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
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
/*
* Copyright (C) 2001, 2004, 2005, 2007, 2008, 2009 Free Software Foundation
*
* Author: Nikos Mavrogiannopoulos
*
* This file is part of GNUTLS-EXTRA.
*
* GNUTLS-EXTRA is free software: you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* GNUTLS-EXTRA 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see
* <http://www.gnu.org/licenses/>.
*/
#include <gnutls_int.h>
#include <gnutls_errors.h>
#include <gnutls_extensions.h>
#include <gnutls_algorithms.h>
#include <ext_inner_application.h>
#ifdef USE_LZO
# ifdef USE_MINILZO
# include "minilzo/minilzo.h"
# elif HAVE_LZO_LZO1X_H
# include <lzo/lzo1x.h>
# elif HAVE_LZO1X_H
# include <lzo1x.h>
# endif
#endif
#include <gnutls/extra.h>
#ifdef USE_LZO
#include <gnutls_compress.h>
/* the number of the compression algorithms available in the compression
* structure.
*/
extern int _gnutls_comp_algorithms_size;
typedef int (*LZO_FUNC) ();
extern LZO_FUNC _gnutls_lzo1x_decompress_safe;
extern LZO_FUNC _gnutls_lzo1x_1_compress;
extern gnutls_compression_entry _gnutls_compression_algorithms[];
static int
_gnutls_add_lzo_comp (void)
{
int i;
/* find the last element */
for (i = 0; i < _gnutls_comp_algorithms_size; i++)
{
if (_gnutls_compression_algorithms[i].name == NULL)
break;
}
if (_gnutls_compression_algorithms[i].name == NULL
&& (i < _gnutls_comp_algorithms_size - 1))
{
_gnutls_compression_algorithms[i].name = "GNUTLS_COMP_LZO";
_gnutls_compression_algorithms[i].id = GNUTLS_COMP_LZO;
_gnutls_compression_algorithms[i].num = 0xf2;
_gnutls_compression_algorithms[i + 1].name = 0;
/* Now enable the lzo functions: */
_gnutls_lzo1x_decompress_safe = lzo1x_decompress_safe;
_gnutls_lzo1x_1_compress = lzo1x_1_compress;
return 0; /* ok */
}
return GNUTLS_E_MEMORY_ERROR;
}
#endif
static int _gnutls_init_extra = 0;
/**
* gnutls_global_init_extra - initializes the global state of gnutls-extra
*
* This function initializes the global state of gnutls-extra library
* to defaults.
*
* Note that gnutls_global_init() has to be called before this
* function. If this function is not called then the gnutls-extra
* library will not be usable.
*
* This function is not thread safe, see the discussion for
* gnutls_global_init() on how to deal with that.
*
* Returns: On success, %GNUTLS_E_SUCCESS (zero) is returned,
* otherwise an error code is returned.
**/
int
gnutls_global_init_extra (void)
{
int ret;
/* If the version of libgnutls != version of
* libextra, then do not initialize the library.
* This is because it may break things.
*/
if (strcmp (gnutls_check_version (NULL), VERSION) != 0)
{
return GNUTLS_E_LIBRARY_VERSION_MISMATCH;
}
_gnutls_init_extra++;
if (_gnutls_init_extra != 1)
return 0;
ret = gnutls_ext_register (GNUTLS_EXTENSION_INNER_APPLICATION,
"INNER_APPLICATION",
GNUTLS_EXT_TLS,
_gnutls_inner_application_recv_params,
_gnutls_inner_application_send_params);
if (ret != GNUTLS_E_SUCCESS)
return ret;
/* Initialize the LZO library
*/
#ifdef USE_LZO
if (lzo_init () != LZO_E_OK)
return GNUTLS_E_LZO_INIT_FAILED;
/* Add the LZO compression method in the list of compression
* methods.
*/
ret = _gnutls_add_lzo_comp ();
if (ret < 0)
{
gnutls_assert ();
return ret;
}
#endif
return 0;
}
/**
* gnutls_extra_check_version - checks the libgnutls-extra version
* @req_version: version string to compare with, or %NULL.
*
* Check GnuTLS Extra Library version.
*
* See %GNUTLS_EXTRA_VERSION for a suitable @req_version string.
*
* Return value: Check that the version of the library is at
* minimum the one given as a string in @req_version and return the
* actual version string of the library; return %NULL if the
* condition is not met. If %NULL is passed to this function no
* check is done and only the version string is returned.
**/
const char *
gnutls_extra_check_version (const char *req_version)
{
if (!req_version || strverscmp (req_version, VERSION) <= 0)
return VERSION;
return NULL;
}
|
