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
|
/*
* Remmina - The GTK+ Remote Desktop Client
* Copyright (C) 2016-2019 Antenore Gatta, Giovanni Panozzo
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. * If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. * If you
* do not wish to do so, delete this exception statement from your
* version. * If you delete this exception statement from all source
* files in the program, then also delete it here.
*
*/
/**
* @file remmina_sodium.c
* @brief Remmina encryption functions,
* @author Antenore Gatta
* @date 31 Mar 2019
*
* These functions are used to:
* - hash password using the Argon2 hashing algorithm.
* - Encrypt and decrypt data streams (files for examples).
*
* @code
*
* gchar *test = remmina_sodium_pwhash("Password test");
* g_free(test);
* test = remmina_sodium_pwhash_str("Password Test");
* g_free(test);
* gint rc = remmina_sodium_pwhash_str_verify("$argon2id$v=19$m=65536,t=2,p=1$6o+kpazlHSaevezH2J9qUA$4pN75oHgyh1BLc/b+ybLYHjZbatG4ZSCSlxLI32YPY4", "Password Test");
*
* @endcode
*
*/
#include <string.h>
#if defined(__linux__)
# include <fcntl.h>
# include <unistd.h>
# include <sys/ioctl.h>
# include <linux/random.h>
#endif
#include "config.h"
#include <glib.h>
#include "remmina/remmina_trace_calls.h"
#include "remmina_sodium.h"
#if SODIUM_VERSION_INT >= 90200
gchar *remmina_sodium_pwhash(const gchar *pass)
{
TRACE_CALL(__func__);
g_info("Generating passphrase (may take a while)...");
/* Create a random salt for the key derivation function */
unsigned char salt[crypto_pwhash_SALTBYTES] = { 0 };
randombytes_buf(salt, sizeof salt);
/* Use argon2 to convert password to a full size key */
unsigned char key[crypto_secretbox_KEYBYTES];
if (crypto_pwhash(key, sizeof key, pass, strlen(pass), salt,
crypto_pwhash_OPSLIMIT_INTERACTIVE,
crypto_pwhash_MEMLIMIT_INTERACTIVE,
crypto_pwhash_ALG_DEFAULT) != 0) {
g_error("%s - Out of memory!", __func__);
exit(1);
}
g_info("%s - Password hashed", __func__);
return g_strdup((const char *)key);
}
gchar *remmina_sodium_pwhash_str(const gchar *pass)
{
TRACE_CALL(__func__);
g_info("Generating passphrase (may take a while)...");
/* Create a random salt for the key derivation function */
unsigned char salt[crypto_pwhash_SALTBYTES] = { 0 };
randombytes_buf(salt, sizeof salt);
/* Use argon2 to convert password to a full size key */
char key[crypto_pwhash_STRBYTES];
if (crypto_pwhash_str(key, pass, strlen(pass),
crypto_pwhash_OPSLIMIT_INTERACTIVE,
crypto_pwhash_MEMLIMIT_INTERACTIVE) != 0) {
g_error("%s - Out of memory!", __func__);
exit(1);
}
g_info("%s - Password hashed", __func__);
return g_strdup((const char *)key);
}
gint remmina_sodium_pwhash_str_verify(const char *key, const char *pass)
{
TRACE_CALL(__func__);
gint rc;
rc = crypto_pwhash_str_verify(key, pass, strlen(pass));
return rc;
}
void remmina_sodium_init(void)
{
TRACE_CALL(__func__);
#if defined(__linux__) && defined(RNDGETENTCNT)
int fd;
int c;
if ((fd = open("/dev/random", O_RDONLY)) != -1) {
if (ioctl(fd, RNDGETENTCNT, &c) == 0 && c < 160) {
g_printerr("This system doesn't provide enough entropy to quickly generate high-quality random numbers.\n"
"Installing the rng-utils/rng-tools, jitterentropy or haveged packages may help.\n"
"On virtualized Linux environments, also consider using virtio-rng.\n"
"The service will not start until enough entropy has been collected.\n");
}
(void)close(fd);
}
#endif
if (sodium_init() < 0)
g_critical("%s - Failed to initialize sodium, it is not safe to use", __func__);
}
#endif
|
