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 # 参考资料
+* [The SM4 Block Cipher Algorithm And Its Modes Of Operations](https://tools.ietf.org/id/draft-crypto-sm4-00.html)
 * [SM4的快速软件实现技术](https://m.doc88.com/p-1823908753601.html)
 * [SM4的快速软件实现技术](http://html.rhhz.net/ZGKXYDXXB/20180205.htm)
 * [sm4ni](https://github.com/mjosaarinen/sm4ni)