Add module and unit test for hash-mode 12000

tools/test_modules/m12000.pm

@@ -0,0 +1,80 @@
+#!/usr/bin/env perl
+
+##
+## Author......: See docs/credits.txt
+## License.....: MIT
+##
+
+use strict;
+use warnings;
+
+use MIME::Base64 qw (encode_base64 decode_base64);
+use Crypt::PBKDF2;
+
+sub module_constraints { [[0, 255], [0, 64], [0, 55], [0, 64], [-1, -1]] }
+
+sub module_generate_hash
+{
+  my $word  = shift;
+  my $salt  = shift;
+  my $iter  = shift // random_number (100, 10000);
+
+  my $kdf = Crypt::PBKDF2->new
+  (
+    hash_class => 'HMACSHA1',
+    iterations => $iter,
+    output_len => 16
+  );
+
+  my $key = $kdf->PBKDF2 ($salt, $word);
+
+  my $key_b64 = encode_base64 ($key, "");
+
+  my $salt_b64 = encode_base64 ($salt, "");
+
+  my $hash = sprintf ("sha1:%i:%s:%s", $iter, $salt_b64, $key_b64);
+
+  return $hash;
+}
+
+sub module_verify_hash
+{
+  my $line = shift;
+
+  next unless (substr ($line, 0, 5) eq 'sha1:');
+
+  # iterations
+  my $index1 = index ($line, ":", 5);
+
+  next if $index1 < 1;
+
+  my $iter = substr ($line, 5, $index1 - 5);
+
+  # salt
+
+  my $index2 = index ($line, ":", $index1 + 1);
+
+  return if $index2 < 1;
+
+  my $salt = substr ($line, $index1 + 1,  $index2 - $index1 - 1);
+
+  $salt = decode_base64 ($salt);
+
+  # end of digest
+
+  $index1 = index ($line, ":", $index2 + 1);
+
+  return if $index1 < 1;
+
+  # word / hash
+
+  my $word = substr ($line, $index1 + 1);
+
+  my $word_packed = pack_if_HEX_notation ($word);
+
+  my $new_hash = module_generate_hash ($word_packed, $salt, $iter);
+
+  return ($new_hash, $word);
+}
+
+1;