utf-8 legal and illegal encoding generator

[Chan Fook Sheng <chanfooksheng () pacific net sg>]

Hi

As you may know, one of the method used in PT is malicious url encoding, 
which includes illegal unicode encoding.

an example will be

the "/" character is 47 in decimal, 2F in hex in ASCII.

It can be represented in UTF-8 format as:
1 byte: still 2F (legal)
2 bytes: C0 AF (illegal)
3 bytes: E0 80 AF (illegal)

So in PT, I think it would be convenient if there is a tool that will 
generate the 1, 2 and 3 byte utf-8 encoding for an given ASCII character.

does this kind of tools exists?

can anyone direct me to some links?

fook sheng



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