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136 lines
2.7 KiB
136 lines
2.7 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 Crypt::CBC;
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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 $type = shift // 1; #random_number (1, 3);
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my $iter = shift // random_number (10000, 20000);
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my $iv = shift // random_hex_string (32);
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my $enc = shift;
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my $kdf;
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if ($type == 1)
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{
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$kdf = Crypt::PBKDF2->new
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(
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hash_class => 'HMACSHA1',
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iterations => $iter,
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output_len => 32
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);
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}
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elsif ($type == 2)
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{
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$kdf = Crypt::PBKDF2->new
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(
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hasher => Crypt::PBKDF2->hasher_from_algorithm ('HMACSHA2', 256),
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iterations => $iter,
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output_len => 32
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);
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}
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elsif ($type == 3)
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{
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$kdf = Crypt::PBKDF2->new
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(
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hasher => Crypt::PBKDF2->hasher_from_algorithm ('HMACSHA2', 512),
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iterations => $iter,
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output_len => 32
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);
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}
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my $salt_bin = pack ("H*", $salt);
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my $key = $kdf->PBKDF2 ($salt_bin, $word);
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my $iv_bin = pack ("H*", $iv);
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my $data;
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if (defined $enc)
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{
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my $aes_cbc = Crypt::CBC->new ({
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cipher => "Crypt::Rijndael",
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iv => $iv_bin,
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key => $key,
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keysize => 32,
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literal_key => 1,
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header => "none",
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padding => "none"
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});
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my $enc_bin = pack ("H*", $enc);
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$data = $aes_cbc->decrypt ($enc_bin);
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if (substr ($data, 0, 12) ne "\x00" x 12)
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{
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$data = "\xff" x 16;
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}
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}
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else
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{
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$data = "\x00" x 16;
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}
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my $aes_cbc = Crypt::CBC->new ({
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cipher => "Crypt::Rijndael",
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iv => $iv_bin,
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key => $key,
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keysize => 32,
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literal_key => 1,
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header => "none",
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padding => "none"
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});
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my $enc_bin = $aes_cbc->encrypt ($data);
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my $hash = sprintf ("SQLCIPHER*%d*%d*%s*%s*%s", $type, $iter, unpack ("H*", $salt_bin), unpack ("H*", $iv_bin), unpack ("H*", $enc_bin));
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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, 9) eq 'SQLCIPHER';
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my ($signature, $type, $iter, $salt, $iv, $data) = split '\*', $hash;
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return unless defined $signature;
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return unless defined $type;
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return unless defined $iter;
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return unless defined $salt;
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return unless defined $iv;
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return unless defined $data;
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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, $type, $iter, $iv, $data);
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return ($new_hash, $word);
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}
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1;
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