cc2538: Add PKA drivers, ECC algorithms and examples
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19 changed files with 4307 additions and 2 deletions
188
examples/cc2538dk/pka/ecc-ecdh.c
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188
examples/cc2538dk/pka/ecc-ecdh.c
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/*
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* Copyright (c) 2014, Institute for Pervasive Computing, ETH Zurich.
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* All rights reserved.
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*
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* Author: Andreas Dröscher <contiki@anticat.ch>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/**
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* \addtogroup cc2538-examples
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* @{
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*
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* \defgroup cc2538-ecdh-test cc2538dk ECDH Test Project
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*
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* ECDH example for CC2538 on SmartRF06EB.
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*
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* This example shows how ECDH should be used. The example also verifies
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* the ECDH functionality.
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*
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* @{
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*
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* \file
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* Example demonstrating ECDH on the cc2538dk platform
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*/
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#include "contiki.h"
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#include "ecc-algorithm.h"
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#include "ecc-curve.h"
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#include "random.h"
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#include "rtimer.h"
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#include "pt.h"
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#include <string.h>
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#include <stdio.h>
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static void
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ecc_set_random(uint32_t *secret)
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{
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int i;
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for(i = 0; i < 8; ++i) {
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secret[i] = (uint32_t)random_rand() | (uint32_t)random_rand() << 16;
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}
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}
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PROCESS(ecdh_test, "ecdh test");
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AUTOSTART_PROCESSES(&ecdh_test);
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PROCESS_THREAD(ecdh_test, ev, data) {
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PROCESS_BEGIN();
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/*
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* Variable for Time Measurement
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*/
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static rtimer_clock_t time;
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/*
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* Activate Engine
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*/
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puts("-----------------------------------------\n"
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"Initializing pka...");
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pka_init();
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/*
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* Generate secrets make sure they are valid (smaller as order)
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*/
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static ecc_compare_state_t state = {
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.process = &ecdh_test,
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.size = 8,
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};
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memcpy(state.b, nist_p_256.n, sizeof(uint32_t) * 8);
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static uint32_t secret_a[8];
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do {
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ecc_set_random(secret_a);
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memcpy(state.a, secret_a, sizeof(uint32_t) * 8);
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PT_SPAWN(&(ecdh_test.pt), &(state.pt), ecc_compare(&state));
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} while(state.result != PKA_STATUS_A_LT_B);
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static uint32_t secret_b[8];
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ecc_set_random(secret_b);
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do {
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ecc_set_random(secret_b);
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memcpy(state.a, secret_b, sizeof(uint32_t) * 8);
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PT_SPAWN(&(ecdh_test.pt), &(state.pt), ecc_compare(&state));
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} while(state.result != PKA_STATUS_A_LT_B);
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/*
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* Prepare Points
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*/
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static ecc_multiply_state_t side_a = {
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.process = &ecdh_test,
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.curve_info = &nist_p_256,
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};
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memcpy(side_a.point_in.x, nist_p_256.x, sizeof(uint32_t) * 8);
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memcpy(side_a.point_in.y, nist_p_256.y, sizeof(uint32_t) * 8);
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memcpy(side_a.secret, secret_a, sizeof(secret_a));
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static ecc_multiply_state_t side_b = {
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.process = &ecdh_test,
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.curve_info = &nist_p_256,
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};
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memcpy(side_b.point_in.x, nist_p_256.x, sizeof(uint32_t) * 8);
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memcpy(side_b.point_in.y, nist_p_256.y, sizeof(uint32_t) * 8);
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memcpy(side_b.secret, secret_b, sizeof(secret_b));
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/*
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* Round 1
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*/
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time = RTIMER_NOW();
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PT_SPAWN(&(ecdh_test.pt), &(side_a.pt), ecc_multiply(&side_a));
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time = RTIMER_NOW() - time;
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printf("Round 1, Side a: %i, %lu ms\n", (unsigned)side_a.result,
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(uint32_t)((uint64_t)time * 1000 / RTIMER_SECOND));
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time = RTIMER_NOW();
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PT_SPAWN(&(ecdh_test.pt), &(side_b.pt), ecc_multiply(&side_b));
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time = RTIMER_NOW() - time;
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printf("Round 1, Side b: %i, %lu ms\n", (unsigned)side_b.result,
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(uint32_t)((uint64_t)time * 1000 / RTIMER_SECOND));
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/*
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* Key Exchange
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*/
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memcpy(side_a.point_in.x, side_b.point_out.x, sizeof(uint32_t) * 8);
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memcpy(side_a.point_in.y, side_b.point_out.y, sizeof(uint32_t) * 8);
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memcpy(side_b.point_in.x, side_a.point_out.x, sizeof(uint32_t) * 8);
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memcpy(side_b.point_in.y, side_a.point_out.y, sizeof(uint32_t) * 8);
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/*
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* Round 2
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*/
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time = RTIMER_NOW();
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PT_SPAWN(&(ecdh_test.pt), &(side_a.pt), ecc_multiply(&side_a));
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time = RTIMER_NOW() - time;
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printf("Round 2, Side a: %i, %lu ms\n", (unsigned)side_a.result,
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(uint32_t)((uint64_t)time * 1000 / RTIMER_SECOND));
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time = RTIMER_NOW();
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PT_SPAWN(&(ecdh_test.pt), &(side_b.pt), ecc_multiply(&side_b));
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time = RTIMER_NOW() - time;
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printf("Round 2, Side b: %i, %lu ms\n", (unsigned)side_b.result,
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(uint32_t)((uint64_t)time * 1000 / RTIMER_SECOND));
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/*
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* Check Result
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*/
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memcpy(state.a, side_a.point_out.x, sizeof(uint32_t) * 8);
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memcpy(state.b, side_b.point_out.x, sizeof(uint32_t) * 8);
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PT_SPAWN(&(ecdh_test.pt), &(state.pt), ecc_compare(&state));
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if(state.result) {
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puts("shared secrets do not match");
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} else {
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puts("shared secrets MATCH");
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}
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puts("-----------------------------------------\n"
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"Disabling pka...");
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pka_disable();
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puts("Done!");
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PROCESS_END();
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}
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/*---------------------------------------------------------------------------*/
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/**
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* @}
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* @}
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*/
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