···
1
+
import ./make-test-python.nix ({ pkgs, ... }:
5
+
busybox = pkgs : pkgs.busybox.override {
6
+
# Without this, the busybox binary drops euid to ruid for most applets, including id.
7
+
# See https://bugs.busybox.net/show_bug.cgi?id=15101
8
+
extraConfig = "CONFIG_FEATURE_SUID n";
14
+
nodes.machine = { config, pkgs, ... }: {
15
+
ids.gids.users = usersGid;
20
+
isNormalUser = true;
24
+
security.wrappers = {
29
+
source = "${busybox pkgs}/bin/busybox";
30
+
program = "suid_root_busybox";
36
+
source = "${busybox pkgs}/bin/busybox";
37
+
program = "sgid_root_busybox";
42
+
source = "${pkgs.libcap}/bin/capsh";
43
+
program = "capsh_with_chown";
44
+
capabilities = "cap_chown+ep";
51
+
def cmd_as_regular(cmd):
52
+
return "su -l regular -c '{0}'".format(cmd)
54
+
def test_as_regular(cmd, expected):
55
+
out = machine.succeed(cmd_as_regular(cmd)).strip()
56
+
assert out == expected, "Expected {0} to output {1}, but got {2}".format(cmd, expected, out)
58
+
test_as_regular('${busybox pkgs}/bin/busybox id -u', '${toString userUid}')
59
+
test_as_regular('${busybox pkgs}/bin/busybox id -ru', '${toString userUid}')
60
+
test_as_regular('${busybox pkgs}/bin/busybox id -g', '${toString usersGid}')
61
+
test_as_regular('${busybox pkgs}/bin/busybox id -rg', '${toString usersGid}')
63
+
test_as_regular('/run/wrappers/bin/suid_root_busybox id -u', '0')
64
+
test_as_regular('/run/wrappers/bin/suid_root_busybox id -ru', '${toString userUid}')
65
+
test_as_regular('/run/wrappers/bin/suid_root_busybox id -g', '${toString usersGid}')
66
+
test_as_regular('/run/wrappers/bin/suid_root_busybox id -rg', '${toString usersGid}')
68
+
test_as_regular('/run/wrappers/bin/sgid_root_busybox id -u', '${toString userUid}')
69
+
test_as_regular('/run/wrappers/bin/sgid_root_busybox id -ru', '${toString userUid}')
70
+
test_as_regular('/run/wrappers/bin/sgid_root_busybox id -g', '0')
71
+
test_as_regular('/run/wrappers/bin/sgid_root_busybox id -rg', '${toString usersGid}')
73
+
# We are only testing the permitted set, because it's easiest to look at with capsh.
74
+
machine.fail(cmd_as_regular('${pkgs.libcap}/bin/capsh --has-p=CAP_CHOWN'))
75
+
machine.fail(cmd_as_regular('${pkgs.libcap}/bin/capsh --has-p=CAP_SYS_ADMIN'))
76
+
machine.succeed(cmd_as_regular('/run/wrappers/bin/capsh_with_chown --has-p=CAP_CHOWN'))
77
+
machine.fail(cmd_as_regular('/run/wrappers/bin/capsh_with_chown --has-p=CAP_SYS_ADMIN'))