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/*
* test-rsa.c
* ----------
* First stumblings towards a test harness for RSA using Cryptech
* ModExp core.
*
* For the moment this just does modular exponentiation tests using
* RSA keys and pre-formatted data-to-be-signed, without attempting
* CRT or any of the other clever stuff we should be doing. This is
* not usable for any sane purpose other than testing.
*
* Authors: Rob Austein
* Copyright (c) 2015, SUNET
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. 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.
*
* 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.
*/
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <sys/time.h>
#include "cryptech.h"
#include "test-rsa.h"
/*
* Run one modexp test.
*/
static int test_modexp(const char * const kind,
const rsa_tc_t * const tc,
const rsa_tc_bn_t * const msg, /* Input message */
const rsa_tc_bn_t * const exp, /* Exponent */
const rsa_tc_bn_t * const val) /* Expected result */
{
uint8_t result[tc->n.len];
printf("%s test for %lu-bit RSA key\n", kind, (unsigned long) tc->size);
if (hal_modexp(msg->val, msg->len, exp->val, exp->len,
tc->n.val, tc->n.len, result, sizeof(result)) != HAL_OK) {
printf("ModExp failed\n");
return 0;
}
if (memcmp(result, val->val, val->len)) {
printf("MISMATCH\n");
return 0;
}
return 1;
}
/*
* Run one RSA CRT test.
*/
static int test_crt(const char * const kind, const rsa_tc_t * const tc)
{
printf("%s test for %lu-bit RSA key\n", kind, (unsigned long) tc->size);
uint8_t keybuf[hal_rsa_key_t_size];
hal_error_t err = HAL_OK;
hal_rsa_key_t key;
if ((err = hal_rsa_key_load(RSA_PRIVATE, &key, keybuf, sizeof(keybuf),
tc->n.val, tc->n.len,
tc->e.val, tc->e.len,
tc->d.val, tc->d.len,
tc->p.val, tc->p.len,
tc->q.val, tc->q.len,
tc->u.val, tc->u.len,
tc->dP.val, tc->dP.len,
tc->dQ.val, tc->dQ.len)) != HAL_OK) {
printf("RSA CRT key load failed: %s\n", hal_error_string(err));
return 0;
}
uint8_t result[tc->n.len];
if ((err = hal_rsa_crt(key, tc->m.val, tc->m.len, result, sizeof(result))) != HAL_OK)
printf("RSA CRT failed: %s\n", hal_error_string(err));
const int mismatch = (err == HAL_OK && memcmp(result, tc->s.val, tc->s.len) != 0);
if (mismatch)
printf("MISMATCH\n");
hal_rsa_key_clear(key);
return err == HAL_OK && !mismatch;
}
/*
* Time a test.
*/
static void _time_check(const struct timeval t0, const int ok)
{
struct timeval t;
gettimeofday(&t, NULL);
t.tv_sec -= t0.tv_sec;
t.tv_usec = t0.tv_usec;
if (t.tv_usec < 0) {
t.tv_usec += 1000000;
t.tv_sec -= 1;
}
printf("Elapsed time %lu.%06lu seconds, %s\n",
(unsigned long) t.tv_sec,
(unsigned long) t.tv_usec,
ok ? "OK" : "FAILED");
}
#define time_check(_expr_) \
do { \
struct timeval _t; \
gettimeofday(&_t, NULL); \
int _ok = (_expr_); \
_time_check(_t, _ok); \
ok &= _ok; \
} while (0)
/*
* Test signature and exponentiation for one RSA keypair.
*/
static int test_rsa(const rsa_tc_t * const tc)
{
int ok = 1;
/* RSA encryption */
time_check(test_modexp("Verification", tc, &tc->s, &tc->e, &tc->m));
/* Brute force RSA decryption */
time_check(test_modexp("Signature (ModExp)", tc, &tc->m, &tc->d, &tc->s));
/* RSA decyrption using CRT */
time_check(test_crt("Signature (CRT)", tc));
return ok;
}
int main(int argc, char *argv[])
{
uint8_t name[8], version[4];
hal_error_t err;
int i;
/*
* Initialize EIM and report what core we're running.
*/
if ((err = hal_io_read(MODEXP_ADDR_NAME0, name, sizeof(name))) != HAL_OK ||
(err = hal_io_read(MODEXP_ADDR_VERSION, version, sizeof(version))) != HAL_OK) {
printf("Initialization failed: %s\n", hal_error_string(err));
return 1;
}
printf("\"%8.8s\" \"%4.4s\"\n\n", name, version);
/*
* Run the test cases.
*/
hal_modexp_set_debug(1);
/* Normal test */
for (i = 0; i < (sizeof(rsa_tc)/sizeof(*rsa_tc)); i++)
if (!test_rsa(&rsa_tc[i]))
return 1;
return 0;
}
/*
* Local variables:
* indent-tabs-mode: nil
* End:
*/
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