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101 lines
2.1 KiB
101 lines
2.1 KiB
#!/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 Digest::SHA qw (sha1);
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use Encode;
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sub module_constraints { [[0, 16], [-1, -1], [0, 16], [-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 $iv = shift || random_hex_string (40);
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my $enc_key = shift || random_hex_string (random_number (1, 1500));
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my $alias = shift || "test";
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if (length $iv)
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{
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$iv = pack ("H*", $iv);
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}
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if (length $enc_key)
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{
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$enc_key = pack ("H*", $enc_key);
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}
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my $word_utf16be = encode ("UTF-16BE", $word);
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my $digest = sha1 ($word_utf16be . $iv);
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my $DER1 = substr ($digest, 0, 1);
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my $DER2 = substr ($digest, 6, 14);
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my @enc_key_data = split "", $enc_key;
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my $enc_key_data_length = scalar @enc_key_data;
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my @key_data = ();
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for (my $i = 0; $i < scalar $enc_key_data_length; $i += 20)
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{
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my @digest_data = split "", $digest;
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for (my $j = 0; $j < 20; $j++)
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{
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last if (($i + $j) >= $enc_key_data_length);
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$key_data[$i + $j] = $enc_key_data[$i + $j] ^ $digest_data[$j];
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}
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$digest = sha1 ($word_utf16be . $digest);
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}
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my $key = join "", @key_data;
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$digest = sha1 ($word_utf16be . $key);
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my $hash = sprintf ("\$jksprivk\$*%s*%s*%s*%s*%s*%s", uc unpack ("H*", $digest), uc unpack ("H*", $iv), uc unpack ("H*", $enc_key), uc unpack ("H*", $DER1), uc unpack ("H*", $DER2), $alias);
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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 $line = shift;
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my ($hash, $word) = split (':', $line);
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return unless defined $hash;
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return unless defined $word;
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my @data = split ('\*', $hash);
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return unless scalar @data == 7;
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my $signature = shift @data;
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return unless ($signature eq '$jksprivk$');
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my $checksum = shift @data;
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my $iv = shift @data;
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my $enc_key = shift @data;
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my $DER1 = shift @data;
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my $DER2 = shift @data;
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my $alias = shift @data;
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my $word_packed = pack_if_HEX_notation ($word);
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my $new_hash = module_generate_hash ($word_packed, $iv, $enc_key, $alias);
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return ($new_hash, $word);
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}
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1;
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