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bind9/bin/named/config.c
Colin Vidal 628a295f3e fix unitiailized pointer check on getipandkeylist 
Function `named_config_getipandkeylist` could, in case of error in the
early code attempting to get the `port` or `tls-port`, make a pointer
check on a non-initialized value. This is now fixed.

(cherry picked from commit 954503b9f5)
2025-11-28 15:38:18 +01:00

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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* SPDX-License-Identifier: MPL-2.0
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, you can obtain one at https://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
/*! \file */
#include <bind.keys.h>
#include <inttypes.h>
#include <stdlib.h>
#include <isc/buffer.h>
#include <isc/log.h>
#include <isc/mem.h>
#include <isc/netmgr.h>
#include <isc/parseint.h>
#include <isc/region.h>
#include <isc/result.h>
#include <isc/sockaddr.h>
#include <isc/string.h>
#include <isc/util.h>
#include <dns/fixedname.h>
#include <dns/kasp.h>
#include <dns/name.h>
#include <dns/rdataclass.h>
#include <dns/rdatatype.h>
#include <dns/tsig.h>
#include <dns/zone.h>
#include <dst/dst.h>
#include <isccfg/grammar.h>
#include <isccfg/namedconf.h>
#include <named/config.h>
#include <named/globals.h>
/*% default configuration */
static char defaultconf[] = "\
options {\n\
answer-cookie true;\n\
automatic-interface-scan yes;\n\
# blackhole {none;};\n\
cookie-algorithm siphash24;\n\
# directory <none>\n\
dnssec-policy \"none\";\n\
dump-file \"named_dump.db\";\n\
edns-udp-size 1232;\n"
#if defined(HAVE_GEOIP2)
"\
geoip-directory \"" MAXMINDDB_PREFIX "/share/GeoIP\";\n"
#elif defined(HAVE_GEOIP2)
"\
geoip-directory \".\";\n"
#endif /* if defined(HAVE_GEOIP2) */
"\
heartbeat-interval 60;\n\
interface-interval 60m;\n \
listen-on {any;};\n\
listen-on-v6 {any;};\n\
match-mapped-addresses no;\n\
max-ixfr-ratio 100%;\n\
max-rsa-exponent-size 0; /* no limit */\n\
max-udp-size 1232;\n\
memstatistics-file \"named.memstats\";\n\
nocookie-udp-size 4096;\n\
notify-rate 20;\n\
nta-lifetime 3600;\n\
nta-recheck 300;\n\
# pid-file \"" NAMED_LOCALSTATEDIR "/run/named/named.pid\"; \n\
port 53;\n"
#if HAVE_SO_REUSEPORT_LB
"\
reuseport yes;\n"
#else
"\
reuseport no;\n"
#endif
"\
tls-port 853;\n"
#if HAVE_LIBNGHTTP2
"\
http-port 80;\n\
https-port 443;\n\
http-listener-clients 300;\n\
http-streams-per-connection 100;\n"
#endif
"\
prefetch 2 9;\n\
# querylog <boolean>;\n\
recursing-file \"named.recursing\";\n\
recursive-clients 1000;\n\
request-nsid false;\n\
resolver-query-timeout 10;\n\
# responselog <boolean>;\n\
rrset-order { order random; };\n\
secroots-file \"named.secroots\";\n\
send-cookie true;\n\
serial-query-rate 20;\n\
server-id none;\n\
session-keyalg hmac-sha256;\n\
# session-keyfile \"" NAMED_LOCALSTATEDIR "/run/named/session.key\";\n\
session-keyname local-ddns;\n\
startup-notify-rate 20;\n\
sig0checks-quota 1;\n\
sig0key-checks-limit 16;\n\
sig0message-checks-limit 2;\n\
statistics-file \"named.stats\";\n\
tcp-advertised-timeout 300;\n\
tcp-clients 150;\n\
tcp-idle-timeout 300;\n\
tcp-initial-timeout 300;\n\
tcp-keepalive-timeout 300;\n\
tcp-listen-queue 10;\n\
tcp-receive-buffer 0;\n\
tcp-send-buffer 0;\n\
# tkey-gssapi-credential <none>\n\
transfer-message-size 20480;\n\
transfers-in 10;\n\
transfers-out 10;\n\
transfers-per-ns 2;\n\
trust-anchor-telemetry yes;\n\
udp-receive-buffer 0;\n\
udp-send-buffer 0;\n\
update-quota 100;\n\
\n\
/* view */\n\
allow-new-zones no;\n\
allow-notify {none;};\n\
allow-proxy {none;};\n\
allow-proxy-on {any;};\n\
allow-query-cache { localnets; localhost; };\n\
allow-query-cache-on { any; };\n\
allow-recursion { localnets; localhost; };\n\
allow-recursion-on { any; };\n\
allow-update-forwarding {none;};\n\
auth-nxdomain false;\n\
check-dup-records warn;\n\
check-mx warn;\n\
check-names primary fail;\n\
check-names response ignore;\n\
check-names secondary warn;\n\
check-spf warn;\n\
check-svcb yes;\n\
clients-per-query 10;\n\
dnssec-accept-expired no;\n\
dnssec-validation " VALIDATION_DEFAULT "; \n"
#ifdef USE_DNSRPS
" dnsrps-library \"" DNSRPS_LIBRPZ_PATH "\";\n"
#endif /* ifdef USE_DNSRPS */
#ifdef HAVE_DNSTAP
" dnstap-identity hostname;\n"
#endif /* ifdef HAVE_DNSTAP */
"\
fetch-quota-params 100 0.1 0.3 0.7;\n\
fetches-per-server 0;\n\
fetches-per-zone 0;\n\
lame-ttl 0;\n"
#ifdef HAVE_LMDB
" lmdb-mapsize 32M;\n"
#endif /* ifdef HAVE_LMDB */
" max-cache-size default;\n\
max-cache-ttl 604800; /* 1 week */\n\
max-clients-per-query 100;\n\
max-ncache-ttl 10800; /* 3 hours */\n\
max-recursion-depth 7;\n\
max-recursion-queries 50;\n\
max-query-count 200;\n\
max-query-restarts 11;\n\
max-stale-ttl 86400; /* 1 day */\n\
message-compression yes;\n\
min-ncache-ttl 0; /* 0 hours */\n\
min-cache-ttl 0; /* 0 seconds */\n\
minimal-any false;\n\
minimal-responses no-auth-recursive;\n\
notify-source *;\n\
notify-source-v6 *;\n\
nsec3-test-zone no;\n\
parental-source *;\n\
parental-source-v6 *;\n\
provide-ixfr true;\n\
response-padding { none; } block-size 0;\n\
qname-minimization relaxed;\n\
query-source address *;\n\
query-source-v6 address *;\n\
recursion true;\n\
request-expire true;\n\
request-ixfr true;\n\
require-server-cookie no;\n\
root-key-sentinel yes;\n\
servfail-ttl 1;\n\
# sortlist <none>\n\
stale-answer-client-timeout off;\n\
stale-answer-enable false;\n\
stale-answer-ttl 30; /* 30 seconds */\n\
stale-cache-enable false;\n\
stale-refresh-time 30; /* 30 seconds */\n\
synth-from-dnssec yes;\n\
# topology <none>\n\
transfer-format many-answers;\n\
resolver-use-dns64 false;\n\
v6-bias 50;\n\
zero-no-soa-ttl-cache no;\n\
\n\
/* zone */\n\
allow-query {any;};\n\
allow-query-on {any;};\n\
allow-transfer {none;};\n\
# also-notify <none>\n\
check-integrity yes;\n\
check-mx-cname warn;\n\
check-sibling yes;\n\
check-srv-cname warn;\n\
check-wildcard yes;\n\
dialup no;\n\
dnssec-loadkeys-interval 60;\n\
# forward <none>\n\
# forwarders <none>\n\
# inline-signing no;\n\
ixfr-from-differences false;\n\
max-journal-size default;\n\
max-records 0;\n\
max-records-per-type 100;\n\
max-refresh-time 2419200; /* 4 weeks */\n\
max-retry-time 1209600; /* 2 weeks */\n\
max-types-per-name 100;\n\
max-transfer-idle-in 60;\n\
max-transfer-idle-out 60;\n\
max-transfer-time-in 120;\n\
max-transfer-time-out 120;\n\
min-refresh-time 300;\n\
min-retry-time 500;\n\
min-transfer-rate-in 10240 5;\n\
multi-master no;\n\
notify yes;\n\
notify-defer 0;\n\
notify-delay 5;\n\
notify-to-soa no;\n\
serial-update-method increment;\n\
sig-signing-nodes 100;\n\
sig-signing-signatures 10;\n\
sig-signing-type 65534;\n\
transfer-source *;\n\
transfer-source-v6 *;\n\
try-tcp-refresh yes; /* BIND 8 compat */\n\
zero-no-soa-ttl yes;\n\
zone-statistics terse;\n\
};\n\
"
"#\n\
# Zones in the \"_bind\" view are NOT counted in the count of zones.\n\
#\n\
view \"_bind\" chaos {\n\
recursion no;\n\
notify no;\n\
allow-new-zones no;\n\
max-cache-size 2M;\n\
\n\
# Prevent use of this zone in DNS amplified reflection DoS attacks\n\
rate-limit {\n\
responses-per-second 3;\n\
slip 0;\n\
min-table-size 10;\n\
};\n\
\n\
zone \"version.bind\" chaos {\n\
type primary;\n\
database \"_builtin version\";\n\
};\n\
\n\
zone \"hostname.bind\" chaos {\n\
type primary;\n\
database \"_builtin hostname\";\n\
};\n\
\n\
zone \"authors.bind\" chaos {\n\
type primary;\n\
database \"_builtin authors\";\n\
};\n\
\n\
zone \"id.server\" chaos {\n\
type primary;\n\
database \"_builtin id\";\n\
};\n\
};\n\
"
"#\n\
# Built-in DNSSEC key and signing policies.\n\
#\n\
dnssec-policy \"default\" {\n\
keys {\n\
csk key-directory lifetime unlimited algorithm 13;\n\
};\n\
\n\
cdnskey yes;\n\
cds-digest-types { 2; };\n\
dnskey-ttl " DNS_KASP_KEY_TTL ";\n\
inline-signing yes;\n\
manual-mode no;\n\
offline-ksk no;\n\
publish-safety " DNS_KASP_PUBLISH_SAFETY "; \n\
retire-safety " DNS_KASP_RETIRE_SAFETY "; \n\
purge-keys " DNS_KASP_PURGE_KEYS "; \n\
signatures-jitter " DNS_KASP_SIG_JITTER "; \n\
signatures-refresh " DNS_KASP_SIG_REFRESH "; \n\
signatures-validity " DNS_KASP_SIG_VALIDITY "; \n\
signatures-validity-dnskey " DNS_KASP_SIG_VALIDITY_DNSKEY "; \n\
max-zone-ttl " DNS_KASP_ZONE_MAXTTL "; \n\
zone-propagation-delay " DNS_KASP_ZONE_PROPDELAY "; \n\
parent-ds-ttl " DNS_KASP_DS_TTL "; \n\
parent-propagation-delay " DNS_KASP_PARENT_PROPDELAY "; \n\
};\n\
\n\
dnssec-policy \"insecure\" {\n\
max-zone-ttl 0; \n\
keys { };\n\
inline-signing yes;\n\
manual-mode no;\n\
};\n\
\n\
"
"#\n\
# Default trusted key(s), used if \n\
# \"dnssec-validation auto;\" is set and\n\
# " NAMED_SYSCONFDIR "/bind.keys doesn't exist).\n\
#\n\
# BEGIN TRUST ANCHORS\n"
/* Imported from bind.keys.h: */
TRUST_ANCHORS
"# END TRUST ANCHORS\n\
\n\
remote-servers " DEFAULT_IANA_ROOT_ZONE_PRIMARIES " {\n\
2801:1b8:10::b; # b.root-servers.net\n\
2001:500:2::c; # c.root-servers.net\n\
2001:500:2f::f; # f.root-servers.net\n\
2001:500:12::d0d; # g.root-servers.net\n\
2001:7fd::1; # k.root-servers.net\n\
2620:0:2830:202::132; # xfr.cjr.dns.icann.org\n\
2620:0:2d0:202::132; # xfr.lax.dns.icann.org\n\
170.247.170.2; # b.root-servers.net\n\
192.33.4.12; # c.root-servers.net\n\
192.5.5.241; # f.root-servers.net\n\
192.112.36.4; # g.root-servers.net\n\
193.0.14.129; # k.root-servers.net\n\
192.0.47.132; # xfr.cjr.dns.icann.org\n\
192.0.32.132; # xfr.lax.dns.icann.org\n\
};\n\
";
isc_result_t
named_config_parsedefaults(cfg_parser_t *parser, cfg_obj_t **conf) {
isc_buffer_t b;
isc_buffer_init(&b, defaultconf, sizeof(defaultconf) - 1);
isc_buffer_add(&b, sizeof(defaultconf) - 1);
return cfg_parse_buffer(parser, &b, __FILE__, 0, &cfg_type_namedconf,
CFG_PCTX_NODEPRECATED | CFG_PCTX_NOOBSOLETE |
CFG_PCTX_NOEXPERIMENTAL,
conf);
}
const char *
named_config_getdefault(void) {
return defaultconf;
}
isc_result_t
named_config_get(cfg_obj_t const *const *maps, const char *name,
const cfg_obj_t **obj) {
int i;
for (i = 0; maps[i] != NULL; i++) {
if (cfg_map_get(maps[i], name, obj) == ISC_R_SUCCESS) {
return ISC_R_SUCCESS;
}
}
return ISC_R_NOTFOUND;
}
isc_result_t
named_checknames_get(const cfg_obj_t **maps, const char *const names[],
const cfg_obj_t **obj) {
const cfg_listelt_t *element;
const cfg_obj_t *checknames;
const cfg_obj_t *type;
const cfg_obj_t *value;
int i;
REQUIRE(maps != NULL);
REQUIRE(names != NULL);
REQUIRE(obj != NULL && *obj == NULL);
for (i = 0; maps[i] != NULL; i++) {
checknames = NULL;
if (cfg_map_get(maps[i], "check-names", &checknames) ==
ISC_R_SUCCESS)
{
/*
* Zone map entry is not a list.
*/
if (checknames != NULL && !cfg_obj_islist(checknames)) {
*obj = checknames;
return ISC_R_SUCCESS;
}
for (element = cfg_list_first(checknames);
element != NULL; element = cfg_list_next(element))
{
value = cfg_listelt_value(element);
type = cfg_tuple_get(value, "type");
for (size_t j = 0; names[j] != NULL; j++) {
if (strcasecmp(cfg_obj_asstring(type),
names[j]) == 0)
{
*obj = cfg_tuple_get(value,
"mode");
return ISC_R_SUCCESS;
}
}
}
}
}
return ISC_R_NOTFOUND;
}
int
named_config_listcount(const cfg_obj_t *list) {
const cfg_listelt_t *e;
int i = 0;
for (e = cfg_list_first(list); e != NULL; e = cfg_list_next(e)) {
i++;
}
return i;
}
isc_result_t
named_config_getclass(const cfg_obj_t *classobj, dns_rdataclass_t defclass,
dns_rdataclass_t *classp) {
isc_textregion_t r;
isc_result_t result;
if (!cfg_obj_isstring(classobj)) {
*classp = defclass;
return ISC_R_SUCCESS;
}
r.base = UNCONST(cfg_obj_asstring(classobj));
r.length = strlen(r.base);
result = dns_rdataclass_fromtext(classp, &r);
if (result != ISC_R_SUCCESS) {
cfg_obj_log(classobj, named_g_lctx, ISC_LOG_ERROR,
"unknown class '%s'", r.base);
}
return result;
}
isc_result_t
named_config_gettype(const cfg_obj_t *typeobj, dns_rdatatype_t deftype,
dns_rdatatype_t *typep) {
isc_textregion_t r;
isc_result_t result;
if (!cfg_obj_isstring(typeobj)) {
*typep = deftype;
return ISC_R_SUCCESS;
}
r.base = UNCONST(cfg_obj_asstring(typeobj));
r.length = strlen(r.base);
result = dns_rdatatype_fromtext(typep, &r);
if (result != ISC_R_SUCCESS) {
cfg_obj_log(typeobj, named_g_lctx, ISC_LOG_ERROR,
"unknown type '%s'", r.base);
}
return result;
}
dns_zonetype_t
named_config_getzonetype(const cfg_obj_t *zonetypeobj) {
dns_zonetype_t ztype = dns_zone_none;
const char *str;
str = cfg_obj_asstring(zonetypeobj);
if (strcasecmp(str, "primary") == 0 || strcasecmp(str, "master") == 0) {
ztype = dns_zone_primary;
} else if (strcasecmp(str, "secondary") == 0 ||
strcasecmp(str, "slave") == 0)
{
ztype = dns_zone_secondary;
} else if (strcasecmp(str, "mirror") == 0) {
ztype = dns_zone_mirror;
} else if (strcasecmp(str, "stub") == 0) {
ztype = dns_zone_stub;
} else if (strcasecmp(str, "static-stub") == 0) {
ztype = dns_zone_staticstub;
} else if (strcasecmp(str, "redirect") == 0) {
ztype = dns_zone_redirect;
} else {
UNREACHABLE();
}
return ztype;
}
isc_result_t
named_config_getremotesdef(const cfg_obj_t *cctx, const char *list,
const char *name, const cfg_obj_t **ret) {
isc_result_t result;
const cfg_obj_t *obj = NULL;
const cfg_listelt_t *elt;
REQUIRE(cctx != NULL);
REQUIRE(name != NULL);
REQUIRE(ret != NULL && *ret == NULL);
result = cfg_map_get(cctx, list, &obj);
if (result != ISC_R_SUCCESS) {
return result;
}
elt = cfg_list_first(obj);
while (elt != NULL) {
obj = cfg_listelt_value(elt);
if (strcasecmp(cfg_obj_asstring(cfg_tuple_get(obj, "name")),
name) == 0)
{
*ret = obj;
return ISC_R_SUCCESS;
}
elt = cfg_list_next(elt);
}
return ISC_R_NOTFOUND;
}
static isc_result_t
named_config_getname(isc_mem_t *mctx, const cfg_obj_t *obj,
dns_name_t **namep) {
REQUIRE(namep != NULL && *namep == NULL);
const char *objstr;
isc_result_t result;
isc_buffer_t b;
dns_fixedname_t fname;
if (!cfg_obj_isstring(obj)) {
*namep = NULL;
return ISC_R_SUCCESS;
}
*namep = isc_mem_get(mctx, sizeof(**namep));
dns_name_init(*namep, NULL);
objstr = cfg_obj_asstring(obj);
isc_buffer_constinit(&b, objstr, strlen(objstr));
isc_buffer_add(&b, strlen(objstr));
dns_fixedname_init(&fname);
result = dns_name_fromtext(dns_fixedname_name(&fname), &b, dns_rootname,
0, NULL);
if (result != ISC_R_SUCCESS) {
isc_mem_put(mctx, *namep, sizeof(**namep));
*namep = NULL;
return result;
}
dns_name_dup(dns_fixedname_name(&fname), mctx, *namep);
return ISC_R_SUCCESS;
}
#define grow_array(mctx, array, newlen, oldlen) \
if (newlen >= oldlen) { \
array = isc_mem_creget(mctx, array, oldlen, newlen + 16, \
sizeof(array[0])); \
oldlen = newlen + 16; \
}
#define shrink_array(mctx, array, newlen, oldlen) \
if (newlen < oldlen) { \
array = isc_mem_creget(mctx, array, oldlen, newlen, \
sizeof(array[0])); \
oldlen = newlen; \
}
static const char *remotesnames[4] = { "remote-servers", "parental-agents",
"primaries", "masters" };
typedef struct {
isc_sockaddr_t *addrs;
size_t addrsallocated;
isc_sockaddr_t *sources;
size_t sourcesallocated;
dns_name_t **keys;
size_t keysallocated;
dns_name_t **tlss;
size_t tlssallocated;
size_t count; /* common to addrs, sources, keys and tlss */
const char **seen;
size_t seencount;
size_t seenallocated;
} getipandkeylist_state_t;
static isc_result_t
getipandkeylist(in_port_t defport, in_port_t deftlsport,
const cfg_obj_t *config, const cfg_obj_t *list,
in_port_t listport, const cfg_obj_t *listkey,
const cfg_obj_t *listtls, isc_mem_t *mctx,
getipandkeylist_state_t *s) {
const cfg_obj_t *addrlist = cfg_tuple_get(list, "addresses");
const cfg_obj_t *portobj = cfg_tuple_get(list, "port");
const cfg_obj_t *src4obj = cfg_tuple_get(list, "source");
const cfg_obj_t *src6obj = cfg_tuple_get(list, "source-v6");
in_port_t port = (in_port_t)0;
isc_sockaddr_t src4;
isc_sockaddr_t src6;
isc_result_t result = ISC_R_SUCCESS;
if (cfg_obj_isuint32(portobj)) {
uint32_t val = cfg_obj_asuint32(portobj);
if (val > UINT16_MAX) {
cfg_obj_log(portobj, named_g_lctx, ISC_LOG_ERROR,
"port '%u' out of range", val);
return ISC_R_RANGE;
}
port = (in_port_t)val;
} else if (listport > 0) {
/*
* No port in the current list, but it is a list named elsewhere
* where the port is defined, i.e:
*
* remote-servers bar { 10.53.0.4; };
* remote-servers foo port 5555 { bar; 10.54.0.3; };
* ^^^
*
* The current list is the list `bar`, and the server
* `10.53.0.4` has the port `5555` defined.
*/
port = listport;
}
if (src4obj != NULL && cfg_obj_issockaddr(src4obj)) {
src4 = *cfg_obj_assockaddr(src4obj);
} else {
isc_sockaddr_any(&src4);
}
if (src6obj != NULL && cfg_obj_issockaddr(src6obj)) {
src6 = *cfg_obj_assockaddr(src6obj);
} else {
isc_sockaddr_any6(&src6);
}
for (const cfg_listelt_t *element = cfg_list_first(addrlist);
element != NULL; element = cfg_list_next(element))
{
const cfg_obj_t *addr;
const cfg_obj_t *key;
const cfg_obj_t *tls;
skiplist:
addr = cfg_tuple_get(cfg_listelt_value(element),
"remoteselement");
key = cfg_tuple_get(cfg_listelt_value(element), "key");
tls = cfg_tuple_get(cfg_listelt_value(element), "tls");
/*
* If this is not an address, this is the name of a nested list,
* i.e.
*
* remote-servers nestedlist { 10.53.0.4; };
* remote-servers list { nestedlist key foo; 10.54.0.6; };
* ^^^^^^^^^^^^^^^^^^
*
* We are currently in the list `list`, and `addr` is the name
* `nestedlist`, so we'll immediately recurse to process
* `nestedlist` before processing the next element of `list`.
*/
if (!cfg_obj_issockaddr(addr)) {
const char *listname = cfg_obj_asstring(addr);
const cfg_obj_t *nestedlist = NULL;
isc_result_t tresult;
for (size_t i = 0; i < s->seencount; i++) {
if (strcasecmp(s->seen[i], listname) == 0) {
element = cfg_list_next(element);
goto skiplist;
}
}
grow_array(mctx, s->seen, s->seencount,
s->seenallocated);
s->seen[s->seencount] = listname;
for (size_t i = 0; i < ARRAY_SIZE(remotesnames); i++) {
tresult = named_config_getremotesdef(
config, remotesnames[i], listname,
&nestedlist);
if (tresult == ISC_R_SUCCESS) {
break;
}
}
if (tresult != ISC_R_SUCCESS) {
cfg_obj_log(addr, named_g_lctx, ISC_LOG_ERROR,
"remote-servers \"%s\" not found",
listname);
return tresult;
}
result = getipandkeylist(defport, deftlsport, config,
nestedlist, port, key, tls,
mctx, s);
if (result != ISC_R_SUCCESS) {
goto out;
}
continue;
}
grow_array(mctx, s->addrs, s->count, s->addrsallocated);
grow_array(mctx, s->keys, s->count, s->keysallocated);
grow_array(mctx, s->tlss, s->count, s->tlssallocated);
grow_array(mctx, s->sources, s->count, s->sourcesallocated);
s->addrs[s->count] = *cfg_obj_assockaddr(addr);
result = named_config_getname(mctx, key, &s->keys[s->count]);
if (result != ISC_R_SUCCESS) {
goto out;
}
/*
* The `key` is not provided for this address, so, if we're
* inside a named list, get the `key` provided at the point the
* list is used.
*/
if (s->keys[s->count] == NULL && listkey != NULL) {
result = named_config_getname(mctx, listkey,
&s->keys[s->count]);
if (result != ISC_R_SUCCESS) {
goto out;
}
}
result = named_config_getname(mctx, tls, &s->tlss[s->count]);
if (result != ISC_R_SUCCESS) {
goto out;
}
/*
* The `tls` is not provided for this address, so, if we're
* inside a named list, get the `tls` provided at the point the
* named list is used.
*/
if (s->tlss[s->count] == NULL && listtls != NULL) {
result = named_config_getname(mctx, listtls,
&s->tlss[s->count]);
}
/* If the port is unset, take it from one of the upper levels */
if (isc_sockaddr_getport(&s->addrs[s->count]) == 0) {
in_port_t addr_port = port;
/* If unset, use the default port or tls-port */
if (addr_port == 0) {
if (s->tlss[s->count] != NULL) {
addr_port = deftlsport;
} else {
addr_port = defport;
}
}
isc_sockaddr_setport(&s->addrs[s->count], addr_port);
}
switch (isc_sockaddr_pf(&s->addrs[s->count])) {
case PF_INET:
s->sources[s->count] = src4;
break;
case PF_INET6:
s->sources[s->count] = src6;
break;
default:
result = ISC_R_NOTIMPLEMENTED;
goto out;
}
s->count++;
}
out:
if (result != ISC_R_SUCCESS) {
/*
* Reaching this point without success means we were in the
* middle of adding a new entry, so it needs to be counted for
* correctly free `s.keys` and `s.tlss` (as they potentially
* added a new element right before something fails)
*/
s->count++;
}
return result;
}
isc_result_t
named_config_getipandkeylist(const cfg_obj_t *config, const cfg_obj_t *list,
isc_mem_t *mctx, dns_ipkeylist_t *ipkl) {
isc_result_t result;
in_port_t def_port;
in_port_t def_tlsport;
getipandkeylist_state_t s = {};
REQUIRE(ipkl != NULL);
REQUIRE(ipkl->count == 0);
REQUIRE(ipkl->addrs == NULL);
REQUIRE(ipkl->keys == NULL);
REQUIRE(ipkl->tlss == NULL);
REQUIRE(ipkl->labels == NULL);
REQUIRE(ipkl->allocated == 0);
/*
* Get system defaults.
*/
result = named_config_getport(config, "port", &def_port);
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
result = named_config_getport(config, "tls-port", &def_tlsport);
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
/*
* Process the (nested) list(s).
*/
result = getipandkeylist(def_port, def_tlsport, config, list,
(in_port_t)0, NULL, NULL, mctx, &s);
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
shrink_array(mctx, s.addrs, s.count, s.addrsallocated);
shrink_array(mctx, s.keys, s.count, s.keysallocated);
shrink_array(mctx, s.tlss, s.count, s.tlssallocated);
shrink_array(mctx, s.sources, s.count, s.sourcesallocated);
ipkl->addrs = s.addrs;
ipkl->keys = s.keys;
ipkl->tlss = s.tlss;
ipkl->sources = s.sources;
ipkl->count = s.count;
INSIST(s.addrsallocated == s.keysallocated);
INSIST(s.addrsallocated == s.tlssallocated);
INSIST(s.addrsallocated == s.sourcesallocated);
ipkl->allocated = s.addrsallocated;
if (s.seen != NULL) {
/*
* `s.seen` is not shrinked (no point, as it's deleted right
* away anyway), so we need to use `s.seenallocated` to
* correctly free the array.
*/
isc_mem_cput(mctx, s.seen, s.seenallocated, sizeof(s.seen[0]));
}
return ISC_R_SUCCESS;
cleanup:
/*
* Because we didn't shrinked the array back in this path, we need to
* use `s.*allocated` to correctly free the allocated arrays.
*/
if (s.addrs != NULL) {
isc_mem_cput(mctx, s.addrs, s.count, sizeof(s.addrs[0]));
}
if (s.keys != NULL) {
for (size_t i = 0; i < s.count; i++) {
if (s.keys[i] == NULL) {
continue;
}
if (dns_name_dynamic(s.keys[i])) {
dns_name_free(s.keys[i], mctx);
}
isc_mem_put(mctx, s.keys[i], sizeof(*s.keys[i]));
}
isc_mem_cput(mctx, s.keys, s.keysallocated, sizeof(s.keys[0]));
}
if (s.tlss != NULL) {
for (size_t i = 0; i < s.count; i++) {
if (s.tlss[i] == NULL) {
continue;
}
if (dns_name_dynamic(s.tlss[i])) {
dns_name_free(s.tlss[i], mctx);
}
isc_mem_put(mctx, s.tlss[i], sizeof(*s.tlss[i]));
}
isc_mem_cput(mctx, s.tlss, s.tlssallocated, sizeof(s.tlss[0]));
}
if (s.sources != NULL) {
isc_mem_cput(mctx, s.sources, s.sourcesallocated,
sizeof(s.sources[0]));
}
if (s.seen != NULL) {
isc_mem_cput(mctx, s.seen, s.seenallocated, sizeof(s.seen[0]));
}
return result;
}
isc_result_t
named_config_getport(const cfg_obj_t *config, const char *type,
in_port_t *portp) {
const cfg_obj_t *maps[3];
const cfg_obj_t *options = NULL;
const cfg_obj_t *portobj = NULL;
isc_result_t result;
int i;
(void)cfg_map_get(config, "options", &options);
i = 0;
if (options != NULL) {
maps[i++] = options;
}
maps[i++] = named_g_defaults;
maps[i] = NULL;
result = named_config_get(maps, type, &portobj);
INSIST(result == ISC_R_SUCCESS);
if (cfg_obj_asuint32(portobj) >= UINT16_MAX) {
cfg_obj_log(portobj, named_g_lctx, ISC_LOG_ERROR,
"port '%u' out of range",
cfg_obj_asuint32(portobj));
return ISC_R_RANGE;
}
*portp = (in_port_t)cfg_obj_asuint32(portobj);
return ISC_R_SUCCESS;
}
struct keyalgorithms {
const char *str;
enum {
hmacnone,
hmacmd5,
hmacsha1,
hmacsha224,
hmacsha256,
hmacsha384,
hmacsha512
} hmac;
unsigned int type;
uint16_t size;
} algorithms[] = { { "hmac-md5", hmacmd5, DST_ALG_HMACMD5, 128 },
{ "hmac-md5.sig-alg.reg.int", hmacmd5, DST_ALG_HMACMD5, 0 },
{ "hmac-md5.sig-alg.reg.int.", hmacmd5, DST_ALG_HMACMD5, 0 },
{ "hmac-sha1", hmacsha1, DST_ALG_HMACSHA1, 160 },
{ "hmac-sha224", hmacsha224, DST_ALG_HMACSHA224, 224 },
{ "hmac-sha256", hmacsha256, DST_ALG_HMACSHA256, 256 },
{ "hmac-sha384", hmacsha384, DST_ALG_HMACSHA384, 384 },
{ "hmac-sha512", hmacsha512, DST_ALG_HMACSHA512, 512 },
{ NULL, hmacnone, DST_ALG_UNKNOWN, 0 } };
isc_result_t
named_config_getkeyalgorithm(const char *str, unsigned int *typep,
uint16_t *digestbits) {
int i;
size_t len = 0;
uint16_t bits;
isc_result_t result;
for (i = 0; algorithms[i].str != NULL; i++) {
len = strlen(algorithms[i].str);
if (strncasecmp(algorithms[i].str, str, len) == 0 &&
(str[len] == '\0' ||
(algorithms[i].size != 0 && str[len] == '-')))
{
break;
}
}
if (algorithms[i].str == NULL) {
return ISC_R_NOTFOUND;
}
if (str[len] == '-') {
result = isc_parse_uint16(&bits, str + len + 1, 10);
if (result != ISC_R_SUCCESS) {
return result;
}
if (bits > algorithms[i].size) {
return ISC_R_RANGE;
}
} else if (algorithms[i].size == 0) {
bits = 128;
} else {
bits = algorithms[i].size;
}
SET_IF_NOT_NULL(typep, algorithms[i].type);
SET_IF_NOT_NULL(digestbits, bits);
return ISC_R_SUCCESS;
}
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