473     if (c_session->psk_key) {  in coap_dtls_psk_client_callback()
474       coap_delete_bin_const(c_session->psk_key);  in coap_dtls_psk_client_callback()
477     c_session->psk_key = coap_new_bin_const(psk_info->key.s, psk_len);  in coap_dtls_psk_client_callback()
530     const coap_bin_const_t *psk_key =  in coap_dtls_psk_server_callback()  local
535     if (psk_key == NULL)  in coap_dtls_psk_server_callback()
537     if (psk_key->length > max_psk_len)  in coap_dtls_psk_server_callback()
539     memcpy(psk, psk_key->s, psk_key->length);  in coap_dtls_psk_server_callback()
540     coap_session_refresh_psk_key(c_session, psk_key);  in coap_dtls_psk_server_callback()
541     return (unsigned int)psk_key->length;  in coap_dtls_psk_server_callback()
1967   if ((session->psk_key) ||  in tls_secret_call_back()
2017     if (session->psk_key) {  in tls_secret_call_back()
2018       memcpy(secret, session->psk_key->s, session->psk_key->length);  in tls_secret_call_back()
2019       *secretlen = session->psk_key->length;  in tls_secret_call_back()
2282   if ((session->psk_key) ||  in tls_client_hello_call_back()