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mirror of https://github.com/trezor/trezor-firmware.git synced 2024-12-23 23:08:14 +00:00
trezor-firmware/embed/extmod/modtrezorconfig/modtrezorconfig.c
2017-07-28 16:23:45 +02:00

107 lines
3.4 KiB
C

/*
* Copyright (c) Pavol Rusnak, SatoshiLabs
*
* Licensed under TREZOR License
* see LICENSE file for details
*/
#include "py/runtime.h"
#if MICROPY_PY_TREZORCONFIG
#include <stdint.h>
#include <string.h>
#include "norcow.h"
static bool initialized = false;
/// def init() -> None:
/// '''
/// Initializes the storage. Must be called before any other method is called from this module!
/// '''
STATIC mp_obj_t mod_trezorconfig_init(void) {
bool r = norcow_init();
if (!r) {
mp_raise_msg(&mp_type_RuntimeError, "Could not initialize config module");
}
initialized = true;
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_0(mod_trezorconfig_init_obj, mod_trezorconfig_init);
/// def get(app: int, key: int) -> bytes:
/// '''
/// Gets a value of given key for given app (or empty bytes if not set).
/// '''
STATIC mp_obj_t mod_trezorconfig_get(mp_obj_t app, mp_obj_t key) {
if (!initialized) {
mp_raise_msg(&mp_type_RuntimeError, "Config module not initialized");
}
uint8_t a = mp_obj_get_int(app);
uint8_t k = mp_obj_get_int(key);
uint16_t appkey = a << 8 | k, len;
const void *val;
bool r = norcow_get(appkey, &val, &len);
if (!r || len == 0) {
return mp_const_empty_bytes;
}
vstr_t vstr;
vstr_init_len(&vstr, len);
memcpy(vstr.buf, val, len);
return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_trezorconfig_get_obj, mod_trezorconfig_get);
/// def set(app: int, key: int, value: bytes) -> None:
/// '''
/// Sets a value of given key for given app.
/// '''
STATIC mp_obj_t mod_trezorconfig_set(mp_obj_t app, mp_obj_t key, mp_obj_t value) {
if (!initialized) {
mp_raise_msg(&mp_type_RuntimeError, "Config module not initialized");
}
uint8_t a = mp_obj_get_int(app);
uint8_t k = mp_obj_get_int(key);
uint16_t appkey = a << 8 | k;
mp_buffer_info_t v;
mp_get_buffer_raise(value, &v, MP_BUFFER_READ);
bool r = norcow_set(appkey, v.buf, v.len);
if (!r) {
mp_raise_msg(&mp_type_RuntimeError, "Could not save value");
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_3(mod_trezorconfig_set_obj, mod_trezorconfig_set);
/// def wipe() -> None:
/// '''
/// Erases the whole config. Use with caution!
/// '''
STATIC mp_obj_t mod_trezorconfig_wipe(void) {
if (!initialized) {
mp_raise_msg(&mp_type_RuntimeError, "Config module not initialized");
}
bool r = norcow_wipe();
if (!r) {
mp_raise_msg(&mp_type_RuntimeError, "Could not wipe storage");
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_0(mod_trezorconfig_wipe_obj, mod_trezorconfig_wipe);
STATIC const mp_rom_map_elem_t mp_module_trezorconfig_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_trezorconfig) },
{ MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&mod_trezorconfig_init_obj) },
{ MP_ROM_QSTR(MP_QSTR_get), MP_ROM_PTR(&mod_trezorconfig_get_obj) },
{ MP_ROM_QSTR(MP_QSTR_set), MP_ROM_PTR(&mod_trezorconfig_set_obj) },
{ MP_ROM_QSTR(MP_QSTR_wipe), MP_ROM_PTR(&mod_trezorconfig_wipe_obj) },
};
STATIC MP_DEFINE_CONST_DICT(mp_module_trezorconfig_globals, mp_module_trezorconfig_globals_table);
const mp_obj_module_t mp_module_trezorconfig = {
.base = { &mp_type_module },
.globals = (mp_obj_dict_t*)&mp_module_trezorconfig_globals,
};
#endif // MICROPY_PY_TREZORCONFIG