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dnssec_sign.c
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#include <ldns/config.h>
#include <ldns/ldns.h>
#include <ldns/dnssec.h>
#include <ldns/dnssec_sign.h>
#include <strings.h>
#include <time.h>
#ifdef HAVE_SSL
/* this entire file is rather useless when you don't have
* crypto...
*/
#include <openssl/ssl.h>
#include <openssl/evp.h>
#include <openssl/rand.h>
#include <openssl/err.h>
#include <openssl/md5.h>
#include <openssl/bn.h>
#include <openssl/rsa.h>
#ifdef USE_DSA
#include <openssl/dsa.h>
#endif
#endif /* HAVE_SSL */
#define LDNS_SIGN_WITH_ZONEMD ( LDNS_SIGN_WITH_ZONEMD_SIMPLE_SHA384 \
| LDNS_SIGN_WITH_ZONEMD_SIMPLE_SHA512 )
ldns_rr *
ldns_create_empty_rrsig(const ldns_rr_list *rrset,
const ldns_key *current_key)
{
uint32_t orig_ttl;
ldns_rr_class orig_class;
time_t now;
ldns_rr *current_sig;
uint8_t label_count;
ldns_rdf *signame;
label_count = ldns_dname_label_count(ldns_rr_owner(ldns_rr_list_rr(rrset,
0)));
/* RFC4035 2.2: not counting the leftmost label if it is a wildcard */
if(ldns_dname_is_wildcard(ldns_rr_owner(ldns_rr_list_rr(rrset, 0))))
label_count --;
current_sig = ldns_rr_new_frm_type(LDNS_RR_TYPE_RRSIG);
/* set the type on the new signature */
orig_ttl = ldns_rr_ttl(ldns_rr_list_rr(rrset, 0));
orig_class = ldns_rr_get_class(ldns_rr_list_rr(rrset, 0));
ldns_rr_set_ttl(current_sig, orig_ttl);
ldns_rr_set_class(current_sig, orig_class);
ldns_rr_set_owner(current_sig,
ldns_rdf_clone(
ldns_rr_owner(
ldns_rr_list_rr(rrset,
0))));
/* fill in what we know of the signature */
/* set the orig_ttl */
(void)ldns_rr_rrsig_set_origttl(
current_sig,
ldns_native2rdf_int32(LDNS_RDF_TYPE_INT32,
orig_ttl));
/* the signers name */
signame = ldns_rdf_clone(ldns_key_pubkey_owner(current_key));
ldns_dname2canonical(signame);
(void)ldns_rr_rrsig_set_signame(
current_sig,
signame);
/* label count - get it from the first rr in the rr_list */
(void)ldns_rr_rrsig_set_labels(
current_sig,
ldns_native2rdf_int8(LDNS_RDF_TYPE_INT8,
label_count));
/* inception, expiration */
now = time(NULL);
if (ldns_key_inception(current_key) != 0) {
(void)ldns_rr_rrsig_set_inception(
current_sig,
ldns_native2rdf_int32(
LDNS_RDF_TYPE_TIME,
ldns_key_inception(current_key)));
} else {
(void)ldns_rr_rrsig_set_inception(
current_sig,
ldns_native2rdf_int32(LDNS_RDF_TYPE_TIME, now));
}
if (ldns_key_expiration(current_key) != 0) {
(void)ldns_rr_rrsig_set_expiration(
current_sig,
ldns_native2rdf_int32(
LDNS_RDF_TYPE_TIME,
ldns_key_expiration(current_key)));
} else {
(void)ldns_rr_rrsig_set_expiration(
current_sig,
ldns_native2rdf_int32(
LDNS_RDF_TYPE_TIME,
now + LDNS_DEFAULT_EXP_TIME));
}
(void)ldns_rr_rrsig_set_keytag(
current_sig,
ldns_native2rdf_int16(LDNS_RDF_TYPE_INT16,
ldns_key_keytag(current_key)));
(void)ldns_rr_rrsig_set_algorithm(
current_sig,
ldns_native2rdf_int8(
LDNS_RDF_TYPE_ALG,
ldns_key_algorithm(current_key)));
(void)ldns_rr_rrsig_set_typecovered(
current_sig,
ldns_native2rdf_int16(
LDNS_RDF_TYPE_TYPE,
ldns_rr_get_type(ldns_rr_list_rr(rrset,
0))));
return current_sig;
}
#ifdef HAVE_SSL
ldns_rdf *
ldns_sign_public_buffer(ldns_buffer *sign_buf, ldns_key *current_key)
{
ldns_rdf *b64rdf = NULL;
switch(ldns_key_algorithm(current_key)) {
#ifdef USE_DSA
case LDNS_SIGN_DSA:
case LDNS_SIGN_DSA_NSEC3:
b64rdf = ldns_sign_public_evp(
sign_buf,
ldns_key_evp_key(current_key),
# ifdef HAVE_EVP_DSS1
EVP_dss1()
# else
EVP_sha1()
# endif
);
break;
#endif /* USE_DSA */
case LDNS_SIGN_RSASHA1:
case LDNS_SIGN_RSASHA1_NSEC3:
b64rdf = ldns_sign_public_evp(
sign_buf,
ldns_key_evp_key(current_key),
EVP_sha1());
break;
#ifdef USE_SHA2
case LDNS_SIGN_RSASHA256:
b64rdf = ldns_sign_public_evp(
sign_buf,
ldns_key_evp_key(current_key),
EVP_sha256());
break;
case LDNS_SIGN_RSASHA512:
b64rdf = ldns_sign_public_evp(
sign_buf,
ldns_key_evp_key(current_key),
EVP_sha512());
break;
#endif /* USE_SHA2 */
#ifdef USE_GOST
case LDNS_SIGN_ECC_GOST:
b64rdf = ldns_sign_public_evp(
sign_buf,
ldns_key_evp_key(current_key),
EVP_get_digestbyname("md_gost94"));
break;
#endif /* USE_GOST */
#ifdef USE_ECDSA
case LDNS_SIGN_ECDSAP256SHA256:
b64rdf = ldns_sign_public_evp(
sign_buf,
ldns_key_evp_key(current_key),
EVP_sha256());
break;
case LDNS_SIGN_ECDSAP384SHA384:
b64rdf = ldns_sign_public_evp(
sign_buf,
ldns_key_evp_key(current_key),
EVP_sha384());
break;
#endif
#ifdef USE_ED25519
case LDNS_SIGN_ED25519:
b64rdf = ldns_sign_public_evp(
sign_buf,
ldns_key_evp_key(current_key),
NULL);
break;
#endif
#ifdef USE_ED448
case LDNS_SIGN_ED448:
b64rdf = ldns_sign_public_evp(
sign_buf,
ldns_key_evp_key(current_key),
NULL);
break;
#endif
case LDNS_SIGN_RSAMD5:
b64rdf = ldns_sign_public_evp(
sign_buf,
ldns_key_evp_key(current_key),
EVP_md5());
break;
default:
/* do _you_ know this alg? */
printf("unknown algorithm, ");
printf("is the one used available on this system?\n");
break;
}
return b64rdf;
}
/**
* use this function to sign with a public/private key alg
* return the created signatures
*/
ldns_rr_list *
ldns_sign_public(ldns_rr_list *rrset, ldns_key_list *keys)
{
ldns_rr_list *signatures;
ldns_rr_list *rrset_clone;
ldns_rr *current_sig;
ldns_rdf *b64rdf;
ldns_key *current_key;
size_t key_count;
uint16_t i;
ldns_buffer *sign_buf;
ldns_rdf *new_owner;
if (!rrset || ldns_rr_list_rr_count(rrset) < 1 || !keys) {
return NULL;
}
new_owner = NULL;
/* prepare a signature and add all the know data
* prepare the rrset. Sign this together. */
rrset_clone = ldns_rr_list_clone(rrset);
if (!rrset_clone) {
return NULL;
}
/* make it canonical */
for(i = 0; i < ldns_rr_list_rr_count(rrset_clone); i++) {
ldns_rr_set_ttl(ldns_rr_list_rr(rrset_clone, i),
ldns_rr_ttl(ldns_rr_list_rr(rrset, 0)));
ldns_rr2canonical(ldns_rr_list_rr(rrset_clone, i));
}
/* sort */
ldns_rr_list_sort(rrset_clone);
signatures = ldns_rr_list_new();
for (key_count = 0;
key_count < ldns_key_list_key_count(keys);
key_count++) {
if (!ldns_key_use(ldns_key_list_key(keys, key_count))) {
continue;
}
sign_buf = ldns_buffer_new(LDNS_MAX_PACKETLEN);
if (!sign_buf) {
ldns_rr_list_free(rrset_clone);
ldns_rr_list_free(signatures);
ldns_rdf_free(new_owner);
return NULL;
}
b64rdf = NULL;
current_key = ldns_key_list_key(keys, key_count);
/* sign all RRs with keys that have ZSKbit, !SEPbit.
sign DNSKEY RRs with keys that have ZSKbit&SEPbit */
if (ldns_key_flags(current_key) & LDNS_KEY_ZONE_KEY) {
current_sig = ldns_create_empty_rrsig(rrset_clone,
current_key);
/* right now, we have: a key, a semi-sig and an rrset. For
* which we can create the sig and base64 encode that and
* add that to the signature */
if (ldns_rrsig2buffer_wire(sign_buf, current_sig)
!= LDNS_STATUS_OK) {
ldns_buffer_free(sign_buf);
/* ERROR */
ldns_rr_list_deep_free(rrset_clone);
ldns_rr_free(current_sig);
ldns_rr_list_deep_free(signatures);
return NULL;
}
/* add the rrset in sign_buf */
if (ldns_rr_list2buffer_wire(sign_buf, rrset_clone)
!= LDNS_STATUS_OK) {
ldns_buffer_free(sign_buf);
ldns_rr_list_deep_free(rrset_clone);
ldns_rr_free(current_sig);
ldns_rr_list_deep_free(signatures);
return NULL;
}
b64rdf = ldns_sign_public_buffer(sign_buf, current_key);
if (!b64rdf) {
/* signing went wrong */
ldns_rr_list_deep_free(rrset_clone);
ldns_rr_free(current_sig);
ldns_rr_list_deep_free(signatures);
return NULL;
}
ldns_rr_rrsig_set_sig(current_sig, b64rdf);
/* push the signature to the signatures list */
ldns_rr_list_push_rr(signatures, current_sig);
}
ldns_buffer_free(sign_buf); /* restart for the next key */
}
ldns_rr_list_deep_free(rrset_clone);
return signatures;
}
/**
* Sign data with DSA
*
* \param[in] to_sign The ldns_buffer containing raw data that is
* to be signed
* \param[in] key The DSA key structure to sign with
* \return ldns_rdf for the RRSIG ldns_rr
*/
ldns_rdf *
ldns_sign_public_dsa(ldns_buffer *to_sign, DSA *key)
{
#ifdef USE_DSA
unsigned char *sha1_hash;
ldns_rdf *sigdata_rdf;
ldns_buffer *b64sig;
DSA_SIG *sig;
const BIGNUM *R, *S;
uint8_t *data;
size_t pad;
b64sig = ldns_buffer_new(LDNS_MAX_PACKETLEN);
if (!b64sig) {
return NULL;
}
sha1_hash = SHA1((unsigned char*)ldns_buffer_begin(to_sign),
ldns_buffer_position(to_sign), NULL);
if (!sha1_hash) {
ldns_buffer_free(b64sig);
return NULL;
}
sig = DSA_do_sign(sha1_hash, SHA_DIGEST_LENGTH, key);
if(!sig) {
ldns_buffer_free(b64sig);
return NULL;
}
data = LDNS_XMALLOC(uint8_t, 1 + 2 * SHA_DIGEST_LENGTH);
if(!data) {
ldns_buffer_free(b64sig);
DSA_SIG_free(sig);
return NULL;
}
data[0] = 1;
# ifdef HAVE_DSA_SIG_GET0
DSA_SIG_get0(sig, &R, &S);
# else
R = sig->r;
S = sig->s;
# endif
pad = 20 - (size_t) BN_num_bytes(R);
if (pad > 0) {
memset(data + 1, 0, pad);
}
BN_bn2bin(R, (unsigned char *) (data + 1) + pad);
pad = 20 - (size_t) BN_num_bytes(S);
if (pad > 0) {
memset(data + 1 + SHA_DIGEST_LENGTH, 0, pad);
}
BN_bn2bin(S, (unsigned char *) (data + 1 + SHA_DIGEST_LENGTH + pad));
sigdata_rdf = ldns_rdf_new_frm_data(LDNS_RDF_TYPE_B64,
1 + 2 * SHA_DIGEST_LENGTH,
data);
ldns_buffer_free(b64sig);
LDNS_FREE(data);
DSA_SIG_free(sig);
return sigdata_rdf;
#else
(void)to_sign; (void)key;
return NULL;
#endif
}
#ifdef USE_ECDSA
#ifndef S_SPLINT_S
/** returns the number of bytes per signature-component (i.e. bits/8), or 0. */
static int
ldns_pkey_is_ecdsa(EVP_PKEY* pkey)
{
EC_KEY* ec;
const EC_GROUP* g;
#ifdef HAVE_EVP_PKEY_BASE_ID
if(EVP_PKEY_base_id(pkey) != EVP_PKEY_EC)
return 0;
#else
if(EVP_PKEY_type(pkey->type) != EVP_PKEY_EC)
return 0;
#endif
ec = EVP_PKEY_get1_EC_KEY(pkey);
g = EC_KEY_get0_group(ec);
if(!g) {
EC_KEY_free(ec);
return 0;
}
if(EC_GROUP_get_curve_name(g) == NID_X9_62_prime256v1) {
EC_KEY_free(ec);
return 32; /* 256/8 */
}
if(EC_GROUP_get_curve_name(g) == NID_secp384r1) {
EC_KEY_free(ec);
return 48; /* 384/8 */
}
/* downref the eckey, the original is still inside the pkey */
EC_KEY_free(ec);
return 0;
}
#endif /* splint */
#endif /* USE_ECDSA */
ldns_rdf *
ldns_sign_public_evp(ldns_buffer *to_sign,
EVP_PKEY *key,
const EVP_MD *digest_type)
{
unsigned int siglen;
ldns_rdf *sigdata_rdf = NULL;
ldns_buffer *b64sig;
EVP_MD_CTX *ctx;
const EVP_MD *md_type;
int r;
siglen = 0;
b64sig = ldns_buffer_new(LDNS_MAX_PACKETLEN);
if (!b64sig) {
return NULL;
}
/* initializes a signing context */
md_type = digest_type;
#ifdef USE_ED25519
if(EVP_PKEY_id(key) == NID_ED25519) {
/* digest must be NULL for ED25519 sign and verify */
md_type = NULL;
} else
#endif
#ifdef USE_ED448
if(EVP_PKEY_id(key) == NID_ED448) {
md_type = NULL;
} else
#endif
if(!md_type) {
/* unknown message digest */
ldns_buffer_free(b64sig);
return NULL;
}
#ifdef HAVE_EVP_MD_CTX_NEW
ctx = EVP_MD_CTX_new();
#else
ctx = (EVP_MD_CTX*)malloc(sizeof(*ctx));
if(ctx) EVP_MD_CTX_init(ctx);
#endif
if(!ctx) {
ldns_buffer_free(b64sig);
return NULL;
}
#if defined(USE_ED25519) || defined(USE_ED448)
if(md_type == NULL) {
/* for these methods we must use the one-shot DigestSign */
r = EVP_DigestSignInit(ctx, NULL, md_type, NULL, key);
if(r == 1) {
size_t siglen_sizet = ldns_buffer_capacity(b64sig);
r = EVP_DigestSign(ctx,
(unsigned char*)ldns_buffer_begin(b64sig),
&siglen_sizet,
(unsigned char*)ldns_buffer_begin(to_sign),
ldns_buffer_position(to_sign));
siglen = (unsigned int)siglen_sizet;
}
} else {
#else
r = 0;
if(md_type != NULL) {
#endif
r = EVP_SignInit(ctx, md_type);
if(r == 1) {
r = EVP_SignUpdate(ctx, (unsigned char*)
ldns_buffer_begin(to_sign),
ldns_buffer_position(to_sign));
}
if(r == 1) {
r = EVP_SignFinal(ctx, (unsigned char*)
ldns_buffer_begin(b64sig), &siglen, key);
}
}
if(r != 1) {
ldns_buffer_free(b64sig);
EVP_MD_CTX_destroy(ctx);
return NULL;
}
/* OpenSSL output is different, convert it */
r = 0;
#ifdef USE_DSA
#ifndef S_SPLINT_S
/* unfortunately, OpenSSL output is different from DNS DSA format */
# ifdef HAVE_EVP_PKEY_BASE_ID
if (EVP_PKEY_base_id(key) == EVP_PKEY_DSA) {
# else
if (EVP_PKEY_type(key->type) == EVP_PKEY_DSA) {
# endif
r = 1;
sigdata_rdf = ldns_convert_dsa_rrsig_asn12rdf(b64sig, siglen);
}
#endif
#endif
#if defined(USE_ECDSA)
if(
# ifdef HAVE_EVP_PKEY_BASE_ID
EVP_PKEY_base_id(key)
# else
EVP_PKEY_type(key->type)
# endif
== EVP_PKEY_EC) {
# ifdef USE_ECDSA
if(ldns_pkey_is_ecdsa(key)) {
r = 1;
sigdata_rdf = ldns_convert_ecdsa_rrsig_asn1len2rdf(
b64sig, (long)siglen, ldns_pkey_is_ecdsa(key));
}
# endif /* USE_ECDSA */
}
#endif /* PKEY_EC */
if(r == 0) {
/* ok output for other types is the same */
sigdata_rdf = ldns_rdf_new_frm_data(LDNS_RDF_TYPE_B64, siglen,
ldns_buffer_begin(b64sig));
}
ldns_buffer_free(b64sig);
EVP_MD_CTX_destroy(ctx);
return sigdata_rdf;
}
ldns_rdf *
ldns_sign_public_rsasha1(ldns_buffer *to_sign, RSA *key)
{
unsigned char *sha1_hash;
unsigned int siglen;
ldns_rdf *sigdata_rdf;
ldns_buffer *b64sig;
int result;
siglen = 0;
b64sig = ldns_buffer_new(LDNS_MAX_PACKETLEN);
if (!b64sig) {
return NULL;
}
sha1_hash = SHA1((unsigned char*)ldns_buffer_begin(to_sign),
ldns_buffer_position(to_sign), NULL);
if (!sha1_hash) {
ldns_buffer_free(b64sig);
return NULL;
}
result = RSA_sign(NID_sha1, sha1_hash, SHA_DIGEST_LENGTH,
(unsigned char*)ldns_buffer_begin(b64sig),
&siglen, key);
if (result != 1) {
ldns_buffer_free(b64sig);
return NULL;
}
sigdata_rdf = ldns_rdf_new_frm_data(LDNS_RDF_TYPE_B64, siglen,
ldns_buffer_begin(b64sig));
ldns_buffer_free(b64sig); /* can't free this buffer ?? */
return sigdata_rdf;
}
ldns_rdf *
ldns_sign_public_rsamd5(ldns_buffer *to_sign, RSA *key)
{
unsigned char *md5_hash;
unsigned int siglen;
ldns_rdf *sigdata_rdf;
ldns_buffer *b64sig;
b64sig = ldns_buffer_new(LDNS_MAX_PACKETLEN);
if (!b64sig) {
return NULL;
}
md5_hash = MD5((unsigned char*)ldns_buffer_begin(to_sign),
ldns_buffer_position(to_sign), NULL);
if (!md5_hash) {
ldns_buffer_free(b64sig);
return NULL;
}
RSA_sign(NID_md5, md5_hash, MD5_DIGEST_LENGTH,
(unsigned char*)ldns_buffer_begin(b64sig),
&siglen, key);
sigdata_rdf = ldns_rdf_new_frm_data(LDNS_RDF_TYPE_B64, siglen,
ldns_buffer_begin(b64sig));
ldns_buffer_free(b64sig);
return sigdata_rdf;
}
#endif /* HAVE_SSL */
/**
* Pushes all rrs from the rrsets of type A and AAAA on gluelist.
*/
static ldns_status
ldns_dnssec_addresses_on_glue_list(
ldns_dnssec_rrsets *cur_rrset,
ldns_rr_list *glue_list)
{
ldns_dnssec_rrs *cur_rrs;
while (cur_rrset) {
if (cur_rrset->type == LDNS_RR_TYPE_A
|| cur_rrset->type == LDNS_RR_TYPE_AAAA) {
for (cur_rrs = cur_rrset->rrs;
cur_rrs;
cur_rrs = cur_rrs->next) {
if (cur_rrs->rr) {
if (!ldns_rr_list_push_rr(glue_list,
cur_rrs->rr)) {
return LDNS_STATUS_MEM_ERR;
/* ldns_rr_list_push_rr()
* returns false when unable
* to increase the capacity
* of the ldsn_rr_list
*/
}
}
}
}
cur_rrset = cur_rrset->next;
}
return LDNS_STATUS_OK;
}
/**
* Marks the names in the zone that are occluded. Those names will be skipped
* when walking the tree with the ldns_dnssec_name_node_next_nonglue()
* function. But watch out! Names that are partially occluded (like glue with
* the same name as the delegation) will not be marked and should specifically
* be taken into account separately.
*
* When glue_list is given (not NULL), in the process of marking the names, all
* glue resource records will be pushed to that list, even glue at delegation names.
*
* \param[in] zone the zone in which to mark the names
* \param[in] glue_list the list to which to push the glue rrs
* \return LDNS_STATUS_OK on success, an error code otherwise
*/
ldns_status
ldns_dnssec_zone_mark_and_get_glue(ldns_dnssec_zone *zone,
ldns_rr_list *glue_list)
{
ldns_rbnode_t *node;
ldns_dnssec_name *name;
ldns_rdf *owner;
ldns_rdf *cut = NULL; /* keeps track of zone cuts */
/* When the cut is caused by a delegation, below_delegation will be 1.
* When caused by a DNAME, below_delegation will be 0.
*/
int below_delegation = -1; /* init suppresses comiler warning */
ldns_status s;
if (!zone || !zone->names) {
return LDNS_STATUS_NULL;
}
for (node = ldns_rbtree_first(zone->names);
node != LDNS_RBTREE_NULL;
node = ldns_rbtree_next(node)) {
name = (ldns_dnssec_name *) node->data;
owner = ldns_dnssec_name_name(name);
if (cut) {
/* The previous node was a zone cut, or a subdomain
* below a zone cut. Is this node (still) a subdomain
* below the cut? Then the name is occluded. Unless
* the name contains a SOA, after which we are
* authoritative again.
*
* FIXME! If there are labels in between the SOA and
* the cut, going from the authoritative space (below
* the SOA) up into occluded space again, will not be
* detected with the contruct below!
*/
if (ldns_dname_is_subdomain(owner, cut) &&
!ldns_dnssec_rrsets_contains_type(
name->rrsets, LDNS_RR_TYPE_SOA)) {
if (below_delegation && glue_list) {
s = ldns_dnssec_addresses_on_glue_list(
name->rrsets, glue_list);
if (s != LDNS_STATUS_OK) {
return s;
}
}
name->is_glue = true; /* Mark occluded name! */
continue;
} else {
cut = NULL;
}
}
/* The node is not below a zone cut. Is it a zone cut itself?
* Everything below a SOA is authoritative of course; Except
* when the name also contains a DNAME :).
*/
if (ldns_dnssec_rrsets_contains_type(
name->rrsets, LDNS_RR_TYPE_NS)
&& !ldns_dnssec_rrsets_contains_type(
name->rrsets, LDNS_RR_TYPE_SOA)) {
cut = owner;
below_delegation = 1;
if (glue_list) { /* record glue on the zone cut */
s = ldns_dnssec_addresses_on_glue_list(
name->rrsets, glue_list);
if (s != LDNS_STATUS_OK) {
return s;
}
}
} else if (ldns_dnssec_rrsets_contains_type(
name->rrsets, LDNS_RR_TYPE_DNAME)) {
cut = owner;
below_delegation = 0;
}
}
return LDNS_STATUS_OK;
}
/**
* Marks the names in the zone that are occluded. Those names will be skipped
* when walking the tree with the ldns_dnssec_name_node_next_nonglue()
* function. But watch out! Names that are partially occluded (like glue with
* the same name as the delegation) will not be marked and should specifically
* be taken into account separately.
*
* \param[in] zone the zone in which to mark the names
* \return LDNS_STATUS_OK on success, an error code otherwise
*/
ldns_status
ldns_dnssec_zone_mark_glue(ldns_dnssec_zone *zone)
{
return ldns_dnssec_zone_mark_and_get_glue(zone, NULL);
}
ldns_rbnode_t *
ldns_dnssec_name_node_next_nonglue(ldns_rbnode_t *node)
{
ldns_rbnode_t *next_node = NULL;
ldns_dnssec_name *next_name = NULL;
bool done = false;
if (node == LDNS_RBTREE_NULL) {
return NULL;
}
next_node = node;
while (!done) {
if (next_node == LDNS_RBTREE_NULL) {
return NULL;
} else {
next_name = (ldns_dnssec_name *)next_node->data;
if (!next_name->is_glue) {
done = true;
} else {
next_node = ldns_rbtree_next(next_node);
}
}
}
return next_node;
}
ldns_status
ldns_dnssec_zone_create_nsecs(ldns_dnssec_zone *zone,
ldns_rr_list *new_rrs)
{
ldns_rbnode_t *first_node, *cur_node, *next_node;
ldns_dnssec_name *cur_name, *next_name;
ldns_rr *nsec_rr;
uint32_t nsec_ttl;
ldns_dnssec_rrsets *soa;
/* The TTL value for any NSEC RR SHOULD be the same TTL value as the
* lesser of the MINIMUM field of the SOA record and the TTL of the SOA
* itself. This matches the definition of the TTL for negative
* responses in [RFC2308]. (draft-ietf-dnsop-nsec-ttl-01 update of
* RFC4035 Section 2.3)
*/
soa = ldns_dnssec_name_find_rrset(zone->soa, LDNS_RR_TYPE_SOA);
/* did the caller actually set it? if not,
* fall back to default ttl
*/
if (soa && soa->rrs && soa->rrs->rr) {
ldns_rr *soa_rr = soa->rrs->rr;
ldns_rdf *min_rdf = ldns_rr_rdf(soa_rr, 6);
nsec_ttl = min_rdf == NULL
|| ldns_rr_ttl(soa_rr) < ldns_rdf2native_int32(min_rdf)
? ldns_rr_ttl(soa_rr) : ldns_rdf2native_int32(min_rdf);
} else {
nsec_ttl = LDNS_DEFAULT_TTL;
}
first_node = ldns_dnssec_name_node_next_nonglue(
ldns_rbtree_first(zone->names));
cur_node = first_node;
if (cur_node) {
next_node = ldns_dnssec_name_node_next_nonglue(
ldns_rbtree_next(cur_node));
} else {
next_node = NULL;
}
while (cur_node && next_node) {
cur_name = (ldns_dnssec_name *)cur_node->data;
next_name = (ldns_dnssec_name *)next_node->data;
nsec_rr = ldns_dnssec_create_nsec(cur_name,
next_name,
LDNS_RR_TYPE_NSEC);
ldns_rr_set_ttl(nsec_rr, nsec_ttl);
if(ldns_dnssec_name_add_rr(cur_name, nsec_rr)!=LDNS_STATUS_OK){
ldns_rr_free(nsec_rr);
return LDNS_STATUS_ERR;
}
ldns_rr_list_push_rr(new_rrs, nsec_rr);
cur_node = next_node;
if (cur_node) {
next_node = ldns_dnssec_name_node_next_nonglue(
ldns_rbtree_next(cur_node));
}
}
if (cur_node && !next_node) {
cur_name = (ldns_dnssec_name *)cur_node->data;
next_name = (ldns_dnssec_name *)first_node->data;
nsec_rr = ldns_dnssec_create_nsec(cur_name,
next_name,
LDNS_RR_TYPE_NSEC);
ldns_rr_set_ttl(nsec_rr, nsec_ttl);
if(ldns_dnssec_name_add_rr(cur_name, nsec_rr)!=LDNS_STATUS_OK){
ldns_rr_free(nsec_rr);
return LDNS_STATUS_ERR;
}
ldns_rr_list_push_rr(new_rrs, nsec_rr);
} else {
printf("error\n");
}
return LDNS_STATUS_OK;
}
#ifdef HAVE_SSL
static void
ldns_hashed_names_node_free(ldns_rbnode_t *node, void *arg) {
(void) arg;
LDNS_FREE(node);
}
static ldns_status
ldns_dnssec_zone_create_nsec3s_mkmap(ldns_dnssec_zone *zone,
ldns_rr_list *new_rrs,
uint8_t algorithm,
uint8_t flags,
uint16_t iterations,
uint8_t salt_length,
uint8_t *salt,
ldns_rbtree_t **map)
{
ldns_rbnode_t *first_name_node;
ldns_rbnode_t *current_name_node;
ldns_dnssec_name *current_name;
ldns_status result = LDNS_STATUS_OK;
ldns_rr *nsec_rr;
ldns_rr_list *nsec3_list;
uint32_t nsec_ttl;
ldns_dnssec_rrsets *soa;
ldns_rbnode_t *hashmap_node;
if (!zone || !new_rrs || !zone->names) {
return LDNS_STATUS_ERR;
}
/* The TTL value for any NSEC RR SHOULD be the same TTL value as the
* lesser of the MINIMUM field of the SOA record and the TTL of the SOA
* itself. This matches the definition of the TTL for negative
* responses in [RFC2308]. (draft-ietf-dnsop-nsec-ttl-01 update of
* RFC4035 Section 2.3)
*/
soa = ldns_dnssec_name_find_rrset(zone->soa, LDNS_RR_TYPE_SOA);
/* did the caller actually set it? if not,
* fall back to default ttl
*/
if (soa && soa->rrs && soa->rrs->rr) {
ldns_rr *soa_rr = soa->rrs->rr;
ldns_rdf *min_rdf = ldns_rr_rdf(soa_rr, 6);
nsec_ttl = min_rdf == NULL
|| ldns_rr_ttl(soa_rr) < ldns_rdf2native_int32(min_rdf)
? ldns_rr_ttl(soa_rr) : ldns_rdf2native_int32(min_rdf);
} else {
nsec_ttl = LDNS_DEFAULT_TTL;
}
if (ldns_rdf_size(zone->soa->name) > 222) {
return LDNS_STATUS_NSEC3_DOMAINNAME_OVERFLOW;
}
if (zone->hashed_names) {
ldns_traverse_postorder(zone->hashed_names,
ldns_hashed_names_node_free, NULL);
LDNS_FREE(zone->hashed_names);
}
zone->hashed_names = ldns_rbtree_create(ldns_dname_compare_v);
if (zone->hashed_names && map) {
*map = zone->hashed_names;
}
first_name_node = ldns_dnssec_name_node_next_nonglue(
ldns_rbtree_first(zone->names));
current_name_node = first_name_node;
while (current_name_node && current_name_node != LDNS_RBTREE_NULL &&
result == LDNS_STATUS_OK) {
current_name = (ldns_dnssec_name *) current_name_node->data;
nsec_rr = ldns_dnssec_create_nsec3(current_name,
NULL,
zone->soa->name,
algorithm,
flags,
iterations,
salt_length,
salt);
/* by default, our nsec based generator adds rrsigs
* remove the bitmap for empty nonterminals */
if (!current_name->rrsets) {
ldns_rdf_deep_free(ldns_rr_pop_rdf(nsec_rr));
}
ldns_rr_set_ttl(nsec_rr, nsec_ttl);
result = ldns_dnssec_name_add_rr(current_name, nsec_rr);
ldns_rr_list_push_rr(new_rrs, nsec_rr);
if (ldns_rr_owner(nsec_rr)) {
hashmap_node = LDNS_MALLOC(ldns_rbnode_t);
if (hashmap_node == NULL) {
return LDNS_STATUS_MEM_ERR;
}
current_name->hashed_name =
ldns_dname_label(ldns_rr_owner(nsec_rr), 0);
if (current_name->hashed_name == NULL) {
LDNS_FREE(hashmap_node);
return LDNS_STATUS_MEM_ERR;
}
hashmap_node->key = current_name->hashed_name;
hashmap_node->data = current_name;
if (! ldns_rbtree_insert(zone->hashed_names
, hashmap_node)) {
LDNS_FREE(hashmap_node);
}
}
current_name_node = ldns_dnssec_name_node_next_nonglue(