Unit-test for new hash-mode -m 31300 SNTP-MS

tools/test_modules/m31300.pm

@@ -0,0 +1,60 @@
+#!/usr/bin/env perl
+
+##
+## Author......: See docs/credits.txt
+## License.....: MIT
+##
+
+use strict;
+use warnings;
+
+use Digest::MD4 qw (md4 md4_hex);
+use Digest::MD5 qw (md5 md5_hex);
+use Text::Iconv;
+
+sub module_constraints { [[0, 256], [96, 96], [0, 27], [96, 96], [-1, -1]] }
+
+sub module_generate_hash
+{
+  my $word = shift;
+  my $salt = shift;
+
+  my $salt_bin = pack ("H*", $salt);
+
+  my $converter = Text::Iconv->new('utf8', 'UTF-16LE');
+
+  my $digest = md5_hex (md4 ($converter->convert ($word)) . $salt_bin);
+
+  my $hash = sprintf ('$sntp-ms$%s$%s', $digest, unpack ("H*", $salt_bin));
+
+  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);
+
+  my (undef, $signature, $digest, $salt) = split '\$', $hash;
+
+  return unless defined $signature;
+  return unless defined $digest;
+  return unless defined $salt;
+
+  return unless $signature eq 'sntp-ms';
+  return unless length $salt == 96;
+
+  my $word_packed = pack_if_HEX_notation ($word);
+
+  my $new_hash = module_generate_hash ($word_packed, $salt);
+
+  return ($new_hash, $word);
+}
+
+1;