File Coverage

blib/lib/Crypt/Argon2.pm

Criterion	Covered	Total	%
statement	20	21	95.2
branch	5	6	83.3
condition	14	15	93.3
subroutine	5	6	83.3
pod	2	2	100.0
total	46	50	92.0

package Crypt::Argon2;
$Crypt::Argon2::VERSION = '0.018';
use strict;
use warnings;

use Exporter 5.57 'import';
our @EXPORT_OK = qw/
	argon2_raw argon2_pass argon2_verify
	argon2id_raw argon2id_pass argon2id_verify
	argon2i_raw argon2i_pass argon2i_verify
	argon2d_raw argon2_pass argon2_verify
	argon2_needs_rehash argon2_types/;
use XSLoader;
XSLoader::load(__PACKAGE__, __PACKAGE__->VERSION || 0);

our $type_regex = qr/argon2(?:i|d|id)/;

my %multiplier = (
	k => 1,
	M => 1024,
	G => 1024 * 1024,
);

my $regex = qr/ ^ \$ (argon2(?:i|d|id)) \$ v=(\d+) \$ m=(\d+), t=(\d+), p=(\d+) \$ ([^\$]+) \$ (.*) $ /x;

sub argon2_needs_rehash {
	my ($encoded, $type, $t_cost, $m_cost, $parallelism, $output_length, $salt_length) = @_;
	$m_cost =~ s/ \A (\d+) ([kMG]) \z / $1 * $multiplier{$2} * 1024 /xmse;
	$m_cost /= 1024;
	my ($name, $version, $m_got, $t_got, $parallel_got, $salt, $hash) = $encoded =~ $regex or return 1;
	return 1 if $name ne $type or $version != 19 or $t_got != $t_cost or $m_got != $m_cost or $parallel_got != $parallelism;
	return 1 if int(3 / 4 * length $salt) != $salt_length or int(3 / 4 * length $hash) != $output_length;
	return 0;
}

sub argon2_types {
	return qw/argon2id argon2i argon2d/;
}

1;

# ABSTRACT: Perl interface to the Argon2 key derivation functions

__END__