glibc/crypt/genpass.c.texi

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#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;
/* @r{Generate a (not very) random seed.
You should do it better than this...} */
seed[0] = time(NULL);
seed[1] = getpid() ^ (seed[0] >> 14 & 0x30000);
/* @r{Turn it into printable characters from `seedchars'.} */
for (i = 0; i < 8; i++)
salt[3+i] = seedchars[(seed[i/5] >> (i%5)*6) & 0x3f];
/* @r{Read in the user's password and encrypt it.} */
password = crypt(getpass("Password:"), salt);
/* @r{Print the results.} */
puts(password);
return 0;
@}