Add -m 4800 unit test

tools/test_modules/m04800.pm

@@ -0,0 +1,83 @@
+#!/usr/bin/env perl
+
+##
+## Author......: See docs/credits.txt
+## License.....: MIT
+##
+
+use strict;
+use warnings;
+
+use Digest::MD5 qw (md5_hex);
+
+sub module_constraints { [[0, 255], [-1, -1], [0, 38], [-1, -1], [-1, -1]] } # 38 = 55 - 16 - 1
+
+sub get_random_md5chap_salt
+{
+  my $salt_buf = random_bytes (16);
+
+  my $salt = unpack ("H*", $salt_buf);
+
+  $salt .= ":";
+
+  $salt .= unpack ("H*", random_bytes (1));
+
+  return $salt;
+}
+
+sub module_generate_hash
+{
+  my $word = shift;
+  my $salt = shift;
+
+  if (length $salt == 0)
+  {
+    $salt = get_random_md5chap_salt ();
+  }
+
+  my $index = rindex ($salt, ":");
+
+  my $saltx  = substr ($salt, 0, $index);
+  my $salt_bin  = pack ("H*", $saltx);
+  my $chap_sign = substr ($salt, $index + 1);
+  my $chap_sign_bin = pack ("H*", $chap_sign);
+
+  my $hash_buf = md5_hex ($chap_sign_bin . $word . $salt_bin);
+
+  my $hash = sprintf ("%s:%s", $hash_buf, $salt);
+
+  return $hash;
+}
+
+sub module_verify_hash
+{
+  my $line = shift;
+
+  my $index1 = index ($line, ":");
+
+  return if $index1 < 1;
+
+  my $index2 = index ($line, ":", $index1 + 1);
+
+  return if $index2 < 1;
+
+  my $index3 = index ($line, ":", $index2 + 1);
+
+  return if $index3 < 1;
+
+  my $salt = substr ($line, $index1 + 1, $index3 - $index1 - 1);
+
+  my $word = substr ($line, $index3 + 1);
+
+  return unless defined $salt;
+  return unless defined $word;
+
+  $word = pack_if_HEX_notation ($word);
+
+  my $new_hash = module_generate_hash ($word, $salt);
+
+  return ($new_hash, $word);
+}
+
+1;
+