mirror of
https://github.com/hashcat/hashcat.git
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135 lines
3.2 KiB
Perl
135 lines
3.2 KiB
Perl
#!/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::AuthEnc::GCM;
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use MIME::Base64 qw (decode_base64 encode_base64);
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use Crypt::KeyDerivation ':all';
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sub module_constraints { [[0, 256], [64, 64], [-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 $hkdf_salt = shift;
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my $hkdf_key = shift // random_hex_string (64);
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my $iterations = shift // 100000;
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my $iv = shift // (random_number (0,1) ? random_hex_string (32) : random_hex_string (24));
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my $ct = shift;
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my $tag = shift;
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my $email = shift // "31800\@hashcat.net";
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my $hkdf_salt_bin = pack ("H*", $hkdf_salt);
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my $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 => $iterations,
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output_len => 32
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);
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my $password_key = $kdf->PBKDF2 ($hkdf_salt_bin, $word);
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my $hkdf_key_bin = pack ("H*", $hkdf_key);
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my $muk = xor_len ($password_key, $hkdf_key_bin, 32);
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my $pt;
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my $iv_bin = pack ("H*", $iv);
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if (defined $ct)
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{
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my $ct_bin = pack ("H*", $ct);
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my $tag_bin = pack ("H*", $tag);
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my $aes = Crypt::AuthEnc::GCM->new ("AES", $muk, $iv_bin);
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$pt = $aes->decrypt_add ($ct_bin);
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my $result_tag = $aes->decrypt_done ($tag_bin);
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if ($result_tag == 1)
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{
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## correct password
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}
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else
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{
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$pt = "{'key_ops': ['decrypt', 'encrypt'], 'kty': 'oct', 'alg': 'A256GCM', 'k': 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx=', 'ext': True, 'kid': 'xxxxxxxxxxxxxxxxxxxxxxxxxx'}";
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}
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}
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else
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{
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$pt = "{'key_ops': ['decrypt', 'encrypt'], 'kty': 'oct', 'alg': 'A256GCM', 'k': 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx=', 'ext': True, 'kid': 'xxxxxxxxxxxxxxxxxxxxxxxxxx'}";
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}
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my $aes = Crypt::AuthEnc::GCM->new ("AES", $muk, $iv_bin);
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my $ct_bin = $aes->encrypt_add ($pt);
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my $tag_bin = $aes->encrypt_done ();
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## so far so good
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my $hash = sprintf ('$mobilekeychain$%s$%s$%s$%u$%s$%s$%s', $email, unpack ("H*", $hkdf_salt_bin), unpack ("H*", $hkdf_key_bin), $iterations, unpack ("H*", $iv_bin), unpack ("H*", $ct_bin), unpack ("H*", $tag_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, 16) eq '$mobilekeychain$';
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my (undef, $signature, $email, $hkdf_salt, $hkdf_key, $iterations, $iv, $ct, $tag) = split '\$', $hash;
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return unless defined $signature;
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return unless defined $email;
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return unless defined $hkdf_salt;
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return unless defined $hkdf_key;
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return unless defined $iterations;
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return unless defined $iv;
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return unless defined $ct;
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return unless defined $tag;
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my $word_packed = pack_if_HEX_notation ($word);
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my $new_hash = module_generate_hash ($word_packed, $hkdf_salt, $hkdf_key, $iterations, $iv, $ct, $tag, $email);
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return ($new_hash, $word);
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}
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sub xor_len
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{
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my $in1 = shift;
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my $in2 = shift;
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my $len = shift;
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my $out;
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for (my $i = 0; $i < $len; $i++)
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{
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$out .= chr (ord (substr ($in1, $i, 1)) ^ ord (substr ($in2, $i, 1)));
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}
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return $out;
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}
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1;
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