From 5f743cbd32572a25e0df73b823cd866f1d80f01a Mon Sep 17 00:00:00 2001
From: lassulus <lassulus@lassul.us>
Date: Mon, 17 Jul 2017 15:11:54 +0200
Subject: lass: init otp-ssh

---
 lass/1systems/mors/config.nix |  1 +
 lass/2configs/otp-ssh.nix     | 18 ++++++++++++++++++
 2 files changed, 19 insertions(+)
 create mode 100644 lass/2configs/otp-ssh.nix

(limited to 'lass')

diff --git a/lass/1systems/mors/config.nix b/lass/1systems/mors/config.nix
index b93ead6db..29dacf8dc 100644
--- a/lass/1systems/mors/config.nix
+++ b/lass/1systems/mors/config.nix
@@ -24,6 +24,7 @@ with import <stockholm/lib>;
     <stockholm/lass/2configs/ircd.nix>
     <stockholm/lass/2configs/logf.nix>
     <stockholm/lass/2configs/syncthing.nix>
+    <stockholm/lass/2configs/otp-ssh.nix>
     {
       #risk of rain port
       krebs.iptables.tables.filter.INPUT.rules = [
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;
+}
-- 
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