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hashcat/tools/test_modules/m26900.pm
2022-01-30 10:35:51 +01:00

87 lines
1.9 KiB
Perl

#!/usr/bin/env perl
##
## Author......: See docs/credits.txt
## License.....: MIT
##
use strict;
use warnings;
use Digest::SHA qw (sha384 sha384_hex hmac_sha384_hex);
sub module_constraints { [[8, 256], [64, 3000], [-1, -1], [-1, -1], [-1, -1]] }
sub module_generate_hash
{
my $word = shift;
my $salt = shift;
my $pkt_num = shift // int (rand (100000000));
my $engineID = shift // random_hex_string (26, 34);
# padding engineID: fill with zero
my $pad_len = 34 - length ($engineID);
my $engineID_orig = $engineID;
$engineID = join '', $engineID, "0" x $pad_len;
# make salt even if needed
if (length ($salt) % 2 == 1)
{
$salt = $salt . "8";
}
my $string1 = $word x 1048576;
$string1 = substr ($string1, 0, 1048576);
my $sha384_digest1 = sha384_hex ($string1);
my $buf = join '', $sha384_digest1, $engineID, $sha384_digest1;
my $sha384_digest2 = sha384 (pack ("H*", $buf));
my $digest = hmac_sha384_hex (pack ("H*", $salt), $sha384_digest2);
$digest = substr ($digest, 0, 64);
my $hash = "\$SNMPv3\$5\$" . $pkt_num . "\$" . $salt . "\$" . $engineID_orig . "\$" . $digest;
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, $idx + 1);
return unless length ($word) gt 0;
return unless substr ($hash, 0, 10) eq '$SNMPv3$5$';
my (undef, $signature, $version, $pkt_num, $salt, $engineID, $digest) = split '\$', $hash;
return unless defined $signature;
return unless defined $version;
return unless defined $pkt_num;
return unless defined $salt;
return unless defined $engineID;
return unless defined $digest;
my $word_packed = pack_if_HEX_notation ($word);
my $new_hash = module_generate_hash ($word_packed, $salt, $pkt_num, $engineID);
return ($new_hash, $word);
}
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