1tcl::transform::rot(n) Reflected/virtual channel supporttcl::transform::rot(n)
2
3
4
5______________________________________________________________________________
6

NAME

8       tcl::transform::rot - rot-encryption
9

SYNOPSIS

11       package require Tcl  8.6
12
13       package require tcl::transform::core  ?1?
14
15       package require tcl::transform::rot  ?1?
16
17       ::tcl::transform::rot chan key
18
19______________________________________________________________________________
20

DESCRIPTION

22       The  tcl::transform::rot  package provides a command creating a channel
23       transformation which performs primitive encryption (on writing) and de‐
24       cryption  (on  reading)  on the alphabetic characters. The algorithm is
25       the Caesar-cipher, a specific variant of which is rot13.
26
27       A related transformations in this module is tcl::transform::otp.
28
29       The internal TclOO class implementing the transform handler is  a  sub-
30       class of the tcl::transform::core framework.
31

API

33       ::tcl::transform::rot chan key
34              This  command  creates a rot encryption transformation on top of
35              the channel chan and returns its handle.
36
37              The "key" specifies how far characters are rotated in the alpha‐
38              bet, and is wrapped to the range "0...25".
39
40              Note  that  this transformation affects only bytes in the ranges
41              ASCII 65...90, and 97...122, i.e. the upper- and lower-case  al‐
42              phabetic  characters,  i.e. "A...Z" and "a...z". All other bytes
43              are passed through unchanged.
44

BUGS, IDEAS, FEEDBACK

46       This document, and the package it describes, will  undoubtedly  contain
47       bugs  and other problems.  Please report such in the category virtchan‐
48       nel  of  the  Tcllib  Trackers  [http://core.tcl.tk/tcllib/reportlist].
49       Please  also  report any ideas for enhancements you may have for either
50       package and/or documentation.
51
52       When proposing code changes, please provide unified diffs, i.e the out‐
53       put of diff -u.
54
55       Note  further  that  attachments  are  strongly  preferred over inlined
56       patches. Attachments can be made by going  to  the  Edit  form  of  the
57       ticket  immediately  after  its  creation, and then using the left-most
58       button in the secondary navigation bar.
59

KEYWORDS

61       caesar cipher, channel transformation, cipher, decryption,  encryption,
62       reflected channel, rot, rot13, tip 230, transformation, virtual channel
63

CATEGORY

65       Channels
66

68       Copyright (c) 2009 Andreas Kupries <andreas_kupries@users.sourceforge.net>
69
70
71
72
73tcllib                                 1                tcl::transform::rot(n)
Impressum