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base32(n)                                      Base32 encoding                                     base32(n)



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NAME
       base32 - base32 standard encoding

SYNOPSIS
       package require Tcl  8.4

       package require base32::core  ?0.1?

       package require base32  ?0.1?

       ::base32::encode string

       ::base32::decode estring

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DESCRIPTION
       This  package  provides  commands  for  encoding and decoding of strings into and out of the standard
       base32 encoding as specified in RFC 3548.

API
       ::base32::encode string
              This command encodes the given string in 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::decode estring
              This commands takes the estring and decodes it under the assumption that it is a valid  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 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. It should be noted that the  characters
       "0"  and  "1"  are  not used by the encoding. This is done as these characters can be easily confused
       with "O", "o" and "l" (L).

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


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, rfc3548

COPYRIGHT
       Copyright (c) Public domain




base32                                               0.1                                           base32(n)