lass: init otp-ssh

1 files changed, 18 insertions, 0 deletions

diff --git a/lass/2configs/otp-ssh.nix b/lass/2configs/otp-ssh.nix
new file mode 100644
index 000000000..f9984e245
--- /dev/null
+++ b/lass/2configs/otp-ssh.nix
@@ -0,0 +1,18 @@
+{ pkgs, ... }:
+# Enables second factor for ssh password login
+
+## Usage:
+#  gen-oath-safe <username> totp
+## scan the qrcode with google authenticator (or FreeOTP)
+## copy last line into secrets/<host>/users.oath (chmod 700)
+{
+  security.pam.oath = {
+    # enabling it will make it a requisite of `all` services
+    # enable = true;
+    digits = 6;
+    # TODO assert existing
+    usersFile = (toString <secrets>) + "/users.oath";
+  };
+  # I want TFA only active for sshd with password-auth
+  security.pam.services.sshd.oathAuth = true;
+}