一、Composer 下载 phpseclib

# 我使用的是 phpseclib3
composer require phpseclib/phpseclib

二、RSA 加密解密

// 我使用的是 phpseclib

use phpseclib3\Crypt\RSA;

$type = 'PKCS8'; // 看需求选其一, PKCS8 | PKCS1 | JWK | MSBLOB | OpenSSH | PSS | PuTTY | Raw | WML
$rsaObj = RSA::createKey();
$rsa_public = $rsaObj->getPublicKey();
$private_key = $rsaObj->toString($type); // 私钥
$public_key  = $rsa_public->toString($type); // 公钥

$plaintext  = '测试加密文本';
$ciphertext = $rsa_public->encrypt($plaintext); // 加密
echo $rsaObj->decrypt($ciphertext); // 解密

三、DES 加密解密

use phpseclib3\Crypt\DES;

// token 加密数据
$token_data = [
    'status'      => 1,
    'expire_time' => 2024-08-01 12:00:00
    // .....
];

$type = 'ecb'; // 看需求选其一, ecb | ctr | cbc | cfb | cfb8 | ofb | ofb8 | gcm | stream
$key = 'HF@w2f#1';
$des_obj = new DES($type);
$des_obj->setKey($key);
$token = base64_encode($des_obj->encrypt(json_encode($token_data))); // 加密
$token_decode = json_decode($des_obj->decrypt(base64_decode($token)), true); // 解密