PHP의 민감한 데이터 암호화 및 복호화 기술 소개

<?php
$key = "abc123";  // 密钥

function encrypt($data, $key) {
    $encrypted_text = openssl_encrypt($data, 'AES-128-CBC', $key, OPENSSL_RAW_DATA, '1234567890abcdef');
    return base64_encode($encrypted_text);
}

function decrypt($encrypted_data, $key) {
    $encrypted_text = base64_decode($encrypted_data);
    return openssl_decrypt($encrypted_text, 'AES-128-CBC', $key, OPENSSL_RAW_DATA, '1234567890abcdef');
}

$original_data = "Hello world!";
$encrypted_data = encrypt($original_data, $key);
$decrypted_data = decrypt($encrypted_data, $key);

echo "原始数据：".$original_data."<br>";
echo "加密后的数据：".$encrypted_data."<br>";
echo "解密后的数据：".$decrypted_data."<br>";
?>

<?php
// 生成公钥和私钥
$config = array(
    "private_key_bits" => 2048,
    "private_key_type" => OPENSSL_KEYTYPE_RSA,
);

$res = openssl_pkey_new($config);
openssl_pkey_export($res, $private_key);
$public_key = openssl_pkey_get_details($res)["key"];

function encrypt($data, $public_key) {
    openssl_public_encrypt($data, $encrypted, $public_key);
    return base64_encode($encrypted);
}

function decrypt($encrypted_data, $private_key) {
    openssl_private_decrypt(base64_decode($encrypted_data), $decrypted, $private_key);
    return $decrypted;
}

$original_data = "Hello world!";
$encrypted_data = encrypt($original_data, $public_key);
$decrypted_data = decrypt($encrypted_data, $private_key);

echo "原始数据：".$original_data."<br>";
echo "加密后的数据：".$encrypted_data."<br>";
echo "解密后的数据：".$decrypted_data."<br>";
?>