https://csrc.nist.gov/projects/cryptographic-standards-and-guidelines
http://www.st.com/en/embedded-software/x-cube-cryptolib.html?ecmp=tt4183_gl_social_sep2016
https://wenku.baidu.com/view/a50c4accccbff121dc368396.html
http://www.51hei.com/bbs/dpj-46000-1.html
原文：http://www.cnblogs.com/legion/p/7826488.html