File Coverage

blib/lib/RIPEMD160/MAC.pm

Criterion	Covered	Total	%
statement	30	54	55.5
branch	2	8	25.0
condition			n/a
subroutine	7	10	70.0
pod	0	6	0.0
total	39	78	50.0

package RIPEMD160::MAC;

use RIPEMD160 0.02;

use strict;
use vars qw($VERSION @ISA @EXPORT);

require Exporter;
@ISA = qw(Exporter);

# Items to export into callers namespace by default
@EXPORT = qw();
$VERSION = '0.1';

sub new {
    my($pkg, $key) = @_;

    my $self = {
	'key' => $key,
	'hash' => new RIPEMD160,
	'k_ipad' => chr(0x36) x 64,
	'k_opad' => chr(0x5c) x 64,
	};

    bless $self, $pkg;

    if (length($self->{'key'}) > 64) {
	$self->{'key'} = RIPEMD160->hash($self->{'key'});
    }

    $self->{'k_ipad'} ^= $self->{'key'};
    $self->{'k_opad'} ^= $self->{'key'};

    $self->{'hash'}->add($self->{'k_ipad'});

    return $self;
}

sub reset {
    my($self) = @_;

    $self->{'hash'}->reset();
    $self->{'k_ipad'} = chr(0x36) x 64;
    $self->{'k_opad'} = chr(0x5c) x 64;

    if (length($self->{'key'}) > 64) {
	$self->{'key'} = RIPEMD160->hash($self->{'key'});
    }

    $self->{'k_ipad'} ^= $self->{'key'};
    $self->{'k_opad'} ^= $self->{'key'};

    $self->{'hash'}->add($self->{'k_ipad'});

    return $self;
}

sub add {
    my($self, @data) = @_;

    $self->{'hash'}->add(@data);
}

sub addfile
{
    no strict 'refs';
    my ($self, $handle) = @_;
    my ($package, $file, $line) = caller;
    my ($data);

    if (!ref($handle)) {
	$handle = $package . "::" . $handle unless ($handle =~ /(\:\:|\')/);
    }
    while (read($handle, $data, 8192)) {
	$self->{'hash'}->add($data);
    }
}

sub mac {
    my($self) = @_;

    my($inner) = $self->{'hash'}->digest();

    my($outer) = RIPEMD160->hash($self->{'k_opad'}.$inner);

    $self->{'key'} = "";
    $self->{'k_ipad'} = "";
    $self->{'k_opad'} = "";

    return($outer);
}

sub hexmac {
    my($self) = @_;

    my($inner) = $self->{'hash'}->digest();

    my($outer) = RIPEMD160->hexhash($self->{'k_opad'}.$inner);

    $self->{'key'} = "";
    $self->{'k_ipad'} = "";
    $self->{'k_opad'} = "";

    return($outer);
}

1;
__END__