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Base32 Class in ObjectiveC

Hi,

I would like an ObjectiveC Class which be used to Base32 Encode/Decode Strings (Files not needed). I know that there are many similar class in C/C++, but I need this one done in ObjactiveC.

In addition? to the 'regular' encoding, I'd like the class to be able to use custom character sets. i.e. I believe that the regular encoding uses this character set "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567", but I'd like this class to be able to use different sets. An example of what I mean can be seen here:

<[url removed, login to view]>

This PHP class lets you specify a 'safe' character set(csSafe) which prevents users from mixing up letters and numbers(1s and Is and Ls).

I'd basically like this class to have two functions:

EncodeStringToBase32(string, CharacterSet)

DecodeStringFromBase32(string, CharacterSet)

e.g. EncodeStringToBase32(string, RegularCharacterSet) or EncodeStringToBase32(string, SafeCharacterSet) and the same for DecodeString.

Deliverables:

1. One class which can BASE32 encode/decode strings with either the 'Regular' or 'Safe' character sets.

2. A small application to test the encode/decode. e.g. A single window with 3 TextBoxes(StringBefore, StringAfter, StringDecoded again),a Combo for the Character Set, and a button.

If you have any questions, please let me know.

Reference links:

PHP Class:? <[url removed, login to view]>

C++ Example: <[url removed, login to view]>

RFC for Base32:? <[url removed, login to view]>

Skills: Cocoa, Engineering, MySQL, PHP, Software Architecture, Software Testing

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schottkey

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