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package Crypt::Digest::SHAKE;
use strict;
use warnings;
our $VERSION = '0.079_007';
use Carp;
$Carp::Internal{(__PACKAGE__)}++;
use CryptX;
sub addfile {
my ($self, $file) = @_;
my $handle;
if (ref(\$file) eq 'SCALAR') { #filename
open($handle, "<", $file) || croak "FATAL: cannot open '$file': $!";
binmode($handle);
}
else { #handle
$handle = $file
}
croak "FATAL: invalid handle" unless defined $handle;
my $n;
my $buf = "";
while (($n = read($handle, $buf, 32*1024))) {
$self->add($buf)
}
croak "FATAL: read failed: $!" unless defined $n;
return $self;
}
sub CLONE_SKIP { 1 } # prevent cloning
1;
=pod
=head1 NAME
Crypt::Digest::SHAKE - Hash functions SHAKE128, SHAKE256 from SHA3 family
=head1 SYNOPSIS
use Crypt::Digest::SHAKE
$d = Crypt::Digest::SHAKE->new(128);
$d->add('any data');
$d->addfile('filename.dat');
$d->addfile(*FILEHANDLE);
$part1 = $d->done(100); # 100 raw bytes
$part2 = $d->done(100); # another 100 raw bytes
#...
=head1 DESCRIPTION
Provides an interface to the SHA3's sponge function SHAKE.
=head1 METHODS
=head2 new
$d = Crypt::Digest::SHA3-SHAKE->new($num);
# $num ... 128 or 256
=head2 clone
$d->clone();
=head2 reset
$d->reset();
=head2 add
$d->add('any data');
#or
$d->add('any data', 'more data', 'even more data');
=head2 addfile
$d->addfile('filename.dat');
#or
$d->addfile(*FILEHANDLE);
=head2 done
$result_raw = $d->done($len);
# can be called multiple times
=head1 SEE ALSO
=over
=item * L<CryptX|CryptX>, L<Crypt::Digest|Crypt::Digest>
=item * L<http://en.wikipedia.org/wiki/SHA-3|http://en.wikipedia.org/wiki/SHA-3>
=back
=cut
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