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Optimise dnssec-verify

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dns_dnssec_keyfromrdata() only needs to be called once per DNSKEY
rather than once per verification attempt.
This commit is contained in:
Mark Andrews
2020-11-25 17:52:22 +11:00
parent d7f41c3dce
commit c75b325832
1 changed files with 41 additions and 32 deletions
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73
lib/dns/zoneverify.c
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@@ -161,37 +161,22 @@ has_dname(const vctx_t *vctx, dns_dbnode_t *node) {
static bool
goodsig(const vctx_t *vctx, dns_rdata_t *sigrdata, const dns_name_t *name,
dns_rdataset_t *keyrdataset, dns_rdataset_t *rdataset) {
dns_rdata_dnskey_t key;
dst_key_t **dstkeys, size_t nkeys, dns_rdataset_t *rdataset) {
dns_rdata_rrsig_t sig;
dst_key_t *dstkey = NULL;
isc_result_t result;
result = dns_rdata_tostruct(sigrdata, &sig, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
for (result = dns_rdataset_first(keyrdataset); result == ISC_R_SUCCESS;
result = dns_rdataset_next(keyrdataset))
{
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdataset_current(keyrdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &key, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
result = dns_dnssec_keyfromrdata(vctx->origin, &rdata,
vctx->mctx, &dstkey);
if (result != ISC_R_SUCCESS) {
return (false);
}
if (sig.algorithm != key.algorithm ||
sig.keyid != dst_key_id(dstkey) ||
for (size_t key = 0; key < nkeys; key++) {
if (sig.algorithm != dst_key_alg(dstkeys[key]) ||
sig.keyid != dst_key_id(dstkeys[key]) ||
!dns_name_equal(&sig.signer, vctx->origin))
{
dst_key_free(&dstkey);
continue;
}
result = dns_dnssec_verify(name, rdataset, dstkey, false, 0,
vctx->mctx, sigrdata, NULL);
dst_key_free(&dstkey);
result = dns_dnssec_verify(name, rdataset, dstkeys[key], false,
0, vctx->mctx, sigrdata, NULL);
if (result == ISC_R_SUCCESS || result == DNS_R_FROMWILDCARD) {
return (true);
}
@@ -816,7 +801,7 @@ verifynsec3s(const vctx_t *vctx, const dns_name_t *name,
static isc_result_t
verifyset(vctx_t *vctx, dns_rdataset_t *rdataset, const dns_name_t *name,
dns_dbnode_t *node, dns_rdataset_t *keyrdataset) {
dns_dbnode_t *node, dst_key_t **dstkeys, size_t nkeys) {
unsigned char set_algorithms[256];
char namebuf[DNS_NAME_FORMATSIZE];
char algbuf[DNS_SECALG_FORMATSIZE];
@@ -883,7 +868,7 @@ verifyset(vctx_t *vctx, dns_rdataset_t *rdataset, const dns_name_t *name,
{
continue;
}
if (goodsig(vctx, &rdata, name, keyrdataset, rdataset)) {
if (goodsig(vctx, &rdata, name, dstkeys, nkeys, rdataset)) {
dns_rdataset_settrust(rdataset, dns_trust_secure);
dns_rdataset_settrust(&sigrdataset, dns_trust_secure);
set_algorithms[sig.algorithm] = 1;
@@ -919,7 +904,7 @@ done:
static isc_result_t
verifynode(vctx_t *vctx, const dns_name_t *name, dns_dbnode_t *node,
bool delegation, dns_rdataset_t *keyrdataset,
bool delegation, dst_key_t **dstkeys, size_t nkeys,
dns_rdataset_t *nsecset, dns_rdataset_t *nsec3paramset,
const dns_name_t *nextname, isc_result_t *vresult) {
unsigned char types[8192];
@@ -953,8 +938,8 @@ verifynode(vctx_t *vctx, const dns_name_t *name, dns_dbnode_t *node,
(!delegation || rdataset.type == dns_rdatatype_ds ||
rdataset.type == dns_rdatatype_nsec))
{
result = verifyset(vctx, &rdataset, name, node,
keyrdataset);
result = verifyset(vctx, &rdataset, name, node, dstkeys,
nkeys);
if (result != ISC_R_SUCCESS) {
dns_rdataset_disassociate(&rdataset);
dns_rdatasetiter_destroy(&rdsiter);
@@ -1724,6 +1709,8 @@ verify_nodes(vctx_t *vctx, isc_result_t *vresult) {
dns_name_t *name, *nextname, *prevname, *zonecut;
dns_dbnode_t *node = NULL, *nextnode;
dns_dbiterator_t *dbiter = NULL;
dst_key_t **dstkeys;
size_t count, nkeys = 0;
bool done = false;
isc_result_t tvresult = ISC_R_UNSET;
isc_result_t result;
@@ -1735,11 +1722,27 @@ verify_nodes(vctx_t *vctx, isc_result_t *vresult) {
dns_fixedname_init(&fzonecut);
zonecut = NULL;
count = dns_rdataset_count(&vctx->keyset);
dstkeys = isc_mem_get(vctx->mctx, sizeof(*dstkeys) * count);
for (result = dns_rdataset_first(&vctx->keyset);
result == ISC_R_SUCCESS; result = dns_rdataset_next(&vctx->keyset))
{
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdataset_current(&vctx->keyset, &rdata);
dstkeys[nkeys] = NULL;
result = dns_dnssec_keyfromrdata(vctx->origin, &rdata,
vctx->mctx, &dstkeys[nkeys]);
if (result == ISC_R_SUCCESS) {
nkeys++;
}
}
result = dns_db_createiterator(vctx->db, DNS_DB_NONSEC3, &dbiter);
if (result != ISC_R_SUCCESS) {
zoneverify_log_error(vctx, "dns_db_createiterator(): %s",
isc_result_totext(result));
return (result);
goto done;
}
result = dns_dbiterator_first(dbiter);
@@ -1839,9 +1842,9 @@ verify_nodes(vctx_t *vctx, isc_result_t *vresult) {
dns_db_detachnode(vctx->db, &node);
goto done;
}
result = verifynode(vctx, name, node, isdelegation,
&vctx->keyset, &vctx->nsecset,
&vctx->nsec3paramset, nextname, &tvresult);
result = verifynode(vctx, name, node, isdelegation, dstkeys,
nkeys, &vctx->nsecset, &vctx->nsec3paramset,
nextname, &tvresult);
if (result != ISC_R_SUCCESS) {
dns_db_detachnode(vctx->db, &node);
goto done;
@@ -1889,7 +1892,7 @@ verify_nodes(vctx_t *vctx, isc_result_t *vresult) {
isc_result_totext(result));
goto done;
}
result = verifynode(vctx, name, node, false, &vctx->keyset,
result = verifynode(vctx, name, node, false, dstkeys, nkeys,
NULL, NULL, NULL, NULL);
if (result != ISC_R_SUCCESS) {
zoneverify_log_error(vctx, "verifynode: %s",
@@ -1907,7 +1910,13 @@ verify_nodes(vctx_t *vctx, isc_result_t *vresult) {
result = ISC_R_SUCCESS;
done:
dns_dbiterator_destroy(&dbiter);
while (nkeys-- > 0U) {
dst_key_free(&dstkeys[nkeys]);
}
isc_mem_put(vctx->mctx, dstkeys, sizeof(*dstkeys) * count);
if (dbiter != NULL) {
dns_dbiterator_destroy(&dbiter);
}
return (result);
}