一、Composer 下载 phpseclib

# 我使用的是 phpseclib3
composer require phpseclib/phpseclib

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二、RSA 加密解密

// 我使用的是 phpseclib3use 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# ------------------------
# 使用已有密钥加密
$rsa_public_obj = RSA::loadPublicKey($public_key);
$plaintext  = '测试加密文本';
$ciphertext = base64_encode($rsa_public_obj->encrypt($plaintext));# 使用已有密钥解密
$rsa_private_obj = RSA::loadPrivateKey($private_key);
$text = $rsa_private_obj->decrypt(base64_decode($ciphertext));

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