39 lines
1.2 KiB
C++
39 lines
1.2 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 OR GPL-2.0-or-later
|
|
*/
|
|
|
|
#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 */
|