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/*
* Part of DNS zone file validator `validns`.
*
* Copyright 2011-2014 Anton Berezin <tobez@tobez.org>
* Modified BSD license.
* (See LICENSE file in the distribution.)
*
*/
#include <sys/types.h>
#include <stdio.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string.h>
#include <ctype.h>
#include "common.h"
#include "textparse.h"
#include "mempool.h"
#include "carp.h"
#include "rr.h"
static struct rr* dhcid_parse(char *name, long ttl, int type, char *s)
{
struct rr_dhcid *rr = getmem(sizeof(*rr));
struct binary_data data;
data = extract_base64_binary_data(&s, "rdata");
if (data.length < 0) return NULL;
if (data.length < 3)
return bitch("rdata too short");
rr->id_type = data.data[0]*256 + data.data[1];
if (rr->id_type > 2)
return bitch("unsupported identifier type %s", rr->id_type);
rr->digest_type = data.data[2];
if (rr->digest_type != 1)
return bitch("unsupported digest type %s", rr->digest_type);
if (data.length != 35)
return bitch("wrong digest length, must be 32 for SHA-256");
/* let's cheat a bit */
data.length -= 3;
data.data += 3;
rr->digest = data;
if (*s) {
return bitch("garbage after valid DHCID data");
}
return store_record(type, name, ttl, rr);
}
static char* dhcid_human(struct rr *rrv)
{
return "...";
}
static struct binary_data dhcid_wirerdata(struct rr *rrv)
{
RRCAST(dhcid);
return compose_binary_data("21d", 1,
rr->id_type, rr->digest_type, rr->digest);
}
struct rr_methods dhcid_methods = { dhcid_parse, dhcid_human, dhcid_wirerdata, NULL, NULL };
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