/** match edns sections */
static int
match_edns(ldns_pkt* q, ldns_pkt* p)
{
if(ldns_pkt_edns_udp_size(q) != ldns_pkt_edns_udp_size(p))
return 0;
if(ldns_pkt_edns_extended_rcode(q) != ldns_pkt_edns_extended_rcode(p))
return 0;
if(ldns_pkt_edns_version(q) != ldns_pkt_edns_version(p))
return 0;
if(ldns_pkt_edns_do(q) != ldns_pkt_edns_do(p))
return 0;
if(ldns_pkt_edns_z(q) != ldns_pkt_edns_z(p))
return 0;
if(ldns_rdf_compare(ldns_pkt_edns_data(q), ldns_pkt_edns_data(p)) != 0)
return 0;
return 1;
}
bool
ldns_pkt_tsig_verify_next(ldns_pkt *pkt, uint8_t *wire, size_t wirelen, const char* key_name,
const char *key_data, ldns_rdf *orig_mac_rdf, int tsig_timers_only)
{
ldns_rdf *fudge_rdf;
ldns_rdf *algorithm_rdf;
ldns_rdf *time_signed_rdf;
ldns_rdf *orig_id_rdf;
ldns_rdf *error_rdf;
ldns_rdf *other_data_rdf;
ldns_rdf *pkt_mac_rdf;
ldns_rdf *my_mac_rdf;
ldns_rdf *key_name_rdf = ldns_rdf_new_frm_str(LDNS_RDF_TYPE_DNAME, key_name);
uint16_t pkt_id, orig_pkt_id;
ldns_status status;
uint8_t *prepared_wire = NULL;
size_t prepared_wire_size = 0;
ldns_rr *orig_tsig = ldns_pkt_tsig(pkt);
if (!orig_tsig || ldns_rr_rd_count(orig_tsig) <= 6) {
ldns_rdf_deep_free(key_name_rdf);
return false;
}
algorithm_rdf = ldns_rr_rdf(orig_tsig, 0);
time_signed_rdf = ldns_rr_rdf(orig_tsig, 1);
fudge_rdf = ldns_rr_rdf(orig_tsig, 2);
pkt_mac_rdf = ldns_rr_rdf(orig_tsig, 3);
orig_id_rdf = ldns_rr_rdf(orig_tsig, 4);
error_rdf = ldns_rr_rdf(orig_tsig, 5);
other_data_rdf = ldns_rr_rdf(orig_tsig, 6);
/* remove temporarily */
ldns_pkt_set_tsig(pkt, NULL);
/* temporarily change the id to the original id */
pkt_id = ldns_pkt_id(pkt);
orig_pkt_id = ldns_rdf2native_int16(orig_id_rdf);
ldns_pkt_set_id(pkt, orig_pkt_id);
prepared_wire = ldns_tsig_prepare_pkt_wire(wire, wirelen, &prepared_wire_size);
status = ldns_tsig_mac_new(&my_mac_rdf, prepared_wire, prepared_wire_size,
key_data, key_name_rdf, fudge_rdf, algorithm_rdf,
time_signed_rdf, error_rdf, other_data_rdf, orig_mac_rdf, tsig_timers_only);
LDNS_FREE(prepared_wire);
if (status != LDNS_STATUS_OK) {
ldns_rdf_deep_free(key_name_rdf);
return false;
}
/* Put back the values */
ldns_pkt_set_tsig(pkt, orig_tsig);
ldns_pkt_set_id(pkt, pkt_id);
ldns_rdf_deep_free(key_name_rdf);
if (ldns_rdf_compare(pkt_mac_rdf, my_mac_rdf) == 0) {
ldns_rdf_deep_free(my_mac_rdf);
return true;
} else {
ldns_rdf_deep_free(my_mac_rdf);
return false;
}
}
static int cmp_domain(const void* a, const void* b)
{
struct zdomain_t* x = (struct zdomain_t*)a;
struct zdomain_t* y = (struct zdomain_t*)b;
return ldns_rdf_compare(x->name, y->name);
}
/* return a clone of the given rr list, without the glue records
* rr list should be the complete zone
* if present, stripped records are added to the list *glue_records
*/
ldns_rr_list *
ldns_zone_strip_glue_rrs(const ldns_rdf *zone_name, const ldns_rr_list *rrs, ldns_rr_list *glue_rrs)
{
ldns_rr_list *new_list = ldns_rr_list_new();
/* when do we find glue? It means we find an IP address
* (AAAA/A) for a nameserver listed in the zone
*
* Alg used here:
* first find all the zonecuts (NS records)
* find all the AAAA or A records (can be done it the
* above loop).
*
* Check if the aaaa/a list are subdomains under the
* NS domains. If yes -> glue, if no -> not glue
*/
ldns_rr_list *zone_cuts;
ldns_rr_list *addr;
ldns_rr *r, *ns, *a;
ldns_rdf *dname_a, *dname_ns, *ns_owner;
uint16_t i,j;
zone_cuts = ldns_rr_list_new();
addr = ldns_rr_list_new();
for(i = 0; i < ldns_rr_list_rr_count(rrs); i++) {
r = ldns_rr_list_rr(rrs, i);
if (ldns_rr_get_type(r) == LDNS_RR_TYPE_A ||
ldns_rr_get_type(r) == LDNS_RR_TYPE_AAAA) {
/* possibly glue */
ldns_rr_list_push_rr(addr, r);
continue;
}
if (ldns_rr_get_type(r) == LDNS_RR_TYPE_NS) {
/* multiple zones will end up here -
* for now; not a problem
*/
/* don't add NS records for the current zone itself */
if (ldns_rdf_compare(ldns_rr_owner(r),
zone_name) != 0) {
ldns_rr_list_push_rr(zone_cuts, r);
}
continue;
}
}
/* will sorting make it quicker ?? */
for(i = 0; i < ldns_rr_list_rr_count(zone_cuts); i++) {
ns = ldns_rr_list_rr(zone_cuts, i);
ns_owner = ldns_rr_owner(ns);
dname_ns = ldns_rr_ns_nsdname(ns);
for(j = 0; j < ldns_rr_list_rr_count(addr); j++) {
a = ldns_rr_list_rr(addr, j);
dname_a = ldns_rr_owner(a);
if (ldns_dname_is_subdomain(dname_a, ns_owner) &&
ldns_rdf_compare(dname_ns, dname_a) == 0) {
/* GLUE! */
if (glue_rrs) {
ldns_rr_list_push_rr(glue_rrs, a);
}
break;
} else {
ldns_rr_list_push_rr(new_list, a);
}
}
}
ldns_rr_list_free(addr);
ldns_rr_list_free(zone_cuts);
return new_list;
}