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base32::hex(n)				 Base32 encoding			   base32::hex(n)


       base32::hex - base32 extended hex encoding

       package require Tcl  8.4

       package require base32::core  ?0.1?

       package require base32::hex  ?0.1?

       ::base32::hex::encode string

       ::base32::hex::decode estring


       This  package  provides	commands for encoding and decoding of strings into and out of the
       extended hex base32 encoding as specified in the RFC 3548bis draft.

       ::base32::hex::encode string
	      This command encodes the given string  in  extended  hex	base32	and  returns  the
	      encoded string as its result. The result may be padded with the character = to sig-
	      nal a partial encoding at the end of the input string.

       ::base32::hex::decode estring
	      This commands takes the estring and decodes it under the assumption that	it  is	a
	      valid extended hex base32 encoded string. The result of the decoding is returned as
	      the result of the command.

	      Note that while the encoder will generate only uppercase	characters  this  decoder
	      accepts input in lowercase as well.

	      The  command will always throw an error whenever encountering conditions which sig-
	      nal some type of bogus input, namely if

	      [1]    the input contains characters which are not valid output of a  extended  hex
		     base32 encoder,

	      [2]    the length of the input is not a multiple of eight,

	      [3]    padding appears not at the end of input, but in the middle,

	      [4]    the padding has not of length six, four, three, or one characters,

       The  code  map  used to convert 5-bit sequences is shown below, with the numeric id of the
       bit sequences to the left and the character used to encode it to the right. The	important
       feature	of  the extended hex mapping is that the first 16 codes map to the digits and hex

	    0 0    9 9	      18 I   27 R
	    1 1   10 A	      19 J   28 S
	    2 2   11 B	      20 K   29 T
	    3 3   12 C	      21 L   30 U
	    4 4   13 D	      22 M   31 V
	    5 5   14 E	      23 N
	    6 6   15 F	      24 O
	    7 7        16 G   25 P
	    8 8        17 H   26 Q

       This document, and the package it describes, will undoubtedly contain bugs and other prob-
       lems.  Please report such in the category base32 of the Tcllib SF Trackers [http://source-
       forge.net/tracker/?group_id=12883].  Please also report any ideas for enhancements you may
       have for either package and/or documentation.

       base32, hex, rfc3548

       Copyright (c) Public domain

base32					       0.1				   base32::hex(n)
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