1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
/*
* 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);
}
|
