Export WiFi x509 client certificate

My Android (4.4) device has a WiFi configured which uses WPA2-TLS authentication with client certificates.

I got my hands on the wpa_supplicant configuration and the relevant entry looks like this: network={ ssid="fobar" key_mgmt=WPA-EAP IEEE8021X eap=TLS identity="000123" password="000000" ca_cert="http://keystoreCACERT_fobar_WPA_EAPIEEE8021X_TLS_NULL" client_cert="http://keystoreUSRCERT_fobar_WPA_EAPIEEE8021X_TLS_N" engine_id="keystore" key_id="USRPKEY_fobar_WPA_EAPIEEE8021X_TLS_NULL" engine=1 proactive_key_caching=1 }

How can I get hold of the certificates and the key?