Trf: Main documentation
Author: Andreas Kupries,,,

# The Trf documentation

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This document accompanies trf 2.1p2, as distributed at August 20, 2001

If you are interested in a version of Trf usable with Tcl 7.6, please go and have a look at version 1.8, the last one supporting that version of Tcl.

trf is an extension library to the script language `tcl`, as created by John Ousterhout. It extends the language at the C-level with so-called ``transformer''-procedures. With the help of some patches to the core 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. Additionally some binary data support is put in as well.

Note: The patches mentionend above are required only for Tcl 8.0.x and 8.1.x. Since version 8.2 the Trf patches are an official part of the core.

Packages built upon the fundament provided by trf are

- TrfCrypt, by myself, contains various encryption systems
- `TLS`, an SSL/TLS implementation by Matt Newman.
- `Tcl MIME` by Marshall Rose.

Last update at Mon Aug 20 22:52:27 PDT 2001