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114 lines
3.4 KiB
114 lines
3.4 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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sub module_constraints { [[0, 16], [-1, -1], [-1, -1], [-1, -1], [0, 16]] }
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my @PE_CONST = (
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0, 49345, 49537, 320, 49921, 960, 640, 49729, 50689, 1728, 1920, 51009, 1280, 50625, 50305, 1088,
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52225, 3264, 3456, 52545, 3840, 53185, 52865, 3648, 2560, 51905, 52097, 2880, 51457, 2496, 2176, 51265,
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55297, 6336, 6528, 55617, 6912, 56257, 55937, 6720, 7680, 57025, 57217, 8000, 56577, 7616, 7296, 56385,
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5120, 54465, 54657, 5440, 55041, 6080, 5760, 54849, 53761, 4800, 4992, 54081, 4352, 53697, 53377, 4160,
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61441, 12480, 12672, 61761, 13056, 62401, 62081, 12864, 13824, 63169, 63361, 14144, 62721, 13760, 13440, 62529,
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15360, 64705, 64897, 15680, 65281, 16320, 16000, 65089, 64001, 15040, 15232, 64321, 14592, 63937, 63617, 14400,
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10240, 59585, 59777, 10560, 60161, 11200, 10880, 59969, 60929, 11968, 12160, 61249, 11520, 60865, 60545, 11328,
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58369, 9408, 9600, 58689, 9984, 59329, 59009, 9792, 8704, 58049, 58241, 9024, 57601, 8640, 8320, 57409,
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40961, 24768, 24960, 41281, 25344, 41921, 41601, 25152, 26112, 42689, 42881, 26432, 42241, 26048, 25728, 42049,
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27648, 44225, 44417, 27968, 44801, 28608, 28288, 44609, 43521, 27328, 27520, 43841, 26880, 43457, 43137, 26688,
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30720, 47297, 47489, 31040, 47873, 31680, 31360, 47681, 48641, 32448, 32640, 48961, 32000, 48577, 48257, 31808,
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46081, 29888, 30080, 46401, 30464, 47041, 46721, 30272, 29184, 45761, 45953, 29504, 45313, 29120, 28800, 45121,
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20480, 37057, 37249, 20800, 37633, 21440, 21120, 37441, 38401, 22208, 22400, 38721, 21760, 38337, 38017, 21568,
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39937, 23744, 23936, 40257, 24320, 40897, 40577, 24128, 23040, 39617, 39809, 23360, 39169, 22976, 22656, 38977,
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34817, 18624, 18816, 35137, 19200, 35777, 35457, 19008, 19968, 36545, 36737, 20288, 36097, 19904, 19584, 35905,
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17408, 33985, 34177, 17728, 34561, 18368, 18048, 34369, 33281, 17088, 17280, 33601, 16640, 33217, 32897, 16448
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);
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sub PE_encode
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{
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my $word_str = shift;
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my $word_str_len = length ($word_str);
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my @word = split ('', $word_str, $word_str_len);
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my @scratch = (0) x 16;
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my @target = (0) x 16;
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my $hash = 17;
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for (my $i = 0; $i < 5; $i++)
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{
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for (my $j = 0; $j < $word_str_len; $j++)
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{
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my $idx = 15 - ($j % 16);
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$scratch[$idx] ^= ord ($word[$j]);
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}
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for (my $j = 0; $j < 16; $j += 2)
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{
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for (my $k = 15; $k >= 0; $k--)
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{
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$hash = (($hash & 0xffff) >> 8 ^ $PE_CONST[($hash & 0xff)] ^ $PE_CONST[$scratch[$k]]);
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}
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$scratch[$j] = $hash & 0xff;
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$scratch[$j+1] = ($hash >> 8) & 0xff;
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}
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}
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for (my $i = 0; $i < 16; $i++)
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{
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my $low = $scratch[$i] & 0x7f;
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if ($low >= 65 && $low <= 90)
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{
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$target[$i] = $low;
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}
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elsif ($low >= 97 && $low <= 122)
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{
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$target[$i] = $low;
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}
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else
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{
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$target[$i] = ((($scratch[$i] & 0xff) >> 4) + 0x61) & 0xff;
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}
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$target[$i] = chr ($target[$i]);
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}
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return join ('', @target);
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}
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sub module_generate_hash
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{
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my $word = shift;
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my $hash = PE_encode ($word);
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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 $word_packed = pack_if_HEX_notation ($word);
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my $new_hash = module_generate_hash ($word_packed);
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return ($new_hash, $word);
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}
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1;
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