285 lines
7.3 KiB
C
285 lines
7.3 KiB
C
/*
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* Copyright (C) 2011-2012 Sansar Choinyambuu, Andreas Steffen
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* HSR Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include "tcg_pts_attr_dh_nonce_params_resp.h"
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#include <pa_tnc/pa_tnc_msg.h>
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#include <bio/bio_writer.h>
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#include <bio/bio_reader.h>
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#include <utils/debug.h>
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typedef struct private_tcg_pts_attr_dh_nonce_params_resp_t
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private_tcg_pts_attr_dh_nonce_params_resp_t;
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/**
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* PTS DH Nonce Parameters Response
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* see section 3.8.2 of PTS Protocol: Binding to TNC IF-M Specification
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*
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* 1 2 3
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* 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
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Reserved | Nonce Len |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | Selected D-H Group | Hash Algorithm Set |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | D-H Responder Nonce ... |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | D-H Responder Public Value ... |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*
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*/
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#define PTS_DH_NONCE_PARAMS_RESP_SIZE 16
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#define PTS_DH_NONCE_PARAMS_RESP_RESERVED 0x0000
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/**
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* Private data of an tcg_pts_attr_dh_nonce_params_resp_t object.
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*/
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struct private_tcg_pts_attr_dh_nonce_params_resp_t {
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/**
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* Public members of tcg_pts_attr_dh_nonce_params_resp_t
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*/
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tcg_pts_attr_dh_nonce_params_resp_t public;
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/**
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* Vendor-specific attribute type
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*/
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pen_type_t type;
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/**
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* Attribute value
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*/
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chunk_t value;
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/**
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* Noskip flag
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*/
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bool noskip_flag;
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/**
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* Selected Diffie Hellman group
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*/
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pts_dh_group_t dh_group;
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/**
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* Supported Hashing Algorithms
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*/
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pts_meas_algorithms_t hash_algo_set;
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/**
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* DH Responder Nonce
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*/
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chunk_t responder_nonce;
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/**
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* DH Responder Public Value
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*/
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chunk_t responder_value;
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/**
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* Reference count
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*/
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refcount_t ref;
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};
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METHOD(pa_tnc_attr_t, get_type, pen_type_t,
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private_tcg_pts_attr_dh_nonce_params_resp_t *this)
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{
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return this->type;
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}
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METHOD(pa_tnc_attr_t, get_value, chunk_t,
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private_tcg_pts_attr_dh_nonce_params_resp_t *this)
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{
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return this->value;
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}
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METHOD(pa_tnc_attr_t, get_noskip_flag, bool,
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private_tcg_pts_attr_dh_nonce_params_resp_t *this)
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{
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return this->noskip_flag;
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}
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METHOD(pa_tnc_attr_t, set_noskip_flag,void,
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private_tcg_pts_attr_dh_nonce_params_resp_t *this, bool noskip)
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{
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this->noskip_flag = noskip;
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}
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METHOD(pa_tnc_attr_t, build, void,
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private_tcg_pts_attr_dh_nonce_params_resp_t *this)
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{
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bio_writer_t *writer;
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if (this->value.ptr)
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{
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return;
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}
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writer = bio_writer_create(PTS_DH_NONCE_PARAMS_RESP_SIZE);
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writer->write_uint24(writer, PTS_DH_NONCE_PARAMS_RESP_RESERVED);
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writer->write_uint8 (writer, this->responder_nonce.len);
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writer->write_uint16(writer, this->dh_group);
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writer->write_uint16(writer, this->hash_algo_set);
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writer->write_data (writer, this->responder_nonce);
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writer->write_data (writer, this->responder_value);
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this->value = writer->extract_buf(writer);
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writer->destroy(writer);
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}
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METHOD(pa_tnc_attr_t, process, status_t,
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private_tcg_pts_attr_dh_nonce_params_resp_t *this, u_int32_t *offset)
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{
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bio_reader_t *reader;
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u_int32_t reserved;
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u_int8_t nonce_len;
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u_int16_t dh_group, hash_algo_set;
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if (this->value.len < PTS_DH_NONCE_PARAMS_RESP_SIZE)
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{
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DBG1(DBG_TNC, "insufficient data for PTS DH Nonce Parameters Response");
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*offset = 0;
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return FAILED;
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}
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reader = bio_reader_create(this->value);
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reader->read_uint24(reader, &reserved);
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reader->read_uint8 (reader, &nonce_len);
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reader->read_uint16(reader, &dh_group);
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reader->read_uint16(reader, &hash_algo_set);
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reader->read_data(reader, nonce_len, &this->responder_nonce);
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reader->read_data(reader, reader->remaining(reader), &this->responder_value);
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this->dh_group = dh_group;
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this->hash_algo_set = hash_algo_set;
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this->responder_nonce = chunk_clone(this->responder_nonce);
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this->responder_value = chunk_clone(this->responder_value);
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reader->destroy(reader);
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return SUCCESS;
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}
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METHOD(pa_tnc_attr_t, get_ref, pa_tnc_attr_t*,
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private_tcg_pts_attr_dh_nonce_params_resp_t *this)
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{
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ref_get(&this->ref);
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return &this->public.pa_tnc_attribute;
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}
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METHOD(pa_tnc_attr_t, destroy, void,
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private_tcg_pts_attr_dh_nonce_params_resp_t *this)
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{
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if (ref_put(&this->ref))
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{
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free(this->value.ptr);
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free(this->responder_nonce.ptr);
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free(this->responder_value.ptr);
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free(this);
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}
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}
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METHOD(tcg_pts_attr_dh_nonce_params_resp_t, get_dh_group, pts_dh_group_t,
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private_tcg_pts_attr_dh_nonce_params_resp_t *this)
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{
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return this->dh_group;
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}
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METHOD(tcg_pts_attr_dh_nonce_params_resp_t, get_hash_algo_set,
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pts_meas_algorithms_t, private_tcg_pts_attr_dh_nonce_params_resp_t *this)
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{
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return this->hash_algo_set;
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}
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METHOD(tcg_pts_attr_dh_nonce_params_resp_t, get_responder_nonce, chunk_t,
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private_tcg_pts_attr_dh_nonce_params_resp_t *this)
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{
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return this->responder_nonce;
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}
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METHOD(tcg_pts_attr_dh_nonce_params_resp_t, get_responder_value, chunk_t,
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private_tcg_pts_attr_dh_nonce_params_resp_t *this)
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{
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return this->responder_value;
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}
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/**
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* Described in header.
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*/
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pa_tnc_attr_t *tcg_pts_attr_dh_nonce_params_resp_create(pts_dh_group_t dh_group,
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pts_meas_algorithms_t hash_algo_set,
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chunk_t responder_nonce,
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chunk_t responder_value)
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{
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private_tcg_pts_attr_dh_nonce_params_resp_t *this;
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INIT(this,
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.public = {
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.pa_tnc_attribute = {
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.get_type = _get_type,
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.get_value = _get_value,
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.get_noskip_flag = _get_noskip_flag,
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.set_noskip_flag = _set_noskip_flag,
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.build = _build,
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.process = _process,
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.get_ref = _get_ref,
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.destroy = _destroy,
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},
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.get_dh_group = _get_dh_group,
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.get_hash_algo_set = _get_hash_algo_set,
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.get_responder_nonce = _get_responder_nonce,
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.get_responder_value = _get_responder_value,
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},
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.type = { PEN_TCG, TCG_PTS_DH_NONCE_PARAMS_RESP },
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.dh_group = dh_group,
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.hash_algo_set = hash_algo_set,
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.responder_nonce = chunk_clone(responder_nonce),
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.responder_value = responder_value,
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.ref = 1,
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);
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return &this->public.pa_tnc_attribute;
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}
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/**
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* Described in header.
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*/
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pa_tnc_attr_t *tcg_pts_attr_dh_nonce_params_resp_create_from_data(chunk_t value)
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{
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private_tcg_pts_attr_dh_nonce_params_resp_t *this;
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INIT(this,
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.public = {
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.pa_tnc_attribute = {
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.get_type = _get_type,
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.get_value = _get_value,
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.get_noskip_flag = _get_noskip_flag,
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.set_noskip_flag = _set_noskip_flag,
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.build = _build,
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.process = _process,
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.get_ref = _get_ref,
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.destroy = _destroy,
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},
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.get_dh_group = _get_dh_group,
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.get_hash_algo_set = _get_hash_algo_set,
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.get_responder_nonce = _get_responder_nonce,
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.get_responder_value = _get_responder_value,
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},
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.type = { PEN_TCG, TCG_PTS_DH_NONCE_PARAMS_RESP },
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.value = chunk_clone(value),
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.ref = 1,
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);
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return &this->public.pa_tnc_attribute;
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}
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