From 47990ff6f9e87fab30d8132b2d52a758163f695b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sandro=20J=C3=A4ckel?= <sandro.jaeckel@gmail.com>
Date: Tue, 3 Jan 2023 02:06:00 +0100
Subject: [PATCH] Add module for well-known public git hosters public ssh keys
 to known_hosts

---
 lib/ssh.nix     | 10 ++++++++++
 modules/ssh.nix | 27 +++++++++++++++++++++++++++
 2 files changed, 37 insertions(+)
 create mode 100644 lib/ssh.nix
 create mode 100644 modules/ssh.nix

diff --git a/lib/ssh.nix b/lib/ssh.nix
new file mode 100644
index 00000000..5d02451
--- /dev/null
+++ b/lib/ssh.nix
@@ -0,0 +1,10 @@
+{ ... }:
+
+{
+  mkPubKey = name: type: publicKey: {
+    "${name}-${type}" = {
+      extraHostNames = [ name ];
+      inherit publicKey;
+    };
+  };
+}
diff --git a/modules/ssh.nix b/modules/ssh.nix
new file mode 100644
index 00000000..cf26967
--- /dev/null
+++ b/modules/ssh.nix
@@ -0,0 +1,27 @@
+{ config, lib, libS, ... }:
+
+let
+  cfg = config.programs.ssh;
+in
+{
+  options = {
+    programs.ssh.addPopularKnownHosts = libS.mkOpinionatedOption "add ssh public keys of popular websites to known_hosts";
+  };
+
+  config = lib.mkIf cfg.addPopularKnownHosts {
+    programs.ssh.knownHosts = lib.mkMerge [
+      (libS.mkPubKey "github.com" "ssh-rsa" "AAAAB3NzaC1yc2EAAAABIwAAAQEAq2A7hRGmdnm9tUDbO9IDSwBK6TbQa+PXYPCPy6rbTrTtw7PHkccKrpp0yVhp5HdEIcKr6pLlVDBfOLX9QUsyCOV0wzfjIJNlGEYsdlLJizHhbn2mUjvSAHQqZETYP81eFzLQNnPHt4EVVUh7VfDESU84KezmD5QlWpXLmvU31/yMf+Se8xhHTvKSCZIFImWwoG6mbUoWf9nzpIoaSjB+weqqUUmpaaasXVal72J+UX2B+2RPW3RcT0eOzQgqlJL3RKrTJvdsjE3JEAvGq3lGHSZXy28G3skua2SmVi/w4yCE6gbODqnTWlg7+wC604ydGXA8VJiS5ap43JXiUFFAaQ==")
+      (libS.mkPubKey "github.com" "ecdsa-sha2-nistp256" "AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBEmKSENjQEezOmxkZMy7opKgwFB9nkt5YRrYMjNuG5N87uRgg6CLrbo5wAdT/y6v0mKV0U2w0WZ2YB/++Tpockg=")
+      (libS.mkPubKey "github.com" "ssh-ed25519" "AAAAC3NzaC1lZDI1NTE5AAAAIOMqqnkVzrm0SdG6UOoqKLsabgH5C9okWi0dh2l9GKJl")
+      (libS.mkPubKey "gitlab.com" "ssh-rsa" "AAAAB3NzaC1yc2EAAAADAQABAAABAQCsj2bNKTBSpIYDEGk9KxsGh3mySTRgMtXL583qmBpzeQ+jqCMRgBqB98u3z++J1sKlXHWfM9dyhSevkMwSbhoR8XIq/U0tCNyokEi/ueaBMCvbcTHhO7FcwzY92WK4Yt0aGROY5qX2UKSeOvuP4D6TPqKF1onrSzH9bx9XUf2lEdWT/ia1NEKjunUqu1xOB/StKDHMoX4/OKyIzuS0q/T1zOATthvasJFoPrAjkohTyaDUz2LN5JoH839hViyEG82yB+MjcFV5MU3N1l1QL3cVUCh93xSaua1N85qivl+siMkPGbO5xR/En4iEY6K2XPASUEMaieWVNTRCtJ4S8H+9")
+      (libS.mkPubKey "gitlab.com" "ecdsa-sha2-nistp256" "AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBFSMqzJeV9rUzU4kWitGjeR4PWSa29SPqJ1fVkhtj3Hw9xjLVXVYrU9QlYWrOLXBpQ6KWjbjTDTdDkoohFzgbEY=")
+      (libS.mkPubKey "gitlab.com" "ssh-ed25519" "AAAAC3NzaC1lZDI1NTE5AAAAIAfuCHKVTjquxvt6CM6tdG4SLp1Btn/nOeHHE5UOzRdf")
+      (libS.mkPubKey "git.openwrt.org" "ssh-rsa" "AAAAB3NzaC1yc2EAAAABIwAAAQEAtnM1w/A1uRZqZuYHhw4ASOe9mr3J2qKAa9K9zR8jG+B+NQVtYlIBSkmCFyP6OuydCmoRZ5Gs1I9pl/hEyi7ieEi6g9yww/JbV322cw04Tli46enIYDG1bnSxF6Qt4aXqvPhcObI3z/1Z3XR6weS1fiLDzLvzq+w1gNM77xExD4Mh27LTPkdwOWjkGa5joNx3EQUC3rzwxUqE4fhOT2Ii93h8FSAUXY9C32jkJj9x7vfaJEsCacs6YTiUKKxyzEB+TvFZdUtGtoRThX7UVICUCD2th/r3UeSp8ItWPg/KqzSg2pRfWeYszlVoD59JZ6YCupSjjRqZddghQc94Hev7oQ==")
+      (libS.mkPubKey "git.openwrt.org" "ecdsa-sha2-nistp256" "AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBASOHg+tghASiZF0ClxYb/HEhUcqnD43I86YatRZSUsXNWLEd8yOzjOJExDHHaKtmZtQ/jfEMmoYbCjdEDOYm5g=")
+      (libS.mkPubKey "git.openwrt.org" "ssh-ed25519" "AAAAC3NzaC1lZDI1NTE5AAAAIJZFpKQMaLM8bG9lAPfEpTBExrzuiTKMni7PgktmDbJe")
+      (libS.mkPubKey "git.sr.ht" "ssh-rsa" "AAAAB3NzaC1yc2EAAAADAQABAAABAQDZ+l/lvYmaeOAPeijHL8d4794Am0MOvmXPyvHTtrqvgmvCJB8pen/qkQX2S1fgl9VkMGSNxbp7NF7HmKgs5ajTGV9mB5A5zq+161lcp5+f1qmn3Dp1MWKp/AzejWXKW+dwPBd3kkudDBA1fa3uK6g1gK5nLw3qcuv/V4emX9zv3P2ZNlq9XRvBxGY2KzaCyCXVkL48RVTTJJnYbVdRuq8/jQkDRA8lHvGvKI+jqnljmZi2aIrK9OGT2gkCtfyTw2GvNDV6aZ0bEza7nDLU/I+xmByAOO79R1Uk4EYCvSc1WXDZqhiuO2sZRmVxa0pQSBDn1DB3rpvqPYW+UvKB3SOz")
+      (libS.mkPubKey "git.sr.ht" "ecdsa-sha2-nistp256" "AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBCj6y+cJlqK3BHZRLZuM+KP2zGPrh4H66DacfliU1E2DHAd1GGwF4g1jwu3L8gOZUTIvUptqWTkmglpYhFp4Iy4=")
+      (libS.mkPubKey "git.sr.ht" "ssh-ed25519" "AAAAC3NzaC1lZDI1NTE5AAAAIMZvRd4EtM7R+IHVMWmDkVU3VLQTSwQDSAvW0t2Tkj60")
+    ];
+  };
+}