<?php
 
use Cryptography\Ciphers\Cipher;
use Cryptography\Ciphers\Algorithms;
use Cryptography\Ciphers\Modes;
use Cryptography\Backends\DefaultBackend;
 
function decrypt_file($encrypted_file, $key, $iv) {
    $file = fopen($encrypted_file, 'rb');
    $ciphertext = fread($file, filesize($encrypted_file));
    fclose($file);
 
    $cipher = new Cipher(new Algorithms\AES($key), new Modes\CFB8($iv), new DefaultBackend());
    $decryptor = $cipher->decryptor();
    $decrypted_text = $decryptor->update($ciphertext) . $decryptor->finalize();
 
    $decrypted_file = fopen(substr($encrypted_file, 0, -4) . '_decrypted.txt', 'wb');
    fwrite($decrypted_file, $decrypted_text);
    fclose($decrypted_file);
 
    // Print the decrypted content
    echo utf8_decode($decrypted_text);
}
 
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $key = $_POST['key'];  // استلام المفتاح كمدخل من المستخدم
    $iv = hex2bin($_POST['iv']); // استلام iv كسلسلة سداسية وتحويلها إلى ثنائية
    $file_path = "Data.txt.enc";
    decrypt_file($file_path, $key,$iv);
}
?>
 

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