/*
- * Copyright (c) 2008 Apple Inc. All rights reserved.
+ * Copyright (c) 2008-2016 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
+ *
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
- *
+ *
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
+ *
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
- *
+ *
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
+#include <sys/mcache.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/syslog.h>
#include <net/if.h>
+#include <net/if_ipsec.h>
#include <net/route.h>
#include <kern/cpu_number.h>
#include <kern/locks.h>
#include <netinet/kpi_ipfilter_var.h>
#include <net/net_osdep.h>
+#include <mach/sdt.h>
+#include <corecrypto/cc.h>
#include <sys/kdebug.h>
#define DBG_LAYER_BEG NETDBG_CODE(DBG_NETIPSEC, 1)
extern lck_mtx_t *sadb_mutex;
#if INET
-extern struct protosw inetsw[];
-
#define ESPMAXLEN \
(sizeof(struct esp) < sizeof(struct newesp) \
? sizeof(struct newesp) : sizeof(struct esp))
+static struct ip *
+esp4_input_strip_udp_encap (struct mbuf *m, int iphlen)
+{
+ // strip the udp header that's encapsulating ESP
+ struct ip *ip;
+ size_t stripsiz = sizeof(struct udphdr);
+
+ ip = mtod(m, __typeof__(ip));
+ ovbcopy((caddr_t)ip, (caddr_t)(((u_char *)ip) + stripsiz), iphlen);
+ m->m_data += stripsiz;
+ m->m_len -= stripsiz;
+ m->m_pkthdr.len -= stripsiz;
+ ip = mtod(m, __typeof__(ip));
+ ip->ip_len = ip->ip_len - stripsiz;
+ ip->ip_p = IPPROTO_ESP;
+ return ip;
+}
+
+static struct ip6_hdr *
+esp6_input_strip_udp_encap (struct mbuf *m, int ip6hlen)
+{
+ // strip the udp header that's encapsulating ESP
+ struct ip6_hdr *ip6;
+ size_t stripsiz = sizeof(struct udphdr);
+
+ ip6 = mtod(m, __typeof__(ip6));
+ ovbcopy((caddr_t)ip6, (caddr_t)(((u_char *)ip6) + stripsiz), ip6hlen);
+ m->m_data += stripsiz;
+ m->m_len -= stripsiz;
+ m->m_pkthdr.len -= stripsiz;
+ ip6 = mtod(m, __typeof__(ip6));
+ ip6->ip6_plen = htons(ntohs(ip6->ip6_plen) - stripsiz);
+ ip6->ip6_nxt = IPPROTO_ESP;
+ return ip6;
+}
+
void
-esp4_input(m, off)
- struct mbuf *m;
- int off;
+esp4_input(struct mbuf *m, int off)
+{
+ (void)esp4_input_extended(m, off, NULL);
+}
+
+struct mbuf *
+esp4_input_extended(struct mbuf *m, int off, ifnet_t interface)
{
struct ip *ip;
+#if INET6
struct ip6_hdr *ip6;
+#endif /* INET6 */
struct esp *esp;
struct esptail esptail;
u_int32_t spi;
+ u_int32_t seq;
struct secasvar *sav = NULL;
size_t taillen;
u_int16_t nxt;
size_t hlen;
size_t esplen;
sa_family_t ifamily;
+ struct mbuf *out_m = NULL;
KERNEL_DEBUG(DBG_FNC_ESPIN | DBG_FUNC_START, 0,0,0,0,0);
/* sanity check for alignment. */
}
}
+ m->m_pkthdr.csum_flags &= ~CSUM_RX_FLAGS;
+
+ /* Expect 32-bit aligned data pointer on strict-align platforms */
+ MBUF_STRICT_DATA_ALIGNMENT_CHECK_32(m);
+
ip = mtod(m, struct ip *);
- esp = (struct esp *)(((u_int8_t *)ip) + off);
+ // expect udp-encap and esp packets only
+ if (ip->ip_p != IPPROTO_ESP &&
+ !(ip->ip_p == IPPROTO_UDP && off >= sizeof(struct udphdr))) {
+ ipseclog((LOG_DEBUG,
+ "IPv4 ESP input: invalid protocol type\n"));
+ IPSEC_STAT_INCREMENT(ipsecstat.in_inval);
+ goto bad;
+ }
+ esp = (struct esp *)(void *)(((u_int8_t *)ip) + off);
#ifdef _IP_VHL
hlen = IP_VHL_HL(ip->ip_vhl) << 2;
#else
/* find the sassoc. */
spi = esp->esp_spi;
- if ((sav = key_allocsa(AF_INET,
- (caddr_t)&ip->ip_src, (caddr_t)&ip->ip_dst,
- IPPROTO_ESP, spi)) == 0) {
+ if ((sav = key_allocsa_extended(AF_INET,
+ (caddr_t)&ip->ip_src, (caddr_t)&ip->ip_dst,
+ IPPROTO_ESP, spi, interface)) == 0) {
ipseclog((LOG_WARNING,
"IPv4 ESP input: no key association found for spi %u\n",
(u_int32_t)ntohl(spi)));
goto bad;
}
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
- printf("DP esp4_input called to allocate SA:%p\n", sav));
+ printf("DP esp4_input called to allocate SA:0x%llx\n",
+ (uint64_t)VM_KERNEL_ADDRPERM(sav)));
if (sav->state != SADB_SASTATE_MATURE
&& sav->state != SADB_SASTATE_DYING) {
ipseclog((LOG_DEBUG,
goto bad;
}
+ seq = ntohl(((struct newesp *)esp)->esp_seq);
+
+ /* Save ICV from packet for verification later */
+ size_t siz = 0;
+ unsigned char saved_icv[AH_MAXSUMSIZE];
+ if (algo->finalizedecrypt) {
+ siz = algo->icvlen;
+ m_copydata(m, m->m_pkthdr.len - siz, siz, (caddr_t) saved_icv);
+ goto delay_icv;
+ }
+
if (!((sav->flags & SADB_X_EXT_OLD) == 0 && sav->replay
&& (sav->alg_auth && sav->key_auth)))
goto noreplaycheck;
/*
* check for sequence number.
*/
- if (ipsec_chkreplay(ntohl(((struct newesp *)esp)->esp_seq), sav))
+ if (ipsec_chkreplay(seq, sav))
; /*okey*/
else {
IPSEC_STAT_INCREMENT(ipsecstat.in_espreplay);
/* check ICV */
{
- u_char sum0[AH_MAXSUMSIZE];
- u_char sum[AH_MAXSUMSIZE];
+ u_char sum0[AH_MAXSUMSIZE] __attribute__((aligned(4)));
+ u_char sum[AH_MAXSUMSIZE] __attribute__((aligned(4)));
const struct ah_algorithm *sumalgo;
- size_t siz;
sumalgo = ah_algorithm_lookup(sav->alg_auth);
if (!sumalgo)
goto bad;
}
- if (bcmp(sum0, sum, siz) != 0) {
- ipseclog((LOG_WARNING, "auth fail in IPv4 ESP input: %s %s\n",
+ if (cc_cmp_safe(siz, sum0, sum)) {
+ ipseclog((LOG_WARNING, "cc_cmp fail in IPv4 ESP input: %s %s\n",
ipsec4_logpacketstr(ip, spi), ipsec_logsastr(sav)));
IPSEC_STAT_INCREMENT(ipsecstat.in_espauthfail);
goto bad;
}
+delay_icv:
+
/* strip off the authentication data */
m_adj(m, -siz);
ip = mtod(m, struct ip *);
* update sequence number.
*/
if ((sav->flags & SADB_X_EXT_OLD) == 0 && sav->replay) {
- if (ipsec_updatereplay(ntohl(((struct newesp *)esp)->esp_seq), sav)) {
+ if (ipsec_updatereplay(seq, sav)) {
IPSEC_STAT_INCREMENT(ipsecstat.in_espreplay);
goto bad;
}
m->m_flags |= M_DECRYPTED;
+ if (algo->finalizedecrypt)
+ {
+ if ((*algo->finalizedecrypt)(sav, saved_icv, algo->icvlen)) {
+ ipseclog((LOG_ERR, "packet decryption ICV failure\n"));
+ IPSEC_STAT_INCREMENT(ipsecstat.in_inval);
+ KERNEL_DEBUG(DBG_FNC_DECRYPT | DBG_FUNC_END, 1,0,0,0,0);
+ goto bad;
+ }
+ }
+
/*
* find the trailer of the ESP.
*/
#else
ip->ip_len = htons(ntohs(ip->ip_len) - taillen);
#endif
+ if (ip->ip_p == IPPROTO_UDP) {
+ // offset includes the outer ip and udp header lengths.
+ if (m->m_len < off) {
+ m = m_pullup(m, off);
+ if (!m) {
+ ipseclog((LOG_DEBUG,
+ "IPv4 ESP input: invalid udp encapsulated ESP packet length \n"));
+ IPSEC_STAT_INCREMENT(ipsecstat.in_inval);
+ goto bad;
+ }
+ }
+
+ // check the UDP encap header to detect changes in the source port, and then strip the header
+ off -= sizeof(struct udphdr); // off no longer includes the udphdr's size
+ // if peer is behind nat and this is the latest esp packet
+ if ((sav->flags & SADB_X_EXT_NATT_DETECTED_PEER) != 0 &&
+ (sav->flags & SADB_X_EXT_OLD) == 0 &&
+ seq && sav->replay &&
+ seq >= sav->replay->lastseq) {
+ struct udphdr *encap_uh = (__typeof__(encap_uh))(void *)((caddr_t)ip + off);
+ if (encap_uh->uh_sport &&
+ ntohs(encap_uh->uh_sport) != sav->remote_ike_port) {
+ sav->remote_ike_port = ntohs(encap_uh->uh_sport);
+ }
+ }
+ ip = esp4_input_strip_udp_encap(m, off);
+ esp = (struct esp *)(void *)(((u_int8_t *)ip) + off);
+ }
/* was it transmitted over the IPsec tunnel SA? */
if (ipsec4_tunnel_validate(m, off + esplen + ivlen, nxt, sav, &ifamily)) {
+ ifaddr_t ifa;
+ struct sockaddr_storage addr;
+
/*
* strip off all the headers that precedes ESP header.
* IP4 xx ESP IP4' payload -> IP4' payload
* XXX more sanity checks
* XXX relationship with gif?
*/
- u_int8_t tos;
+ u_int8_t tos, otos;
+ int sum;
tos = ip->ip_tos;
m_adj(m, off + esplen + ivlen);
if (ifamily == AF_INET) {
+ struct sockaddr_in *ipaddr;
+
if (m->m_len < sizeof(*ip)) {
m = m_pullup(m, sizeof(*ip));
if (!m) {
}
ip = mtod(m, struct ip *);
/* ECN consideration. */
- ip_ecn_egress(ip4_ipsec_ecn, &tos, &ip->ip_tos);
+
+ otos = ip->ip_tos;
+ if (ip_ecn_egress(ip4_ipsec_ecn, &tos, &ip->ip_tos) == 0) {
+ IPSEC_STAT_INCREMENT(ipsecstat.in_inval);
+ goto bad;
+ }
+
+ if (otos != ip->ip_tos) {
+ sum = ~ntohs(ip->ip_sum) & 0xffff;
+ sum += (~otos & 0xffff) + ip->ip_tos;
+ sum = (sum >> 16) + (sum & 0xffff);
+ sum += (sum >> 16); /* add carry */
+ ip->ip_sum = htons(~sum & 0xffff);
+ }
+
if (!key_checktunnelsanity(sav, AF_INET,
(caddr_t)&ip->ip_src, (caddr_t)&ip->ip_dst)) {
ipseclog((LOG_ERR, "ipsec tunnel address mismatch "
IPSEC_STAT_INCREMENT(ipsecstat.in_inval);
goto bad;
}
+
+ bzero(&addr, sizeof(addr));
+ ipaddr = (__typeof__(ipaddr))&addr;
+ ipaddr->sin_family = AF_INET;
+ ipaddr->sin_len = sizeof(*ipaddr);
+ ipaddr->sin_addr = ip->ip_dst;
#if INET6
} else if (ifamily == AF_INET6) {
-#ifndef PULLDOWN_TEST
+ struct sockaddr_in6 *ip6addr;
+
/*
* m_pullup is prohibited in KAME IPv6 input processing
* but there's no other way!
*/
-#else
- /* okay to pullup in m_pulldown style */
-#endif
if (m->m_len < sizeof(*ip6)) {
m = m_pullup(m, sizeof(*ip6));
if (!m) {
}
}
+ /*
+ * Expect 32-bit aligned data pointer on strict-align
+ * platforms.
+ */
+ MBUF_STRICT_DATA_ALIGNMENT_CHECK_32(m);
+
ip6 = mtod(m, struct ip6_hdr *);
/* ECN consideration. */
- /* XXX To be fixed later if needed */
- // ip_ecn_egress(ip4_ipsec_ecn, &tos, &ip->ip_tos);
+ if (ip64_ecn_egress(ip4_ipsec_ecn, &tos, &ip6->ip6_flow) == 0) {
+ IPSEC_STAT_INCREMENT(ipsecstat.in_inval);
+ goto bad;
+ }
if (!key_checktunnelsanity(sav, AF_INET6,
(caddr_t)&ip6->ip6_src, (caddr_t)&ip6->ip6_dst)) {
ipsec6_logpacketstr(ip6, spi), ipsec_logsastr(sav)));
IPSEC_STAT_INCREMENT(ipsecstat.in_inval);
goto bad;
- }
+ }
+
+ bzero(&addr, sizeof(addr));
+ ip6addr = (__typeof__(ip6addr))&addr;
+ ip6addr->sin6_family = AF_INET6;
+ ip6addr->sin6_len = sizeof(*ip6addr);
+ ip6addr->sin6_addr = ip6->ip6_dst;
#endif /* INET6 */
} else {
ipseclog((LOG_ERR, "ipsec tunnel unsupported address family "
IPSEC_STAT_INCREMENT(ipsecstat.in_nomem);
goto bad;
}
-
+
+ // update the receiving interface address based on the inner address
+ ifa = ifa_ifwithaddr((struct sockaddr *)&addr);
+ if (ifa) {
+ m->m_pkthdr.rcvif = ifa->ifa_ifp;
+ IFA_REMREF(ifa);
+ }
+
/* Clear the csum flags, they can't be valid for the inner headers */
m->m_pkthdr.csum_flags = 0;
- proto_input(ifamily == AF_INET ? PF_INET : PF_INET6, m);
+
+ // Input via IPSec interface
+ if (sav->sah->ipsec_if != NULL) {
+ // Return mbuf
+ if (interface != NULL &&
+ interface == sav->sah->ipsec_if) {
+ out_m = m;
+ goto done;
+ }
+
+ if (ipsec_inject_inbound_packet(sav->sah->ipsec_if, m) == 0) {
+ m = NULL;
+ goto done;
+ } else {
+ goto bad;
+ }
+ }
+
+ if (proto_input(ifamily == AF_INET ? PF_INET : PF_INET6, m) != 0)
+ goto bad;
+
nxt = IPPROTO_DONE;
KERNEL_DEBUG(DBG_FNC_ESPIN | DBG_FUNC_END, 2,0,0,0,0);
} else {
if (nxt == IPPROTO_TCP || nxt == IPPROTO_UDP) {
m->m_pkthdr.csum_flags = CSUM_DATA_VALID | CSUM_PSEUDO_HDR;
m->m_pkthdr.csum_data = 0xFFFF;
+ _CASSERT(offsetof(struct pkthdr, csum_data) == offsetof(struct pkthdr, csum_rx_val));
}
if (nxt != IPPROTO_DONE) {
}
ip = mtod(m, struct ip *);
}
- udp = (struct udphdr *)(((u_int8_t *)ip) + off);
+ udp = (struct udphdr *)(void *)(((u_int8_t *)ip) + off);
lck_mtx_lock(sadb_mutex);
if (sav->natt_encapsulated_src_port == 0) {
udp->uh_sport = htons(sav->remote_ike_port);
udp->uh_sum = 0;
}
+
+ DTRACE_IP6(receive, struct mbuf *, m, struct inpcb *, NULL,
+ struct ip *, ip, struct ifnet *, m->m_pkthdr.rcvif,
+ struct ip *, ip, struct ip6_hdr *, NULL);
+
+ // Input via IPsec interface legacy path
+ if (sav->sah->ipsec_if != NULL) {
+ int mlen;
+ if ((mlen = m_length2(m, NULL)) < hlen) {
+ ipseclog((LOG_DEBUG,
+ "IPv4 ESP input: decrypted packet too short %d < %d\n",
+ mlen, hlen));
+ IPSEC_STAT_INCREMENT(ipsecstat.in_inval);
+ goto bad;
+ }
+ ip->ip_len = htons(ip->ip_len + hlen);
+ ip->ip_off = htons(ip->ip_off);
+ ip->ip_sum = 0;
+ ip->ip_sum = ip_cksum_hdr_in(m, hlen);
+
+ // Return mbuf
+ if (interface != NULL &&
+ interface == sav->sah->ipsec_if) {
+ out_m = m;
+ goto done;
+ }
+
+ if (ipsec_inject_inbound_packet(sav->sah->ipsec_if, m) == 0) {
+ m = NULL;
+ goto done;
+ } else {
+ goto bad;
+ }
+ }
+
ip_proto_dispatch_in(m, off, nxt, 0);
- } else
+ } else {
m_freem(m);
+ }
m = NULL;
}
+done:
if (sav) {
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
- printf("DP esp4_input call free SA:%p\n", sav));
+ printf("DP esp4_input call free SA:0x%llx\n",
+ (uint64_t)VM_KERNEL_ADDRPERM(sav)));
key_freesav(sav, KEY_SADB_UNLOCKED);
}
IPSEC_STAT_INCREMENT(ipsecstat.in_success);
- return;
-
+ return out_m;
bad:
if (sav) {
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
- printf("DP esp4_input call free SA:%p\n", sav));
+ printf("DP esp4_input call free SA:0x%llx\n",
+ (uint64_t)VM_KERNEL_ADDRPERM(sav)));
key_freesav(sav, KEY_SADB_UNLOCKED);
}
- if (m)
+ if (m) {
m_freem(m);
+ }
KERNEL_DEBUG(DBG_FNC_ESPIN | DBG_FUNC_END, 4,0,0,0,0);
- return;
+ return out_m;
}
#endif /* INET */
#if INET6
+
+int
+esp6_input(struct mbuf **mp, int *offp, int proto)
+{
+ return esp6_input_extended(mp, offp, proto, NULL);
+}
+
int
-esp6_input(mp, offp)
- struct mbuf **mp;
- int *offp;
+esp6_input_extended(struct mbuf **mp, int *offp, int proto, ifnet_t interface)
{
+#pragma unused(proto)
struct mbuf *m = *mp;
int off = *offp;
+ struct ip *ip;
struct ip6_hdr *ip6;
struct esp *esp;
struct esptail esptail;
u_int32_t spi;
+ u_int32_t seq;
struct secasvar *sav = NULL;
size_t taillen;
u_int16_t nxt;
+ char *nproto;
const struct esp_algorithm *algo;
int ivlen;
size_t esplen;
+ sa_family_t ifamily;
/* sanity check for alignment. */
if (off % 4 != 0 || m->m_pkthdr.len % 4 != 0) {
#ifndef PULLDOWN_TEST
IP6_EXTHDR_CHECK(m, off, ESPMAXLEN, {return IPPROTO_DONE;});
- esp = (struct esp *)(mtod(m, caddr_t) + off);
+ esp = (struct esp *)(void *)(mtod(m, caddr_t) + off);
#else
IP6_EXTHDR_GET(esp, struct esp *, m, off, ESPMAXLEN);
if (esp == NULL) {
return IPPROTO_DONE;
}
#endif
+ m->m_pkthdr.csum_flags &= ~CSUM_RX_FLAGS;
+
+ /* Expect 32-bit data aligned pointer on strict-align platforms */
+ MBUF_STRICT_DATA_ALIGNMENT_CHECK_32(m);
+
ip6 = mtod(m, struct ip6_hdr *);
if (ntohs(ip6->ip6_plen) == 0) {
goto bad;
}
+ nproto = ip6_get_prevhdr(m, off);
+ if (nproto == NULL || (*nproto != IPPROTO_ESP &&
+ !(*nproto == IPPROTO_UDP && off >= sizeof(struct udphdr)))) {
+ ipseclog((LOG_DEBUG, "IPv6 ESP input: invalid protocol type\n"));
+ IPSEC_STAT_INCREMENT(ipsec6stat.in_inval);
+ goto bad;
+ }
+
/* find the sassoc. */
spi = esp->esp_spi;
- if ((sav = key_allocsa(AF_INET6,
- (caddr_t)&ip6->ip6_src, (caddr_t)&ip6->ip6_dst,
- IPPROTO_ESP, spi)) == 0) {
+ if ((sav = key_allocsa_extended(AF_INET6,
+ (caddr_t)&ip6->ip6_src, (caddr_t)&ip6->ip6_dst,
+ IPPROTO_ESP, spi, interface)) == 0) {
ipseclog((LOG_WARNING,
"IPv6 ESP input: no key association found for spi %u\n",
(u_int32_t)ntohl(spi)));
goto bad;
}
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
- printf("DP esp6_input called to allocate SA:%p\n", sav));
+ printf("DP esp6_input called to allocate SA:0x%llx\n",
+ (uint64_t)VM_KERNEL_ADDRPERM(sav)));
if (sav->state != SADB_SASTATE_MATURE
&& sav->state != SADB_SASTATE_DYING) {
ipseclog((LOG_DEBUG,
goto bad;
}
+ seq = ntohl(((struct newesp *)esp)->esp_seq);
+
+ /* Save ICV from packet for verification later */
+ size_t siz = 0;
+ unsigned char saved_icv[AH_MAXSUMSIZE];
+ if (algo->finalizedecrypt) {
+ siz = algo->icvlen;
+ m_copydata(m, m->m_pkthdr.len - siz, siz, (caddr_t) saved_icv);
+ goto delay_icv;
+ }
+
if (!((sav->flags & SADB_X_EXT_OLD) == 0 && sav->replay
&& (sav->alg_auth && sav->key_auth)))
goto noreplaycheck;
/*
* check for sequence number.
*/
- if (ipsec_chkreplay(ntohl(((struct newesp *)esp)->esp_seq), sav))
+ if (ipsec_chkreplay(seq, sav))
; /*okey*/
else {
IPSEC_STAT_INCREMENT(ipsec6stat.in_espreplay);
/* check ICV */
{
- u_char sum0[AH_MAXSUMSIZE];
- u_char sum[AH_MAXSUMSIZE];
+ u_char sum0[AH_MAXSUMSIZE] __attribute__((aligned(4)));
+ u_char sum[AH_MAXSUMSIZE] __attribute__((aligned(4)));
const struct ah_algorithm *sumalgo;
- size_t siz;
sumalgo = ah_algorithm_lookup(sav->alg_auth);
if (!sumalgo)
goto bad;
}
- if (bcmp(sum0, sum, siz) != 0) {
+ if (cc_cmp_safe(siz, sum0, sum)) {
ipseclog((LOG_WARNING, "auth fail in IPv6 ESP input: %s %s\n",
ipsec6_logpacketstr(ip6, spi), ipsec_logsastr(sav)));
IPSEC_STAT_INCREMENT(ipsec6stat.in_espauthfail);
goto bad;
}
+delay_icv:
+
/* strip off the authentication data */
m_adj(m, -siz);
ip6 = mtod(m, struct ip6_hdr *);
* update sequence number.
*/
if ((sav->flags & SADB_X_EXT_OLD) == 0 && sav->replay) {
- if (ipsec_updatereplay(ntohl(((struct newesp *)esp)->esp_seq), sav)) {
+ if (ipsec_updatereplay(seq, sav)) {
IPSEC_STAT_INCREMENT(ipsec6stat.in_espreplay);
goto bad;
}
m->m_flags |= M_DECRYPTED;
+ if (algo->finalizedecrypt)
+ {
+ if ((*algo->finalizedecrypt)(sav, saved_icv, algo->icvlen)) {
+ ipseclog((LOG_ERR, "packet decryption ICV failure\n"));
+ IPSEC_STAT_INCREMENT(ipsecstat.in_inval);
+ KERNEL_DEBUG(DBG_FNC_DECRYPT | DBG_FUNC_END, 1,0,0,0,0);
+ goto bad;
+ }
+ }
+
/*
* find the trailer of the ESP.
*/
ip6 = mtod(m, struct ip6_hdr *);
ip6->ip6_plen = htons(ntohs(ip6->ip6_plen) - taillen);
+ if (*nproto == IPPROTO_UDP) {
+ // offset includes the outer ip and udp header lengths.
+ if (m->m_len < off) {
+ m = m_pullup(m, off);
+ if (!m) {
+ ipseclog((LOG_DEBUG,
+ "IPv6 ESP input: invalid udp encapsulated ESP packet length\n"));
+ IPSEC_STAT_INCREMENT(ipsec6stat.in_inval);
+ goto bad;
+ }
+ }
+
+ // check the UDP encap header to detect changes in the source port, and then strip the header
+ off -= sizeof(struct udphdr); // off no longer includes the udphdr's size
+ // if peer is behind nat and this is the latest esp packet
+ if ((sav->flags & SADB_X_EXT_NATT_DETECTED_PEER) != 0 &&
+ (sav->flags & SADB_X_EXT_OLD) == 0 &&
+ seq && sav->replay &&
+ seq >= sav->replay->lastseq) {
+ struct udphdr *encap_uh = (__typeof__(encap_uh))(void *)((caddr_t)ip6 + off);
+ if (encap_uh->uh_sport &&
+ ntohs(encap_uh->uh_sport) != sav->remote_ike_port) {
+ sav->remote_ike_port = ntohs(encap_uh->uh_sport);
+ }
+ }
+ ip6 = esp6_input_strip_udp_encap(m, off);
+ esp = (struct esp *)(void *)(((u_int8_t *)ip6) + off);
+ }
+
+
/* was it transmitted over the IPsec tunnel SA? */
- if (ipsec6_tunnel_validate(m, off + esplen + ivlen, nxt, sav)) {
+ if (ipsec6_tunnel_validate(m, off + esplen + ivlen, nxt, sav, &ifamily)) {
+ ifaddr_t ifa;
+ struct sockaddr_storage addr;
+
/*
* strip off all the headers that precedes ESP header.
* IP6 xx ESP IP6' payload -> IP6' payload
u_int32_t flowinfo; /*net endian*/
flowinfo = ip6->ip6_flow;
m_adj(m, off + esplen + ivlen);
- if (m->m_len < sizeof(*ip6)) {
+ if (ifamily == AF_INET6) {
+ struct sockaddr_in6 *ip6addr;
+
+ if (m->m_len < sizeof(*ip6)) {
#ifndef PULLDOWN_TEST
- /*
- * m_pullup is prohibited in KAME IPv6 input processing
- * but there's no other way!
- */
+ /*
+ * m_pullup is prohibited in KAME IPv6 input processing
+ * but there's no other way!
+ */
#else
- /* okay to pullup in m_pulldown style */
+ /* okay to pullup in m_pulldown style */
#endif
- m = m_pullup(m, sizeof(*ip6));
- if (!m) {
+ m = m_pullup(m, sizeof(*ip6));
+ if (!m) {
+ IPSEC_STAT_INCREMENT(ipsec6stat.in_inval);
+ goto bad;
+ }
+ }
+ ip6 = mtod(m, struct ip6_hdr *);
+ /* ECN consideration. */
+ if (ip6_ecn_egress(ip6_ipsec_ecn, &flowinfo, &ip6->ip6_flow) == 0) {
IPSEC_STAT_INCREMENT(ipsec6stat.in_inval);
goto bad;
}
- }
- ip6 = mtod(m, struct ip6_hdr *);
- /* ECN consideration. */
- ip6_ecn_egress(ip6_ipsec_ecn, &flowinfo, &ip6->ip6_flow);
- if (!key_checktunnelsanity(sav, AF_INET6,
- (caddr_t)&ip6->ip6_src, (caddr_t)&ip6->ip6_dst)) {
- ipseclog((LOG_ERR, "ipsec tunnel address mismatch "
- "in IPv6 ESP input: %s %s\n",
- ipsec6_logpacketstr(ip6, spi),
- ipsec_logsastr(sav)));
- IPSEC_STAT_INCREMENT(ipsec6stat.in_inval);
- goto bad;
+ if (!key_checktunnelsanity(sav, AF_INET6,
+ (caddr_t)&ip6->ip6_src, (caddr_t)&ip6->ip6_dst)) {
+ ipseclog((LOG_ERR, "ipsec tunnel address mismatch "
+ "in IPv6 ESP input: %s %s\n",
+ ipsec6_logpacketstr(ip6, spi),
+ ipsec_logsastr(sav)));
+ IPSEC_STAT_INCREMENT(ipsec6stat.in_inval);
+ goto bad;
+ }
+
+ bzero(&addr, sizeof(addr));
+ ip6addr = (__typeof__(ip6addr))&addr;
+ ip6addr->sin6_family = AF_INET6;
+ ip6addr->sin6_len = sizeof(*ip6addr);
+ ip6addr->sin6_addr = ip6->ip6_dst;
+ } else if (ifamily == AF_INET) {
+ struct sockaddr_in *ipaddr;
+
+ if (m->m_len < sizeof(*ip)) {
+ m = m_pullup(m, sizeof(*ip));
+ if (!m) {
+ IPSEC_STAT_INCREMENT(ipsecstat.in_inval);
+ goto bad;
+ }
+ }
+
+ u_int8_t otos;
+ int sum;
+
+ ip = mtod(m, struct ip *);
+ otos = ip->ip_tos;
+ /* ECN consideration. */
+ if (ip46_ecn_egress(ip6_ipsec_ecn, &flowinfo, &ip->ip_tos) == 0) {
+ IPSEC_STAT_INCREMENT(ipsecstat.in_inval);
+ goto bad;
+ }
+
+ if (otos != ip->ip_tos) {
+ sum = ~ntohs(ip->ip_sum) & 0xffff;
+ sum += (~otos & 0xffff) + ip->ip_tos;
+ sum = (sum >> 16) + (sum & 0xffff);
+ sum += (sum >> 16); /* add carry */
+ ip->ip_sum = htons(~sum & 0xffff);
+ }
+
+ if (!key_checktunnelsanity(sav, AF_INET,
+ (caddr_t)&ip->ip_src, (caddr_t)&ip->ip_dst)) {
+ ipseclog((LOG_ERR, "ipsec tunnel address mismatch "
+ "in ESP input: %s %s\n",
+ ipsec4_logpacketstr(ip, spi), ipsec_logsastr(sav)));
+ IPSEC_STAT_INCREMENT(ipsecstat.in_inval);
+ goto bad;
+ }
+
+ bzero(&addr, sizeof(addr));
+ ipaddr = (__typeof__(ipaddr))&addr;
+ ipaddr->sin_family = AF_INET;
+ ipaddr->sin_len = sizeof(*ipaddr);
+ ipaddr->sin_addr = ip->ip_dst;
}
key_sa_recordxfer(sav, m);
IPSEC_STAT_INCREMENT(ipsec6stat.in_nomem);
goto bad;
}
- proto_input(PF_INET6, m);
+
+ // update the receiving interface address based on the inner address
+ ifa = ifa_ifwithaddr((struct sockaddr *)&addr);
+ if (ifa) {
+ m->m_pkthdr.rcvif = ifa->ifa_ifp;
+ IFA_REMREF(ifa);
+ }
+
+ // Input via IPSec interface
+ if (sav->sah->ipsec_if != NULL) {
+ // Return mbuf
+ if (interface != NULL &&
+ interface == sav->sah->ipsec_if) {
+ goto done;
+ }
+
+ if (ipsec_inject_inbound_packet(sav->sah->ipsec_if, m) == 0) {
+ m = NULL;
+ nxt = IPPROTO_DONE;
+ goto done;
+ } else {
+ goto bad;
+ }
+ }
+
+ if (proto_input(ifamily == AF_INET ? PF_INET : PF_INET6, m) != 0)
+ goto bad;
nxt = IPPROTO_DONE;
} else {
/*
IPSEC_STAT_INCREMENT(ipsec6stat.in_nomem);
goto bad;
}
+
+ /*
+ * Set the csum valid flag, if we authenticated the
+ * packet, the payload shouldn't be corrupt unless
+ * it was corrupted before being signed on the other
+ * side.
+ */
+ if (nxt == IPPROTO_TCP || nxt == IPPROTO_UDP) {
+ m->m_pkthdr.csum_flags = CSUM_DATA_VALID | CSUM_PSEUDO_HDR;
+ m->m_pkthdr.csum_data = 0xFFFF;
+ _CASSERT(offsetof(struct pkthdr, csum_data) == offsetof(struct pkthdr, csum_rx_val));
+ }
+
+ // Input via IPSec interface
+ if (sav->sah->ipsec_if != NULL) {
+ // Return mbuf
+ if (interface != NULL &&
+ interface == sav->sah->ipsec_if) {
+ goto done;
+ }
+
+ if (ipsec_inject_inbound_packet(sav->sah->ipsec_if, m) == 0) {
+ m = NULL;
+ nxt = IPPROTO_DONE;
+ goto done;
+ } else {
+ goto bad;
+ }
+ }
+
}
+done:
*offp = off;
*mp = m;
-
if (sav) {
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
- printf("DP esp6_input call free SA:%p\n", sav));
+ printf("DP esp6_input call free SA:0x%llx\n",
+ (uint64_t)VM_KERNEL_ADDRPERM(sav)));
key_freesav(sav, KEY_SADB_UNLOCKED);
}
IPSEC_STAT_INCREMENT(ipsec6stat.in_success);
bad:
if (sav) {
KEYDEBUG(KEYDEBUG_IPSEC_STAMP,
- printf("DP esp6_input call free SA:%p\n", sav));
+ printf("DP esp6_input call free SA:0x%llx\n",
+ (uint64_t)VM_KERNEL_ADDRPERM(sav)));
key_freesav(sav, KEY_SADB_UNLOCKED);
}
- if (m)
+ if (m) {
m_freem(m);
+ }
+ if (interface != NULL) {
+ *mp = NULL;
+ }
return IPPROTO_DONE;
}
void
-esp6_ctlinput(cmd, sa, d)
- int cmd;
- struct sockaddr *sa;
- void *d;
+esp6_ctlinput(int cmd, struct sockaddr *sa, void *d, __unused struct ifnet *ifp)
{
const struct newesp *espp;
struct newesp esp;
struct secasvar *sav;
struct ip6_hdr *ip6;
struct mbuf *m;
- int off;
+ int off = 0;
struct sockaddr_in6 *sa6_src, *sa6_dst;
if (sa->sa_family != AF_INET6 ||
m_copydata(m, off, sizeof(esp), (caddr_t)&esp);
espp = &esp;
} else
- espp = (struct newesp*)(mtod(m, caddr_t) + off);
+ espp = (struct newesp*)(void *)(mtod(m, caddr_t) + off);
if (cmd == PRC_MSGSIZE) {
int valid = 0;
* the address in the ICMP message payload.
*/
sa6_src = ip6cp->ip6c_src;
- sa6_dst = (struct sockaddr_in6 *)sa;
+ sa6_dst = (struct sockaddr_in6 *)(void *)sa;
sav = key_allocsa(AF_INET6,
(caddr_t)&sa6_src->sin6_addr,
(caddr_t)&sa6_dst->sin6_addr,
if (sav->state == SADB_SASTATE_MATURE ||
sav->state == SADB_SASTATE_DYING)
valid++;
- key_freesav(sav, KEY_SADB_LOCKED);
+ key_freesav(sav, KEY_SADB_UNLOCKED);
}
/* XXX Further validation? */
projects / apple / xnu.git / blobdiff