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/*
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* Copyright (C) 2001-2012 Free Software Foundation, Inc.
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*
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* Author: Nikos Mavrogiannopoulos
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*
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* This file is part of GnuTLS.
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*
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* The GnuTLS is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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#include "gnutls_int.h"
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#include "errors.h"
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#include <num.h>
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#include <xsize.h>
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gnutls_alloc_function gnutls_secure_malloc = malloc;
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gnutls_alloc_function gnutls_malloc = malloc;
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gnutls_free_function gnutls_free = free;
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gnutls_realloc_function gnutls_realloc = realloc;
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void *(*gnutls_calloc) (size_t, size_t) = calloc;
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char *(*gnutls_strdup) (const char *) = _gnutls_strdup;
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void *_gnutls_calloc(size_t nmemb, size_t size)
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{
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void *ret;
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size_t n = xtimes(nmemb, size);
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ret = (size_in_bounds_p(n) ? gnutls_malloc(n) : NULL);
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if (ret != NULL)
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memset(ret, 0, size);
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return ret;
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}
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/* This realloc will free ptr in case realloc
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* fails.
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*/
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void *gnutls_realloc_fast(void *ptr, size_t size)
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{
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void *ret;
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if (size == 0)
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return ptr;
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ret = gnutls_realloc(ptr, size);
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if (ret == NULL) {
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gnutls_free(ptr);
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}
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return ret;
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}
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char *_gnutls_strdup(const char *str)
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{
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size_t siz;
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char *ret;
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if(unlikely(!str))
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return NULL;
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siz = strlen(str) + 1;
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ret = gnutls_malloc(siz);
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if (ret != NULL)
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memcpy(ret, str, siz);
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return ret;
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}
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#if 0
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/* don't use them. They are included for documentation.
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*/
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/**
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* gnutls_malloc:
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* @s: size to allocate in bytes
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*
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* This function will allocate 's' bytes data, and
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* return a pointer to memory. This function is supposed
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* to be used by callbacks.
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*
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* The allocation function used is the one set by
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* gnutls_global_set_mem_functions().
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**/
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void *gnutls_malloc(size_t s)
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{
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int x;
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}
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/**
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* gnutls_free:
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* @ptr: pointer to memory
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*
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* This function will free data pointed by ptr.
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*
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* The deallocation function used is the one set by
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* gnutls_global_set_mem_functions().
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*
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**/
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void gnutls_free(void *ptr)
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{
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int x;
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}
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#endif
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/* Returns 1 if the provided buffer is all zero.
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* It leaks no information via timing.
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*/
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unsigned _gnutls_mem_is_zero(const uint8_t *ptr, unsigned size)
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{
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unsigned i;
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uint8_t res = 0;
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for (i=0;i
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res |= ptr[i];
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}
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return ((res==0)?1:0);
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}
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