resolved: rr - add NSEC3 support

Needed for DNSSEC.

4 files changed, 157 insertions, 8 deletions

diff --git a/src/resolve/resolved-dns-packet.c b/src/resolve/resolved-dns-packet.c
index d2b3cb0eb1..e44d3926d9 100644
--- a/src/resolve/resolved-dns-packet.c
+++ b/src/resolve/resolved-dns-packet.c
@@ -825,6 +825,40 @@ int dns_packet_append_rr(DnsPacket *p, const DnsResourceRecord *rr, size_t *star
                         goto fail;
 
                 break;
+        case DNS_TYPE_NSEC3:
+                r = dns_packet_append_uint8(p, rr->nsec3.algorithm, NULL);
+                if (r < 0)
+                        goto fail;
+
+                r = dns_packet_append_uint8(p, rr->nsec3.flags, NULL);
+                if (r < 0)
+                        goto fail;
+
+                r = dns_packet_append_uint16(p, rr->nsec3.iterations, NULL);
+                if (r < 0)
+                        goto fail;
+
+                r = dns_packet_append_uint8(p, rr->nsec3.salt_size, NULL);
+                if (r < 0)
+                        goto fail;
+
+                r = dns_packet_append_blob(p, rr->nsec3.salt, rr->nsec3.salt_size, NULL);
+                if (r < 0)
+                        goto fail;
+
+                r = dns_packet_append_uint8(p, rr->nsec3.next_hashed_name_size, NULL);
+                if (r < 0)
+                        goto fail;
+
+                r = dns_packet_append_blob(p, rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size, NULL);
+                if (r < 0)
+                        goto fail;
+
+                r = dns_packet_append_types(p, rr->nsec3.types, NULL);
+                if (r < 0)
+                        goto fail;
+
+                break;
         case _DNS_TYPE_INVALID: /* unparseable */
         default:
 
@@ -1560,6 +1594,60 @@ int dns_packet_read_rr(DnsPacket *p, DnsResourceRecord **ret, size_t *start) {
                 }
 
                 break;
+
+        case DNS_TYPE_NSEC3: {
+                uint8_t size;
+
+                r = dns_packet_read_uint8(p, &rr->nsec3.algorithm, NULL);
+                if (r < 0)
+                        goto fail;
+
+                r = dns_packet_read_uint8(p, &rr->nsec3.flags, NULL);
+                if (r < 0)
+                        goto fail;
+
+                r = dns_packet_read_uint16(p, &rr->nsec3.iterations, NULL);
+                if (r < 0)
+                        goto fail;
+
+                r = dns_packet_read_uint8(p, &size, NULL);
+                if (r < 0)
+                        goto fail;
+
+                rr->nsec3.salt_size = size;
+
+                r = dns_packet_read_blob(p, &d, rr->nsec3.salt_size, NULL);
+                if (r < 0)
+                        goto fail;
+
+                rr->nsec3.salt = memdup(d, rr->nsec3.salt_size);
+                if (!rr->nsec3.salt) {
+                        r = -ENOMEM;
+                        goto fail;
+                }
+
+                r = dns_packet_read_uint8(p, &size, NULL);
+                if (r < 0)
+                        goto fail;
+
+                rr->nsec3.next_hashed_name_size = size;
+
+                r = dns_packet_read(p, rr->nsec3.next_hashed_name_size, &d, NULL);
+                if (r < 0)
+                        goto fail;
+
+                rr->nsec3.next_hashed_name = memdup(d, rr->nsec3.next_hashed_name_size);
+                if (!rr->nsec3.next_hashed_name) {
+                        r = -ENOMEM;
+                        goto fail;
+                }
+
+                r = dns_packet_append_types(p, rr->nsec3.types, NULL);
+                if (r < 0)
+                        goto fail;
+
+                break;
+        }
         default:
         unparseable:
                 r = dns_packet_read(p, rdlength, &d, NULL);
@@ -1694,13 +1782,15 @@ static const char* const dns_protocol_table[_DNS_PROTOCOL_MAX] = {
 DEFINE_STRING_TABLE_LOOKUP(dns_protocol, DnsProtocol);
 
 static const char* const dnssec_algorithm_table[_DNSSEC_ALGORITHM_MAX_DEFINED] = {
-        [DNSSEC_ALGORITHM_RSAMD5]     = "RSAMD5",
-        [DNSSEC_ALGORITHM_DH]         = "DH",
-        [DNSSEC_ALGORITHM_DSA]        = "DSA",
-        [DNSSEC_ALGORITHM_ECC]        = "ECC",
-        [DNSSEC_ALGORITHM_RSASHA1]    = "RSASHA1",
-        [DNSSEC_ALGORITHM_INDIRECT]   = "INDIRECT",
-        [DNSSEC_ALGORITHM_PRIVATEDNS] = "PRIVATEDNS",
-        [DNSSEC_ALGORITHM_PRIVATEOID] = "PRIVATEOID",
+        [DNSSEC_ALGORITHM_RSAMD5]             = "RSAMD5",
+        [DNSSEC_ALGORITHM_DH]                 = "DH",
+        [DNSSEC_ALGORITHM_DSA]                = "DSA",
+        [DNSSEC_ALGORITHM_ECC]                = "ECC",
+        [DNSSEC_ALGORITHM_RSASHA1]            = "RSASHA1",
+        [DNSSEC_ALGORITHM_DSA_NSEC3_SHA1]     = "DSA-NSEC3-SHA1",
+        [DNSSEC_ALGORITHM_RSASHA1_NSEC3_SHA1] = "RSASHA1-NSEC3-SHA1",
+        [DNSSEC_ALGORITHM_INDIRECT]           = "INDIRECT",
+        [DNSSEC_ALGORITHM_PRIVATEDNS]         = "PRIVATEDNS",
+        [DNSSEC_ALGORITHM_PRIVATEOID]         = "PRIVATEOID",
 };
 DEFINE_STRING_TABLE_LOOKUP(dnssec_algorithm, int);
diff --git a/src/resolve/resolved-dns-packet.h b/src/resolve/resolved-dns-packet.h
index 6588ed9df5..58559c85df 100644
--- a/src/resolve/resolved-dns-packet.h
+++ b/src/resolve/resolved-dns-packet.h
@@ -223,6 +223,8 @@ enum {
         DNSSEC_ALGORITHM_DSA,
         DNSSEC_ALGORITHM_ECC,
         DNSSEC_ALGORITHM_RSASHA1,
+        DNSSEC_ALGORITHM_DSA_NSEC3_SHA1,
+        DNSSEC_ALGORITHM_RSASHA1_NSEC3_SHA1,
         DNSSEC_ALGORITHM_INDIRECT = 252,
         DNSSEC_ALGORITHM_PRIVATEDNS,
         DNSSEC_ALGORITHM_PRIVATEOID,
diff --git a/src/resolve/resolved-dns-rr.c b/src/resolve/resolved-dns-rr.c
index 48fb3538ae..e9907eabc0 100644
--- a/src/resolve/resolved-dns-rr.c
+++ b/src/resolve/resolved-dns-rr.c
@@ -293,6 +293,12 @@ DnsResourceRecord* dns_resource_record_unref(DnsResourceRecord *rr) {
                         bitmap_free(rr->nsec.types);
                         break;
 
+                case DNS_TYPE_NSEC3:
+                        free(rr->nsec3.next_hashed_name);
+                        free(rr->nsec3.salt);
+                        bitmap_free(rr->nsec3.types);
+                        break;
+
                 case DNS_TYPE_LOC:
                 case DNS_TYPE_A:
                 case DNS_TYPE_AAAA:
@@ -457,6 +463,15 @@ int dns_resource_record_equal(const DnsResourceRecord *a, const DnsResourceRecor
                 return dns_name_equal(a->nsec.next_domain_name, b->nsec.next_domain_name) &&
                        bitmap_equal(a->nsec.types, b->nsec.types);
 
+        case DNS_TYPE_NSEC3:
+                return a->nsec3.algorithm == b->nsec3.algorithm &&
+                    a->nsec3.flags == b->nsec3.flags &&
+                    a->nsec3.iterations == b->nsec3.iterations &&
+                    a->nsec3.salt_size == b->nsec3.salt_size &&
+                    memcmp(a->nsec3.salt, b->nsec3.salt, a->nsec3.salt_size) == 0 &&
+                    memcmp(a->nsec3.next_hashed_name, b->nsec3.next_hashed_name, a->nsec3.next_hashed_name_size) == 0 &&
+                    bitmap_equal(a->nsec3.types, b->nsec3.types);
+
         default:
                 return a->generic.size == b->generic.size &&
                         memcmp(a->generic.data, b->generic.data, a->generic.size) == 0;
@@ -757,6 +772,37 @@ int dns_resource_record_to_string(const DnsResourceRecord *rr, char **ret) {
                         return -ENOMEM;
                 break;
 
+        case DNS_TYPE_NSEC3: {
+                _cleanup_free_ char *salt = NULL, *hash = NULL;
+
+                if (rr->nsec3.salt_size) {
+                        salt = hexmem(rr->nsec3.salt, rr->nsec3.salt_size);
+                        if (!salt)
+                                return -ENOMEM;
+                }
+
+                hash = base32hexmem(rr->nsec3.next_hashed_name, rr->nsec3.next_hashed_name_size, false);
+                if (!hash)
+                        return -ENOMEM;
+
+                t = format_types(rr->nsec3.types);
+                if (!t)
+                        return -ENOMEM;
+
+                r = asprintf(&s, "%s %"PRIu8" %"PRIu8" %"PRIu16" %s %s %s",
+                             k,
+                             rr->nsec3.algorithm,
+                             rr->nsec3.flags,
+                             rr->nsec3.iterations,
+                             rr->nsec3.salt_size ? salt : "-",
+                             hash,
+                             t);
+                if (r < 0)
+                        return -ENOMEM;
+
+                break;
+        }
+
         default:
                 t = hexmem(rr->generic.data, rr->generic.size);
                 if (!t)
diff --git a/src/resolve/resolved-dns-rr.h b/src/resolve/resolved-dns-rr.h
index eaaafb1f25..bdd5a5c824 100644
--- a/src/resolve/resolved-dns-rr.h
+++ b/src/resolve/resolved-dns-rr.h
@@ -151,6 +151,17 @@ struct DnsResourceRecord {
                         char *next_domain_name;
                         Bitmap *types;
                 } nsec;
+
+                struct {
+                        uint8_t algorithm;
+                        uint8_t flags;
+                        uint16_t iterations;
+                        void *salt;
+                        size_t salt_size;
+                        void *next_hashed_name;
+                        size_t next_hashed_name_size;
+                        Bitmap *types;
+                } nsec3;
         };
 };