npromisc++;
mtx_leave(&pfkeyv2_mtx);
} else {
kp->kcb_flags &=
~PFKEYV2_SOCKETFLAGS_PROMISC;
mtx_enter(&pfkeyv2_mtx);
npromisc--;
mtx_leave(&pfkeyv2_mtx);
}
}
keyunlock(kp);
}
break;
default:
rval = EINVAL;
goto ret;
}
ret:
if (rval) {
if ((rval == EINVAL) || (rval == ENOMEM) || (rval == ENOBUFS))
goto realret;
for (i = 1; i <= SADB_EXT_MAX; i++)
headers[i] = NULL;
smsg->sadb_msg_errno = abs(rval);
} else {
uint64_t seen = 0LL;
for (i = 1; i <= SADB_EXT_MAX; i++)
if (headers[i])
seen |= (1LL << i);
if ((seen & sadb_exts_allowed_out[smsg->sadb_msg_type])
!= seen) {
rval = EPERM;
goto realret;
}
if ((seen & sadb_exts_required_out[smsg->sadb_msg_type]) !=
sadb_exts_required_out[smsg->sadb_msg_type]) {
rval = EPERM;
goto realret;
}
}
rval = pfkeyv2_sendmessage(headers, mode, so, 0, 0, kp->kcb_rdomain);
realret:
if (freeme != NULL)
explicit_bzero(freeme, freeme_sz);
free(freeme, M_PFKEY, freeme_sz);
free(freeme2, M_PFKEY, freeme2_sz);
free(freeme3, M_PFKEY, freeme3_sz);
explicit_bzero(message, len);
free(message, M_PFKEY, len);
free(sa1, M_PFKEY, sizeof(*sa1));
NET_LOCK();
tdb_unref(sa2);
NET_UNLOCK();
return (rval);
}
/*
* Send an ACQUIRE message to key management, to get a new SA.
*/
int
pfkeyv2_acquire(struct ipsec_policy *ipo, union sockaddr_union *gw,
union sockaddr_union *laddr, u_int32_t *seq, struct sockaddr_encap *ddst)
{
void *p, *headers[SADB_EXT_MAX + 1], *buffer = NULL;
struct sadb_comb *sadb_comb;
struct sadb_address *sadd;
struct sadb_prop *sa_prop;
struct sadb_msg *smsg;
int rval = 0;
int i, j, registered;
mtx_enter(&pfkeyv2_mtx);
*seq = pfkeyv2_seq++;
registered = nregistered;
mtx_leave(&pfkeyv2_mtx);
if (!registered) {
rval = ESRCH;
goto ret;
}
/* How large a buffer do we need... XXX we only do one proposal for now */
i = sizeof(struct sadb_msg) +
(laddr == NULL ? 0 : sizeof(struct sadb_address) +
PADUP(ipo->ipo_src.sa.sa_len)) +
sizeof(struct sadb_address) + PADUP(gw->sa.sa_len) +
sizeof(struct sadb_prop) + 1 * sizeof(struct sadb_comb);
if (ipo->ipo_ids) {
i += sizeof(struct sadb_ident) + PADUP(ipo->ipo_ids->id_local->len);
i += sizeof(struct sadb_ident) + PADUP(ipo->ipo_ids->id_remote->len);
}
/* Allocate */
if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) {
rval = ENOMEM;
goto ret;
}
bzero(headers, sizeof(headers));
buffer = p;
headers[0] = p;
p += sizeof(struct sadb_msg);
smsg = (struct sadb_msg *) headers[0];
smsg->sadb_msg_version = PF_KEY_V2;
smsg->sadb_msg_type = SADB_ACQUIRE;
smsg->sadb_msg_len = i / sizeof(uint64_t);
smsg->sadb_msg_seq = *seq;
if (ipo->ipo_sproto == IPPROTO_ESP)
smsg->sadb_msg_satype = SADB_SATYPE_ESP;
else if (ipo->ipo_sproto == IPPROTO_AH)
smsg->sadb_msg_satype = SADB_SATYPE_AH;
else if (ipo->ipo_sproto == IPPROTO_IPCOMP)
smsg->sadb_msg_satype = SADB_X_SATYPE_IPCOMP;
if (laddr) {
headers[SADB_EXT_ADDRESS_SRC] = p;
p += sizeof(struct sadb_address) + PADUP(laddr->sa.sa_len);
sadd = (struct sadb_address *) headers[SADB_EXT_ADDRESS_SRC];
sadd->sadb_address_len = (sizeof(struct sadb_address) +
laddr->sa.sa_len + sizeof(uint64_t) - 1) /
sizeof(uint64_t);
bcopy(laddr, headers[SADB_EXT_ADDRESS_SRC] +
sizeof(struct sadb_address), laddr->sa.sa_len);
}
headers[SADB_EXT_ADDRESS_DST] = p;
p += sizeof(struct sadb_address) + PADUP(gw->sa.sa_len);
sadd = (struct sadb_address *) headers[SADB_EXT_ADDRESS_DST];
sadd->sadb_address_len = (sizeof(struct sadb_address) +
gw->sa.sa_len + sizeof(uint64_t) - 1) / sizeof(uint64_t);
bcopy(gw, headers[SADB_EXT_ADDRESS_DST] + sizeof(struct sadb_address),
gw->sa.sa_len);
if (ipo->ipo_ids)
export_identities(&p, ipo->ipo_ids, 0, headers);
headers[SADB_EXT_PROPOSAL] = p;
p += sizeof(struct sadb_prop);
sa_prop = (struct sadb_prop *) headers[SADB_EXT_PROPOSAL];
sa_prop->sadb_prop_num = 1; /* XXX One proposal only */
sa_prop->sadb_prop_len = (sizeof(struct sadb_prop) +
(sizeof(struct sadb_comb) * sa_prop->sadb_prop_num)) /
sizeof(uint64_t);
sadb_comb = p;
/* XXX Should actually ask the crypto layer what's supported */
for (j = 0; j < sa_prop->sadb_prop_num; j++) {
sadb_comb->sadb_comb_flags = 0;
#ifdef IPSEC
if (ipsec_require_pfs)
sadb_comb->sadb_comb_flags |= SADB_SAFLAGS_PFS;
/* Set the encryption algorithm */
if (ipo->ipo_sproto == IPPROTO_ESP) {
if (!strncasecmp(ipsec_def_enc, "aes",
sizeof("aes"))) {
sadb_comb->sadb_comb_encrypt = SADB_X_EALG_AES;
sadb_comb->sadb_comb_encrypt_minbits = 128;
sadb_comb->sadb_comb_encrypt_maxbits = 256;
} else if (!strncasecmp(ipsec_def_enc, "aesctr",
sizeof("aesctr"))) {
sadb_comb->sadb_comb_encrypt = SADB_X_EALG_AESCTR;
sadb_comb->sadb_comb_encrypt_minbits = 128+32;
sadb_comb->sadb_comb_encrypt_maxbits = 256+32;
} else if (!strncasecmp(ipsec_def_enc, "3des",
sizeof("3des"))) {
sadb_comb->sadb_comb_encrypt = SADB_EALG_3DESCBC;
sadb_comb->sadb_comb_encrypt_minbits = 192;
sadb_comb->sadb_comb_encrypt_maxbits = 192;
} else if (!strncasecmp(ipsec_def_enc, "blowfish",
sizeof("blowfish"))) {
sadb_comb->sadb_comb_encrypt = SADB_X_EALG_BLF;
sadb_comb->sadb_comb_encrypt_minbits = 40;
sadb_comb->sadb_comb_encrypt_maxbits = BLF_MAXKEYLEN * 8;
} else if (!strncasecmp(ipsec_def_enc, "cast128",
sizeof("cast128"))) {
sadb_comb->sadb_comb_encrypt = SADB_X_EALG_CAST;
sadb_comb->sadb_comb_encrypt_minbits = 40;
sadb_comb->sadb_comb_encrypt_maxbits = 128;
}
} else if (ipo->ipo_sproto == IPPROTO_IPCOMP) {
/* Set the compression algorithm */
if (!strncasecmp(ipsec_def_comp, "deflate",
sizeof("deflate"))) {
sadb_comb->sadb_comb_encrypt = SADB_X_CALG_DEFLATE;
sadb_comb->sadb_comb_encrypt_minbits = 0;
sadb_comb->sadb_comb_encrypt_maxbits = 0;
}
}
/* Set the authentication algorithm */
if (!strncasecmp(ipsec_def_auth, "hmac-sha1",
sizeof("hmac-sha1"))) {
sadb_comb->sadb_comb_auth = SADB_AALG_SHA1HMAC;
sadb_comb->sadb_comb_auth_minbits = 160;
sadb_comb->sadb_comb_auth_maxbits = 160;
} else if (!strncasecmp(ipsec_def_auth, "hmac-ripemd160",
sizeof("hmac_ripemd160"))) {
sadb_comb->sadb_comb_auth = SADB_X_AALG_RIPEMD160HMAC;
sadb_comb->sadb_comb_auth_minbits = 160;
sadb_comb->sadb_comb_auth_maxbits = 160;
} else if (!strncasecmp(ipsec_def_auth, "hmac-md5",
sizeof("hmac-md5"))) {
sadb_comb->sadb_comb_auth = SADB_AALG_MD5HMAC;
sadb_comb->sadb_comb_auth_minbits = 128;
sadb_comb->sadb_comb_auth_maxbits = 128;
} else if (!strncasecmp(ipsec_def_auth, "hmac-sha2-256",
sizeof("hmac-sha2-256"))) {
sadb_comb->sadb_comb_auth = SADB_X_AALG_SHA2_256;
sadb_comb->sadb_comb_auth_minbits = 256;
sadb_comb->sadb_comb_auth_maxbits = 256;
} else if (!strncasecmp(ipsec_def_auth, "hmac-sha2-384",
sizeof("hmac-sha2-384"))) {
sadb_comb->sadb_comb_auth = SADB_X_AALG_SHA2_384;
sadb_comb->sadb_comb_auth_minbits = 384;
sadb_comb->sadb_comb_auth_maxbits = 384;
} else if (!strncasecmp(ipsec_def_auth, "hmac-sha2-512",
sizeof("hmac-sha2-512"))) {
sadb_comb->sadb_comb_auth = SADB_X_AALG_SHA2_512;
sadb_comb->sadb_comb_auth_minbits = 512;
sadb_comb->sadb_comb_auth_maxbits = 512;
}
sadb_comb->sadb_comb_soft_allocations = ipsec_soft_allocations;
sadb_comb->sadb_comb_hard_allocations = ipsec_exp_allocations;
sadb_comb->sadb_comb_soft_bytes = ipsec_soft_bytes;
sadb_comb->sadb_comb_hard_bytes = ipsec_exp_bytes;
sadb_comb->sadb_comb_soft_addtime = ipsec_soft_timeout;
sadb_comb->sadb_comb_hard_addtime = ipsec_exp_timeout;
sadb_comb->sadb_comb_soft_usetime = ipsec_soft_first_use;
sadb_comb->sadb_comb_hard_usetime = ipsec_exp_first_use;
#endif
sadb_comb++;
}
/* Send the ACQUIRE message to all compliant registered listeners. */
if ((rval = pfkeyv2_sendmessage(headers,
PFKEYV2_SENDMESSAGE_REGISTERED, NULL, smsg->sadb_msg_satype, 0,
ipo->ipo_rdomain)) != 0)
goto ret;
rval = 0;
ret:
if (buffer != NULL) {
explicit_bzero(buffer, i);
free(buffer, M_PFKEY, i);
}
return (rval);
}
/*
* Notify key management that an expiration went off. The second argument
* specifies the type of expiration (soft or hard).
*/
int
pfkeyv2_expire(struct tdb *tdb, u_int16_t type)
{
void *p, *headers[SADB_EXT_MAX+1], *buffer = NULL;
struct sadb_msg *smsg;
int rval = 0;
int i;
NET_ASSERT_LOCKED();
switch (tdb->tdb_sproto) {
case IPPROTO_AH:
case IPPROTO_ESP:
case IPPROTO_IPIP:
case IPPROTO_IPCOMP:
#ifdef TCP_SIGNATURE
case IPPROTO_TCP:
#endif /* TCP_SIGNATURE */
break;
default:
rval = EOPNOTSUPP;
goto ret;
}
i = sizeof(struct sadb_msg) + sizeof(struct sadb_sa) +
2 * sizeof(struct sadb_lifetime) +
sizeof(struct sadb_address) + PADUP(tdb->tdb_src.sa.sa_len) +
sizeof(struct sadb_address) + PADUP(tdb->tdb_dst.sa.sa_len);
if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) {
rval = ENOMEM;
goto ret;
}
bzero(headers, sizeof(headers));
buffer = p;
headers[0] = p;
p += sizeof(struct sadb_msg);
smsg = (struct sadb_msg *) headers[0];
smsg->sadb_msg_version = PF_KEY_V2;
smsg->sadb_msg_type = SADB_EXPIRE;
smsg->sadb_msg_satype = tdb->tdb_satype;
smsg->sadb_msg_len = i / sizeof(uint64_t);
mtx_enter(&pfkeyv2_mtx);
smsg->sadb_msg_seq = pfkeyv2_seq++;
mtx_leave(&pfkeyv2_mtx);
headers[SADB_EXT_SA] = p;
export_sa(&p, tdb);
headers[SADB_EXT_LIFETIME_CURRENT] = p;
export_lifetime(&p, tdb, PFKEYV2_LIFETIME_CURRENT);
headers[type] = p;
export_lifetime(&p, tdb, type == SADB_EXT_LIFETIME_SOFT ?
PFKEYV2_LIFETIME_SOFT : PFKEYV2_LIFETIME_HARD);
headers[SADB_EXT_ADDRESS_SRC] = p;
export_address(&p, &tdb->tdb_src.sa);
headers[SADB_EXT_ADDRESS_DST] = p;
export_address(&p, &tdb->tdb_dst.sa);
if ((rval = pfkeyv2_sendmessage(headers, PFKEYV2_SENDMESSAGE_BROADCAST,
NULL, 0, 0, tdb->tdb_rdomain)) != 0)
goto ret;
/* XXX */
if (tdb->tdb_rdomain != tdb->tdb_rdomain_post)
if ((rval = pfkeyv2_sendmessage(headers,
PFKEYV2_SENDMESSAGE_BROADCAST, NULL, 0, 0,
tdb->tdb_rdomain_post)) != 0)
goto ret;
rval = 0;
ret:
if (buffer != NULL) {
explicit_bzero(buffer, i);
free(buffer, M_PFKEY, i);
}
return (rval);
}
struct pfkeyv2_sysctl_walk {
void *w_where;
size_t w_len;
int w_op;
u_int8_t w_satype;
};
int
pfkeyv2_sysctl_walker(struct tdb *tdb, void *arg, int last)
{
struct pfkeyv2_sysctl_walk *w = (struct pfkeyv2_sysctl_walk *)arg;
void *buffer = NULL;
int error = 0;
int usedlen, buflen, i;
if (w->w_satype != SADB_SATYPE_UNSPEC &&
w->w_satype != tdb->tdb_satype)
return (0);
if (w->w_where) {
void *headers[SADB_EXT_MAX+1];
struct sadb_msg msg;
bzero(headers, sizeof(headers));
if ((error = pfkeyv2_get(tdb, headers, &buffer, &buflen,
&usedlen)) != 0)
goto done;
if (w->w_len < sizeof(msg) + usedlen) {
error = ENOMEM;
goto done;
}
/* prepend header */
bzero(&msg, sizeof(msg));
msg.sadb_msg_version = PF_KEY_V2;
msg.sadb_msg_satype = tdb->tdb_satype;
msg.sadb_msg_type = SADB_DUMP;
msg.sadb_msg_len = (sizeof(msg) + usedlen) / sizeof(uint64_t);
if ((error = copyout(&msg, w->w_where, sizeof(msg))) != 0)
goto done;
w->w_where += sizeof(msg);
w->w_len -= sizeof(msg);
/* set extension type */
for (i = 1; i <= SADB_EXT_MAX; i++)
if (headers[i])
((struct sadb_ext *)
headers[i])->sadb_ext_type = i;
if ((error = copyout(buffer, w->w_where, usedlen)) != 0)
goto done;
w->w_where += usedlen;
w->w_len -= usedlen;
} else {
if ((error = pfkeyv2_get(tdb, NULL, NULL, &buflen, NULL)) != 0)
return (error);
w->w_len += buflen;
w->w_len += sizeof(struct sadb_msg);
}
done:
if (buffer != NULL) {
explicit_bzero(buffer, buflen);
free(buffer, M_PFKEY, buflen);
}
return (error);
}
int
pfkeyv2_dump_policy(struct ipsec_policy *ipo, void **headers, void **buffer,
int *lenp)
{
int i, rval, perm;
void *p;
/* Find how much space we need. */
i = 2 * sizeof(struct sadb_protocol);
/* We'll need four of them: src, src mask, dst, dst mask. */
switch (ipo->ipo_addr.sen_type) {
case SENT_IP4:
i += 4 * PADUP(sizeof(struct sockaddr_in));
i += 4 * sizeof(struct sadb_address);
break;
#ifdef INET6
case SENT_IP6:
i += 4 * PADUP(sizeof(struct sockaddr_in6));
i += 4 * sizeof(struct sadb_address);
break;
#endif /* INET6 */
default:
return (EINVAL);
}
/* Local address, might be zeroed. */
switch (ipo->ipo_src.sa.sa_family) {
case 0:
break;
case AF_INET:
i += PADUP(sizeof(struct sockaddr_in));
i += sizeof(struct sadb_address);
break;
#ifdef INET6
case AF_INET6:
i += PADUP(sizeof(struct sockaddr_in6));
i += sizeof(struct sadb_address);
break;
#endif /* INET6 */
default:
return (EINVAL);
}
/* Remote address, might be zeroed. XXX ??? */
switch (ipo->ipo_dst.sa.sa_family) {
case 0:
break;
case AF_INET:
i += PADUP(sizeof(struct sockaddr_in));
i += sizeof(struct sadb_address);
break;
#ifdef INET6
case AF_INET6:
i += PADUP(sizeof(struct sockaddr_in6));
i += sizeof(struct sadb_address);
break;
#endif /* INET6 */
default:
return (EINVAL);
}
if (ipo->ipo_ids) {
i += sizeof(struct sadb_ident) + PADUP(ipo->ipo_ids->id_local->len);
i += sizeof(struct sadb_ident) + PADUP(ipo->ipo_ids->id_remote->len);
}
if (lenp)
*lenp = i;
if (buffer == NULL) {
rval = 0;
goto ret;
}
if (!(p = malloc(i, M_PFKEY, M_NOWAIT | M_ZERO))) {
rval = ENOMEM;
goto ret;
} else
*buffer = p;
/* Local address. */
if (ipo->ipo_src.sa.sa_family) {
headers[SADB_EXT_ADDRESS_SRC] = p;
export_address(&p, &ipo->ipo_src.sa);
}
/* Remote address. */
if (ipo->ipo_dst.sa.sa_family) {
headers[SADB_EXT_ADDRESS_DST] = p;
export_address(&p, &ipo->ipo_dst.sa);
}
/* Get actual flow. */
export_flow(&p, ipo->ipo_type, &ipo->ipo_addr, &ipo->ipo_mask,
headers);
/* Add ids only when we are root. */
perm = suser(curproc);
if (perm == 0 && ipo->ipo_ids)
export_identities(&p, ipo->ipo_ids, 0, headers);
rval = 0;
ret:
return (rval);
}
int
pfkeyv2_sysctl_policydumper(struct ipsec_policy *ipo, void *arg,
unsigned int tableid)
{
struct pfkeyv2_sysctl_walk *w = (struct pfkeyv2_sysctl_walk *)arg;
void *buffer = NULL;
int i, buflen, error = 0;
if (w->w_where) {
void *headers[SADB_EXT_MAX + 1];
struct sadb_msg msg;
bzero(headers, sizeof(headers));
if ((error = pfkeyv2_dump_policy(ipo, headers, &buffer,
&buflen)) != 0)
goto done;
if (w->w_len < buflen) {
error = ENOMEM;
goto done;
}
/* prepend header */
bzero(&msg, sizeof(msg));
msg.sadb_msg_version = PF_KEY_V2;
if (ipo->ipo_sproto == IPPROTO_ESP)
msg.sadb_msg_satype = SADB_SATYPE_ESP;
else if (ipo->ipo_sproto == IPPROTO_AH)
msg.sadb_msg_satype = SADB_SATYPE_AH;
else if (ipo->ipo_sproto == IPPROTO_IPCOMP)
msg.sadb_msg_satype = SADB_X_SATYPE_IPCOMP;
else if (ipo->ipo_sproto == IPPROTO_IPIP)
msg.sadb_msg_satype = SADB_X_SATYPE_IPIP;
msg.sadb_msg_type = SADB_X_SPDDUMP;
msg.sadb_msg_len = (sizeof(msg) + buflen) / sizeof(uint64_t);
if ((error = copyout(&msg, w->w_where, sizeof(msg))) != 0)
goto done;
w->w_where += sizeof(msg);
w->w_len -= sizeof(msg);
/* set extension type */
for (i = 1; i <= SADB_EXT_MAX; i++)
if (headers[i])
((struct sadb_ext *)
headers[i])->sadb_ext_type = i;
if ((error = copyout(buffer, w->w_where, buflen)) != 0)
goto done;
w->w_where += buflen;
w->w_len -= buflen;
} else {
if ((error = pfkeyv2_dump_policy(ipo, NULL, NULL,
&buflen)) != 0)
goto done;
w->w_len += buflen;
w->w_len += sizeof(struct sadb_msg);
}
done:
if (buffer)
free(buffer, M_PFKEY, buflen);
return (error);
}
int
pfkeyv2_policy_flush(struct ipsec_policy *ipo, void *arg, unsigned int tableid)
{
int error;
error = ipsec_delete_policy(ipo);
if (error == 0)
error = EAGAIN;
return (error);
}
int
pfkeyv2_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp,
void *new, size_t newlen)
{
struct pfkeyv2_sysctl_walk w;
int error = EINVAL;
u_int rdomain;
u_int tableid;
if (new)
return (EPERM);
if (namelen < 1)
return (EINVAL);
w.w_op = name[0];
w.w_satype = name[1];
w.w_where = oldp;
w.w_len = oldp ? *oldlenp : 0;
if (namelen == 3) {
tableid = name[2];
if (!rtable_exists(tableid))
return (ENOENT);
} else
tableid = curproc->p_p->ps_rtableid;
rdomain = rtable_l2(tableid);
switch(w.w_op) {
case NET_KEY_SADB_DUMP:
if ((error = suser(curproc)) != 0)
return (error);
NET_LOCK();
error = tdb_walk(rdomain, pfkeyv2_sysctl_walker, &w);
NET_UNLOCK();
if (oldp)
*oldlenp = w.w_where - oldp;
else
*oldlenp = w.w_len;
break;
case NET_KEY_SPD_DUMP:
NET_LOCK_SHARED();
error = spd_table_walk(rdomain,
pfkeyv2_sysctl_policydumper, &w);
NET_UNLOCK_SHARED();
if (oldp)
*oldlenp = w.w_where - oldp;
else
*oldlenp = w.w_len;
break;
}
return (error);
}
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