diff options
Diffstat (limited to 'manual/examples/genpass.c')
| -rw-r--r-- | manual/examples/genpass.c | 31 |
1 files changed, 24 insertions, 7 deletions
diff --git a/manual/examples/genpass.c b/manual/examples/genpass.c index a7626dbed5..cb4d99f069 100644 --- a/manual/examples/genpass.c +++ b/manual/examples/genpass.c @@ -1,31 +1,48 @@ +/* Encrypting Passwords + Copyright (C) 1991-2012 Free Software Foundation, Inc. + + 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, if not, see <http://www.gnu.org/licenses/>. +*/ + #include <stdio.h> #include <time.h> #include <unistd.h> #include <crypt.h> -int +int main(void) { unsigned long seed[2]; char salt[] = "$1$........"; - const char *const seedchars = + const char *const seedchars = "./0123456789ABCDEFGHIJKLMNOPQRST" "UVWXYZabcdefghijklmnopqrstuvwxyz"; char *password; int i; - - /* Generate a (not very) random seed. + + /* Generate a (not very) random seed. You should do it better than this... */ seed[0] = time(NULL); seed[1] = getpid() ^ (seed[0] >> 14 & 0x30000); - + /* Turn it into printable characters from `seedchars'. */ for (i = 0; i < 8; i++) salt[3+i] = seedchars[(seed[i/5] >> (i%5)*6) & 0x3f]; - + /* Read in the user's password and encrypt it. */ password = crypt(getpass("Password:"), salt); - + /* Print the results. */ puts(password); return 0; |