6add267377
Move tinycrypt related header into test and make those tests only build on native_posix. The tests are unit tests, ie. testing tinycrypt functionality only without any dependency on the underlying system. Long term we should move those to be true unit tests and create functional and integration tests that use tinycrypt in the context of Zephyr and for real use-cases. Signed-off-by: Anas Nashif <anas.nashif@intel.com>
211 lines
6.9 KiB
C
211 lines
6.9 KiB
C
/* test_ecc_utils.c - TinyCrypt common functions for ECC tests */
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/* Copyright (c) 2014, Kenneth MacKay
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* All rights reserved.
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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 are met:
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND 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 COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.*/
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/*
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* Copyright (C) 2017 by Intel Corporation, All Rights Reserved.
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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 are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* - 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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*
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* - Neither the name of Intel Corporation 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 COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND 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 COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* test_ecc_utils.c -- Implementation of some common functions for ECC tests.
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*
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*/
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#include "test_ecc_utils.h"
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#include <tinycrypt/constants.h>
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#include <sys/util.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdbool.h>
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/*
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* Convert hex string to zero-padded nanoECC scalar
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*/
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void string2scalar(unsigned int *scalar, unsigned int num_word32, char *str)
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{
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unsigned int num_bytes = num_word32 * 4U;
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uint8_t tmp[num_bytes];
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size_t hexlen = strlen(str);
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int padding;
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padding = num_bytes * 2U - strlen(str);
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if (0 > padding) {
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printf("Error: 2 * num_bytes(%d) < strlen(hex) (%zu)\n",
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num_bytes * 2U, strlen(str));
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k_panic();
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}
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(void)memset(tmp, 0, padding / 2);
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if (hex2bin(str, hexlen, tmp + padding / 2, num_bytes) == 0) {
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k_panic();
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}
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uECC_vli_bytesToNative(scalar, tmp, num_bytes);
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}
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void vli_print_bytes(uint8_t *vli, unsigned int size)
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{
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for (unsigned i = 0; i < size; ++i) {
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printf("%02X ", (unsigned)vli[i]);
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}
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}
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void print_ecc_scalar(const char *label, const unsigned int *p_vli,
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unsigned int num_word32)
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{
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unsigned int i;
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if (label) {
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printf("%s = { ", label);
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}
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for (i = 0U; i < num_word32 - 1; ++i) {
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printf("0x%08lX, ", (unsigned long)p_vli[i]);
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}
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printf("0x%08lX", (unsigned long)p_vli[i]);
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if (label) {
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printf(" };\n");
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}
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}
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int check_ecc_result(const int num, const char *name,
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const unsigned int *expected,
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const unsigned int *computed,
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const unsigned int num_word32, const bool verbose)
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{
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uint32_t num_bytes = num_word32 * 4U;
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if (memcmp(computed, expected, num_bytes)) {
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TC_PRINT("\n Vector #%02d check %s - FAILURE:\n\n", num, name);
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print_ecc_scalar("Expected", expected, num_word32);
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print_ecc_scalar("Computed", computed, num_word32);
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TC_PRINT("\n");
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return TC_FAIL;
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}
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if (verbose) {
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TC_PRINT(" Vector #%02d check %s - success\n", num, name);
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}
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return TC_PASS;
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}
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int check_code(const int num, const int expected,
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const int computed, const int verbose)
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{
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if (expected != computed) {
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TC_ERROR("\n Vector #%02d check - FAILURE:\n", num);
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TC_ERROR("\n Expected: %d, computed: %d\n\n", expected, computed);
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return TC_FAIL;
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}
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if (verbose) {
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TC_PRINT(" Vector #%02d check - success (%d=%d)\n", num,
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expected, computed);
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}
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return TC_PASS;
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}
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/* Test ecc_make_keys, and also as keygen part of other tests */
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int keygen_vectors(char **d_vec, char **qx_vec, char **qy_vec, int tests,
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bool verbose)
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{
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unsigned int pub[2 * NUM_ECC_WORDS];
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unsigned int d[NUM_ECC_WORDS];
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unsigned int prv[NUM_ECC_WORDS];
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unsigned int result = TC_PASS;
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/* expected outputs (converted input vectors) */
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unsigned int exp_pub[2 * NUM_ECC_WORDS];
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unsigned int exp_prv[NUM_ECC_WORDS];
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for (int i = 0; i < tests; i++) {
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string2scalar(exp_prv, NUM_ECC_WORDS, d_vec[i]);
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string2scalar(exp_pub, NUM_ECC_WORDS, qx_vec[i]);
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string2scalar(exp_pub + NUM_ECC_WORDS, NUM_ECC_WORDS, qy_vec[i]);
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/*
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* Feed prvkey vector as padded random seed into ecc_make_key.
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* Internal mod-reduction will be zero-op and generate correct prv/pub
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*/
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(void)memset(d, 0, sizeof(d));
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string2scalar(d, NUM_ECC_WORDS, d_vec[i]);
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uint8_t pub_bytes[2 * NUM_ECC_BYTES];
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uint8_t prv_bytes[NUM_ECC_BYTES];
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uECC_make_key_with_d(pub_bytes, prv_bytes, d, uECC_secp256r1());
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uECC_vli_bytesToNative(prv, prv_bytes, NUM_ECC_BYTES);
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uECC_vli_bytesToNative(pub, pub_bytes, NUM_ECC_BYTES);
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uECC_vli_bytesToNative(pub + NUM_ECC_WORDS, pub_bytes + NUM_ECC_BYTES, NUM_ECC_BYTES);
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/* validate correctness of vector conversion and make_key() */
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result = check_ecc_result(i, "prv ", exp_prv, prv, NUM_ECC_WORDS, verbose);
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if (result == TC_FAIL) {
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return result;
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}
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result = check_ecc_result(i, "pub.x", exp_pub, pub, NUM_ECC_WORDS, verbose);
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if (result == TC_FAIL) {
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return result;
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}
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result = check_ecc_result(i, "pub.y", exp_pub + NUM_ECC_WORDS, pub + NUM_ECC_WORDS, NUM_ECC_WORDS, verbose);
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if (result == TC_FAIL) {
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return result;
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}
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}
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return result;
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}
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