From 46210dd177440507a12dbdb8aebf0e183e89d25a Mon Sep 17 00:00:00 2001
From: Gabriele Gristina <matrix@users.noreply.github.com>
Date: Thu, 10 Dec 2020 03:11:31 +0100
Subject: [PATCH] Added test module

---
 tools/test_modules/m21501.pm | 74 ++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 tools/test_modules/m21501.pm

diff --git a/tools/test_modules/m21501.pm b/tools/test_modules/m21501.pm
new file mode 100644
index 000000000..f636f2e71
--- /dev/null
+++ b/tools/test_modules/m21501.pm
@@ -0,0 +1,74 @@
+#!/usr/bin/env perl
+
+##
+## Author......: See docs/credits.txt
+## License.....: MIT
+##
+
+use strict;
+use warnings;
+
+use MIME::Base64 qw (encode_base64 decode_base64);
+use Crypt::PBKDF2;
+use Digest::SHA qw (sha512);
+use Encode;
+
+sub module_constraints { [[0, 256], [16, 16], [-1, -1], [-1, -1], [-1, -1]] }
+
+sub module_generate_hash
+{
+  my $word  = shift;
+  my $salt  = shift;
+
+  my $kdf = Crypt::PBKDF2->new
+  (
+    hash_class => 'HMACSHA1',
+    iterations => 1000,
+    output_len => 1024
+  );
+
+  my $salt_b64 = encode_base64 ($salt, "");
+
+  my $key = $kdf->PBKDF2 ($salt, $word);
+
+  my $key_b64 = encode_base64 (sha512 ($key), "");
+
+  my $hash = sprintf ("\$solarwinds\$1\$%s\$%s", $salt_b64, $key_b64);
+
+  return $hash;
+}
+
+sub module_verify_hash
+{
+  my $line = shift;
+
+  my ($hash, $word) = split (':', $line);
+
+  return unless defined $hash;
+  return unless defined $word;
+
+  my @data = split ('\$', $hash);
+
+  return unless scalar @data == 5;
+
+  shift @data;
+
+  my $signature = shift @data;
+  my $sig_dec   = shift @data;
+  my $salt      = shift @data;
+  my $digest    = shift @data;
+
+  return unless ($signature eq "solarwinds");
+  return unless ($sig_dec eq "1");
+
+  return unless length ($salt) == 24;
+  return unless length ($digest) == 88;
+
+  my $word_packed = pack_if_HEX_notation ($word);
+
+  my $new_hash = module_generate_hash ($word_packed, $salt);
+
+  return ($new_hash, $word);
+}
+
+1;