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Move bignum code path testing out of the library

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Without this, it's not at all obvious that turning on MBEDTLS_TEST_HOOKS
doesn't change the functional behavior of the code.

Signed-off-by: Janos Follath <janos.follath@arm.com>
This commit is contained in:
Janos Follath
2024-08-22 18:30:06 +01:00
committed by Manuel Pégourié-Gonnard
parent 2f8ad595db
commit 96cfd7a77a
9 changed files with 161 additions and 49 deletions
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48
tests/include/test/bignum_codepath_check.h Normal file
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/** Support for path tracking in optionally safe bignum functions
*
* The functions are called when an optionally safe path is taken and logs it with a single
* variable. This variable is at any time in one of three states:
* - MBEDTLS_MPI_IS_TEST: No optionally safe path has been taken since the last reset
* - MBEDTLS_MPI_IS_SECRET: Only safe paths were teken since the last reset
* - MBEDTLS_MPI_IS_PUBLIC: At least one unsafe path has been taken since the last reset
*
* Using a simple global variable to track execution path. Making it work with multithreading
* doesn't worth the effort as multithreaded tests add little to no value here.
*/
/*
* Copyright The Mbed TLS Contributors
* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
*/
#ifndef BIGNUM_CODEPATH_CHECK_H
#define BIGNUM_CODEPATH_CHECK_H
#include "bignum_core.h"
#if defined(MBEDTLS_TEST_HOOKS) && !defined(MBEDTLS_THREADING_C)
extern int mbedtls_codepath_check;
/**
* \brief Setup the codepath test hooks used by optionally safe bignum functions to signal
* the path taken.
*/
void mbedtls_codepath_test_hooks_setup(void);
/**
* \brief Teardown the codepath test hooks used by optionally safe bignum functions to
* signal the path taken.
*/
void mbedtls_codepath_test_hooks_teardown(void);
/**
* \brief Reset the state of the codepath to the initial state.
*/
static inline void mbedtls_codepath_reset(void)
{
mbedtls_codepath_check = MBEDTLS_MPI_IS_TEST;
}
#endif /* MBEDTLS_TEST_HOOKS && !MBEDTLS_THREADING_C */
#endif /* BIGNUM_CODEPATH_CHECK_H */