I appreciate how it is done on *nix. It seemed appropriate to KISS in this case. Oh, all right I was just too lazy to offer more detail. Here is a half decent implementation that uses pseudorandom salts..... 

sub crypt_pass {
    my ( $pass ) = @_;
    my @chars = ( 'A'..'Z','a'..'z',0..9,'.','/' );
    my $salt = $chars[rand(64)].$chars[rand(64)];
  return crypt( $pass, $salt );
}

sub check_pass {
    my ( $pass, $hashed ) = @_;
    my $salt = substr $hashed, 0, 2;  # salt is first two chars of has
+h string
  return crypt( $pass, $salt ) eq $hashed ? 1 : 0;
}


for(1..10) {
    my $crypted = crypt_pass( 'japh' );
    printf "%s\t%d\t%d\n", $crypted, 
        check_pass( 'japh', $crypted ), check_pass( '!japh', $crypted 
+);
}

__DATA__
MUNh4wMD2XmEM    1    0
3mGrf7lP7OtZc    1    0
oK7ccq5AtY1xI    1    0
.yrauX5ySsKTc    1    0
zW39UkBxi2jPo    1    0
jEzvJ.irRskvo    1    0
fz54UpRw0TZWc    1    0
a0NMpS2IufmzQ    1    0
wLjbdTPPxpwd.    1    0
WeMtUMzGuNWoc    1    0

[download]

cheers

tachyon

In reply to Re^3: encryption confusion by tachyon
in thread encryption confusion by poprishchin

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