package Crypt::PBKDF2::Hash::HMACSHA2;
# ABSTRACT: HMAC-SHA2 support for Crypt::PBKDF2 using Digest::SHA
our $VERSION = '0.160410'; # VERSION
our $AUTHORITY = 'cpan:ARODLAND'; # AUTHORITY
use Moo 2;
use strictures 2;
use namespace::autoclean;
use Digest::SHA ();
use Type::Tiny;
use Types::Standard qw(Enum);
with 'Crypt::PBKDF2::Hash';
has 'sha_size' => (
is => 'ro',
isa => Type::Tiny->new(
name => 'SHASize',
parent => Enum[qw( 224 256 384 512 )],
display_name => 'valid number of bits for SHA-2',
),
default => 256,
);
has '_hasher' => (
is => 'lazy',
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 );
}
1;
__END__
=pod
=encoding UTF-8
=head1 NAME
Crypt::PBKDF2::Hash::HMACSHA2 - HMAC-SHA2 support for Crypt::PBKDF2 using Digest::SHA
=head1 VERSION
version 0.160410
=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) 2016 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