xf8uN4jf

1<?php
2
3function encrypt_decrypt($action, $string) {
4    $output = false;
5    $encrypt_method = "AES-256-CBC";
6    $secret_key = 'This is my secret key';
7    $secret_iv = 'This is my secret iv';
8    // hash
9    $key = hash('sha256', $secret_key);
10    
11    // iv - encrypt method AES-256-CBC expects 16 bytes - else you will get a warning
12    $iv = substr(hash('sha256', $secret_iv), 0, 16);
13    if ( $action == 'encrypt' ) {
14        $output = openssl_encrypt($string, $encrypt_method, $key, 0, $iv);
15        $output = base64_encode($output);
16    } else if( $action == 'decrypt' ) {
17        $output = openssl_decrypt(base64_decode($string), $encrypt_method, $key, 0, $iv);
18    }
19    return $output;
20}
21$plain_txt = "This is my plain text";
22echo "Plain Text =" .$plain_txt. "\n";
23$encrypted_txt = encrypt_decrypt('encrypt', $plain_txt);
24echo "Encrypted Text = " .$encrypted_txt. "\n";
25$decrypted_txt = encrypt_decrypt('decrypt', $encrypted_txt);
26echo "Decrypted Text =" .$decrypted_txt. "\n";
27if ( $plain_txt === $decrypted_txt ) echo "SUCCESS";
28else echo "FAILED";
29echo "\n";