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hashcat/tools/test_modules/m28700.pm
2022-06-20 15:19:01 +02:00

89 lines
2.1 KiB
Perl

#!/usr/bin/env perl
##
## Author......: See docs/credits.txt
## License.....: MIT
##
use strict;
use warnings;
use Digest::SHA qw (sha256);
use Digest::HMAC qw (hmac hmac_hex);
sub module_constraints { [[0, 252], [8, 8], [0, 51], [8, 8], [-1, -1]] }
sub module_generate_hash
{
my $word = shift;
my $salt = shift; # date
my $region = shift // "us-east-1";
my $service = shift // "s3";
my $canonical = shift // random_hex_string (64);
my $date = 0;
my $longdate = 0;
if (length ($salt) == 8)
{
$date = $salt;
$longdate = sprintf ("%sT000000Z", $date);
}
if (length ($salt) == 16)
{
$longdate = $salt;
$date = substr ($salt, 0, 8);
}
my $kPassKey = sprintf ("AWS4%s", $word);
my $kDate = hmac ($date, $kPassKey, \&sha256, 64);
my $kRegion = hmac ($region, $kDate, \&sha256, 64);
my $kService = hmac ($service, $kRegion, \&sha256, 64);
my $kSigning = hmac ("aws4_request", $kService, \&sha256, 64);
my $stringtosign = sprintf ("AWS4-HMAC-SHA256\n%s\n%s/%s/%s/aws4_request\n%s", $longdate, $date, $region, $service, $canonical);
my $digest = hmac_hex ($stringtosign, $kSigning, \&sha256, 64);
my $hash = sprintf ("\$AWS-Sig-v4\$0\$%s\$%s\$%s\$%s\$%s", $longdate, $region, $service, $canonical, $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 ($hash, 0, 14) eq '$AWS-Sig-v4$0$';
my (undef, $signature, $version, $salt, $region, $service, $canonical, $digest) = split '\$', $hash;
return unless defined $signature;
return unless defined $version;
return unless defined $salt; # date
return unless defined $region;
return unless defined $service;
return unless defined $canonical;
return unless defined $digest;
return unless length ($salt) == 16;
my $word_packed = pack_if_HEX_notation ($word);
my $new_hash = module_generate_hash ($word_packed, $salt, $region, $service, $canonical);
return ($new_hash, $word);
}
1;