Timing self test: increased duration

Increase the duration of the self test, otherwise it tends to fail on
a busy machine even with the recently upped tolerance. But run the
loop only once, it's enough for a simple smoke test.
This commit is contained in:
Gilles Peskine 2017-10-27 18:42:32 +02:00
parent e2bf3b802a
commit d39496233b
2 changed files with 14 additions and 18 deletions

View file

@ -16,6 +16,8 @@ Features
* Allow comments in test data files.
* The selftest program can execute a subset of the tests based on command
line arguments.
* Improve the timing self-tests to be more robust when run on a
heavily-loaded machine.
Bugfix
* Fix ssl_parse_record_header() to silently discard invalid DTLS records

View file

@ -439,28 +439,22 @@ int mbedtls_timing_self_test( int verbose )
if( verbose != 0 )
mbedtls_printf( " TIMING test #2 (set/get_delay ): " );
for( a = 200; a <= 400; a += 200 )
{
for( b = 200; b <= 400; b += 200 )
{
mbedtls_timing_set_delay( &ctx, a, a + b );
a = 800;
b = 400;
mbedtls_timing_set_delay( &ctx, a, a + b ); /* T = 0 */
busy_msleep( a - a / 4 );
if( mbedtls_timing_get_delay( &ctx ) != 0 )
FAIL;
busy_msleep( a - a / 4 ); /* T = a - a/4 */
if( mbedtls_timing_get_delay( &ctx ) != 0 )
FAIL;
busy_msleep( a / 2 );
if( mbedtls_timing_get_delay( &ctx ) != 1 )
FAIL;
busy_msleep( a / 4 + b / 4 ); /* T = a + b/4 */
if( mbedtls_timing_get_delay( &ctx ) != 1 )
FAIL;
busy_msleep( b - a / 4 - b / 4 );
if( mbedtls_timing_get_delay( &ctx ) != 1 )
FAIL;
busy_msleep( b / 2 );
if( mbedtls_timing_get_delay( &ctx ) != 2 )
FAIL;
}
busy_msleep( b ); /* T = a + b + b/4 */
if( mbedtls_timing_get_delay( &ctx ) != 2 )
FAIL;
}
mbedtls_timing_set_delay( &ctx, 0, 0 );