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PK ��Z2��a�V �V SHA.pmnu �[��� package Digest::SHA; require 5.003000; use strict; use warnings; use vars qw($VERSION @ISA @EXPORT_OK $errmsg); use Fcntl qw(O_RDONLY O_RDWR); use integer; $VERSION = '6.02'; require Exporter; @ISA = qw(Exporter); @EXPORT_OK = qw( $errmsg hmac_sha1 hmac_sha1_base64 hmac_sha1_hex hmac_sha224 hmac_sha224_base64 hmac_sha224_hex hmac_sha256 hmac_sha256_base64 hmac_sha256_hex hmac_sha384 hmac_sha384_base64 hmac_sha384_hex hmac_sha512 hmac_sha512_base64 hmac_sha512_hex hmac_sha512224 hmac_sha512224_base64 hmac_sha512224_hex hmac_sha512256 hmac_sha512256_base64 hmac_sha512256_hex sha1 sha1_base64 sha1_hex sha224 sha224_base64 sha224_hex sha256 sha256_base64 sha256_hex sha384 sha384_base64 sha384_hex sha512 sha512_base64 sha512_hex sha512224 sha512224_base64 sha512224_hex sha512256 sha512256_base64 sha512256_hex); # Inherit from Digest::base if possible eval { require Digest::base; push(@ISA, 'Digest::base'); }; # The following routines aren't time-critical, so they can be left in Perl sub new { my($class, $alg) = @_; $alg =~ s/\D+//g if defined $alg; if (ref($class)) { # instance method if (!defined($alg) || ($alg == $class->algorithm)) { sharewind($class); return($class); } return shainit($class, $alg) ? $class : undef; } $alg = 1 unless defined $alg; return $class->newSHA($alg); } BEGIN { *reset = \&new } sub add_bits { my($self, $data, $nbits) = @_; unless (defined $nbits) { $nbits = length($data); $data = pack("B*", $data); } $nbits = length($data) * 8 if $nbits > length($data) * 8; shawrite($data, $nbits, $self); return($self); } sub _bail { my $msg = shift; $errmsg = $!; $msg .= ": $!"; require Carp; Carp::croak($msg); } { my $_can_T_filehandle; sub _istext { local *FH = shift; my $file = shift; if (! defined $_can_T_filehandle) { local $^W = 0; my $istext = eval { -T FH }; $_can_T_filehandle = $@ ? 0 : 1; return $_can_T_filehandle ? $istext : -T $file; } return $_can_T_filehandle ? -T FH : -T $file; } } sub _addfile { my ($self, $handle) = @_; my $n; my $buf = ""; while (($n = read($handle, $buf, 4096))) { $self->add($buf); } _bail("Read failed") unless defined $n; $self; } sub addfile { my ($self, $file, $mode) = @_; return(_addfile($self, $file)) unless ref(\$file) eq 'SCALAR'; $mode = defined($mode) ? $mode : ""; my ($binary, $UNIVERSAL, $BITS) = map { $_ eq $mode } ("b", "U", "0"); ## Always interpret "-" to mean STDIN; otherwise use ## sysopen to handle full range of POSIX file names. ## If $file is a directory, force an EISDIR error ## by attempting to open with mode O_RDWR local *FH; $file eq '-' and open(FH, '< -') or sysopen(FH, $file, -d $file ? O_RDWR : O_RDONLY) or _bail('Open failed'); if ($BITS) { my ($n, $buf) = (0, ""); while (($n = read(FH, $buf, 4096))) { $buf =~ tr/01//cd; $self->add_bits($buf); } _bail("Read failed") unless defined $n; close(FH); return($self); } binmode(FH) if $binary || $UNIVERSAL; if ($UNIVERSAL && _istext(*FH, $file)) { $self->_addfileuniv(*FH); } else { $self->_addfilebin(*FH) } close(FH); $self; } sub getstate { my $self = shift; my $alg = $self->algorithm or return; my $state = $self->_getstate or return; my $nD = $alg <= 256 ? 8 : 16; my $nH = $alg <= 256 ? 32 : 64; my $nB = $alg <= 256 ? 64 : 128; my($H, $block, $blockcnt, $lenhh, $lenhl, $lenlh, $lenll) = $state =~ /^(.{$nH})(.{$nB})(.{4})(.{4})(.{4})(.{4})(.{4})$/s; for ($alg, $H, $block, $blockcnt, $lenhh, $lenhl, $lenlh, $lenll) { return unless defined $_; } my @s = (); push(@s, "alg:" . $alg); push(@s, "H:" . join(":", unpack("H*", $H) =~ /.{$nD}/g)); push(@s, "block:" . join(":", unpack("H*", $block) =~ /.{2}/g)); push(@s, "blockcnt:" . unpack("N", $blockcnt)); push(@s, "lenhh:" . unpack("N", $lenhh)); push(@s, "lenhl:" . unpack("N", $lenhl)); push(@s, "lenlh:" . unpack("N", $lenlh)); push(@s, "lenll:" . unpack("N", $lenll)); join("\n", @s) . "\n"; } sub putstate { my($class, $state) = @_; my %s = (); for (split(/\n/, $state)) { s/^\s+//; s/\s+$//; next if (/^(#|$)/); my @f = split(/[:\s]+/); my $tag = shift(@f); $s{$tag} = join('', @f); } # H and block may contain arbitrary values, but check everything else grep { $_ == $s{'alg'} } (1,224,256,384,512,512224,512256) or return; length($s{'H'}) == ($s{'alg'} <= 256 ? 64 : 128) or return; length($s{'block'}) == ($s{'alg'} <= 256 ? 128 : 256) or return; { no integer; for (qw(blockcnt lenhh lenhl lenlh lenll)) { 0 <= $s{$_} or return; $s{$_} <= 4294967295 or return; } $s{'blockcnt'} < ($s{'alg'} <= 256 ? 512 : 1024) or return; } my $packed_state = ( pack("H*", $s{'H'}) . pack("H*", $s{'block'}) . pack("N", $s{'blockcnt'}) . pack("N", $s{'lenhh'}) . pack("N", $s{'lenhl'}) . pack("N", $s{'lenlh'}) . pack("N", $s{'lenll'}) ); return $class->new($s{'alg'})->_putstate($packed_state); } sub dump { my $self = shift; my $file = shift; my $state = $self->getstate or return; $file = "-" if (!defined($file) || $file eq ""); local *FH; open(FH, "> $file") or return; print FH $state; close(FH); return($self); } sub load { my $class = shift; my $file = shift; $file = "-" if (!defined($file) || $file eq ""); local *FH; open(FH, "< $file") or return; my $str = join('', <FH>); close(FH); $class->putstate($str); } eval { require XSLoader; XSLoader::load('Digest::SHA', $VERSION); 1; } or do { require DynaLoader; push @ISA, 'DynaLoader'; Digest::SHA->bootstrap($VERSION); }; 1; __END__ =head1 NAME Digest::SHA - Perl extension for SHA-1/224/256/384/512 =head1 SYNOPSIS In programs: # Functional interface use Digest::SHA qw(sha1 sha1_hex sha1_base64 ...); $digest = sha1($data); $digest = sha1_hex($data); $digest = sha1_base64($data); $digest = sha256($data); $digest = sha384_hex($data); $digest = sha512_base64($data); # Object-oriented use Digest::SHA; $sha = Digest::SHA->new($alg); $sha->add($data); # feed data into stream $sha->addfile(*F); $sha->addfile($filename); $sha->add_bits($bits); $sha->add_bits($data, $nbits); $sha_copy = $sha->clone; # make copy of digest object $state = $sha->getstate; # save current state to string $sha->putstate($state); # restore previous $state $digest = $sha->digest; # compute digest $digest = $sha->hexdigest; $digest = $sha->b64digest; From the command line: $ shasum files $ shasum --help =head1 SYNOPSIS (HMAC-SHA) # Functional interface only use Digest::SHA qw(hmac_sha1 hmac_sha1_hex ...); $digest = hmac_sha1($data, $key); $digest = hmac_sha224_hex($data, $key); $digest = hmac_sha256_base64($data, $key); =head1 ABSTRACT Digest::SHA is a complete implementation of the NIST Secure Hash Standard. It gives Perl programmers a convenient way to calculate SHA-1, SHA-224, SHA-256, SHA-384, SHA-512, SHA-512/224, and SHA-512/256 message digests. The module can handle all types of input, including partial-byte data. =head1 DESCRIPTION Digest::SHA is written in C for speed. If your platform lacks a C compiler, you can install the functionally equivalent (but much slower) L<Digest::SHA::PurePerl> module. The programming interface is easy to use: it's the same one found in CPAN's L<Digest> module. So, if your applications currently use L<Digest::MD5> and you'd prefer the stronger security of SHA, it's a simple matter to convert them. The interface provides two ways to calculate digests: all-at-once, or in stages. To illustrate, the following short program computes the SHA-256 digest of "hello world" using each approach: use Digest::SHA qw(sha256_hex); $data = "hello world"; @frags = split(//, $data); # all-at-once (Functional style) $digest1 = sha256_hex($data); # in-stages (OOP style) $state = Digest::SHA->new(256); for (@frags) { $state->add($_) } $digest2 = $state->hexdigest; print $digest1 eq $digest2 ? "whew!\n" : "oops!\n"; To calculate the digest of an n-bit message where I<n> is not a multiple of 8, use the I<add_bits()> method. For example, consider the 446-bit message consisting of the bit-string "110" repeated 148 times, followed by "11". Here's how to display its SHA-1 digest: use Digest::SHA; $bits = "110" x 148 . "11"; $sha = Digest::SHA->new(1)->add_bits($bits); print $sha->hexdigest, "\n"; Note that for larger bit-strings, it's more efficient to use the two-argument version I<add_bits($data, $nbits)>, where I<$data> is in the customary packed binary format used for Perl strings. The module also lets you save intermediate SHA states to a string. The I<getstate()> method generates portable, human-readable text describing the current state of computation. You can subsequently restore that state with I<putstate()> to resume where the calculation left off. To see what a state description looks like, just run the following: use Digest::SHA; print Digest::SHA->new->add("Shaw" x 1962)->getstate; As an added convenience, the Digest::SHA module offers routines to calculate keyed hashes using the HMAC-SHA-1/224/256/384/512 algorithms. These services exist in functional form only, and mimic the style and behavior of the I<sha()>, I<sha_hex()>, and I<sha_base64()> functions. # Test vector from draft-ietf-ipsec-ciph-sha-256-01.txt use Digest::SHA qw(hmac_sha256_hex); print hmac_sha256_hex("Hi There", chr(0x0b) x 32), "\n"; =head1 UNICODE AND SIDE EFFECTS Perl supports Unicode strings as of version 5.6. Such strings may contain wide characters, namely, characters whose ordinal values are greater than 255. This can cause problems for digest algorithms such as SHA that are specified to operate on sequences of bytes. The rule by which Digest::SHA handles a Unicode string is easy to state, but potentially confusing to grasp: the string is interpreted as a sequence of byte values, where each byte value is equal to the ordinal value (viz. code point) of its corresponding Unicode character. That way, the Unicode string 'abc' has exactly the same digest value as the ordinary string 'abc'. Since a wide character does not fit into a byte, the Digest::SHA routines croak if they encounter one. Whereas if a Unicode string contains no wide characters, the module accepts it quite happily. The following code illustrates the two cases: $str1 = pack('U*', (0..255)); print sha1_hex($str1); # ok $str2 = pack('U*', (0..256)); print sha1_hex($str2); # croaks Be aware that the digest routines silently convert UTF-8 input into its equivalent byte sequence in the native encoding (cf. utf8::downgrade). This side effect influences only the way Perl stores the data internally, but otherwise leaves the actual value of the data intact. =head1 NIST STATEMENT ON SHA-1 NIST acknowledges that the work of Prof. Xiaoyun Wang constitutes a practical collision attack on SHA-1. Therefore, NIST encourages the rapid adoption of the SHA-2 hash functions (e.g. SHA-256) for applications requiring strong collision resistance, such as digital signatures. ref. L<http://csrc.nist.gov/groups/ST/hash/statement.html> =head1 PADDING OF BASE64 DIGESTS By convention, CPAN Digest modules do B<not> pad their Base64 output. Problems can occur when feeding such digests to other software that expects properly padded Base64 encodings. For the time being, any necessary padding must be done by the user. Fortunately, this is a simple operation: if the length of a Base64-encoded digest isn't a multiple of 4, simply append "=" characters to the end of the digest until it is: while (length($b64_digest) % 4) { $b64_digest .= '='; } To illustrate, I<sha256_base64("abc")> is computed to be ungWv48Bz+pBQUDeXa4iI7ADYaOWF3qctBD/YfIAFa0 which has a length of 43. So, the properly padded version is ungWv48Bz+pBQUDeXa4iI7ADYaOWF3qctBD/YfIAFa0= =head1 EXPORT None by default. =head1 EXPORTABLE FUNCTIONS Provided your C compiler supports a 64-bit type (e.g. the I<long long> of C99, or I<__int64> used by Microsoft C/C++), all of these functions will be available for use. Otherwise, you won't be able to perform the SHA-384 and SHA-512 transforms, both of which require 64-bit operations. I<Functional style> =over 4 =item B<sha1($data, ...)> =item B<sha224($data, ...)> =item B<sha256($data, ...)> =item B<sha384($data, ...)> =item B<sha512($data, ...)> =item B<sha512224($data, ...)> =item B<sha512256($data, ...)> Logically joins the arguments into a single string, and returns its SHA-1/224/256/384/512 digest encoded as a binary string. =item B<sha1_hex($data, ...)> =item B<sha224_hex($data, ...)> =item B<sha256_hex($data, ...)> =item B<sha384_hex($data, ...)> =item B<sha512_hex($data, ...)> =item B<sha512224_hex($data, ...)> =item B<sha512256_hex($data, ...)> Logically joins the arguments into a single string, and returns its SHA-1/224/256/384/512 digest encoded as a hexadecimal string. =item B<sha1_base64($data, ...)> =item B<sha224_base64($data, ...)> =item B<sha256_base64($data, ...)> =item B<sha384_base64($data, ...)> =item B<sha512_base64($data, ...)> =item B<sha512224_base64($data, ...)> =item B<sha512256_base64($data, ...)> Logically joins the arguments into a single string, and returns its SHA-1/224/256/384/512 digest encoded as a Base64 string. It's important to note that the resulting string does B<not> contain the padding characters typical of Base64 encodings. This omission is deliberate, and is done to maintain compatibility with the family of CPAN Digest modules. See L</"PADDING OF BASE64 DIGESTS"> for details. =back I<OOP style> =over 4 =item B<new($alg)> Returns a new Digest::SHA object. Allowed values for I<$alg> are 1, 224, 256, 384, 512, 512224, or 512256. It's also possible to use common string representations of the algorithm (e.g. "sha256", "SHA-384"). If the argument is missing, SHA-1 will be used by default. Invoking I<new> as an instance method will reset the object to the initial state associated with I<$alg>. If the argument is missing, the object will continue using the same algorithm that was selected at creation. =item B<reset($alg)> This method has exactly the same effect as I<new($alg)>. In fact, I<reset> is just an alias for I<new>. =item B<hashsize> Returns the number of digest bits for this object. The values are 160, 224, 256, 384, 512, 224, and 256 for SHA-1, SHA-224, SHA-256, SHA-384, SHA-512, SHA-512/224 and SHA-512/256, respectively. =item B<algorithm> Returns the digest algorithm for this object. The values are 1, 224, 256, 384, 512, 512224, and 512256 for SHA-1, SHA-224, SHA-256, SHA-384, SHA-512, SHA-512/224, and SHA-512/256, respectively. =item B<clone> Returns a duplicate copy of the object. =item B<add($data, ...)> Logically joins the arguments into a single string, and uses it to update the current digest state. In other words, the following statements have the same effect: $sha->add("a"); $sha->add("b"); $sha->add("c"); $sha->add("a")->add("b")->add("c"); $sha->add("a", "b", "c"); $sha->add("abc"); The return value is the updated object itself. =item B<add_bits($data, $nbits)> =item B<add_bits($bits)> Updates the current digest state by appending bits to it. The return value is the updated object itself. The first form causes the most-significant I<$nbits> of I<$data> to be appended to the stream. The I<$data> argument is in the customary binary format used for Perl strings. The second form takes an ASCII string of "0" and "1" characters as its argument. It's equivalent to $sha->add_bits(pack("B*", $bits), length($bits)); So, the following two statements do the same thing: $sha->add_bits("111100001010"); $sha->add_bits("\xF0\xA0", 12); Note that SHA-1 and SHA-2 use I<most-significant-bit ordering> for their internal state. This means that $sha3->add_bits("110"); is equivalent to $sha3->add_bits("1")->add_bits("1")->add_bits("0"); =item B<addfile(*FILE)> Reads from I<FILE> until EOF, and appends that data to the current state. The return value is the updated object itself. =item B<addfile($filename [, $mode])> Reads the contents of I<$filename>, and appends that data to the current state. The return value is the updated object itself. By default, I<$filename> is simply opened and read; no special modes or I/O disciplines are used. To change this, set the optional I<$mode> argument to one of the following values: "b" read file in binary mode "U" use universal newlines "0" use BITS mode The "U" mode is modeled on Python's "Universal Newlines" concept, whereby DOS and Mac OS line terminators are converted internally to UNIX newlines before processing. This ensures consistent digest values when working simultaneously across multiple file systems. B<The "U" mode influences only text files>, namely those passing Perl's I<-T> test; binary files are processed with no translation whatsoever. The BITS mode ("0") interprets the contents of I<$filename> as a logical stream of bits, where each ASCII '0' or '1' character represents a 0 or 1 bit, respectively. All other characters are ignored. This provides a convenient way to calculate the digest values of partial-byte data by using files, rather than having to write separate programs employing the I<add_bits> method. =item B<getstate> Returns a string containing a portable, human-readable representation of the current SHA state. =item B<putstate($str)> Returns a Digest::SHA object representing the SHA state contained in I<$str>. The format of I<$str> matches the format of the output produced by method I<getstate>. If called as a class method, a new object is created; if called as an instance method, the object is reset to the state contained in I<$str>. =item B<dump($filename)> Writes the output of I<getstate> to I<$filename>. If the argument is missing, or equal to the empty string, the state information will be written to STDOUT. =item B<load($filename)> Returns a Digest::SHA object that results from calling I<putstate> on the contents of I<$filename>. If the argument is missing, or equal to the empty string, the state information will be read from STDIN. =item B<digest> Returns the digest encoded as a binary string. Note that the I<digest> method is a read-once operation. Once it has been performed, the Digest::SHA object is automatically reset in preparation for calculating another digest value. Call I<$sha-E<gt>clone-E<gt>digest> if it's necessary to preserve the original digest state. =item B<hexdigest> Returns the digest encoded as a hexadecimal string. Like I<digest>, this method is a read-once operation. Call I<$sha-E<gt>clone-E<gt>hexdigest> if it's necessary to preserve the original digest state. =item B<b64digest> Returns the digest encoded as a Base64 string. Like I<digest>, this method is a read-once operation. Call I<$sha-E<gt>clone-E<gt>b64digest> if it's necessary to preserve the original digest state. It's important to note that the resulting string does B<not> contain the padding characters typical of Base64 encodings. This omission is deliberate, and is done to maintain compatibility with the family of CPAN Digest modules. See L</"PADDING OF BASE64 DIGESTS"> for details. =back I<HMAC-SHA-1/224/256/384/512> =over 4 =item B<hmac_sha1($data, $key)> =item B<hmac_sha224($data, $key)> =item B<hmac_sha256($data, $key)> =item B<hmac_sha384($data, $key)> =item B<hmac_sha512($data, $key)> =item B<hmac_sha512224($data, $key)> =item B<hmac_sha512256($data, $key)> Returns the HMAC-SHA-1/224/256/384/512 digest of I<$data>/I<$key>, with the result encoded as a binary string. Multiple I<$data> arguments are allowed, provided that I<$key> is the last argument in the list. =item B<hmac_sha1_hex($data, $key)> =item B<hmac_sha224_hex($data, $key)> =item B<hmac_sha256_hex($data, $key)> =item B<hmac_sha384_hex($data, $key)> =item B<hmac_sha512_hex($data, $key)> =item B<hmac_sha512224_hex($data, $key)> =item B<hmac_sha512256_hex($data, $key)> Returns the HMAC-SHA-1/224/256/384/512 digest of I<$data>/I<$key>, with the result encoded as a hexadecimal string. Multiple I<$data> arguments are allowed, provided that I<$key> is the last argument in the list. =item B<hmac_sha1_base64($data, $key)> =item B<hmac_sha224_base64($data, $key)> =item B<hmac_sha256_base64($data, $key)> =item B<hmac_sha384_base64($data, $key)> =item B<hmac_sha512_base64($data, $key)> =item B<hmac_sha512224_base64($data, $key)> =item B<hmac_sha512256_base64($data, $key)> Returns the HMAC-SHA-1/224/256/384/512 digest of I<$data>/I<$key>, with the result encoded as a Base64 string. Multiple I<$data> arguments are allowed, provided that I<$key> is the last argument in the list. It's important to note that the resulting string does B<not> contain the padding characters typical of Base64 encodings. This omission is deliberate, and is done to maintain compatibility with the family of CPAN Digest modules. See L</"PADDING OF BASE64 DIGESTS"> for details. =back =head1 SEE ALSO L<Digest>, L<Digest::SHA::PurePerl> The Secure Hash Standard (Draft FIPS PUB 180-4) can be found at: L<http://csrc.nist.gov/publications/drafts/fips180-4/Draft-FIPS180-4_Feb2011.pdf> The Keyed-Hash Message Authentication Code (HMAC): L<http://csrc.nist.gov/publications/fips/fips198/fips-198a.pdf> =head1 AUTHOR Mark Shelor <mshelor@cpan.org> =head1 ACKNOWLEDGMENTS The author is particularly grateful to Gisle Aas H. Merijn Brand Sean Burke Chris Carey Alexandr Ciornii Chris David Jim Doble Thomas Drugeon Julius Duque Jeffrey Friedl Robert Gilmour Brian Gladman Jarkko Hietaniemi Adam Kennedy Mark Lawrence Andy Lester Alex Muntada Steve Peters Chris Skiscim Martin Thurn Gunnar Wolf Adam Woodbury "who by trained skill rescued life from such great billows and such thick darkness and moored it in so perfect a calm and in so brilliant a light" - Lucretius =head1 COPYRIGHT AND LICENSE Copyright (C) 2003-2018 Mark Shelor This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. L<perlartistic> =cut PK ��Z�J(�* �* MD5.pmnu �[��� package Digest::MD5; use strict; use vars qw($VERSION @ISA @EXPORT_OK); $VERSION = '2.55'; require Exporter; *import = \&Exporter::import; @EXPORT_OK = qw(md5 md5_hex md5_base64); eval { require Digest::base; push(@ISA, 'Digest::base'); }; if ($@) { my $err = $@; *add_bits = sub { die $err }; } eval { require XSLoader; XSLoader::load('Digest::MD5', $VERSION); }; if ($@) { my $olderr = $@; eval { # Try to load the pure perl version require Digest::Perl::MD5; Digest::Perl::MD5->import(qw(md5 md5_hex md5_base64)); unshift(@ISA, "Digest::Perl::MD5"); # make OO interface work }; if ($@) { # 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_handle); $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. =item @ctx = $md5->context =item $md5->context(@ctx) Saves or restores the internal state. When called with no arguments, returns a 3-element list: number of blocks processed, a 16-byte internal state buffer, then up to 63 bytes of unprocessed data. When passed those same arguments, restores the state. This is only useful for specialised operations. =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 arbitrarily. 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 $filename = shift || "/etc/passwd"; open (my $fh, '<', $filename) or die "Can't open '$filename': $!"; binmode($fh); $md5 = Digest::MD5->new; while (<$fh>) { $md5->add($_); } close($fh); print $md5->b64digest, " $filename\n"; Or we can use the addfile method for more efficient reading of the file: use Digest::MD5; my $filename = shift || "/etc/passwd"; open (my $fh, '<', $filename) or die "Can't open '$filename': $!"; binmode ($fh); print Digest::MD5->new->addfile($fh)->hexdigest, " $filename\n"; 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 (Unicode strings). 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::SHA>, 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 PK ��Z|�]� � SHA1.pmnu �[��� package Digest::SHA1; use strict; use vars qw($VERSION @ISA @EXPORT_OK); $VERSION = '2.13'; require Exporter; *import = \&Exporter::import; @EXPORT_OK = qw(sha1 sha1_hex sha1_base64 sha1_transform); require DynaLoader; @ISA=qw(DynaLoader); eval { require Digest::base; push(@ISA, 'Digest::base'); }; if ($@) { my $err = $@; *add_bits = sub { die $err }; } Digest::SHA1->bootstrap($VERSION); 1; __END__ =head1 NAME Digest::SHA1 - Perl interface to the SHA-1 algorithm =head1 SYNOPSIS # Functional style use Digest::SHA1 qw(sha1 sha1_hex sha1_base64); $digest = sha1($data); $digest = sha1_hex($data); $digest = sha1_base64($data); $digest = sha1_transform($data); # OO style use Digest::SHA1; $sha1 = Digest::SHA1->new; $sha1->add($data); $sha1->addfile(*FILE); $sha1_copy = $sha1->clone; $digest = $sha1->digest; $digest = $sha1->hexdigest; $digest = $sha1->b64digest; $digest = $sha1->transform; =head1 DESCRIPTION The C<Digest::SHA1> module allows you to use the NIST SHA-1 message digest algorithm from within Perl programs. The algorithm takes as input a message of arbitrary length and produces as output a 160-bit "fingerprint" or "message digest" of the input. In 2005, security flaws were identified in SHA-1, namely that a possible mathematical weakness might exist, indicating that a stronger hash function would be desirable. The L<Digest::SHA> module implements the stronger algorithms in the SHA family. The C<Digest::SHA1> module provide a procedural interface for simple use, as well as an object oriented interface that can handle messages of arbitrary length and which can read files directly. =head1 FUNCTIONS The following functions can be exported from the C<Digest::SHA1> module. No functions are exported by default. =over 4 =item sha1($data,...) This function will concatenate all arguments, calculate the SHA-1 digest of this "message", and return it in binary form. The returned string will be 20 bytes long. The result of sha1("a", "b", "c") will be exactly the same as the result of sha1("abc"). =item sha1_hex($data,...) Same as sha1(), but will return the digest in hexadecimal form. The length of the returned string will be 40 and it will only contain characters from this set: '0'..'9' and 'a'..'f'. =item sha1_base64($data,...) Same as sha1(), but will return the digest as a base64 encoded string. The length of the returned string will be 27 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 sha1 digests you might want to append the redundant string "=" to the result. =item sha1_transform($data) Implements the basic SHA1 transform on a 64 byte block. The $data argument and the returned $digest are in binary form. This algorithm is used in NIST FIPS 186-2 =back =head1 METHODS The object oriented interface to C<Digest::SHA1> is described in this section. After a C<Digest::SHA1> 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 $sha1 = Digest::SHA1->new The constructor returns a new C<Digest::SHA1> object which encapsulate the state of the SHA-1 message-digest algorithm. If called as an instance method (i.e. $sha1->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 $sha1->reset This is just an alias for $sha1->new. =item $sha1->clone This a copy of the $sha1 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 $sha1 = Digest::SHA1->new; while (<>) { $sha1->add($_); print "Line $.: ", $sha1->clone->hexdigest, "\n"; } =item $sha1->add($data,...) The $data provided as argument are appended to the message we calculate the digest for. The return value is the $sha1 object itself. All these lines will have the same effect on the state of the $sha1 object: $sha1->add("a"); $sha1->add("b"); $sha1->add("c"); $sha1->add("a")->add("b")->add("c"); $sha1->add("a", "b", "c"); $sha1->add("abc"); =item $sha1->addfile($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 $sha1 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 $sha1 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 $sha1 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 $sha1->add_bits($data, $nbits) =item $sha1->add_bits($bitstring) This implementation of SHA-1 only supports byte oriented input so you might only add bits as multiples of 8. If you need bit level support please consider using the C<Digest::SHA> module instead. The add_bits() method is provided here for compatibility with other digest implementations. See L<Digest> for description of the arguments that add_bits() take. =item $sha1->digest Return the binary digest for the message. The returned string will be 20 bytes long. Note that the C<digest> operation is effectively a destructive, read-once operation. Once it has been performed, the C<Digest::SHA1> object is automatically C<reset> and can be used to calculate another digest value. Call $sha1->clone->digest if you want to calculate the digest without reseting the digest state. =item $sha1->hexdigest Same as $sha1->digest, but will return the digest in hexadecimal form. The length of the returned string will be 40 and it will only contain characters from this set: '0'..'9' and 'a'..'f'. =item $sha1->b64digest Same as $sha1->digest, but will return the digest as a base64 encoded string. The length of the returned string will be 27 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 SHA-1 digests you might want to append the string "=" to the result. =back =head1 SEE ALSO L<Digest>, L<Digest::HMAC_SHA1>, L<Digest::SHA>, L<Digest::MD5> http://www.itl.nist.gov/fipspubs/fip180-1.htm http://en.wikipedia.org/wiki/SHA_hash_functions =head1 COPYRIGHT This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. Copyright 1999-2004 Gisle Aas. Copyright 1997 Uwe Hollerbach. =head1 AUTHORS Peter C. Gutmann, Uwe Hollerbach <uh@alumni.caltech.edu>, Gisle Aas <gisle@aas.no> =cut PK ��Z2��a�V �V SHA.pmnu �[��� PK ��Z�J(�* �* �V MD5.pmnu �[��� PK ��Z|�]� � ǁ SHA1.pmnu �[��� PK � ��
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