#!/usr/local/bin/perl -w#$Id: MD5.pm,v 1.16 2000/09/19 22:19:31 lackas Exp $package MD5;use strict;use integer;use Exporter;use vars qw($VERSION @ISA @EXPORTER @EXPORT_OK);@EXPORT_OK = qw(md5 md5_hex md5_base64);@ISA = 'Exporter';$VERSION = '1.5';# I-Vektorsub A() { 0x67_45_23_01 }sub B() { 0xef_cd_ab_89 }sub C() { 0x98_ba_dc_fe }sub D() { 0x10_32_54_76 }# for internal usesub MAX() { 0xFFFFFFFF }# padd a message to a multiple of 64sub padding($) {    my $l = length (my $msg = shift() . chr(128));        $msg .= "\0" x (($l%64<=56?56:120)-$l%64);    $l = ($l-1)*8;    $msg .= pack 'VV', $l & MAX , ($l >> 16 >> 16);}sub rotate_left($$) {	#$_[0] << $_[1] | $_[0] >> (32 - $_[1]);	#my $right = $_[0] >> (32 - $_[1]);	#my $rmask = (1 << $_[1]) - 1;	($_[0] << $_[1]) | (( $_[0] >> (32 - $_[1])  )  & ((1 << $_[1]) - 1));	#$_[0] << $_[1] | (($_[0]>> (32 - $_[1])) & (1 << (32 - $_[1])) - 1);}sub gen_code {  # Discard upper 32 bits on 64 bit archs.  my $MSK = ((1 << 16) << 16) ? ' & ' . MAX : '';#	FF => "X0=rotate_left(((X1&X2)|(~X1&X3))+X0+X4+X6$MSK,X5)+X1$MSK;",#	GG => "X0=rotate_left(((X1&X3)|(X2&(~X3)))+X0+X4+X6$MSK,X5)+X1$MSK;",  my %f = (	FF => "X0=rotate_left((X3^(X1&(X2^X3)))+X0+X4+X6$MSK,X5)+X1$MSK;",	GG => "X0=rotate_left((X2^(X3&(X1^X2)))+X0+X4+X6$MSK,X5)+X1$MSK;",	HH => "X0=rotate_left((X1^X2^X3)+X0+X4+X6$MSK,X5)+X1$MSK;",	II => "X0=rotate_left((X2^(X1|(~X3)))+X0+X4+X6$MSK,X5)+X1$MSK;",  );  #unless ( (1 << 16) << 16) { %f = %{$CODES{'32bit'}} }  #else { %f = %{$CODES{'64bit'}} }  my %s = (  # shift lengths	S11 => 7, S12 => 12, S13 => 17, S14 => 22, S21 => 5, S22 => 9, S23 => 14,	S24 => 20, S31 => 4, S32 => 11, S33 => 16, S34 => 23, S41 => 6, S42 => 10,	S43 => 15, S44 => 21  );  my $insert = "";  while(<DATA>) {	chomp;	next unless /^[FGHI]/;	my ($func,@x) = split /,/;	my $c = $f{$func};	$c =~ s/X(\d)/$x[$1]/g;	$c =~ s/(S\d{2})/$s{$1}/;        $c =~ s/^(.*)=rotate_left\((.*),(.*)\)\+(.*)$//;	#my $rotate = "(($2 << $3) || (($2 >> (32 - $3)) & (1 << $2) - 1)))"; 	$c = "\$r = $2;        $1 = ((\$r << $3) | ((\$r >> (32 - $3))  & ((1 << $3) - 1))) + $4";	$insert .= "\t$c\n";  }    my $dump = '  sub round {	my ($a,$b,$c,$d) = @_[0 .. 3];	my $r;	' . $insert . '	$_[0]+$a' . $MSK . ', $_[1]+$b ' . $MSK .         ', $_[2]+$c' . $MSK . ', $_[3]+$d' . $MSK . ';  }';  eval $dump;  #print "$dump\n";  #exit 0;}gen_code();# object part of this modulesub new {	my $class = shift;	bless {}, ref($class) || $class;}sub reset {	my $self = shift;	delete $self->{data};	$self}sub add(@) {	my $self = shift;	$self->{data} .= join'', @_;	$self}sub addfile {  	my ($self,$fh) = @_;	if (!ref($fh) && ref(\$fh) ne "GLOB") {	    require Symbol;	    $fh = Symbol::qualify($fh, scalar caller);	}	$self->{data} .= do{local$/;<$fh>};	$self}sub digest {	md5(shift->{data})}sub hexdigest {	md5_hex(shift->{data})}sub b64digest {	md5_base64(shift->{data})}sub md5(@) {	my $message = padding(join'',@_);	my ($a,$b,$c,$d) = (A,B,C,D);	my $i;	for $i (0 .. (length $message)/64-1) {		my @X = unpack 'V16', substr $message,$i*64,64;			($a,$b,$c,$d) = round($a,$b,$c,$d,@X);	}	pack 'V4',$a,$b,$c,$d;}sub md5_hex(@) {    unpack 'H*', &md5;}sub md5_base64(@) {  encode_base64(&md5);}sub encode_base64 ($) {    my $res;    while ($_[0] =~ /(.{1,45})/gs) {	$res .= substr pack('u', $1), 1;	chop $res;    }    $res =~ tr|` -_|AA-Za-z0-9+/|;#`    chop $res;chop $res;    $res;}1;=head1 NAMEDigest::MD5::Perl - Perl implementation of Ron Rivests MD5 Algorithm=head1 DISCLAIMERThis is B<not> an interface (like C<Digest::MD5>) but a Perl implementation of MD5.It is written in perl only and because of this it is slow but it works without C-Code.You should use C<Digest::MD5> instead of this module if it is available.This module is only usefull for=over 4=itemcomputers where you cannot install C<Digest::MD5> (e.g. lack of a C-Compiler)=itemencrypting only small amounts of data (less than one million bytes). I use it tohash passwords.=itemeducational purposes=back=head1 SYNOPSIS # Functional style use Digest::MD5  qw(md5 md5_hex md5_base64); $hash = md5 $data; $hash = md5_hex $data; $hash = md5_base64 $data;     # OO style use Digest::MD5; $ctx = Digest::MD5->new; $ctx->add($data); $ctx->addfile(*FILE); $digest = $ctx->digest; $digest = $ctx->hexdigest; $digest = $ctx->b64digest;=head1 DESCRIPTIONThis modules has the same interface as the much faster C<Digest::MD5>. So you caneasily exchange them, e.g.	BEGIN {	  eval {	    require Digest::MD5;	    import Digest::MD5 'md5_hex'	  };	  if ($@) { # ups, no Digest::MD5	    require Digest::Perl::MD5;	    import Digest::Perl::MD5 'md5_hex'	  }			}If the C<Digest::MD5> module is available it is used and if not you takeC<Digest::Perl::MD5>.You can also install the Perl part of Digest::MD5 together with Digest::Perl::MD5and use Digest::MD5 as normal, it falls back to Digest::Perl::MD5 if itcannot load its object files.For a detailed Documentation see the C<Digest::MD5> module.=head1 EXAMPLESThe simplest way to use this library is to import the md5_hex()function (or one of its cousins):    use Digest::Perl::MD5 'md5_hex';    print 'Digest is ', md5_hex('foobarbaz'), "\n";The above example would print out the message    Digest is 6df23dc03f9b54cc38a0fc1483df6e21provided that the implementation is working correctly.  The samechecksum can also be calculated in OO style:    use Digest::MD5;        $md5 = Digest::MD5->new;    $md5->add('foo', 'bar');    $md5->add('baz');    $digest = $md5->hexdigest;        print "Digest is $digest\n";=head1 LIMITATIONSThis implementation of the MD5 algorithm has some limitations:=over 4=itemIt's slow, very slow. I've done my very best but Digest::MD5 is still about 135 times faster.You can only encrypt Data up to one million bytes in an acceptable time. But it's very usefullfor encrypting small amounts of data like passwords.=itemYou can only encrypt up to 2^32 bits = 512 MB on 32bit archs. You should use C<Digest::MD5>for those amounts of data.=itemC<Digest::Perl::MD5> loads all data to encrypt into memory. This is a todo.=back=head1 SEE ALSOL<Digest::MD5>L<md5sum(1)>RFC 1321=head1 COPYRIGHTThis library is free software; you can redistribute it and/ormodify it under the same terms as Perl itself. Copyright 2000 Christian Lackas, Imperia Software Solutions Copyright 1998-1999 Gisle Aas. Copyright 1995-1996 Neil Winton. Copyright 1991-1992 RSA Data Security, Inc.The MD5 algorithm is defined in RFC 1321. The basic C codeimplementing the algorithm is derived from that in the RFC and iscovered by the following copyright:=over 4=itemCopyright (C) 1991-2, RSA Data Security, Inc. Created 1991. Allrights reserved.License to copy and use this software is granted provided that itis identified as the "RSA Data Security, Inc. MD5 Message-DigestAlgorithm" in all material mentioning or referencing this softwareor this function.License is also granted to make and use derivative works providedthat such works are identified as "derived from the RSA DataSecurity, Inc. MD5 Message-Digest Algorithm" in all materialmentioning or referencing the derived work.RSA Data Security, Inc. makes no representations concerning eitherthe merchantability of this software or the suitability of thissoftware for any particular purpose. It is provided "as is"without express or implied warranty of any kind.These notices must be retained in any copies of any part of thisdocumentation and/or software.=backThis copyright does not prohibit distribution of any version of Perlcontaining this extension under the terms of the GNU or Artisticlicenses.=head1 AUTHORSThe original MD5 interface was written by Neil Winton(C<N.Winton@axion.bt.co.uk>).C<Digest::MD5> was made by Gisle Aas <gisle@aas.no> (I took his Interfaceand part of the documentation)Thanks to Guido Flohr for his 'use integer'-hint.This release was made by Christian Lackas <delta@clackas.de>.=cut__DATA__FF,$a,$b,$c,$d,$_[4],7,0xd76aa478,/* 1 */FF,$d,$a,$b,$c,$_[5],12,0xe8c7b756,/* 2 */FF,$c,$d,$a,$b,$_[6],17,0x242070db,/* 3 */FF,$b,$c,$d,$a,$_[7],22,0xc1bdceee,/* 4 */FF,$a,$b,$c,$d,$_[8],7,0xf57c0faf,/* 5 */FF,$d,$a,$b,$c,$_[9],12,0x4787c62a,/* 6 */FF,$c,$d,$a,$b,$_[10],17,0xa8304613,/* 7 */FF,$b,$c,$d,$a,$_[11],22,0xfd469501,/* 8 */FF,$a,$b,$c,$d,$_[12],7,0x698098d8,/* 9 */FF,$d,$a,$b,$c,$_[13],12,0x8b44f7af,/* 10 */FF,$c,$d,$a,$b,$_[14],17,0xffff5bb1,/* 11 */FF,$b,$c,$d,$a,$_[15],22,0x895cd7be,/* 12 */FF,$a,$b,$c,$d,$_[16],7,0x6b901122,/* 13 */FF,$d,$a,$b,$c,$_[17],12,0xfd987193,/* 14 */FF,$c,$d,$a,$b,$_[18],17,0xa679438e,/* 15 */FF,$b,$c,$d,$a,$_[19],22,0x49b40821,/* 16 */ GG,$a,$b,$c,$d,$_[5],5,0xf61e2562,/* 17 */GG,$d,$a,$b,$c,$_[10],9,0xc040b340,/* 18 */GG,$c,$d,$a,$b,$_[15],14,0x265e5a51,/* 19 */GG,$b,$c,$d,$a,$_[4],20,0xe9b6c7aa,/* 20 */GG,$a,$b,$c,$d,$_[9],5,0xd62f105d,/* 21 */GG,$d,$a,$b,$c,$_[14],9,0x2441453,/* 22 */GG,$c,$d,$a,$b,$_[19],14,0xd8a1e681,/* 23 */GG,$b,$c,$d,$a,$_[8],20,0xe7d3fbc8,/* 24 */GG,$a,$b,$c,$d,$_[13],5,0x21e1cde6,/* 25 */GG,$d,$a,$b,$c,$_[18],9,0xc33707d6,/* 26 */GG,$c,$d,$a,$b,$_[7],14,0xf4d50d87,/* 27 */GG,$b,$c,$d,$a,$_[12],20,0x455a14ed,/* 28 */GG,$a,$b,$c,$d,$_[17],5,0xa9e3e905,/* 29 */GG,$d,$a,$b,$c,$_[6],9,0xfcefa3f8,/* 30 */GG,$c,$d,$a,$b,$_[11],14,0x676f02d9,/* 31 */GG,$b,$c,$d,$a,$_[16],20,0x8d2a4c8a,/* 32 */HH,$a,$b,$c,$d,$_[9],4,0xfffa3942,/* 33 */HH,$d,$a,$b,$c,$_[12],11,0x8771f681,/* 34 */HH,$c,$d,$a,$b,$_[15],16,0x6d9d6122,/* 35 */HH,$b,$c,$d,$a,$_[18],23,0xfde5380c,/* 36 */HH,$a,$b,$c,$d,$_[5],4,0xa4beea44,/* 37 */HH,$d,$a,$b,$c,$_[8],11,0x4bdecfa9,/* 38 */HH,$c,$d,$a,$b,$_[11],16,0xf6bb4b60,/* 39 */HH,$b,$c,$d,$a,$_[14],23,0xbebfbc70,/* 40 */HH,$a,$b,$c,$d,$_[17],4,0x289b7ec6,/* 41 */HH,$d,$a,$b,$c,$_[4],11,0xeaa127fa,/* 42 */HH,$c,$d,$a,$b,$_[7],16,0xd4ef3085,/* 43 */HH,$b,$c,$d,$a,$_[10],23,0x4881d05,/* 44 */HH,$a,$b,$c,$d,$_[13],4,0xd9d4d039,/* 45 */HH,$d,$a,$b,$c,$_[16],11,0xe6db99e5,/* 46 */HH,$c,$d,$a,$b,$_[19],16,0x1fa27cf8,/* 47 */HH,$b,$c,$d,$a,$_[6],23,0xc4ac5665,/* 48 */II,$a,$b,$c,$d,$_[4],6,0xf4292244,/* 49 */II,$d,$a,$b,$c,$_[11],10,0x432aff97,/* 50 */II,$c,$d,$a,$b,$_[18],15,0xab9423a7,/* 51 */II,$b,$c,$d,$a,$_[9],21,0xfc93a039,/* 52 */II,$a,$b,$c,$d,$_[16],6,0x655b59c3,/* 53 */II,$d,$a,$b,$c,$_[7],10,0x8f0ccc92,/* 54 */II,$c,$d,$a,$b,$_[14],15,0xffeff47d,/* 55 */II,$b,$c,$d,$a,$_[5],21,0x85845dd1,/* 56 */II,$a,$b,$c,$d,$_[12],6,0x6fa87e4f,/* 57 */II,$d,$a,$b,$c,$_[19],10,0xfe2ce6e0,/* 58 */II,$c,$d,$a,$b,$_[10],15,0xa3014314,/* 59 */II,$b,$c,$d,$a,$_[17],21,0x4e0811a1,/* 60 */II,$a,$b,$c,$d,$_[8],6,0xf7537e82,/* 61 */II,$d,$a,$b,$c,$_[15],10,0xbd3af235,/* 62 */II,$c,$d,$a,$b,$_[6],15,0x2ad7d2bb,/* 63 */II,$b,$c,$d,$a,$_[13],21,0xeb86d391,/* 64 */