utils/sha1pass

   1 #!/usr/bin/perl
   2
   3 use bytes;
   4 use Digest::SHA1;
   5 use MIME::Base64;
   6
   7 sub random_bytes($) {
   8     my($n) = @_;
   9     my($v, $i);
  10
  11     if ( open(RANDOM, '<', '/dev/random') ||
  12          open(RANDOM, '<', '/dev/urandom') ) {
  13         read(RANDOM, $v, $n);
  14     } else {
  15         # No real RNG available...
  16         srand($$ ^ time);
  17         $v = '';
  18         for ( $i = 0 ; $i < $n ; $i++ ) {
  19             $v .= ord(int(rand() * 256));
  20         }
  21     }
  22
  23     return $v;
  24 }
  25
  26
  27 ($pass, $salt) = @ARGV;
  28
  29 unless (defined($salt)) {
  30     $salt = MIME::Base64::encode(random_bytes(6), '');
  31 }
  32 $pass = Digest::SHA1::sha1_base64($salt, $pass);
  33
  34 print '$4$', $salt, '$', $pass, "\$\n";