From b8e5daa58251ccb8d10a3b919938bd931ba5309b Mon Sep 17 00:00:00 2001
From: jsteube <jens.steube@gmail.com>
Date: Tue, 19 Feb 2019 13:43:14 +0100
Subject: [PATCH] Add -m 12900 unit test

---
 tools/test_modules/m12900.pm | 76 ++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 tools/test_modules/m12900.pm

diff --git a/tools/test_modules/m12900.pm b/tools/test_modules/m12900.pm
new file mode 100644
index 000000000..9d1971df9
--- /dev/null
+++ b/tools/test_modules/m12900.pm
@@ -0,0 +1,76 @@
+#!/usr/bin/env perl
+
+##
+## Author......: See docs/credits.txt
+## License.....: MIT
+##
+
+use strict;
+use warnings;
+
+use Crypt::PBKDF2;
+use Digest::HMAC qw (hmac_hex);
+use Digest::SHA qw (sha256);
+
+sub module_constraints { [[0, 255], [32, 32], [-1, -1], [-1, -1], [-1, -1]] }
+
+sub module_generate_hash
+{
+  my $word  = shift;
+  my $salt  = shift;
+  my $param = shift;
+
+  my $iterations = 4096;
+
+  my $salt2 = $salt . $salt;
+
+  if (defined $param)
+  {
+    $salt2 = $param;
+  }
+
+  my $pbkdf2 = Crypt::PBKDF2->new
+  (
+    hasher     => Crypt::PBKDF2->hasher_from_algorithm ('HMACSHA2', 256),
+    iterations => $iterations,
+    output_len => 32
+  );
+
+  my $salt_bin = pack ("H*", $salt);
+
+  my $tmp = $pbkdf2->PBKDF2 ($salt_bin, $word);
+
+  my $salt2_bin = pack ("H*", $salt2);
+
+  my $hash_hmac = hmac_hex ($salt2_bin, $tmp, \&sha256, 64);
+
+  my $hash = sprintf ("%s%s%s", $salt2, $hash_hmac, $salt);
+
+  return $hash;
+}
+
+sub module_verify_hash
+{
+  my $line = shift;
+
+  my ($hash_in, $word) = split ":", $line;
+
+  return unless defined $hash_in;
+  return unless defined $word;
+
+  return unless length $hash_in == 160;
+
+  my $param = substr ($hash_in, 0, 64);
+  my $salt  = substr ($hash_in, 128, 32);
+
+  return unless defined $salt;
+  return unless defined $word;
+
+  $word = pack_if_HEX_notation ($word);
+
+  my $new_hash = module_generate_hash ($word, $salt, $param);
+
+  return ($new_hash, $word);
+}
+
+1;