chromeos/test/data/network/wifi_eap_tls.onc

{
  "GUID": "{77db0089-0bc8-4358-929c-123xcv}",
  "Type": "WiFi",
  "Name": "WifiEapTls",
  "WiFi": {
    "Security": "WPA-EAP",
    "FTEnabled": true,
    "EAP": {
      "Outer": "EAP-TLS",
      "Identity": "my_identity",
      "UseSystemCAs": true,
      "ClientCertType": "PKCS11Id",
      "ClientCertPKCS11Id": "1:123456abcdef",
      "SaveCredentials": true,
      "SubjectMatch": "my_subject",
      "TLSVersionMax": "1.2",
      "UseSystemCAs": true
    }
  },
}