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https://github.com/trezor/trezor-firmware.git
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30 lines
1.1 KiB
C
30 lines
1.1 KiB
C
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/*
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* Copyright (c) Pavol Rusnak, SatoshiLabs
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*
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* Licensed under TREZOR License
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* see LICENSE file for details
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*/
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#include "py/objstr.h"
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#include "crc.h"
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mp_obj_t mod_trezorcrypto_crc_crc32(size_t n_args, const mp_obj_t *args) {
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mp_buffer_info_t bufinfo;
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mp_get_buffer_raise(args[0], &bufinfo, MP_BUFFER_READ);
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uint32_t crc = (n_args > 1) ? mp_obj_get_int_truncated(args[1]) : 0;
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crc = crc32(bufinfo.buf, bufinfo.len, crc ^ 0xffffffff);
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return mp_obj_new_int_from_uint(crc ^ 0xffffffff);
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}
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MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_trezorcrypto_crc_crc32_obj, 1, 2, mod_trezorcrypto_crc_crc32);
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STATIC const mp_rom_map_elem_t mod_trezorcrypto_crc_globals_table[] = {
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{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_crc) },
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{ MP_ROM_QSTR(MP_QSTR_crc32), MP_ROM_PTR(&mod_trezorcrypto_crc_crc32_obj) },
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};
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STATIC MP_DEFINE_CONST_DICT(mod_trezorcrypto_crc_globals, mod_trezorcrypto_crc_globals_table);
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STATIC const mp_obj_module_t mod_trezorcrypto_crc_module = {
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.base = { &mp_type_module },
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.globals = (mp_obj_dict_t*)&mod_trezorcrypto_crc_globals,
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};
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