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142 lines
2.8 KiB
Perl
142 lines
2.8 KiB
Perl
#!/usr/bin/env perl
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##
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## Author......: See docs/credits.txt
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## License.....: MIT
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##
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use strict;
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use warnings;
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use Crypt::DES;
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use Crypt::DES_EDE3;
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use Digest::SHA qw (sha1);
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use Digest::HMAC qw (hmac);
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sub module_constraints { [[0, 256], [40, 40], [-1, -1], [-1, -1], [-1, -1]] }
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sub module_generate_hash
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{
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my $word = shift;
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my $global_salt = shift;
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my $entry_salt = shift // random_hex_string (40);
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my $ct = shift;
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my $global_salt_bin = pack ("H*", $global_salt);
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my $entry_salt_bin = pack ("H*", $entry_salt);
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my $hp = sha1 ($global_salt_bin . $word);
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my $pes = substr ($entry_salt_bin . ("\x00" x 20), 0, 20);
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my $chp = sha1 ($hp . $entry_salt_bin);
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my $k1 = hmac ($pes . $entry_salt_bin, $chp, \&sha1, 64);
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my $tk = hmac ($pes, $chp, \&sha1, 64);
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my $k2 = hmac ($tk . $entry_salt_bin, $chp, \&sha1, 64);
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my $k = $k1 . $k2;
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my $key = substr ($k, 0, 24);
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my $iv = substr ($k, 32, 8);
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my $pt;
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if (defined $ct)
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{
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my $ct_bin = pack ("H*", $ct);
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my $ede3 = Crypt::DES_EDE3->new ($key);
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my $ct1_bin = substr ($ct_bin, 0, 8);
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my $ct2_bin = substr ($ct_bin, 8, 8);
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my $pt1 = $ede3->decrypt ($ct1_bin);
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$pt1 = exclusive_or ($pt1, $iv);
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my $pt2 = $ede3->decrypt ($ct2_bin);
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$pt2 = exclusive_or ($pt2, $ct1_bin);
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$pt = $pt1 . $pt2;
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if ($pt ne "password-check\x02\x02")
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{
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$pt = "\xff" x 16;
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}
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}
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else
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{
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$pt = "password-check\x02\x02";
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}
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my $ede3 = Crypt::DES_EDE3->new ($key);
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my $pt1 = substr ($pt, 0, 8);
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my $pt2 = substr ($pt, 8, 8);
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$pt1 = exclusive_or ($pt1, $iv);
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my $ct1_bin = $ede3->encrypt ($pt1);
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$pt2 = exclusive_or ($pt2, $ct1_bin);
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my $ct2_bin = $ede3->encrypt ($pt2);
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my $ct_bin = $ct1_bin . $ct2_bin;
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my $hash = sprintf ('$mozilla$*3DES*%s*%s*%s', unpack ("H*", $global_salt_bin), unpack ("H*", $entry_salt_bin), unpack ("H*", $ct_bin));
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return $hash;
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}
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sub module_verify_hash
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{
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my $line = shift;
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my $idx = index ($line, ':');
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return unless $idx >= 0;
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my $hash = substr ($line, 0, $idx);
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my $word = substr ($line, $idx + 1);
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return unless substr ($hash, 0, 9) eq '$mozilla$';
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my ($signature, $type, $global_salt, $entry_salt, $ct) = split '\*', $hash;
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return unless defined $signature;
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return unless defined $type;
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return unless defined $global_salt;
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return unless defined $entry_salt;
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return unless defined $ct;
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return unless $type eq '3DES';
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my $word_packed = pack_if_HEX_notation ($word);
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my $new_hash = module_generate_hash ($word_packed, $global_salt, $entry_salt, $ct);
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return ($new_hash, $word);
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}
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sub exclusive_or
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{
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my $in1 = shift;
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my $in2 = shift;
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my $out = "";
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for (my $i = 0; $i < length ($in1); $i++) # $i < $len
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{
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$out .= chr (ord (substr ($in1, $i, 1)) ^ ord (substr ($in2, $i, 1)));
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}
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return $out;
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}
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1;
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