1 files changed, 65 insertions, 0 deletions
diff --git a/lib/dns/include/dns/ds.h b/lib/dns/include/dns/ds.h
new file mode 100644
index 0000000..629729b
--- /dev/null
+++ b/lib/dns/include/dns/ds.h
@@ -0,0 +1,65 @@
+/*
+ * 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.
+ */
+
+#pragma once
+
+#include <isc/lang.h>
+
+#include <dns/rdatastruct.h>
+#include <dns/types.h>
+
+#define DNS_DSDIGEST_SHA1   (1)
+#define DNS_DSDIGEST_SHA256 (2)
+#define DNS_DSDIGEST_GOST   (3)
+#define DNS_DSDIGEST_SHA384 (4)
+
+/*
+ * Assuming SHA-384 digest type.
+ */
+#define DNS_DS_BUFFERSIZE (52)
+
+ISC_LANG_BEGINDECLS
+
+isc_result_t
+dns_ds_fromkeyrdata(const dns_name_t *owner, dns_rdata_t *key,
+		    dns_dsdigest_t digest_type, unsigned char *digest,
+		    dns_rdata_ds_t *dsrdata);
+/*%<
+ * Build a DS rdata structure from a key.
+ *
+ * Requires:
+ *\li	key	Points to a valid DNSKEY or CDNSKEY record.
+ *\li	buffer	Points to a buffer of at least
+ * 		#ISC_MAX_MD_SIZE bytes.
+ */
+
+isc_result_t
+dns_ds_buildrdata(dns_name_t *owner, dns_rdata_t *key,
+		  dns_dsdigest_t digest_type, unsigned char *buffer,
+		  dns_rdata_t *rdata);
+/*%<
+ * Similar to dns_ds_fromkeyrdata(), but copies the DS into a
+ * dns_rdata object.
+ *
+ * Requires:
+ *\li	key	Points to a valid DNSKEY or CDNSKEY record.
+ *\li	buffer	Points to a buffer of at least
+ * 		#DNS_DS_BUFFERSIZE bytes.
+ *\li	rdata	Points to an initialized dns_rdata_t.
+ *
+ * Ensures:
+ *  \li    *rdata	Contains a valid DS rdata.  The 'data' member refers
+ *		to 'buffer'.
+ */
+
+ISC_LANG_ENDDECLS