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



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NAME
       base32::hex - base32 extended hex encoding

SYNOPSIS
       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

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DESCRIPTION
       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.

API
       ::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 signal 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 signal 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,

CODE MAP
       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
       characters.


                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


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

KEYWORDS
       base32, hex, rfc3548

CATEGORY
       Text processing

COPYRIGHT
       Copyright (c) Public domain




base32                                0.1                       base32::hex(n)
