diff --git a/tools/test_modules/m00121.pm b/tools/test_modules/m00121.pm
new file mode 100644
index 000000000..a850ad87d
--- /dev/null
+++ b/tools/test_modules/m00121.pm
@@ -0,0 +1,44 @@
+#!/usr/bin/env perl
+
+##
+## Author......: See docs/credits.txt
+## License.....: MIT
+##
+
+use strict;
+use warnings;
+
+use Digest::SHA qw (sha1_hex);
+
+sub module_constraints { [[0, 255], [0, 255], [0, 55], [0, 55], [0, 55]] }
+
+sub module_generate_hash
+{
+  my $word = shift;
+  my $salt = shift;
+
+  my $digest = sha1_hex (lc($salt) . $word);
+
+  my $hash = sprintf ("%s:%s", $digest, $salt);
+
+  return $hash;
+}
+
+sub module_verify_hash
+{
+  my $line = shift;
+
+  my ($hash, $salt, $word) = split (':', $line);
+
+  return unless defined $hash;
+  return unless defined $salt;
+  return unless defined $word;
+
+  my $word_packed = pack_if_HEX_notation ($word);
+
+  my $new_hash = module_generate_hash ($word_packed, $salt);
+
+  return ($new_hash, $word);
+}
+
+1;
diff --git a/tools/test_modules/m00122.pm b/tools/test_modules/m00122.pm
new file mode 100644
index 000000000..785247879
--- /dev/null
+++ b/tools/test_modules/m00122.pm
@@ -0,0 +1,48 @@
+#!/usr/bin/env perl
+
+##
+## Author......: See docs/credits.txt
+## License.....: MIT
+##
+
+use strict;
+use warnings;
+
+use Digest::SHA qw (sha1_hex);
+
+sub module_constraints { [[0, 255], [8, 8], [0, 55], [8, 8], [8, 55]] }
+
+sub module_generate_hash
+{
+  my $word = shift;
+  my $salt = shift;
+
+  my $salt_bin = pack ("H*", $salt);
+
+  my $digest = sha1_hex ($salt_bin . $word);
+
+  my $hash = sprintf ("%s%s", $salt, $digest);
+
+  return $hash;
+}
+
+sub module_verify_hash
+{
+  my $line = shift;
+
+  my ($hash, $word) = split (':', $line);
+
+  my $salt = substr($hash, 0, 8);
+
+  return unless defined $hash;
+  return unless defined $salt;
+  return unless defined $word;
+
+  my $word_packed = pack_if_HEX_notation ($word);
+
+  my $new_hash = module_generate_hash ($word_packed, $salt);
+
+  return ($new_hash, $word);
+}
+
+1;
diff --git a/tools/test_modules/m00125.pm b/tools/test_modules/m00125.pm
new file mode 100644
index 000000000..764aca3c6
--- /dev/null
+++ b/tools/test_modules/m00125.pm
@@ -0,0 +1,50 @@
+#!/usr/bin/env perl
+
+##
+## Author......: See docs/credits.txt
+## License.....: MIT
+##
+
+use strict;
+use warnings;
+
+use Digest::SHA qw (sha1_hex);
+
+sub module_constraints { [[0, 255], [8, 8], [0, 55], [8, 8], [8, 55]] }
+
+sub module_generate_hash
+{
+  my $word = shift;
+  my $salt = shift;
+
+  my $signature = "01";
+
+  my $salt_bin = pack ("H*", $salt . $signature);
+
+  my $digest = sha1_hex ($salt_bin . $word);
+
+  my $hash = sprintf ("%s%s%s", $salt, $signature, $digest);
+
+  return $hash;
+}
+
+sub module_verify_hash
+{
+  my $line = shift;
+
+  my ($hash, $word) = split (':', $line);
+
+  my $salt = substr($hash, 0, 8);
+
+  return unless defined $hash;
+  return unless defined $salt;
+  return unless defined $word;
+
+  my $word_packed = pack_if_HEX_notation ($word);
+
+  my $new_hash = module_generate_hash ($word_packed, $salt);
+
+  return ($new_hash, $word);
+}
+
+1;