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Merge pull request #9240 from poettering/ds-validate

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resolved: fix DNSKEY validation by DS RR
This commit is contained in:
Lennart Poettering 2018-06-08 20:44:01 +02:00 committed by GitHub
commit b5cbe199c7
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5 changed files with 13 additions and 9 deletions
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2
man/systemd-resolved.service.xml
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@ -79,7 +79,7 @@
<filename>/etc/systemd/resolved.conf</filename>, the per-link static settings in
<filename>/etc/systemd/network/*.network</filename> files (in case
<citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry> is
used), the per-link dynamic settings received over DHCP and any DNS server information made available by other
used), the per-link dynamic settings received over DHCP, and any DNS server information made available by other
system services. See
<citerefentry><refentrytitle>resolved.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry> and
<citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry> for details

2
src/libsystemd-network/dhcp6-option.c
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@ -141,7 +141,7 @@ int dhcp6_option_append_ia(uint8_t **buf, size_t *buflen, DHCP6IA *ia) {
}
int dhcp6_option_append_fqdn(uint8_t **buf, size_t *buflen, const char *fqdn) {
uint8_t buffer[1 + DNS_WIRE_FOMAT_HOSTNAME_MAX];
uint8_t buffer[1 + DNS_WIRE_FORMAT_HOSTNAME_MAX];
int r;
assert_return(buf && *buf && buflen && fqdn, -EINVAL);

12
src/resolve/resolved-dns-dnssec.c
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@ -700,7 +700,7 @@ int dnssec_verify_rrset(
usec_t realtime,
DnssecResult *result) {
uint8_t wire_format_name[DNS_WIRE_FOMAT_HOSTNAME_MAX];
uint8_t wire_format_name[DNS_WIRE_FORMAT_HOSTNAME_MAX];
DnsResourceRecord **list, *rr;
const char *source, *name;
_cleanup_(gcry_md_closep) gcry_md_hd_t md = NULL;
@ -1153,7 +1153,7 @@ static int digest_to_gcrypt_md(uint8_t algorithm) {
}
int dnssec_verify_dnskey_by_ds(DnsResourceRecord *dnskey, DnsResourceRecord *ds, bool mask_revoke) {
char owner_name[DNSSEC_CANONICAL_HOSTNAME_MAX];
uint8_t wire_format[DNS_WIRE_FORMAT_HOSTNAME_MAX];
_cleanup_(gcry_md_closep) gcry_md_hd_t md = NULL;
size_t hash_size;
int md_algorithm, r;
@ -1192,7 +1192,7 @@ int dnssec_verify_dnskey_by_ds(DnsResourceRecord *dnskey, DnsResourceRecord *ds,
if (ds->ds.digest_size != hash_size)
return 0;
r = dnssec_canonicalize(dns_resource_key_name(dnskey->key), owner_name, sizeof(owner_name));
r = dns_name_to_wire_format(dns_resource_key_name(dnskey->key), wire_format, sizeof(wire_format), true);
if (r < 0)
return r;
@ -1200,7 +1200,7 @@ int dnssec_verify_dnskey_by_ds(DnsResourceRecord *dnskey, DnsResourceRecord *ds,
if (!md)
return -EIO;
gcry_md_write(md, owner_name, r);
gcry_md_write(md, wire_format, r);
if (mask_revoke)
md_add_uint16(md, dnskey->dnskey.flags & ~DNSKEY_FLAG_REVOKE);
else
@ -1213,7 +1213,7 @@ int dnssec_verify_dnskey_by_ds(DnsResourceRecord *dnskey, DnsResourceRecord *ds,
if (!result)
return -EIO;
return memcmp(result, ds->ds.digest, ds->ds.digest_size) != 0;
return memcmp(result, ds->ds.digest, ds->ds.digest_size) == 0;
}
int dnssec_verify_dnskey_by_ds_search(DnsResourceRecord *dnskey, DnsAnswer *validated_ds) {
@ -1269,7 +1269,7 @@ static int nsec3_hash_to_gcrypt_md(uint8_t algorithm) {
}
int dnssec_nsec3_hash(DnsResourceRecord *nsec3, const char *name, void *ret) {
uint8_t wire_format[DNS_WIRE_FOMAT_HOSTNAME_MAX];
uint8_t wire_format[DNS_WIRE_FORMAT_HOSTNAME_MAX];
gcry_md_hd_t md = NULL;
size_t hash_size;
int algorithm;

4
src/resolve/test-dnssec-complex.c
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@ -146,6 +146,10 @@ int main(int argc, char* argv[]) {
test_rr_lookup(bus, ".wilda.rhybar.ecdsa.0skar.cz", DNS_TYPE_A, BUS_ERROR_DNSSEC_FAILED);
test_hostname_lookup(bus, ".wilda.rhybar.ecdsa.0skar.cz", AF_INET, BUS_ERROR_DNSSEC_FAILED);
/* Missing DS for DNSKEY */
test_rr_lookup(bus, "www.dnssec-bogus.sg", DNS_TYPE_A, BUS_ERROR_DNSSEC_FAILED);
test_hostname_lookup(bus, "www.dnssec-bogus.sg", AF_INET, BUS_ERROR_DNSSEC_FAILED);
/* NXDOMAIN in NSEC domain */
test_rr_lookup(bus, "hhh.nasa.gov", DNS_TYPE_A, _BUS_ERROR_DNS "NXDOMAIN");
test_hostname_lookup(bus, "hhh.nasa.gov", AF_UNSPEC, _BUS_ERROR_DNS "NXDOMAIN");

2
src/shared/dns-domain.h
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@ -25,7 +25,7 @@
#define DNS_HOSTNAME_MAX 253
/* Maximum length of a full hostname, on the wire, including the final NUL byte */
#define DNS_WIRE_FOMAT_HOSTNAME_MAX 255
#define DNS_WIRE_FORMAT_HOSTNAME_MAX 255
/* Maximum number of labels per valid hostname */
#define DNS_N_LABELS_MAX 127