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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 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 $iterations = shift // 5000;
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my $encrypted = shift;
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my $salt_bin = pack ("H*", $salt);
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my $hasher = Crypt::PBKDF2->hasher_from_algorithm ('HMACSHA1');
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my $pbkdf2 = Crypt::PBKDF2->new (
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hasher => $hasher,
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iterations => $iterations,
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output_len => 32
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);
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my $key = $pbkdf2->PBKDF2 ($salt_bin, $word);
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my $cipher = Crypt::CBC->new ({
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key => $key,
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cipher => "Crypt::Rijndael",
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iv => $salt_bin,
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literal_key => 1,
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header => "none",
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keysize => 32
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});
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my $data = qq|{
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"guid" : "00000000-0000-0000-0000-000000000000",
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"sharedKey" : "00000000-0000-0000-0000-000000000000",
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"options" : {"pbkdf2_iterations":$iterations,"fee_policy":0,"html5_notifications":false,"logout_time":600000,"tx_display":0,"always_keep_local_backup":false}|;
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unless (defined $encrypted)
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{
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$encrypted = unpack ("H*", $cipher->encrypt ($data));
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}
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my $hash = sprintf ("\$blockchain\$v2\$%d\$%s\$%s", $iterations, length ($salt . $encrypted) / 2, $salt . $encrypted);
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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 $line = shift;
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my ($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 (undef, $signature, $version, $iterations, $data_len, $data) = split '\$', $hash;
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return unless ($signature eq "blockchain");
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return unless ($version eq "v2");
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return unless (($data_len * 2) == length $data);
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my $salt = substr ($data, 0, 32);
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my $encrypted = substr ($data, 32);
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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, $iterations, $encrypted);
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return ($new_hash, $word);
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}
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1;
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