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



____________________________________________________________________________________________________________

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

____________________________________________________________________________________________________________

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://source -
       forge.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)