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package Crypt::PBKDF2::Hash::HMACSHA2;
# ABSTRACT: HMAC-SHA2 support for Crypt::PBKDF2 using Digest::SHA
our $VERSION = '0.142390'; # VERSION
our $AUTHORITY = 'cpan:ARODLAND'; # AUTHORITY
use Moose 1;
use Moose::Util::TypeConstraints;
use namespace::autoclean;
use Digest::SHA ();
with 'Crypt::PBKDF2::Hash';
subtype 'SHASize' => (
as 'Int',
where { $_ == 224 or $_ == 256 or $_ == 384 or $_ == 512 },
message { "$_ is an invalid number of bits for SHA-2" }
);
has 'sha_size' => (
is => 'ro',
isa => 'SHASize',
default => 256,
);
has '_hasher' => (
is => 'ro',
lazy_build => 1,
init_arg => undef,
);
sub _build__hasher {
my $self = shift;
my $shasize = $self->sha_size;
return Digest::SHA->can("hmac_sha$shasize");
}
sub hash_len {
my $self = shift;
return $self->sha_size() / 8;
}
sub generate {
my $self = shift; # ($data, $key)
return $self->_hasher->(@_);
}
sub to_algo_string {
my $self = shift;
return $self->sha_size;
}
sub from_algo_string {
my ($class, $str) = @_;
return $class->new( sha_size => $str );
}
__PACKAGE__->meta->make_immutable;
1;
__END__
=pod
=encoding UTF-8
=head1 NAME
Crypt::PBKDF2::Hash::HMACSHA2 - HMAC-SHA2 support for Crypt::PBKDF2 using Digest::SHA
=head1 VERSION
version 0.142390
=head1 DESCRIPTION
Uses L<Digest::SHA> C<hmac_sha256>/C<hmac_sha384>/C<hmac_sha512> to provide
the HMAC-SHA2 family of hashes for L<Crypt::PBKDF2>.
=head1 AUTHOR
Andrew Rodland <arodland@cpan.org>
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2014 by Andrew Rodland.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut
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