2-factor auth options

[Konstantin Ryabitsev]

Hello, all:

Is there any mechanism to add some kind of 2-factor authentication
mechanism either via:

a. additional prompting for a HOTP/TOTP key sequence similar to how
openvpn allows doing auth-user-pass in addition to certificate-based
authentication

b. some way to use PGP Auth keys with wireguard so that keys stored on
GnuPG-capable smartcards can be used for establishing a VPN connection.

c. (some other means)


Best,
-K
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