mirror of
https://github.com/RfidResearchGroup/proxmark3.git
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316 lines
8.9 KiB
C
316 lines
8.9 KiB
C
/*
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* Platform abstraction layer
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*
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* Copyright (C) 2006-2016, ARM Limited, All Rights Reserved
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* SPDX-License-Identifier: GPL-2.0
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* This file is part of mbed TLS (https://tls.mbed.org)
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*/
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#if !defined(MBEDTLS_CONFIG_FILE)
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#include "mbedtls/config.h"
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#else
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#include MBEDTLS_CONFIG_FILE
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#endif
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#if defined(MBEDTLS_PLATFORM_C)
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#include "mbedtls/platform.h"
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#include "mbedtls/platform_util.h"
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#if defined(MBEDTLS_PLATFORM_MEMORY)
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#if !defined(MBEDTLS_PLATFORM_STD_CALLOC)
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static void *platform_calloc_uninit(size_t n, size_t size) {
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((void) n);
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((void) size);
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return (NULL);
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}
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#define MBEDTLS_PLATFORM_STD_CALLOC platform_calloc_uninit
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#endif /* !MBEDTLS_PLATFORM_STD_CALLOC */
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#if !defined(MBEDTLS_PLATFORM_STD_FREE)
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static void platform_free_uninit(void *ptr) {
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((void) ptr);
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}
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#define MBEDTLS_PLATFORM_STD_FREE platform_free_uninit
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#endif /* !MBEDTLS_PLATFORM_STD_FREE */
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static void *(*mbedtls_calloc_func)(size_t, size_t) = MBEDTLS_PLATFORM_STD_CALLOC;
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static void (*mbedtls_free_func)(void *) = MBEDTLS_PLATFORM_STD_FREE;
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void *mbedtls_calloc(size_t nmemb, size_t size) {
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return (*mbedtls_calloc_func)(nmemb, size);
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}
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void mbedtls_free(void *ptr) {
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(*mbedtls_free_func)(ptr);
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}
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int mbedtls_platform_set_calloc_free(void *(*calloc_func)(size_t, size_t),
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void (*free_func)(void *)) {
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mbedtls_calloc_func = calloc_func;
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mbedtls_free_func = free_func;
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return (0);
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}
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#endif /* MBEDTLS_PLATFORM_MEMORY */
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#if defined(_WIN32)
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#include <stdarg.h>
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int mbedtls_platform_win32_snprintf(char *s, size_t n, const char *fmt, ...) {
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int ret;
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va_list argp;
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/* Avoid calling the invalid parameter handler by checking ourselves */
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if (s == NULL || n == 0 || fmt == NULL)
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return (-1);
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va_start(argp, fmt);
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#if defined(_TRUNCATE) && !defined(__MINGW32__)
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ret = _vsnprintf_s(s, n, _TRUNCATE, fmt, argp);
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#else
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ret = _vsnprintf(s, n, fmt, argp);
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if (ret < 0 || (size_t) ret == n) {
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s[n - 1] = '\0';
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ret = -1;
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}
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#endif
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va_end(argp);
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return (ret);
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}
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#endif
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#if defined(MBEDTLS_PLATFORM_SNPRINTF_ALT)
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#if !defined(MBEDTLS_PLATFORM_STD_SNPRINTF)
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/*
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* Make dummy function to prevent NULL pointer dereferences
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*/
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static int platform_snprintf_uninit(char *s, size_t n,
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const char *format, ...) {
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((void) s);
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((void) n);
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((void) format);
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return (0);
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}
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#define MBEDTLS_PLATFORM_STD_SNPRINTF platform_snprintf_uninit
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#endif /* !MBEDTLS_PLATFORM_STD_SNPRINTF */
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int (*mbedtls_snprintf)(char *s, size_t n,
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const char *format,
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...) = MBEDTLS_PLATFORM_STD_SNPRINTF;
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int mbedtls_platform_set_snprintf(int (*snprintf_func)(char *s, size_t n,
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const char *format,
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...)) {
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mbedtls_snprintf = snprintf_func;
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return (0);
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}
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#endif /* MBEDTLS_PLATFORM_SNPRINTF_ALT */
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#if defined(MBEDTLS_PLATFORM_PRINTF_ALT)
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#if !defined(MBEDTLS_PLATFORM_STD_PRINTF)
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/*
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* Make dummy function to prevent NULL pointer dereferences
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*/
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static int platform_printf_uninit(const char *format, ...) {
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((void) format);
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return (0);
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}
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#define MBEDTLS_PLATFORM_STD_PRINTF platform_printf_uninit
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#endif /* !MBEDTLS_PLATFORM_STD_PRINTF */
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int (*mbedtls_printf)(const char *, ...) = MBEDTLS_PLATFORM_STD_PRINTF;
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int mbedtls_platform_set_printf(int (*printf_func)(const char *, ...)) {
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mbedtls_printf = printf_func;
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return (0);
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}
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#endif /* MBEDTLS_PLATFORM_PRINTF_ALT */
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#if defined(MBEDTLS_PLATFORM_FPRINTF_ALT)
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#if !defined(MBEDTLS_PLATFORM_STD_FPRINTF)
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/*
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* Make dummy function to prevent NULL pointer dereferences
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*/
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static int platform_fprintf_uninit(FILE *stream, const char *format, ...) {
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((void) stream);
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((void) format);
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return (0);
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}
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#define MBEDTLS_PLATFORM_STD_FPRINTF platform_fprintf_uninit
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#endif /* !MBEDTLS_PLATFORM_STD_FPRINTF */
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int (*mbedtls_fprintf)(FILE *, const char *, ...) =
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MBEDTLS_PLATFORM_STD_FPRINTF;
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int mbedtls_platform_set_fprintf(int (*fprintf_func)(FILE *, const char *, ...)) {
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mbedtls_fprintf = fprintf_func;
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return (0);
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}
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#endif /* MBEDTLS_PLATFORM_FPRINTF_ALT */
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#if defined(MBEDTLS_PLATFORM_EXIT_ALT)
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#if !defined(MBEDTLS_PLATFORM_STD_EXIT)
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/*
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* Make dummy function to prevent NULL pointer dereferences
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*/
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static void platform_exit_uninit(int status) {
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((void) status);
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}
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#define MBEDTLS_PLATFORM_STD_EXIT platform_exit_uninit
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#endif /* !MBEDTLS_PLATFORM_STD_EXIT */
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void (*mbedtls_exit)(int status) = MBEDTLS_PLATFORM_STD_EXIT;
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int mbedtls_platform_set_exit(void (*exit_func)(int status)) {
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mbedtls_exit = exit_func;
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return (0);
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}
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#endif /* MBEDTLS_PLATFORM_EXIT_ALT */
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#if defined(MBEDTLS_HAVE_TIME)
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#if defined(MBEDTLS_PLATFORM_TIME_ALT)
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#if !defined(MBEDTLS_PLATFORM_STD_TIME)
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/*
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* Make dummy function to prevent NULL pointer dereferences
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*/
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static mbedtls_time_t platform_time_uninit(mbedtls_time_t *timer) {
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((void) timer);
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return (0);
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}
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#define MBEDTLS_PLATFORM_STD_TIME platform_time_uninit
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#endif /* !MBEDTLS_PLATFORM_STD_TIME */
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mbedtls_time_t (*mbedtls_time)(mbedtls_time_t *timer) = MBEDTLS_PLATFORM_STD_TIME;
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int mbedtls_platform_set_time(mbedtls_time_t (*time_func)(mbedtls_time_t *timer)) {
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mbedtls_time = time_func;
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return (0);
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}
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#endif /* MBEDTLS_PLATFORM_TIME_ALT */
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#endif /* MBEDTLS_HAVE_TIME */
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#if defined(MBEDTLS_ENTROPY_NV_SEED)
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#if !defined(MBEDTLS_PLATFORM_NO_STD_FUNCTIONS) && defined(MBEDTLS_FS_IO)
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/* Default implementations for the platform independent seed functions use
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* standard libc file functions to read from and write to a pre-defined filename
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*/
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int mbedtls_platform_std_nv_seed_read(unsigned char *buf, size_t buf_len) {
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FILE *file;
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size_t n;
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if ((file = fopen(MBEDTLS_PLATFORM_STD_NV_SEED_FILE, "rb")) == NULL)
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return (-1);
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if ((n = fread(buf, 1, buf_len, file)) != buf_len) {
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fclose(file);
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mbedtls_platform_zeroize(buf, buf_len);
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return (-1);
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}
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fclose(file);
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return ((int)n);
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}
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int mbedtls_platform_std_nv_seed_write(unsigned char *buf, size_t buf_len) {
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FILE *file;
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size_t n;
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if ((file = fopen(MBEDTLS_PLATFORM_STD_NV_SEED_FILE, "w")) == NULL)
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return -1;
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if ((n = fwrite(buf, 1, buf_len, file)) != buf_len) {
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fclose(file);
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return -1;
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}
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fclose(file);
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return ((int)n);
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}
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#endif /* MBEDTLS_PLATFORM_NO_STD_FUNCTIONS */
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#if defined(MBEDTLS_PLATFORM_NV_SEED_ALT)
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#if !defined(MBEDTLS_PLATFORM_STD_NV_SEED_READ)
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/*
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* Make dummy function to prevent NULL pointer dereferences
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*/
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static int platform_nv_seed_read_uninit(unsigned char *buf, size_t buf_len) {
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((void) buf);
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((void) buf_len);
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return (-1);
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}
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#define MBEDTLS_PLATFORM_STD_NV_SEED_READ platform_nv_seed_read_uninit
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#endif /* !MBEDTLS_PLATFORM_STD_NV_SEED_READ */
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#if !defined(MBEDTLS_PLATFORM_STD_NV_SEED_WRITE)
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/*
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* Make dummy function to prevent NULL pointer dereferences
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*/
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static int platform_nv_seed_write_uninit(unsigned char *buf, size_t buf_len) {
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((void) buf);
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((void) buf_len);
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return (-1);
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}
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#define MBEDTLS_PLATFORM_STD_NV_SEED_WRITE platform_nv_seed_write_uninit
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#endif /* !MBEDTLS_PLATFORM_STD_NV_SEED_WRITE */
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int (*mbedtls_nv_seed_read)(unsigned char *buf, size_t buf_len) =
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MBEDTLS_PLATFORM_STD_NV_SEED_READ;
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int (*mbedtls_nv_seed_write)(unsigned char *buf, size_t buf_len) =
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MBEDTLS_PLATFORM_STD_NV_SEED_WRITE;
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int mbedtls_platform_set_nv_seed(
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int (*nv_seed_read_func)(unsigned char *buf, size_t buf_len),
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int (*nv_seed_write_func)(unsigned char *buf, size_t buf_len)) {
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mbedtls_nv_seed_read = nv_seed_read_func;
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mbedtls_nv_seed_write = nv_seed_write_func;
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return (0);
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}
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#endif /* MBEDTLS_PLATFORM_NV_SEED_ALT */
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#endif /* MBEDTLS_ENTROPY_NV_SEED */
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#if !defined(MBEDTLS_PLATFORM_SETUP_TEARDOWN_ALT)
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/*
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* Placeholder platform setup that does nothing by default
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*/
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int mbedtls_platform_setup(mbedtls_platform_context *ctx) {
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(void)ctx;
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return (0);
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}
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/*
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* Placeholder platform teardown that does nothing by default
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*/
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void mbedtls_platform_teardown(mbedtls_platform_context *ctx) {
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(void)ctx;
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}
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#endif /* MBEDTLS_PLATFORM_SETUP_TEARDOWN_ALT */
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#endif /* MBEDTLS_PLATFORM_C */
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