treewide: rename to hakurei

Fortify makes little sense for a container tool.

Signed-off-by: Ophestra <cat@gensokyo.uk>

5 files changed, 378 insertions, 0 deletions

diff --git a/hst/config.go b/hst/config.go
new file mode 100644
index 00000000..1c3390bf
--- /dev/null
+++ b/hst/config.go
@@ -0,0 +1,83 @@
+// Package hst exports shared types for invoking hakurei.
+package hst
+
+import (
+	"git.gensokyo.uk/security/hakurei/dbus"
+	"git.gensokyo.uk/security/hakurei/system"
+)
+
+const Tmp = "/.hakurei"
+
+// Config is used to seal an app implementation.
+type Config struct {
+	// reverse-DNS style arbitrary identifier string from config;
+	// passed to wayland security-context-v1 as application ID
+	// and used as part of defaults in dbus session proxy
+	ID string `json:"id"`
+
+	// absolute path to executable file
+	Path string `json:"path,omitempty"`
+	// final args passed to container init
+	Args []string `json:"args"`
+
+	// system services to make available in the container
+	Enablements system.Enablement `json:"enablements"`
+
+	// session D-Bus proxy configuration;
+	// nil makes session bus proxy assume built-in defaults
+	SessionBus *dbus.Config `json:"session_bus,omitempty"`
+	// system D-Bus proxy configuration;
+	// nil disables system bus proxy
+	SystemBus *dbus.Config `json:"system_bus,omitempty"`
+	// direct access to wayland socket; when this gets set no attempt is made to attach security-context-v1
+	// and the bare socket is mounted to the sandbox
+	DirectWayland bool `json:"direct_wayland,omitempty"`
+
+	// passwd username in container, defaults to passwd name of target uid or chronos
+	Username string `json:"username,omitempty"`
+	// absolute path to shell, empty for host shell
+	Shell string `json:"shell,omitempty"`
+	// absolute path to home directory in the init mount namespace
+	Data string `json:"data"`
+	// directory to enter and use as home in the container mount namespace, empty for Data
+	Dir string `json:"dir"`
+	// extra acl ops, dispatches before container init
+	ExtraPerms []*ExtraPermConfig `json:"extra_perms,omitempty"`
+
+	// numerical application id, used for init user namespace credentials
+	Identity int `json:"identity"`
+	// list of supplementary groups inherited by container processes
+	Groups []string `json:"groups"`
+
+	// abstract container configuration baseline
+	Container *ContainerConfig `json:"container"`
+}
+
+// ExtraPermConfig describes an acl update op.
+type ExtraPermConfig struct {
+	Ensure  bool   `json:"ensure,omitempty"`
+	Path    string `json:"path"`
+	Read    bool   `json:"r,omitempty"`
+	Write   bool   `json:"w,omitempty"`
+	Execute bool   `json:"x,omitempty"`
+}
+
+func (e *ExtraPermConfig) String() string {
+	buf := make([]byte, 0, 5+len(e.Path))
+	buf = append(buf, '-', '-', '-')
+	if e.Ensure {
+		buf = append(buf, '+')
+	}
+	buf = append(buf, ':')
+	buf = append(buf, []byte(e.Path)...)
+	if e.Read {
+		buf[0] = 'r'
+	}
+	if e.Write {
+		buf[1] = 'w'
+	}
+	if e.Execute {
+		buf[2] = 'x'
+	}
+	return string(buf)
+}
diff --git a/hst/container.go b/hst/container.go
new file mode 100644
index 00000000..796b82e8
--- /dev/null
+++ b/hst/container.go
@@ -0,0 +1,59 @@
+package hst
+
+import (
+	"git.gensokyo.uk/security/hakurei/sandbox/seccomp"
+)
+
+type (
+	// ContainerConfig describes the container configuration baseline to which the app implementation adds upon.
+	ContainerConfig struct {
+		// container hostname
+		Hostname string `json:"hostname,omitempty"`
+
+		// extra seccomp flags
+		Seccomp seccomp.FilterOpts `json:"seccomp"`
+		// allow ptrace and friends
+		Devel bool `json:"devel,omitempty"`
+		// allow userns creation in container
+		Userns bool `json:"userns,omitempty"`
+		// share host net namespace
+		Net bool `json:"net,omitempty"`
+		// allow dangerous terminal I/O
+		Tty bool `json:"tty,omitempty"`
+		// allow multiarch
+		Multiarch bool `json:"multiarch,omitempty"`
+
+		// initial process environment variables
+		Env map[string]string `json:"env"`
+		// map target user uid to privileged user uid in the user namespace
+		MapRealUID bool `json:"map_real_uid"`
+
+		// pass through all devices
+		Device bool `json:"device,omitempty"`
+		// container host filesystem bind mounts
+		Filesystem []*FilesystemConfig `json:"filesystem"`
+		// create symlinks inside container filesystem
+		Link [][2]string `json:"symlink"`
+
+		// read-only /etc directory
+		Etc string `json:"etc,omitempty"`
+		// automatically set up /etc symlinks
+		AutoEtc bool `json:"auto_etc"`
+		// cover these paths or create them if they do not already exist
+		Cover []string `json:"cover"`
+	}
+
+	// FilesystemConfig is an abstract representation of a bind mount.
+	FilesystemConfig struct {
+		// mount point in container, same as src if empty
+		Dst string `json:"dst,omitempty"`
+		// host filesystem path to make available to the container
+		Src string `json:"src"`
+		// do not mount filesystem read-only
+		Write bool `json:"write,omitempty"`
+		// do not disable device files
+		Device bool `json:"dev,omitempty"`
+		// fail if the bind mount cannot be established for any reason
+		Must bool `json:"require,omitempty"`
+	}
+)
diff --git a/hst/info.go b/hst/info.go
new file mode 100644
index 00000000..d887cf2f
--- /dev/null
+++ b/hst/info.go
@@ -0,0 +1,5 @@
+package hst
+
+type Info struct {
+	User int `json:"user"`
+}
diff --git a/hst/template.go b/hst/template.go
new file mode 100644
index 00000000..4d054a49
--- /dev/null
+++ b/hst/template.go
@@ -0,0 +1,91 @@
+package hst
+
+import (
+	"git.gensokyo.uk/security/hakurei/dbus"
+	"git.gensokyo.uk/security/hakurei/sandbox/seccomp"
+	"git.gensokyo.uk/security/hakurei/system"
+)
+
+// Template returns a fully populated instance of Config.
+func Template() *Config {
+	return &Config{
+		ID: "org.chromium.Chromium",
+
+		Path: "/run/current-system/sw/bin/chromium",
+		Args: []string{
+			"chromium",
+			"--ignore-gpu-blocklist",
+			"--disable-smooth-scrolling",
+			"--enable-features=UseOzonePlatform",
+			"--ozone-platform=wayland",
+		},
+
+		Enablements: system.EWayland | system.EDBus | system.EPulse,
+
+		SessionBus: &dbus.Config{
+			See: nil,
+			Talk: []string{"org.freedesktop.Notifications", "org.freedesktop.FileManager1", "org.freedesktop.ScreenSaver",
+				"org.freedesktop.secrets", "org.kde.kwalletd5", "org.kde.kwalletd6", "org.gnome.SessionManager"},
+			Own: []string{"org.chromium.Chromium.*", "org.mpris.MediaPlayer2.org.chromium.Chromium.*",
+				"org.mpris.MediaPlayer2.chromium.*"},
+			Call:      map[string]string{"org.freedesktop.portal.*": "*"},
+			Broadcast: map[string]string{"org.freedesktop.portal.*": "@/org/freedesktop/portal/*"},
+			Log:       false,
+			Filter:    true,
+		},
+		SystemBus: &dbus.Config{
+			See:       nil,
+			Talk:      []string{"org.bluez", "org.freedesktop.Avahi", "org.freedesktop.UPower"},
+			Own:       nil,
+			Call:      nil,
+			Broadcast: nil,
+			Log:       false,
+			Filter:    true,
+		},
+		DirectWayland: false,
+
+		Username: "chronos",
+		Shell:    "/run/current-system/sw/bin/zsh",
+		Data:     "/var/lib/hakurei/u0/org.chromium.Chromium",
+		Dir:      "/data/data/org.chromium.Chromium",
+		ExtraPerms: []*ExtraPermConfig{
+			{Path: "/var/lib/hakurei/u0", Ensure: true, Execute: true},
+			{Path: "/var/lib/hakurei/u0/org.chromium.Chromium", Read: true, Write: true, Execute: true},
+		},
+
+		Identity: 9,
+		Groups:   []string{"video", "dialout", "plugdev"},
+
+		Container: &ContainerConfig{
+			Hostname:   "localhost",
+			Devel:      true,
+			Userns:     true,
+			Net:        true,
+			Device:     true,
+			Seccomp:    seccomp.FilterMultiarch,
+			Tty:        true,
+			Multiarch:  true,
+			MapRealUID: true,
+			// example API credentials pulled from Google Chrome
+			// DO NOT USE THESE IN A REAL BROWSER
+			Env: map[string]string{
+				"GOOGLE_API_KEY":               "AIzaSyBHDrl33hwRp4rMQY0ziRbj8K9LPA6vUCY",
+				"GOOGLE_DEFAULT_CLIENT_ID":     "77185425430.apps.googleusercontent.com",
+				"GOOGLE_DEFAULT_CLIENT_SECRET": "OTJgUOQcT7lO7GsGZq2G4IlT",
+			},
+			Filesystem: []*FilesystemConfig{
+				{Src: "/nix/store"},
+				{Src: "/run/current-system"},
+				{Src: "/run/opengl-driver"},
+				{Src: "/var/db/nix-channels"},
+				{Src: "/var/lib/hakurei/u0/org.chromium.Chromium",
+					Dst: "/data/data/org.chromium.Chromium", Write: true, Must: true},
+				{Src: "/dev/dri", Device: true},
+			},
+			Link:    [][2]string{{"/run/user/65534", "/run/user/150"}},
+			Etc:     "/etc",
+			AutoEtc: true,
+			Cover:   []string{"/var/run/nscd"},
+		},
+	}
+}
diff --git a/hst/template_test.go b/hst/template_test.go
new file mode 100644
index 00000000..74d258de
--- /dev/null
+++ b/hst/template_test.go
@@ -0,0 +1,140 @@
+package hst_test
+
+import (
+	"encoding/json"
+	"testing"
+
+	"git.gensokyo.uk/security/hakurei/hst"
+)
+
+func TestTemplate(t *testing.T) {
+	const want = `{
+	"id": "org.chromium.Chromium",
+	"path": "/run/current-system/sw/bin/chromium",
+	"args": [
+		"chromium",
+		"--ignore-gpu-blocklist",
+		"--disable-smooth-scrolling",
+		"--enable-features=UseOzonePlatform",
+		"--ozone-platform=wayland"
+	],
+	"enablements": 13,
+	"session_bus": {
+		"see": null,
+		"talk": [
+			"org.freedesktop.Notifications",
+			"org.freedesktop.FileManager1",
+			"org.freedesktop.ScreenSaver",
+			"org.freedesktop.secrets",
+			"org.kde.kwalletd5",
+			"org.kde.kwalletd6",
+			"org.gnome.SessionManager"
+		],
+		"own": [
+			"org.chromium.Chromium.*",
+			"org.mpris.MediaPlayer2.org.chromium.Chromium.*",
+			"org.mpris.MediaPlayer2.chromium.*"
+		],
+		"call": {
+			"org.freedesktop.portal.*": "*"
+		},
+		"broadcast": {
+			"org.freedesktop.portal.*": "@/org/freedesktop/portal/*"
+		},
+		"filter": true
+	},
+	"system_bus": {
+		"see": null,
+		"talk": [
+			"org.bluez",
+			"org.freedesktop.Avahi",
+			"org.freedesktop.UPower"
+		],
+		"own": null,
+		"call": null,
+		"broadcast": null,
+		"filter": true
+	},
+	"username": "chronos",
+	"shell": "/run/current-system/sw/bin/zsh",
+	"data": "/var/lib/hakurei/u0/org.chromium.Chromium",
+	"dir": "/data/data/org.chromium.Chromium",
+	"extra_perms": [
+		{
+			"ensure": true,
+			"path": "/var/lib/hakurei/u0",
+			"x": true
+		},
+		{
+			"path": "/var/lib/hakurei/u0/org.chromium.Chromium",
+			"r": true,
+			"w": true,
+			"x": true
+		}
+	],
+	"identity": 9,
+	"groups": [
+		"video",
+		"dialout",
+		"plugdev"
+	],
+	"container": {
+		"hostname": "localhost",
+		"seccomp": 32,
+		"devel": true,
+		"userns": true,
+		"net": true,
+		"tty": true,
+		"multiarch": true,
+		"env": {
+			"GOOGLE_API_KEY": "AIzaSyBHDrl33hwRp4rMQY0ziRbj8K9LPA6vUCY",
+			"GOOGLE_DEFAULT_CLIENT_ID": "77185425430.apps.googleusercontent.com",
+			"GOOGLE_DEFAULT_CLIENT_SECRET": "OTJgUOQcT7lO7GsGZq2G4IlT"
+		},
+		"map_real_uid": true,
+		"device": true,
+		"filesystem": [
+			{
+				"src": "/nix/store"
+			},
+			{
+				"src": "/run/current-system"
+			},
+			{
+				"src": "/run/opengl-driver"
+			},
+			{
+				"src": "/var/db/nix-channels"
+			},
+			{
+				"dst": "/data/data/org.chromium.Chromium",
+				"src": "/var/lib/hakurei/u0/org.chromium.Chromium",
+				"write": true,
+				"require": true
+			},
+			{
+				"src": "/dev/dri",
+				"dev": true
+			}
+		],
+		"symlink": [
+			[
+				"/run/user/65534",
+				"/run/user/150"
+			]
+		],
+		"etc": "/etc",
+		"auto_etc": true,
+		"cover": [
+			"/var/run/nscd"
+		]
+	}
+}`
+
+	if p, err := json.MarshalIndent(hst.Template(), "", "\t"); err != nil {
+		t.Fatalf("cannot marshal: %v", err)
+	} else if s := string(p); s != want {
+		t.Fatalf("Template:\n%s\nwant:\n%s",
+			s, want)
+	}
+}