crypt PLAINTEXT,SALT
Encrypts a string exactly like the crypt(3) function in the C library.
Useful for checking the password file for lousy passwords, amongst
other things. Only the guys wearing white hats should do this.
Here's an example that makes sure that whoever runs this program knows
their own password:
$pwd = (getpwuid($<))[1];
$salt = substr($pwd, 0, 2);
system "stty ™echo";
print "Password: ";
chop($word = <STDIN>);
print "\n";
system "stty echo";
if (crypt($word, $salt) ne $pwd) {
die "Sorry...\n";
} else {
print "ok\n";
}
Of course, typing in your own password to whoever asks you
for it is unwise.
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