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
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 1992-1999,2001,2003,2004,2005,2009 Free Software Foundation, Inc.
*
* GRUB 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.
*
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <grub/types.h>
#include <grub/crypto.h>
#include <grub/auth.h>
#include <grub/emu/misc.h>
#include <grub/util/misc.h>
#include <grub/i18n.h>
#include <grub/misc.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define _GNU_SOURCE 1
#pragma GCC diagnostic ignored "-Wmissing-prototypes"
#pragma GCC diagnostic ignored "-Wmissing-declarations"
#include <argp.h>
#pragma GCC diagnostic error "-Wmissing-prototypes"
#pragma GCC diagnostic error "-Wmissing-declarations"
#include "progname.h"
static struct argp_option options[] = {
{"iteration-count", 'c', N_("NUM"), 0, N_("Number of PBKDF2 iterations"), 0},
{"buflen", 'l', N_("NUM"), 0, N_("Length of generated hash"), 0},
{"salt", 's', N_("NUM"), 0, N_("Length of salt"), 0},
{ 0, 0, 0, 0, 0, 0 }
};
struct arguments
{
unsigned int count;
unsigned int buflen;
unsigned int saltlen;
};
static error_t
argp_parser (int key, char *arg, struct argp_state *state)
{
/* Get the input argument from argp_parse, which we
know is a pointer to our arguments structure. */
struct arguments *arguments = state->input;
switch (key)
{
case 'c':
arguments->count = strtoul (arg, NULL, 0);
break;
case 'l':
arguments->buflen = strtoul (arg, NULL, 0);
break;
case 's':
arguments->saltlen = strtoul (arg, NULL, 0);
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
static struct argp argp = {
options, argp_parser, N_("[OPTIONS]"),
N_("Generate PBKDF2 password hash."),
NULL, NULL, NULL
};
static void
hexify (char *hex, grub_uint8_t *bin, grub_size_t n)
{
while (n--)
{
if (((*bin & 0xf0) >> 4) < 10)
*hex = ((*bin & 0xf0) >> 4) + '0';
else
*hex = ((*bin & 0xf0) >> 4) + 'A' - 10;
hex++;
if ((*bin & 0xf) < 10)
*hex = (*bin & 0xf) + '0';
else
*hex = (*bin & 0xf) + 'A' - 10;
hex++;
bin++;
}
*hex = 0;
}
int
main (int argc, char *argv[])
{
struct arguments arguments = {
.count = 10000,
.buflen = 64,
.saltlen = 64
};
char *result, *ptr;
gcry_err_code_t gcry_err;
grub_uint8_t *buf, *salt;
char pass1[GRUB_AUTH_MAX_PASSLEN];
char pass2[GRUB_AUTH_MAX_PASSLEN];
grub_util_host_init (&argc, &argv);
/* Check for options. */
if (argp_parse (&argp, argc, argv, 0, 0, &arguments) != 0)
{
fprintf (stderr, "%s", _("Error in parsing command line arguments\n"));
exit(1);
}
buf = xmalloc (arguments.buflen);
salt = xmalloc (arguments.saltlen);
printf ("%s", _("Enter password: "));
if (!grub_password_get (pass1, GRUB_AUTH_MAX_PASSLEN))
{
free (buf);
free (salt);
grub_util_error ("%s", _("failure to read password"));
}
printf ("%s", _("Reenter password: "));
if (!grub_password_get (pass2, GRUB_AUTH_MAX_PASSLEN))
{
free (buf);
free (salt);
grub_util_error ("%s", _("failure to read password"));
}
if (strcmp (pass1, pass2) != 0)
{
memset (pass1, 0, sizeof (pass1));
memset (pass2, 0, sizeof (pass2));
free (buf);
free (salt);
grub_util_error ("%s", _("passwords don't match"));
}
memset (pass2, 0, sizeof (pass2));
if (grub_get_random (salt, arguments.saltlen))
{
memset (pass1, 0, sizeof (pass1));
free (buf);
free (salt);
grub_util_error ("%s", _("couldn't retrieve random data for salt"));
}
gcry_err = grub_crypto_pbkdf2 (GRUB_MD_SHA512,
(grub_uint8_t *) pass1, strlen (pass1),
salt, arguments.saltlen,
arguments.count, buf, arguments.buflen);
memset (pass1, 0, sizeof (pass1));
if (gcry_err)
{
memset (buf, 0, arguments.buflen);
free (buf);
memset (salt, 0, arguments.saltlen);
free (salt);
grub_util_error (_("cryptographic error number %d"), gcry_err);
}
result = xmalloc (sizeof ("grub.pbkdf2.sha512.XXXXXXXXXXXXXXXXXXX.S.S")
+ arguments.buflen * 2 + arguments.saltlen * 2);
ptr = result;
memcpy (ptr, "grub.pbkdf2.sha512.", sizeof ("grub.pbkdf2.sha512.") - 1);
ptr += sizeof ("grub.pbkdf2.sha512.") - 1;
grub_snprintf (ptr, sizeof ("XXXXXXXXXXXXXXXXXXX"), "%d", arguments.count);
ptr += strlen (ptr);
*ptr++ = '.';
hexify (ptr, salt, arguments.saltlen);
ptr += arguments.saltlen * 2;
*ptr++ = '.';
hexify (ptr, buf, arguments.buflen);
ptr += arguments.buflen * 2;
*ptr = '\0';
printf (_("PBKDF2 hash of your password is %s\n"), result);
memset (buf, 0, arguments.buflen);
free (buf);
memset (salt, 0, arguments.saltlen);
free (salt);
return 0;
}
|
