circuitpython/shared-bindings/hashlib/Hash.c

98 lines
3.9 KiB
C

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2022 Scott Shawcroft for Adafruit Industries
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "shared-bindings/hashlib/Hash.h"
#include "py/obj.h"
#include "py/objproperty.h"
#include "py/objstr.h"
#include "py/runtime.h"
//| class Hash:
//| """In progress hash algorithm. This object is always created by a `hashlib.new()`. It has no
//| user-visible constructor."""
//|
//| digest_size: int
//| """Digest size in bytes"""
STATIC mp_obj_t hashlib_hash_digest_size_get(mp_obj_t self_in) {
mp_check_self(mp_obj_is_type(self_in, &hashlib_hash_type));
hashlib_hash_obj_t *self = MP_OBJ_TO_PTR(self_in);
return MP_OBJ_NEW_SMALL_INT(common_hal_hashlib_hash_get_digest_size(self));
}
MP_DEFINE_CONST_FUN_OBJ_1(hashlib_hash_digest_size_get_obj, hashlib_hash_digest_size_get);
MP_PROPERTY_GETTER(hashlib_hash_digest_size_obj, (mp_obj_t)&hashlib_hash_digest_size_get_obj);
//| def update(self, data: ReadableBuffer) -> None:
//| """Update the hash with the given bytes.
//|
//| :param ~circuitpython_typing.ReadableBuffer data: Update the hash from data in this buffer
//| """
//| ...
mp_obj_t hashlib_hash_update(mp_obj_t self_in, mp_obj_t buf_in) {
mp_check_self(mp_obj_is_type(self_in, &hashlib_hash_type));
hashlib_hash_obj_t *self = MP_OBJ_TO_PTR(self_in);
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(buf_in, &bufinfo, MP_BUFFER_READ);
common_hal_hashlib_hash_update(self, bufinfo.buf, bufinfo.len);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(hashlib_hash_update_obj, hashlib_hash_update);
//| def digest(self) -> bytes:
//| """Returns the current digest as bytes() with a length of `hashlib.Hash.digest_size`."""
//| ...
//|
STATIC mp_obj_t hashlib_hash_digest(mp_obj_t self_in) {
mp_check_self(mp_obj_is_type(self_in, &hashlib_hash_type));
hashlib_hash_obj_t *self = MP_OBJ_TO_PTR(self_in);
size_t size = common_hal_hashlib_hash_get_digest_size(self);
mp_obj_t obj = mp_obj_new_bytes_of_zeros(size);
mp_obj_str_t *o = MP_OBJ_TO_PTR(obj);
common_hal_hashlib_hash_digest(self, (uint8_t *)o->data, size);
return obj;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(hashlib_hash_digest_obj, hashlib_hash_digest);
STATIC const mp_rom_map_elem_t hashlib_hash_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_digest_size), MP_ROM_PTR(&hashlib_hash_digest_size_obj) },
{ MP_ROM_QSTR(MP_QSTR_update), MP_ROM_PTR(&hashlib_hash_update_obj) },
{ MP_ROM_QSTR(MP_QSTR_digest), MP_ROM_PTR(&hashlib_hash_digest_obj) },
};
STATIC MP_DEFINE_CONST_DICT(hashlib_hash_locals_dict, hashlib_hash_locals_dict_table);
MP_DEFINE_CONST_OBJ_TYPE(
hashlib_hash_type,
MP_QSTR_Hash,
MP_TYPE_FLAG_HAS_SPECIAL_ACCESSORS,
locals_dict, &hashlib_hash_locals_dict
);