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#!/usr/bin/perl -w # # Anarion # 02-09-2001 # # FileTransfer encryptet with Blowfish :) # You need the Blowfish module from # # use IO::Socket; use Crypt::Blowfish; use Getopt::Std; use strict; my %opcions; getopts('hd:lp:o:kK:',\%opcions) or ajuda(); ajuda() if $opcions{h} || (! $opcions{d} and ! $opcions{l}) || ! $opci +ons{p}; my $key = exists $opcions{k} && $opcions{k}==1 && llegeix_clau() || ex +ists $opcions{K} && length($opcions{K}) == 8 && $opcions{K} || ''; print $key ? "Using your key\n" : "No valid key introduced, skip encr +iption\n"; server() if $opcions{l}; client() if $opcions{d}; ###### # sub ajuda { die <<AJUDA; Version [1.1] by Anarion Connect to somewhere: $0 -d host -p port [-options] Inbound connects: $0 -l -p port [-options] Options: -o output Redirect the output -k Read the key from STDIN -K key use this key [8 chars] AJUDA } ###### # sub llegeix_clau { local $| = 1; local *TTY; my ($clau1,$clau2); open(TTY,"/dev/tty"); system "stty -echo </dev/tty"; print STDERR "the key must be 8 chars long\nType the key: "; chomp($clau1 = <TTY>); print STDERR "\nRe-type key: "; chomp($clau2 = <TTY>); print "\n\r"; print "Keys dont match\n" and return unless $clau1 eq $clau2; print "The password must be 8 chars long\n" and return if length($ +clau1) != 8; return $clau1; } ###### # sub server { my $socket = IO::Socket::INET->new(LocalPort => $opcions{p}, Listen => 2, Reuse => 1, Type => SOCK_STREAM, Proto => 'tcp', ) or die "Cant bind socket $opcions{p}: $!"; my ($client,$resposta); while ($client = $socket->accept()) { print "Conection from: ",$client->peerhost(),"\nAccept it? [y/ +n]"; chop($resposta = <STDIN>); last if $resposta eq 'y'; close($client); } print "\n"; open(FITXER,">$opcions{o}") || die "Sucks cant create $opcions{o}\ +n" if $opcions{o}; my $sortida = *FITXER; $sortida = *STDOUT unless $opcions{o}; my $blow = new Crypt::Blowfish $key if $key; while(<$client>) { chomp($_); $_ = pack("H*",$_); if ($key) { my @blocks = unpack("a8" x (int(length($_) / 8)+(length($_ +)%8!=0)),$_); my $text; foreach my $block (@blocks) { last unless $block; $text .= $blow->decrypt($block); } $text=~s/ *$//; print $sortida "$text\n"; next; } print $sortida "$_\n"; } exit; } ## # sub client { my $socket = IO::Socket::INET->new(PeerPort => $opcions{p}, PeerAddr => $opcions{d}, Type => SOCK_STREAM, Proto => 'tcp', ) or die "Cant connect to $opcions{d} $opcions{ +p}: $!"; my $blow = new Crypt::Blowfish $key if $key; while(1) { last unless $socket; chomp($_ = <STDIN>); last unless $_; if ($key) { my @blocks = unpack("a8" x (int(length($_) / 8)+(length($_ +)%8!=0)),$_); my $text; foreach my $block (@blocks) { $block .= " " x (8 - length($block)) if length($block) + != 8; $text .= $blow->encrypt($block); } $text= unpack("H*",$text); print $socket "$text\n"; next; } $_ = unpack("H*",$_); print $socket "$_\n"; } close($socket); exit; }

In reply to Netcat like with Blowfish by Anarion

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