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HMAC_MD5.pm 0000644 00000002132 15051752107 0006260 0 ustar 00 package Digest::HMAC_MD5;
$VERSION="1.01";
use strict;
use Digest::MD5 qw(md5);
use Digest::HMAC qw(hmac);
# OO interface
use vars qw(@ISA);
@ISA=qw(Digest::HMAC);
sub new
{
my $class = shift;
$class->SUPER::new($_[0], "Digest::MD5", 64);
}
# Functional interface
require Exporter;
*import = \&Exporter::import;
use vars qw(@EXPORT_OK);
@EXPORT_OK=qw(hmac_md5 hmac_md5_hex);
sub hmac_md5
{
hmac($_[0], $_[1], \&md5, 64);
}
sub hmac_md5_hex
{
unpack("H*", &hmac_md5)
}
1;
__END__
=head1 NAME
Digest::HMAC_MD5 - Keyed-Hashing for Message Authentication
=head1 SYNOPSIS
# Functional style
use Digest::HMAC_MD5 qw(hmac_md5 hmac_md5_hex);
$digest = hmac_md5($data, $key);
print hmac_md5_hex($data, $key);
# OO style
use Digest::HMAC_MD5;
$hmac = Digest::HMAC_MD5->new($key);
$hmac->add($data);
$hmac->addfile(*FILE);
$digest = $hmac->digest;
$digest = $hmac->hexdigest;
$digest = $hmac->b64digest;
=head1 DESCRIPTION
This module provide HMAC-MD5 hashing.
=head1 SEE ALSO
L<Digest::HMAC>, L<Digest::MD5>, L<Digest::HMAC_SHA1>
=head1 AUTHOR
Gisle Aas <gisle@aas.no>
=cut
HMAC.pm 0000644 00000005511 15051752111 0005612 0 ustar 00 package Digest::HMAC;
$VERSION = "1.03";
use strict;
# OO interface
sub new
{
my($class, $key, $hasher, $block_size) = @_;
$block_size ||= 64;
$key = $hasher->new->add($key)->digest if length($key) > $block_size;
my $self = bless {}, $class;
$self->{k_ipad} = $key ^ (chr(0x36) x $block_size);
$self->{k_opad} = $key ^ (chr(0x5c) x $block_size);
$self->{hasher} = $hasher->new->add($self->{k_ipad});
$self;
}
sub reset
{
my $self = shift;
$self->{hasher}->reset->add($self->{k_ipad});
$self;
}
sub add { my $self = shift; $self->{hasher}->add(@_); $self; }
sub addfile { my $self = shift; $self->{hasher}->addfile(@_); $self; }
sub _digest
{
my $self = shift;
my $inner_digest = $self->{hasher}->digest;
$self->{hasher}->reset->add($self->{k_opad}, $inner_digest);
}
sub digest { shift->_digest->digest; }
sub hexdigest { shift->_digest->hexdigest; }
sub b64digest { shift->_digest->b64digest; }
# Functional interface
require Exporter;
*import = \&Exporter::import;
use vars qw(@EXPORT_OK);
@EXPORT_OK = qw(hmac hmac_hex);
sub hmac
{
my($data, $key, $hash_func, $block_size) = @_;
$block_size ||= 64;
$key = &$hash_func($key) if length($key) > $block_size;
my $k_ipad = $key ^ (chr(0x36) x $block_size);
my $k_opad = $key ^ (chr(0x5c) x $block_size);
&$hash_func($k_opad, &$hash_func($k_ipad, $data));
}
sub hmac_hex { unpack("H*", &hmac); }
1;
__END__
=head1 NAME
Digest::HMAC - Keyed-Hashing for Message Authentication
=head1 SYNOPSIS
# Functional style
use Digest::HMAC qw(hmac hmac_hex);
$digest = hmac($data, $key, \&myhash);
print hmac_hex($data, $key, \&myhash);
# OO style
use Digest::HMAC;
$hmac = Digest::HMAC->new($key, "Digest::MyHash");
$hmac->add($data);
$hmac->addfile(*FILE);
$digest = $hmac->digest;
$digest = $hmac->hexdigest;
$digest = $hmac->b64digest;
=head1 DESCRIPTION
HMAC is used for message integrity checks between two parties that
share a secret key, and works in combination with some other Digest
algorithm, usually MD5 or SHA-1. The HMAC mechanism is described in
RFC 2104.
HMAC follow the common C<Digest::> interface, but the constructor
takes the secret key and the name of some other simple C<Digest::>
as argument.
The hmac() and hmac_hex() functions and the Digest::HMAC->new() constructor
takes an optional $blocksize argument as well. The HMAC algorithm assumes the
digester to hash by iterating a basic compression function on blocks of data
and the $blocksize should match the byte-length of such blocks.
The default $blocksize is 64 which is suitable for the MD5 and SHA-1 digest
functions. For stronger algorithms the blocksize probably needs to be
increased.
=head1 SEE ALSO
L<Digest::HMAC_MD5>, L<Digest::HMAC_SHA1>
RFC 2104
=head1 AUTHORS
Graham Barr <gbarr@ti.com>, Gisle Aas <gisle@aas.no>
=cut
base.pm 0000644 00000003414 15051752111 0006014 0 ustar 00 package Digest::base;
use strict;
use vars qw($VERSION);
$VERSION = "1.16";
# subclass is supposed to implement at least these
sub new;
sub clone;
sub add;
sub digest;
sub reset {
my $self = shift;
$self->new(@_); # ugly
}
sub addfile {
my ($self, $handle) = @_;
my $n;
my $buf = "";
while (($n = read($handle, $buf, 4*1024))) {
$self->add($buf);
}
unless (defined $n) {
require Carp;
Carp::croak("Read failed: $!");
}
$self;
}
sub add_bits {
my $self = shift;
my $bits;
my $nbits;
if (@_ == 1) {
my $arg = shift;
$bits = pack("B*", $arg);
$nbits = length($arg);
}
else {
($bits, $nbits) = @_;
}
if (($nbits % 8) != 0) {
require Carp;
Carp::croak("Number of bits must be multiple of 8 for this algorithm");
}
return $self->add(substr($bits, 0, $nbits/8));
}
sub hexdigest {
my $self = shift;
return unpack("H*", $self->digest(@_));
}
sub b64digest {
my $self = shift;
require MIME::Base64;
my $b64 = MIME::Base64::encode($self->digest(@_), "");
$b64 =~ s/=+$//;
return $b64;
}
1;
__END__
=head1 NAME
Digest::base - Digest base class
=head1 SYNOPSIS
package Digest::Foo;
use base 'Digest::base';
=head1 DESCRIPTION
The C<Digest::base> class provide implementations of the methods
C<addfile> and C<add_bits> in terms of C<add>, and of the methods
C<hexdigest> and C<b64digest> in terms of C<digest>.
Digest implementations might want to inherit from this class to get
this implementations of the alternative I<add> and I<digest> methods.
A minimal subclass needs to implement the following methods by itself:
new
clone
add
digest
The arguments and expected behaviour of these methods are described in
L<Digest>.
=head1 SEE ALSO
L<Digest>
HMAC_SHA1.pm 0000644 00000002213 15051752112 0006363 0 ustar 00 package Digest::HMAC_SHA1;
$VERSION="1.03";
use strict;
use Digest::SHA qw(sha1);
use Digest::HMAC qw(hmac);
# OO interface
use vars qw(@ISA);
@ISA=qw(Digest::HMAC);
sub new
{
my $class = shift;
$class->SUPER::new($_[0], "Digest::SHA", 64); # Digest::SHA defaults to SHA-1
}
# Functional interface
require Exporter;
*import = \&Exporter::import;
use vars qw(@EXPORT_OK);
@EXPORT_OK=qw(hmac_sha1 hmac_sha1_hex);
sub hmac_sha1
{
hmac($_[0], $_[1], \&sha1, 64);
}
sub hmac_sha1_hex
{
unpack("H*", &hmac_sha1)
}
1;
__END__
=head1 NAME
Digest::HMAC_SHA1 - Keyed-Hashing for Message Authentication
=head1 SYNOPSIS
# Functional style
use Digest::HMAC_SHA1 qw(hmac_sha1 hmac_sha1_hex);
$digest = hmac_sha1($data, $key);
print hmac_sha1_hex($data, $key);
# OO style
use Digest::HMAC_SHA1;
$hmac = Digest::HMAC_SHA1->new($key);
$hmac->add($data);
$hmac->addfile(*FILE);
$digest = $hmac->digest;
$digest = $hmac->hexdigest;
$digest = $hmac->b64digest;
=head1 DESCRIPTION
This module provide HMAC-SHA-1 hashing.
=head1 SEE ALSO
L<Digest::HMAC>, L<Digest::SHA>, L<Digest::HMAC_MD5>
=head1 AUTHOR
Gisle Aas <gisle@aas.no>
=cut
file.pm 0000644 00000003304 15051752113 0006021 0 ustar 00 package Digest::file;
use strict;
use Exporter ();
use Carp qw(croak);
use Digest ();
use vars qw($VERSION @ISA @EXPORT_OK);
$VERSION = "1.16";
@ISA = qw(Exporter);
@EXPORT_OK = qw(digest_file_ctx digest_file digest_file_hex digest_file_base64);
sub digest_file_ctx {
my $file = shift;
croak("No digest algorithm specified") unless @_;
local *F;
open(F, "<", $file) || croak("Can't open '$file': $!");
binmode(F);
my $ctx = Digest->new(@_);
$ctx->addfile(*F);
close(F);
return $ctx;
}
sub digest_file {
digest_file_ctx(@_)->digest;
}
sub digest_file_hex {
digest_file_ctx(@_)->hexdigest;
}
sub digest_file_base64 {
digest_file_ctx(@_)->b64digest;
}
1;
__END__
=head1 NAME
Digest::file - Calculate digests of files
=head1 SYNOPSIS
# Poor mans "md5sum" command
use Digest::file qw(digest_file_hex);
for (@ARGV) {
print digest_file_hex($_, "MD5"), " $_\n";
}
=head1 DESCRIPTION
This module provide 3 convenience functions to calculate the digest
of files. The following functions are provided:
=over
=item digest_file( $file, $algorithm, [$arg,...] )
This function will calculate and return the binary digest of the bytes
of the given file. The function will croak if it fails to open or
read the file.
The $algorithm is a string like "MD2", "MD5", "SHA-1", "SHA-512".
Additional arguments are passed to the constructor for the
implementation of the given algorithm.
=item digest_file_hex( $file, $algorithm, [$arg,...] )
Same as digest_file(), but return the digest in hex form.
=item digest_file_base64( $file, $algorithm, [$arg,...] )
Same as digest_file(), but return the digest as a base64 encoded
string.
=back
=head1 SEE ALSO
L<Digest>
SHA.pm 0000644 00000053236 15053100725 0005524 0 ustar 00 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<$key> is the last argument
in the list.
It's important to note that the resulting string does B<not> contain
the padding characters typical of Base64 encodings. This omission is
deliberate, and is done to maintain compatibility with the family of
CPAN Digest modules. See L</"PADDING OF BASE64 DIGESTS"> for details.
=back
=head1 SEE ALSO
L<Digest>, L<Digest::SHA::PurePerl>
The Secure Hash Standard (Draft FIPS PUB 180-4) can be found at:
L<http://csrc.nist.gov/publications/drafts/fips180-4/Draft-FIPS180-4_Feb2011.pdf>
The Keyed-Hash Message Authentication Code (HMAC):
L<http://csrc.nist.gov/publications/fips/fips198/fips-198a.pdf>
=head1 AUTHOR
Mark Shelor <mshelor@cpan.org>
=head1 ACKNOWLEDGMENTS
The author is particularly grateful to
Gisle Aas
H. Merijn Brand
Sean Burke
Chris Carey
Alexandr Ciornii
Chris David
Jim Doble
Thomas Drugeon
Julius Duque
Jeffrey Friedl
Robert Gilmour
Brian Gladman
Jarkko Hietaniemi
Adam Kennedy
Mark Lawrence
Andy Lester
Alex Muntada
Steve Peters
Chris Skiscim
Martin Thurn
Gunnar Wolf
Adam Woodbury
"who by trained skill rescued life from such great billows and such thick
darkness and moored it in so perfect a calm and in so brilliant a light"
- Lucretius
=head1 COPYRIGHT AND LICENSE
Copyright (C) 2003-2018 Mark Shelor
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
L<perlartistic>
=cut
MD5.pm 0000644 00000025275 15053100725 0005500 0 ustar 00 package Digest::MD5;
use strict;
use vars qw($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
SHA1.pm 0000644 00000015663 15053100726 0005610 0 ustar 00 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