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81 lines
1.4 KiB
Perl
81 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 MIME::Base64 qw (encode_base64 decode_base64);
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use Crypt::PBKDF2;
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sub module_constraints { [[0, 256], [0, 256], [-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 $iter = shift // random_number (100, 10000);
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my $kdf = Crypt::PBKDF2->new
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(
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hash_class => 'HMACSHA1',
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iterations => $iter,
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output_len => 16
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);
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my $key = $kdf->PBKDF2 ($salt, $word);
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my $key_b64 = encode_base64 ($key, "");
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my $salt_b64 = encode_base64 ($salt, "");
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my $hash = sprintf ("sha1:%i:%s:%s", $iter, $salt_b64, $key_b64);
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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 $line = shift;
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return unless (substr ($line, 0, 5) eq 'sha1:');
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# iterations
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my $index1 = index ($line, ":", 5);
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return if $index1 < 1;
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my $iter = substr ($line, 5, $index1 - 5);
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# salt
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my $index2 = index ($line, ":", $index1 + 1);
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return if $index2 < 1;
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my $salt = substr ($line, $index1 + 1, $index2 - $index1 - 1);
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$salt = decode_base64 ($salt);
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# end of digest
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$index1 = index ($line, ":", $index2 + 1);
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return if $index1 < 1;
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# word / hash
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my $word = substr ($line, $index1 + 1);
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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, $iter);
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return ($new_hash, $word);
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}
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1;
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