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Diffstat (limited to 'Master/tlpkg/tlperl/lib/Digest/MD5.pm')
-rw-r--r-- | Master/tlpkg/tlperl/lib/Digest/MD5.pm | 376 |
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diff --git a/Master/tlpkg/tlperl/lib/Digest/MD5.pm b/Master/tlpkg/tlperl/lib/Digest/MD5.pm deleted file mode 100644 index 17fb11d678a..00000000000 --- a/Master/tlpkg/tlperl/lib/Digest/MD5.pm +++ /dev/null @@ -1,376 +0,0 @@ -package Digest::MD5; - -use strict; -use vars qw($VERSION @ISA @EXPORT_OK); - -$VERSION = '2.36'; # $Date: 2005/11/30 13:46:47 $ - -require Exporter; -*import = \&Exporter::import; -@EXPORT_OK = qw(md5 md5_hex md5_base64); - -eval { - require Digest::base; - push(@ISA, 'Digest::base'); -}; -if ($@) { - my $err = $@; - *add_bits = sub { die $err }; -} - - -eval { - require XSLoader; - XSLoader::load('Digest::MD5', $VERSION); -}; -if ($@) { - my $olderr = $@; - eval { - # Try to load the pure perl version - require Digest::Perl::MD5; - - Digest::Perl::MD5->import(qw(md5 md5_hex md5_base64)); - push(@ISA, "Digest::Perl::MD5"); # make OO interface work - }; - if ($@) { - # restore the original error - die $olderr; - } -} -else { - *reset = \&new; -} - -1; -__END__ - -=head1 NAME - -Digest::MD5 - Perl interface to the MD5 Algorithm - -=head1 SYNOPSIS - - # Functional style - use Digest::MD5 qw(md5 md5_hex md5_base64); - - $digest = md5($data); - $digest = md5_hex($data); - $digest = md5_base64($data); - - # OO style - use Digest::MD5; - - $ctx = Digest::MD5->new; - - $ctx->add($data); - $ctx->addfile(*FILE); - - $digest = $ctx->digest; - $digest = $ctx->hexdigest; - $digest = $ctx->b64digest; - -=head1 DESCRIPTION - -The C<Digest::MD5> module allows you to use the RSA Data Security -Inc. MD5 Message Digest algorithm from within Perl programs. The -algorithm takes as input a message of arbitrary length and produces as -output a 128-bit "fingerprint" or "message digest" of the input. - -Note that the MD5 algorithm is not as strong as it used to be. It has -since 2005 been easy to generate different messages that produce the -same MD5 digest. It still seems hard to generate messages that -produce a given digest, but it is probably wise to move to stronger -algorithms for applications that depend on the digest to uniquely identify -a message. - -The C<Digest::MD5> module provide a procedural interface for simple -use, as well as an object oriented interface that can handle messages -of arbitrary length and which can read files directly. - -=head1 FUNCTIONS - -The following functions are provided by the C<Digest::MD5> module. -None of these functions are exported by default. - -=over 4 - -=item md5($data,...) - -This function will concatenate all arguments, calculate the MD5 digest -of this "message", and return it in binary form. The returned string -will be 16 bytes long. - -The result of md5("a", "b", "c") will be exactly the same as the -result of md5("abc"). - -=item md5_hex($data,...) - -Same as md5(), but will return the digest in hexadecimal form. The -length of the returned string will be 32 and it will only contain -characters from this set: '0'..'9' and 'a'..'f'. - -=item md5_base64($data,...) - -Same as md5(), but will return the digest as a base64 encoded string. -The length of the returned string will be 22 and it will only contain -characters from this set: 'A'..'Z', 'a'..'z', '0'..'9', '+' and -'/'. - -Note that the base64 encoded string returned is not padded to be a -multiple of 4 bytes long. If you want interoperability with other -base64 encoded md5 digests you might want to append the redundant -string "==" to the result. - -=back - -=head1 METHODS - -The object oriented interface to C<Digest::MD5> is described in this -section. After a C<Digest::MD5> object has been created, you will add -data to it and finally ask for the digest in a suitable format. A -single object can be used to calculate multiple digests. - -The following methods are provided: - -=over 4 - -=item $md5 = Digest::MD5->new - -The constructor returns a new C<Digest::MD5> object which encapsulate -the state of the MD5 message-digest algorithm. - -If called as an instance method (i.e. $md5->new) it will just reset the -state the object to the state of a newly created object. No new -object is created in this case. - -=item $md5->reset - -This is just an alias for $md5->new. - -=item $md5->clone - -This a copy of the $md5 object. It is useful when you do not want to -destroy the digests state, but need an intermediate value of the -digest, e.g. when calculating digests iteratively on a continuous data -stream. Example: - - my $md5 = Digest::MD5->new; - while (<>) { - $md5->add($_); - print "Line $.: ", $md5->clone->hexdigest, "\n"; - } - -=item $md5->add($data,...) - -The $data provided as argument are appended to the message we -calculate the digest for. The return value is the $md5 object itself. - -All these lines will have the same effect on the state of the $md5 -object: - - $md5->add("a"); $md5->add("b"); $md5->add("c"); - $md5->add("a")->add("b")->add("c"); - $md5->add("a", "b", "c"); - $md5->add("abc"); - -=item $md5->addfile($io_handle) - -The $io_handle will be read until EOF and its content appended to the -message we calculate the digest for. The return value is the $md5 -object itself. - -The addfile() method will croak() if it fails reading data for some -reason. If it croaks it is unpredictable what the state of the $md5 -object will be in. The addfile() method might have been able to read -the file partially before it failed. It is probably wise to discard -or reset the $md5 object if this occurs. - -In most cases you want to make sure that the $io_handle is in -C<binmode> before you pass it as argument to the addfile() method. - -=item $md5->add_bits($data, $nbits) - -=item $md5->add_bits($bitstring) - -Since the MD5 algorithm is byte oriented you might only add bits as -multiples of 8, so you probably want to just use add() instead. The -add_bits() method is provided for compatibility with other digest -implementations. See L<Digest> for description of the arguments -that add_bits() take. - -=item $md5->digest - -Return the binary digest for the message. The returned string will be -16 bytes long. - -Note that the C<digest> operation is effectively a destructive, -read-once operation. Once it has been performed, the C<Digest::MD5> -object is automatically C<reset> and can be used to calculate another -digest value. Call $md5->clone->digest if you want to calculate the -digest without resetting the digest state. - -=item $md5->hexdigest - -Same as $md5->digest, but will return the digest in hexadecimal -form. The length of the returned string will be 32 and it will only -contain characters from this set: '0'..'9' and 'a'..'f'. - -=item $md5->b64digest - -Same as $md5->digest, but will return the digest as a base64 encoded -string. The length of the returned string will be 22 and it will only -contain characters from this set: 'A'..'Z', 'a'..'z', '0'..'9', '+' -and '/'. - - -The base64 encoded string returned is not padded to be a multiple of 4 -bytes long. If you want interoperability with other base64 encoded -md5 digests you might want to append the string "==" to the result. - -=back - - -=head1 EXAMPLES - -The simplest way to use this library is to import the md5_hex() -function (or one of its cousins): - - use Digest::MD5 qw(md5_hex); - print "Digest is ", md5_hex("foobarbaz"), "\n"; - -The above example would print out the message: - - Digest is 6df23dc03f9b54cc38a0fc1483df6e21 - -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"; - -With OO style you can break the message arbitrary. This means that we -are no longer limited to have space for the whole message in memory, i.e. -we can handle messages of any size. - -This is useful when calculating checksum for files: - - use Digest::MD5; - - my $file = shift || "/etc/passwd"; - open(FILE, $file) or die "Can't open '$file': $!"; - binmode(FILE); - - $md5 = Digest::MD5->new; - while (<FILE>) { - $md5->add($_); - } - close(FILE); - print $md5->b64digest, " $file\n"; - -Or we can use the addfile method for more efficient reading of -the file: - - use Digest::MD5; - - my $file = shift || "/etc/passwd"; - open(FILE, $file) or die "Can't open '$file': $!"; - binmode(FILE); - - print Digest::MD5->new->addfile(*FILE)->hexdigest, " $file\n"; - -Perl 5.8 support Unicode characters in strings. Since the MD5 -algorithm is only defined for strings of bytes, it can not be used on -strings that contains chars with ordinal number above 255. The MD5 -functions and methods will croak if you try to feed them such input -data: - - use Digest::MD5 qw(md5_hex); - - my $str = "abc\x{300}"; - print md5_hex($str), "\n"; # croaks - # Wide character in subroutine entry - -What you can do is calculate the MD5 checksum of the UTF-8 -representation of such strings. This is achieved by filtering the -string through encode_utf8() function: - - use Digest::MD5 qw(md5_hex); - use Encode qw(encode_utf8); - - my $str = "abc\x{300}"; - print md5_hex(encode_utf8($str)), "\n"; - # 8c2d46911f3f5a326455f0ed7a8ed3b3 - -=head1 SEE ALSO - -L<Digest>, -L<Digest::MD2>, -L<Digest::SHA1>, -L<Digest::HMAC> - -L<md5sum(1)> - -RFC 1321 - -http://en.wikipedia.org/wiki/MD5 - -The paper "How to Break MD5 and Other Hash Functions" by Xiaoyun Wang -and Hongbo Yu. - -=head1 COPYRIGHT - -This library is free software; you can redistribute it and/or -modify it under the same terms as Perl itself. - - Copyright 1998-2003 Gisle Aas. - Copyright 1995-1996 Neil Winton. - Copyright 1991-1992 RSA Data Security, Inc. - -The MD5 algorithm is defined in RFC 1321. This implementation is -derived from the reference C code in RFC 1321 which is covered by -the following copyright statement: - -=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 C<MD5> interface was written by Neil Winton -(C<N.Winton@axion.bt.co.uk>). - -The C<Digest::MD5> module is written by Gisle Aas <gisle@ActiveState.com>. - -=cut |