# This library is free software; you can redistribute it and/or
# modify 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.
#!/usr/local/bin/perl -w
#$Id: MD5.pm,v 1.16 2000/09/19 22:19:31 lackas Exp $
package Digest::Perl::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';
$VERSION = '1.5';
# I-Vektor
sub A() { 0x67_45_23_01 }
sub B() { 0xef_cd_ab_89 }
sub C() { 0x98_ba_dc_fe }
sub D() { 0x10_32_54_76 }
# for internal use
sub MAX() { 0xFFFFFFFF }
# padd a message to a multiple of 64
sub padding($) {
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]) ) & ((1 << $_[1]) - 1));
}
sub gen_code {
# Discard upper 32 bits on 64 bit archs.
my $MSK = ((1 << 16) << 16) ? ' & ' . MAX : '';
my %f = (
FF => "X0=rotate_left((X3^(X1&(X2^X3)))+X0+X4+X6$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;",
);
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\((.*),(.*)\)\+(.*)$//;
$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;
}
gen_code();
# object part of this module
sub 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 NAME
Digest::MD5::Perl - Perl implementation of Ron Rivests MD5 Algorithm
=head1 DISCLAIMER
This 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
=item
computers where you cannot install C<Digest::MD5> (e.g. lack of a C-Compiler)
=item
encrypting only small amounts of data (less than one million bytes). I use it to
hash passwords.
=item
educational 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 = $ctx->b64digest;
=head1 DESCRIPTION
This modules has the same interface as the much faster C<Digest::MD5>. So you can
easily exchange them, e.g.
BEGIN {
eval {
require Digest::MD5;
import Digest::MD5 'md5_hex'
};
if ($@) { # 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 take
C<Digest::Perl::MD5>.
You can also install the Perl part of Digest::MD5 together with Digest::Perl::MD5
and use Digest::MD5 as normal, it falls back to Digest::Perl::MD5 if it
cannot load its object files.
For a detailed Documentation see the C<Digest::MD5> module.
=head1 EXAMPLES
The 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 6df23dc03f9b54cc38a0fc1483df6e21
provided that the implementation is working correctly. The same
checksum 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 LIMITATIONS
This implementation of the MD5 algorithm has some limitations:
=over 4
=item
It'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 usefull
for encrypting small amounts of data like passwords.
=item
You can only encrypt up to 2^32 bits = 512 MB on 32bit archs. You should use C<Digest::MD5>
for those amounts of data.
=item
C<Digest::Perl::MD5> loads all data to encrypt into memory. This is a todo.
=back
=head1 SEE ALSO
L<Digest::MD5>
L<md5sum(1)>
RFC 1321
=head1 COPYRIGHT
This library is free software; you can redistribute it and/or
modify 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 code
implementing the algorithm is derived from that in the RFC and is
covered by the following copyright:
=over 4
=item
Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
rights reserved.
License to copy and use this software is granted provided that it
is identified as the "RSA Data Security, Inc. MD5 Message-Digest
Algorithm" in all material mentioning or referencing this software
or this function.
License is also granted to make and use derivative works provided
that such works are identified as "derived from the RSA Data
Security, Inc. MD5 Message-Digest Algorithm" in all material
mentioning or referencing the derived work.
RSA Data Security, Inc. makes no representations concerning either
the merchantability of this software or the suitability of this
software 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 this
documentation and/or software.
=back
This copyright does not prohibit distribution of any version of Perl
containing this extension under the terms of the GNU or Artistic
licenses.
=head1 AUTHORS
The 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 Interface
and 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 */