1 files changed, 149 insertions, 0 deletions
diff --git a/lib/dns/tsec.c b/lib/dns/tsec.c
new file mode 100644
index 0000000..fcb7613
--- /dev/null
+++ b/lib/dns/tsec.c
@@ -0,0 +1,149 @@
+/*
+ * 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();
+	}
+}