mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-28 00:58:09 +00:00
99 lines
3.5 KiB
C
99 lines
3.5 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 "blake2s.h"
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#include "memzero.h"
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/// class Blake2s:
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/// '''
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/// Blake2s context.
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/// '''
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typedef struct _mp_obj_Blake2s_t {
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mp_obj_base_t base;
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BLAKE2S_CTX ctx;
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} mp_obj_Blake2s_t;
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STATIC mp_obj_t mod_trezorcrypto_Blake2s_update(mp_obj_t self, mp_obj_t data);
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/// def __init__(self, data: bytes = None, key: bytes = None) -> 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_Blake2s_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, 2, false);
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mp_obj_Blake2s_t *o = m_new_obj(mp_obj_Blake2s_t);
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o->base.type = type;
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// constructor called with key argument set
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if (n_args == 2) {
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mp_buffer_info_t key;
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mp_get_buffer_raise(args[1], &key, MP_BUFFER_READ);
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blake2s_InitKey(&(o->ctx), BLAKE2S_DIGEST_LENGTH, key.buf, key.len);
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} else {
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blake2s_Init(&(o->ctx), BLAKE2S_DIGEST_LENGTH);
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}
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// constructor called with data argument set
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if (n_args >= 1) {
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mod_trezorcrypto_Blake2s_update(MP_OBJ_FROM_PTR(o), args[0]);
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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_Blake2s_update(mp_obj_t self, mp_obj_t data) {
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mp_obj_Blake2s_t *o = MP_OBJ_TO_PTR(self);
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mp_buffer_info_t msg;
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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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blake2s_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_Blake2s_update_obj, mod_trezorcrypto_Blake2s_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_Blake2s_digest(mp_obj_t self) {
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mp_obj_Blake2s_t *o = MP_OBJ_TO_PTR(self);
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uint8_t out[BLAKE2S_DIGEST_LENGTH];
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BLAKE2S_CTX ctx;
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memcpy(&ctx, &(o->ctx), sizeof(BLAKE2S_CTX));
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blake2s_Final(&ctx, out, BLAKE2S_DIGEST_LENGTH);
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memset(&ctx, 0, sizeof(BLAKE2S_CTX));
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return mp_obj_new_bytes(out, sizeof(out));
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_trezorcrypto_Blake2s_digest_obj, mod_trezorcrypto_Blake2s_digest);
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STATIC mp_obj_t mod_trezorcrypto_Blake2s___del__(mp_obj_t self) {
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mp_obj_Blake2s_t *o = MP_OBJ_TO_PTR(self);
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memzero(&(o->ctx), sizeof(BLAKE2S_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_Blake2s___del___obj, mod_trezorcrypto_Blake2s___del__);
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STATIC const mp_rom_map_elem_t mod_trezorcrypto_Blake2s_locals_dict_table[] = {
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{ MP_ROM_QSTR(MP_QSTR_update), MP_ROM_PTR(&mod_trezorcrypto_Blake2s_update_obj) },
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{ MP_ROM_QSTR(MP_QSTR_digest), MP_ROM_PTR(&mod_trezorcrypto_Blake2s_digest_obj) },
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{ MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&mod_trezorcrypto_Blake2s___del___obj) },
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{ MP_ROM_QSTR(MP_QSTR_block_size), MP_OBJ_NEW_SMALL_INT(BLAKE2S_BLOCK_LENGTH) },
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{ MP_ROM_QSTR(MP_QSTR_digest_size), MP_OBJ_NEW_SMALL_INT(BLAKE2S_DIGEST_LENGTH) },
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};
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STATIC MP_DEFINE_CONST_DICT(mod_trezorcrypto_Blake2s_locals_dict, mod_trezorcrypto_Blake2s_locals_dict_table);
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STATIC const mp_obj_type_t mod_trezorcrypto_Blake2s_type = {
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{ &mp_type_type },
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.name = MP_QSTR_Blake2s,
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.make_new = mod_trezorcrypto_Blake2s_make_new,
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.locals_dict = (void*)&mod_trezorcrypto_Blake2s_locals_dict,
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};
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