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77 lines
1.4 KiB
77 lines
1.4 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 MIME::Base64 qw (encode_base64);
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sub module_constraints { [[0, 256], [0, 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 $iter = shift // 10000;
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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 => $iter
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);
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my $hash_buf = encode_base64 ($pbkdf2->PBKDF2 ($salt, $word), "");
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my $hash = sprintf ("pbkdf2_sha256\$%i\$%s\$%s", $iter, $salt, $hash_buf);
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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 $line = shift;
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# Django (PBKDF2-SHA256)
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return unless (substr ($line, 0, 14) eq 'pbkdf2_sha256$');
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# get hash
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my $index1 = index ($line, "\$", 14);
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return if $index1 < 1;
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my $index2 = index ($line, "\$", $index1 + 1);
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# iter
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my $iter = substr ($line, 14, $index1 - 14);
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# salt
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my $salt = substr ($line, $index1 + 1, $index2 - $index1 - 1);
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# digest
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$index1 = index ($line, ":", $index2 + 1);
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return if $index1 < 1;
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my $word = substr ($line, $index1 + 1);
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return unless defined $salt;
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return unless defined $iter;
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return unless defined $word;
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$word = pack_if_HEX_notation ($word);
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my $new_hash = module_generate_hash ($word, $salt, $iter);
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return ($new_hash, $word);
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}
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1;
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