/** setup qinfo and edns */
static int
setup_qinfo_edns(struct libworker* w, struct ctx_query* q,
struct query_info* qinfo, struct edns_data* edns)
{
ldns_rdf* rdf;
qinfo->qtype = (uint16_t)q->res->qtype;
qinfo->qclass = (uint16_t)q->res->qclass;
rdf = ldns_dname_new_frm_str(q->res->qname);
if(!rdf) {
return 0;
}
#ifdef UNBOUND_ALLOC_LITE
qinfo->qname = memdup(ldns_rdf_data(rdf), ldns_rdf_size(rdf));
qinfo->qname_len = ldns_rdf_size(rdf);
ldns_rdf_deep_free(rdf);
rdf = 0;
#else
qinfo->qname = ldns_rdf_data(rdf);
qinfo->qname_len = ldns_rdf_size(rdf);
#endif
edns->edns_present = 1;
edns->ext_rcode = 0;
edns->edns_version = 0;
edns->bits = EDNS_DO;
if(ldns_buffer_capacity(w->back->udp_buff) < 65535)
edns->udp_size = (uint16_t)ldns_buffer_capacity(
w->back->udp_buff);
else edns->udp_size = 65535;
ldns_rdf_free(rdf);
return 1;
}
/**
* Add new RR. It converts ldns RR to wire format.
* @param anchors: anchor storage.
* @param buffer: parsing buffer.
* @param rr: the rr (allocated by caller).
* @return NULL on error, else the trust anchor.
*/
static struct trust_anchor*
anchor_store_new_rr(struct val_anchors* anchors, ldns_buffer* buffer,
ldns_rr* rr)
{
struct trust_anchor* ta;
ldns_rdf* owner = ldns_rr_owner(rr);
ldns_status status;
ldns_buffer_clear(buffer);
ldns_buffer_skip(buffer, 2); /* skip rdatalen */
status = ldns_rr_rdata2buffer_wire(buffer, rr);
if(status != LDNS_STATUS_OK) {
log_err("error converting trustanchor to wireformat: %s",
ldns_get_errorstr_by_id(status));
return NULL;
}
ldns_buffer_flip(buffer);
ldns_buffer_write_u16_at(buffer, 0, ldns_buffer_limit(buffer) - 2);
if(!(ta=anchor_store_new_key(anchors, ldns_rdf_data(owner),
ldns_rr_get_type(rr), ldns_rr_get_class(rr),
ldns_buffer_begin(buffer), ldns_buffer_limit(buffer)))) {
return NULL;
}
log_nametypeclass(VERB_QUERY, "adding trusted key",
ldns_rdf_data(owner),
ldns_rr_get_type(rr), ldns_rr_get_class(rr));
return ta;
}
/**
* Publish the NSEC3 parameters as indicated by the signer configuration.
*
*/
ods_status
zone_publish_nsec3param(zone_type* zone)
{
rrset_type* rrset = NULL;
rr_type* n3prr = NULL;
ldns_rr* rr = NULL;
ods_status status = ODS_STATUS_OK;
if (!zone || !zone->name || !zone->db || !zone->signconf) {
return ODS_STATUS_ASSERT_ERR;
}
if (!zone->signconf->nsec3params) {
/* NSEC */
ods_log_assert(zone->signconf->nsec_type == LDNS_RR_TYPE_NSEC);
return ODS_STATUS_OK;
}
if (!zone->signconf->nsec3params->rr) {
rr = ldns_rr_new_frm_type(LDNS_RR_TYPE_NSEC3PARAMS);
if (!rr) {
ods_log_error("[%s] unable to publish nsec3params for zone %s: "
"error creating rr (%s)", zone_str, zone->name,
ods_status2str(status));
return ODS_STATUS_MALLOC_ERR;
}
ldns_rr_set_class(rr, zone->klass);
ldns_rr_set_ttl(rr, 0);
ldns_rr_set_owner(rr, ldns_rdf_clone(zone->apex));
ldns_nsec3_add_param_rdfs(rr,
zone->signconf->nsec3params->algorithm, 0,
zone->signconf->nsec3params->iterations,
zone->signconf->nsec3params->salt_len,
zone->signconf->nsec3params->salt_data);
/**
* Always set bit 7 of the flags to zero,
* according to rfc5155 section 11
*/
ldns_set_bit(ldns_rdf_data(ldns_rr_rdf(rr, 1)), 7, 0);
zone->signconf->nsec3params->rr = rr;
}
ods_log_assert(zone->signconf->nsec3params->rr);
status = zone_add_rr(zone, zone->signconf->nsec3params->rr, 0);
if (status == ODS_STATUS_UNCHANGED) {
/* rr already exists, adjust pointer */
rrset = zone_lookup_rrset(zone, zone->apex, LDNS_RR_TYPE_NSEC3PARAMS);
ods_log_assert(rrset);
n3prr = rrset_lookup_rr(rrset, zone->signconf->nsec3params->rr);
ods_log_assert(n3prr);
if (n3prr->rr != zone->signconf->nsec3params->rr) {
ldns_rr_free(zone->signconf->nsec3params->rr);
}
zone->signconf->nsec3params->rr = n3prr->rr;
status = ODS_STATUS_OK;
} else if (status != ODS_STATUS_OK) {
ods_log_error("[%s] unable to publish nsec3params for zone %s: "
"error adding nsec3params (%s)", zone_str,
zone->name, ods_status2str(status));
}
return status;
}
ldns_status
ldns_rdf2buffer_wire(ldns_buffer *buffer, const ldns_rdf *rdf)
{
if (ldns_buffer_reserve(buffer, ldns_rdf_size(rdf))) {
ldns_buffer_write(buffer, ldns_rdf_data(rdf), ldns_rdf_size(rdf));
}
return ldns_buffer_status(buffer);
}
ldns_status
ldns_dname2buffer_wire(ldns_buffer *buffer, const ldns_rdf *name)
{
if (ldns_buffer_reserve(buffer, ldns_rdf_size(name))) {
ldns_buffer_write(buffer, ldns_rdf_data(name), ldns_rdf_size(name));
}
return ldns_buffer_status(buffer);
}
/* put this here tmp. for debugging */
void
xprintf_rdf(ldns_rdf *rd)
{
/* assume printable string */
fprintf(stderr, "size\t:%u\n", (unsigned int)ldns_rdf_size(rd));
fprintf(stderr, "type\t:%u\n", (unsigned int)ldns_rdf_get_type(rd));
fprintf(stderr, "data\t:[%.*s]\n", (int)ldns_rdf_size(rd),
(char*)ldns_rdf_data(rd));
}
/** add hint to delegation hints */
static int
ah(struct delegpt* dp, const char* sv, const char* ip)
{
struct sockaddr_storage addr;
socklen_t addrlen;
ldns_rdf* rdf = ldns_dname_new_frm_str(sv);
if(!rdf) {
log_err("could not parse %s", sv);
return 0;
}
if(!delegpt_add_ns_mlc(dp, ldns_rdf_data(rdf), 0) ||
!extstrtoaddr(ip, &addr, &addrlen) ||
!delegpt_add_target_mlc(dp, ldns_rdf_data(rdf), ldns_rdf_size(rdf),
&addr, addrlen, 0, 0)) {
ldns_rdf_deep_free(rdf);
return 0;
}
ldns_rdf_deep_free(rdf);
return 1;
}
size_t
ldns_rr_dnskey_key_size(const ldns_rr *key)
{
if (!key || !ldns_rr_dnskey_key(key)
|| !ldns_rr_dnskey_algorithm(key)) {
return 0;
}
return ldns_rr_dnskey_key_size_raw((unsigned char*)ldns_rdf_data(ldns_rr_dnskey_key(key)),
ldns_rdf_size(ldns_rr_dnskey_key(key)),
ldns_rdf2native_int8(ldns_rr_dnskey_algorithm(key))
);
}
/* Returns whether the last label in the name is a root label (a empty label).
* Note that it is not enough to just test the last character to be 0,
* because it may be part of the last label itself.
*/
static bool
ldns_dname_last_label_is_root_label(const ldns_rdf* dname)
{
size_t src_pos;
size_t len = 0;
for (src_pos = 0; src_pos < ldns_rdf_size(dname); src_pos += len + 1) {
len = ldns_rdf_data(dname)[src_pos];
}
assert(src_pos == ldns_rdf_size(dname));
return src_pos > 0 && len == 0;
}
/* code from rdata.c */
static struct sockaddr_storage *
ldns_rdf2native_sockaddr_storage_port(
const ldns_rdf *rd, uint16_t port, size_t *size)
{
struct sockaddr_storage *data;
struct sockaddr_in *data_in;
struct sockaddr_in6 *data_in6;
data = LDNS_MALLOC(struct sockaddr_storage);
if (!data) {
return NULL;
}
/* zero the structure for portability */
memset(data, 0, sizeof(struct sockaddr_storage));
switch(ldns_rdf_get_type(rd)) {
case LDNS_RDF_TYPE_A:
#ifndef S_SPLINT_S
data->ss_family = AF_INET;
#endif
data_in = (struct sockaddr_in*) data;
data_in->sin_port = (in_port_t)htons(port);
memcpy(&(data_in->sin_addr), ldns_rdf_data(rd), ldns_rdf_size(rd));
*size = sizeof(struct sockaddr_in);
return data;
case LDNS_RDF_TYPE_AAAA:
#ifndef S_SPLINT_S
data->ss_family = AF_INET6;
#endif
data_in6 = (struct sockaddr_in6*) data;
data_in6->sin6_port = (in_port_t)htons(port);
memcpy(&data_in6->sin6_addr, ldns_rdf_data(rd), ldns_rdf_size(rd));
*size = sizeof(struct sockaddr_in6);
return data;
default:
LDNS_FREE(data);
return NULL;
}
}
/**
* Insert insecure anchor
* @param anchors: anchor storage.
* @param str: the domain name.
* @return NULL on error, Else last trust anchor point
*/
static struct trust_anchor*
anchor_insert_insecure(struct val_anchors* anchors, const char* str)
{
struct trust_anchor* ta;
ldns_rdf* nm = ldns_dname_new_frm_str(str);
if(!nm) {
log_err("parse error in domain name '%s'", str);
return NULL;
}
ta = anchor_store_new_key(anchors, ldns_rdf_data(nm), LDNS_RR_TYPE_DS,
LDNS_RR_CLASS_IN, NULL, 0);
ldns_rdf_deep_free(nm);
return ta;
}
/** process nsec3 params and perform hashing */
static void
process_nsec3(int argc, char* argv[])
{
char line[10240];
ldns_rdf* salt;
ldns_rdf* in, *out;
ldns_status status;
status = ldns_str2rdf_nsec3_salt(&salt, argv[5]);
if(status != LDNS_STATUS_OK)
fatal_exit("Could not parse salt %s: %s", argv[5],
ldns_get_errorstr_by_id(status));
log_assert(argc == 6);
while(fgets(line, (int)sizeof(line), stdin)) {
if(strlen(line) > 0)
line[strlen(line)-1] = 0; /* remove trailing newline */
if(line[0]==0)
continue;
status = ldns_str2rdf_dname(&in, line);
if(status != LDNS_STATUS_OK)
fatal_exit("Could not parse name %s: %s", line,
ldns_get_errorstr_by_id(status));
ldns_rdf_print(stdout, in);
printf(" -> ");
/* arg 3 is flags, unused */
out = ldns_nsec3_hash_name(in, (uint8_t)atoi(argv[2]),
(uint16_t)atoi(argv[4]),
ldns_rdf_data(salt)[0], ldns_rdf_data(salt)+1);
if(!out)
fatal_exit("Could not hash %s", line);
ldns_rdf_print(stdout, out);
printf("\n");
ldns_rdf_deep_free(in);
ldns_rdf_deep_free(out);
}
ldns_rdf_deep_free(salt);
}
ldns_status
ldns_rdf2buffer_wire_canonical(ldns_buffer *buffer, const ldns_rdf *rdf)
{
size_t i;
uint8_t *rdf_data;
if (ldns_rdf_get_type(rdf) == LDNS_RDF_TYPE_DNAME) {
if (ldns_buffer_reserve(buffer, ldns_rdf_size(rdf))) {
rdf_data = ldns_rdf_data(rdf);
for (i = 0; i < ldns_rdf_size(rdf); i++) {
ldns_buffer_write_u8(buffer,
LDNS_DNAME_NORMALIZE(rdf_data[i]));
}
}
} else {
/* direct copy for all other types */
if (ldns_buffer_reserve(buffer, ldns_rdf_size(rdf))) {
ldns_buffer_write(buffer,
ldns_rdf_data(rdf),
ldns_rdf_size(rdf));
}
}
return ldns_buffer_status(buffer);
}
getdns_return_t
getdns_convert_fqdn_to_dns_name(
const char *fqdn_as_string, struct getdns_bindata **dns_name_wire_fmt)
{
ldns_rdf *rdf;
if (ldns_str2rdf_dname(&rdf, fqdn_as_string) != LDNS_STATUS_OK)
return GETDNS_RETURN_GENERIC_ERROR;;
*dns_name_wire_fmt = malloc(sizeof(struct getdns_bindata));
if (*dns_name_wire_fmt) {
(*dns_name_wire_fmt)->size = ldns_rdf_size(rdf);
(*dns_name_wire_fmt)->data = ldns_rdf_data(rdf);
}
ldns_rdf_free(rdf);
return *dns_name_wire_fmt ? GETDNS_RETURN_GOOD
: GETDNS_RETURN_MEMORY_ERROR;
}
/** Match q edns data to p raw edns data */
static int
match_ednsdata(ldns_pkt* q, struct reply_packet* p)
{
size_t qdlen, pdlen;
uint8_t *qd, *pd;
if(!ldns_pkt_edns(q) || !ldns_pkt_edns_data(q)) {
verbose(3, "No EDNS data\n");
return 0;
}
qdlen = ldns_rdf_size(ldns_pkt_edns_data(q));
pdlen = ldns_buffer_limit(p->raw_ednsdata);
qd = ldns_rdf_data(ldns_pkt_edns_data(q));
pd = ldns_buffer_begin(p->raw_ednsdata);
if( qdlen == pdlen && 0 == memcmp(qd, pd, qdlen) ) return 1;
verbose(3, "EDNS data does not match.\n");
verbose_hex(3, qd, qdlen, "q:");
verbose_hex(3, pd, pdlen, "p:");
return 0;
}
/** make NULL entries for stubs */
static int
make_stub_holes(struct iter_forwards* fwd, struct config_file* cfg)
{
struct config_stub* s;
for(s = cfg->stubs; s; s = s->next) {
ldns_rdf* rdf = ldns_dname_new_frm_str(s->name);
if(!rdf) {
log_err("cannot parse stub name '%s'", s->name);
return 0;
}
if(!fwd_add_stub_hole(fwd, LDNS_RR_CLASS_IN,
ldns_rdf_data(rdf))) {
ldns_rdf_deep_free(rdf);
log_err("out of memory");
return 0;
}
ldns_rdf_deep_free(rdf);
}
return 1;
}
ldns_status
ldns_dane_create_tlsa_owner(ldns_rdf** tlsa_owner, const ldns_rdf* name,
uint16_t port, ldns_dane_transport transport)
{
char buf[LDNS_MAX_DOMAINLEN];
size_t s;
assert(tlsa_owner != NULL);
assert(name != NULL);
assert(ldns_rdf_get_type(name) == LDNS_RDF_TYPE_DNAME);
s = (size_t)snprintf(buf, LDNS_MAX_DOMAINLEN, "X_%d", (int)port);
buf[0] = (char)(s - 1);
switch(transport) {
case LDNS_DANE_TRANSPORT_TCP:
s += snprintf(buf + s, LDNS_MAX_DOMAINLEN - s, "\004_tcp");
break;
case LDNS_DANE_TRANSPORT_UDP:
s += snprintf(buf + s, LDNS_MAX_DOMAINLEN - s, "\004_udp");
break;
case LDNS_DANE_TRANSPORT_SCTP:
s += snprintf(buf + s, LDNS_MAX_DOMAINLEN - s, "\005_sctp");
break;
default:
return LDNS_STATUS_DANE_UNKNOWN_TRANSPORT;
}
if (s + ldns_rdf_size(name) > LDNS_MAX_DOMAINLEN) {
return LDNS_STATUS_DOMAINNAME_OVERFLOW;
}
memcpy(buf + s, ldns_rdf_data(name), ldns_rdf_size(name));
*tlsa_owner = ldns_rdf_new_frm_data(LDNS_RDF_TYPE_DNAME,
s + ldns_rdf_size(name), buf);
if (*tlsa_owner == NULL) {
return LDNS_STATUS_MEM_ERR;
}
return LDNS_STATUS_OK;
}
/** parse commandline argument domain name */
static int
parse_arg_name(SSL* ssl, char* str, uint8_t** res, size_t* len, int* labs)
{
ldns_rdf* rdf;
*res = NULL;
*len = 0;
*labs = 0;
rdf = ldns_dname_new_frm_str(str);
if(!rdf) {
ssl_printf(ssl, "error cannot parse name %s\n", str);
return 0;
}
*res = memdup(ldns_rdf_data(rdf), ldns_rdf_size(rdf));
ldns_rdf_deep_free(rdf);
if(!*res) {
ssl_printf(ssl, "error out of memory\n");
return 0;
}
*labs = dname_count_size_labels(*res, len);
return 1;
}
/** set stub host names */
static int
read_stubs_host(struct config_stub* s, struct delegpt* dp)
{
struct config_strlist* p;
ldns_rdf* rdf;
for(p = s->hosts; p; p = p->next) {
log_assert(p->str);
rdf = ldns_dname_new_frm_str(p->str);
if(!rdf) {
log_err("cannot parse stub %s nameserver name: '%s'",
s->name, p->str);
return 0;
}
if(!delegpt_add_ns_mlc(dp, ldns_rdf_data(rdf), 0)) {
ldns_rdf_deep_free(rdf);
log_err("out of memory");
return 0;
}
ldns_rdf_deep_free(rdf);
}
return 1;
}
/** set stub name */
static struct delegpt*
read_stubs_name(struct config_stub* s)
{
struct delegpt* dp;
ldns_rdf* rdf;
if(!s->name) {
log_err("stub zone without a name");
return NULL;
}
rdf = ldns_dname_new_frm_str(s->name);
if(!rdf) {
log_err("cannot parse stub zone name %s", s->name);
return NULL;
}
if(!(dp=delegpt_create_mlc(ldns_rdf_data(rdf)))) {
ldns_rdf_deep_free(rdf);
log_err("out of memory");
return NULL;
}
ldns_rdf_deep_free(rdf);
return dp;
}
/** read root hints from file */
static int
read_root_hints(struct iter_hints* hints, char* fname)
{
int lineno = 0;
uint32_t default_ttl = 0;
ldns_rdf* origin = NULL;
ldns_rdf* prev_rr = NULL;
struct delegpt* dp;
ldns_rr* rr = NULL;
ldns_status status;
uint16_t c = LDNS_RR_CLASS_IN;
FILE* f = fopen(fname, "r");
if(!f) {
log_err("could not read root hints %s: %s",
fname, strerror(errno));
return 0;
}
dp = delegpt_create_mlc(NULL);
if(!dp) {
log_err("out of memory reading root hints");
fclose(f);
return 0;
}
verbose(VERB_QUERY, "Reading root hints from %s", fname);
dp->has_parent_side_NS = 1;
while(!feof(f)) {
status = ldns_rr_new_frm_fp_l(&rr, f,
&default_ttl, &origin, &prev_rr, &lineno);
if(status == LDNS_STATUS_SYNTAX_EMPTY ||
status == LDNS_STATUS_SYNTAX_TTL ||
status == LDNS_STATUS_SYNTAX_ORIGIN)
continue;
if(status != LDNS_STATUS_OK) {
log_err("reading root hints %s %d: %s", fname,
lineno, ldns_get_errorstr_by_id(status));
goto stop_read;
}
if(ldns_rr_get_type(rr) == LDNS_RR_TYPE_NS) {
if(!delegpt_add_ns_mlc(dp,
ldns_rdf_data(ldns_rr_rdf(rr, 0)), 0)) {
log_err("out of memory reading root hints");
goto stop_read;
}
c = ldns_rr_get_class(rr);
if(!dp->name) {
if(!delegpt_set_name_mlc(dp,
ldns_rdf_data(ldns_rr_owner(rr)))){
log_err("out of memory.");
goto stop_read;
}
}
} else if(ldns_rr_get_type(rr) == LDNS_RR_TYPE_A) {
struct sockaddr_in sa;
socklen_t len = (socklen_t)sizeof(sa);
memset(&sa, 0, len);
sa.sin_family = AF_INET;
sa.sin_port = (in_port_t)htons(UNBOUND_DNS_PORT);
memmove(&sa.sin_addr,
ldns_rdf_data(ldns_rr_rdf(rr, 0)), INET_SIZE);
if(!delegpt_add_target_mlc(dp,
ldns_rdf_data(ldns_rr_owner(rr)),
ldns_rdf_size(ldns_rr_owner(rr)),
(struct sockaddr_storage*)&sa, len,
0, 0)) {
log_err("out of memory reading root hints");
goto stop_read;
}
} else if(ldns_rr_get_type(rr) == LDNS_RR_TYPE_AAAA) {
struct sockaddr_in6 sa;
socklen_t len = (socklen_t)sizeof(sa);
memset(&sa, 0, len);
sa.sin6_family = AF_INET6;
sa.sin6_port = (in_port_t)htons(UNBOUND_DNS_PORT);
memmove(&sa.sin6_addr,
ldns_rdf_data(ldns_rr_rdf(rr, 0)), INET6_SIZE);
if(!delegpt_add_target_mlc(dp,
ldns_rdf_data(ldns_rr_owner(rr)),
ldns_rdf_size(ldns_rr_owner(rr)),
(struct sockaddr_storage*)&sa, len,
0, 0)) {
log_err("out of memory reading root hints");
goto stop_read;
}
} else {
log_warn("root hints %s:%d skipping type %d",
fname, lineno, ldns_rr_get_type(rr));
}
ldns_rr_free(rr);
}
if (origin)
ldns_rdf_deep_free(origin);
if (prev_rr)
ldns_rdf_deep_free(prev_rr);
fclose(f);
if(!dp->name) {
log_warn("root hints %s: no NS content", fname);
delegpt_free_mlc(dp);
return 1;
}
if(!hints_insert(hints, c, dp, 0)) {
return 0;
}
delegpt_log(VERB_QUERY, dp);
return 1;
stop_read:
if (origin)
ldns_rdf_deep_free(origin);
if (prev_rr)
ldns_rdf_deep_free(prev_rr);
delegpt_free_mlc(dp);
fclose(f);
return 0;
}
ldns_status
ldns_dnssec_zone_sign_nsec3(ldns_dnssec_zone *zone,
ldns_rr_list *new_rrs,
ldns_key_list *key_list,
int (*func)(ldns_rr *, void *),
void *arg,
uint8_t algorithm,
uint8_t flags,
uint16_t iterations,
uint8_t salt_length,
uint8_t *salt)
{
ldns_rr *nsec3, *nsec3params;
ldns_status result = LDNS_STATUS_OK;
/* zone is already sorted */
ldns_dnssec_zone_mark_glue(zone);
/* TODO if there are already nsec3s presents and their
* parameters are the same as these, we don't have to recreate
*/
if (zone->names) {
/* add empty nonterminals */
ldns_dnssec_zone_add_empty_nonterminals(zone);
nsec3 = ((ldns_dnssec_name *)zone->names->root->data)->nsec;
if (nsec3 && ldns_rr_get_type(nsec3) == LDNS_RR_TYPE_NSEC3) {
/* no need to recreate */
} else {
if (!ldns_dnssec_zone_find_rrset(zone,
zone->soa->name,
LDNS_RR_TYPE_NSEC3PARAMS)) {
/* create and add the nsec3params rr */
nsec3params =
ldns_rr_new_frm_type(LDNS_RR_TYPE_NSEC3PARAMS);
ldns_rr_set_owner(nsec3params,
ldns_rdf_clone(zone->soa->name));
ldns_nsec3_add_param_rdfs(nsec3params,
algorithm,
flags,
iterations,
salt_length,
salt);
/* always set bit 7 of the flags to zero, according to
* rfc5155 section 11 */
ldns_set_bit(ldns_rdf_data(ldns_rr_rdf(nsec3params, 1)), 7, 0);
ldns_dnssec_zone_add_rr(zone, nsec3params);
ldns_rr_list_push_rr(new_rrs, nsec3params);
}
result = ldns_dnssec_zone_create_nsec3s(zone,
new_rrs,
algorithm,
flags,
iterations,
salt_length,
salt);
if (result != LDNS_STATUS_OK) {
return result;
}
}
result = ldns_dnssec_zone_create_rrsigs(zone,
new_rrs,
key_list,
func,
arg);
}
return result;
}
int
getrrsetbyname(const char *hostname, unsigned int rdclass,
unsigned int rdtype, unsigned int flags,
struct rrsetinfo **res)
{
int result;
unsigned int i, j, index_ans, index_sig;
struct rrsetinfo *rrset = NULL;
struct rdatainfo *rdata;
size_t len;
ldns_resolver *ldns_res;
ldns_rdf *domain = NULL;
ldns_pkt *pkt = NULL;
ldns_rr_list *rrsigs = NULL, *rrdata = NULL;
ldns_status err;
ldns_rr *rr;
/* check for invalid class and type */
if (rdclass > 0xffff || rdtype > 0xffff) {
result = ERRSET_INVAL;
goto fail;
}
/* don't allow queries of class or type ANY */
if (rdclass == 0xff || rdtype == 0xff) {
result = ERRSET_INVAL;
goto fail;
}
/* don't allow flags yet, unimplemented */
if (flags) {
result = ERRSET_INVAL;
goto fail;
}
/* Initialize resolver from resolv.conf */
domain = ldns_dname_new_frm_str(hostname);
if ((err = ldns_resolver_new_frm_file(&ldns_res, NULL)) != \
LDNS_STATUS_OK) {
result = ERRSET_FAIL;
goto fail;
}
#ifdef LDNS_DEBUG
ldns_resolver_set_debug(ldns_res, true);
#endif /* LDNS_DEBUG */
ldns_resolver_set_dnssec(ldns_res, true); /* Use DNSSEC */
/* make query */
pkt = ldns_resolver_query(ldns_res, domain, rdtype, rdclass, LDNS_RD);
/*** TODO: finer errcodes -- see original **/
if (!pkt || ldns_pkt_ancount(pkt) < 1) {
result = ERRSET_FAIL;
goto fail;
}
/* initialize rrset */
rrset = calloc(1, sizeof(struct rrsetinfo));
if (rrset == NULL) {
result = ERRSET_NOMEMORY;
goto fail;
}
rrdata = ldns_pkt_rr_list_by_type(pkt, rdtype, LDNS_SECTION_ANSWER);
rrset->rri_nrdatas = ldns_rr_list_rr_count(rrdata);
if (!rrset->rri_nrdatas) {
result = ERRSET_NODATA;
goto fail;
}
/* copy name from answer section */
len = ldns_rdf_size(ldns_rr_owner(ldns_rr_list_rr(rrdata, 0)));
if ((rrset->rri_name = malloc(len)) == NULL) {
result = ERRSET_NOMEMORY;
goto fail;
}
memcpy(rrset->rri_name,
ldns_rdf_data(ldns_rr_owner(ldns_rr_list_rr(rrdata, 0))), len);
rrset->rri_rdclass = ldns_rr_get_class(ldns_rr_list_rr(rrdata, 0));
rrset->rri_rdtype = ldns_rr_get_type(ldns_rr_list_rr(rrdata, 0));
rrset->rri_ttl = ldns_rr_ttl(ldns_rr_list_rr(rrdata, 0));
debug2("ldns: got %u answers from DNS", rrset->rri_nrdatas);
/* Check for authenticated data */
if (ldns_pkt_ad(pkt)) {
rrset->rri_flags |= RRSET_VALIDATED;
} else { /* AD is not set, try autonomous validation */
ldns_rr_list * trusted_keys = ldns_rr_list_new();
debug2("ldns: trying to validate RRset");
/* Get eventual sigs */
rrsigs = ldns_pkt_rr_list_by_type(pkt, LDNS_RR_TYPE_RRSIG,
LDNS_SECTION_ANSWER);
rrset->rri_nsigs = ldns_rr_list_rr_count(rrsigs);
debug2("ldns: got %u signature(s) (RRTYPE %u) from DNS",
rrset->rri_nsigs, LDNS_RR_TYPE_RRSIG);
if ((err = ldns_verify_trusted(ldns_res, rrdata, rrsigs,
trusted_keys)) == LDNS_STATUS_OK) {
rrset->rri_flags |= RRSET_VALIDATED;
debug2("ldns: RRset is signed with a valid key");
} else {
debug2("ldns: RRset validation failed: %s",
ldns_get_errorstr_by_id(err));
}
ldns_rr_list_deep_free(trusted_keys);
}
/* allocate memory for answers */
rrset->rri_rdatas = calloc(rrset->rri_nrdatas,
sizeof(struct rdatainfo));
if (rrset->rri_rdatas == NULL) {
result = ERRSET_NOMEMORY;
goto fail;
}
/* allocate memory for signatures */
if (rrset->rri_nsigs > 0) {
rrset->rri_sigs = calloc(rrset->rri_nsigs,
sizeof(struct rdatainfo));
if (rrset->rri_sigs == NULL) {
result = ERRSET_NOMEMORY;
goto fail;
}
}
/* copy answers & signatures */
for (i=0, index_ans=0, index_sig=0; i< pkt->_header->_ancount; i++) {
rdata = NULL;
rr = ldns_rr_list_rr(ldns_pkt_answer(pkt), i);
if (ldns_rr_get_class(rr) == rrset->rri_rdclass &&
ldns_rr_get_type(rr) == rrset->rri_rdtype) {
rdata = &rrset->rri_rdatas[index_ans++];
}
if (rr->_rr_class == rrset->rri_rdclass &&
rr->_rr_type == LDNS_RR_TYPE_RRSIG &&
rrset->rri_sigs) {
rdata = &rrset->rri_sigs[index_sig++];
}
if (rdata) {
size_t rdata_offset = 0;
rdata->rdi_length = 0;
for (j=0; j< rr->_rd_count; j++) {
rdata->rdi_length +=
ldns_rdf_size(ldns_rr_rdf(rr, j));
}
rdata->rdi_data = malloc(rdata->rdi_length);
if (rdata->rdi_data == NULL) {
result = ERRSET_NOMEMORY;
goto fail;
}
/* Re-create the raw DNS RDATA */
for (j=0; j< rr->_rd_count; j++) {
len = ldns_rdf_size(ldns_rr_rdf(rr, j));
memcpy(rdata->rdi_data + rdata_offset,
ldns_rdf_data(ldns_rr_rdf(rr, j)), len);
rdata_offset += len;
}
}
}
*res = rrset;
result = ERRSET_SUCCESS;
fail:
/* freerrset(rrset); */
ldns_rdf_deep_free(domain);
ldns_pkt_free(pkt);
ldns_rr_list_deep_free(rrsigs);
ldns_rr_list_deep_free(rrdata);
ldns_resolver_deep_free(ldns_res);
return result;
}
int
main(int argc, char *argv[])
{
FILE *keyfp;
char *keyname;
ldns_rr *k;
uint16_t flags;
char *program = argv[0];
int nofile = 0;
ldns_rdf *origin = NULL;
ldns_status result;
argv++, argc--;
while (argc && argv[0][0] == '-') {
if (strcmp(argv[0], "-n") == 0) {
nofile=1;
}
else {
usage(stderr, program);
exit(EXIT_FAILURE);
}
argv++, argc--;
}
if (argc != 1) {
usage(stderr, program);
exit(EXIT_FAILURE);
}
keyname = strdup(argv[0]);
keyfp = fopen(keyname, "r");
if (!keyfp) {
fprintf(stderr, "Failed to open public key file %s: %s\n", keyname,
strerror(errno));
exit(EXIT_FAILURE);
}
result = ldns_rr_new_frm_fp(&k, keyfp, 0, &origin, NULL);
/* what does this while loop do? */
while (result == LDNS_STATUS_SYNTAX_ORIGIN) {
result = ldns_rr_new_frm_fp(&k, keyfp, 0, &origin, NULL);
}
if (result != LDNS_STATUS_OK) {
fprintf(stderr, "Could not read public key from file %s: %s\n", keyname, ldns_get_errorstr_by_id(result));
exit(EXIT_FAILURE);
}
fclose(keyfp);
flags = ldns_read_uint16(ldns_rdf_data(ldns_rr_dnskey_flags(k)));
flags |= LDNS_KEY_REVOKE_KEY;
if (!ldns_rr_dnskey_set_flags(k,
ldns_native2rdf_int16(LDNS_RDF_TYPE_INT16, flags)))
{
fprintf(stderr, "Revocation failed\n");
exit(EXIT_FAILURE);
}
/* print the public key RR to .key */
if (nofile)
ldns_rr_print(stdout,k);
else {
keyfp = fopen(keyname, "w");
if (!keyfp) {
fprintf(stderr, "Unable to open %s: %s\n", keyname,
strerror(errno));
exit(EXIT_FAILURE);
} else {
ldns_rr_print(keyfp, k);
fclose(keyfp);
fprintf(stdout, "DNSKEY revoked\n");
}
}
free(keyname);
ldns_rr_free(k);
exit(EXIT_SUCCESS);
}
