mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-23 07:58:09 +00:00
85 lines
3.0 KiB
C
85 lines
3.0 KiB
C
/*
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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 "rand.h"
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typedef struct _mp_obj_Random_t {
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mp_obj_base_t base;
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} mp_obj_Random_t;
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STATIC mp_obj_t mod_TrezorCrypto_Random_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
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mp_arg_check_num(n_args, n_kw, 0, 0, false);
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mp_obj_Random_t *o = m_new_obj(mp_obj_Random_t);
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o->base.type = type;
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return MP_OBJ_FROM_PTR(o);
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}
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/// def trezor.crypto.random.uniform(n: int) -> int:
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/// '''
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/// Compute uniform random number from interval 0 ... n - 1
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/// '''
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STATIC mp_obj_t mod_TrezorCrypto_Random_uniform(mp_obj_t self, mp_obj_t n) {
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uint32_t nn = mp_obj_get_int_truncated(n);
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if (nn == 0) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Maximum can't be zero"));
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}
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return mp_obj_new_int_from_uint(random_uniform(nn));
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_TrezorCrypto_Random_uniform_obj, mod_TrezorCrypto_Random_uniform);
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/// def trezor.crypto.random.bytes(len: int) -> bytes:
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/// '''
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/// Generate random bytes sequence of length len
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/// '''
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STATIC mp_obj_t mod_TrezorCrypto_Random_bytes(mp_obj_t self, mp_obj_t len) {
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uint32_t l = mp_obj_get_int(len);
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vstr_t vstr;
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vstr_init_len(&vstr, l);
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random_buffer((uint8_t *)vstr.buf, l);
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return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_TrezorCrypto_Random_bytes_obj, mod_TrezorCrypto_Random_bytes);
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/// def trezor.crypto.random.shuffle(data: list) -> None:
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/// '''
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/// Shuffles items of given list (in-place)
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/// '''
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STATIC mp_obj_t mod_TrezorCrypto_Random_shuffle(mp_obj_t self, mp_obj_t data) {
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mp_uint_t item_cnt;
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mp_obj_t *items;
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if (MP_OBJ_IS_TYPE(data, &mp_type_list)) {
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mp_obj_list_get(data, &item_cnt, &items);
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} else {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "List expected"));
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}
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if (item_cnt > 256) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Maximum list size is 256 items"));
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}
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random_permute(items, sizeof(mp_obj_t *), item_cnt);
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_TrezorCrypto_Random_shuffle_obj, mod_TrezorCrypto_Random_shuffle);
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STATIC const mp_rom_map_elem_t mod_TrezorCrypto_Random_locals_dict_table[] = {
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{ MP_ROM_QSTR(MP_QSTR_uniform), MP_ROM_PTR(&mod_TrezorCrypto_Random_uniform_obj) },
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{ MP_ROM_QSTR(MP_QSTR_bytes), MP_ROM_PTR(&mod_TrezorCrypto_Random_bytes_obj) },
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{ MP_ROM_QSTR(MP_QSTR_shuffle), MP_ROM_PTR(&mod_TrezorCrypto_Random_shuffle_obj) },
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};
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STATIC MP_DEFINE_CONST_DICT(mod_TrezorCrypto_Random_locals_dict, mod_TrezorCrypto_Random_locals_dict_table);
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STATIC const mp_obj_type_t mod_TrezorCrypto_Random_type = {
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{ &mp_type_type },
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.name = MP_QSTR_Random,
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.make_new = mod_TrezorCrypto_Random_make_new,
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.locals_dict = (void*)&mod_TrezorCrypto_Random_locals_dict,
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};
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