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d9a17c07 | 1 | /* Encrypting Passwords |
f7a9f785 | 2 | Copyright (C) 1991-2016 Free Software Foundation, Inc. |
d9a17c07 RM |
3 | |
4 | This program is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU General Public License | |
6 | as published by the Free Software Foundation; either version 2 | |
7 | of the License, or (at your option) any later version. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | GNU General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU General Public License | |
15 | along with this program; if not, if not, see <http://www.gnu.org/licenses/>. | |
16 | */ | |
17 | ||
63f791d3 GK |
18 | #include <stdio.h> |
19 | #include <time.h> | |
20 | #include <unistd.h> | |
21 | #include <crypt.h> | |
22 | ||
d9a17c07 | 23 | int |
63f791d3 GK |
24 | main(void) |
25 | { | |
26 | unsigned long seed[2]; | |
27 | char salt[] = "$1$........"; | |
d9a17c07 | 28 | const char *const seedchars = |
63f791d3 GK |
29 | "./0123456789ABCDEFGHIJKLMNOPQRST" |
30 | "UVWXYZabcdefghijklmnopqrstuvwxyz"; | |
31 | char *password; | |
32 | int i; | |
d9a17c07 RM |
33 | |
34 | /* Generate a (not very) random seed. | |
63f791d3 GK |
35 | You should do it better than this... */ |
36 | seed[0] = time(NULL); | |
37 | seed[1] = getpid() ^ (seed[0] >> 14 & 0x30000); | |
d9a17c07 | 38 | |
63f791d3 GK |
39 | /* Turn it into printable characters from `seedchars'. */ |
40 | for (i = 0; i < 8; i++) | |
41 | salt[3+i] = seedchars[(seed[i/5] >> (i%5)*6) & 0x3f]; | |
d9a17c07 | 42 | |
63f791d3 GK |
43 | /* Read in the user's password and encrypt it. */ |
44 | password = crypt(getpass("Password:"), salt); | |
d9a17c07 | 45 | |
63f791d3 GK |
46 | /* Print the results. */ |
47 | puts(password); | |
48 | return 0; | |
49 | } |