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Diffstat (limited to '')
| -rw-r--r-- | lib/dns/tsec.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/lib/dns/tsec.c b/lib/dns/tsec.c new file mode 100644 index 0000000..249a2ea --- /dev/null +++ b/lib/dns/tsec.c @@ -0,0 +1,151 @@ +/* + * 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/util.h> + +#include <pk11/site.h> + +#include <dns/result.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(); + } +} |