/*
* rdbx_driver . c
*
* driver for the rdbx implementation ( replay database with extended range )
*
* David A . McGrew
* Cisco Systems , Inc .
*/
/*
*
* Copyright ( c ) 2001 - 2017 , Cisco Systems , Inc .
* 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 the Cisco Systems , Inc . 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 HOLDERS 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 .
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h> /* for printf() */
#include "getopt_s.h" /* for local getopt() */
#include "rdbx.h"
#include "cipher_priv.h"
#ifdef ROC_TEST
#error "srtp_rdbx_t won't work with ROC_TEST - bitmask same size as seq_median"
#endif
#include "ut_sim.h"
srtp_err_status_t test_replay_dbx(int num_trials, unsigned long ws);
double rdbx_check_adds_per_second(int num_trials, unsigned long ws);
void usage(char *prog_name)
{
printf("usage: %s [ -t | -v ]\n" , prog_name);
exit (255 );
}
int main(int argc, char *argv[])
{
double rate;
srtp_err_status_t status;
int q;
unsigned do_timing_test = 0 ;
unsigned do_validation = 0 ;
/* process input arguments */
while (1 ) {
q = getopt_s(argc, argv, "tv" );
if (q == -1 )
break ;
switch (q) {
case 't' :
do_timing_test = 1 ;
break ;
case 'v' :
do_validation = 1 ;
break ;
default :
usage(argv[0 ]);
}
}
printf("rdbx (replay database w/ extended range) test driver\n"
"David A. McGrew\n"
"Cisco Systems, Inc.\n" );
if (!do_validation && !do_timing_test)
usage(argv[0 ]);
if (do_validation) {
printf("testing srtp_rdbx_t (ws=128)...\n" );
status = test_replay_dbx(1 << 12 , 128 );
if (status) {
printf("failed\n" );
exit (1 );
}
printf("passed\n" );
printf("testing srtp_rdbx_t (ws=1024)...\n" );
status = test_replay_dbx(1 << 12 , 1024 );
if (status) {
printf("failed\n" );
exit (1 );
}
printf("passed\n" );
}
if (do_timing_test) {
rate = rdbx_check_adds_per_second(1 << 18 , 128 );
printf("rdbx_check/replay_adds per second (ws=128): %e\n" , rate);
rate = rdbx_check_adds_per_second(1 << 18 , 1024 );
printf("rdbx_check/replay_adds per second (ws=1024): %e\n" , rate);
}
return 0 ;
}
/*
* rdbx_check_add ( rdbx , idx ) checks a known - to - be - good idx against
* rdbx , then adds it . if a failure is detected ( i . e . , the check
* indicates that the value is already in rdbx ) then
* srtp_err_status_algo_fail is returned .
*
*/
srtp_err_status_t rdbx_check_add(srtp_rdbx_t *rdbx, uint32_t idx)
{
int delta;
srtp_xtd_seq_num_t est;
delta = srtp_index_guess(&rdbx->index, &est, idx);
if (srtp_rdbx_check(rdbx, delta) != srtp_err_status_ok) {
printf("replay_check failed at index %u\n" , idx);
return srtp_err_status_algo_fail;
}
/*
* in practice , we ' d authenticate the packet containing idx , using
* the estimated value est , at this point
*/
if (srtp_rdbx_add_index(rdbx, delta) != srtp_err_status_ok) {
printf("rdbx_add_index failed at index %u\n" , idx);
return srtp_err_status_algo_fail;
}
return srtp_err_status_ok;
}
/*
* rdbx_check_expect_failure ( srtp_rdbx_t * rdbx , uint32_t idx )
*
* checks that a sequence number idx is in the replay database
* and thus will be rejected
*/
srtp_err_status_t rdbx_check_expect_failure(srtp_rdbx_t *rdbx, uint32_t idx)
{
int delta;
srtp_xtd_seq_num_t est;
srtp_err_status_t status;
delta = srtp_index_guess(&rdbx->index, &est, idx);
status = srtp_rdbx_check(rdbx, delta);
if (status == srtp_err_status_ok) {
printf("delta: %d " , delta);
printf("replay_check failed at index %u (false positive)\n" , idx);
return srtp_err_status_algo_fail;
}
return srtp_err_status_ok;
}
srtp_err_status_t rdbx_check_add_unordered(srtp_rdbx_t *rdbx, uint32_t idx)
{
int delta;
srtp_xtd_seq_num_t est;
srtp_err_status_t rstat;
delta = srtp_index_guess(&rdbx->index, &est, idx);
rstat = srtp_rdbx_check(rdbx, delta);
if ((rstat != srtp_err_status_ok) &&
(rstat != srtp_err_status_replay_old)) {
printf("replay_check_add_unordered failed at index %u\n" , idx);
return srtp_err_status_algo_fail;
}
if (rstat == srtp_err_status_replay_old) {
return srtp_err_status_ok;
}
if (srtp_rdbx_add_index(rdbx, delta) != srtp_err_status_ok) {
printf("rdbx_add_index failed at index %u\n" , idx);
return srtp_err_status_algo_fail;
}
return srtp_err_status_ok;
}
srtp_err_status_t test_replay_dbx(int num_trials, unsigned long ws)
{
srtp_rdbx_t rdbx;
uint32_t idx, ircvd;
ut_connection utc;
srtp_err_status_t status;
int num_fp_trials;
status = srtp_rdbx_init(&rdbx, ws);
if (status) {
printf("replay_init failed with error code %d\n" , status);
exit (1 );
}
/*
* test sequential insertion
*/
printf("\ttesting sequential insertion..." );
for (idx = 0 ; (int )idx < num_trials; idx++) {
status = rdbx_check_add(&rdbx, idx);
if (status)
return status;
}
printf("passed\n" );
/*
* test for false positives by checking all of the index
* values which we ' ve just added
*
* note that we limit the number of trials here , since allowing the
* rollover counter to roll over would defeat this test
*/
num_fp_trials = num_trials % 0 x10000;
if (num_fp_trials == 0 ) {
printf("warning: no false positive tests performed\n" );
}
printf("\ttesting for false positives..." );
for (idx = 0 ; (int )idx < num_fp_trials; idx++) {
status = rdbx_check_expect_failure(&rdbx, idx);
if (status)
return status;
}
printf("passed\n" );
/* re-initialize */
srtp_rdbx_dealloc(&rdbx);
if (srtp_rdbx_init(&rdbx, ws) != srtp_err_status_ok) {
printf("replay_init failed\n" );
return srtp_err_status_init_fail;
}
/*
* test non - sequential insertion
*
* this test covers only fase negatives , since the values returned
* by ut_next_index ( . . . ) are distinct
*/
ut_init(&utc);
printf("\ttesting non-sequential insertion..." );
for (idx = 0 ; (int )idx < num_trials; idx++) {
ircvd = ut_next_index(&utc);
status = rdbx_check_add_unordered(&rdbx, ircvd);
if (status)
return status;
status = rdbx_check_expect_failure(&rdbx, ircvd);
if (status)
return status;
}
printf("passed\n" );
/* re-initialize */
srtp_rdbx_dealloc(&rdbx);
if (srtp_rdbx_init(&rdbx, ws) != srtp_err_status_ok) {
printf("replay_init failed\n" );
return srtp_err_status_init_fail;
}
/*
* test insertion with large gaps .
* check for false positives for each insertion .
*/
printf("\ttesting insertion with large gaps..." );
for (idx = 0 , ircvd = 0 ; (int )idx < num_trials;
idx++, ircvd += (1 << (srtp_cipher_rand_u32_for_tests() % 12 ))) {
status = rdbx_check_add(&rdbx, ircvd);
if (status)
return status;
status = rdbx_check_expect_failure(&rdbx, ircvd);
if (status)
return status;
}
printf("passed\n" );
srtp_rdbx_dealloc(&rdbx);
return srtp_err_status_ok;
}
#include <time.h> /* for clock() */
double rdbx_check_adds_per_second(int num_trials, unsigned long ws)
{
uint32_t i;
int delta;
srtp_rdbx_t rdbx;
srtp_xtd_seq_num_t est;
clock_t timer;
int failures; /* count number of failures */
if (srtp_rdbx_init(&rdbx, ws) != srtp_err_status_ok) {
printf("replay_init failed\n" );
exit (1 );
}
failures = 0 ;
timer = clock();
for (i = 0 ; (int )i < num_trials; i++) {
delta = srtp_index_guess(&rdbx.index, &est, i);
if (srtp_rdbx_check(&rdbx, delta) != srtp_err_status_ok)
++failures;
else if (srtp_rdbx_add_index(&rdbx, delta) != srtp_err_status_ok)
++failures;
}
timer = clock() - timer;
if (timer < 1 ) {
timer = 1 ;
}
printf("number of failures: %d \n" , failures);
srtp_rdbx_dealloc(&rdbx);
return (double )CLOCKS_PER_SEC * num_trials / timer;
}
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