Add upstream

wp-content/plugins/updraftplus/example-decrypt.php

@@ -0,0 +1,43 @@
+<?php
+// @codingStandardsIgnoreStart
+/*
+To dump the decrypted file using the given key on stdout, call:
+
+rijndael_decrypt_file('../path/to/file.crypt' , 'mykey');
+
+Thus, here are the easy instructions:
+
+1) Add a line like the above into this PHP file (not inside these comments, but outside)
+e.g.
+rijndael_decrypt_file('/home/myself/myfile.crypt' , 'MYKEY');
+
+2) Run this file (and make sure that includes/Rijndael.php is available, if you are moving this file around)
+e.g. 
+php /home/myself/example-decrypt.php >output.sql.gz
+
+3) You may then want to gunzip the resulting file to have a standard SQL file.
+e.g.
+gunzip output.sql.gz
+
+*/
+// @codingStandardsIgnoreEnd
+
+/**
+ * An example of how to decrypt a file
+ *
+ * @param String $file Full path to file to decrypt
+ * @param String $key  Key or salting to be used
+ */
+function rijndael_decrypt_file($file, $key) {
+
+	include_once(dirname(__FILE__).'/vendor/phpseclib/phpseclib/phpseclib/Crypt/Rijndael.php');
+
+	$rijndael = new Crypt_Rijndael();
+
+	$rijndael->setKey($key);
+
+	$ciphertext = file_get_contents($file);
+
+	print $rijndael->decrypt($ciphertext);
+
+}