Panasonic Viera TV IP control

[parkerc]

This code requires LuaJIT. It won't work with standard Lua because it does not have FFI library.

Can I assume an alternative Lua library (or libraries) could be used ? 

For example  to get around the encdec.base64dec() requirement, I used a base64 function/code from here - http://lua-users.org/wiki/BaseSixtyFour and added a specific new function called encdec_base64dec()

Code:

-- decoding
function encdec_base64dec(data)
    local b = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
    data = string.gsub(data, '[^'..b..'=]', '')
    return (data:gsub('.', function(x)
        if (x == '=') then return '' end
        local r,f='',(b:find(x)-1)
        for i=6,1,-1 do r=r..(f%2^i-f%2^(i-1)>0 and '1' or '0') end
        return r;
    end):gsub('%d%d%d?%d?%d?%d?%d?%d?', function(x)
        if (#x ~= 8) then return '' end
        local c=0
        for i=1,8 do c=c+(x:sub(i,i)=='1' and 2^(8-i) or 0) end
        return string.char(c)
    end))
end

I would really appreciate any guidance on alternatives for other calls such as those below e.g hex to/from string and aes_cbc encrypt/decrypt etc.

Code:

lmcore.strtohex(decrypted)
lmcore.hextostr('15C95AC2B08AA7EB4E228F811E34D04FA54BA7DCAC9879FA8ACDA3FC244F3854', true)
aes_cbc:decrypt(encdec.base64dec(data))
aes_cbc:encrypt(payload)
encdec.hmacsha256(ciphertext, hmac_key, true)

Is something like https://github.com/somesocks/lua-lockbox or something similar potentially a viable alternative library?