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Timing self test: increased tolerance

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mbedtls_timing_self_test fails annoyingly often when running on a busy
machine such as can be expected of a continous integration system.
Increase the tolerances in the delay test, to reduce the chance of
failures that are only due to missing a deadline on a busy machine.
This commit is contained in:
Gilles Peskine 2017-10-17 19:39:04 +02:00
parent a66fb3f221
commit e2bf3b802a
1 changed files with 4 additions and 4 deletions
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8
library/timing.c
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@ -445,19 +445,19 @@ int mbedtls_timing_self_test( int verbose )
{ {
mbedtls_timing_set_delay( &ctx, a, a + b ); mbedtls_timing_set_delay( &ctx, a, a + b );
busy_msleep( a - a / 8 ); busy_msleep( a - a / 4 );
if( mbedtls_timing_get_delay( &ctx ) != 0 ) if( mbedtls_timing_get_delay( &ctx ) != 0 )
FAIL; FAIL;
busy_msleep( a / 4 ); busy_msleep( a / 2 );
if( mbedtls_timing_get_delay( &ctx ) != 1 ) if( mbedtls_timing_get_delay( &ctx ) != 1 )
FAIL; FAIL;
busy_msleep( b - a / 8 - b / 8 ); busy_msleep( b - a / 4 - b / 4 );
if( mbedtls_timing_get_delay( &ctx ) != 1 ) if( mbedtls_timing_get_delay( &ctx ) != 1 )
FAIL; FAIL;
busy_msleep( b / 4 ); busy_msleep( b / 2 );
if( mbedtls_timing_get_delay( &ctx ) != 2 ) if( mbedtls_timing_get_delay( &ctx ) != 2 )
FAIL; FAIL;
} }