Migrating from PolarSSL to MBEDTLS 3.1 (formerly PolarSSL).
Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
This commit is contained in:
Pol Henarejos
207
mbedtls/platform_util.h
Normal file
207
mbedtls/platform_util.h
Normal file
@@ -0,0 +1,207 @@
|
||||
/**
|
||||
* \file platform_util.h
|
||||
*
|
||||
* \brief Common and shared functions used by multiple modules in the Mbed TLS
|
||||
* library.
|
||||
*/
|
||||
/*
|
||||
* 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_PLATFORM_UTIL_H
|
||||
#define MBEDTLS_PLATFORM_UTIL_H
|
||||
|
||||
#include "mbedtls/build_info.h"
|
||||
|
||||
#include <stddef.h>
|
||||
#if defined(MBEDTLS_HAVE_TIME_DATE)
|
||||
#include "mbedtls/platform_time.h"
|
||||
#include <time.h>
|
||||
#endif /* MBEDTLS_HAVE_TIME_DATE */
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
/* Internal macros meant to be called only from within the library. */
|
||||
#define MBEDTLS_INTERNAL_VALIDATE_RET( cond, ret ) do { } while( 0 )
|
||||
#define MBEDTLS_INTERNAL_VALIDATE( cond ) do { } while( 0 )
|
||||
|
||||
/* Internal helper macros for deprecating API constants. */
|
||||
#if !defined(MBEDTLS_DEPRECATED_REMOVED)
|
||||
#if defined(MBEDTLS_DEPRECATED_WARNING)
|
||||
#define MBEDTLS_DEPRECATED __attribute__((deprecated))
|
||||
MBEDTLS_DEPRECATED typedef char const * mbedtls_deprecated_string_constant_t;
|
||||
#define MBEDTLS_DEPRECATED_STRING_CONSTANT( VAL ) \
|
||||
( (mbedtls_deprecated_string_constant_t) ( VAL ) )
|
||||
MBEDTLS_DEPRECATED typedef int mbedtls_deprecated_numeric_constant_t;
|
||||
#define MBEDTLS_DEPRECATED_NUMERIC_CONSTANT( VAL ) \
|
||||
( (mbedtls_deprecated_numeric_constant_t) ( VAL ) )
|
||||
#else /* MBEDTLS_DEPRECATED_WARNING */
|
||||
#define MBEDTLS_DEPRECATED
|
||||
#define MBEDTLS_DEPRECATED_STRING_CONSTANT( VAL ) VAL
|
||||
#define MBEDTLS_DEPRECATED_NUMERIC_CONSTANT( VAL ) VAL
|
||||
#endif /* MBEDTLS_DEPRECATED_WARNING */
|
||||
#endif /* MBEDTLS_DEPRECATED_REMOVED */
|
||||
|
||||
/* Implementation of the check-return facility.
|
||||
* See the user documentation in mbedtls_config.h.
|
||||
*
|
||||
* Do not use this macro directly to annotate function: instead,
|
||||
* use one of MBEDTLS_CHECK_RETURN_CRITICAL or MBEDTLS_CHECK_RETURN_TYPICAL
|
||||
* depending on how important it is to check the return value.
|
||||
*/
|
||||
#if !defined(MBEDTLS_CHECK_RETURN)
|
||||
#if defined(__GNUC__)
|
||||
#define MBEDTLS_CHECK_RETURN __attribute__((__warn_unused_result__))
|
||||
#elif defined(_MSC_VER) && _MSC_VER >= 1700
|
||||
#include <sal.h>
|
||||
#define MBEDTLS_CHECK_RETURN _Check_return_
|
||||
#else
|
||||
#define MBEDTLS_CHECK_RETURN
|
||||
#endif
|
||||
#endif
|
||||
|
||||
/** Critical-failure function
|
||||
*
|
||||
* This macro appearing at the beginning of the declaration of a function
|
||||
* indicates that its return value should be checked in all applications.
|
||||
* Omitting the check is very likely to indicate a bug in the application
|
||||
* and will result in a compile-time warning if #MBEDTLS_CHECK_RETURN
|
||||
* is implemented for the compiler in use.
|
||||
*
|
||||
* \note The use of this macro is a work in progress.
|
||||
* This macro may be added to more functions in the future.
|
||||
* Such an extension is not considered an API break, provided that
|
||||
* there are near-unavoidable circumstances under which the function
|
||||
* can fail. For example, signature/MAC/AEAD verification functions,
|
||||
* and functions that require a random generator, are considered
|
||||
* return-check-critical.
|
||||
*/
|
||||
#define MBEDTLS_CHECK_RETURN_CRITICAL MBEDTLS_CHECK_RETURN
|
||||
|
||||
/** Ordinary-failure function
|
||||
*
|
||||
* This macro appearing at the beginning of the declaration of a function
|
||||
* indicates that its return value should be generally be checked in portable
|
||||
* applications. Omitting the check will result in a compile-time warning if
|
||||
* #MBEDTLS_CHECK_RETURN is implemented for the compiler in use and
|
||||
* #MBEDTLS_CHECK_RETURN_WARNING is enabled in the compile-time configuration.
|
||||
*
|
||||
* You can use #MBEDTLS_IGNORE_RETURN to explicitly ignore the return value
|
||||
* of a function that is annotated with #MBEDTLS_CHECK_RETURN.
|
||||
*
|
||||
* \note The use of this macro is a work in progress.
|
||||
* This macro will be added to more functions in the future.
|
||||
* Eventually this should appear before most functions returning
|
||||
* an error code (as \c int in the \c mbedtls_xxx API or
|
||||
* as ::psa_status_t in the \c psa_xxx API).
|
||||
*/
|
||||
#if defined(MBEDTLS_CHECK_RETURN_WARNING)
|
||||
#define MBEDTLS_CHECK_RETURN_TYPICAL MBEDTLS_CHECK_RETURN
|
||||
#else
|
||||
#define MBEDTLS_CHECK_RETURN_TYPICAL
|
||||
#endif
|
||||
|
||||
/** Benign-failure function
|
||||
*
|
||||
* This macro appearing at the beginning of the declaration of a function
|
||||
* indicates that it is rarely useful to check its return value.
|
||||
*
|
||||
* This macro has an empty expansion. It exists for documentation purposes:
|
||||
* a #MBEDTLS_CHECK_RETURN_OPTIONAL annotation indicates that the function
|
||||
* has been analyzed for return-check usefuless, whereas the lack of
|
||||
* an annotation indicates that the function has not been analyzed and its
|
||||
* return-check usefulness is unknown.
|
||||
*/
|
||||
#define MBEDTLS_CHECK_RETURN_OPTIONAL
|
||||
|
||||
/** \def MBEDTLS_IGNORE_RETURN
|
||||
*
|
||||
* Call this macro with one argument, a function call, to suppress a warning
|
||||
* from #MBEDTLS_CHECK_RETURN due to that function call.
|
||||
*/
|
||||
#if !defined(MBEDTLS_IGNORE_RETURN)
|
||||
/* GCC doesn't silence the warning with just (void)(result).
|
||||
* (void)!(result) is known to work up at least up to GCC 10, as well
|
||||
* as with Clang and MSVC.
|
||||
*
|
||||
* https://gcc.gnu.org/onlinedocs/gcc-3.4.6/gcc/Non_002dbugs.html
|
||||
* https://stackoverflow.com/questions/40576003/ignoring-warning-wunused-result
|
||||
* https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66425#c34
|
||||
*/
|
||||
#define MBEDTLS_IGNORE_RETURN(result) ( (void) !( result ) )
|
||||
#endif
|
||||
|
||||
/**
|
||||
* \brief Securely zeroize a buffer
|
||||
*
|
||||
* The function is meant to wipe the data contained in a buffer so
|
||||
* that it can no longer be recovered even if the program memory
|
||||
* is later compromised. Call this function on sensitive data
|
||||
* stored on the stack before returning from a function, and on
|
||||
* sensitive data stored on the heap before freeing the heap
|
||||
* object.
|
||||
*
|
||||
* It is extremely difficult to guarantee that calls to
|
||||
* mbedtls_platform_zeroize() are not removed by aggressive
|
||||
* compiler optimizations in a portable way. For this reason, Mbed
|
||||
* TLS provides the configuration option
|
||||
* MBEDTLS_PLATFORM_ZEROIZE_ALT, which allows users to configure
|
||||
* mbedtls_platform_zeroize() to use a suitable implementation for
|
||||
* their platform and needs
|
||||
*
|
||||
* \param buf Buffer to be zeroized
|
||||
* \param len Length of the buffer in bytes
|
||||
*
|
||||
*/
|
||||
void mbedtls_platform_zeroize( void *buf, size_t len );
|
||||
|
||||
#if defined(MBEDTLS_HAVE_TIME_DATE)
|
||||
/**
|
||||
* \brief Platform-specific implementation of gmtime_r()
|
||||
*
|
||||
* The function is a thread-safe abstraction that behaves
|
||||
* similarly to the gmtime_r() function from Unix/POSIX.
|
||||
*
|
||||
* Mbed TLS will try to identify the underlying platform and
|
||||
* make use of an appropriate underlying implementation (e.g.
|
||||
* gmtime_r() for POSIX and gmtime_s() for Windows). If this is
|
||||
* not possible, then gmtime() will be used. In this case, calls
|
||||
* from the library to gmtime() will be guarded by the mutex
|
||||
* mbedtls_threading_gmtime_mutex if MBEDTLS_THREADING_C is
|
||||
* enabled. It is recommended that calls from outside the library
|
||||
* are also guarded by this mutex.
|
||||
*
|
||||
* If MBEDTLS_PLATFORM_GMTIME_R_ALT is defined, then Mbed TLS will
|
||||
* unconditionally use the alternative implementation for
|
||||
* mbedtls_platform_gmtime_r() supplied by the user at compile time.
|
||||
*
|
||||
* \param tt Pointer to an object containing time (in seconds) since the
|
||||
* epoch to be converted
|
||||
* \param tm_buf Pointer to an object where the results will be stored
|
||||
*
|
||||
* \return Pointer to an object of type struct tm on success, otherwise
|
||||
* NULL
|
||||
*/
|
||||
struct tm *mbedtls_platform_gmtime_r( const mbedtls_time_t *tt,
|
||||
struct tm *tm_buf );
|
||||
#endif /* MBEDTLS_HAVE_TIME_DATE */
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* MBEDTLS_PLATFORM_UTIL_H */
|
||||
Reference in New Issue
Block a user