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resolved: add the new KSK to the built-in resolved trust anchor (#5486)

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Fixes: #5482
This commit is contained in:
Lennart Poettering 2017-03-01 04:49:19 +01:00 committed by Zbigniew Jędrzejewski-Szmek
parent e350ca3f1e
commit 3401f0e145
1 changed files with 51 additions and 21 deletions
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72
src/resolve/resolved-dns-trust-anchor.c
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@ -35,11 +35,16 @@
static const char trust_anchor_dirs[] = CONF_PATHS_NULSTR("dnssec-trust-anchors.d");
/* The DS RR from https://data.iana.org/root-anchors/root-anchors.xml, retrieved December 2015 */
static const uint8_t root_digest[] =
/* The first DS RR from https://data.iana.org/root-anchors/root-anchors.xml, retrieved December 2015 */
static const uint8_t root_digest1[] =
{ 0x49, 0xAA, 0xC1, 0x1D, 0x7B, 0x6F, 0x64, 0x46, 0x70, 0x2E, 0x54, 0xA1, 0x60, 0x73, 0x71, 0x60,
0x7A, 0x1A, 0x41, 0x85, 0x52, 0x00, 0xFD, 0x2C, 0xE1, 0xCD, 0xDE, 0x32, 0xF2, 0x4E, 0x8F, 0xB5 };
/* The second DS RR from https://data.iana.org/root-anchors/root-anchors.xml, retrieved February 2017 */
static const uint8_t root_digest2[] =
{ 0xE0, 0x6D, 0x44, 0xB8, 0x0B, 0x8F, 0x1D, 0x39, 0xA9, 0x5C, 0x0B, 0x0D, 0x7C, 0x65, 0xD0, 0x84,
0x58, 0xE8, 0x80, 0x40, 0x9B, 0xBC, 0x68, 0x34, 0x57, 0x10, 0x42, 0x37, 0xC7, 0xF8, 0xEC, 0x8D };
static bool dns_trust_anchor_knows_domain_positive(DnsTrustAnchor *d, const char *name) {
assert(d);
@ -51,9 +56,40 @@ static bool dns_trust_anchor_knows_domain_positive(DnsTrustAnchor *d, const char
hashmap_contains(d->positive_by_key, &DNS_RESOURCE_KEY_CONST(DNS_CLASS_IN, DNS_TYPE_DS, name));
}
static int dns_trust_anchor_add_builtin_positive(DnsTrustAnchor *d) {
static int add_root_ksk(
DnsAnswer *answer,
DnsResourceKey *key,
uint16_t key_tag,
uint8_t algorithm,
uint8_t digest_type,
const void *digest,
size_t digest_size) {
_cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL;
int r;
rr = dns_resource_record_new(key);
if (!rr)
return -ENOMEM;
rr->ds.key_tag = key_tag;
rr->ds.algorithm = algorithm;
rr->ds.digest_type = digest_type;
rr->ds.digest_size = digest_size;
rr->ds.digest = memdup(digest, rr->ds.digest_size);
if (!rr->ds.digest)
return -ENOMEM;
r = dns_answer_add(answer, rr, 0, DNS_ANSWER_AUTHENTICATED);
if (r < 0)
return r;
return 0;
}
static int dns_trust_anchor_add_builtin_positive(DnsTrustAnchor *d) {
_cleanup_(dns_answer_unrefp) DnsAnswer *answer = NULL;
_cleanup_(dns_resource_key_unrefp) DnsResourceKey *key = NULL;
int r;
assert(d);
@ -62,35 +98,29 @@ static int dns_trust_anchor_add_builtin_positive(DnsTrustAnchor *d) {
if (r < 0)
return r;
/* Only add the built-in trust anchor if there's neither a DS
* nor a DNSKEY defined for the root domain. That way users
* have an easy way to override the root domain DS/DNSKEY
* data. */
/* Only add the built-in trust anchor if there's neither a DS nor a DNSKEY defined for the root domain. That
* way users have an easy way to override the root domain DS/DNSKEY data. */
if (dns_trust_anchor_knows_domain_positive(d, "."))
return 0;
/* Add the RR from https://data.iana.org/root-anchors/root-anchors.xml */
rr = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_DS, "");
if (!rr)
key = dns_resource_key_new(DNS_CLASS_IN, DNS_TYPE_DS, "");
if (!key)
return -ENOMEM;
rr->ds.key_tag = 19036;
rr->ds.algorithm = DNSSEC_ALGORITHM_RSASHA256;
rr->ds.digest_type = DNSSEC_DIGEST_SHA256;
rr->ds.digest_size = sizeof(root_digest);
rr->ds.digest = memdup(root_digest, rr->ds.digest_size);
if (!rr->ds.digest)
return -ENOMEM;
answer = dns_answer_new(1);
answer = dns_answer_new(2);
if (!answer)
return -ENOMEM;
r = dns_answer_add(answer, rr, 0, DNS_ANSWER_AUTHENTICATED);
/* Add the two RRs from https://data.iana.org/root-anchors/root-anchors.xml */
r = add_root_ksk(answer, key, 19036, DNSSEC_ALGORITHM_RSASHA256, DNSSEC_DIGEST_SHA256, root_digest1, sizeof(root_digest1));
if (r < 0)
return r;
r = hashmap_put(d->positive_by_key, rr->key, answer);
r = add_root_ksk(answer, key, 20326, DNSSEC_ALGORITHM_RSASHA256, DNSSEC_DIGEST_SHA256, root_digest2, sizeof(root_digest2));
if (r < 0)
return r;
r = hashmap_put(d->positive_by_key, key, answer);
if (r < 0)
return r;