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3628ad0a9e
This is a small smoke test of each piece (setuid, setgid, caps) of wrappers' functionality. It doesn't try to check for combinations of functionalities or anything more complicated.
80 lines
2.9 KiB
Nix
80 lines
2.9 KiB
Nix
import ./make-test-python.nix ({ pkgs, ... }:
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let
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userUid = 1000;
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usersGid = 100;
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busybox = pkgs : pkgs.busybox.override {
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# Without this, the busybox binary drops euid to ruid for most applets, including id.
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# See https://bugs.busybox.net/show_bug.cgi?id=15101
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extraConfig = "CONFIG_FEATURE_SUID n";
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};
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in
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{
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name = "wrappers";
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nodes.machine = { config, pkgs, ... }: {
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ids.gids.users = usersGid;
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users.users = {
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regular = {
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uid = userUid;
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isNormalUser = true;
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};
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};
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security.wrappers = {
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suidRoot = {
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owner = "root";
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group = "root";
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setuid = true;
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source = "${busybox pkgs}/bin/busybox";
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program = "suid_root_busybox";
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};
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sgidRoot = {
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owner = "root";
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group = "root";
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setgid = true;
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source = "${busybox pkgs}/bin/busybox";
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program = "sgid_root_busybox";
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};
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withChown = {
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owner = "root";
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group = "root";
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source = "${pkgs.libcap}/bin/capsh";
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program = "capsh_with_chown";
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capabilities = "cap_chown+ep";
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};
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};
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};
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testScript =
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''
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def cmd_as_regular(cmd):
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return "su -l regular -c '{0}'".format(cmd)
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def test_as_regular(cmd, expected):
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out = machine.succeed(cmd_as_regular(cmd)).strip()
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assert out == expected, "Expected {0} to output {1}, but got {2}".format(cmd, expected, out)
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test_as_regular('${busybox pkgs}/bin/busybox id -u', '${toString userUid}')
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test_as_regular('${busybox pkgs}/bin/busybox id -ru', '${toString userUid}')
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test_as_regular('${busybox pkgs}/bin/busybox id -g', '${toString usersGid}')
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test_as_regular('${busybox pkgs}/bin/busybox id -rg', '${toString usersGid}')
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test_as_regular('/run/wrappers/bin/suid_root_busybox id -u', '0')
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test_as_regular('/run/wrappers/bin/suid_root_busybox id -ru', '${toString userUid}')
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test_as_regular('/run/wrappers/bin/suid_root_busybox id -g', '${toString usersGid}')
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test_as_regular('/run/wrappers/bin/suid_root_busybox id -rg', '${toString usersGid}')
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test_as_regular('/run/wrappers/bin/sgid_root_busybox id -u', '${toString userUid}')
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test_as_regular('/run/wrappers/bin/sgid_root_busybox id -ru', '${toString userUid}')
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test_as_regular('/run/wrappers/bin/sgid_root_busybox id -g', '0')
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test_as_regular('/run/wrappers/bin/sgid_root_busybox id -rg', '${toString usersGid}')
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# We are only testing the permitted set, because it's easiest to look at with capsh.
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machine.fail(cmd_as_regular('${pkgs.libcap}/bin/capsh --has-p=CAP_CHOWN'))
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machine.fail(cmd_as_regular('${pkgs.libcap}/bin/capsh --has-p=CAP_SYS_ADMIN'))
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machine.succeed(cmd_as_regular('/run/wrappers/bin/capsh_with_chown --has-p=CAP_CHOWN'))
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machine.fail(cmd_as_regular('/run/wrappers/bin/capsh_with_chown --has-p=CAP_SYS_ADMIN'))
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'';
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})
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