68 lines
2.3 KiB
C
68 lines
2.3 KiB
C
// This file is part of the CircuitPython project: https://circuitpython.org
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//
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// SPDX-FileCopyrightText: Copyright (c) 2022 Scott Shawcroft for Adafruit Industries
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//
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// SPDX-License-Identifier: MIT
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#include <string.h>
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#include "py/obj.h"
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#include "py/mpconfig.h"
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#include "py/runtime.h"
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#include "shared-bindings/hashlib/__init__.h"
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#include "shared-bindings/hashlib/Hash.h"
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//| """Hashing related functions
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//|
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//| |see_cpython_module| :mod:`cpython:hashlib`.
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//| """
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//|
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//| def new(name: str, data: bytes = b"") -> hashlib.Hash:
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//| """Returns a Hash object setup for the named algorithm. Raises ValueError when the named
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//| algorithm is unsupported.
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//|
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//| :return: a hash object for the given algorithm
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//| :rtype: hashlib.Hash"""
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//| ...
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//|
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static mp_obj_t hashlib_new(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
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enum { ARG_name, ARG_data };
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static const mp_arg_t allowed_args[] = {
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{ MP_QSTR_name, MP_ARG_REQUIRED | MP_ARG_OBJ },
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{ MP_QSTR_data, MP_ARG_OBJ, {.u_obj = mp_const_none} },
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};
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mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
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mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
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const char *algorithm = mp_obj_str_get_str(args[ARG_name].u_obj);
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hashlib_hash_obj_t *self = mp_obj_malloc(hashlib_hash_obj_t, &hashlib_hash_type);
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if (!common_hal_hashlib_new(self, algorithm)) {
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mp_raise_ValueError(MP_ERROR_TEXT("Unsupported hash algorithm"));
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}
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if (args[ARG_data].u_obj != mp_const_none) {
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hashlib_hash_update(self, args[ARG_data].u_obj);
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}
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return self;
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}
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static MP_DEFINE_CONST_FUN_OBJ_KW(hashlib_new_obj, 1, hashlib_new);
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static const mp_rom_map_elem_t hashlib_module_globals_table[] = {
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{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_hashlib) },
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{ MP_ROM_QSTR(MP_QSTR_new), MP_ROM_PTR(&hashlib_new_obj) },
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// Hash is deliberately omitted here because CPython doesn't expose the
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// object on `hashlib` only the internal `_hashlib`.
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};
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static MP_DEFINE_CONST_DICT(hashlib_module_globals, hashlib_module_globals_table);
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const mp_obj_module_t hashlib_module = {
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.base = { &mp_type_module },
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.globals = (mp_obj_dict_t *)&hashlib_module_globals,
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};
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MP_REGISTER_MODULE(MP_QSTR_hashlib, hashlib_module);
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