1 package SL::Auth::Password;
12 my ($class, %params) = @_;
14 # PBKDF2::Tiny expects data to be in octets. Therefore we must
15 # encode everything we hand over (login, password) to UTF-8.
17 # This hash method uses a random hash and not just the user's login
18 # for its salt. This is due to the official recommendation that at
19 # least eight octets of random data should be used. Therefore we
20 # must store the salt together with the hashed password. The format
23 # {PBKDF2}salt-in-hex:hash-in-hex
27 if ((defined $params{stored_password}) && ($params{stored_password} =~ m/^\{PBKDF2\} ([0-9a-f]+) :/x)) {
28 $salt = (split m{:}, Encode::encode('utf-8', $1), 2)[0];
31 my @login = map { ord } split m{}, Encode::encode('utf-8', $params{login});
32 my @random = map { int(rand(256)) } (0..16);
34 $salt = join '', map { sprintf '%02x', $_ } @login, @random;
37 my $hashed = "{PBKDF2}${salt}:" . join('', map { sprintf '%02x', ord } split m{}, PBKDF2::Tiny::derive('SHA-256', $salt, Encode::encode('utf-8', $params{password})));
43 my ($class, %params) = @_;
45 $params{algorithm} ||= 'PBKDF2';
47 my $salt = $params{algorithm} =~ m/S$/ ? $params{login} : '';
49 if ($params{algorithm} =~ m/^SHA256/) {
50 return '{' . $params{algorithm} . '}' . Digest::SHA::sha256_hex($salt . $params{password});
52 } elsif ($params{algorithm} =~ m/^SHA1/) {
53 return '{' . $params{algorithm} . '}' . Digest::SHA::sha1_hex($salt . $params{password});
55 } elsif ($params{algorithm} =~ m/^MD5/) {
56 return '{' . $params{algorithm} . '}' . Digest::MD5::md5_hex($salt . $params{password});
58 } elsif ($params{algorithm} eq 'CRYPT') {
59 return '{CRYPT}' . crypt($params{password}, substr($params{login}, 0, 2));
61 } elsif ($params{algorithm} =~ m/^PBKDF2/) {
62 return $class->hash_pkkdf2(password => $params{password}, stored_password => $params{stored_password});
65 croak 'Unsupported hash algorithm ' . $params{algorithm};
69 sub hash_if_unhashed {
70 my ($class, %params) = @_;
72 my ($algorithm, $password) = $class->parse($params{password}, 'NONE');
74 return $params{password} unless $algorithm eq 'NONE';
76 if ($params{look_up_algorithm}) {
77 my $stored_password = $params{auth}->get_stored_password($params{login});
78 my ($stored_algorithm) = $class->parse($stored_password);
79 $params{algorithm} = $stored_algorithm;
82 return $class->hash(%params);
86 my ($class, $password, $default_algorithm) = @_;
88 return ($1, $2) if $password =~ m/^\{ ([^\}]+) \} (.+)/x;
89 return ($default_algorithm || 'CRYPT', $password);