PHP数据加解密操作

$key = random_bytes(32);  // 生成一个32字节长的随机密钥

$data = "敏感数据";
$encrypted = openssl_encrypt($data, 'AES-256-CBC', $key, OPENSSL_RAW_DATA, $iv);  // 加密数据
$iv = openssl_random_pseudo_bytes(openssl_cipher_iv_length('AES-256-CBC'));  // 生成一个随机的初始向量

$decrypted = openssl_decrypt($encrypted, 'AES-256-CBC', $key, OPENSSL_RAW_DATA, $iv);  // 解密数据

$config = array(
    "digest_alg" => "sha512",
    "private_key_bits" => 4096,
    "private_key_type" => OPENSSL_KEYTYPE_RSA,
);
$res = openssl_pkey_new($config);  // 生成RSA密钥对
openssl_pkey_export($res, $privateKey);  // 导出私钥
$publicKey = openssl_pkey_get_details($res)['key'];  // 获取公钥

$data = "敏感数据";
openssl_public_encrypt($data, $encrypted, $publicKey);  // 使用公钥加密数据

openssl_private_decrypt($encrypted, $decrypted, $privateKey);  // 使用私钥解密数据

$data = "原始数据";
$hash = md5($data);  // 计算MD5哈希值
$hash = sha1($data);  // 计算SHA1哈希值
$hash = hash('sha256', $data);  // 计算SHA256哈希值

$hash = "存储的哈希值";
if (md5($data) === $hash) {
    echo "哈希值一致";
} else {
    echo "哈希值不一致";
}