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158 lines
5.5 KiB
158 lines
5.5 KiB
/*
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* This file is part of the Trezor project, https://trezor.io/
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*
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* Copyright (c) SatoshiLabs
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "py/objstr.h"
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#include "memzero.h"
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#include "sha3.h"
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/// package: trezorcrypto.__init__
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/// class sha3_256:
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/// """
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/// SHA3_256 context.
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/// """
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/// block_size: int
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/// digest_size: int
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typedef struct _mp_obj_Sha3_256_t {
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mp_obj_base_t base;
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SHA3_CTX ctx;
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bool keccak;
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} mp_obj_Sha3_256_t;
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STATIC mp_obj_t mod_trezorcrypto_Sha3_256_update(mp_obj_t self, mp_obj_t data);
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/// def __init__(
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/// self,
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/// data: bytes | None = None,
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/// keccak: bool = False,
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/// ) -> None:
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/// """
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/// Creates a hash context object.
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/// """
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STATIC mp_obj_t mod_trezorcrypto_Sha3_256_make_new(const mp_obj_type_t *type,
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size_t n_args, size_t n_kw,
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const mp_obj_t *args) {
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mp_arg_check_num(n_args, n_kw, 0, 1, true);
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mp_obj_Sha3_256_t *o = m_new_obj_with_finaliser(mp_obj_Sha3_256_t);
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o->base.type = type;
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o->keccak = 0;
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sha3_256_Init(&(o->ctx));
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STATIC const mp_arg_t allowed_args[] = {
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{MP_QSTR_data, MP_ARG_OBJ, {.u_obj = mp_const_none}},
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{MP_QSTR_keccak, MP_ARG_OBJ | MP_ARG_KW_ONLY, {.u_obj = MP_OBJ_NULL}},
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};
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mp_arg_val_t vals[MP_ARRAY_SIZE(allowed_args)] = {0};
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mp_arg_parse_all_kw_array(n_args, n_kw, args, MP_ARRAY_SIZE(allowed_args),
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allowed_args, vals);
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if (vals[1].u_obj != MP_OBJ_NULL) {
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o->keccak = mp_obj_is_true(vals[1].u_obj);
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}
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if (vals[0].u_obj != mp_const_none) {
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mod_trezorcrypto_Sha3_256_update(MP_OBJ_FROM_PTR(o), vals[0].u_obj);
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}
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return MP_OBJ_FROM_PTR(o);
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}
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/// def update(self, data: bytes) -> None:
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/// """
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/// Update the hash context with hashed data.
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/// """
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STATIC mp_obj_t mod_trezorcrypto_Sha3_256_update(mp_obj_t self, mp_obj_t data) {
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mp_obj_Sha3_256_t *o = MP_OBJ_TO_PTR(self);
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mp_buffer_info_t msg = {0};
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mp_get_buffer_raise(data, &msg, MP_BUFFER_READ);
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if (msg.len > 0) {
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sha3_Update(&(o->ctx), msg.buf, msg.len);
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}
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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_Sha3_256_update_obj,
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mod_trezorcrypto_Sha3_256_update);
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/// def digest(self) -> bytes:
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/// """
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/// Returns the digest of hashed data.
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/// """
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STATIC mp_obj_t mod_trezorcrypto_Sha3_256_digest(mp_obj_t self) {
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mp_obj_Sha3_256_t *o = MP_OBJ_TO_PTR(self);
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vstr_t hash = {0};
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vstr_init_len(&hash, SHA3_256_DIGEST_LENGTH);
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SHA3_CTX ctx = {0};
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memcpy(&ctx, &(o->ctx), sizeof(SHA3_CTX));
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if (o->keccak) {
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keccak_Final(&ctx, (uint8_t *)hash.buf);
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} else {
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sha3_Final(&ctx, (uint8_t *)hash.buf);
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}
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memzero(&ctx, sizeof(SHA3_CTX));
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return mp_obj_new_str_from_vstr(&mp_type_bytes, &hash);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_trezorcrypto_Sha3_256_digest_obj,
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mod_trezorcrypto_Sha3_256_digest);
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/// def copy(self) -> sha3_256:
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/// """
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/// Returns the copy of the digest object with the current state
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/// """
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STATIC mp_obj_t mod_trezorcrypto_Sha3_256_copy(size_t n_args,
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const mp_obj_t *args) {
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mp_obj_Sha3_256_t *o = MP_OBJ_TO_PTR(args[0]);
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mp_obj_Sha3_256_t *out = m_new_obj_with_finaliser(mp_obj_Sha3_256_t);
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out->base.type = o->base.type;
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out->keccak = o->keccak;
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memcpy(&(out->ctx), &(o->ctx), sizeof(SHA3_CTX));
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return MP_OBJ_FROM_PTR(out);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_trezorcrypto_Sha3_256_copy_obj,
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1, 1,
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mod_trezorcrypto_Sha3_256_copy);
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STATIC mp_obj_t mod_trezorcrypto_Sha3_256___del__(mp_obj_t self) {
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mp_obj_Sha3_256_t *o = MP_OBJ_TO_PTR(self);
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memzero(&(o->ctx), sizeof(SHA3_CTX));
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_trezorcrypto_Sha3_256___del___obj,
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mod_trezorcrypto_Sha3_256___del__);
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STATIC const mp_rom_map_elem_t mod_trezorcrypto_Sha3_256_locals_dict_table[] = {
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{MP_ROM_QSTR(MP_QSTR_update),
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MP_ROM_PTR(&mod_trezorcrypto_Sha3_256_update_obj)},
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{MP_ROM_QSTR(MP_QSTR_digest),
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MP_ROM_PTR(&mod_trezorcrypto_Sha3_256_digest_obj)},
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{MP_ROM_QSTR(MP_QSTR_copy),
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MP_ROM_PTR(&mod_trezorcrypto_Sha3_256_copy_obj)},
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{MP_ROM_QSTR(MP_QSTR___del__),
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MP_ROM_PTR(&mod_trezorcrypto_Sha3_256___del___obj)},
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{MP_ROM_QSTR(MP_QSTR_block_size), MP_ROM_INT(SHA3_256_BLOCK_LENGTH)},
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{MP_ROM_QSTR(MP_QSTR_digest_size), MP_ROM_INT(SHA3_256_DIGEST_LENGTH)},
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};
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STATIC MP_DEFINE_CONST_DICT(mod_trezorcrypto_Sha3_256_locals_dict,
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mod_trezorcrypto_Sha3_256_locals_dict_table);
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STATIC const mp_obj_type_t mod_trezorcrypto_Sha3_256_type = {
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{&mp_type_type},
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.name = MP_QSTR_Sha3_256,
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.make_new = mod_trezorcrypto_Sha3_256_make_new,
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.locals_dict = (void *)&mod_trezorcrypto_Sha3_256_locals_dict,
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};
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