PHP ENCRYPTION USING EXTENDED FUNCTIONS

by jamied_uk 27th October 2013, 01:11

Code:: <?php function encrypt_decrypt($action, $string) { $output = false; $encrypt_method = "AES-256-CBC"; $secret_key = 'SuperSecretKey'; $secret_iv = 'SuperSecret_iv; // hash $key = hash('sha256', $secret_key); $iv = hash('sha256', $secret_iv); if( $action == 'encrypt' ) { $output = openssl_encrypt($string, $encrypt_method, $key, $iv); $output = base64_encode($output); } else if( $action == 'decrypt' ){ $output = $decryptedMessage = openssl_decrypt(base64_decode($string), $encrypt_method, $key, $iv); } return $output; } $plain_txt = "This is my plain text"; echo "Plain Text = $plain_txt\n"; ?> <P> <?php $encrypted_txt = encrypt_decrypt('encrypt', $plain_txt); echo "Encrypted Text = $encrypted_txt\n"; ?> <P> <?php $decrypted_txt = encrypt_decrypt('decrypt', $encrypted_txt); echo "Decrypted Text = $decrypted_txt\n"; ?> <P> <?php if( $plain_txt === $decrypted_txt ) echo "SUCCESSFULLY DECRYPTED!"; else echo "FAILED"; echo "\n"; /** * simple method to encrypt or decrypt a plain text string * initialization vector(IV) has to be the same when encrypting and decrypting * requires PHP 5 >= 5.3.0 * * this is a beginners template for simple encryption decryption * before using this in production environments, please read about encryption * * @param string $action: can be 'encrypt' or 'decrypt' * @param string $string: string to encrypt or decrypt * * @return string */ ?>