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/* test_hmac_prng.c - TinyCrypt implementation of some HMAC-PRNG tests */
/*
* Copyright (C) 2017 by Intel Corporation, All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Intel Corporation nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
DESCRIPTION
This module tests the following PRNG routines:
Scenarios tested include:
- HMAC-PRNG init
- HMAC-PRNG reseed
- HMAC-PRNG generate)
*/
#include <tinycrypt/hmac_prng.h>
#include <tinycrypt/constants.h>
#include <test_utils.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define TC_DEBUG_MODE 0
#ifdef TC_DEBUG_MODE
void show(const char *label, const uint8_t *s, size_t len)
{
unsigned int i;
printf ("%s = ", label);
for (i = 0; i < (unsigned int) len; ++i) {
printf ("%02x", s[i]);
}
printf ("\n");
}
void printBinaryFile(const uint8_t *s, unsigned int slen)
{
FILE *write_ptr;
write_ptr = fopen("pseudo-random-data.bin","wb");
fwrite(s, slen, 1, write_ptr);
}
#endif
/*
* Main task to test AES
*/
int main(void)
{
uint8_t seed[128];
struct tc_hmac_prng_struct h;
unsigned int size = (1 << 19);
uint8_t random[size];
unsigned int i;
unsigned int result = TC_PASS;
TC_START("Performing HMAC-PRNG tests:");
TC_PRINT("HMAC-PRNG test#1 (init, reseed, generate):\n");
/* Fake seed (replace by a a truly random seed): */
for (i = 0; i < (unsigned int) sizeof(seed); ++i) {
seed[i] = i;
}
/* Fake personalization and additional_input (replace by appropriate
* values): *
* e.g.: hostname+timestamp */
uint8_t *personalization = (uint8_t *) "HOSTNAME";
uint8_t *additional_input = (uint8_t *) "additional input";
TC_PRINT("HMAC-PRNG test#1 (init):\n");
if (tc_hmac_prng_init(&h, personalization,
sizeof(personalization)) == 0) {
TC_ERROR("HMAC-PRNG initialization failed.\n");
result = TC_FAIL;
goto exitTest;
}
TC_END_RESULT(result);
TC_PRINT("HMAC-PRNG test#1 (reseed):\n");
if (tc_hmac_prng_reseed(&h, seed, sizeof(seed), additional_input,
sizeof(additional_input)) == 0) {
TC_ERROR("HMAC-PRNG reseed failed.\n");
result = TC_FAIL;
goto exitTest;
}
TC_END_RESULT(result);
TC_PRINT("HMAC-PRNG test#1 (generate):\n");
if (tc_hmac_prng_generate(random, size, &h) < 1) {
TC_ERROR("HMAC-PRNG generate failed.\n");
result = TC_FAIL;
goto exitTest;
}
TC_END_RESULT(result);
#ifdef TC_DEBUG_MODE
printBinaryFile(random, size);
show ("Pseudo-random data", random, size);
#endif
TC_PRINT("All HMAC tests succeeded!\n");
exitTest:
TC_END_RESULT(result);
TC_END_REPORT(result);
}
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