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71 lines
1.4 KiB
Perl
71 lines
1.4 KiB
Perl
#!/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 MIME::Base64 qw (encode_base64 decode_base64);
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sub module_constraints { [[0, 255], [1, 15], [-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 $iterations = shift // 1000;
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my $out_len = shift // 24;
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my $pbkdf2 = Crypt::PBKDF2->new
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(
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hasher => Crypt::PBKDF2->hasher_from_algorithm ('HMACSHA2', 256),
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iterations => $iterations,
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output_len => $out_len
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);
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my $digest = encode_base64 ($pbkdf2->PBKDF2 ($salt, $word), "");
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my $base64_salt = encode_base64 ($salt, "");
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my $hash = sprintf ("sha256:%i:%s:%s", $iterations, $base64_salt, $digest);
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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 @data = split (':', $digest);
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return unless scalar(@data) == 4;
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my $signature = shift @data;
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return unless ($signature eq 'sha256');
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my $iterations = int (shift @data);
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my $salt = decode_base64 (shift @data);
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my $hash = decode_base64 (shift @data);
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my $out_len = length ($hash);
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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, $iterations, $out_len);
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return ($new_hash, $word);
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}
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1;
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