532   nread = conn->mech->decode(conn->app_data, buf->data, len,  in read_data()
612   bytes = conn->mech->encode(conn->app_data, from, length, prot_level,  in do_sec_send()
689   if(!conn->mech)  in Curl_sec_read_msg()
705   decoded_len = conn->mech->decode(conn->app_data, buf, decoded_len,  in Curl_sec_read_msg()
807   const struct Curl_sec_client_mech *mech = &Curl_krb5_client_mech;  in choose_mech()  local
809   tmp_allocation = realloc(conn->app_data, mech->size);  in choose_mech()
811     failf(data, "Failed realloc of size %zu", mech->size);  in choose_mech()
812     mech = NULL;  in choose_mech()
817   if(mech->init) {  in choose_mech()
818     ret = mech->init(conn->app_data);  in choose_mech()
821             mech->name);  in choose_mech()
826   infof(data, "Trying mechanism %s...", mech->name);  in choose_mech()
827   ret = ftp_send_command(data, "AUTH %s", mech->name);  in choose_mech()
835             "returned ftp code: 504).", mech->name);  in choose_mech()
839             "ftp code: 534).", mech->name);  in choose_mech()
852   ret = mech->auth(conn->app_data, data, conn);  in choose_mech()
861     conn->mech = mech;  in choose_mech()
886   if(conn->mech && conn->mech->end)  in Curl_sec_end()
887     conn->mech->end(conn->app_data);  in Curl_sec_end()
899   conn->mech = NULL;  in Curl_sec_end()