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85 lines
2.0 KiB
85 lines
2.0 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 decode_base64);
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sub module_constraints { [[0, 256], [1, 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 // 10000; # or 100000 default but probably too high for tests
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my $iter2 = shift // 2;
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my $kdf1 = 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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output_len => 32
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);
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my $kdf2 = Crypt::PBKDF2->new
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(
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hasher => Crypt::PBKDF2->hasher_from_algorithm ('HMACSHA2', 256),
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iterations => $iter2,
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output_len => 32
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);
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my $email = $salt;
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my $digest1 = $kdf1->PBKDF2 ($email, $word);
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my $digest2 = $kdf2->PBKDF2 ($word, $digest1); # position of $word switched !
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my $hash = sprintf ("\$bitwarden\$2*%d*%d*%s*%s", $iter, $iter2, encode_base64 ($email, ""), encode_base64 ($digest2, ""));
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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 $idx = index ($line, ':');
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return unless $idx >= 0;
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my $hash = substr ($line, 0, $idx);
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my $word = substr ($line, $idx + 1);
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return unless substr ($hash, 0, 12) eq '$bitwarden$2';
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my ($type, $iter, $iter2, $salt_base64, $hash_base64) = split ('\*', $hash);
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return unless defined ($type);
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return unless defined ($iter);
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return unless defined ($salt_base64);
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return unless defined ($hash_base64);
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$type = substr ($type, 11);
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return unless ($type eq '2');
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return unless ($iter =~ m/^[0-9]{1,7}$/);
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return unless ($iter2 =~ m/^[0-9]{1,7}$/);
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return unless ($salt_base64 =~ m/^[a-zA-Z0-9+\/=]+$/);
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return unless ($hash_base64 =~ m/^[a-zA-Z0-9+\/=]+$/);
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my $salt = decode_base64 ($salt_base64);
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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, $iter2);
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return ($new_hash, $word);
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}
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1;
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