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/* test_hmac_prng.c - TinyCrypt implementation of some HMAC-PRNG tests */
/*
* Copyright (C) 2015 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.
*
* test_hmac_prng.c -- Implementation of some HMAC-PRNG tests.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "hmac_prng.h"
static void fatal (const char *s) {
(void) fprintf (stderr, "%s\n", s);
exit (-1);
}
void show (const char *label, const uint8_t *s, size_t len) {
uint32_t i;
printf ("%s = ", label);
for (i = 0; i < (uint32_t) len; ++i) {
printf ("%02x", s[i]);
}
printf ("\n");
}
void printBinaryFile(const uint8_t *s, uint32_t slen) {
FILE *write_ptr;
write_ptr = fopen("pseudo-random-data.bin","wb");
fwrite(s, slen, 1, write_ptr);
}
int32_t main (void) {
printf ("Performing HMAC-PRNG tests...\n");
printf ("\tPerforming HMAC-PRNG test#1 (init, reseed, generate)...");
uint8_t seed[128];
struct hmac_prng_struct h;
uint32_t size = (1 << 19);
uint8_t random[size];
uint32_t i;
// Fake seed (replace by a a truly random seed):
for (i = 0; i < (uint32_t) sizeof (seed); ++i) {
seed[i] = i;
}
// Fake personalization and additional_input (replace by appropriate values):
uint8_t *personalization = (uint8_t *) "HOSTNAME";//e.g.: hostname+timestamp
uint8_t *additional_input = (uint8_t *) "additional input";
if (hmac_prng_init (&h, personalization, sizeof (personalization)) == 0) {
fatal ("HMAC-PRNG initialization failed.");
}
if (hmac_prng_reseed (&h, seed, sizeof (seed), additional_input,
sizeof (additional_input)) == 0) {
fatal ("HMAC-PRNG reseed failed.");
}
if (hmac_prng_generate (random, size, &h) < 1) {
fatal ("HMAC-PRNG generate failed.");
}
//printBinaryFile(random, size);
//show ("Pseudo-random data", random, size);
printf("Success!\n");
printf ("All HMAC tests succeeded!\n\n");
return 0;
}
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