libbaseencode : Library written in C for encoding and decoding data using base32 or base64 (RFC-4648) ( https://github.com/paolostivanin/libbaseencode )
libcotp : C library that generates TOTP and HOTP ( https://github.com/paolostivanin/libcotp )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a dwosky
For Paludis use this rsync : rsync://gentoo.zugaina.org/dwosky-portage
If you have a problem : ycarus(-at-)zugaina.org