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/*
* Copyright (C) 2001-2012 Free Software Foundation, Inc.
*
* Author: Nikos Mavrogiannopoulos
*
* This file is part of GnuTLS.
*
* The GnuTLS is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>
*
*/
#include "gnutls_int.h"
#include "errors.h"
#include "num.h"
#include "xalloc-oversized.h"
gnutls_alloc_function gnutls_secure_malloc = malloc;
gnutls_alloc_function gnutls_malloc = malloc;
gnutls_free_function gnutls_free = free;
gnutls_realloc_function gnutls_realloc = realloc;
void *(*gnutls_calloc)(size_t, size_t) = calloc;
char *(*gnutls_strdup)(const char *) = _gnutls_strdup;
/* This realloc will free ptr in case realloc
* fails.
*/
void *gnutls_realloc_fast(void *ptr, size_t size)
{
void *ret;
if (size == 0)
return ptr;
ret = gnutls_realloc(ptr, size);
if (ret == NULL) {
gnutls_free(ptr);
}
return ret;
}
/* This will free ptr in case reallocarray fails.
*/
void *_gnutls_reallocarray_fast(void *ptr, size_t nmemb, size_t size)
{
void *ret;
if (size == 0)
return ptr;
ret = _gnutls_reallocarray(ptr, nmemb, size);
if (ret == NULL) {
gnutls_free(ptr);
}
return ret;
}
char *_gnutls_strdup(const char *str)
{
size_t siz;
char *ret;
if (unlikely(!str))
return NULL;
siz = strlen(str) + 1;
ret = gnutls_malloc(siz);
if (ret != NULL)
memcpy(ret, str, siz);
return ret;
}
void *_gnutls_reallocarray(void *ptr, size_t nmemb, size_t size)
{
return xalloc_oversized(nmemb, size) ?
NULL :
gnutls_realloc(ptr, nmemb * size);
}
#if 0
/* don't use them. They are included for documentation.
*/
/**
* gnutls_malloc:
* @s: size to allocate in bytes
*
* This function will allocate 's' bytes data, and
* return a pointer to memory. This function is supposed
* to be used by callbacks.
*
* The allocation function used is the one set by
* gnutls_global_set_mem_functions().
**/
void *gnutls_malloc(size_t s)
{
int x;
}
/**
* gnutls_free:
* @ptr: pointer to memory
*
* This function will free data pointed by ptr.
*
* The deallocation function used is the one set by
* gnutls_global_set_mem_functions().
*
**/
void gnutls_free(void *ptr)
{
int x;
}
#endif
/* Returns 1 if the provided buffer is all zero.
* It leaks no information via timing.
*/
unsigned _gnutls_mem_is_zero(const uint8_t *ptr, unsigned size)
{
unsigned i;
uint8_t res = 0;
for (i = 0; i < size; i++) {
res |= ptr[i];
}
return ((res == 0) ? 1 : 0);
}
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