Buderus KM200 api

[admin]

Try disabling padding in km200_Encrypt and km200_Decrypt:

Code:

function km200_Encrypt(encryptData)
    -- add PKCS #7 padding
    encryptData = pad(encryptData)

    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, false) -- no padding

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, false) -- no padding