mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-23 07:58:09 +00:00
91 lines
3.1 KiB
C
91 lines
3.1 KiB
C
/*
|
|
* Copyright (c) Pavol Rusnak, SatoshiLabs
|
|
*
|
|
* Licensed under TREZOR License
|
|
* see LICENSE file for details
|
|
*/
|
|
|
|
#include "py/objstr.h"
|
|
|
|
#include "sha2.h"
|
|
|
|
/// class Sha256:
|
|
/// '''
|
|
/// SHA256 context.
|
|
/// '''
|
|
typedef struct _mp_obj_Sha256_t {
|
|
mp_obj_base_t base;
|
|
SHA256_CTX ctx;
|
|
} mp_obj_Sha256_t;
|
|
|
|
STATIC mp_obj_t mod_trezorcrypto_Sha256_update(mp_obj_t self, mp_obj_t data);
|
|
|
|
/// def __init__(self, data: bytes = None) -> None:
|
|
/// '''
|
|
/// Creates a hash context object.
|
|
/// '''
|
|
STATIC mp_obj_t mod_trezorcrypto_Sha256_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, 1, false);
|
|
mp_obj_Sha256_t *o = m_new_obj(mp_obj_Sha256_t);
|
|
o->base.type = type;
|
|
sha256_Init(&(o->ctx));
|
|
// constructor called with bytes/str as first parameter
|
|
if (n_args == 1) {
|
|
mod_trezorcrypto_Sha256_update(MP_OBJ_FROM_PTR(o), args[0]);
|
|
}
|
|
return MP_OBJ_FROM_PTR(o);
|
|
}
|
|
|
|
/// def update(self, data: bytes) -> None:
|
|
/// '''
|
|
/// Update the hash context with hashed data.
|
|
/// '''
|
|
STATIC mp_obj_t mod_trezorcrypto_Sha256_update(mp_obj_t self, mp_obj_t data) {
|
|
mp_obj_Sha256_t *o = MP_OBJ_TO_PTR(self);
|
|
mp_buffer_info_t msg;
|
|
mp_get_buffer_raise(data, &msg, MP_BUFFER_READ);
|
|
if (msg.len > 0) {
|
|
sha256_Update(&(o->ctx), msg.buf, msg.len);
|
|
}
|
|
return mp_const_none;
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_trezorcrypto_Sha256_update_obj, mod_trezorcrypto_Sha256_update);
|
|
|
|
/// def digest(self) -> bytes:
|
|
/// '''
|
|
/// Returns the digest of hashed data.
|
|
/// '''
|
|
STATIC mp_obj_t mod_trezorcrypto_Sha256_digest(mp_obj_t self) {
|
|
mp_obj_Sha256_t *o = MP_OBJ_TO_PTR(self);
|
|
uint8_t out[SHA256_DIGEST_LENGTH];
|
|
SHA256_CTX ctx;
|
|
memcpy(&ctx, &(o->ctx), sizeof(SHA256_CTX));
|
|
sha256_Final(&ctx, out);
|
|
memset(&ctx, 0, sizeof(SHA256_CTX));
|
|
return mp_obj_new_bytes(out, sizeof(out));
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_trezorcrypto_Sha256_digest_obj, mod_trezorcrypto_Sha256_digest);
|
|
|
|
STATIC mp_obj_t mod_trezorcrypto_Sha256___del__(mp_obj_t self) {
|
|
mp_obj_Sha256_t *o = MP_OBJ_TO_PTR(self);
|
|
memset(&(o->ctx), 0, sizeof(SHA256_CTX));
|
|
return mp_const_none;
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_trezorcrypto_Sha256___del___obj, mod_trezorcrypto_Sha256___del__);
|
|
|
|
STATIC const mp_rom_map_elem_t mod_trezorcrypto_Sha256_locals_dict_table[] = {
|
|
{ MP_ROM_QSTR(MP_QSTR_update), MP_ROM_PTR(&mod_trezorcrypto_Sha256_update_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_digest), MP_ROM_PTR(&mod_trezorcrypto_Sha256_digest_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&mod_trezorcrypto_Sha256___del___obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_block_size), MP_OBJ_NEW_SMALL_INT(SHA256_BLOCK_LENGTH) },
|
|
{ MP_ROM_QSTR(MP_QSTR_digest_size), MP_OBJ_NEW_SMALL_INT(SHA256_DIGEST_LENGTH) },
|
|
};
|
|
STATIC MP_DEFINE_CONST_DICT(mod_trezorcrypto_Sha256_locals_dict, mod_trezorcrypto_Sha256_locals_dict_table);
|
|
|
|
STATIC const mp_obj_type_t mod_trezorcrypto_Sha256_type = {
|
|
{ &mp_type_type },
|
|
.name = MP_QSTR_Sha256,
|
|
.make_new = mod_trezorcrypto_Sha256_make_new,
|
|
.locals_dict = (void*)&mod_trezorcrypto_Sha256_locals_dict,
|
|
};
|