int dns_trust_anchor_load(DnsTrustAnchor *d) {
_cleanup_(dns_resource_record_unrefp) DnsResourceRecord *rr = NULL;
_cleanup_(dns_answer_unrefp) DnsAnswer *answer = NULL;
int r;
assert(d);
r = hashmap_ensure_allocated(&d->by_key, &dns_resource_key_hash_ops);
if (r < 0)
return r;
if (hashmap_get(d->by_key, &DNS_RESOURCE_KEY_CONST(DNS_CLASS_IN, DNS_TYPE_DS, ".")))
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)
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);
if (!answer)
return -ENOMEM;
r = dns_answer_add(answer, rr, 0);
if (r < 0)
return r;
r = hashmap_put(d->by_key, rr->key, answer);
if (r < 0)
return r;
answer = NULL;
return 0;
}
static void test_dnssec_verify_rrset2(void) {
static const uint8_t signature_blob[] = {
0x48, 0x45, 0xc8, 0x8b, 0xc0, 0x14, 0x92, 0xf5, 0x15, 0xc6, 0x84, 0x9d, 0x2f, 0xe3, 0x32, 0x11,
0x7d, 0xf1, 0xe6, 0x87, 0xb9, 0x42, 0xd3, 0x8b, 0x9e, 0xaf, 0x92, 0x31, 0x0a, 0x53, 0xad, 0x8b,
0xa7, 0x5c, 0x83, 0x39, 0x8c, 0x28, 0xac, 0xce, 0x6e, 0x9c, 0x18, 0xe3, 0x31, 0x16, 0x6e, 0xca,
0x38, 0x31, 0xaf, 0xd9, 0x94, 0xf1, 0x84, 0xb1, 0xdf, 0x5a, 0xc2, 0x73, 0x22, 0xf6, 0xcb, 0xa2,
0xe7, 0x8c, 0x77, 0x0c, 0x74, 0x2f, 0xc2, 0x13, 0xb0, 0x93, 0x51, 0xa9, 0x4f, 0xae, 0x0a, 0xda,
0x45, 0xcc, 0xfd, 0x43, 0x99, 0x36, 0x9a, 0x0d, 0x21, 0xe0, 0xeb, 0x30, 0x65, 0xd4, 0xa0, 0x27,
0x37, 0x3b, 0xe4, 0xc1, 0xc5, 0xa1, 0x2a, 0xd1, 0x76, 0xc4, 0x7e, 0x64, 0x0e, 0x5a, 0xa6, 0x50,
0x24, 0xd5, 0x2c, 0xcc, 0x6d, 0xe5, 0x37, 0xea, 0xbd, 0x09, 0x34, 0xed, 0x24, 0x06, 0xa1, 0x22,
};
static const uint8_t dnskey_blob[] = {
0x03, 0x01, 0x00, 0x01, 0xc3, 0x7f, 0x1d, 0xd1, 0x1c, 0x97, 0xb1, 0x13, 0x34, 0x3a, 0x9a, 0xea,
0xee, 0xd9, 0x5a, 0x11, 0x1b, 0x17, 0xc7, 0xe3, 0xd4, 0xda, 0x20, 0xbc, 0x5d, 0xba, 0x74, 0xe3,
0x37, 0x99, 0xec, 0x25, 0xce, 0x93, 0x7f, 0xbd, 0x22, 0x73, 0x7e, 0x14, 0x71, 0xe0, 0x60, 0x07,
0xd4, 0x39, 0x8b, 0x5e, 0xe9, 0xba, 0x25, 0xe8, 0x49, 0xe9, 0x34, 0xef, 0xfe, 0x04, 0x5c, 0xa5,
0x27, 0xcd, 0xa9, 0xda, 0x70, 0x05, 0x21, 0xab, 0x15, 0x82, 0x24, 0xc3, 0x94, 0xf5, 0xd7, 0xb7,
0xc4, 0x66, 0xcb, 0x32, 0x6e, 0x60, 0x2b, 0x55, 0x59, 0x28, 0x89, 0x8a, 0x72, 0xde, 0x88, 0x56,
0x27, 0x95, 0xd9, 0xac, 0x88, 0x4f, 0x65, 0x2b, 0x68, 0xfc, 0xe6, 0x41, 0xc1, 0x1b, 0xef, 0x4e,
0xd6, 0xc2, 0x0f, 0x64, 0x88, 0x95, 0x5e, 0xdd, 0x3a, 0x02, 0x07, 0x50, 0xa9, 0xda, 0xa4, 0x49,
0x74, 0x62, 0xfe, 0xd7,
};
_cleanup_(dns_resource_record_unrefp) DnsResourceRecord *nsec = NULL, *rrsig = NULL, *dnskey = NULL;
_cleanup_(dns_answer_unrefp) DnsAnswer *answer = NULL;
DnssecResult result;
nsec = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_NSEC, "nasa.gov");
assert_se(nsec);
nsec->nsec.next_domain_name = strdup("3D-Printing.nasa.gov");
assert_se(nsec->nsec.next_domain_name);
nsec->nsec.types = bitmap_new();
assert_se(nsec->nsec.types);
assert_se(bitmap_set(nsec->nsec.types, DNS_TYPE_A) >= 0);
assert_se(bitmap_set(nsec->nsec.types, DNS_TYPE_NS) >= 0);
assert_se(bitmap_set(nsec->nsec.types, DNS_TYPE_SOA) >= 0);
assert_se(bitmap_set(nsec->nsec.types, DNS_TYPE_MX) >= 0);
assert_se(bitmap_set(nsec->nsec.types, DNS_TYPE_TXT) >= 0);
assert_se(bitmap_set(nsec->nsec.types, DNS_TYPE_RRSIG) >= 0);
assert_se(bitmap_set(nsec->nsec.types, DNS_TYPE_NSEC) >= 0);
assert_se(bitmap_set(nsec->nsec.types, DNS_TYPE_DNSKEY) >= 0);
assert_se(bitmap_set(nsec->nsec.types, 65534) >= 0);
log_info("NSEC: %s", strna(dns_resource_record_to_string(nsec)));
rrsig = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_RRSIG, "NaSa.GOV.");
assert_se(rrsig);
rrsig->rrsig.type_covered = DNS_TYPE_NSEC;
rrsig->rrsig.algorithm = DNSSEC_ALGORITHM_RSASHA256;
rrsig->rrsig.labels = 2;
rrsig->rrsig.original_ttl = 300;
rrsig->rrsig.expiration = 0x5689002f;
rrsig->rrsig.inception = 0x56617230;
rrsig->rrsig.key_tag = 30390;
rrsig->rrsig.signer = strdup("Nasa.Gov.");
assert_se(rrsig->rrsig.signer);
rrsig->rrsig.signature_size = sizeof(signature_blob);
rrsig->rrsig.signature = memdup(signature_blob, rrsig->rrsig.signature_size);
assert_se(rrsig->rrsig.signature);
log_info("RRSIG: %s", strna(dns_resource_record_to_string(rrsig)));
dnskey = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_DNSKEY, "nASA.gOV");
assert_se(dnskey);
dnskey->dnskey.flags = 256;
dnskey->dnskey.protocol = 3;
dnskey->dnskey.algorithm = DNSSEC_ALGORITHM_RSASHA256;
dnskey->dnskey.key_size = sizeof(dnskey_blob);
dnskey->dnskey.key = memdup(dnskey_blob, sizeof(dnskey_blob));
assert_se(dnskey->dnskey.key);
log_info("DNSKEY: %s", strna(dns_resource_record_to_string(dnskey)));
log_info("DNSKEY keytag: %u", dnssec_keytag(dnskey, false));
assert_se(dnssec_key_match_rrsig(nsec->key, rrsig) > 0);
assert_se(dnssec_rrsig_match_dnskey(rrsig, dnskey, false) > 0);
answer = dns_answer_new(1);
assert_se(answer);
assert_se(dns_answer_add(answer, nsec, 0, DNS_ANSWER_AUTHENTICATED) >= 0);
/* Validate the RR as it if was 2015-12-11 today */
assert_se(dnssec_verify_rrset(answer, nsec->key, rrsig, dnskey, 1449849318*USEC_PER_SEC, &result) >= 0);
assert_se(result == DNSSEC_VALIDATED);
}
static void test_dnssec_verify_rrset(void) {
static const uint8_t signature_blob[] = {
0x7f, 0x79, 0xdd, 0x5e, 0x89, 0x79, 0x18, 0xd0, 0x34, 0x86, 0x8c, 0x72, 0x77, 0x75, 0x48, 0x4d,
0xc3, 0x7d, 0x38, 0x04, 0xab, 0xcd, 0x9e, 0x4c, 0x82, 0xb0, 0x92, 0xca, 0xe9, 0x66, 0xe9, 0x6e,
0x47, 0xc7, 0x68, 0x8c, 0x94, 0xf6, 0x69, 0xcb, 0x75, 0x94, 0xe6, 0x30, 0xa6, 0xfb, 0x68, 0x64,
0x96, 0x1a, 0x84, 0xe1, 0xdc, 0x16, 0x4c, 0x83, 0x6c, 0x44, 0xf2, 0x74, 0x4d, 0x74, 0x79, 0x8f,
0xf3, 0xf4, 0x63, 0x0d, 0xef, 0x5a, 0xe7, 0xe2, 0xfd, 0xf2, 0x2b, 0x38, 0x7c, 0x28, 0x96, 0x9d,
0xb6, 0xcd, 0x5c, 0x3b, 0x57, 0xe2, 0x24, 0x78, 0x65, 0xd0, 0x9e, 0x77, 0x83, 0x09, 0x6c, 0xff,
0x3d, 0x52, 0x3f, 0x6e, 0xd1, 0xed, 0x2e, 0xf9, 0xee, 0x8e, 0xa6, 0xbe, 0x9a, 0xa8, 0x87, 0x76,
0xd8, 0x77, 0xcc, 0x96, 0xa0, 0x98, 0xa1, 0xd1, 0x68, 0x09, 0x43, 0xcf, 0x56, 0xd9, 0xd1, 0x66,
};
static const uint8_t dnskey_blob[] = {
0x03, 0x01, 0x00, 0x01, 0x9b, 0x49, 0x9b, 0xc1, 0xf9, 0x9a, 0xe0, 0x4e, 0xcf, 0xcb, 0x14, 0x45,
0x2e, 0xc9, 0xf9, 0x74, 0xa7, 0x18, 0xb5, 0xf3, 0xde, 0x39, 0x49, 0xdf, 0x63, 0x33, 0x97, 0x52,
0xe0, 0x8e, 0xac, 0x50, 0x30, 0x8e, 0x09, 0xd5, 0x24, 0x3d, 0x26, 0xa4, 0x49, 0x37, 0x2b, 0xb0,
0x6b, 0x1b, 0xdf, 0xde, 0x85, 0x83, 0xcb, 0x22, 0x4e, 0x60, 0x0a, 0x91, 0x1a, 0x1f, 0xc5, 0x40,
0xb1, 0xc3, 0x15, 0xc1, 0x54, 0x77, 0x86, 0x65, 0x53, 0xec, 0x10, 0x90, 0x0c, 0x91, 0x00, 0x5e,
0x15, 0xdc, 0x08, 0x02, 0x4c, 0x8c, 0x0d, 0xc0, 0xac, 0x6e, 0xc4, 0x3e, 0x1b, 0x80, 0x19, 0xe4,
0xf7, 0x5f, 0x77, 0x51, 0x06, 0x87, 0x61, 0xde, 0xa2, 0x18, 0x0f, 0x40, 0x8b, 0x79, 0x72, 0xfa,
0x8d, 0x1a, 0x44, 0x47, 0x0d, 0x8e, 0x3a, 0x2d, 0xc7, 0x39, 0xbf, 0x56, 0x28, 0x97, 0xd9, 0x20,
0x4f, 0x00, 0x51, 0x3b,
};
_cleanup_(dns_resource_record_unrefp) DnsResourceRecord *a = NULL, *rrsig = NULL, *dnskey = NULL;
_cleanup_(dns_answer_unrefp) DnsAnswer *answer = NULL;
DnssecResult result;
a = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_A, "nAsA.gov");
assert_se(a);
a->a.in_addr.s_addr = inet_addr("52.0.14.116");
log_info("A: %s", strna(dns_resource_record_to_string(a)));
rrsig = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_RRSIG, "NaSa.GOV.");
assert_se(rrsig);
rrsig->rrsig.type_covered = DNS_TYPE_A;
rrsig->rrsig.algorithm = DNSSEC_ALGORITHM_RSASHA256;
rrsig->rrsig.labels = 2;
rrsig->rrsig.original_ttl = 600;
rrsig->rrsig.expiration = 0x5683135c;
rrsig->rrsig.inception = 0x565b7da8;
rrsig->rrsig.key_tag = 63876;
rrsig->rrsig.signer = strdup("Nasa.Gov.");
assert_se(rrsig->rrsig.signer);
rrsig->rrsig.signature_size = sizeof(signature_blob);
rrsig->rrsig.signature = memdup(signature_blob, rrsig->rrsig.signature_size);
assert_se(rrsig->rrsig.signature);
log_info("RRSIG: %s", strna(dns_resource_record_to_string(rrsig)));
dnskey = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_DNSKEY, "nASA.gOV");
assert_se(dnskey);
dnskey->dnskey.flags = 256;
dnskey->dnskey.protocol = 3;
dnskey->dnskey.algorithm = DNSSEC_ALGORITHM_RSASHA256;
dnskey->dnskey.key_size = sizeof(dnskey_blob);
dnskey->dnskey.key = memdup(dnskey_blob, sizeof(dnskey_blob));
assert_se(dnskey->dnskey.key);
log_info("DNSKEY: %s", strna(dns_resource_record_to_string(dnskey)));
log_info("DNSKEY keytag: %u", dnssec_keytag(dnskey, false));
assert_se(dnssec_key_match_rrsig(a->key, rrsig) > 0);
assert_se(dnssec_rrsig_match_dnskey(rrsig, dnskey, false) > 0);
answer = dns_answer_new(1);
assert_se(answer);
assert_se(dns_answer_add(answer, a, 0, DNS_ANSWER_AUTHENTICATED) >= 0);
/* Validate the RR as it if was 2015-12-2 today */
assert_se(dnssec_verify_rrset(answer, a->key, rrsig, dnskey, 1449092754*USEC_PER_SEC, &result) >= 0);
assert_se(result == DNSSEC_VALIDATED);
}
static void test_dnssec_verify_rfc8080_ed25519_example2(void) {
static const uint8_t dnskey_blob[] = {
0xcc, 0xf9, 0xd9, 0xfd, 0x0c, 0x04, 0x7b, 0xb4, 0xbc, 0x0b, 0x94, 0x8f, 0xcf, 0x63, 0x9f,
0x4b, 0x94, 0x51, 0xe3, 0x40, 0x13, 0x93, 0x6f, 0xeb, 0x62, 0x71, 0x3d, 0xc4, 0x72, 0x4,
0x8a, 0x3b
};
static const uint8_t ds_fprint[] = {
0xe3, 0x4d, 0x7b, 0xf3, 0x56, 0xfd, 0xdf, 0x87, 0xb7, 0xf7, 0x67, 0x5e, 0xe3, 0xdd, 0x9e,
0x73, 0xbe, 0xda, 0x7b, 0x67, 0xb5, 0xe5, 0xde, 0xf4, 0x7f, 0xae, 0x7b, 0xe5, 0xad, 0x5c,
0xd1, 0xb7, 0x39, 0xf5, 0xce, 0x76, 0xef, 0x97, 0x34, 0xe1, 0xe6, 0xde, 0xf3, 0x47, 0x3a,
0xeb, 0x5e, 0x1c
};
static const uint8_t signature_blob[] = {
0xcd, 0x74, 0x34, 0x6e, 0x46, 0x20, 0x41, 0x31, 0x05, 0xc9, 0xf2, 0xf2, 0x8b, 0xd4, 0x28,
0x89, 0x8e, 0x83, 0xf1, 0x97, 0x58, 0xa3, 0x8c, 0x32, 0x52, 0x15, 0x62, 0xa1, 0x86, 0x57,
0x15, 0xd4, 0xf8, 0xd7, 0x44, 0x0f, 0x44, 0x84, 0xd0, 0x4a, 0xa2, 0x52, 0x9f, 0x34, 0x28,
0x4a, 0x6e, 0x69, 0xa0, 0x9e, 0xe0, 0x0f, 0xb0, 0x10, 0x47, 0x43, 0xbb, 0x2a, 0xe2, 0x39,
0x93, 0x6a, 0x5c, 0x06
};
_cleanup_(dns_resource_record_unrefp) DnsResourceRecord *dnskey = NULL, *ds = NULL, *mx = NULL,
*rrsig = NULL;
_cleanup_(dns_answer_unrefp) DnsAnswer *answer = NULL;
DnssecResult result;
dnskey = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_DNSKEY, "example.com.");
assert_se(dnskey);
dnskey->dnskey.flags = 257;
dnskey->dnskey.protocol = 3;
dnskey->dnskey.algorithm = DNSSEC_ALGORITHM_ED25519;
dnskey->dnskey.key_size = sizeof(dnskey_blob);
dnskey->dnskey.key = memdup(dnskey_blob, sizeof(dnskey_blob));
assert_se(dnskey->dnskey.key);
log_info("DNSKEY: %s", strna(dns_resource_record_to_string(dnskey)));
ds = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_DS, "example.com.");
assert_se(ds);
ds->ds.key_tag = 35217;
ds->ds.algorithm = DNSSEC_ALGORITHM_ED25519;
ds->ds.digest_type = DNSSEC_DIGEST_SHA256;
ds->ds.digest_size = sizeof(ds_fprint);
ds->ds.digest = memdup(ds_fprint, ds->ds.digest_size);
assert_se(ds->ds.digest);
log_info("DS: %s", strna(dns_resource_record_to_string(ds)));
mx = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_MX, "example.com.");
assert_se(mx);
mx->mx.priority = 10;
mx->mx.exchange = strdup("mail.example.com.");
assert_se(mx->mx.exchange);
log_info("MX: %s", strna(dns_resource_record_to_string(mx)));
rrsig = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_RRSIG, "example.com.");
assert_se(rrsig);
rrsig->rrsig.type_covered = DNS_TYPE_MX;
rrsig->rrsig.algorithm = DNSSEC_ALGORITHM_ED25519;
rrsig->rrsig.labels = 2;
rrsig->rrsig.original_ttl = 3600;
rrsig->rrsig.expiration = 1440021600;
rrsig->rrsig.inception = 1438207200;
rrsig->rrsig.key_tag = 35217;
rrsig->rrsig.signer = strdup("example.com.");
assert_se(rrsig->rrsig.signer);
rrsig->rrsig.signature_size = sizeof(signature_blob);
rrsig->rrsig.signature = memdup(signature_blob, rrsig->rrsig.signature_size);
assert_se(rrsig->rrsig.signature);
log_info("RRSIG: %s", strna(dns_resource_record_to_string(rrsig)));
assert_se(dnssec_key_match_rrsig(mx->key, rrsig) > 0);
assert_se(dnssec_rrsig_match_dnskey(rrsig, dnskey, false) > 0);
answer = dns_answer_new(1);
assert_se(answer);
assert_se(dns_answer_add(answer, mx, 0, DNS_ANSWER_AUTHENTICATED) >= 0);
assert_se(dnssec_verify_rrset(answer, mx->key, rrsig, dnskey,
rrsig->rrsig.inception * USEC_PER_SEC, &result) >= 0);
#if GCRYPT_VERSION_NUMBER >= 0x010600
assert_se(result == DNSSEC_VALIDATED);
#else
assert_se(result == DNSSEC_UNSUPPORTED_ALGORITHM);
#endif
}
static void test_dnssec_verify_rfc8080_ed25519_example1(void) {
static const uint8_t dnskey_blob[] = {
0x97, 0x4d, 0x96, 0xa2, 0x2d, 0x22, 0x4b, 0xc0, 0x1a, 0xdb, 0x91, 0x50, 0x91, 0x47, 0x7d,
0x44, 0xcc, 0xd9, 0x1c, 0x9a, 0x41, 0xa1, 0x14, 0x30, 0x01, 0x01, 0x17, 0xd5, 0x2c, 0x59,
0x24, 0xe
};
static const uint8_t ds_fprint[] = {
0xdd, 0xa6, 0xb9, 0x69, 0xbd, 0xfb, 0x79, 0xf7, 0x1e, 0xe7, 0xb7, 0xfb, 0xdf, 0xb7, 0xdc,
0xd7, 0xad, 0xbb, 0xd3, 0x5d, 0xdf, 0x79, 0xed, 0x3b, 0x6d, 0xd7, 0xf6, 0xe3, 0x56, 0xdd,
0xd7, 0x47, 0xf7, 0x6f, 0x5f, 0x7a, 0xe1, 0xa6, 0xf9, 0xe5, 0xce, 0xfc, 0x7b, 0xbf, 0x5a,
0xdf, 0x4e, 0x1b
};
static const uint8_t signature_blob[] = {
0xa0, 0xbf, 0x64, 0xac, 0x9b, 0xa7, 0xef, 0x17, 0xc1, 0x38, 0x85, 0x9c, 0x18, 0x78, 0xbb,
0x99, 0xa8, 0x39, 0xfe, 0x17, 0x59, 0xac, 0xa5, 0xb0, 0xd7, 0x98, 0xcf, 0x1a, 0xb1, 0xe9,
0x8d, 0x07, 0x91, 0x02, 0xf4, 0xdd, 0xb3, 0x36, 0x8f, 0x0f, 0xe4, 0x0b, 0xb3, 0x77, 0xf1,
0xf0, 0x0e, 0x0c, 0xdd, 0xed, 0xb7, 0x99, 0x16, 0x7d, 0x56, 0xb6, 0xe9, 0x32, 0x78, 0x30,
0x72, 0xba, 0x8d, 0x02
};
_cleanup_(dns_resource_record_unrefp) DnsResourceRecord *dnskey = NULL, *ds = NULL, *mx = NULL,
*rrsig = NULL;
_cleanup_(dns_answer_unrefp) DnsAnswer *answer = NULL;
DnssecResult result;
dnskey = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_DNSKEY, "example.com.");
assert_se(dnskey);
dnskey->dnskey.flags = 257;
dnskey->dnskey.protocol = 3;
dnskey->dnskey.algorithm = DNSSEC_ALGORITHM_ED25519;
dnskey->dnskey.key_size = sizeof(dnskey_blob);
dnskey->dnskey.key = memdup(dnskey_blob, sizeof(dnskey_blob));
assert_se(dnskey->dnskey.key);
log_info("DNSKEY: %s", strna(dns_resource_record_to_string(dnskey)));
ds = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_DS, "example.com.");
assert_se(ds);
ds->ds.key_tag = 3613;
ds->ds.algorithm = DNSSEC_ALGORITHM_ED25519;
ds->ds.digest_type = DNSSEC_DIGEST_SHA256;
ds->ds.digest_size = sizeof(ds_fprint);
ds->ds.digest = memdup(ds_fprint, ds->ds.digest_size);
assert_se(ds->ds.digest);
log_info("DS: %s", strna(dns_resource_record_to_string(ds)));
mx = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_MX, "example.com.");
assert_se(mx);
mx->mx.priority = 10;
mx->mx.exchange = strdup("mail.example.com.");
assert_se(mx->mx.exchange);
log_info("MX: %s", strna(dns_resource_record_to_string(mx)));
rrsig = dns_resource_record_new_full(DNS_CLASS_IN, DNS_TYPE_RRSIG, "example.com.");
assert_se(rrsig);
rrsig->rrsig.type_covered = DNS_TYPE_MX;
rrsig->rrsig.algorithm = DNSSEC_ALGORITHM_ED25519;
rrsig->rrsig.labels = 2;
rrsig->rrsig.original_ttl = 3600;
rrsig->rrsig.expiration = 1440021600;
rrsig->rrsig.inception = 1438207200;
rrsig->rrsig.key_tag = 3613;
rrsig->rrsig.signer = strdup("example.com.");
assert_se(rrsig->rrsig.signer);
rrsig->rrsig.signature_size = sizeof(signature_blob);
rrsig->rrsig.signature = memdup(signature_blob, rrsig->rrsig.signature_size);
assert_se(rrsig->rrsig.signature);
log_info("RRSIG: %s", strna(dns_resource_record_to_string(rrsig)));
assert_se(dnssec_key_match_rrsig(mx->key, rrsig) > 0);
assert_se(dnssec_rrsig_match_dnskey(rrsig, dnskey, false) > 0);
answer = dns_answer_new(1);
assert_se(answer);
assert_se(dns_answer_add(answer, mx, 0, DNS_ANSWER_AUTHENTICATED) >= 0);
assert_se(dnssec_verify_rrset(answer, mx->key, rrsig, dnskey,
rrsig->rrsig.inception * USEC_PER_SEC, &result) >= 0);
#if GCRYPT_VERSION_NUMBER >= 0x010600
assert_se(result == DNSSEC_VALIDATED);
#else
assert_se(result == DNSSEC_UNSUPPORTED_ALGORITHM);
#endif
}