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New macro MBEDTLS_CHECK_RETURN

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Put this macro before a function declaration to indicate that its result
must be checked. This commit supports GCC-like compilers and MSVC >=2012.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine 2021-07-07 21:02:36 +02:00 committed by Mateusz Starzyk
parent 1b95b34c4b
commit 7b8571fcb5
3 changed files with 22 additions and 0 deletions
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1
include/mbedtls/aes.h
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@ -45,6 +45,7 @@
#else
#include MBEDTLS_CONFIG_FILE
#endif
#include "mbedtls/platform_util.h"
#include <stddef.h>
#include <stdint.h>

1
include/mbedtls/des.h
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@ -32,6 +32,7 @@
#else
#include MBEDTLS_CONFIG_FILE
#endif
#include "mbedtls/platform_util.h"
#include <stddef.h>
#include <stdint.h>

20
include/mbedtls/platform_util.h
View File

@ -132,6 +132,26 @@ MBEDTLS_DEPRECATED typedef int mbedtls_deprecated_numeric_constant_t;
#endif /* MBEDTLS_DEPRECATED_WARNING */
#endif /* MBEDTLS_DEPRECATED_REMOVED */
/** \def MBEDTLS_CHECK_RETURN
*
* This macro appearing at the beginning of the declaration of a function
* indicates that its return value should be checked.
*
* 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)
#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
/**
* \brief Securely zeroize a buffer
*