mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-21 05:48:23 +00:00
87 lines
2.9 KiB
C
87 lines
2.9 KiB
C
/*
|
|
* Copyright (c) Pavol Rusnak, SatoshiLabs
|
|
*
|
|
* Licensed under TREZOR License
|
|
* see LICENSE file for details
|
|
*/
|
|
|
|
#include "py/objstr.h"
|
|
|
|
#include "rand.h"
|
|
|
|
/// class Random:
|
|
/// '''
|
|
/// '''
|
|
typedef struct _mp_obj_Random_t {
|
|
mp_obj_base_t base;
|
|
} mp_obj_Random_t;
|
|
|
|
/// def __init__(self) -> None:
|
|
/// '''
|
|
/// '''
|
|
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) {
|
|
mp_arg_check_num(n_args, n_kw, 0, 0, false);
|
|
mp_obj_Random_t *o = m_new_obj(mp_obj_Random_t);
|
|
o->base.type = type;
|
|
return MP_OBJ_FROM_PTR(o);
|
|
}
|
|
|
|
/// def uniform(self, n: int) -> int:
|
|
/// '''
|
|
/// Compute uniform random number from interval 0 ... n - 1
|
|
/// '''
|
|
STATIC mp_obj_t mod_TrezorCrypto_Random_uniform(mp_obj_t self, mp_obj_t n) {
|
|
uint32_t nn = mp_obj_get_int_truncated(n);
|
|
if (nn == 0) {
|
|
mp_raise_ValueError("Maximum can't be zero");
|
|
}
|
|
return mp_obj_new_int_from_uint(random_uniform(nn));
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_TrezorCrypto_Random_uniform_obj, mod_TrezorCrypto_Random_uniform);
|
|
|
|
/// def bytes(self, len: int) -> bytes:
|
|
/// '''
|
|
/// Generate random bytes sequence of length len
|
|
/// '''
|
|
STATIC mp_obj_t mod_TrezorCrypto_Random_bytes(mp_obj_t self, mp_obj_t len) {
|
|
uint32_t l = mp_obj_get_int(len);
|
|
if (l > 8192) {
|
|
mp_raise_ValueError("Maximum requested size is 8192");
|
|
}
|
|
vstr_t vstr;
|
|
vstr_init_len(&vstr, l);
|
|
random_buffer((uint8_t *)vstr.buf, l);
|
|
return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_TrezorCrypto_Random_bytes_obj, mod_TrezorCrypto_Random_bytes);
|
|
|
|
/// def shuffle(self, data: list) -> None:
|
|
/// '''
|
|
/// Shuffles items of given list (in-place)
|
|
/// '''
|
|
STATIC mp_obj_t mod_TrezorCrypto_Random_shuffle(mp_obj_t self, mp_obj_t data) {
|
|
size_t item_cnt;
|
|
mp_obj_t *items;
|
|
mp_obj_get_array(data, &item_cnt, &items);
|
|
if (item_cnt > 256) {
|
|
mp_raise_ValueError("Maximum list size is 256 items");
|
|
}
|
|
random_permute(items, sizeof(mp_obj_t *), item_cnt);
|
|
return mp_const_none;
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_TrezorCrypto_Random_shuffle_obj, mod_TrezorCrypto_Random_shuffle);
|
|
|
|
STATIC const mp_rom_map_elem_t mod_TrezorCrypto_Random_locals_dict_table[] = {
|
|
{ MP_ROM_QSTR(MP_QSTR_uniform), MP_ROM_PTR(&mod_TrezorCrypto_Random_uniform_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_bytes), MP_ROM_PTR(&mod_TrezorCrypto_Random_bytes_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_shuffle), MP_ROM_PTR(&mod_TrezorCrypto_Random_shuffle_obj) },
|
|
};
|
|
STATIC MP_DEFINE_CONST_DICT(mod_TrezorCrypto_Random_locals_dict, mod_TrezorCrypto_Random_locals_dict_table);
|
|
|
|
STATIC const mp_obj_type_t mod_TrezorCrypto_Random_type = {
|
|
{ &mp_type_type },
|
|
.name = MP_QSTR_Random,
|
|
.make_new = mod_TrezorCrypto_Random_make_new,
|
|
.locals_dict = (void*)&mod_TrezorCrypto_Random_locals_dict,
|
|
};
|