其他-使用 PHP 和 OpenSSL 生成对称密钥 AES-256-CBC https://www.nuomiphp.com/a/stackoverflow/zh/6128b9885dd3a34f7a283196.html
PHP实现AES对称加密 https://www.cnblogs.com/aworkstory/p/php-aes-symmetrical-encryption.html
aes对称加密php,PHP对称加密-AES https://blog.csdn.net/weixin_35552177/article/details/115648242
PHP对称加密算法（DES/AES）类的实现代码https://www.lmlphp.com/user/16789/article/item/563535/
PHP实现AES对称加密 https://doc.wendoc.com/b198a7623feaed9e487ffbfbbe2a45704ebfa21e1-2.html
php sm2sm3sm4 https://github.com/lpilp/phpsm2sm3sm4
sm4国密加密算法php实现(真实可用) https://blog.csdn.net/gusijin/article/details/116839994
phpsm2sm3sm4 – PHP version of the national secret sm2 signature algorithm, sm3 hash, sm4 ecb encryption and decryption https://www.big-meter.com/opensource/en/619089b3ff1bdf1afb1d8164.html
php 与java对接国密sm2遇到的一些问题（招商银行接口） https://learnku.com/php/t/68126