pyrox.dev
1{ pkgs, lib, ... }:
2
3{
4 name = "gnupg";
5 meta = with lib.maintainers; {
6 maintainers = [ rnhmjoj ];
7 };
8
9 # server for testing SSH
10 nodes.server =
11 { ... }:
12 {
13 imports = [ ../modules/profiles/minimal.nix ];
14
15 users.users.alice.isNormalUser = true;
16 services.openssh.enable = true;
17 };
18
19 # machine for testing GnuPG
20 nodes.machine =
21 { pkgs, ... }:
22 {
23 imports = [ ../modules/profiles/minimal.nix ];
24
25 users.users.alice.isNormalUser = true;
26 services.getty.autologinUser = "alice";
27
28 environment.shellInit = ''
29 # preset a key passphrase in gpg-agent
30 preset_key() {
31 # find all keys
32 case "$1" in
33 ssh) grips=$(awk '/^[0-9A-F]/{print $1}' "''${GNUPGHOME:-$HOME/.gnupg}/sshcontrol") ;;
34 pgp) grips=$(gpg --with-keygrip --list-secret-keys | awk '/Keygrip/{print $3}') ;;
35 esac
36
37 # try to preset the passphrase for each key found
38 for grip in $grips; do
39 "$(gpgconf --list-dirs libexecdir)/gpg-preset-passphrase" -c -P "$2" "$grip"
40 done
41 }
42 '';
43
44 programs.gnupg.agent.enable = true;
45 programs.gnupg.agent.enableSSHSupport = true;
46 };
47
48 testScript = ''
49 import shlex
50
51
52 def as_alice(command: str) -> str:
53 """
54 Wraps a command to run it as Alice in a login shell
55 """
56 quoted = shlex.quote(command)
57 return "su --login alice --command " + quoted
58
59
60 start_all()
61
62 with subtest("Wait for the autologin"):
63 machine.wait_until_tty_matches("1", "alice@machine")
64
65 with subtest("Can generate a PGP key"):
66 # Note: this needs a tty because of pinentry
67 machine.send_chars("gpg --gen-key\n")
68 machine.wait_until_tty_matches("1", "Real name:")
69 machine.send_chars("Alice\n")
70 machine.wait_until_tty_matches("1", "Email address:")
71 machine.send_chars("alice@machine\n")
72 machine.wait_until_tty_matches("1", "Change")
73 machine.send_chars("O\n")
74 machine.wait_until_tty_matches("1", "Please enter")
75 machine.send_chars("pgp_p4ssphrase")
76 machine.send_key("tab")
77 machine.send_chars("pgp_p4ssphrase")
78 machine.wait_until_tty_matches("1", "Passphrases match")
79 machine.send_chars("\n")
80 machine.wait_until_tty_matches("1", "public and secret key created")
81
82 with subtest("Confirm the key is in the keyring"):
83 machine.wait_until_succeeds(as_alice("gpg --list-secret-keys | grep -q alice@machine"))
84
85 with subtest("Can generate and add an SSH key"):
86 machine.succeed(as_alice("ssh-keygen -t ed25519 -f alice -N ssh_p4ssphrase"))
87
88 # Note: apparently this must be run before using the OpenSSH agent
89 # socket for the first time in a tty. It's not needed for `ssh`
90 # because there's a hook that calls it automatically (only in NixOS).
91 machine.send_chars("gpg-connect-agent updatestartuptty /bye\n")
92
93 # Note: again, this needs a tty because of pinentry
94 machine.send_chars("ssh-add alice\n")
95 machine.wait_until_tty_matches("1", "Enter passphrase")
96 machine.send_chars("ssh_p4ssphrase\n")
97 machine.wait_until_tty_matches("1", "Please enter")
98 machine.send_chars("ssh_agent_p4ssphrase")
99 machine.send_key("tab")
100 machine.send_chars("ssh_agent_p4ssphrase")
101 machine.wait_until_tty_matches("1", "Passphrases match")
102 machine.send_chars("\n")
103
104 with subtest("Confirm the SSH key has been registered"):
105 machine.wait_until_succeeds(as_alice("ssh-add -l | grep -q alice@machine"))
106
107 with subtest("Can preset the key passphrases in the agent"):
108 machine.succeed(as_alice("echo allow-preset-passphrase > .gnupg/gpg-agent.conf"))
109 machine.succeed(as_alice("pkill gpg-agent"))
110 machine.succeed(as_alice("preset_key pgp pgp_p4ssphrase"))
111 machine.succeed(as_alice("preset_key ssh ssh_agent_p4ssphrase"))
112
113 with subtest("Can encrypt and decrypt a message"):
114 machine.succeed(as_alice("echo Hello | gpg -e -r alice | gpg -d | grep -q Hello"))
115
116 with subtest("Can log into the server"):
117 # Install Alice's public key
118 public_key = machine.succeed(as_alice("cat alice.pub"))
119 server.succeed("mkdir /etc/ssh/authorized_keys.d")
120 server.succeed(f"printf '{public_key}' > /etc/ssh/authorized_keys.d/alice")
121
122 server.wait_for_open_port(22)
123 machine.succeed(as_alice("ssh -i alice -o StrictHostKeyChecking=no server exit"))
124 '';
125}