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Minor refactoring on function match_nsec3

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The logic for matching a set of nsec3 objects against an nsec3param
object was moved to a specific function.

For more details check thread:
https://gitlab.isc.org/isc-projects/bind9/-/merge_requests/291#note_12176
This commit is contained in:
Diego Fronza
2020-06-18 16:49:40 -03:00
committed by Evan Hunt
parent 966c06a9e6
commit 98d1e40143
1 changed files with 35 additions and 20 deletions
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55
lib/dns/zoneverify.c
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@@ -424,6 +424,40 @@ record_nsec3(const vctx_t *vctx, const unsigned char *rawhash,
return (result);
}
/*
* Check whether any NSEC3 within 'rdataset' matches the parameters in
* 'nsec3param'.
*/
static isc_result_t
find_nsec3_match(const dns_rdata_nsec3param_t *nsec3param,
dns_rdataset_t *rdataset, size_t rhsize,
dns_rdata_nsec3_t *nsec3_match) {
isc_result_t result;
/*
* Find matching NSEC3 record.
*/
for (result = dns_rdataset_first(rdataset); result == ISC_R_SUCCESS;
result = dns_rdataset_next(rdataset))
{
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdataset_current(rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, nsec3_match, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
if (nsec3_match->hash == nsec3param->hash &&
nsec3_match->next_length == rhsize &&
nsec3_match->iterations == nsec3param->iterations &&
nsec3_match->salt_length == nsec3param->salt_length &&
memcmp(nsec3_match->salt, nsec3param->salt,
nsec3param->salt_length) == 0)
{
return (ISC_R_SUCCESS);
}
}
return (result);
}
static isc_result_t
match_nsec3(const vctx_t *vctx, const dns_name_t *name,
const dns_rdata_nsec3param_t *nsec3param, dns_rdataset_t *rdataset,
@@ -436,26 +470,7 @@ match_nsec3(const vctx_t *vctx, const dns_name_t *name,
isc_result_t result;
unsigned int len;
/*
* Find matching NSEC3 record.
*/
for (result = dns_rdataset_first(rdataset); result == ISC_R_SUCCESS;
result = dns_rdataset_next(rdataset))
{
dns_rdata_t rdata = DNS_RDATA_INIT;
dns_rdataset_current(rdataset, &rdata);
result = dns_rdata_tostruct(&rdata, &nsec3, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
if (nsec3.hash == nsec3param->hash &&
nsec3.next_length == rhsize &&
nsec3.iterations == nsec3param->iterations &&
nsec3.salt_length == nsec3param->salt_length &&
memcmp(nsec3.salt, nsec3param->salt,
nsec3param->salt_length) == 0)
{
break;
}
}
result = find_nsec3_match(nsec3param, rdataset, rhsize, &nsec3);
if (result != ISC_R_SUCCESS) {
dns_name_format(name, namebuf, sizeof(namebuf));
zoneverify_log_error(vctx, "Missing NSEC3 record for %s",