(31.10.2019, 08:49)MichelDeLigne Wrote: I don't think it is related to the line 101. REST sends a json results, that is supposed to be enclosed in {}.
In your case, I would say the problem is probably with the first "{", that seems to be missing.

(28.07.2020, 18:39)m.j.sorokin Wrote: Good day! I'm trying a lice script with a Buderus KM200 V2 device. When I try to run the script, I get the following error:

km200 28.07.2020 21:34:09
User library aes:178: Symbol not found: EVP_CIPHER_CTX_init
stack traceback:
[C]: in function '__index'
User library aes:178: in function 'new'
Resident script:97: in function 'km200_GetData'

What could be the reason?

(30.07.2020, 06:20)admin Wrote: Replace km200_Decrypt function with this. Original function removes all data after the first "}" while it should remove it after the last "}", this is why you get an error when there are multiple "}" in returned data.

Code:

function km200_Decrypt(decryptData)
    local hash = { iv = string.rep('\0', 16) } -- no hashing method for key
    local aes_256_ecb, err = aes:new(km200_crypt_key_private, nil, aes.cipher(256, 'ecb'), hash, nil, 0)
    local res = aes_256_ecb:decrypt(encdec.base64dec(decryptData)) -- data block size is always 128 bits

    -- Search the position of the last "}", and remove all the remaining padding after that
    local endposition
    while true do
      local pos = res:find("}", endposition)
      if pos then
          endposition = pos + 1
      else
          break
      end
    end

    if endposition then
        res = res:sub(1, endposition - 1)
    end
    return res
end