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66 lines
1.2 KiB
66 lines
1.2 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 MIME::Base64 qw (encode_base64 decode_base64);
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use Crypt::PBKDF2;
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sub module_constraints { [[0, 256], [16, 16], [-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 $pbkdf2 = Crypt::PBKDF2->new
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(
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hasher => Crypt::PBKDF2->hasher_from_algorithm ('HMACSHA1'),
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iterations => 10000,
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output_len => 32
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);
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my $base64 = encode_base64 ($salt . $pbkdf2->PBKDF2 ($salt, $word), "");
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my $hash = sprintf ("{PKCS5S2}%s", $base64);
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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, 9);
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return unless ($signature eq '{PKCS5S2}');
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my $hash = substr ($digest, 9);
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# base64 buf
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my $base64_decoded = decode_base64 ($hash);
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return if (length ($base64_decoded) != (16 + 32));
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my $salt = substr ($base64_decoded, 0, 16);
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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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1;
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