PHP와 XML을 사용하여 데이터를 암호화하고 해독하는 방법

<?php
// 加密函数
function xmlEncrypt($data, $key) {
    $iv = openssl_random_pseudo_bytes(openssl_cipher_iv_length('aes-256-cbc'));
    $encryptedData = openssl_encrypt($data, 'aes-256-cbc', $key, OPENSSL_RAW_DATA, $iv);
    $encryptedData = base64_encode($encryptedData);
    $iv = base64_encode($iv);
    $xml = '<?xml version="1.0" encoding="UTF-8"?>
                <encryptedData>
                    <data>' . $encryptedData . '</data>
                    <iv>' . $iv . '</iv>
                </encryptedData>';
    return $xml;
}

// 测试加密示例
$data = 'Hello, World!';
$key = 'test1234';
$encryptedXml = xmlEncrypt($data, $key);
echo $encryptedXml;
?>

<?php
// 解密函数
function xmlDecrypt($encryptedXml, $key) {
    $xml = simplexml_load_string($encryptedXml);
    $encryptedData = base64_decode($xml->data);
    $iv = base64_decode($xml->iv);
    $decryptedData = openssl_decrypt($encryptedData, 'aes-256-cbc', $key, OPENSSL_RAW_DATA, $iv);
    return $decryptedData;
}

// 测试解密示例
$encryptedXml = '<?xml version="1.0" encoding="UTF-8"?>
                <encryptedData>
                    <data>2clA1uqyK3yTmihlRF+L4A==</data>
                    <iv>GJZqQhYT6MbshL6qyHJq3A==</iv>
                </encryptedData>';
$key = 'test1234';
$decryptedData = xmlDecrypt($encryptedXml, $key);
echo $decryptedData;
?>