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Add provision to create the entropy seedfile for selftest sample

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In the selftest sample application, if no seedfile is present, one will be
created so the test can execute.
This commit is contained in:
Simon Butcher 2016-06-18 22:45:37 +01:00
parent 6dc7c9c5e1
commit b6a73c9b76
1 changed files with 40 additions and 0 deletions
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40
programs/test/selftest.c
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@ -26,6 +26,7 @@
#endif
#include "mbedtls/entropy.h"
#include "mbedtls/entropy_poll.h"
#include "mbedtls/hmac_drbg.h"
#include "mbedtls/ctr_drbg.h"
#include "mbedtls/dhm.h"
@ -100,6 +101,40 @@ static int run_test_snprintf( void )
test_snprintf( 5, "123", 3 ) != 0 );
}
/*
* Check if a seed file is present, and if not create one for the entropy
* self-test. If this fails, we attempt the test anyway, so no error is passed
* back.
*/
#if defined(MBEDTLS_ENTROPY_C) && defined(MBEDTLS_ENTROPY_NV_SEED) && \
!defined(MBEDTLS_NO_PLATFORM_ENTROPY)
static void create_entropy_seed_file( void )
{
int result;
size_t output_len = 0;
unsigned char seed_value[MBEDTLS_ENTROPY_BLOCK_SIZE];
/* Attempt to read the entropy seed file. If this fails - attempt to write
* to the file to ensure one is present. */
result = mbedtls_platform_std_nv_seed_read( seed_value,
MBEDTLS_ENTROPY_BLOCK_SIZE );
if( 0 == result )
return;
result = mbedtls_platform_entropy_poll( NULL,
seed_value,
MBEDTLS_ENTROPY_BLOCK_SIZE,
&output_len );
if( 0 != result )
return;
if( MBEDTLS_ENTROPY_BLOCK_SIZE != output_len )
return;
mbedtls_platform_std_nv_seed_write( seed_value, MBEDTLS_ENTROPY_BLOCK_SIZE );
}
#endif
int main( int argc, char *argv[] )
{
int v, suites_tested = 0, suites_failed = 0;
@ -331,6 +366,11 @@ int main( int argc, char *argv[] )
#endif
#if defined(MBEDTLS_ENTROPY_C)
#if defined(MBEDTLS_ENTROPY_NV_SEED) && !defined(MBEDTLS_NO_PLATFORM_ENTROPY)
create_entropy_seed_file();
#endif
if( mbedtls_entropy_self_test( v ) != 0 )
{
suites_failed++;