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78 lines
1.6 KiB
78 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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sub module_constraints { [[0, 256], [32, 32], [-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 // 15;
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my $iv = shift // "0" x 32;
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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 => (1 << $iter) + 32,
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output_len => 32
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);
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my $salt_bin = pack ("H*", $salt);
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my $hash = $pbkdf2->PBKDF2 ($salt_bin, $word);
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my $hash_final = substr ($hash, 0, 8)
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^ substr ($hash, 8, 8)
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^ substr ($hash, 16, 8)
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^ substr ($hash, 24, 8);
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my $tmp_hash = sprintf ('$rar5$16$%s$%d$%s$8$%s', $salt, $iter, $iv, unpack ("H*", $hash_final));
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return $tmp_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 == 8;
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shift @data;
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my $signature = shift @data;
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my $salt_len = shift @data;
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my $salt_buf = shift @data;
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my $iterations = shift @data;
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my $iv = shift @data;
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my $pswcheck_len = shift @data;
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my $pswcheck = shift @data;
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return unless ($signature eq "rar5");
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return unless ($salt_len == 16);
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return unless ($pswcheck_len == 8);
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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_buf, $iterations, $iv);
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return ($new_hash, $word);
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}
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1;
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