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Adapt the platform layer from malloc to calloc

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This commit is contained in:
Manuel Pégourié-Gonnard 2015-05-26 16:15:20 +02:00
parent 7551cb9ee9
commit b9ef1182f3
3 changed files with 31 additions and 30 deletions
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22
include/mbedtls/config.h
View file

@ -78,17 +78,17 @@
*
* Enable the memory allocation layer.
*
* By default mbed TLS uses the system-provided malloc() and free().
* By default mbed TLS uses the system-provided calloc() and free().
* This allows different allocators (self-implemented or provided) to be
* provided to the platform abstraction layer.
*
* Enabling MBEDTLS_PLATFORM_MEMORY without the
* MBEDTLS_PLATFORM_{FREE,MALLOC}_MACROs will provide
* "mbedtls_platform_set_malloc_free()" allowing you to set an alternative malloc() and
* MBEDTLS_PLATFORM_{FREE,CALLOC}_MACROs will provide
* "mbedtls_platform_set_calloc_free()" allowing you to set an alternative calloc() and
* free() function pointer at runtime.
*
* Enabling MBEDTLS_PLATFORM_MEMORY and specifying
* MBEDTLS_PLATFORM_{MALLOC,FREE}_MACROs will allow you to specify the
* MBEDTLS_PLATFORM_{CALLOC,FREE}_MACROs will allow you to specify the
* alternate function at compile time.
*
* Requires: MBEDTLS_PLATFORM_C
@ -100,8 +100,8 @@
/**
* \def MBEDTLS_PLATFORM_NO_STD_FUNCTIONS
*
* Do not assign standard functions in the platform layer (e.g. malloc() to
* MBEDTLS_PLATFORM_STD_MALLOC and printf() to MBEDTLS_PLATFORM_STD_PRINTF)
* Do not assign standard functions in the platform layer (e.g. calloc() to
* MBEDTLS_PLATFORM_STD_CALLOC and printf() to MBEDTLS_PLATFORM_STD_PRINTF)
*
* This makes sure there are no linking errors on platforms that do not support
* these functions. You will HAVE to provide alternatives, either at runtime
@ -1788,7 +1788,7 @@
* \def MBEDTLS_MEMORY_BUFFER_ALLOC_C
*
* Enable the buffer allocator implementation that makes use of a (stack)
* based buffer to 'allocate' dynamic memory. (replaces malloc() and free()
* based buffer to 'allocate' dynamic memory. (replaces calloc() and free()
* calls)
*
* Module: library/memory_buffer_alloc.c
@ -1975,7 +1975,7 @@
* \def MBEDTLS_PLATFORM_C
*
* Enable the platform abstraction layer that allows you to re-assign
* functions like malloc(), free(), snprintf(), printf(), fprintf(), exit()
* functions like calloc(), free(), snprintf(), printf(), fprintf(), exit()
*
* Enabling MBEDTLS_PLATFORM_C enables to use of MBEDTLS_PLATFORM_XXX_ALT
* or MBEDTLS_PLATFORM_XXX_MACRO directives, allowing the functions mentioned
@ -1986,7 +1986,7 @@
*
* This module enables abstraction of common (libc) functions.
*/
//#define MBEDTLS_PLATFORM_C
#define MBEDTLS_PLATFORM_C
/**
* \def MBEDTLS_RIPEMD160_C
@ -2345,7 +2345,7 @@
/* Platform options */
//#define MBEDTLS_PLATFORM_STD_MEM_HDR <stdlib.h> /**< Header to include if MBEDTLS_PLATFORM_NO_STD_FUNCTIONS is defined. Don't define if no header is needed. */
//#define MBEDTLS_PLATFORM_STD_MALLOC malloc /**< Default allocator to use, can be undefined */
//#define MBEDTLS_PLATFORM_STD_CALLOC calloc /**< Default allocator to use, can be undefined */
//#define MBEDTLS_PLATFORM_STD_FREE free /**< Default free to use, can be undefined */
//#define MBEDTLS_PLATFORM_STD_EXIT exit /**< Default exit to use, can be undefined */
//#define MBEDTLS_PLATFORM_STD_FPRINTF fprintf /**< Default fprintf to use, can be undefined */
@ -2354,7 +2354,7 @@
/* To Use Function Macros MBEDTLS_PLATFORM_C must be enabled */
/* MBEDTLS_PLATFORM_XXX_MACRO and MBEDTLS_PLATFORM_XXX_ALT cannot both be defined */
//#define MBEDTLS_PLATFORM_MALLOC_MACRO malloc /**< Default allocator macro to use, can be undefined */
//#define MBEDTLS_PLATFORM_CALLOC_MACRO calloc /**< Default allocator macro to use, can be undefined */
//#define MBEDTLS_PLATFORM_FREE_MACRO free /**< Default free macro to use, can be undefined */
//#define MBEDTLS_PLATFORM_EXIT_MACRO exit /**< Default exit macro to use, can be undefined */
//#define MBEDTLS_PLATFORM_FPRINTF_MACRO fprintf /**< Default fprintf macro to use, can be undefined */

22
include/mbedtls/platform.h
View file

@ -54,8 +54,8 @@ extern "C" {
#if !defined(MBEDTLS_PLATFORM_STD_FPRINTF)
#define MBEDTLS_PLATFORM_STD_FPRINTF fprintf /**< Default fprintf to use */
#endif
#if !defined(MBEDTLS_PLATFORM_STD_MALLOC)
#define MBEDTLS_PLATFORM_STD_MALLOC malloc /**< Default allocator to use */
#if !defined(MBEDTLS_PLATFORM_STD_CALLOC)
#define MBEDTLS_PLATFORM_STD_CALLOC calloc /**< Default allocator to use */
#endif
#if !defined(MBEDTLS_PLATFORM_STD_FREE)
#define MBEDTLS_PLATFORM_STD_FREE free /**< Default free to use */
@ -72,32 +72,32 @@ extern "C" {
/* \} name SECTION: Module settings */
/*
* The function pointers for malloc and free
* The function pointers for calloc and free
*/
#if defined(MBEDTLS_PLATFORM_MEMORY)
#if defined(MBEDTLS_PLATFORM_FREE_MACRO) && \
defined(MBEDTLS_PLATFORM_MALLOC_MACRO)
defined(MBEDTLS_PLATFORM_CALLOC_MACRO)
#define mbedtls_free MBEDTLS_PLATFORM_FREE_MACRO
#define mbedtls_malloc MBEDTLS_PLATFORM_MALLOC_MACRO
#define mbedtls_calloc MBEDTLS_PLATFORM_CALLOC_MACRO
#else
extern void * (*mbedtls_malloc)( size_t len );
extern void * (*mbedtls_calloc)( size_t n, size_t size );
extern void (*mbedtls_free)( void *ptr );
/**
* \brief Set your own memory implementation function pointers
*
* \param malloc_func the malloc function implementation
* \param calloc_func the calloc function implementation
* \param free_func the free function implementation
*
* \return 0 if successful
*/
int mbedtls_platform_set_malloc_free( void * (*malloc_func)( size_t ),
int mbedtls_platform_set_calloc_free( void * (*calloc_func)( size_t, size_t ),
void (*free_func)( void * ) );
#endif /* MBEDTLS_PLATFORM_FREE_MACRO && MBEDTLS_PLATFORM_MALLOC_MACRO */
#endif /* MBEDTLS_PLATFORM_FREE_MACRO && MBEDTLS_PLATFORM_CALLOC_MACRO */
#else /* !MBEDTLS_PLATFORM_MEMORY */
#define mbedtls_free free
#define mbedtls_malloc malloc
#endif /* MBEDTLS_PLATFORM_MEMORY && !MBEDTLS_PLATFORM_{FREE,MALLOC}_MACRO */
#define mbedtls_calloc calloc
#endif /* MBEDTLS_PLATFORM_MEMORY && !MBEDTLS_PLATFORM_{FREE,CALLOC}_MACRO */
/*
* The function pointers for fprintf

17
library/platform.c
View file

@ -31,15 +31,16 @@
#include "mbedtls/platform.h"
#if defined(MBEDTLS_PLATFORM_MEMORY)
#if !defined(MBEDTLS_PLATFORM_STD_MALLOC)
static void *platform_malloc_uninit( size_t len )
#if !defined(MBEDTLS_PLATFORM_STD_CALLOC)
static void *platform_calloc_uninit( size_t n, size_t size )
{
((void) len);
((void) n);
((void) size);
return( NULL );
}
#define MBEDTLS_PLATFORM_STD_MALLOC platform_malloc_uninit
#endif /* !MBEDTLS_PLATFORM_STD_MALLOC */
#define MBEDTLS_PLATFORM_STD_CALLOC platform_calloc_uninit
#endif /* !MBEDTLS_PLATFORM_STD_CALLOC */
#if !defined(MBEDTLS_PLATFORM_STD_FREE)
static void platform_free_uninit( void *ptr )
@ -50,13 +51,13 @@ static void platform_free_uninit( void *ptr )
#define MBEDTLS_PLATFORM_STD_FREE platform_free_uninit
#endif /* !MBEDTLS_PLATFORM_STD_FREE */
void * (*mbedtls_malloc)( size_t ) = MBEDTLS_PLATFORM_STD_MALLOC;
void * (*mbedtls_calloc)( size_t, size_t ) = MBEDTLS_PLATFORM_STD_CALLOC;
void (*mbedtls_free)( void * ) = MBEDTLS_PLATFORM_STD_FREE;
int mbedtls_platform_set_malloc_free( void * (*malloc_func)( size_t ),
int mbedtls_platform_set_calloc_free( void * (*calloc_func)( size_t, size_t ),
void (*free_func)( void * ) )
{
mbedtls_malloc = malloc_func;
mbedtls_calloc = calloc_func;
mbedtls_free = free_func;
return( 0 );
}