Absicherung NFS

Absicherung NFS

Plan

Step 1: Authentifizierung mit 802.1x. 1x Switch, 1x Client und 1x RADIUS Server

Step 2: CSR in TPM generieren oder Zertifikat mit Schluessel importieren.

Step 3: Zertifikat aus TPM fuer 802.1x verwenden.

Radius

RADIUS uses User Datagram Protocol (UDP) port 1812 for authentication and 1813 for accounting

• radiusd.conf Defines the configuration parameters for the RADIUS server. It includes references to all of the other configuration files.

• clients.conf Defines information necessary to configure the RADIUS client, including IP addresses and shared secrets. This file is referenced from the radiusd.conf file.

• dictionary Defines local attributes for the RADIUS server. This file references the default dictionary files. The default dictionary files include thousands of attribute definitions for over one hundred vendors.

• proxy.conf Defines upstream home servers, including information on IP addresses and shared secrets. It also defines Realms. The radiusd.conf file references the proxy.conf file.

• sites-enabled/default This is the default virtual server. This file handles authentication and accounting requests. It contains a configuration designed to work with the largest number of authentication protocols. The radiusd.conf file references the sites-enable/default file.

• sites-enabled/inner-tunnel This virtual server handles authentication methods that are carried inside of a TLS tunnel, as part of PEAP or EAP-TTLS authentication. The radiusd.conf file references the sql.conf file.

• users The traditional RADIUS configuration file for users. This file format is similar to the format defined in 1993. The files file references the users file.

Implementierung

Ein Programm schreiben, welches eine CSR erstellt, wobei der private key im TPM erstellt wird und anschließend eine wpa-supplicant config erstellt. Ähnlich wie hier nur für wired:

https://wiki.archlinux.org/title/wpa_supplicant

cat > wpa_supplicant.conf <<EOF
network={
    ssid="SSID"
    key_mgmt=WPA-EAP
    eap=TLS
    identity="testing"
    ca_cert="/etc/pki/SSID/ca.pem"
    client_cert="/etc/pki/SSID/client.crt"
    private_key="pkcs11:model=Intel;manufacturer=Intel;serial=0000000000000000;token=label;id=%32%62%37%30%65%62%36%32%66%33%32%62%31%63%65%37;object=0;type=private;pin-value=userpin"
}
EOF

Ressourcen

https://tpm2-software.github.io/

https://github.com/tpm2-software/tpm2-pkcs11/blob/master/tools/tpm2_ptool.py

https://en.wikipedia.org/wiki/Xsupplicant