NAME

       tcl::transform::otp - Encryption via one-time pad

SYNOPSIS

       package require Tcl  8.6

       package require tcl::transform::core  ?1?

       package require tcl::transform::otp  ?1?

       ::tcl::transform::otp chan keychanw keychanr

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DESCRIPTION

       The tcl::transform::otp package provides a command creating a channel transformation which
       uses externally provided one-time pads to perform encryption (on writing)  and  decryption
       (on reading).

       A related transformations in this module is tcl::transform::rot.

       The  internal  TclOO  class  implementing  the  transform  handler  is  a sub-class of the
       tcl::transform::core framework.

API

       ::tcl::transform::otp chan keychanw keychanr
              This command creates a one-time pad based encryption transformation on top  of  the
              channel chan and returns its handle.

              The  two channels keychanw and keychanr contain the one-time pads for the write and
              read directions, respectively. Their contents are reads and xored  with  the  bytes
              written to and read from the channel.

BUGS, IDEAS, FEEDBACK

       This  document,  and  the  package  it  describes, will undoubtedly contain bugs and other
       problems.  Please  report  such  in  the  category  virtchannel  of  the  Tcllib  Trackers
       [http://core.tcl.tk/tcllib/reportlist].  Please also report any ideas for enhancements you
       may have for either package and/or documentation.

       When proposing code changes, please provide unified diffs, i.e the output of diff -u.

       Note further that attachments are strongly preferred over inlined patches. Attachments can
       be  made  by going to the Edit form of the ticket immediately after its creation, and then
       using the left-most button in the secondary navigation bar.

KEYWORDS

       channel transformation, cipher, decryption,  encryption,  one  time  pad,  otp,  reflected
       channel, tip 230, transformation, virtual channel, xor

CATEGORY

       Channels

COPYRIGHT

       Copyright (c) 2009 Andreas Kupries <andreas_kupries@users.sourceforge.net>