The components of bsssd can be downloaded from the SourceForge project page http://sourceforge.net/projects/bsssd/:
The files available are:
This file contains the kernel device driver for /dev/tpm in the format of “context diffs” against OpenBSD 4.7.
This file contains the kernel device driver for /dev/tpm in the format of “context diffs” against FreeBSD 8.0
Note that the tpm driver was imported to FreeBSD current, see FreeBSD mail archive. These patches are no longer needed for FreeBSD current.
This tar archive contains the files that makes a OpenBSD port. The port comprises the userland tools: