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Diffstat (limited to 'REORG.TODO/manual/examples/genpass.c')
-rw-r--r-- | REORG.TODO/manual/examples/genpass.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/REORG.TODO/manual/examples/genpass.c b/REORG.TODO/manual/examples/genpass.c new file mode 100644 index 0000000000..7d76dedfbc --- /dev/null +++ b/REORG.TODO/manual/examples/genpass.c @@ -0,0 +1,49 @@ +/* Encrypting Passwords + Copyright (C) 1991-2017 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 +main(void) +{ + unsigned long seed[2]; + char salt[] = "$1$........"; + const char *const seedchars = + "./0123456789ABCDEFGHIJKLMNOPQRST" + "UVWXYZabcdefghijklmnopqrstuvwxyz"; + char *password; + int i; + + /* 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; +} |