The Decrypt filter allows to decrypt a encrypted file.
This filter makes use of Zend_Filter_Decrypt. It supports the
Mcrypt and OpenSSL extensions from
PHP. Please read the related section for details about how to set the
options for decryption and which options are supported.
This filter supports one additional option which can be used to save the decrypted file with another filename. Set the filename option to change the filename where the decrypted file will be stored. If you suppress this option, the decrypted file will overwrite the original encrypted file.
Example 418. Using the Decrypt filter with Mcrypt
<?php
$upload = new Zend_File_Transfer_Adapter_Http();
// Adds a filter to decrypt the uploaded encrypted file
// with mcrypt and the key mykey
$upload->addFilter('Decrypt',
array('adapter' => 'mcrypt', 'key' => 'mykey'));
Example 419. Using the Decrypt filter with OpenSSL
<?php
$upload = new Zend_File_Transfer_Adapter_Http();
// Adds a filter to decrypt the uploaded encrypted file
// with openssl and the provided keys
$upload->addFilter('Decrypt',
array('adapter' => 'openssl',
'private' => '/path/to/privatekey.pem',
'envelope' => '/path/to/envelopekey.pem'));