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Change the way driver context structures are used

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Apparently there's a goal to make the PSA Crypto core free from
dynamic memory allocations. Therefore, all driver context structures
need to be known at compile time in order for the core to know their
final size.

This change defines & implements for hashing operations how the context
structures get defined.

Signed-off-by: Steven Cooreman <steven.cooreman@silabs.com>
This commit is contained in:
Steven Cooreman
2021-03-04 13:01:18 +01:00
parent 8e9e407fed
commit dbf8ceda54
6 changed files with 119 additions and 123 deletions
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61
library/psa_crypto.c
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@ -2196,30 +2196,42 @@ const mbedtls_md_info_t *mbedtls_md_info_from_psa( psa_algorithm_t alg )
psa_status_t psa_hash_abort( psa_hash_operation_t *operation )
{
if( operation != NULL )
return( psa_driver_wrapper_hash_abort( &operation->ctx ) );
else
return( PSA_ERROR_INVALID_ARGUMENT );
/* Aborting a non-active operation is allowed */
if( operation->id == 0 )
return( PSA_SUCCESS );
psa_status_t status = psa_driver_wrapper_hash_abort( operation );
operation->id = 0;
return( status );
}
psa_status_t psa_hash_setup( psa_hash_operation_t *operation,
psa_algorithm_t alg )
{
if( operation == NULL || !PSA_ALG_IS_HASH( alg ) )
/* A context must be freshly initialized before it can be set up. */
if( operation->id != 0 )
return( PSA_ERROR_BAD_STATE );
if( !PSA_ALG_IS_HASH( alg ) )
return( PSA_ERROR_INVALID_ARGUMENT );
return( psa_driver_wrapper_hash_setup( &operation->ctx, alg ) );
return( psa_driver_wrapper_hash_setup( operation, alg ) );
}
psa_status_t psa_hash_update( psa_hash_operation_t *operation,
const uint8_t *input,
size_t input_length )
{
if( operation == NULL )
return( PSA_ERROR_INVALID_ARGUMENT );
if( operation->id == 0 )
return( PSA_ERROR_BAD_STATE );
return( psa_driver_wrapper_hash_update( &operation->ctx,
input, input_length ) );
psa_status_t status = psa_driver_wrapper_hash_update( operation,
input, input_length );
if( status != PSA_SUCCESS )
psa_hash_abort( operation );
return( status );
}
psa_status_t psa_hash_finish( psa_hash_operation_t *operation,
@ -2227,12 +2239,11 @@ psa_status_t psa_hash_finish( psa_hash_operation_t *operation,
size_t hash_size,
size_t *hash_length )
{
if( operation == NULL )
return( PSA_ERROR_INVALID_ARGUMENT );
if( operation->id == 0 )
return( PSA_ERROR_BAD_STATE );
psa_status_t status = psa_driver_wrapper_hash_finish(
&operation->ctx,
hash, hash_size, hash_length );
operation, hash, hash_size, hash_length );
psa_hash_abort( operation );
return( status );
}
@ -2241,13 +2252,10 @@ psa_status_t psa_hash_verify( psa_hash_operation_t *operation,
const uint8_t *hash,
size_t hash_length )
{
if( operation == NULL )
return( PSA_ERROR_INVALID_ARGUMENT );
uint8_t actual_hash[MBEDTLS_MD_MAX_SIZE];
size_t actual_hash_length;
psa_status_t status = psa_driver_wrapper_hash_finish(
&operation->ctx,
psa_status_t status = psa_hash_finish(
operation,
actual_hash, sizeof( actual_hash ),
&actual_hash_length );
if( status != PSA_SUCCESS )
@ -2290,11 +2298,18 @@ psa_status_t psa_hash_compare( psa_algorithm_t alg,
psa_status_t psa_hash_clone( const psa_hash_operation_t *source_operation,
psa_hash_operation_t *target_operation )
{
if( source_operation == NULL || target_operation == NULL )
return( PSA_ERROR_INVALID_ARGUMENT );
if( source_operation->id == 0 ||
target_operation->id != 0 )
{
return( PSA_ERROR_BAD_STATE );
}
return( psa_driver_wrapper_hash_clone( &source_operation->ctx,
&target_operation->ctx ) );
psa_status_t status = psa_driver_wrapper_hash_clone( source_operation,
target_operation );
if( status != PSA_SUCCESS )
psa_hash_abort( target_operation );
return( status );
}