From a63dc50b0831cde4de56652dbe543fa5db96c56b Mon Sep 17 00:00:00 2001
From: Jens Steube <jens.steube@gmail.com>
Date: Sat, 1 Oct 2022 22:48:38 +0200
Subject: [PATCH] Prepare unit test for -m 29910

---
 tools/test_modules/m29910.pm | 134 +++++++++++++++++++++++++++++++++++
 1 file changed, 134 insertions(+)
 create mode 100644 tools/test_modules/m29910.pm

diff --git a/tools/test_modules/m29910.pm b/tools/test_modules/m29910.pm
new file mode 100644
index 000000000..e76177d83
--- /dev/null
+++ b/tools/test_modules/m29910.pm
@@ -0,0 +1,134 @@
+#!/usr/bin/env perl
+
+##
+## Author......: See docs/credits.txt
+## License.....: MIT
+##
+
+use strict;
+use warnings;
+
+use Crypt::Mode::ECB;
+use Crypt::PBKDF2;
+
+sub module_constraints { [[0, 256], [64, 64], [-1, -1], [-1, -1], [-1, -1]] }
+
+sub module_generate_hash
+{
+  my $word  = shift;
+  my $salt  = shift;
+  my $iv    = shift // random_hex_string (16);
+  my $ct    = shift;
+  my $iter  = shift // 100000;
+
+  # pbkdf2 part
+
+  my $pbkdf2 = Crypt::PBKDF2->new
+  (
+    hasher     => Crypt::PBKDF2->hasher_from_algorithm ('HMACSHA2', 256),
+    iterations => $iter,
+    output_len => 16
+  );
+
+  my $salt_bin = pack ("H*", $salt);
+
+  my $key = $pbkdf2->PBKDF2 ($salt_bin, $word);
+
+  my $aes = Crypt::Mode::ECB->new ('AES', 0);
+
+  my $iv_bin = pack ("H*", $iv);
+
+  my $ctr_len = 16;
+
+  my $ctr;
+
+  for (my $i = 0, my $counter = 1; $i < ($ctr_len >> 4); $i++, $counter++)
+  {
+    my $tmp_iv = $iv_bin . pack ("Q>", $counter);
+
+    $tmp_iv = $aes->encrypt ($tmp_iv, $key);
+
+    $ctr .= $tmp_iv;
+  }
+
+  my $pt_bin;
+
+  if (defined $ct)
+  {
+    my $ct_bin = pack ("H*", $ct);
+
+    $pt_bin = xor_len (substr ($ctr, 4, 4), $ct_bin, 4);
+
+    if ($pt_bin eq "\xd2\xc3\xb4\xa1")
+    {
+      # ok
+    }
+    else
+    {
+      $pt_bin = "\xff\xff\xff\xff";
+    }
+  }
+  else
+  {
+    $pt_bin = "\xd2\xc3\xb4\xa1";
+  }
+
+  my $ct_bin = xor_len (substr ($ctr, 4, 4), $pt_bin, 4);
+
+  my $hash = sprintf ('$encdv-pbkdf2$1$1$%s$%s$32$%s$%d', unpack ("H*", $iv_bin), unpack ("H*", $ct_bin), unpack ("H*", $salt_bin), $iter);
+
+  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, $idx + 1);
+
+  return unless substr ($hash, 0, 14) eq '$encdv-pbkdf2$';
+
+  my (undef, $signature, $version, $algo_id, $iv, $ct, $salt_len, $salt, $iter) = split '\$', $hash;
+
+  return unless defined $signature;
+  return unless defined $version;
+  return unless defined $algo_id;
+  return unless defined $iv;
+  return unless defined $ct;
+  return unless defined $salt_len;
+  return unless defined $salt;
+  return unless defined $iter;
+
+  return unless ($version == 1);
+  return unless ($algo_id == 1);
+  return unless ($salt_len == 32);
+
+  my $word_packed = pack_if_HEX_notation ($word);
+
+  my $new_hash = module_generate_hash ($word_packed, $salt, $iv, $ct, $iter);
+
+  return ($new_hash, $word);
+}
+
+sub xor_len
+{
+  my $in1 = shift;
+  my $in2 = shift;
+  my $len = shift;
+
+  my $out;
+
+  for (my $i = 0; $i < $len; $i++)
+  {
+    $out .= chr (ord (substr ($in1, $i, 1)) ^ ord (substr ($in2, $i, 1)));
+  }
+
+  return $out;
+}
+
+1;