211 lines
7.3 KiB
C
211 lines
7.3 KiB
C
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2014 Paul Sokolovsky
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* Copyright (c) 2015 Daniel Campora
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <assert.h>
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#include <string.h>
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#include "py/mpconfig.h"
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#include MICROPY_HAL_H
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#include "py/nlr.h"
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#include "py/runtime.h"
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#include "inc/hw_types.h"
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#include "inc/hw_ints.h"
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#include "inc/hw_nvic.h"
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#include "inc/hw_shamd5.h"
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#include "inc/hw_dthe.h"
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#include "hw_memmap.h"
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#include "rom_map.h"
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#include "prcm.h"
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#include "shamd5.h"
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#include "cryptohash.h"
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#include "mpexception.h"
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/******************************************************************************
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DEFINE PRIVATE TYPES
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******************************************************************************/
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typedef struct _mp_obj_hash_t {
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mp_obj_base_t base;
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uint8_t *buffer;
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uint32_t b_size;
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uint32_t c_size;
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uint8_t algo;
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uint8_t h_size;
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bool fixedlen;
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bool digested;
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uint8_t hash[32];
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} mp_obj_hash_t;
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/******************************************************************************
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DECLARE PRIVATE FUNCTIONS
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******************************************************************************/
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STATIC void hash_update_internal(mp_obj_t self_in, mp_obj_t data, bool digest);
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STATIC mp_obj_t hash_read (mp_obj_t self_in);
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/******************************************************************************
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DEFINE PRIVATE FUNCTIONS
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******************************************************************************/
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STATIC void hash_update_internal(mp_obj_t self_in, mp_obj_t data, bool digest) {
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mp_obj_hash_t *self = self_in;
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mp_buffer_info_t bufinfo;
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if (data) {
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mp_get_buffer_raise(data, &bufinfo, MP_BUFFER_READ);
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}
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if (digest) {
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CRYPTOHASH_SHAMD5Start (self->algo, self->b_size);
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}
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if (self->c_size < self->b_size || !data || !self->fixedlen) {
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if (digest || self->fixedlen) {
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// no data means we want to process our internal buffer
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CRYPTOHASH_SHAMD5Update (data ? bufinfo.buf : self->buffer, data ? bufinfo.len : self->b_size);
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self->c_size += data ? bufinfo.len : 0;
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} else {
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self->buffer = m_renew(byte, self->buffer, self->b_size, self->b_size + bufinfo.len);
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mp_seq_copy((byte*)self->buffer + self->b_size, bufinfo.buf, bufinfo.len, byte);
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self->b_size += bufinfo.len;
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self->digested = false;
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}
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} else {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, mpexception_os_request_not_possible));
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}
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}
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STATIC mp_obj_t hash_read (mp_obj_t self_in) {
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mp_obj_hash_t *self = self_in;
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if (!self->fixedlen) {
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if (!self->digested) {
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hash_update_internal(self, MP_OBJ_NULL, true);
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}
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} else if (self->c_size < self->b_size) {
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// it's a fixed len block which is still incomplete
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nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, mpexception_os_request_not_possible));
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}
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if (!self->digested) {
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CRYPTOHASH_SHAMD5Read ((uint8_t *)self->hash);
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self->digested = true;
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}
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return mp_obj_new_bytes(self->hash, self->h_size);
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}
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/******************************************************************************/
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// Micro Python bindings
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/// \classmethod \constructor([data[, block_size]])
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/// initial data must be given if block_size wants to be passed
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STATIC mp_obj_t hash_make_new(mp_obj_t type_in, mp_uint_t n_args, mp_uint_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_hash_t *self = m_new0(mp_obj_hash_t, 1);
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self->base.type = type_in;
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if (self->base.type->name == MP_QSTR_sha1) {
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self->algo = SHAMD5_ALGO_SHA1;
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self->h_size = 20;
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} else /* if (self->base.type->name == MP_QSTR_sha256) */ {
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self->algo = SHAMD5_ALGO_SHA256;
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self->h_size = 32;
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} /* else {
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self->algo = SHAMD5_ALGO_MD5;
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self->h_size = 32;
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} */
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if (n_args) {
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// CPython extension to avoid buffering the data before digesting it
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// Note: care must be taken to provide all intermediate blocks as multiple
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// of four bytes, otherwise the resulting hash will be incorrect.
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// the final block can be of any length
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if (n_args > 1) {
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// block size given, we will feed the data directly into the hash engine
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self->fixedlen = true;
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self->b_size = mp_obj_get_int(args[1]);
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hash_update_internal(self, args[0], true);
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} else {
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hash_update_internal(self, args[0], false);
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}
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}
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return self;
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}
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STATIC mp_obj_t hash_update(mp_obj_t self_in, mp_obj_t arg) {
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mp_obj_hash_t *self = self_in;
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hash_update_internal(self, arg, false);
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_2(hash_update_obj, hash_update);
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STATIC mp_obj_t hash_digest(mp_obj_t self_in) {
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return hash_read(self_in);
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}
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MP_DEFINE_CONST_FUN_OBJ_1(hash_digest_obj, hash_digest);
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STATIC const mp_map_elem_t hash_locals_dict_table[] = {
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{ MP_OBJ_NEW_QSTR(MP_QSTR_update), (mp_obj_t) &hash_update_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_digest), (mp_obj_t) &hash_digest_obj },
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};
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STATIC MP_DEFINE_CONST_DICT(hash_locals_dict, hash_locals_dict_table);
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//STATIC const mp_obj_type_t md5_type = {
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// { &mp_type_type },
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// .name = MP_QSTR_md5,
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// .make_new = hash_make_new,
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// .locals_dict = (mp_obj_t)&hash_locals_dict,
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//};
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STATIC const mp_obj_type_t sha1_type = {
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{ &mp_type_type },
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.name = MP_QSTR_sha1,
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.make_new = hash_make_new,
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.locals_dict = (mp_obj_t)&hash_locals_dict,
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};
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STATIC const mp_obj_type_t sha256_type = {
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{ &mp_type_type },
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.name = MP_QSTR_sha256,
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.make_new = hash_make_new,
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.locals_dict = (mp_obj_t)&hash_locals_dict,
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};
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STATIC const mp_map_elem_t mp_module_hashlib_globals_table[] = {
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{ MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR_uhashlib) },
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// { MP_OBJ_NEW_QSTR(MP_QSTR_md5), (mp_obj_t)&md5_type },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_sha1), (mp_obj_t)&sha1_type },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_sha256), (mp_obj_t)&sha256_type },
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};
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STATIC MP_DEFINE_CONST_DICT(mp_module_hashlib_globals, mp_module_hashlib_globals_table);
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const mp_obj_module_t mp_module_uhashlib = {
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.base = { &mp_type_module },
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.name = MP_QSTR_uhashlib,
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.globals = (mp_obj_dict_t*)&mp_module_hashlib_globals,
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};
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