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59 lines
981 B
59 lines
981 B
#!/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::HMAC qw (hmac_hex);
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use Digest::SHA qw (sha1);
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sub module_constraints { [[0, 256], [32, 256], [0, 55], [32, 32], [-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 $hash_buf = hmac_hex ($salt, $word, \&sha1);
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my $hash = sprintf ("%s:%s", unpack ("H*", $salt), $hash_buf);
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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 $index1 = index ($line, ":");
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return if $index1 < 1;
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my $salt = substr ($line, 0, $index1);
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$salt = pack ("H*", $salt);
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my $rest = substr ($line, $index1 + 1);
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my $index2 = index ($rest, ":");
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return if $index2 < 1;
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my $word = substr ($rest, $index2 + 1);
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return unless defined $salt;
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return unless defined $word;
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$word = pack_if_HEX_notation ($word);
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my $new_hash = module_generate_hash ($word, $salt);
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return ($new_hash, $word);
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}
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1;
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