Code for two of the routing protocols used by SOS can be found in the "code" folder.
The underlining iOS framework that the SOS Middleware for creating certificate signing requests (CSRs) was created by the CTO of One Degree Technologies and has already been completelely open sourced here: https://github.com/cbaker6/CertificateSigningRequestSwift.
The rest of the code has not been open sourced, but will in the future.