1 files changed, 142 insertions, 0 deletions
diff --git a/src/libcharon/plugins/dnscert/dnscert.c b/src/libcharon/plugins/dnscert/dnscert.c
new file mode 100644
index 000000000..882ad9f0c
--- /dev/null
+++ b/src/libcharon/plugins/dnscert/dnscert.c
@@ -0,0 +1,142 @@
+/*
+ * Copyright (C) 2013 Ruslan Marchenko
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "dnscert.h"
+
+#include <library.h>
+#include <utils/debug.h>
+#include <bio/bio_reader.h>
+
+typedef struct private_dnscert_t private_dnscert_t;
+
+/**
+* private data of the dnscert
+*/
+struct private_dnscert_t {
+
+	/**
+	 * public functions
+	 */
+	dnscert_t public;
+
+	/**
+	 * Certificate type
+	 */
+	u_int16_t cert_type;
+
+	/**
+	 * Key tag
+	 */
+	u_int16_t key_tag;
+
+	/**
+	 * Algorithm
+	 */
+	u_int8_t algorithm;
+
+	/**
+	 * Certificate
+	 */
+	chunk_t certificate;
+};
+
+METHOD(dnscert_t, get_cert_type, dnscert_type_t,
+	private_dnscert_t *this)
+{
+	return this->cert_type;
+}
+
+METHOD(dnscert_t, get_key_tag, u_int16_t,
+	private_dnscert_t *this)
+{
+	return this->key_tag;
+}
+
+METHOD(dnscert_t, get_algorithm, dnscert_algorithm_t,
+	private_dnscert_t *this)
+{
+	return this->algorithm;
+}
+
+METHOD(dnscert_t, get_certificate, chunk_t,
+	private_dnscert_t *this)
+{
+	return this->certificate;
+}
+
+METHOD(dnscert_t, destroy, void,
+	private_dnscert_t *this)
+{
+	chunk_free(&this->certificate);
+	free(this);
+}
+
+dnscert_t *dnscert_create_frm_rr(rr_t *rr)
+{
+	private_dnscert_t *this;
+	bio_reader_t *reader = NULL;
+
+	INIT(this,
+			.public = {
+				.get_cert_type = _get_cert_type,
+				.get_key_tag  = _get_key_tag,
+				.get_algorithm = _get_algorithm,
+				.get_certificate = _get_certificate,
+				.destroy = _destroy,
+			},
+	);
+
+	if (rr->get_type(rr) != RR_TYPE_CERT)
+	{
+		DBG1(DBG_CFG, "unable to create a dnscert out of an RR "
+					  "whose type is not CERT");
+		free(this);
+		return NULL;
+	}
+
+	/**
+	 * Parse the content (RDATA field) of the RR
+	 * First - type/tag/algo fields and then cert body
+	 */
+	reader = bio_reader_create(rr->get_rdata(rr));
+	if (!reader->read_uint16(reader, &this->cert_type) ||
+		!reader->read_uint16(reader, &this->key_tag) ||
+		!reader->read_uint8(reader, &this->algorithm) )
+	{
+		DBG1(DBG_CFG, "CERT RR has a wrong format");
+		reader->destroy(reader);
+		free(this);
+		return NULL;
+	}
+
+	if (!reader->read_data(reader, reader->remaining(reader),
+						   &this->certificate))
+	{
+		DBG1(DBG_CFG, "failed to read DNS certificate field");
+		reader->destroy(reader);
+		free(this);
+		return NULL;
+	}
+	this->certificate = chunk_clone(this->certificate);
+	reader->destroy(reader);
+	return &this->public;
+}