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86 lines
1.6 KiB
86 lines
1.6 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 Crypt::PBKDF2;
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use Digest::SHA qw (sha1);
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use Digest::HMAC qw (hmac_hex);
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sub module_constraints { [[8, 63], [-1, -1], [-1, -1], [-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 $macap = shift;
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my $macsta = shift;
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my $essid = shift;
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if (!defined ($macap))
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{
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$macap = unpack ("H*", random_bytes (6));
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}
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if (!defined ($macsta))
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{
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$macsta = unpack ("H*", random_bytes (6));
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}
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if (!defined ($essid))
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{
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$essid = unpack ("H*", random_bytes (random_number (0, 32) & 0x1e));
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}
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my $pbkdf2 = Crypt::PBKDF2->new
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(
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hash_class => 'HMACSHA1',
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iterations => 4096,
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output_len => 32,
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);
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my $essid_bin = pack ("H*", $essid);
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my $pmk = $pbkdf2->PBKDF2 ($essid_bin, $word);
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my $macap_bin = pack ("H*", $macap);
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my $macsta_bin = pack ("H*", $macsta);
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my $data = "PMK Name" . $macap_bin . $macsta_bin;
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my $pmkid = hmac_hex ($data, $pmk, \&sha1);
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my $hash = sprintf ("%s*%s*%s*%s", substr ($pmkid, 0, 32), $macap, $macsta, $essid);
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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 == 4;
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my (undef, $macap, $macsta, $essid) = @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, undef, $macap, $macsta, $essid);
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return ($new_hash, $word);
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}
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1;
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