mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-16 03:18:09 +00:00
92 lines
3.1 KiB
C
92 lines
3.1 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 "sha2.h"
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#include "memzero.h"
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/// class Sha1:
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/// '''
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/// SHA1 context.
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/// '''
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typedef struct _mp_obj_Sha1_t {
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mp_obj_base_t base;
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SHA1_CTX ctx;
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} mp_obj_Sha1_t;
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STATIC mp_obj_t mod_trezorcrypto_Sha1_update(mp_obj_t self, mp_obj_t data);
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/// def __init__(self, data: 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_Sha1_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, 1, false);
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mp_obj_Sha1_t *o = m_new_obj(mp_obj_Sha1_t);
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o->base.type = type;
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sha1_Init(&(o->ctx));
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// constructor called with bytes/str as first parameter
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if (n_args == 1) {
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mod_trezorcrypto_Sha1_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_Sha1_update(mp_obj_t self, mp_obj_t data) {
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mp_obj_Sha1_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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sha1_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_Sha1_update_obj, mod_trezorcrypto_Sha1_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_Sha1_digest(mp_obj_t self) {
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mp_obj_Sha1_t *o = MP_OBJ_TO_PTR(self);
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uint8_t out[SHA1_DIGEST_LENGTH];
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SHA1_CTX ctx;
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memcpy(&ctx, &(o->ctx), sizeof(SHA1_CTX));
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sha1_Final(&ctx, out);
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memset(&ctx, 0, sizeof(SHA1_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_Sha1_digest_obj, mod_trezorcrypto_Sha1_digest);
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STATIC mp_obj_t mod_trezorcrypto_Sha1___del__(mp_obj_t self) {
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mp_obj_Sha1_t *o = MP_OBJ_TO_PTR(self);
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memzero(&(o->ctx), sizeof(SHA1_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_Sha1___del___obj, mod_trezorcrypto_Sha1___del__);
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STATIC const mp_rom_map_elem_t mod_trezorcrypto_Sha1_locals_dict_table[] = {
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{ MP_ROM_QSTR(MP_QSTR_update), MP_ROM_PTR(&mod_trezorcrypto_Sha1_update_obj) },
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{ MP_ROM_QSTR(MP_QSTR_digest), MP_ROM_PTR(&mod_trezorcrypto_Sha1_digest_obj) },
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{ MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&mod_trezorcrypto_Sha1___del___obj) },
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{ MP_ROM_QSTR(MP_QSTR_block_size), MP_OBJ_NEW_SMALL_INT(SHA1_BLOCK_LENGTH) },
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{ MP_ROM_QSTR(MP_QSTR_digest_size), MP_OBJ_NEW_SMALL_INT(SHA1_DIGEST_LENGTH) },
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};
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STATIC MP_DEFINE_CONST_DICT(mod_trezorcrypto_Sha1_locals_dict, mod_trezorcrypto_Sha1_locals_dict_table);
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STATIC const mp_obj_type_t mod_trezorcrypto_Sha1_type = {
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{ &mp_type_type },
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.name = MP_QSTR_Sha1,
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.make_new = mod_trezorcrypto_Sha1_make_new,
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.locals_dict = (void*)&mod_trezorcrypto_Sha1_locals_dict,
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};
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