Implemented Diffie Hellman Nonce attributes

1 files changed, 288 insertions, 0 deletions

diff --git a/src/libpts/tcg/tcg_pts_attr_dh_nonce_params_resp.c b/src/libpts/tcg/tcg_pts_attr_dh_nonce_params_resp.c
new file mode 100644
index 000000000..92d9cd740
--- /dev/null
+++ b/src/libpts/tcg/tcg_pts_attr_dh_nonce_params_resp.c
@@ -0,0 +1,288 @@
+/*
+ * Copyright (C) 2011 Sansar Choinyambuu
+ * HSR Hochschule fuer Technik Rapperswil
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ */
+
+#include "tcg_pts_attr_dh_nonce_params_resp.h"
+
+#include <pa_tnc/pa_tnc_msg.h>
+#include <bio/bio_writer.h>
+#include <bio/bio_reader.h>
+#include <debug.h>
+
+typedef struct private_tcg_pts_attr_dh_nonce_params_resp_t private_tcg_pts_attr_dh_nonce_params_resp_t;
+
+/**
+ * PTS DH Nonce Parameters Response
+ * see section 3.8.2 of PTS Protocol: Binding to TNC IF-M Specification
+ *
+ *					   1				   2				   3
+ *   0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  |					Reserved  					|   Nonce Len   |
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  |		Selected D-H Group		|   	Hash Algorithm Set		|
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  |						D-H Responder Nonce ...					|
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  |					D-H Responder Public Value ...				|
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  
+ */
+
+#define PTS_DH_NONCE_PARAMS_RESP_SIZE			16
+#define PTS_DH_NONCE_PARAMS_RESP_RESERVED		0x0000
+
+/**
+ * Private data of an tcg_pts_attr_dh_nonce_params_resp_t object.
+ */
+struct private_tcg_pts_attr_dh_nonce_params_resp_t {
+
+	/**
+	 * Public members of tcg_pts_attr_dh_nonce_params_resp_t
+	 */
+	tcg_pts_attr_dh_nonce_params_resp_t public;
+
+	/**
+	 * Attribute vendor ID
+	 */
+	pen_t vendor_id;
+
+	/**
+	 * Attribute type
+	 */
+	u_int32_t type;
+
+	/**
+	 * Attribute value
+	 */
+	chunk_t value;
+
+	/**
+	 * Noskip flag
+	 */
+	bool noskip_flag;
+	
+	/**
+	 * Length of nonce
+	 */
+	u_int8_t nonce_len;
+
+	/**
+	 * Selected Diffie Hellman group
+	 */
+	pts_dh_group_t dh_group;
+
+	/**
+	 * Supported Hashing Algorithms
+	 */
+	pts_meas_algorithms_t hash_algo_set;
+
+	/**
+	 * DH Responder Nonce
+	 */
+	chunk_t responder_nonce;
+
+	/**
+	 * DH Responder Public Value
+	 */
+	chunk_t responder_pub_val;
+	
+};
+
+METHOD(pa_tnc_attr_t, get_vendor_id, pen_t,
+	private_tcg_pts_attr_dh_nonce_params_resp_t *this)
+{
+	return this->vendor_id;
+}
+
+METHOD(pa_tnc_attr_t, get_type, u_int32_t,
+	private_tcg_pts_attr_dh_nonce_params_resp_t *this)
+{
+	return this->type;
+}
+
+METHOD(pa_tnc_attr_t, get_value, chunk_t,
+	private_tcg_pts_attr_dh_nonce_params_resp_t *this)
+{
+	return this->value;
+}
+
+METHOD(pa_tnc_attr_t, get_noskip_flag, bool,
+	private_tcg_pts_attr_dh_nonce_params_resp_t *this)
+{
+	return this->noskip_flag;
+}
+
+METHOD(pa_tnc_attr_t, set_noskip_flag,void,
+	private_tcg_pts_attr_dh_nonce_params_resp_t *this, bool noskip)
+{
+	this->noskip_flag = noskip;
+}
+
+METHOD(pa_tnc_attr_t, build, void,
+	private_tcg_pts_attr_dh_nonce_params_resp_t *this)
+{
+	bio_writer_t *writer;
+
+	writer = bio_writer_create(PTS_DH_NONCE_PARAMS_RESP_SIZE);
+	writer->write_uint24(writer, PTS_DH_NONCE_PARAMS_RESP_RESERVED);
+	writer->write_uint8 (writer, this->nonce_len);
+	writer->write_uint16(writer, this->dh_group);
+	writer->write_uint16(writer, this->hash_algo_set);
+	writer->write_data  (writer, this->responder_nonce);
+	writer->write_data  (writer, this->responder_pub_val);
+	
+	this->value = chunk_clone(writer->get_buf(writer));
+	writer->destroy(writer);
+}
+
+METHOD(pa_tnc_attr_t, process, status_t,
+	private_tcg_pts_attr_dh_nonce_params_resp_t *this, u_int32_t *offset)
+{
+	bio_reader_t *reader;
+	u_int32_t reserved;
+	u_int16_t dh_group, hash_algo_set;
+
+	if (this->value.len < PTS_DH_NONCE_PARAMS_RESP_SIZE)
+	{
+		DBG1(DBG_TNC, "insufficient data for PTS DH Nonce Parameters Response");
+		*offset = 0;
+		return FAILED;
+	}
+	reader = bio_reader_create(this->value);
+	reader->read_uint24(reader, &reserved);
+	reader->read_uint8 (reader, &this->nonce_len);
+	reader->read_uint16(reader, &dh_group);
+	this->dh_group = dh_group;
+	reader->read_uint16(reader, &hash_algo_set);
+	this->hash_algo_set = hash_algo_set;
+	reader->read_data(reader, this->nonce_len, &this->responder_nonce);
+	reader->read_data(reader, reader->remaining(reader), &this->responder_pub_val);
+	reader->destroy(reader);
+
+	return SUCCESS;
+}
+
+METHOD(pa_tnc_attr_t, destroy, void,
+	private_tcg_pts_attr_dh_nonce_params_resp_t *this)
+{
+	free(this->value.ptr);
+	free(this->responder_nonce.ptr);
+	free(this->responder_pub_val.ptr);
+	free(this);
+}
+
+METHOD(tcg_pts_attr_dh_nonce_params_resp_t, get_nonce_len, u_int8_t,
+	private_tcg_pts_attr_dh_nonce_params_resp_t *this)
+{
+	return this->nonce_len;
+}
+
+METHOD(tcg_pts_attr_dh_nonce_params_resp_t, get_dh_group, pts_dh_group_t,
+	private_tcg_pts_attr_dh_nonce_params_resp_t *this)
+{
+	return this->dh_group;
+}
+
+METHOD(tcg_pts_attr_dh_nonce_params_resp_t, get_hash_algo_set, pts_meas_algorithms_t,
+	private_tcg_pts_attr_dh_nonce_params_resp_t *this)
+{
+	return this->hash_algo_set;
+}
+
+METHOD(tcg_pts_attr_dh_nonce_params_resp_t, get_responder_nonce, chunk_t,
+	private_tcg_pts_attr_dh_nonce_params_resp_t *this)
+{
+	return this->responder_nonce;
+}
+
+METHOD(tcg_pts_attr_dh_nonce_params_resp_t, get_responder_pub_val, chunk_t,
+	private_tcg_pts_attr_dh_nonce_params_resp_t *this)
+{
+	return this->responder_pub_val;
+}
+
+/**
+ * Described in header.
+ */
+pa_tnc_attr_t *tcg_pts_attr_dh_nonce_params_resp_create(u_int8_t nonce_len,
+												pts_dh_group_t dh_group,
+												pts_meas_algorithms_t hash_algo_set,
+   												chunk_t responder_nonce,
+												chunk_t responder_pub_val)
+{
+	private_tcg_pts_attr_dh_nonce_params_resp_t *this;
+
+	INIT(this,
+		.public = {
+			.pa_tnc_attribute = {
+				.get_vendor_id = _get_vendor_id,
+				.get_type = _get_type,
+				.get_value = _get_value,
+				.get_noskip_flag = _get_noskip_flag,
+				.set_noskip_flag = _set_noskip_flag,
+				.build = _build,
+				.process = _process,
+				.destroy = _destroy,
+			},
+			.get_nonce_len = _get_nonce_len,
+			.get_dh_group = _get_dh_group,
+			.get_hash_algo_set = _get_hash_algo_set,
+			.get_responder_nonce = _get_responder_nonce,
+			.get_responder_pub_val = _get_responder_pub_val,
+		},
+		.vendor_id = PEN_TCG,
+		.type = TCG_PTS_DH_NONCE_PARAMS_RESP,
+		.nonce_len = nonce_len,
+		.dh_group = dh_group,
+		.hash_algo_set = hash_algo_set,
+		.responder_nonce = responder_nonce,
+		.responder_pub_val = responder_pub_val,
+	);
+
+	return &this->public.pa_tnc_attribute;
+}
+
+/**
+ * Described in header.
+ */
+pa_tnc_attr_t *tcg_pts_attr_dh_nonce_params_resp_create_from_data(chunk_t value)
+{
+	private_tcg_pts_attr_dh_nonce_params_resp_t *this;
+
+	INIT(this,
+		.public = {
+			.pa_tnc_attribute = {
+				.get_vendor_id = _get_vendor_id,
+				.get_type = _get_type,
+				.get_value = _get_value,
+				.get_noskip_flag = _get_noskip_flag,
+				.set_noskip_flag = _set_noskip_flag,
+				.build = _build,
+				.process = _process,
+				.destroy = _destroy,
+			},
+			.get_nonce_len = _get_nonce_len,
+			.get_dh_group = _get_dh_group,
+			.get_hash_algo_set = _get_hash_algo_set,
+			.get_responder_nonce = _get_responder_nonce,
+			.get_responder_pub_val = _get_responder_pub_val,
+		},
+		.vendor_id = PEN_TCG,
+		.type = TCG_PTS_DH_NONCE_PARAMS_RESP,
+		.value = chunk_clone(value),
+	);
+
+	return &this->public.pa_tnc_attribute;
+}