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Make gmtime() configurable at compile-time

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This commit is contained in:
Andres Amaya Garcia 2018-08-16 21:42:09 +01:00
parent d7177435e3
commit 1abb368b87
6 changed files with 117 additions and 33 deletions
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49
library/platform_util.c
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@ -20,6 +20,12 @@
* This file is part of Mbed TLS (https://tls.mbed.org)
*/
/*
* Ensure gmtime_r is available even with -std=c99; must be included before
* config.h, which pulls in glibc's features.h. Harmless on other platforms.
*/
#define _POSIX_C_SOURCE 200112L
#if !defined(MBEDTLS_CONFIG_FILE)
#include "mbedtls/config.h"
#else
@ -27,6 +33,7 @@
#endif
#include "mbedtls/platform_util.h"
#include "mbedtls/threading.h"
#include <stddef.h>
#include <string.h>
@ -65,3 +72,45 @@ void mbedtls_platform_zeroize( void *buf, size_t len )
memset_func( buf, 0, len );
}
#endif /* MBEDTLS_PLATFORM_ZEROIZE_ALT */
#if defined(MBEDTLS_HAVE_TIME_DATE) && !defined(MBEDTLS_PLATFORM_GMTIME_ALT)
#include <time.h>
#if !defined(_WIN32) && (defined(__unix__) || \
(defined(__APPLE__) && defined(__MACH__)))
#include <unistd.h>
#if !defined(_POSIX_VERSION) || _POSIX_C_SOURCE > _POSIX_THREAD_SAFE_FUNCTIONS
#define PLATFORM_UTIL_USE_GMTIME
#endif /* !_POSIX_VERSION || _POSIX_C_SOURCE > _POSIX_THREAD_SAFE_FUNCTIONS */
#endif /* !_WIN32 && (__unix__ || (__APPLE__ && __MACH__)) */
struct tm *mbedtls_platform_gmtime( const mbedtls_time_t *tt,
struct tm *tm_buf )
{
#if defined(_WIN32) && !defined(EFIX64) && !defined(EFI32)
return ( gmtime_s( tm_buf, tt ) == 0 ) ? tm_buf : NULL;
#elif !defined(PLATFORM_UTIL_USE_GMTIME)
return gmtime_r( tt, tm_buf );
#else
struct tm *lt;
#if defined(MBEDTLS_THREADING_C)
if( mbedtls_mutex_lock( &mbedtls_threading_gmtime_mutex ) != 0 )
return( NULL );
#endif /* MBEDTLS_THREADING_C */
lt = gmtime( tt );
if( lt != NULL )
{
memcpy( tm_buf, lt, sizeof( struct tm ) );
}
#if defined(MBEDTLS_THREADING_C)
if( mbedtls_mutex_unlock( &mbedtls_threading_gmtime_mutex ) != 0 )
return( NULL );
#endif /* MBEDTLS_THREADING_C */
return ( lt == NULL ) ? NULL : tm_buf;
#endif
}
#endif /* MBEDTLS_HAVE_TIME_DATE && MBEDTLS_PLATFORM_GMTIME_ALT */