Ophestra Umiker
ad7e389eee
All checks were successful
test / test (push) Successful in 20s
This test seals App against a deterministic os stub and checks the resulting sys and bwrap values against known correct ones. The effects of sys and bwrap on the OS and sandbox is deterministic and tested in their own respective packages. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
380 lines
14 KiB
Go
380 lines
14 KiB
Go
package app_test
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import (
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"fmt"
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"io/fs"
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"os/user"
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"reflect"
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"strconv"
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"testing"
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"git.ophivana.moe/security/fortify/acl"
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"git.ophivana.moe/security/fortify/helper/bwrap"
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"git.ophivana.moe/security/fortify/internal"
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"git.ophivana.moe/security/fortify/internal/app"
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"git.ophivana.moe/security/fortify/internal/system"
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)
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func TestApp(t *testing.T) {
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testCases := []struct {
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name string
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config *app.Config
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id app.ID
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wantSys *system.I
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wantBwrap *bwrap.Config
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}{
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{
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"permissive defaults no enablements",
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&app.Config{
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User: "chronos",
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Command: make([]string, 0),
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Method: "sudo",
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},
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app.ID{
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0x4a, 0x45, 0x0b, 0x65,
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0x96, 0xd7, 0xbc, 0x15,
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0xbd, 0x01, 0x78, 0x0e,
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0xb9, 0xa6, 0x07, 0xac,
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},
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system.New(150).
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Ensure("/tmp/fortify.1971", 0701).
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Ephemeral(system.Process, "/tmp/fortify.1971/4a450b6596d7bc15bd01780eb9a607ac", 0701).
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Ensure("/tmp/fortify.1971/tmpdir", 0700).UpdatePermType(system.User, "/tmp/fortify.1971/tmpdir", acl.Execute).
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Ensure("/tmp/fortify.1971/tmpdir/150", 01700).UpdatePermType(system.User, "/tmp/fortify.1971/tmpdir/150", acl.Read, acl.Write, acl.Execute).
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Ensure("/run/user/1971/fortify", 0700).UpdatePermType(system.User, "/run/user/1971/fortify", acl.Execute).
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Ensure("/run/user/1971", 0700).UpdatePermType(system.User, "/run/user/1971", acl.Execute). // this is ordered as is because the previous Ensure only calls mkdir if XDG_RUNTIME_DIR is unset
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Ephemeral(system.Process, "/run/user/1971/fortify/4a450b6596d7bc15bd01780eb9a607ac", 0700).UpdatePermType(system.Process, "/run/user/1971/fortify/4a450b6596d7bc15bd01780eb9a607ac", acl.Execute).
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WriteType(system.Process, "/tmp/fortify.1971/4a450b6596d7bc15bd01780eb9a607ac/passwd", "chronos:x:65534:65534:Fortify:/home/chronos:/run/current-system/sw/bin/zsh\n").
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WriteType(system.Process, "/tmp/fortify.1971/4a450b6596d7bc15bd01780eb9a607ac/group", "fortify:x:65534:\n"),
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(&bwrap.Config{
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Net: true,
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UserNS: true,
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Clearenv: true,
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SetEnv: map[string]string{
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"HOME": "/home/chronos",
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"SHELL": "/run/current-system/sw/bin/zsh",
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"TERM": "xterm-256color",
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"USER": "chronos",
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"XDG_RUNTIME_DIR": "/run/user/150",
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"XDG_SESSION_CLASS": "user",
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"XDG_SESSION_TYPE": "tty"},
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Chmod: make(bwrap.ChmodConfig),
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DieWithParent: true,
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AsInit: true,
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}).SetUID(65534).SetGID(65534).
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Procfs("/proc").DevTmpfs("/dev").Mqueue("/dev/mqueue").
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Tmpfs("/dev/fortify", 4096).
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Bind("/bin", "/bin", false, true).
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Bind("/boot", "/boot", false, true).
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Bind("/etc", "/dev/fortify/etc").
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Bind("/home", "/home", false, true).
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Bind("/lib", "/lib", false, true).
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Bind("/lib64", "/lib64", false, true).
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Bind("/nix", "/nix", false, true).
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Bind("/root", "/root", false, true).
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Bind("/srv", "/srv", false, true).
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Bind("/sys", "/sys", false, true).
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Bind("/usr", "/usr", false, true).
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Bind("/var", "/var", false, true).
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Bind("/run/agetty.reload", "/run/agetty.reload", false, true).
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Bind("/run/binfmt", "/run/binfmt", false, true).
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Bind("/run/booted-system", "/run/booted-system", false, true).
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Bind("/run/credentials", "/run/credentials", false, true).
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Bind("/run/cryptsetup", "/run/cryptsetup", false, true).
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Bind("/run/current-system", "/run/current-system", false, true).
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Bind("/run/host", "/run/host", false, true).
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Bind("/run/keys", "/run/keys", false, true).
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Bind("/run/libvirt", "/run/libvirt", false, true).
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Bind("/run/libvirtd.pid", "/run/libvirtd.pid", false, true).
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Bind("/run/lock", "/run/lock", false, true).
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Bind("/run/log", "/run/log", false, true).
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Bind("/run/lvm", "/run/lvm", false, true).
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Bind("/run/mount", "/run/mount", false, true).
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Bind("/run/NetworkManager", "/run/NetworkManager", false, true).
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Bind("/run/nginx", "/run/nginx", false, true).
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Bind("/run/nixos", "/run/nixos", false, true).
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Bind("/run/nscd", "/run/nscd", false, true).
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Bind("/run/opengl-driver", "/run/opengl-driver", false, true).
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Bind("/run/pppd", "/run/pppd", false, true).
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Bind("/run/resolvconf", "/run/resolvconf", false, true).
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Bind("/run/sddm", "/run/sddm", false, true).
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Bind("/run/store", "/run/store", false, true).
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Bind("/run/syncoid", "/run/syncoid", false, true).
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Bind("/run/system", "/run/system", false, true).
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Bind("/run/systemd", "/run/systemd", false, true).
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Bind("/run/tmpfiles.d", "/run/tmpfiles.d", false, true).
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Bind("/run/udev", "/run/udev", false, true).
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Bind("/run/udisks2", "/run/udisks2", false, true).
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Bind("/run/utmp", "/run/utmp", false, true).
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Bind("/run/virtlogd.pid", "/run/virtlogd.pid", false, true).
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Bind("/run/wrappers", "/run/wrappers", false, true).
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Bind("/run/zed.pid", "/run/zed.pid", false, true).
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Bind("/run/zed.state", "/run/zed.state", false, true).
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Symlink("/dev/fortify/etc/alsa", "/etc/alsa").
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Symlink("/dev/fortify/etc/bashrc", "/etc/bashrc").
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Symlink("/dev/fortify/etc/binfmt.d", "/etc/binfmt.d").
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Symlink("/dev/fortify/etc/dbus-1", "/etc/dbus-1").
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Symlink("/dev/fortify/etc/default", "/etc/default").
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Symlink("/dev/fortify/etc/ethertypes", "/etc/ethertypes").
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Symlink("/dev/fortify/etc/fonts", "/etc/fonts").
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Symlink("/dev/fortify/etc/fstab", "/etc/fstab").
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Symlink("/dev/fortify/etc/fuse.conf", "/etc/fuse.conf").
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Symlink("/dev/fortify/etc/host.conf", "/etc/host.conf").
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Symlink("/dev/fortify/etc/hostid", "/etc/hostid").
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Symlink("/dev/fortify/etc/hostname", "/etc/hostname").
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Symlink("/dev/fortify/etc/hostname.CHECKSUM", "/etc/hostname.CHECKSUM").
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Symlink("/dev/fortify/etc/hosts", "/etc/hosts").
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Symlink("/dev/fortify/etc/inputrc", "/etc/inputrc").
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Symlink("/dev/fortify/etc/ipsec.d", "/etc/ipsec.d").
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Symlink("/dev/fortify/etc/issue", "/etc/issue").
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Symlink("/dev/fortify/etc/kbd", "/etc/kbd").
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Symlink("/dev/fortify/etc/libblockdev", "/etc/libblockdev").
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Symlink("/dev/fortify/etc/locale.conf", "/etc/locale.conf").
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Symlink("/dev/fortify/etc/localtime", "/etc/localtime").
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Symlink("/dev/fortify/etc/login.defs", "/etc/login.defs").
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Symlink("/dev/fortify/etc/lsb-release", "/etc/lsb-release").
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Symlink("/dev/fortify/etc/lvm", "/etc/lvm").
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Symlink("/dev/fortify/etc/machine-id", "/etc/machine-id").
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Symlink("/dev/fortify/etc/man_db.conf", "/etc/man_db.conf").
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Symlink("/dev/fortify/etc/modprobe.d", "/etc/modprobe.d").
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Symlink("/dev/fortify/etc/modules-load.d", "/etc/modules-load.d").
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Symlink("/proc/mounts", "/etc/mtab").
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Symlink("/dev/fortify/etc/nanorc", "/etc/nanorc").
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Symlink("/dev/fortify/etc/netgroup", "/etc/netgroup").
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Symlink("/dev/fortify/etc/NetworkManager", "/etc/NetworkManager").
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Symlink("/dev/fortify/etc/nix", "/etc/nix").
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Symlink("/dev/fortify/etc/nixos", "/etc/nixos").
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Symlink("/dev/fortify/etc/NIXOS", "/etc/NIXOS").
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Symlink("/dev/fortify/etc/nscd.conf", "/etc/nscd.conf").
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Symlink("/dev/fortify/etc/nsswitch.conf", "/etc/nsswitch.conf").
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Symlink("/dev/fortify/etc/opensnitchd", "/etc/opensnitchd").
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Symlink("/dev/fortify/etc/os-release", "/etc/os-release").
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Symlink("/dev/fortify/etc/pam", "/etc/pam").
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Symlink("/dev/fortify/etc/pam.d", "/etc/pam.d").
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Symlink("/dev/fortify/etc/pipewire", "/etc/pipewire").
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Symlink("/dev/fortify/etc/pki", "/etc/pki").
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Symlink("/dev/fortify/etc/polkit-1", "/etc/polkit-1").
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Symlink("/dev/fortify/etc/profile", "/etc/profile").
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Symlink("/dev/fortify/etc/protocols", "/etc/protocols").
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Symlink("/dev/fortify/etc/qemu", "/etc/qemu").
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Symlink("/dev/fortify/etc/resolv.conf", "/etc/resolv.conf").
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Symlink("/dev/fortify/etc/resolvconf.conf", "/etc/resolvconf.conf").
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Symlink("/dev/fortify/etc/rpc", "/etc/rpc").
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Symlink("/dev/fortify/etc/samba", "/etc/samba").
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Symlink("/dev/fortify/etc/sddm.conf", "/etc/sddm.conf").
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Symlink("/dev/fortify/etc/secureboot", "/etc/secureboot").
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Symlink("/dev/fortify/etc/services", "/etc/services").
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Symlink("/dev/fortify/etc/set-environment", "/etc/set-environment").
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Symlink("/dev/fortify/etc/shadow", "/etc/shadow").
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Symlink("/dev/fortify/etc/shells", "/etc/shells").
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Symlink("/dev/fortify/etc/ssh", "/etc/ssh").
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Symlink("/dev/fortify/etc/ssl", "/etc/ssl").
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Symlink("/dev/fortify/etc/static", "/etc/static").
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Symlink("/dev/fortify/etc/subgid", "/etc/subgid").
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Symlink("/dev/fortify/etc/subuid", "/etc/subuid").
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Symlink("/dev/fortify/etc/sudoers", "/etc/sudoers").
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Symlink("/dev/fortify/etc/sysctl.d", "/etc/sysctl.d").
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Symlink("/dev/fortify/etc/systemd", "/etc/systemd").
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Symlink("/dev/fortify/etc/terminfo", "/etc/terminfo").
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Symlink("/dev/fortify/etc/tmpfiles.d", "/etc/tmpfiles.d").
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Symlink("/dev/fortify/etc/udev", "/etc/udev").
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Symlink("/dev/fortify/etc/udisks2", "/etc/udisks2").
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Symlink("/dev/fortify/etc/UPower", "/etc/UPower").
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Symlink("/dev/fortify/etc/vconsole.conf", "/etc/vconsole.conf").
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Symlink("/dev/fortify/etc/X11", "/etc/X11").
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Symlink("/dev/fortify/etc/zfs", "/etc/zfs").
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Symlink("/dev/fortify/etc/zinputrc", "/etc/zinputrc").
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Symlink("/dev/fortify/etc/zoneinfo", "/etc/zoneinfo").
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Symlink("/dev/fortify/etc/zprofile", "/etc/zprofile").
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Symlink("/dev/fortify/etc/zshenv", "/etc/zshenv").
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Symlink("/dev/fortify/etc/zshrc", "/etc/zshrc").
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Bind("/tmp/fortify.1971/tmpdir/150", "/tmp", false, true).
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Tmpfs("/tmp/fortify.1971", 1048576).
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Tmpfs("/run/user", 1048576).
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Tmpfs("/run/user/150", 8388608).
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Bind("/tmp/fortify.1971/4a450b6596d7bc15bd01780eb9a607ac/passwd", "/etc/passwd").
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Bind("/tmp/fortify.1971/4a450b6596d7bc15bd01780eb9a607ac/group", "/etc/group").
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Tmpfs("/var/run/nscd", 8192),
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},
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}
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for _, tc := range testCases {
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t.Run(tc.name, func(t *testing.T) {
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a := app.NewWithID(tc.id, new(stub))
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if !t.Run("seal", func(t *testing.T) {
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if err := a.Seal(tc.config); err != nil {
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t.Errorf("Seal: error = %v", err)
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}
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}) {
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return
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}
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gotSys, gotBwrap := app.AppSystemBwrap(a)
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t.Run("compare sys", func(t *testing.T) {
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if !gotSys.Equal(tc.wantSys) {
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t.Errorf("Seal: sys = %#v, want %#v",
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gotSys, tc.wantSys)
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}
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})
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t.Run("compare bwrap", func(t *testing.T) {
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if !reflect.DeepEqual(gotBwrap, tc.wantBwrap) {
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t.Errorf("seal: bwrap = %#v, want %#v",
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gotBwrap, tc.wantBwrap)
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}
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})
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})
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}
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}
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// fs methods are not implemented using a real FS
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// to help better understand filesystem access behaviour
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type stub struct {
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lookPathErr map[string]error
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usernameErr map[string]error
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}
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func (s *stub) Geteuid() int {
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return 1971
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}
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func (s *stub) LookupEnv(key string) (string, bool) {
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switch key {
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case "SHELL":
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return "/run/current-system/sw/bin/zsh", true
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case "TERM":
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return "xterm-256color", true
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default:
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panic(fmt.Sprintf("attempted to access unexpected environment variable %q", key))
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}
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}
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func (s *stub) TempDir() string {
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return "/tmp"
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}
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func (s *stub) LookPath(file string) (string, error) {
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if s.lookPathErr != nil {
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if err, ok := s.lookPathErr[file]; ok {
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return "", err
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}
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}
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switch file {
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case "sudo":
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return "/run/wrappers/bin/sudo", nil
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default:
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panic(fmt.Sprintf("attempted to look up unexpected executable %q", file))
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}
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}
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func (s *stub) Executable() (string, error) {
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return "/home/ophestra/.nix-profile/bin/fortify", nil
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}
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func (s *stub) Lookup(username string) (*user.User, error) {
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if s.usernameErr != nil {
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if err, ok := s.usernameErr[username]; ok {
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return nil, err
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}
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}
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switch username {
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case "chronos":
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return &user.User{
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Uid: "150",
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Gid: "101",
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Username: "chronos",
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HomeDir: "/home/chronos",
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}, nil
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default:
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return nil, user.UnknownUserError(username)
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}
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}
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func (s *stub) ReadDir(name string) ([]fs.DirEntry, error) {
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switch name {
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case "/":
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return stubDirEntries("bin", "boot", "dev", "etc", "home", "lib",
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"lib64", "nix", "proc", "root", "run", "srv", "sys", "tmp", "usr", "var")
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case "/run":
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return stubDirEntries("agetty.reload", "binfmt", "booted-system",
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"credentials", "cryptsetup", "current-system", "dbus", "host", "keys",
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"libvirt", "libvirtd.pid", "lock", "log", "lvm", "mount", "NetworkManager",
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"nginx", "nixos", "nscd", "opengl-driver", "pppd", "resolvconf", "sddm",
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"store", "syncoid", "system", "systemd", "tmpfiles.d", "udev", "udisks2",
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"user", "utmp", "virtlogd.pid", "wrappers", "zed.pid", "zed.state")
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case "/etc":
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return stubDirEntries("alsa", "bashrc", "binfmt.d", "dbus-1", "default",
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"ethertypes", "fonts", "fstab", "fuse.conf", "group", "host.conf", "hostid",
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"hostname", "hostname.CHECKSUM", "hosts", "inputrc", "ipsec.d", "issue", "kbd",
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"libblockdev", "locale.conf", "localtime", "login.defs", "lsb-release", "lvm",
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"machine-id", "man_db.conf", "modprobe.d", "modules-load.d", "mtab", "nanorc",
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"netgroup", "NetworkManager", "nix", "nixos", "NIXOS", "nscd.conf", "nsswitch.conf",
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"opensnitchd", "os-release", "pam", "pam.d", "passwd", "pipewire", "pki", "polkit-1",
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"profile", "protocols", "qemu", "resolv.conf", "resolvconf.conf", "rpc", "samba",
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"sddm.conf", "secureboot", "services", "set-environment", "shadow", "shells", "ssh",
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"ssl", "static", "subgid", "subuid", "sudoers", "sysctl.d", "systemd", "terminfo",
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"tmpfiles.d", "udev", "udisks2", "UPower", "vconsole.conf", "X11", "zfs", "zinputrc",
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"zoneinfo", "zprofile", "zshenv", "zshrc")
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default:
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panic(fmt.Sprintf("attempted to read unexpected directory %q", name))
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}
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}
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func (s *stub) Stat(name string) (fs.FileInfo, error) {
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switch name {
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case "/var/run/nscd":
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return nil, nil
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default:
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panic(fmt.Sprintf("attempted to stat unexpected path %q", name))
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}
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}
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func (s *stub) Open(name string) (fs.File, error) {
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switch name {
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default:
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panic(fmt.Sprintf("attempted to open unexpected file %q", name))
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}
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}
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func (s *stub) Exit(code int) {
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panic("called exit on stub with code " + strconv.Itoa(code))
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}
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func (s *stub) Paths() internal.Paths {
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return internal.Paths{
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SharePath: "/tmp/fortify.1971",
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RuntimePath: "/run/user/1971",
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RunDirPath: "/run/user/1971/fortify",
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}
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}
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func stubDirEntries(names ...string) (e []fs.DirEntry, err error) {
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e = make([]fs.DirEntry, len(names))
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for i, name := range names {
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e[i] = stubDirEntryPath(name)
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}
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return
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}
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type stubDirEntryPath string
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func (p stubDirEntryPath) Name() string {
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return string(p)
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}
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func (p stubDirEntryPath) IsDir() bool {
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panic("attempted to call IsDir")
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}
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func (p stubDirEntryPath) Type() fs.FileMode {
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panic("attempted to call Type")
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}
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func (p stubDirEntryPath) Info() (fs.FileInfo, error) {
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panic("attempted to call Info")
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}
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