Trf is a TCL extension library. It extends the language
at the C-level with so-called ``transformer''-procedures.
The package is able to intercept all read/write operations
on designated channels, thus giving it the ability to
transform the buffer contents as desired. This allows
things like transparent encryption, compression, charset
recoding, etc. Build upon this framework (and as proof of
concept) a collection of tcl-level commands was implemented,
most of them related to cryptography.
WWW: http://www.oche.de/~akupries/soft/trf/
