code: def create(data, cipher, key, flags=0):
          
          bio = Membio(data)
          ptr = libcrypto.CMS_EncryptedData_encrypt(bio.bio, cipher.cipher,
                                                    key, len(key), flags)
          if ptr is None:
              raise CMSError("encrypt data")
          return EncryptedData(ptr)
docs: Creates an EncryptedData message.
          @param data data to encrypt
          @param cipher cipher.CipherType object represening required
                  cipher type
          @param key - byte array used as simmetic key
          @param flags - OR-ed combination of Flags constant