mirror of
https://github.com/pineappleEA/pineapple-src.git
synced 2024-12-04 22:38:26 -05:00
165 lines
5.9 KiB
C
Executable File
165 lines
5.9 KiB
C
Executable File
/*
|
|
* Common and shared functions used by multiple modules in the Mbed TLS
|
|
* library.
|
|
*
|
|
* Copyright The Mbed TLS Contributors
|
|
* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
|
|
*
|
|
* This file is provided under the Apache License 2.0, or the
|
|
* GNU General Public License v2.0 or later.
|
|
*
|
|
* **********
|
|
* Apache License 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.
|
|
*
|
|
* **********
|
|
*
|
|
* **********
|
|
* GNU General Public License v2.0 or later:
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* **********
|
|
*/
|
|
|
|
/*
|
|
* Ensure gmtime_r is available even with -std=c99; must be defined before
|
|
* config.h, which pulls in glibc's features.h. Harmless on other platforms.
|
|
*/
|
|
#if !defined(_POSIX_C_SOURCE)
|
|
#define _POSIX_C_SOURCE 200112L
|
|
#endif
|
|
|
|
#if !defined(MBEDTLS_CONFIG_FILE)
|
|
#include "mbedtls/config.h"
|
|
#else
|
|
#include MBEDTLS_CONFIG_FILE
|
|
#endif
|
|
|
|
#include "mbedtls/platform_util.h"
|
|
#include "mbedtls/platform.h"
|
|
#include "mbedtls/threading.h"
|
|
|
|
#include <stddef.h>
|
|
#include <string.h>
|
|
|
|
#if !defined(MBEDTLS_PLATFORM_ZEROIZE_ALT)
|
|
/*
|
|
* This implementation should never be optimized out by the compiler
|
|
*
|
|
* This implementation for mbedtls_platform_zeroize() was inspired from Colin
|
|
* Percival's blog article at:
|
|
*
|
|
* http://www.daemonology.net/blog/2014-09-04-how-to-zero-a-buffer.html
|
|
*
|
|
* It uses a volatile function pointer to the standard memset(). Because the
|
|
* pointer is volatile the compiler expects it to change at
|
|
* any time and will not optimize out the call that could potentially perform
|
|
* other operations on the input buffer instead of just setting it to 0.
|
|
* Nevertheless, as pointed out by davidtgoldblatt on Hacker News
|
|
* (refer to http://www.daemonology.net/blog/2014-09-05-erratum.html for
|
|
* details), optimizations of the following form are still possible:
|
|
*
|
|
* if( memset_func != memset )
|
|
* memset_func( buf, 0, len );
|
|
*
|
|
* Note that it is extremely difficult to guarantee that
|
|
* mbedtls_platform_zeroize() will not be optimized out by aggressive compilers
|
|
* in a portable way. For this reason, Mbed TLS also 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.
|
|
*/
|
|
static void * (* const volatile memset_func)( void *, int, size_t ) = memset;
|
|
|
|
void mbedtls_platform_zeroize( void *buf, size_t len )
|
|
{
|
|
MBEDTLS_INTERNAL_VALIDATE( len == 0 || buf != NULL );
|
|
|
|
if( len > 0 )
|
|
memset_func( buf, 0, len );
|
|
}
|
|
#endif /* MBEDTLS_PLATFORM_ZEROIZE_ALT */
|
|
|
|
#if defined(MBEDTLS_HAVE_TIME_DATE) && !defined(MBEDTLS_PLATFORM_GMTIME_R_ALT)
|
|
#include <time.h>
|
|
#if !defined(_WIN32) && (defined(unix) || \
|
|
defined(__unix) || defined(__unix__) || (defined(__APPLE__) && \
|
|
defined(__MACH__)))
|
|
#include <unistd.h>
|
|
#endif /* !_WIN32 && (unix || __unix || __unix__ ||
|
|
* (__APPLE__ && __MACH__)) */
|
|
|
|
#if !( ( defined(_POSIX_VERSION) && _POSIX_VERSION >= 200809L ) || \
|
|
( defined(_POSIX_THREAD_SAFE_FUNCTIONS ) && \
|
|
_POSIX_THREAD_SAFE_FUNCTIONS >= 200112L ) )
|
|
/*
|
|
* This is a convenience shorthand macro to avoid checking the long
|
|
* preprocessor conditions above. Ideally, we could expose this macro in
|
|
* platform_util.h and simply use it in platform_util.c, threading.c and
|
|
* threading.h. However, this macro is not part of the Mbed TLS public API, so
|
|
* we keep it private by only defining it in this file
|
|
*/
|
|
#if ! ( defined(_WIN32) && !defined(EFIX64) && !defined(EFI32) )
|
|
#define PLATFORM_UTIL_USE_GMTIME
|
|
#endif /* ! ( defined(_WIN32) && !defined(EFIX64) && !defined(EFI32) ) */
|
|
|
|
#endif /* !( ( defined(_POSIX_VERSION) && _POSIX_VERSION >= 200809L ) || \
|
|
( defined(_POSIX_THREAD_SAFE_FUNCTIONS ) && \
|
|
_POSIX_THREAD_SAFE_FUNCTIONS >= 200112L ) ) */
|
|
|
|
struct tm *mbedtls_platform_gmtime_r( 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 /* _WIN32 && !EFIX64 && !EFI32 */
|
|
}
|
|
#endif /* MBEDTLS_HAVE_TIME_DATE && MBEDTLS_PLATFORM_GMTIME_R_ALT */
|