Distinguishing features: CL+SSL is portable code based on CFFI and gray streams. It defines its own libssl BIO method, so that SSL I/O can be written over portable Lisp streams instead of bypassing the streams and sending data over Unix file descriptors directly. (But the traditional approach is still used if possible.)
Repository: https://github.com/cl-plus-ssl/cl-plus-ssl
Home page: https://common-lisp.net/project/cl-plus-ssl/
networking protocol cryptography