I while ago I took Adam Langley's and DJB's crit-bit code and put a CDB-compatible API around it, it's at; https://github.com/colmmacc/nutrient https://github.

I while ago I took Adam Langley's and DJB's crit-bit code and put a CDB-compatible API around it, it's at; https://github.com/colmmacc/nutrient https://github.com/colmmacc/nutrient still a work in progress, but it made it considerably easier for me to fully understand what's going on. May help others.