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confread.c
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confread.c
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/* Libreswan config file parser (confread.c)
* Copyright (C) 2001-2002 Mathieu Lafon - Arkoon Network Security
* Copyright (C) 2004 Xelerance Corporation
* Copyright (C) 2006-2008 Michael Richardson <mcr@xelerance.com>
* Copyright (C) 2007 Ken Bantoft <ken@xelerance.com>
* Copyright (C) 2006-2012 Paul Wouters <paul@xelerance.com>
* Copyright (C) 2010 Michael Smith <msmith@cbnco.com>
* Copyright (C) 2010 Tuomo Soini <tis@foobar.fi>
* Copyright (C) 2012-2019 Paul Wouters <pwouters@redhat.com>
* Copyright (C) 2012 Avesh Agarwal <avagarwa@redhat.com>
* Copyright (C) 2012 Antony Antony <antony@phenome.org>
* Copyright (C) 2013 Florian Weimer <fweimer@redhat.com>
* Copyright (C) 2013 David McCullough <ucdevel@gmail.com>
* Copyright (C) 2013-2019 D. Hugh Redelmeier <hugh@mimosa.com>
* Copyright (C) 2016 Andrew Cagney <cagney@gnu.org>
* Copyright (C) 2017-2018 Vukasin Karadzic <vukasin.karadzic@gmail.com>
* Copyright (C) 2017 Mayank Totale <mtotale@gmail.com>
* Copyright (C) 2020 Yulia Kuzovkova <ukuzovkova@gmail.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <https://www.gnu.org/licenses/gpl2.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <sys/socket.h> /* for AF_UNSPEC */
#include "lswalloc.h"
#include "ip_address.h"
#include "ip_info.h"
#include "hunk.h" /* for char_is_space() */
#include "ip_cidr.h"
#include "ipsecconf/confread.h"
#include "ipsecconf/starterlog.h"
#include "ipsecconf/interfaces.h"
#include "ipsecconf/keywords.h"
#include "ipsecconf/parser.h" /* includes parser.tab.h generated by bison; requires keywords.h */
#include "whack.h" /* for DEFAULT_CTL_SOCKET */
#include "lswlog.h"
#ifdef USE_DNSSEC
# include <unbound.h>
# include <arpa/inet.h> /* for inet_ntop */
# include "dnssec.h"
#endif /* USE_DNSSEC */
/**
* Set up hardcoded defaults, from data in programs/pluto/constants.h
*
* @param cfg starter_config struct
* @return void
*/
static void ipsecconf_default_values(struct starter_config *cfg)
{
static const struct starter_config empty_starter_config; /* zero or null everywhere */
*cfg = empty_starter_config;
TAILQ_INIT(&cfg->conns);
/* ==== config setup ==== */
# define SOPT(kbf, v) { cfg->setup.options[kbf] = (v) ; }
SOPT(KBF_LOGTIME, TRUE);
SOPT(KBF_LOGAPPEND, TRUE);
SOPT(KBF_LOGIP, TRUE);
SOPT(KBF_AUDIT_LOG, TRUE);
SOPT(KBF_UNIQUEIDS, TRUE);
SOPT(KBF_LISTEN_UDP, TRUE);
SOPT(KBF_LISTEN_TCP, FALSE);
SOPT(KBF_DO_DNSSEC, TRUE);
SOPT(KBF_PERPEERLOG, FALSE);
SOPT(KBF_IKEBUF, IKE_BUF_AUTO);
SOPT(KBF_IKE_ERRQUEUE, TRUE);
SOPT(KBF_NFLOG_ALL, 0); /* disabled per default */
SOPT(KBF_XFRMLIFETIME, XFRM_LIFETIME_DEFAULT); /* not used by pluto itself */
SOPT(KBF_NHELPERS, -1); /* see also plutomain.c */
SOPT(KBF_KEEPALIVE, 0); /* config setup */
SOPT(KBF_DDOS_IKE_THRESHOLD, DEFAULT_IKE_SA_DDOS_THRESHOLD);
SOPT(KBF_MAX_HALFOPEN_IKE, DEFAULT_MAXIMUM_HALFOPEN_IKE_SA);
SOPT(KBF_SHUNTLIFETIME, PLUTO_SHUNT_LIFE_DURATION_DEFAULT);
/* Don't inflict BSI requirements on everyone */
SOPT(KBF_SEEDBITS, 0);
SOPT(KBF_DROP_OPPO_NULL, FALSE);
#ifdef HAVE_LABELED_IPSEC
SOPT(KBF_SECCTX, SECCTX);
#endif
SOPT(KBF_DDOS_MODE, DDOS_AUTO);
SOPT(KBF_OCSP_CACHE_SIZE, OCSP_DEFAULT_CACHE_SIZE);
SOPT(KBF_OCSP_CACHE_MIN, OCSP_DEFAULT_CACHE_MIN_AGE);
SOPT(KBF_OCSP_CACHE_MAX, OCSP_DEFAULT_CACHE_MAX_AGE);
SOPT(KBF_OCSP_METHOD, OCSP_METHOD_GET);
SOPT(KBF_OCSP_TIMEOUT, OCSP_DEFAULT_TIMEOUT);
SOPT(KBF_SECCOMP, SECCOMP_DISABLED); /* will be enabled in the future */
# undef SOPT
cfg->setup.strings[KSF_PLUTO_DNSSEC_ROOTKEY_FILE] = clone_str(DEFAULT_DNSSEC_ROOTKEY_FILE, "default dnssec rootkey file");
cfg->setup.strings[KSF_NSSDIR] = clone_str(IPSEC_NSSDIR, "default ipsec nssdir");
cfg->setup.strings[KSF_SECRETSFILE] = clone_str(IPSEC_SECRETS_FILE, "default ipsec.secrets file");
cfg->setup.strings[KSF_DUMPDIR] = clone_str(DEFAULT_RUNDIR, "default dumpdir");
cfg->setup.strings[KSF_IPSECDIR] = clone_str(IPSEC_CONFDDIR, "default ipsec.d dir");
/* ==== end of config setup ==== */
cfg->ctlsocket = clone_str(DEFAULT_CTL_SOCKET, "default control socket");
/* ==== conn %default ==== */
struct starter_conn *d = &cfg->conn_default;
# define DOPT(kbf, v) { d->options[kbf] = (v); }
DOPT(KNCF_NAT_KEEPALIVE, TRUE); /* per conn */
DOPT(KNCF_TYPE, KS_TUNNEL);
DOPT(KNCF_INITIAL_CONTACT, FALSE);
DOPT(KNCF_CISCO_UNITY, FALSE);
DOPT(KNCF_NO_ESP_TFC, FALSE);
DOPT(KNCF_VID_STRONGSWAN, FALSE);
DOPT(KNCF_SEND_VENDORID, FALSE);
DOPT(KNCF_REMOTEPEERTYPE, NON_CISCO);
DOPT(KNCF_IKEPAD, TRUE);
DOPT(KNCF_IKEV1_NATT, NATT_BOTH);
DOPT(KNCF_ENCAPS, yna_auto);
DOPT(KNCF_TCP, IKE_TCP_NO);
DOPT(KNCF_REMOTE_TCPPORT, NAT_IKE_UDP_PORT);
/* Network Manager support */
#ifdef HAVE_NM
DOPT(KNCF_NMCONFIGURED, FALSE);
#endif
DOPT(KNCF_XAUTHBY, XAUTHBY_FILE);
DOPT(KNCF_XAUTHFAIL, XAUTHFAIL_HARD);
DOPT(KNCF_NIC_OFFLOAD, yna_auto);
DOPT(KNCF_IKELIFETIME, IKE_SA_LIFETIME_DEFAULT);
DOPT(KNCF_REPLAY_WINDOW, IPSEC_SA_DEFAULT_REPLAY_WINDOW);
DOPT(KNCF_RETRANSMIT_TIMEOUT, RETRANSMIT_TIMEOUT_DEFAULT);
DOPT(KNCF_RETRANSMIT_INTERVAL_MS, RETRANSMIT_INTERVAL_DEFAULT_MS);
DOPT(KNCF_SALIFETIME, IPSEC_SA_LIFETIME_DEFAULT);
DOPT(KNCF_REKEYMARGIN, SA_REPLACEMENT_MARGIN_DEFAULT);
DOPT(KNCF_REKEYFUZZ, SA_REPLACEMENT_FUZZ_DEFAULT);
DOPT(KNCF_KEYINGTRIES, SA_REPLACEMENT_RETRIES_DEFAULT);
DOPT(KNCF_HOSTADDRFAMILY, AF_UNSPEC);
DOPT(KNCF_CLIENTADDRFAMILY, AF_UNSPEC);
DOPT(KNCF_AUTO, STARTUP_IGNORE);
DOPT(KNCF_XFRM_IF_ID, UINT32_MAX);
# undef DOPT
d->ike_version = IKEv2;
d->policy =
POLICY_TUNNEL |
POLICY_ECDSA | POLICY_RSASIG | POLICY_RSASIG_v1_5 | /* authby= */
POLICY_ENCRYPT | POLICY_PFS |
POLICY_IKE_FRAG_ALLOW | /* ike_frag=yes */
POLICY_ESN_NO; /* esn=no */
d->sighash_policy =
POL_SIGHASH_SHA2_256 | POL_SIGHASH_SHA2_384 | POL_SIGHASH_SHA2_512| POL_SIGHASH_IDENTITY;
d->left.host_family = &ipv4_info;
d->left.addr = ipv4_info.address.any;
d->left.nexttype = KH_NOTSET;
d->left.nexthop = ipv4_info.address.any;
d->right.host_family = &ipv4_info;
d->right.addr = ipv4_info.address.any;
d->right.nexttype = KH_NOTSET;
d->right.nexthop = ipv4_info.address.any;
d->xfrm_if_id = UINT32_MAX;
/* default is NOT to look in DNS */
d->left.key_from_DNS_on_demand = FALSE;
d->right.key_from_DNS_on_demand = FALSE;
d->state = STATE_LOADED;
d->left.authby = AUTHBY_UNSET;
d->right.authby = AUTHBY_UNSET;
d->left.updown = clone_str(DEFAULT_UPDOWN, "conn default left updown");
d->right.updown = clone_str(DEFAULT_UPDOWN, "conn default right updown");
/* ==== end of conn %default ==== */
}
/*
* format error, and append to string of errors
* The messages are separated by newline: not perfect.
*/
void starter_error_append(starter_errors_t *perrl, const char *fmt, ...)
{
va_list args;
char tmp_err[512];
va_start(args, fmt);
vsnprintf(tmp_err, sizeof(tmp_err) - 1, fmt, args);
va_end(args);
if (perrl->errors == NULL) {
/* first error */
perrl->errors = clone_str(tmp_err, "starter error");
} else {
/* subsequent error: append to previous messages */
size_t ol = strlen(perrl->errors);
size_t al = strlen(tmp_err);
char *nerr = alloc_bytes(ol + al + 2, "starter errors");
memcpy(nerr, perrl->errors, ol);
nerr[ol] = '\n';
memcpy(&nerr[ol + 1], tmp_err, al + 1);
pfree(perrl->errors);
perrl->errors = nerr;
}
}
#define KW_POLICY_FLAG(val, fl) { \
if (conn->options_set[val]) \
conn->policy = (conn->policy & ~(fl)) | \
(conn->options[val] ? (fl) : LEMPTY); \
}
#define KW_POLICY_NEGATIVE_FLAG(val, fl) { \
if (conn->options_set[val]) { \
conn->policy = (conn->policy & ~(fl)) | \
(!conn->options[val] ? (fl) : LEMPTY); \
} \
}
/**
* Create a NULL-terminated array of tokens from a string of whitespace-separated tokens.
*
* @param value string to be broken up at blanks, creating strings for list
* @param n where to place element count (excluding terminating NULL)
* @return tokens_from_string (NULL or pointer to NULL-terminated array of pointers to strings)
*/
static char **tokens_from_string(const char *value, int *n)
{
*n = 0; /* in case of early exit */
if (value == NULL)
return NULL;
/* avoid damaging original string */
char *const val = clone_str(value, "tokens_from_string value");
if (val == NULL)
return NULL; /* cannot happen -- silence a coverity warning */
char *const end = val + strlen(val);
/* count number of items in string and terminate each with NUL */
int count = 0;
for (char *b = val; b < end; ) {
char *e;
for (e = b; *e != '\0' && !char_isspace(*e); e++)
;
*e = '\0';
if (e != b)
count++;
b = e + 1;
}
*n = count;
if (count == 0) {
pfree(val);
return NULL;
}
char **const nlist = (char **)alloc_bytes((count + 1) * sizeof(char *), "tokens_from_string nlist");
count = 0;
for (char *b = val; b < end; ) {
char *e = b + strlen(b);
if (e != b)
nlist[count++] = clone_str(b, "tokens_from_string item");
b = e + 1;
}
nlist[count] = NULL;
pfree(val);
return nlist;
}
/**
* Load a parsed config
*
* @param cfg starter_config structure
* @param cfgp config_parsed (ie: valid) struct
* @param perr pointer to store errors in
* @return bool TRUE if unsuccessful
*/
static bool load_setup(struct starter_config *cfg,
const struct config_parsed *cfgp)
{
bool err = FALSE;
const struct kw_list *kw;
for (kw = cfgp->config_setup; kw != NULL; kw = kw->next) {
/**
* the parser already made sure that only config keywords were used,
* but we double check!
*/
assert(kw->keyword.keydef->validity & kv_config);
unsigned f = kw->keyword.keydef->field;
switch (kw->keyword.keydef->type) {
case kt_string:
case kt_filename:
case kt_dirname:
case kt_loose_enum:
/* all treated as strings for now */
assert(f < elemsof(cfg->setup.strings));
pfreeany(cfg->setup.strings[f]);
cfg->setup.strings[f] =
clone_str(kw->string, "kt_loose_enum kw->string");
cfg->setup.strings_set[f] = TRUE;
break;
case kt_list:
case kt_lset:
case kt_bool:
case kt_invertbool:
case kt_enum:
case kt_number:
case kt_time:
case kt_percent:
/* all treated as a number for now */
assert(f < elemsof(cfg->setup.options));
cfg->setup.options[f] = kw->number;
cfg->setup.options_set[f] = TRUE;
break;
case kt_bitstring:
case kt_rsasigkey:
case kt_ipaddr:
case kt_subnet:
case kt_range:
case kt_idtype:
err = TRUE;
break;
case kt_comment:
break;
case kt_obsolete:
starter_log(LOG_LEVEL_INFO,
"Warning: ignored obsolete keyword '%s'",
kw->keyword.keydef->keyname);
break;
case kt_obsolete_quiet:
starter_log(LOG_LEVEL_ERR,
"Warning: ignored obsolete keyword '%s'",
kw->keyword.keydef->keyname);
break;
default:
/* NEVER HAPPENS */
break;
}
}
return err;
}
/**
* Validate that yes in fact we are one side of the tunnel
*
* The function checks that IP addresses are valid, nexthops are
* present (if needed) as well as policies, and sets the leftID
* from the left= if it isn't set. It sets the conn's sec_label
* into its left/right struct end options
*
* @param conn_st a connection definition
* @param end a connection end
* @param leftright const char * "left" or "right"
* @param perrl pointer to starter_errors_t
* @return bool TRUE if failed
*/
static bool validate_end(struct starter_conn *conn_st,
struct starter_end *end,
const char *leftright,
starter_errors_t *perrl,
struct logger *logger)
{
err_t er = NULL;
bool err = FALSE;
/*
* TODO:
* The address family default should come in either via
* a config setup option, or via gai.conf / RFC3484
* For now, %defaultroute and %any means IPv4 only
*/
const struct ip_info *hostfam = aftoinfo(conn_st->options[KNCF_HOSTADDRFAMILY]);
if (hostfam == NULL) {
const char *ips = end->strings[KNCF_IP];
hostfam = &ipv4_info;
if (ips != NULL &&
(strchr(ips, ':') != NULL ||
streq(ips, "%defaultroute6") ||
streq(ips, "%any6"))) {
hostfam = &ipv6_info;
}
}
pexpect(hostfam == &ipv4_info || hostfam == &ipv6_info); /* i.e., not NULL */
# define ERR_FOUND(...) { starter_error_append(perrl, __VA_ARGS__); err = TRUE; }
if (!end->options_set[KNCF_IP])
conn_st->state = STATE_INCOMPLETE;
/* validate the KSCF_IP/KNCF_IP */
end->addrtype = end->options[KNCF_IP];
switch (end->addrtype) {
case KH_ANY:
end->addr = hostfam->address.any;
break;
case KH_IFACE:
/* generally, this doesn't show up at this stage */
starter_log(LOG_LEVEL_DEBUG, "starter: %s is KH_IFACE", leftright);
break;
case KH_IPADDR:
assert(end->strings[KSCF_IP] != NULL);
if (end->strings[KSCF_IP][0] == '%') {
pfree(end->iface);
end->iface = clone_str(end->strings[KSCF_IP] + 1, "KH_IPADDR end->iface");
if (!starter_iface_find(end->iface, hostfam,
&end->addr,
&end->nexthop))
conn_st->state = STATE_INVALID;
/* not numeric, so set the type to the iface type */
end->addrtype = KH_IFACE;
break;
}
er = ttoaddress_num(shunk1(end->strings[KNCF_IP]), hostfam, &end->addr);
if (er != NULL) {
/* not an IP address, so set the type to the string */
end->addrtype = KH_IPHOSTNAME;
} else {
hostfam = address_type(&end->addr);
}
if (end->id == NULL) {
ipstr_buf b;
end->id = clone_str(ipstr(&end->addr, &b), "end if");
}
break;
case KH_OPPO:
conn_st->policy |= POLICY_OPPORTUNISTIC;
break;
case KH_OPPOGROUP:
conn_st->policy |= POLICY_OPPORTUNISTIC | POLICY_GROUP;
break;
case KH_GROUP:
conn_st->policy |= POLICY_GROUP;
break;
case KH_IPHOSTNAME:
/* generally, this doesn't show up at this stage */
starter_log(LOG_LEVEL_DEBUG,
"starter: %s is KH_IPHOSTNAME", leftright);
break;
case KH_DEFAULTROUTE:
starter_log(LOG_LEVEL_DEBUG,
"starter: %s is KH_DEFAULTROUTE", leftright);
break;
case KH_NOTSET:
/* cannot error out here, it might be a partial also= conn */
break;
}
/* now that HOSTFAM has been pined down */
end->host_family = hostfam;
if (end->strings_set[KSCF_VTI_IP]) {
const char *value = end->strings[KSCF_VTI_IP];
err_t oops = numeric_to_cidr(shunk1(value), NULL, &end->vti_ip);
if (oops != NULL) {
ERR_FOUND("bad addr %s%s=%s [%s]",
leftright, "vti", value, oops);
}
oops = cidr_specified(end->vti_ip);
if (oops != NULL) {
ERR_FOUND("bad addr %s%s=%s [%s]",
leftright, "vti", value, oops);
}
/* XXX: check type? */
}
/* validate the KSCF_SUBNET */
if (end->strings_set[KSCF_SUBNET]) {
char *value = end->strings[KSCF_SUBNET];
if (end->strings_set[KSCF_ADDRESSPOOL]) {
ERR_FOUND("cannot specify both %ssubnet= and %saddresspool=", leftright,
leftright);
}
if (startswith(value, "vhost:") || startswith(value, "vnet:")) {
if (conn_st->ike_version != IKEv1) {
ERR_FOUND("The vnet: and vhost: keywords are only valid for IKEv1 connections");
}
er = NULL;
end->virt = clone_str(value, "validate_end item");
} else {
end->has_client = TRUE;
er = ttosubnet(shunk1(value), AF_UNSPEC, '0',
&end->subnet, logger);
}
if (er != NULL)
ERR_FOUND("bad subnet %ssubnet=%s [%s]", leftright,
value, er);
}
/*
* validate the KSCF_NEXTHOP; set nexthop address to
* something consistent, by default
*/
end->nexthop = hostfam->address.any;
if (end->strings_set[KSCF_NEXTHOP]) {
char *value = end->strings[KSCF_NEXTHOP];
if (strcaseeq(value, "%defaultroute")) {
end->nexttype = KH_DEFAULTROUTE;
} else {
ip_address nexthop = unset_address;
#ifdef USE_DNSSEC
if (ttoaddress_num(shunk1(value), hostfam, &nexthop) != NULL) {
starter_log(LOG_LEVEL_DEBUG,
"Calling unbound_resolve() for %snexthop value",
leftright);
if (!unbound_resolve(value, hostfam, &nexthop, logger))
ERR_FOUND("bad value for %snexthop=%s\n",
leftright, value);
}
#else
err_t e = ttoaddress_dns(shunk1(value), hostfam, &nexthop);
if (e != NULL) {
ERR_FOUND("bad value for %snexthop=%s [%s]",
leftright, value, e);
}
#endif
end->nexthop = nexthop;
end->nexttype = KH_IPADDR;
}
} else {
end->nexthop = hostfam->address.any;
if (end->addrtype == KH_DEFAULTROUTE) {
end->nexttype = KH_DEFAULTROUTE;
}
}
/* validate the KSCF_ID */
if (end->strings_set[KSCF_ID]) {
char *value = end->strings[KSCF_ID];
pfreeany(end->id);
end->id = clone_str(value, "end->id");
/* fixup old ",," in a ID_DER_ASN1_DN to proper backslash comma */
if ((end->id[0] != '@') && (strstr(end->id, ",,") != NULL)
&& strstr(end->id, "=") != NULL)
{
char *cc;
while ((cc = strstr(end->id, ",,")) != NULL) {
cc[0] = '\\';
}
}
}
/* Note label is conn option copied to both end's option */
if (conn_st->strings_set[KSCF_SA_SEC_LABEL]) {
char *value = conn_st->strings[KSCF_SA_SEC_LABEL];
pfreeany(end->sec_label);
end->sec_label = clone_str(value, "end->sec_label");
}
if (end->options_set[KSCF_RSASIGKEY]) {
end->rsasigkey_type = end->options[KSCF_RSASIGKEY];
switch (end->options[KSCF_RSASIGKEY]) {
case PUBKEY_DNSONDEMAND:
end->key_from_DNS_on_demand = TRUE;
break;
default:
end->key_from_DNS_on_demand = FALSE;
/* validate the KSCF_RSASIGKEY1/RSASIGKEY2 */
if (end->strings[KSCF_RSASIGKEY] != NULL) {
char *value = end->strings[KSCF_RSASIGKEY];
pfreeany(end->rsasigkey);
end->rsasigkey = clone_str(value, "end->rsasigkey");
}
}
}
/* validate the KSCF_SOURCEIP, if any, and if set,
* set the subnet to same value, if not set.
*/
if (end->strings_set[KSCF_SOURCEIP]) {
char *value = end->strings[KSCF_SOURCEIP];
/*
* XXX: suspect this lookup should be forced to use
* the same family as the client.
*/
ip_address sourceip = unset_address;
#ifdef USE_DNSSEC
/* try numeric first */
err_t e = ttoaddress_num(shunk1(value), NULL/*UNSPEC*/, &sourceip);
if (e != NULL) {
starter_log(LOG_LEVEL_DEBUG,
"Calling unbound_resolve() for %ssourceip value",
leftright);
if (!unbound_resolve(value, &ipv4_info, &end->sourceip, logger) &&
!unbound_resolve(value, &ipv6_info, &end->sourceip, logger))
ERR_FOUND("bad value for %ssourceip=%s\n",
leftright, value);
}
#else
/* try numeric then DNS */
err_t e = ttoaddress_dns(shunk1(value), AF_UNSPEC, &sourceip);
if (e != NULL) {
ERR_FOUND("bad addr %ssourceip=%s [%s]",
leftright, value, e);
}
#endif
end->sourceip = sourceip;
if (!end->has_client) {
end->subnet = subnet_from_address(end->sourceip);
end->has_client = TRUE;
}
if (end->strings_set[KSCF_INTERFACE_IP]) {
ERR_FOUND("cannot specify %sinterface-ip=%s and %sssourceip=%s",
leftright,
end->strings[KSCF_INTERFACE_IP],
leftright,
end->strings[KSCF_SOURCEIP]);
}
}
/* copy certificate path name */
if (end->strings_set[KSCF_CERT] && end->strings_set[KSCF_CKAID]) {
ERR_FOUND("only one of %scert and %sckaid can be specified",
leftright, leftright);
}
if (end->strings_set[KSCF_CERT]) {
end->certx = clone_str(end->strings[KSCF_CERT], "KSCF_CERT");
}
if (end->strings_set[KSCF_CKAID]) {
const char *ckaid = end->strings[KSCF_CKAID];
/* try parsing it */
const char *ugh = ttodata(ckaid, 0, 16, NULL, 0, NULL);
if (ugh != NULL) {
ERR_FOUND("invalid %sckaid: %s", leftright, ugh);
}
end->ckaid = clone_str(ckaid, "KSCF_CKAID");
}
if (end->strings_set[KSCF_CA])
end->ca = clone_str(end->strings[KSCF_CA], "KSCF_CA");
if (end->strings_set[KSCF_UPDOWN]) {
pfreeany(end->updown);
end->updown = clone_str(end->strings[KSCF_UPDOWN], "KSCF_UPDOWN");
}
if (end->strings_set[KSCF_PROTOPORT]) {
char *value = end->strings[KSCF_PROTOPORT];
err_t ugh = ttoprotoport(value, &end->protoport);
if (ugh != NULL)
ERR_FOUND("bad %sprotoport=%s [%s]", leftright, value,
ugh);
}
if (end->strings_set[KSCF_ADDRESSPOOL]) {
char *addresspool = end->strings[KSCF_ADDRESSPOOL];
if (end->strings_set[KSCF_SUBNET])
ERR_FOUND("cannot specify both %ssubnet= and %saddresspool=",
leftright, leftright);
starter_log(LOG_LEVEL_DEBUG,
"connection's %saddresspool set to: %s",
leftright, end->strings[KSCF_ADDRESSPOOL] );
er = ttorange(addresspool, NULL, &end->pool_range);
if (er != NULL)
ERR_FOUND("bad %saddresspool=%s [%s]", leftright,
addresspool, er);
if (range_type(&end->pool_range) == &ipv6_info &&
!end->pool_range.is_subnet) {
ERR_FOUND("bad IPv6 %saddresspool=%s not subnet", leftright,
addresspool);
}
}
if (end->strings_set[KSCF_INTERFACE_IP]) {
const char *value = end->strings[KSCF_INTERFACE_IP];
err_t oops = numeric_to_cidr(shunk1(value), NULL, &end->ifaceip);
if (oops != NULL) {
ERR_FOUND("bad addr %s%s=%s [%s]",
leftright, "interface-ip", value, oops);
}
oops = cidr_specified(end->ifaceip);
if (oops != NULL) {
ERR_FOUND("bad addr %s%s=%s [%s]",
leftright, "interface-ip", value, oops);
}
if (end->strings_set[KSCF_SOURCEIP]) {
ERR_FOUND("cannot specify %sinterface-ip=%s and %sssourceip=%s",
leftright,
end->strings[KSCF_INTERFACE_IP],
leftright,
end->strings[KSCF_SOURCEIP]);
}
}
if (end->options_set[KNCF_XAUTHSERVER] ||
end->options_set[KNCF_XAUTHCLIENT])
conn_st->policy |= POLICY_XAUTH;
return err;
# undef ERR_FOUND
}
/**
* Take keywords from ipsec.conf syntax and load into a conn struct
*
* @param conn a connection definition
* @param sl a section_list
* @param assigned_value is set to either k_set, or k_default.
* k_default is used when we are loading a conn that should be
* considered to be a "default" value, and that replacing this
* value is considered acceptable.
* @return bool TRUE if unsuccessful
*/
static bool translate_conn(struct starter_conn *conn,
const struct section_list *sl,
enum keyword_set assigned_value,
starter_errors_t *perrl)
{
/* note: not all errors are considered serious */
bool serious_err = FALSE;
for (const struct kw_list *kw = sl->kw; kw != NULL; kw = kw->next) {
if ((kw->keyword.keydef->validity & kv_conn) == 0) {
/* this isn't valid in a conn! */
char tmp_err[512];
snprintf(tmp_err, sizeof(tmp_err),
"keyword '%s' is not valid in a conn (%s)\n",
kw->keyword.keydef->keyname, sl->name);
starter_log(LOG_LEVEL_INFO, "%s", tmp_err);
starter_error_append(perrl, "%s", tmp_err);
continue;
}
ksf *the_strings;
str_set *set_strings;
unsigned str_floor, str_roof;
knf *the_options;
int_set *set_options;
unsigned opt_floor, opt_roof;
if (kw->keyword.keydef->validity & kv_leftright) {
struct starter_end *this = kw->keyword.keyleft ?
&conn->left : &conn->right;
the_strings = &this->strings;
set_strings = &this->strings_set;
str_floor = KSCF_last_loose + 1;
str_roof = KSCF_last_leftright + 1;
the_options = &this->options;
set_options = &this->options_set;
opt_floor = KSCF_last_loose + 1;
opt_roof = KNCF_last_leftright + 1;
} else {
the_strings = &conn->strings;
set_strings = &conn->strings_set;
str_floor = KSCF_last_leftright + 1;
str_roof = KSCF_ROOF;
the_options = &conn->options;
set_options = &conn->options_set;
opt_floor = KNCF_last_leftright + 1;
opt_roof = KNCF_ROOF;
}
unsigned int field = kw->keyword.keydef->field;
assert(kw->keyword.keydef != NULL);
switch (kw->keyword.keydef->type) {
case kt_string:
case kt_filename:
case kt_dirname:
case kt_bitstring:
case kt_ipaddr:
case kt_range:
case kt_subnet:
case kt_idtype:
/* all treated as strings for now, even loose enums */
assert(field < str_roof);
if ((*set_strings)[field] == k_set) {
char tmp_err[512];
snprintf(tmp_err, sizeof(tmp_err),
"duplicate key '%s' in conn %s while processing def %s",
kw->keyword.keydef->keyname,
conn->name,
sl->name);
starter_log(LOG_LEVEL_INFO, "%s", tmp_err);
starter_error_append(perrl, "%s", tmp_err);
/* only fatal if we try to change values */
if (kw->keyword.string == NULL ||
(*the_strings)[field] == NULL ||
!streq(kw->keyword.string,
(*the_strings)[field]))
{
serious_err = TRUE;
break;
}
}
pfreeany((*the_strings)[field]);
if (kw->string == NULL) {
starter_error_append(perrl, "Invalid %s value",
kw->keyword.keydef->keyname);
serious_err = TRUE;
break;
}
(*the_strings)[field] = clone_str(kw->string, "kt_idtype kw->string");
(*set_strings)[field] = assigned_value;
break;
case kt_appendstring:
case kt_appendlist:
/* implicitly, this field can have multiple values */
assert(str_floor <= field && field < str_roof);
if ((*the_strings)[field] == NULL) {
(*the_strings)[field] = clone_str(kw->string, "kt_appendlist kw->string");
} else {
char *s = (*the_strings)[field];
size_t old_len = strlen(s); /* excludes '\0' */
size_t new_len = strlen(kw->string);
char *n = alloc_bytes(old_len + 1 + new_len + 1, "kt_appendlist");
memcpy(n, s, old_len);
n[old_len] = ' ';
memcpy(n + old_len + 1, kw->string, new_len + 1); /* includes '\0' */
(*the_strings)[field] = n;
pfree(s);
}
(*set_strings)[field] = TRUE;
break;
case kt_rsasigkey:
case kt_loose_enum:
assert(field <= KSCF_last_loose);
if ((*set_options)[field] == k_set) {
char tmp_err[512];
snprintf(tmp_err, sizeof(tmp_err),
"duplicate key '%s' in conn %s while processing def %s",
kw->keyword.keydef->keyname,
conn->name,
sl->name);
starter_log(LOG_LEVEL_INFO, "%s", tmp_err);
starter_error_append(perrl, "%s", tmp_err);
/* only fatal if we try to change values */
if ((*the_options)[field] != (int)kw->number ||
!((*the_options)[field] ==
LOOSE_ENUM_OTHER &&
kw->number == LOOSE_ENUM_OTHER &&
kw->keyword.string != NULL &&
(*the_strings)[field] != NULL &&
streq(kw->keyword.string,
(*the_strings)[field])))
{
serious_err = TRUE;
break;
}
}
(*the_options)[field] = kw->number;
if (kw->number == LOOSE_ENUM_OTHER) {
assert(kw->keyword.string != NULL);
pfreeany((*the_strings)[field]);
(*the_strings)[field] = clone_str(
kw->keyword.string, "kt_loose_enum kw->keyword.string");
}
(*set_options)[field] = assigned_value;
break;
case kt_list:
case kt_lset:
case kt_bool:
case kt_invertbool:
case kt_enum:
case kt_number:
case kt_time:
case kt_percent:
/* all treated as a number for now */
assert(opt_floor <= field && field < opt_roof);
if ((*set_options)[field] == k_set) {
char tmp_err[512];
snprintf(tmp_err, sizeof(tmp_err),
"duplicate key '%s' in conn %s while processing def %s",
kw->keyword.keydef->keyname,
conn->name,
sl->name);
starter_log(LOG_LEVEL_INFO, "%s", tmp_err);
starter_error_append(perrl, "%s", tmp_err);
/* only fatal if we try to change values */
if ((*the_options)[field] != (int)kw->number) {
serious_err = TRUE;
break;
}
}
(*the_options)[field] = kw->number;
(*set_options)[field] = assigned_value;
break;
case kt_comment:
break;
case kt_obsolete:
starter_log(LOG_LEVEL_INFO,
"Warning: obsolete keyword '%s' ignored",
kw->keyword.keydef->keyname);
break;
case kt_obsolete_quiet:
starter_log(LOG_LEVEL_ERR,
"Warning: obsolete keyword '%s' ignored",
kw->keyword.keydef->keyname);
break;
}
}
return serious_err;
}
static void move_comment_list(struct starter_comments_list *to,
struct starter_comments_list *from)
{
struct starter_comments *sc, *scnext;