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SSL test programs: stuff RNG context into a struct

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Group the random generation context (entropy and DRBG) into a struct.
This is in preparation for unifying the common RNG-related code of
ssl_client2 and ssl_server2, then generalizing that code to support
methods other than entropy+CTR_DRBG.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine
2021-01-13 18:17:32 +01:00
parent 2427d15ea3
commit 8a8492bcd4
3 changed files with 31 additions and 25 deletions
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21
programs/ssl/ssl_client2.c
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@ -686,8 +686,7 @@ int main( int argc, char *argv[] )
#if defined(MBEDTLS_X509_CRT_PARSE_C)
mbedtls_x509_crt_profile crt_profile_for_test = mbedtls_x509_crt_profile_default;
#endif
mbedtls_entropy_context entropy;
mbedtls_ctr_drbg_context ctr_drbg;
rng_context_t rng;
mbedtls_ssl_context ssl;
mbedtls_ssl_config conf;
mbedtls_ssl_session saved_session;
@ -742,7 +741,7 @@ int main( int argc, char *argv[] )
mbedtls_ssl_init( &ssl );
mbedtls_ssl_config_init( &conf );
memset( &saved_session, 0, sizeof( mbedtls_ssl_session ) );
mbedtls_ctr_drbg_init( &ctr_drbg );
mbedtls_ctr_drbg_init( &rng.drbg );
#if defined(MBEDTLS_X509_CRT_PARSE_C)
mbedtls_x509_crt_init( &cacert );
mbedtls_x509_crt_init( &clicert );
@ -1534,12 +1533,12 @@ int main( int argc, char *argv[] )
mbedtls_printf( "\n . Seeding the random number generator..." );
fflush( stdout );
mbedtls_entropy_init( &entropy );
mbedtls_entropy_init( &rng.entropy );
if (opt.reproducible)
{
srand( 1 );
if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, dummy_entropy,
&entropy, (const unsigned char *) pers,
if( ( ret = mbedtls_ctr_drbg_seed( &rng.drbg, dummy_entropy,
&rng.entropy, (const unsigned char *) pers,
strlen( pers ) ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_seed returned -0x%x\n",
@ -1549,8 +1548,8 @@ int main( int argc, char *argv[] )
}
else
{
if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func,
&entropy, (const unsigned char *) pers,
if( ( ret = mbedtls_ctr_drbg_seed( &rng.drbg, mbedtls_entropy_func,
&rng.entropy, (const unsigned char *) pers,
strlen( pers ) ) ) != 0 )
{
mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_seed returned -0x%x\n",
@ -1904,7 +1903,7 @@ int main( int argc, char *argv[] )
#endif
#endif
}
mbedtls_ssl_conf_rng( &conf, mbedtls_ctr_drbg_random, &ctr_drbg );
mbedtls_ssl_conf_rng( &conf, mbedtls_ctr_drbg_random, &rng.drbg );
mbedtls_ssl_conf_dbg( &conf, my_debug, stdout );
mbedtls_ssl_conf_read_timeout( &conf, opt.read_timeout );
@ -3024,8 +3023,8 @@ exit:
mbedtls_ssl_session_free( &saved_session );
mbedtls_ssl_free( &ssl );
mbedtls_ssl_config_free( &conf );
mbedtls_ctr_drbg_free( &ctr_drbg );
mbedtls_entropy_free( &entropy );
mbedtls_ctr_drbg_free( &rng.drbg );
mbedtls_entropy_free( &rng.entropy );
if( session_data != NULL )
mbedtls_platform_zeroize( session_data, session_data_len );
mbedtls_free( session_data );