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Rework psa_copy_key_material

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There's no need for calling export-and-import when the key is
guaranteed to have been stored in export representation.

Signed-off-by: Steven Cooreman <steven.cooreman@silabs.com>
This commit is contained in:
Steven Cooreman 2020-10-13 14:35:45 +02:00
parent 01fc209969
commit 398aee5742
1 changed files with 8 additions and 18 deletions
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26
library/psa_crypto.c
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@ -2179,26 +2179,16 @@ exit:
static psa_status_t psa_copy_key_material( const psa_key_slot_t *source, static psa_status_t psa_copy_key_material( const psa_key_slot_t *source,
psa_key_slot_t *target ) psa_key_slot_t *target )
{ {
psa_status_t status; psa_status_t status = psa_allocate_buffer_to_slot( target,
uint8_t *buffer = NULL; source->data.key.bytes );
size_t buffer_size = 0;
size_t length;
buffer_size = PSA_KEY_EXPORT_MAX_SIZE( source->attr.type,
psa_get_key_slot_bits( source ) );
buffer = mbedtls_calloc( 1, buffer_size );
if( buffer == NULL )
return( PSA_ERROR_INSUFFICIENT_MEMORY );
status = psa_internal_export_key( source, buffer, buffer_size, &length, 0 );
if( status != PSA_SUCCESS ) if( status != PSA_SUCCESS )
goto exit;
target->attr.type = source->attr.type;
status = psa_import_key_into_slot( target, buffer, length );
exit:
mbedtls_platform_zeroize( buffer, buffer_size );
mbedtls_free( buffer );
return( status ); return( status );
memcpy( target->data.key.data, source->data.key.data, source->data.key.bytes );
target->attr.type = source->attr.type;
target->attr.bits = source->attr.bits;
return( PSA_SUCCESS );
} }
psa_status_t psa_copy_key( psa_key_handle_t source_handle, psa_status_t psa_copy_key( psa_key_handle_t source_handle,