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1801740a7c
mbedtls/tests/suites/test_suite_psa_crypto_se_driver_hal.function
Gilles Peskine 1801740a7c SE driver: report the bit size on key import 
Add a parameter to the key import method of a secure element driver to
make it report the key size in bits. This is necessary (otherwise the
core has no idea what the bit-size is), and making import report it is
easier than adding a separate method (for other key creation methods,
this information is an input, not an output).
2019-07-29 18:07:09 +02:00

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/* BEGIN_HEADER */
#include "psa_crypto_helpers.h"
#include "psa/crypto_se_driver.h"
#include "psa_crypto_se.h"
#include "psa_crypto_storage.h"
/****************************************************************/
/* Test driver helpers */
/****************************************************************/
/** The minimum valid lifetime value for a secure element driver. */
#define MIN_DRIVER_LIFETIME 2
/** The driver detected a condition that shouldn't happen.
* This is probably a bug in the library. */
#define PSA_ERROR_DETECTED_BY_DRIVER ((psa_status_t)( -500 ))
/** Like #TEST_ASSERT for use in a driver method.
*
* Use this macro to assert on guarantees provided by the core.
*/
#define DRIVER_ASSERT( TEST ) \
do { \
if( ! (TEST) ) \
{ \
test_fail( #TEST, __LINE__, __FILE__ ); \
return( PSA_ERROR_DETECTED_BY_DRIVER ); \
} \
} while( 0 )
/****************************************************************/
/* Miscellaneous driver methods */
/****************************************************************/
/* Allocate slot numbers with a monotonic counter. */
static psa_status_t counter_allocate( psa_drv_se_context_t *context,
void *persistent_data,
const psa_key_attributes_t *attributes,
psa_key_slot_number_t *slot_number )
{
psa_key_slot_number_t *p_counter = persistent_data;
(void) attributes;
if( context->persistent_data_size != sizeof( psa_key_slot_number_t ) )
return( PSA_ERROR_DETECTED_BY_DRIVER );
++*p_counter;
if( *p_counter == 0 )
return( PSA_ERROR_INSUFFICIENT_STORAGE );
*slot_number = *p_counter;
return( PSA_SUCCESS );
}
/* Null import: do nothing, but pretend it worked. */
static psa_status_t null_import( psa_drv_se_context_t *context,
psa_key_slot_number_t slot_number,
psa_key_lifetime_t lifetime,
psa_key_type_t type,
psa_algorithm_t algorithm,
psa_key_usage_t usage,
const uint8_t *p_data,
size_t data_length,
size_t *bits )
{
(void) context;
(void) slot_number;
(void) lifetime;
(void) type;
(void) algorithm;
(void) usage;
(void) p_data;
/* We're supposed to return a key size. Return one that's correct for
* plain data keys. */
*bits = PSA_BYTES_TO_BITS( data_length );
return( PSA_SUCCESS );
}
/****************************************************************/
/* RAM-based test driver */
/****************************************************************/
#define RAM_MAX_KEY_SIZE 64
typedef struct
{
psa_key_lifetime_t lifetime;
psa_key_type_t type;
size_t bits;
uint8_t content[RAM_MAX_KEY_SIZE];
} ram_slot_t;
static ram_slot_t ram_slots[16];
/* A type with at least ARRAY_LENGTH(ram_slots) bits, containing a
* bit vector indicating which slots are in use. */
typedef uint16_t ram_slot_usage_t;
static uint8_t ram_min_slot = 0;
static void ram_slots_reset( void )
{
memset( ram_slots, 0, sizeof( ram_slots ) );
ram_min_slot = 0;
}
static psa_status_t ram_import( psa_drv_se_context_t *context,
psa_key_slot_number_t slot_number,
psa_key_lifetime_t lifetime,
psa_key_type_t type,
psa_algorithm_t algorithm,
psa_key_usage_t usage,
const uint8_t *p_data,
size_t data_length,
size_t *bits )
{
(void) context;
DRIVER_ASSERT( slot_number < ARRAY_LENGTH( ram_slots ) );
if( data_length > sizeof( ram_slots[slot_number].content ) )
return( PSA_ERROR_INSUFFICIENT_STORAGE );
ram_slots[slot_number].lifetime = lifetime;
ram_slots[slot_number].type = type;
ram_slots[slot_number].bits = PSA_BYTES_TO_BITS( data_length );
*bits = PSA_BYTES_TO_BITS( data_length );
(void) algorithm;
(void) usage;
memcpy( ram_slots[slot_number].content, p_data, data_length );
return( PSA_SUCCESS );
}
static psa_status_t ram_export( psa_drv_se_context_t *context,
psa_key_slot_number_t slot_number,
uint8_t *p_data,
size_t data_size,
size_t *p_data_length )
{
size_t actual_size;
(void) context;
DRIVER_ASSERT( slot_number < ARRAY_LENGTH( ram_slots ) );
actual_size = PSA_BITS_TO_BYTES( ram_slots[slot_number].bits );
if( actual_size > data_size )
return( PSA_ERROR_BUFFER_TOO_SMALL );
*p_data_length = actual_size;
memcpy( p_data, ram_slots[slot_number].content, actual_size );
return( PSA_SUCCESS );
}
static psa_status_t ram_destroy( psa_drv_se_context_t *context,
void *persistent_data,
psa_key_slot_number_t slot_number )
{
ram_slot_usage_t *slot_usage = persistent_data;
DRIVER_ASSERT( context->persistent_data_size == sizeof( ram_slot_usage_t ) );
DRIVER_ASSERT( slot_number < ARRAY_LENGTH( ram_slots ) );
memset( &ram_slots[slot_number], 0, sizeof( ram_slots[slot_number] ) );
*slot_usage &= ~(ram_slot_usage_t)( 1 << slot_number );
return( PSA_SUCCESS );
}
static psa_status_t ram_allocate( psa_drv_se_context_t *context,
void *persistent_data,
const psa_key_attributes_t *attributes,
psa_key_slot_number_t *slot_number )
{
ram_slot_usage_t *slot_usage = persistent_data;
(void) attributes;
DRIVER_ASSERT( context->persistent_data_size == sizeof( ram_slot_usage_t ) );
for( *slot_number = ram_min_slot;
*slot_number < ARRAY_LENGTH( ram_slots );
++( *slot_number ) )
{
if( ! ( *slot_usage & 1 << *slot_number ) )
return( PSA_SUCCESS );
}
return( PSA_ERROR_INSUFFICIENT_STORAGE );
}
/****************************************************************/
/* Other test helper functions */
/****************************************************************/
/* Check that the attributes of a key reported by psa_get_key_attributes()
* are consistent with the attributes used when creating the key. */
static int check_key_attributes(
psa_key_handle_t handle,
const psa_key_attributes_t *reference_attributes )
{
int ok = 0;
psa_key_attributes_t actual_attributes = PSA_KEY_ATTRIBUTES_INIT;
PSA_ASSERT( psa_get_key_attributes( handle, &actual_attributes ) );
TEST_EQUAL( psa_get_key_id( &actual_attributes ),
psa_get_key_id( reference_attributes ) );
TEST_EQUAL( psa_get_key_lifetime( &actual_attributes ),
psa_get_key_lifetime( reference_attributes ) );
TEST_EQUAL( psa_get_key_type( &actual_attributes ),
psa_get_key_type( reference_attributes ) );
TEST_EQUAL( psa_get_key_usage_flags( &actual_attributes ),
psa_get_key_usage_flags( reference_attributes ) );
TEST_EQUAL( psa_get_key_algorithm( &actual_attributes ),
psa_get_key_algorithm( reference_attributes ) );
TEST_EQUAL( psa_get_key_enrollment_algorithm( &actual_attributes ),
psa_get_key_enrollment_algorithm( reference_attributes ) );
if( psa_get_key_bits( reference_attributes ) != 0 )
{
TEST_EQUAL( psa_get_key_bits( &actual_attributes ),
psa_get_key_bits( reference_attributes ) );
}
ok = 1;
exit:
return( ok );
}
/* Check that a function's return status is "smoke-free", i.e. that
* it's an acceptable error code when calling an API function that operates
* on a key with potentially bogus parameters. */
static int is_status_smoke_free( psa_status_t status )
{
switch( status )
{
case PSA_SUCCESS:
case PSA_ERROR_NOT_SUPPORTED:
case PSA_ERROR_NOT_PERMITTED:
case PSA_ERROR_BUFFER_TOO_SMALL:
case PSA_ERROR_INVALID_ARGUMENT:
case PSA_ERROR_INVALID_SIGNATURE:
case PSA_ERROR_INVALID_PADDING:
return( 1 );
default:
return( 0 );
}
}
#define SMOKE_ASSERT( expr ) \
TEST_ASSERT( is_status_smoke_free( expr ) )
/* Smoke test a key. There are mostly no wrong answers here since we pass
* mostly bogus parameters: the goal is to ensure that there is no memory
* corruption or crash. This test function is most useful when run under
* an environment with sanity checks such as ASan or MSan. */
static int smoke_test_key( psa_key_handle_t handle )
{
int ok = 0;
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
psa_mac_operation_t mac_operation = PSA_MAC_OPERATION_INIT;
psa_cipher_operation_t cipher_operation = PSA_CIPHER_OPERATION_INIT;
psa_key_derivation_operation_t derivation_operation =
PSA_KEY_DERIVATION_OPERATION_INIT;
uint8_t buffer[80]; /* large enough for a public key for ECDH */
size_t length;
psa_key_handle_t handle2 = 0;
SMOKE_ASSERT( psa_get_key_attributes( handle, &attributes ) );
SMOKE_ASSERT( psa_export_key( handle,
buffer, sizeof( buffer ), &length ) );
SMOKE_ASSERT( psa_export_public_key( handle,
buffer, sizeof( buffer ), &length ) );
SMOKE_ASSERT( psa_copy_key( handle, &attributes, &handle2 ) );
if( handle2 != 0 )
PSA_ASSERT( psa_close_key( handle2 ) );
SMOKE_ASSERT( psa_mac_sign_setup( &mac_operation, handle, PSA_ALG_CMAC ) );
PSA_ASSERT( psa_mac_abort( &mac_operation ) );
SMOKE_ASSERT( psa_mac_verify_setup( &mac_operation, handle,
PSA_ALG_HMAC( PSA_ALG_SHA_256 ) ) );
PSA_ASSERT( psa_mac_abort( &mac_operation ) );
SMOKE_ASSERT( psa_cipher_encrypt_setup( &cipher_operation, handle,
PSA_ALG_CTR ) );
PSA_ASSERT( psa_cipher_abort( &cipher_operation ) );
SMOKE_ASSERT( psa_cipher_decrypt_setup( &cipher_operation, handle,
PSA_ALG_CTR ) );
PSA_ASSERT( psa_cipher_abort( &cipher_operation ) );
SMOKE_ASSERT( psa_aead_encrypt( handle, PSA_ALG_CCM,
buffer, sizeof( buffer ),
NULL, 0,
buffer, sizeof( buffer),
buffer, sizeof( buffer), &length ) );
SMOKE_ASSERT( psa_aead_decrypt( handle, PSA_ALG_CCM,
buffer, sizeof( buffer ),
NULL, 0,
buffer, sizeof( buffer),
buffer, sizeof( buffer), &length ) );
SMOKE_ASSERT( psa_asymmetric_sign( handle, PSA_ALG_ECDSA_ANY,
buffer, 32,
buffer, sizeof( buffer ), &length ) );
SMOKE_ASSERT( psa_asymmetric_verify( handle, PSA_ALG_ECDSA_ANY,
buffer, 32,
buffer, sizeof( buffer ) ) );
SMOKE_ASSERT( psa_asymmetric_encrypt( handle, PSA_ALG_RSA_PKCS1V15_CRYPT,
buffer, 10, NULL, 0,
buffer, sizeof( buffer ), &length ) );
SMOKE_ASSERT( psa_asymmetric_decrypt( handle, PSA_ALG_RSA_PKCS1V15_CRYPT,
buffer, sizeof( buffer ), NULL, 0,
buffer, sizeof( buffer ), &length ) );
#if defined(MBEDTLS_SHA256_C)
/* Try the key in a plain key derivation. */
PSA_ASSERT( psa_key_derivation_setup( &derivation_operation,
PSA_ALG_HKDF( PSA_ALG_SHA_256 ) ) );
PSA_ASSERT( psa_key_derivation_input_bytes( &derivation_operation,
PSA_KEY_DERIVATION_INPUT_SALT,
NULL, 0 ) );
SMOKE_ASSERT( psa_key_derivation_input_key( &derivation_operation,
PSA_KEY_DERIVATION_INPUT_SECRET,
handle ) );
PSA_ASSERT( psa_key_derivation_abort( &derivation_operation ) );
/* If the key is asymmetric, try it in a key agreement, both as
* part of a derivation operation and standalone. */
if( psa_export_public_key( handle, buffer, sizeof( buffer ), &length ) ==
PSA_SUCCESS )
{
psa_algorithm_t alg =
PSA_ALG_KEY_AGREEMENT( PSA_ALG_ECDH,
PSA_ALG_HKDF( PSA_ALG_SHA_256 ) );
PSA_ASSERT( psa_key_derivation_setup( &derivation_operation, alg ) );
PSA_ASSERT( psa_key_derivation_input_bytes(
&derivation_operation, PSA_KEY_DERIVATION_INPUT_SALT,
NULL, 0 ) );
SMOKE_ASSERT( psa_key_derivation_key_agreement(
&derivation_operation,
PSA_KEY_DERIVATION_INPUT_SECRET,
handle, buffer, length ) );
PSA_ASSERT( psa_key_derivation_abort( &derivation_operation ) );
SMOKE_ASSERT( psa_raw_key_agreement(
alg, handle, buffer, length,
buffer, sizeof( buffer ), &length ) );
}
#endif /* MBEDTLS_SHA256_C */
ok = 1;
exit:
psa_reset_key_attributes( &attributes );
return( ok );
}
#define MAX_KEY_ID_FOR_TEST 10
static void psa_purge_storage( void )
{
psa_key_id_t id;
psa_key_lifetime_t lifetime;
/* The tests may have potentially created key ids from 1 to
* MAX_KEY_ID_FOR_TEST. In addition, run the destroy function on key id
* 0, which file-based storage uses as a temporary file. */
for( id = 0; id <= MAX_KEY_ID_FOR_TEST; id++ )
psa_destroy_persistent_key( id );
/* Purge the transaction file. */
psa_crypto_stop_transaction( );
/* Purge driver persistent data. */
for( lifetime = 0; lifetime < PSA_MAX_SE_LIFETIME; lifetime++ )
psa_destroy_se_persistent_data( lifetime );
}
/* END_HEADER */
/* BEGIN_DEPENDENCIES
* depends_on:MBEDTLS_PSA_CRYPTO_SE_C
* END_DEPENDENCIES
*/
/* BEGIN_CASE */
void register_one( int lifetime, int version, int expected_status_arg )
{
psa_status_t expected_status = expected_status_arg;
psa_drv_se_t driver;
memset( &driver, 0, sizeof( driver ) );
driver.hal_version = version;
TEST_EQUAL( psa_register_se_driver( lifetime, &driver ),
expected_status );
PSA_ASSERT( psa_crypto_init( ) );
exit:
PSA_DONE( );
}
/* END_CASE */
/* BEGIN_CASE */
void register_twice( int count )
{
psa_drv_se_t driver;
psa_key_lifetime_t lifetime;
psa_key_lifetime_t max = MIN_DRIVER_LIFETIME + count;
memset( &driver, 0, sizeof( driver ) );
driver.hal_version = PSA_DRV_SE_HAL_VERSION;
for( lifetime = MIN_DRIVER_LIFETIME; lifetime < max; lifetime++ )
PSA_ASSERT( psa_register_se_driver( lifetime, &driver ) );
for( lifetime = MIN_DRIVER_LIFETIME; lifetime < max; lifetime++ )
TEST_EQUAL( psa_register_se_driver( lifetime, &driver ),
PSA_ERROR_ALREADY_EXISTS );
PSA_ASSERT( psa_crypto_init( ) );
exit:
PSA_DONE( );
}
/* END_CASE */
/* BEGIN_CASE */
void register_max( )
{
psa_drv_se_t driver;
psa_key_lifetime_t lifetime;
psa_key_lifetime_t max = MIN_DRIVER_LIFETIME + PSA_MAX_SE_DRIVERS;
memset( &driver, 0, sizeof( driver ) );
driver.hal_version = PSA_DRV_SE_HAL_VERSION;
for( lifetime = MIN_DRIVER_LIFETIME; lifetime < max; lifetime++ )
PSA_ASSERT( psa_register_se_driver( lifetime, &driver ) );
TEST_EQUAL( psa_register_se_driver( lifetime, &driver ),
PSA_ERROR_INSUFFICIENT_MEMORY );
PSA_ASSERT( psa_crypto_init( ) );
exit:
PSA_DONE( );
}
/* END_CASE */
/* BEGIN_CASE */
void key_creation_import_export( int min_slot, int restart )
{
psa_drv_se_t driver;
psa_drv_se_key_management_t key_management;
psa_key_lifetime_t lifetime = 2;
psa_key_id_t id = 1;
psa_key_handle_t handle = 0;
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
const uint8_t key_material[3] = {0xfa, 0xca, 0xde};
uint8_t exported[sizeof( key_material )];
size_t exported_length;
memset( &driver, 0, sizeof( driver ) );
memset( &key_management, 0, sizeof( key_management ) );
driver.hal_version = PSA_DRV_SE_HAL_VERSION;
driver.key_management = &key_management;
driver.persistent_data_size = sizeof( ram_slot_usage_t );
key_management.p_allocate = ram_allocate;
key_management.p_import = ram_import;
key_management.p_destroy = ram_destroy;
key_management.p_export = ram_export;
ram_min_slot = min_slot;
PSA_ASSERT( psa_register_se_driver( lifetime, &driver ) );
PSA_ASSERT( psa_crypto_init( ) );
/* Create a key. */
psa_set_key_id( &attributes, id );
psa_set_key_lifetime( &attributes, lifetime );
psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_EXPORT );
psa_set_key_type( &attributes, PSA_KEY_TYPE_RAW_DATA );
PSA_ASSERT( psa_import_key( &attributes,
key_material, sizeof( key_material ),
&handle ) );
/* Maybe restart, to check that the information is saved correctly. */
if( restart )
{
mbedtls_psa_crypto_free( );
PSA_ASSERT( psa_register_se_driver( lifetime, &driver ) );
PSA_ASSERT( psa_crypto_init( ) );
PSA_ASSERT( psa_open_key( id, &handle ) );
}
/* Test that the key was created in the expected slot. */
TEST_ASSERT( ram_slots[min_slot].type == PSA_KEY_TYPE_RAW_DATA );
/* Test the key attributes and the key data. */
if( ! check_key_attributes( handle, &attributes ) )
goto exit;
PSA_ASSERT( psa_export_key( handle,
exported, sizeof( exported ),
&exported_length ) );
ASSERT_COMPARE( key_material, sizeof( key_material ),
exported, exported_length );
PSA_ASSERT( psa_destroy_key( handle ) );
/* Test that the key has been erased from the designated slot. */
TEST_ASSERT( ram_slots[min_slot].type == 0 );
exit:
PSA_DONE( );
ram_slots_reset( );
psa_purge_storage( );
}
/* END_CASE */
/* BEGIN_CASE */
void key_creation_smoke( int type_arg, int alg_arg,
data_t *key_material )
{
psa_key_type_t type = type_arg;
psa_algorithm_t alg = alg_arg;
psa_drv_se_t driver;
psa_drv_se_key_management_t key_management;
psa_key_lifetime_t lifetime = 2;
psa_key_id_t id = 1;
psa_key_handle_t handle = 0;
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
memset( &driver, 0, sizeof( driver ) );
memset( &key_management, 0, sizeof( key_management ) );
driver.hal_version = PSA_DRV_SE_HAL_VERSION;
driver.key_management = &key_management;
driver.persistent_data_size = sizeof( psa_key_slot_number_t );
key_management.p_allocate = counter_allocate;
key_management.p_import = null_import;
PSA_ASSERT( psa_register_se_driver( lifetime, &driver ) );
PSA_ASSERT( psa_crypto_init( ) );
/* Create a key. */
psa_set_key_id( &attributes, id );
psa_set_key_lifetime( &attributes, lifetime );
psa_set_key_usage_flags( &attributes,
PSA_KEY_USAGE_SIGN | PSA_KEY_USAGE_VERIFY |
PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT |
PSA_KEY_USAGE_EXPORT );
psa_set_key_algorithm( &attributes, alg );
psa_set_key_type( &attributes, type );
PSA_ASSERT( psa_import_key( &attributes,
key_material->x, key_material->len,
&handle ) );
/* Do stuff with the key. */
if( ! smoke_test_key( handle ) )
goto exit;
/* Restart and try again. */
mbedtls_psa_crypto_free( );
PSA_ASSERT( psa_register_se_driver( lifetime, &driver ) );
PSA_ASSERT( psa_crypto_init( ) );
PSA_ASSERT( psa_open_key( id, &handle ) );
if( ! smoke_test_key( handle ) )
goto exit;
/* We're done. */
PSA_ASSERT( psa_destroy_key( handle ) );
exit:
PSA_DONE( );
ram_slots_reset( );
psa_purge_storage( );
}
/* END_CASE */
/* BEGIN_CASE */
void generate_key_not_supported( int type_arg, int bits_arg )
{
psa_key_type_t type = type_arg;
size_t bits = bits_arg;
psa_drv_se_t driver;
psa_drv_se_key_management_t key_management;
psa_key_lifetime_t lifetime = 2;
psa_key_id_t id = 1;
psa_key_handle_t handle = 0;
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
memset( &driver, 0, sizeof( driver ) );
memset( &key_management, 0, sizeof( key_management ) );
driver.hal_version = PSA_DRV_SE_HAL_VERSION;
driver.key_management = &key_management;
driver.persistent_data_size = sizeof( psa_key_slot_number_t );
key_management.p_allocate = counter_allocate;
PSA_ASSERT( psa_register_se_driver( lifetime, &driver ) );
PSA_ASSERT( psa_crypto_init( ) );
psa_set_key_id( &attributes, id );
psa_set_key_lifetime( &attributes, lifetime );
psa_set_key_type( &attributes, type );
psa_set_key_bits( &attributes, bits );
TEST_EQUAL( psa_generate_key( &attributes, &handle ),
PSA_ERROR_NOT_SUPPORTED );
exit:
PSA_DONE( );
ram_slots_reset( );
psa_purge_storage( );
}
/* END_CASE */
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