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66 lines
1.1 KiB
66 lines
1.1 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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sub module_constraints { [[0, 256], [1, 16], [0, 13], [16, 16], [-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 $salt = shift;
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my $digest = androidpin_hash ($word, $salt);
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my $hash = sprintf ("%s:%s", $digest, $salt);
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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, $salt, $word) = split (':', $line);
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return unless defined $hash;
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return unless defined $salt;
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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, $salt);
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return ($new_hash, $word);
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}
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sub androidpin_hash
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{
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my $word = shift;
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my $salt = shift;
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my $w = sprintf ("%d%s%s", 0, $word, $salt);
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my $digest = sha1 ($w);
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for (my $i = 1; $i < 1024; $i++)
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{
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$w = $digest . sprintf ("%d%s%s", $i, $word, $salt);
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$digest = sha1 ($w);
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}
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my ($A, $B, $C, $D, $E) = unpack ("N5", $digest);
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return sprintf ("%08x%08x%08x%08x%08x", $A, $B, $C, $D, $E);
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}
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1;
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