52 lines
1.7 KiB
C++
52 lines
1.7 KiB
C++
|
/**
|
||
|
|
* \file constant_time_invasive.h
|
||
|
|
*
|
||
|
|
* \brief Constant-time module: interfaces for invasive testing only.
|
||
|
|
*
|
||
|
|
* The interfaces in this file are intended for testing purposes only.
|
||
|
|
* They SHOULD NOT be made available in library integrations except when
|
||
|
|
* building the library for testing.
|
||
|
|
*/
|
||
|
|
/*
|
||
|
|
* Copyright The Mbed TLS Contributors
|
||
|
|
* SPDX-License-Identifier: Apache-2.0
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License"); you may
|
||
|
|
* not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
||
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef MBEDTLS_CONSTANT_TIME_INVASIVE_H
|
||
|
|
#define MBEDTLS_CONSTANT_TIME_INVASIVE_H
|
||
|
|
|
||
|
|
#include "common.h"
|
||
|
|
|
||
|
|
#if defined(MBEDTLS_TEST_HOOKS)
|
||
|
|
|
||
|
|
/** Turn a value into a mask:
|
||
|
|
* - if \p low <= \p c <= \p high,
|
||
|
|
* return the all-bits 1 mask, aka (unsigned) -1
|
||
|
|
* - otherwise, return the all-bits 0 mask, aka 0
|
||
|
|
*
|
||
|
|
* \param low The value to analyze.
|
||
|
|
* \param high The value to analyze.
|
||
|
|
* \param c The value to analyze.
|
||
|
|
*
|
||
|
|
* \return All-bits-one if \p low <= \p c <= \p high, otherwise zero.
|
||
|
|
*/
|
||
|
|
unsigned char mbedtls_ct_uchar_mask_of_range( unsigned char low,
|
||
|
|
unsigned char high,
|
||
|
|
unsigned char c );
|
||
|
|
|
||
|
|
#endif /* MBEDTLS_TEST_HOOKS */
|
||
|
|
|
||
|
|
#endif /* MBEDTLS_CONSTANT_TIME_INVASIVE_H */
|