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hashcat/tools/test_modules/m26610.pm
2023-02-26 13:41:13 +01:00

113 lines
2.9 KiB
Perl

#!/usr/bin/env perl
##
## Author......: See docs/credits.txt
## License.....: MIT
##
use strict;
use warnings;
use Crypt::PBKDF2;
use Crypt::AuthEnc::GCM;
use MIME::Base64 qw (decode_base64 encode_base64);
sub module_constraints { [[8, 256], [64, 64], [-1, -1], [-1, -1], [-1, -1]] }
sub module_generate_hash
{
my $word = shift;
my $salt = shift;
my $iv = shift // random_hex_string (32);
my $ct = shift;
my $ct_min_len = 30;
my $ct_max_len = 64;
my $kdf = Crypt::PBKDF2->new
(
hasher => Crypt::PBKDF2->hasher_from_algorithm ('HMACSHA2', 256),
iterations => 10000,
output_len => 32
);
my $salt_bin = pack ("H*", $salt);
my $key = $kdf->PBKDF2 ($salt_bin, $word);
my $iv_bin = pack ("H*", $iv);
my $pt;
if (defined $ct)
{
my $ct_bin = pack ("H*", $ct);
my $data_bin = $ct_bin;
my $aes = Crypt::AuthEnc::GCM->new ("AES", $key, $iv_bin);
$pt = $aes->decrypt_add ($data_bin);
}
else
{
# generate plaintext
# TODO now the data is all ASCII 'a', would be better to have it mimic the same structure as the reference data:
# [{"type":"HD Key Tree","data":{"mnemonic":[112,97,121,109,101,110,116,32,117,112,115,101,116,32,109,101,116,97,108,32,99,104,97,112,116,101,114,32,114,117,110,32,97,100,109,105,116,32,109,101,97,115,117,114,101,32,114,101,109,105,110,100,32,115,117,112,112,108,121,32,104,111,112,101,32,101,110,101,109,121,32,104,101,100,103,101,104,111,103],"numberOfAccounts":1,"hdPath":"m/44'/60'/0'/0"}}]
# generated from tools/2hashcat_tests/metamask2hashcat-test.py
$pt = "a" x ($ct_min_len + int (rand ($ct_max_len - $ct_min_len)) + 1);
}
my $aes = Crypt::AuthEnc::GCM->new ("AES", $key, $iv_bin);
my $ct_bin = $aes->encrypt_add ($pt);
my $hash = sprintf ('$metamask-short$%s$%s$%s', encode_base64 ($salt_bin, ""), encode_base64 ($iv_bin, ""), encode_base64 ($ct_bin, ""));
return $hash;
}
sub module_verify_hash
{
my $line = shift;
my $idx = index ($line, ':');
return unless $idx >= 0;
my $hash = substr ($line, 0, $idx);
my $word = substr ($line, $idx + 1);
return unless substr ($hash, 0, 10) eq '$metamask-short$';
my (undef, $signature, $salt, $iv, $ct) = split '\$', $hash;
return unless defined $signature;
return unless defined $salt;
return unless defined $iv;
return unless defined $ct;
my $salt_bin = decode_base64 ($salt);
my $iv_bin = decode_base64 ($iv);
my $ct_bin = decode_base64 ($ct);
return unless length $salt_bin == 32;
return unless length $iv_bin == 16;
my $ct_len = length ($ct_bin);
my $ct_min_len = 30;
my $ct_max_len = 3136;
return unless ($ct_len >= $ct_min_len && $ct_len <= $ct_max_len);
my $word_packed = pack_if_HEX_notation ($word);
my $new_hash = module_generate_hash ($word_packed, unpack ("H*", $salt_bin), unpack ("H*", $iv_bin), unpack ("H*", $ct_bin));
return ($new_hash, $word);
}
1;