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package SL::Auth::Password;
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use strict;
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use Carp;
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sub hash {
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my ($class, %params) = @_;
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if (!$params{algorithm}) {
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$params{algorithm} = 'SHA256S';
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$params{fallback_algorithm} = 'MD5';
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}
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my $salt = $params{algorithm} =~ m/S$/ ? $params{login} : '';
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if ($params{algorithm} =~ m/^SHA256/) {
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if (eval { require Digest::SHA; 1 }) {
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return '{' . $params{algorithm} . '}' . Digest::SHA::sha256_hex($salt . $params{password});
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} elsif ($params{fallback_algorithm}) {
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return $class->hash(%params, algorithm => $params{fallback_algorithm});
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} else {
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die 'Digest::SHA is not available';
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}
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} elsif ($params{algorithm} =~ m/^SHA1/) {
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if (eval { require Digest::SHA; 1 }) {
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return '{' . $params{algorithm} . '}' . Digest::SHA::sha1_hex($salt . $params{password});
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} elsif (eval { require Digest::SHA1; 1 }) {
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return '{' . $params{algorithm} . '}' . Digest::SHA1::sha1_hex($salt . $params{password});
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} elsif ($params{fallback_algorithm}) {
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return $class->hash(%params, algorithm => $params{fallback_algorithm});
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} else {
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die 'Neither Digest::SHA nor Digest::SHA1 is available';
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}
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} elsif ($params{algorithm} =~ m/^MD5/) {
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require Digest::MD5;
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return '{' . $params{algorithm} . '}' . Digest::MD5::md5_hex($salt . $params{password});
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} elsif ($params{algorithm} eq 'CRYPT') {
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return '{CRYPT}' . crypt($params{password}, substr($params{login}, 0, 2));
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} else {
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croak 'Unsupported hash algorithm ' . $params{algorithm};
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}
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}
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sub hash_if_unhashed {
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my ($class, %params) = @_;
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my ($algorithm, $password) = $class->parse($params{password}, 'NONE');
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return $params{password} unless $algorithm eq 'NONE';
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if ($params{look_up_algorithm}) {
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my $stored_password = $params{auth}->get_stored_password($params{login});
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my ($stored_algorithm) = $class->parse($stored_password);
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$params{algorithm} = $stored_algorithm;
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}
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return $class->hash(%params);
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}
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sub parse {
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my ($class, $password, $default_algorithm) = @_;
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return ($1, $2) if $password =~ m/^\{ ([^\}]+) \} (.+)/x;
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return ($default_algorithm || 'CRYPT', $password);
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}
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1;
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