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path: root/src/resolve/resolved-dns-dnssec.c
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Diffstat (limited to 'src/resolve/resolved-dns-dnssec.c')
-rw-r--r--src/resolve/resolved-dns-dnssec.c96
1 files changed, 71 insertions, 25 deletions
diff --git a/src/resolve/resolved-dns-dnssec.c b/src/resolve/resolved-dns-dnssec.c
index 2d06775dca..df12e86167 100644
--- a/src/resolve/resolved-dns-dnssec.c
+++ b/src/resolve/resolved-dns-dnssec.c
@@ -40,7 +40,7 @@
* - Make trust anchor store read additional DS+DNSKEY data from disk
* - wildcard zones compatibility
* - multi-label zone compatibility
- * - DMSSEC cname/dname compatibility
+ * - DNSSEC cname/dname compatibility
* - per-interface DNSSEC setting
* - DSA support
* - EC support?
@@ -193,11 +193,12 @@ static int dnssec_rsa_verify(
}
ge = gcry_pk_verify(signature_sexp, data_sexp, public_key_sexp);
- if (ge == GPG_ERR_BAD_SIGNATURE)
+ if (gpg_err_code(ge) == GPG_ERR_BAD_SIGNATURE)
r = 0;
- else if (ge != 0)
+ else if (ge != 0) {
+ log_debug("RSA signature check failed: %s", gpg_strerror(ge));
r = -EIO;
- else
+ } else
r = 1;
finish:
@@ -272,7 +273,8 @@ int dnssec_verify_rrset(
DnsResourceKey *key,
DnsResourceRecord *rrsig,
DnsResourceRecord *dnskey,
- usec_t realtime) {
+ usec_t realtime,
+ DnssecResult *result) {
uint8_t wire_format_name[DNS_WIRE_FOMAT_HOSTNAME_MAX];
size_t exponent_size, modulus_size, hash_size;
@@ -285,6 +287,7 @@ int dnssec_verify_rrset(
assert(key);
assert(rrsig);
assert(dnskey);
+ assert(result);
assert(rrsig->key->type == DNS_TYPE_RRSIG);
assert(dnskey->key->type == DNS_TYPE_DNSKEY);
@@ -301,8 +304,10 @@ int dnssec_verify_rrset(
r = dnssec_rrsig_expired(rrsig, realtime);
if (r < 0)
return r;
- if (r > 0)
- return DNSSEC_SIGNATURE_EXPIRED;
+ if (r > 0) {
+ *result = DNSSEC_SIGNATURE_EXPIRED;
+ return 0;
+ }
/* Collect all relevant RRs in a single array, so that we can look at the RRset */
list = newa(DnsResourceRecord *, a->n_rrs);
@@ -326,7 +331,7 @@ int dnssec_verify_rrset(
return -ENODATA;
/* Bring the RRs into canonical order */
- qsort_safe(list, n, sizeof(DnsResourceRecord), rr_compare);
+ qsort_safe(list, n, sizeof(DnsResourceRecord*), rr_compare);
/* OK, the RRs are now in canonical order. Let's calculate the digest */
switch (rrsig->rrsig.algorithm) {
@@ -444,7 +449,8 @@ int dnssec_verify_rrset(
if (r < 0)
goto finish;
- r = r ? DNSSEC_VERIFIED : DNSSEC_INVALID;
+ *result = r ? DNSSEC_VALIDATED : DNSSEC_INVALID;
+ r = 0;
finish:
gcry_md_close(md);
@@ -476,7 +482,7 @@ int dnssec_rrsig_match_dnskey(DnsResourceRecord *rrsig, DnsResourceRecord *dnske
if (dnssec_keytag(dnskey) != rrsig->rrsig.key_tag)
return 0;
- return dns_name_equal(DNS_RESOURCE_KEY_NAME(dnskey->key), DNS_RESOURCE_KEY_NAME(rrsig->key));
+ return dns_name_equal(DNS_RESOURCE_KEY_NAME(dnskey->key), rrsig->rrsig.signer);
}
int dnssec_key_match_rrsig(DnsResourceKey *key, DnsResourceRecord *rrsig) {
@@ -499,15 +505,17 @@ int dnssec_verify_rrset_search(
DnsAnswer *a,
DnsResourceKey *key,
DnsAnswer *validated_dnskeys,
- usec_t realtime) {
+ usec_t realtime,
+ DnssecResult *result) {
bool found_rrsig = false, found_dnskey = false;
DnsResourceRecord *rrsig;
int r;
assert(key);
+ assert(result);
- /* Verifies all RRs from "a" that match the key "key", against DNSKEY RRs in "validated_dnskeys" */
+ /* Verifies all RRs from "a" that match the key "key", against DNSKEY and DS RRs in "validated_dnskeys" */
if (!a || a->n_rrs <= 0)
return -ENODATA;
@@ -524,7 +532,9 @@ int dnssec_verify_rrset_search(
found_rrsig = true;
+ /* Look for a matching key */
DNS_ANSWER_FOREACH(dnskey, validated_dnskeys) {
+ DnssecResult one_result;
r = dnssec_rrsig_match_dnskey(rrsig, dnskey);
if (r < 0)
@@ -545,11 +555,13 @@ int dnssec_verify_rrset_search(
* the RRSet against the RRSIG and DNSKEY
* combination. */
- r = dnssec_verify_rrset(a, key, rrsig, dnskey, realtime);
+ r = dnssec_verify_rrset(a, key, rrsig, dnskey, realtime, &one_result);
if (r < 0 && r != EOPNOTSUPP)
return r;
- if (r == DNSSEC_VERIFIED)
- return DNSSEC_VERIFIED;
+ if (one_result == DNSSEC_VALIDATED) {
+ *result = DNSSEC_VALIDATED;
+ return 0;
+ }
/* If the signature is invalid, or done using
an unsupported algorithm, let's try another
@@ -560,12 +572,13 @@ int dnssec_verify_rrset_search(
}
if (found_dnskey)
- return DNSSEC_INVALID;
-
- if (found_rrsig)
- return DNSSEC_MISSING_KEY;
+ *result = DNSSEC_INVALID;
+ else if (found_rrsig)
+ *result = DNSSEC_MISSING_KEY;
+ else
+ *result = DNSSEC_NO_SIGNATURE;
- return DNSSEC_NO_SIGNATURE;
+ return 0;
}
int dnssec_canonicalize(const char *n, char *buffer, size_t buffer_max) {
@@ -653,16 +666,14 @@ int dnssec_verify_dnskey(DnsResourceRecord *dnskey, DnsResourceRecord *ds) {
if (dnskey->dnskey.protocol != 3)
return -EKEYREJECTED;
- if (!dnssec_algorithm_supported(dnskey->dnskey.algorithm))
- return -EOPNOTSUPP;
- if (!dnssec_digest_supported(ds->ds.digest_type))
- return -EOPNOTSUPP;
-
if (dnskey->dnskey.algorithm != ds->ds.algorithm)
return 0;
if (dnssec_keytag(dnskey) != ds->ds.key_tag)
return 0;
+ if (!dnssec_digest_supported(ds->ds.digest_type))
+ return -EOPNOTSUPP;
+
switch (ds->ds.digest_type) {
case DNSSEC_DIGEST_SHA1:
@@ -711,9 +722,44 @@ finish:
return r;
}
+int dnssec_verify_dnskey_search(DnsResourceRecord *dnskey, DnsAnswer *validated_ds) {
+ DnsResourceRecord *ds;
+ int r;
+
+ assert(dnskey);
+
+ if (dnskey->key->type != DNS_TYPE_DNSKEY)
+ return 0;
+
+ DNS_ANSWER_FOREACH(ds, validated_ds) {
+
+ if (ds->key->type != DNS_TYPE_DS)
+ continue;
+
+ r = dnssec_verify_dnskey(dnskey, ds);
+ if (r < 0)
+ return r;
+ if (r > 0)
+ return 1;
+ }
+
+ return 0;
+}
+
static const char* const dnssec_mode_table[_DNSSEC_MODE_MAX] = {
[DNSSEC_NO] = "no",
[DNSSEC_TRUST] = "trust",
[DNSSEC_YES] = "yes",
};
DEFINE_STRING_TABLE_LOOKUP(dnssec_mode, DnssecMode);
+
+static const char* const dnssec_result_table[_DNSSEC_RESULT_MAX] = {
+ [DNSSEC_VALIDATED] = "validated",
+ [DNSSEC_INVALID] = "invalid",
+ [DNSSEC_UNSIGNED] = "unsigned",
+ [DNSSEC_NO_SIGNATURE] = "no-signature",
+ [DNSSEC_MISSING_KEY] = "missing-key",
+ [DNSSEC_SIGNATURE_EXPIRED] = "signature-expired",
+ [DNSSEC_FAILED_AUXILIARY] = "failed-auxiliary",
+};
+DEFINE_STRING_TABLE_LOOKUP(dnssec_result, DnssecResult);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-12-30 23:09:24 +0000