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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* SPDX-License-Identifier: MPL-2.0
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, you can obtain one at https://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
#include <isc/mem.h>
#include <isc/result.h>
#include <isc/util.h>
#include <dns/tsec.h>
#include <dns/tsig.h>
#include <dst/dst.h>
#define DNS_TSEC_MAGIC ISC_MAGIC('T', 's', 'e', 'c')
#define DNS_TSEC_VALID(t) ISC_MAGIC_VALID(t, DNS_TSEC_MAGIC)
/*%
* DNS Transaction Security object. We assume this is not shared by
* multiple threads, and so the structure does not contain a lock.
*/
struct dns_tsec {
unsigned int magic;
dns_tsectype_t type;
isc_mem_t *mctx;
union {
dns_tsigkey_t *tsigkey;
dst_key_t *key;
} ukey;
};
isc_result_t
dns_tsec_create(isc_mem_t *mctx, dns_tsectype_t type, dst_key_t *key,
dns_tsec_t **tsecp) {
isc_result_t result;
dns_tsec_t *tsec;
dns_tsigkey_t *tsigkey = NULL;
const dns_name_t *algname;
REQUIRE(mctx != NULL);
REQUIRE(tsecp != NULL && *tsecp == NULL);
tsec = isc_mem_get(mctx, sizeof(*tsec));
tsec->type = type;
tsec->mctx = mctx;
switch (type) {
case dns_tsectype_tsig:
switch (dst_key_alg(key)) {
case DST_ALG_HMACMD5:
algname = dns_tsig_hmacmd5_name;
break;
case DST_ALG_HMACSHA1:
algname = dns_tsig_hmacsha1_name;
break;
case DST_ALG_HMACSHA224:
algname = dns_tsig_hmacsha224_name;
break;
case DST_ALG_HMACSHA256:
algname = dns_tsig_hmacsha256_name;
break;
case DST_ALG_HMACSHA384:
algname = dns_tsig_hmacsha384_name;
break;
case DST_ALG_HMACSHA512:
algname = dns_tsig_hmacsha512_name;
break;
default:
isc_mem_put(mctx, tsec, sizeof(*tsec));
return (DNS_R_BADALG);
}
result = dns_tsigkey_createfromkey(dst_key_name(key), algname,
key, false, NULL, 0, 0, mctx,
NULL, &tsigkey);
if (result != ISC_R_SUCCESS) {
isc_mem_put(mctx, tsec, sizeof(*tsec));
return (result);
}
tsec->ukey.tsigkey = tsigkey;
break;
case dns_tsectype_sig0:
tsec->ukey.key = key;
break;
default:
UNREACHABLE();
}
tsec->magic = DNS_TSEC_MAGIC;
*tsecp = tsec;
return (ISC_R_SUCCESS);
}
void
dns_tsec_destroy(dns_tsec_t **tsecp) {
dns_tsec_t *tsec;
REQUIRE(tsecp != NULL && *tsecp != NULL);
tsec = *tsecp;
*tsecp = NULL;
REQUIRE(DNS_TSEC_VALID(tsec));
switch (tsec->type) {
case dns_tsectype_tsig:
dns_tsigkey_detach(&tsec->ukey.tsigkey);
break;
case dns_tsectype_sig0:
dst_key_free(&tsec->ukey.key);
break;
default:
UNREACHABLE();
}
tsec->magic = 0;
isc_mem_put(tsec->mctx, tsec, sizeof(*tsec));
}
dns_tsectype_t
dns_tsec_gettype(dns_tsec_t *tsec) {
REQUIRE(DNS_TSEC_VALID(tsec));
return (tsec->type);
}
void
dns_tsec_getkey(dns_tsec_t *tsec, void *keyp) {
REQUIRE(DNS_TSEC_VALID(tsec));
REQUIRE(keyp != NULL);
switch (tsec->type) {
case dns_tsectype_tsig:
dns_tsigkey_attach(tsec->ukey.tsigkey, (dns_tsigkey_t **)keyp);
break;
case dns_tsectype_sig0:
*(dst_key_t **)keyp = tsec->ukey.key;
break;
default:
UNREACHABLE();
}
}
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