Encrypt/decrypt using block ciphers — Zend Framework 2 2.0.7 documentation. This website is built using zend-expressive and it runs on PHP 7. Hardware AES: can we have a decryption implementation only? With Extra Attack, can I grapple an opponent and attack with offhand dagger? Is it possible to improve reflexes for gaming? How to protect sensitive data in PHP using Zend Framework 2. ![]() During a recent project, the client requested that uploaded files be encrypted for security reasons. As I already had the uploaded code ready and tested I just needed to add some extra encryption capability to the code. As earlier I’d encountered Zends wonderful class, I decided to go with it and use the Zend_Filter_Encrypt and Zend_Filter_Decrypt to accomplish the work. ![]() The Zend_Filter component provides a set of common useful data filters, among which are the encryption filters. Although my project was not developed in Zend, I could easily integrate the required classes in the code. Note that Zend has a great upload library,, that lets you easily manage file uploading and also encryption, but as I already had the upload code tested, I decided to just add the encryption part. Downloading the Zend framework As the following code requires the Zend framework make sure you it first. For this code I used Zend 1.11.0 Full version. You can also download the required files at the end of this post. Zend Framework Encrypt Decrypt Php FileWhich Zend framework files do I need You only need some selected files to make the below code work. The following is a list of files and directories that I used from the ‘ZendFramework-1.11.0 library Zend’ directory. The top three in the list are directories. There are also many files in the ‘Filter’ directory that are not required, but for keeping it simple we will use the whole thing. File (dir) Filter (dir) Loader (dir) Loader.php Filter.php Exception.php Encrypting uploaded files For the following example I’ve not included the file uploading code. I assume you already have the upload code ready. You can also use the following code by itself to encrypt/decrypt files. The program for file encryption is shown below. 'mcrypt', // Initialization vector 'vector' => '236587hgtyujkirtfgty5678', // Encryption algorithm 'algorithm' => 'rijndael-192', // Encryption key 'key' => 'KFJGKDK$$##^FFS345678FG2' ); /* Initialize the library and pass the options */ $encrypt = new Zend_Filter_File_Encrypt ( $options ); /* Set output filename, where the encrypted file will be stored. If we omit this, the encrypted file will overwrite the original file. */ $encrypt -> setFilename ( 'test.enc.pdf' ); /* Now encrypt a file */ $encrypt -> filter ( 'test.pdf' );?> Decrypting the encrypted files is as simple as above. Note that you need to keep the ‘vector’ and ‘key’ values the same as you used for encryption, or you will not be able to correctly decrypt the file. 'mcrypt', // Initialization vector 'vector' => '236587hgtyujkirtfgty5678', // Decryption algorithm 'algorithm' => 'rijndael-192', // Decryption key 'key' => 'KFJGKDK$$##^FFS345678FG2' ); /* Initialize the library and pass the options */ $decrypt = new Zend_Filter_File_Decrypt ( $options ); /* Set output filename, where the decrypted file will be stored. Harman Kardon computer speakers deliver excellent sound in a design that's a work of art. Browse a selection of 2.0, 2.1, and Bluetooth PC speakers. Harmon kardon speakers driver hp laptop. Php Zend Framework*/ $decrypt -> setFilename ( 'test.pdf' ); /* Now decrypt the previously encrypted file */ $decrypt -> filter ( 'test.enc.pdf' );?> Selecting a encryption algorithm In the example given I’ve used the algorithm but you can choose some other according to the availability. ‘rijndael’ is fine for most requirements. First you will need to know what algorithms are supported by your installation. A quick way to find out is to use the following code. Cast-128, gost, rijndael-128, twofish, arcfour, cast-256, loki97, rijndael-192, saferplus, wake, blowfish-compat, des, rijndael-256, serpent, xtea, blowfish, enigma, rc2, tripledes. Selecting a random Initialization vector Before we continue our discussion, a brief overview of Initialization vector (IV). An IV is a random string that can be used along with a key for data encryption.
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