Commit b6a73c9b authored by Simon Butcher's avatar Simon Butcher

Add provision to create the entropy seedfile for selftest sample

In the selftest sample application, if no seedfile is present, one will be
created so the test can execute.
parent 6dc7c9c5
......@@ -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++;
......
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