| 1 |
root |
1.1 |
=head1 NAME |
| 2 |
|
|
|
| 3 |
|
|
Deliantra::Util - utility cruft |
| 4 |
|
|
|
| 5 |
|
|
=head1 SYNOPSIS |
| 6 |
|
|
|
| 7 |
|
|
use Deliantra::Util; |
| 8 |
|
|
|
| 9 |
|
|
=head1 DESCRIPTION |
| 10 |
|
|
|
| 11 |
|
|
Various utilities that come in handy when dealing with Deliantra. |
| 12 |
|
|
|
| 13 |
|
|
=over 4 |
| 14 |
|
|
|
| 15 |
|
|
=cut |
| 16 |
|
|
|
| 17 |
|
|
package Deliantra::Util; |
| 18 |
|
|
|
| 19 |
root |
1.4 |
use common::sense; |
| 20 |
|
|
|
| 21 |
root |
1.7 |
use Digest::SHA; |
| 22 |
root |
1.1 |
|
| 23 |
root |
1.8 |
# helepr function to wrok around bugs in Digest::SHA |
| 24 |
|
|
sub dgst { |
| 25 |
|
|
my $s = shift; |
| 26 |
|
|
utf8::downgrade $s; |
| 27 |
|
|
Digest::SHA::sha512 $s |
| 28 |
|
|
} |
| 29 |
|
|
|
| 30 |
root |
1.1 |
=item Deliantra::Util::hash_pw $cleartext |
| 31 |
|
|
|
| 32 |
|
|
Hashes a cleartext password into the binary password used in the protocol. |
| 33 |
|
|
|
| 34 |
|
|
=cut |
| 35 |
|
|
|
| 36 |
|
|
sub hash_pw($) { |
| 37 |
|
|
# we primarily want to protect the password itself, and |
| 38 |
|
|
# secondarily want to protect us against pre-image attacks. |
| 39 |
root |
1.5 |
# we don't want to overdo it, to keep implementation simple. |
| 40 |
root |
1.1 |
|
| 41 |
|
|
my $pw = shift; |
| 42 |
|
|
|
| 43 |
root |
1.5 |
for (0..10) { |
| 44 |
|
|
$pw = "deliantrakdf$pw" x 32; |
| 45 |
root |
1.8 |
$pw = dgst $pw; |
| 46 |
root |
1.1 |
} |
| 47 |
|
|
|
| 48 |
|
|
$pw |
| 49 |
|
|
} |
| 50 |
|
|
|
| 51 |
root |
1.2 |
=item Deliantra::Util::auth_pw $hash, $nonce1, $nonce2 |
| 52 |
|
|
|
| 53 |
|
|
Authenticates a (hashed) password using the given nonce. |
| 54 |
|
|
|
| 55 |
|
|
=cut |
| 56 |
|
|
|
| 57 |
root |
1.6 |
sub auth_pw($$$) { |
| 58 |
root |
1.4 |
my ($hash, $nonce1, $nonce2) = @_; |
| 59 |
root |
1.2 |
|
| 60 |
|
|
# simple HMAC application |
| 61 |
root |
1.8 |
dgst $nonce1 . dgst $nonce2 . $hash |
| 62 |
root |
1.2 |
} |
| 63 |
|
|
|
| 64 |
root |
1.1 |
=back |
| 65 |
|
|
|
| 66 |
|
|
=head1 AUTHOR |
| 67 |
|
|
|
| 68 |
|
|
Marc Lehmann <schmorp@schmorp.de> |
| 69 |
|
|
http://home.schmorp.de/ |
| 70 |
|
|
|
| 71 |
|
|
=cut |
| 72 |
|
|
|
| 73 |
|
|
1 |
