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package main
import (
"encoding/json"
"log"
"os"
"path"
"git.gensokyo.uk/security/fortify/dbus"
"git.gensokyo.uk/security/fortify/fst"
"git.gensokyo.uk/security/fortify/sandbox/seccomp"
"git.gensokyo.uk/security/fortify/system"
)
type appInfo struct {
Name string `json:"name"`
Version string `json:"version"`
// passed through to [fst.Config]
ID string `json:"id"`
// passed through to [fst.Config]
Identity int `json:"identity"`
// passed through to [fst.Config]
Groups []string `json:"groups,omitempty"`
// passed through to [fst.Config]
Devel bool `json:"devel,omitempty"`
// passed through to [fst.Config]
Userns bool `json:"userns,omitempty"`
// passed through to [fst.Config]
Net bool `json:"net,omitempty"`
// passed through to [fst.Config]
Device bool `json:"dev,omitempty"`
// passed through to [fst.Config]
Tty bool `json:"tty,omitempty"`
// passed through to [fst.Config]
MapRealUID bool `json:"map_real_uid,omitempty"`
// passed through to [fst.Config]
DirectWayland bool `json:"direct_wayland,omitempty"`
// passed through to [fst.Config]
SystemBus *dbus.Config `json:"system_bus,omitempty"`
// passed through to [fst.Config]
SessionBus *dbus.Config `json:"session_bus,omitempty"`
// passed through to [fst.Config]
Enablements system.Enablement `json:"enablements"`
// passed through to [fst.Config]
Multiarch bool `json:"multiarch,omitempty"`
// passed through to [fst.Config]
Bluetooth bool `json:"bluetooth,omitempty"`
// allow gpu access within sandbox
GPU bool `json:"gpu"`
// store path to nixGL mesa wrappers
Mesa string `json:"mesa,omitempty"`
// store path to nixGL source
NixGL string `json:"nix_gl,omitempty"`
// store path to activate-and-exec script
Launcher string `json:"launcher"`
// store path to /run/current-system
CurrentSystem string `json:"current_system"`
// store path to home-manager activation package
ActivationPackage string `json:"activation_package"`
}
func (app *appInfo) toFst(pathSet *appPathSet, argv []string, flagDropShell bool) *fst.Config {
config := &fst.Config{
ID: app.ID,
Path: argv[0],
Args: argv,
Enablements: app.Enablements,
SystemBus: app.SystemBus,
SessionBus: app.SessionBus,
DirectWayland: app.DirectWayland,
Username: "fortify",
Shell: shellPath,
Data: pathSet.homeDir,
Dir: path.Join("/data/data", app.ID),
Identity: app.Identity,
Groups: app.Groups,
Container: &fst.ContainerConfig{
Hostname: formatHostname(app.Name),
Devel: app.Devel,
Userns: app.Userns,
Net: app.Net,
Device: app.Device,
Tty: app.Tty || flagDropShell,
MapRealUID: app.MapRealUID,
Filesystem: []*fst.FilesystemConfig{
{Src: path.Join(pathSet.nixPath, "store"), Dst: "/nix/store", Must: true},
{Src: pathSet.metaPath, Dst: path.Join(fst.Tmp, "app"), Must: true},
{Src: "/etc/resolv.conf"},
{Src: "/sys/block"},
{Src: "/sys/bus"},
{Src: "/sys/class"},
{Src: "/sys/dev"},
{Src: "/sys/devices"},
},
Link: [][2]string{
{app.CurrentSystem, "/run/current-system"},
{"/run/current-system/sw/bin", "/bin"},
{"/run/current-system/sw/bin", "/usr/bin"},
},
Etc: path.Join(pathSet.cacheDir, "etc"),
AutoEtc: true,
},
ExtraPerms: []*fst.ExtraPermConfig{
{Path: dataHome, Execute: true},
{Ensure: true, Path: pathSet.baseDir, Read: true, Write: true, Execute: true},
},
}
if app.Multiarch {
config.Container.Seccomp |= seccomp.FilterMultiarch
}
if app.Bluetooth {
config.Container.Seccomp |= seccomp.FilterBluetooth
}
return config
}
func loadAppInfo(name string, beforeFail func()) *appInfo {
bundle := new(appInfo)
if f, err := os.Open(name); err != nil {
beforeFail()
log.Fatalf("cannot open bundle: %v", err)
} else if err = json.NewDecoder(f).Decode(&bundle); err != nil {
beforeFail()
log.Fatalf("cannot parse bundle metadata: %v", err)
} else if err = f.Close(); err != nil {
log.Printf("cannot close bundle metadata: %v", err)
// not fatal
}
if bundle.ID == "" {
beforeFail()
log.Fatal("application identifier must not be empty")
}
return bundle
}
func formatHostname(name string) string {
if h, err := os.Hostname(); err != nil {
log.Printf("cannot get hostname: %v", err)
return "fortify-" + name
} else {
return h + "-" + name
}
}
|
