circuitpython/cc3200/mods/moduhashlib.c

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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2014 Paul Sokolovsky
* Copyright (c) 2015 Daniel Campora
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <assert.h>
#include <string.h>
#include "py/mpconfig.h"
#include MICROPY_HAL_H
#include "py/nlr.h"
#include "py/runtime.h"
#include "inc/hw_types.h"
#include "inc/hw_ints.h"
#include "inc/hw_nvic.h"
#include "inc/hw_shamd5.h"
#include "inc/hw_dthe.h"
#include "hw_memmap.h"
#include "rom_map.h"
#include "prcm.h"
#include "shamd5.h"
#include "cryptohash.h"
#include "mpexception.h"
/******************************************************************************
DEFINE PRIVATE TYPES
******************************************************************************/
typedef struct _mp_obj_hash_t {
mp_obj_base_t base;
uint8_t *buffer;
uint32_t b_size;
uint32_t c_size;
uint8_t algo;
uint8_t h_size;
bool fixedlen;
bool digested;
uint8_t hash[32];
} mp_obj_hash_t;
/******************************************************************************
DECLARE PRIVATE FUNCTIONS
******************************************************************************/
STATIC void hash_update_internal(mp_obj_t self_in, mp_obj_t data, bool digest);
STATIC mp_obj_t hash_read (mp_obj_t self_in);
/******************************************************************************
DEFINE PRIVATE FUNCTIONS
******************************************************************************/
STATIC void hash_update_internal(mp_obj_t self_in, mp_obj_t data, bool digest) {
mp_obj_hash_t *self = self_in;
mp_buffer_info_t bufinfo;
if (data) {
mp_get_buffer_raise(data, &bufinfo, MP_BUFFER_READ);
}
if (digest) {
CRYPTOHASH_SHAMD5Start (self->algo, self->b_size);
}
if (self->c_size < self->b_size || !data || !self->fixedlen) {
if (digest || self->fixedlen) {
// no data means we want to process our internal buffer
CRYPTOHASH_SHAMD5Update (data ? bufinfo.buf : self->buffer, data ? bufinfo.len : self->b_size);
self->c_size += data ? bufinfo.len : 0;
} else {
self->buffer = m_renew(byte, self->buffer, self->b_size, self->b_size + bufinfo.len);
mp_seq_copy((byte*)self->buffer + self->b_size, bufinfo.buf, bufinfo.len, byte);
self->b_size += bufinfo.len;
self->digested = false;
}
} else {
mp_raise_msg(&mp_type_OSError, mpexception_os_request_not_possible);
}
}
STATIC mp_obj_t hash_read (mp_obj_t self_in) {
mp_obj_hash_t *self = self_in;
if (!self->fixedlen) {
if (!self->digested) {
hash_update_internal(self, MP_OBJ_NULL, true);
}
} else if (self->c_size < self->b_size) {
// it's a fixed len block which is still incomplete
mp_raise_msg(&mp_type_OSError, mpexception_os_request_not_possible);
}
if (!self->digested) {
CRYPTOHASH_SHAMD5Read ((uint8_t *)self->hash);
self->digested = true;
}
return mp_obj_new_bytes(self->hash, self->h_size);
}
/******************************************************************************/
// Micro Python bindings
/// \classmethod \constructor([data[, block_size]])
/// initial data must be given if block_size wants to be passed
STATIC mp_obj_t hash_make_new(mp_obj_t type_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
mp_arg_check_num(n_args, n_kw, 0, 2, false);
mp_obj_hash_t *self = m_new0(mp_obj_hash_t, 1);
self->base.type = type_in;
if (self->base.type->name == MP_QSTR_sha1) {
self->algo = SHAMD5_ALGO_SHA1;
self->h_size = 20;
} else /* if (self->base.type->name == MP_QSTR_sha256) */ {
self->algo = SHAMD5_ALGO_SHA256;
self->h_size = 32;
} /* else {
self->algo = SHAMD5_ALGO_MD5;
self->h_size = 32;
} */
if (n_args) {
// CPython extension to avoid buffering the data before digesting it
// Note: care must be taken to provide all intermediate blocks as multiple
// of four bytes, otherwise the resulting hash will be incorrect.
// the final block can be of any length
if (n_args > 1) {
// block size given, we will feed the data directly into the hash engine
self->fixedlen = true;
self->b_size = mp_obj_get_int(args[1]);
hash_update_internal(self, args[0], true);
} else {
hash_update_internal(self, args[0], false);
}
}
return self;
}
STATIC mp_obj_t hash_update(mp_obj_t self_in, mp_obj_t arg) {
mp_obj_hash_t *self = self_in;
hash_update_internal(self, arg, false);
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_2(hash_update_obj, hash_update);
STATIC mp_obj_t hash_digest(mp_obj_t self_in) {
return hash_read(self_in);
}
MP_DEFINE_CONST_FUN_OBJ_1(hash_digest_obj, hash_digest);
STATIC const mp_map_elem_t hash_locals_dict_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR_update), (mp_obj_t) &hash_update_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_digest), (mp_obj_t) &hash_digest_obj },
};
STATIC MP_DEFINE_CONST_DICT(hash_locals_dict, hash_locals_dict_table);
//STATIC const mp_obj_type_t md5_type = {
// { &mp_type_type },
// .name = MP_QSTR_md5,
// .make_new = hash_make_new,
// .locals_dict = (mp_obj_t)&hash_locals_dict,
//};
STATIC const mp_obj_type_t sha1_type = {
{ &mp_type_type },
.name = MP_QSTR_sha1,
.make_new = hash_make_new,
.locals_dict = (mp_obj_t)&hash_locals_dict,
};
STATIC const mp_obj_type_t sha256_type = {
{ &mp_type_type },
.name = MP_QSTR_sha256,
.make_new = hash_make_new,
.locals_dict = (mp_obj_t)&hash_locals_dict,
};
STATIC const mp_map_elem_t mp_module_hashlib_globals_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR_uhashlib) },
// { MP_OBJ_NEW_QSTR(MP_QSTR_md5), (mp_obj_t)&md5_type },
{ MP_OBJ_NEW_QSTR(MP_QSTR_sha1), (mp_obj_t)&sha1_type },
{ MP_OBJ_NEW_QSTR(MP_QSTR_sha256), (mp_obj_t)&sha256_type },
};
STATIC MP_DEFINE_CONST_DICT(mp_module_hashlib_globals, mp_module_hashlib_globals_table);
const mp_obj_module_t mp_module_uhashlib = {
.base = { &mp_type_module },
.globals = (mp_obj_dict_t*)&mp_module_hashlib_globals,
};