UA_StatusCode UA_ClientConfig_setDefaultEncryption(UA_ClientConfig *config, UA_ByteString localCertificate, UA_ByteString privateKey, const UA_ByteString *trustList, size_t trustListSize, const UA_ByteString *revocationList, size_t revocationListSize)
If certificates are used for authentication, this is only possible when openssl or mbedtls is used.