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58 lines
1.0 KiB
58 lines
1.0 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::Perl::MD5;
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sub module_constraints { [[0, 64], [-1, -1], [0, 55], [-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 $salt = shift;
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my $end = shift // "0" x 32;
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my $md5 = Digest::Perl::MD5->new;
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my $length = length ($word);
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$md5->{_data} = $word ^ ("\x5c" x $length);
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$md5->{_data} .= "\x5c" x (64 - $length);
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$md5->add ();
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my $digest = unpack ("H*", pack ('V4', @{$md5->{_state}}));
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my $hash = sprintf ("{CRAM-MD5}%s%s", $digest, $end);
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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 $line = shift;
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my ($digest, $word) = split (':', $line);
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return unless defined $digest;
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return unless defined $word;
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my $signature = substr ($digest, 0, 10);
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return unless ($signature eq "{CRAM-MD5}");
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my $end = substr ($digest, 42);
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my $word_packed = pack_if_HEX_notation ($word);
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my $new_hash = module_generate_hash ($word_packed, "", $end);
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return ($new_hash, $word);
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}
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1;
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