Unfortunately, I've lost my re-discovery of the OSF/1 bigcrypt()
algorithm. DEC are *very* reticent about letting details out and its
documentation is virtually non-existent. However, examination of the
contents of /tcb/files/auth/p/pcl as I changed my password, together
with a few astute guesses, was all that were required.
If I find the bigcrypt() code again, I'll post it.