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migrate other citadel-tools to external repository

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Bruce Leidl 2018-12-14 10:10:15 -05:00
parent 18ba0fc4a3
commit 109f007e33
45 changed files with 7549 additions and 121 deletions
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/target **/target
**/*.rs.bk **/*.rs.bk

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16
citadel-desktopd/Cargo.toml Normal file
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[package]
name = "citadel-desktopd"
version = "0.1.0"
authors = ["brl@subgraph.com"]
homepage = "https://github.com/subgraph/citadel"
[dependencies]
failure = "0.1.1"
lazy_static = "1.0"
log = "0.4.0"
env_logger = "0.5.3"
inotify = "0.5"
toml = "0.4.5"
serde_derive = "1.0.27"
serde = "1.0.27"
nix = "0.10.0"

6
citadel-desktopd/conf/citadel-desktopd.conf Normal file
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[options]
exec_prefix="/usr/bin/realms run --"
target_directory="/home/citadel/.local/share/applications"
[[sources]]
path="/run/realms/current.realm/rootfs/usr/share/applications"

5
citadel-desktopd/conf/citadel-desktopd.service Normal file
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[Unit]
Description=Desktop Integration Manager
[Service]
ExecStart=/usr/libexec/citadel-desktopd /usr/share/citadel/citadel-desktopd.conf

120
citadel-desktopd/src/config.rs Normal file
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use std::path::{Path,PathBuf};
use std::fs::File;
use std::io::Read;
use Result;
use toml;
#[derive(Clone)]
pub struct Config {
exec_prefix: String,
target_directory: PathBuf,
source_paths: Vec<PathBuf>,
}
impl Config {
pub fn from_path<P: AsRef<Path>>(path: P) -> Result<Config> {
let toml = ConfigToml::from_path(path)?;
let config = toml.to_config()?;
Ok(config)
}
pub fn exec_prefix(&self) -> &str {
self.exec_prefix.as_ref()
}
pub fn target_directory(&self) -> &Path {
self.target_directory.as_ref()
}
pub fn source_paths(&self) -> &Vec<PathBuf> {
self.source_paths.as_ref()
}
}
#[derive(Deserialize)]
struct ConfigToml {
options: Option<Options>,
sources: Option<Vec<Source>>,
}
#[derive(Deserialize)]
struct Options {
exec_prefix: Option<String>,
target_directory: Option<String>,
}
impl Options {
fn exec_prefix(&self) -> Result<&str> {
match self.exec_prefix {
Some(ref s) => Ok(s.as_str()),
None => Err(format_err!("missing 'exec_prefix=' field")),
}
}
fn target_directory(&self) -> Result<&str> {
match self.target_directory {
Some(ref s) => Ok(s.as_str()),
None => Err(format_err!("missing 'target_directory=' field")),
}
}
}
#[derive(Deserialize,Clone)]
struct Source {
path: Option<String>,
}
impl Source {
fn path(&self) -> Result<&str> {
match self.path {
Some(ref s) => Ok(s.as_str()),
None => Err(format_err!("missing 'path=' field")),
}
}
}
fn load_as_string(path: &Path) -> Result<String> {
let mut f = File::open(path)?;
let mut buffer = String::new();
f.read_to_string(&mut buffer)?;
Ok(buffer)
}
impl ConfigToml {
fn from_path<P: AsRef<Path>>(path: P) -> Result<ConfigToml> {
let s = load_as_string(path.as_ref())?;
let config = toml::from_str::<ConfigToml>(&s)?;
Ok(config)
}
fn options(&self) -> Result<&Options> {
self.options.as_ref()
.ok_or(format_err!("missing '[options]' section"))
}
fn sources(&self) -> Result<Vec<Source>> {
match self.sources {
Some(ref srcs) => Ok(srcs.clone()),
None => Err(format_err!("missing '[[sources]]' section(s)")),
}
}
fn to_config(&self) -> Result<Config> {
let options = self.options()?;
let exec_prefix = options.exec_prefix()?.to_string() + " ";
let target_path = options.target_directory()?.to_string();
let target_directory = PathBuf::from(target_path);
let mut source_paths = Vec::new();
for src in self.sources()? {
let path = src.path()?;
source_paths.push(PathBuf::from(path));
}
Ok(Config{
exec_prefix,
target_directory,
source_paths,
})
}
}

188
citadel-desktopd/src/desktop.rs Normal file
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use std::io::Write;
use std::fs::File;
use std::path::Path;
use std::collections::HashMap;
use Result;
pub struct DesktopFile {
filename: String,
lines: Vec<Line>,
// map from key of key/value pair to index of line in lines vector
main_map: HashMap<String, usize>,
// map from group name to map of key/value -> index
groups: HashMap<String,HashMap<String,usize>>,
}
impl DesktopFile {
pub fn write_to_dir<P: AsRef<Path>>(&self, directory: P) -> Result<()> {
let mut path = directory.as_ref().to_path_buf();
path.push(self.filename.as_str());
let f = File::create(&path)?;
self.write_to(f)?;
Ok(())
}
pub fn write_to<W: Write>(&self, mut w: W) -> Result<()> {
for line in &self.lines {
line.write_to(&mut w)?;
}
Ok(())
}
pub fn filename(&self) -> &str {
self.filename.as_ref()
}
//
// Conditions for translating a .desktop entry
//
// Type=Application // Mandatory 'Type' key must be Application
// NotShowIn= // If 'NotShowIn' key is present, must not contain GNOME
// OnlyShowIn= // If 'OnlyShowIn' key is present, must contain 'GNOME'
// Terminal=false // If 'Terminal' key is present, must be false
// Hidden=false // If 'Hidden' key is present, must be false
//
pub fn is_showable(&self) -> bool {
self.is_application_type() && self.show_in_gnome() &&
!(self.needs_terminal() || self.is_hidden())
}
fn needs_terminal(&self) -> bool {
self.key_exists_and_not_false("Terminal")
}
fn is_application_type(&self) -> bool {
if let Some(t) = self.get_key_val("Type") {
return t == "Application"
}
false
}
fn show_in_gnome(&self) -> bool {
if self.key_exists("NotShowIn") && self.key_value_contains("NotShowIn", "GNOME") {
return false;
}
if self.key_exists("OnlyShowIn") && !self.key_value_contains("OnlyShowIn", "GNOME") {
return false;
}
true
}
fn key_value_contains(&self, key: &str, s: &str) -> bool {
match self.get_key_val(key) {
Some(val) => val.contains(s),
None => false,
}
}
fn key_exists(&self, key: &str) -> bool {
self.main_map.contains_key(key)
}
fn is_hidden(&self) -> bool {
self.key_exists_and_not_false("Hidden")
}
fn key_exists_and_not_false(&self, key: &str) -> bool {
if let Some(s) = self.get_key_val(key) {
if s != "false" {
return true;
}
}
false
}
fn get_key_val(&self, key: &str) -> Option<&str> {
if let Some(idx) = self.main_map.get(key) {
match self.lines[*idx] {
Line::KeyValue(_, ref v) => return Some(v),
ref line => panic!("Key lookup on '{}' returned wrong line type: {:?}", key, line),
}
}
None
}
pub fn new(filename: &str) -> DesktopFile {
DesktopFile {
filename: filename.to_string(),
lines: Vec::new(),
main_map: HashMap::new(),
groups: HashMap::new(),
}
}
pub fn add_line(&mut self, line: Line) {
if line.is_key_value_type() {
let idx = self.lines.len();
self.main_map.insert(line.get_key_string(), idx);
}
self.lines.push(line);
}
pub fn add_action_line(&mut self, action: &str, line: Line) {
if line.is_key_value_type() {
let idx = self.lines.len();
let map = self.groups.entry(action.to_string()).or_insert(HashMap::new());
map.insert(line.get_key_string(), idx);
}
self.lines.push(line);
}
}
#[derive(Debug)]
pub enum Line {
Empty,
Comment(String),
ExecLine(String),
KeyValue(String,String),
KeyLocaleValue(String,String,String),
DesktopHeader,
ActionHeader(String),
GroupHeader(String)
}
impl Line {
pub fn is_action_header(&self) -> bool {
match *self {
Line::ActionHeader(..) => true,
_ => false,
}
}
fn is_key_value_type(&self) -> bool {
match *self {
Line::KeyValue(..) | Line::KeyLocaleValue(..) => true,
_ => false,
}
}
fn get_key_string(&self) -> String {
match *self {
Line::KeyValue(ref k, ..) => k.to_string(),
Line::KeyLocaleValue(ref k, ref loc, ..) => format!("{}[{}]", k, loc),
_ => panic!("get_key_string() called on Line item which is not a key/value type"),
}
}
fn write_to<W: Write>(&self, mut w: W) -> Result<()> {
match *self {
Line::Empty => writeln!(w)?,
Line::Comment(ref s) => writeln!(w, "#{}", s)?,
Line::ExecLine(ref s) => writeln!(w, "Exec={}", s)?,
Line::KeyValue(ref k, ref v) => writeln!(w, "{}={}", k, v)?,
Line::KeyLocaleValue(ref k, ref loc, ref v) => writeln!(w, "{}[{}]={}", k, loc, v)?,
Line::DesktopHeader => writeln!(w, "[Desktop Entry]")?,
Line::ActionHeader(ref action) => writeln!(w, "[Desktop Action {}]", action)?,
Line::GroupHeader(..) => {},
}
Ok(())
}
}

120
citadel-desktopd/src/desktop_file_sync.rs Normal file
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use std::sync::{Arc,Mutex};
use std::path::Path;
use std::fs;
use failure::ResultExt;
use monitor::{DirectoryMonitor,MonitorEventHandler};
use parser::DesktopFileParser;
use config::Config;
use Result;
pub struct DesktopFileSync {
config: Config,
monitor: DirectoryMonitor,
}
impl DesktopFileSync {
pub fn new(config: Config) -> DesktopFileSync {
let handler = Arc::new(Mutex::new(SyncHandler::new(config.clone())));
let monitor = DirectoryMonitor::new(handler.clone());
DesktopFileSync {
config, monitor
}
}
pub fn clear_target_directory(&self) -> Result<()> {
let entries = fs::read_dir(self.config.target_directory())?;
for entry in entries {
let path = entry?.path();
if is_desktop_file(&path) {
fs::remove_file(&path).context(format!("remove_file({:?})", path))?;
}
}
Ok(())
}
pub fn sync_source(&mut self, src: &Path) -> Result<()> {
self.clear_target_directory()?;
self.sync_source_directory(src)?;
self.monitor.set_monitor_sources(&[src.to_path_buf()]);
Ok(())
}
fn sync_source_directory(&self, src: &Path) -> Result<()> {
let entries = fs::read_dir(src)?;
for entry in entries {
let path = entry?.path();
if is_desktop_file(path.as_path()) {
if let Err(e) = sync_desktop_file(path.as_path(), &self.config) {
info!("error syncing desktop file {:?}: {}", path, e);
}
}
}
Ok(())
}
}
struct SyncHandler {
config: Config,
}
impl SyncHandler {
fn new(config: Config) -> SyncHandler {
SyncHandler { config }
}
}
impl MonitorEventHandler for SyncHandler {
fn file_added(&self, path: &Path) -> Result<()> {
info!("file_added: {:?}", path);
if is_desktop_file(path) {
sync_desktop_file(path, &self.config)?;
}
Ok(())
}
fn file_removed(&self, path: &Path) -> Result<()> {
info!("file_removed: {:?}", path);
let filename = filename_from_path(path)?;
let target_path = self.config.target_directory().join(filename);
if target_path.exists() {
fs::remove_file(target_path.as_path())?;
}
Ok(())
}
}
fn sync_desktop_file(source: &Path, config: &Config) -> Result<()> {
if !is_desktop_file(source) {
return Err(format_err!("source path [{:?}] is not desktop file", source));
}
let df = DesktopFileParser::parse_from_path(source, config.exec_prefix())?;
if df.is_showable() {
df.write_to_dir(config.target_directory())?;
} else {
info!("ignoring {} as not showable", df.filename());
}
Ok(())
}
fn is_desktop_file(path: &Path) -> bool {
if let Some(ext) = path.extension() {
return ext == "desktop"
}
false
}
fn filename_from_path(path: &Path) -> Result<&str> {
let filename = match path.file_name() {
Some(name) => name,
None => return Err(format_err!("Path {:?} has no filename component", path)),
};
match filename.to_str() {
Some(s) => Ok(s),
None => Err(format_err!("Filename has invalid utf8 encoding")),
}
}

57
citadel-desktopd/src/main.rs Normal file
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#[macro_use] extern crate failure;
#[macro_use] extern crate lazy_static;
#[macro_use] extern crate log;
#[macro_use] extern crate serde_derive;
extern crate env_logger;
extern crate serde;
extern crate toml;
extern crate inotify;
extern crate nix;
mod desktop;
mod parser;
mod config;
mod monitor;
mod desktop_file_sync;
use std::result;
use std::process;
use failure::Error;
use desktop_file_sync::DesktopFileSync;
use config::Config;
pub type Result<T> = result::Result<T, Error>;
fn main() {
std::env::set_var("RUST_LOG", "info");
env_logger::init();
let mut args = std::env::args();
args.next();
if args.len() != 1 {
println!("expected config file argument");
process::exit(1);
}
let config_path = args.next().unwrap();
let config = match Config::from_path(&config_path) {
Err(e) => {
warn!("Failed to load configuration file: {}", e);
process::exit(1);
},
Ok(config) => config,
};
let src = config.source_paths().first().unwrap().clone();
let mut dfs = DesktopFileSync::new(config.clone());
if let Err(e) = dfs.sync_source(src.as_path()) {
warn!("error calling sync_source: {}", e);
}
loop {
std::thread::sleep(std::time::Duration::new(120, 0));
}
}

210
citadel-desktopd/src/monitor.rs Normal file
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use std::collections::HashMap;
use std::path::{Path,PathBuf};
use std::sync::{Arc,Mutex,Once,ONCE_INIT};
use std::sync::atomic::{AtomicBool,Ordering};
use std::thread::{self,JoinHandle};
use std::os::unix::thread::JoinHandleExt;
use std::io::ErrorKind;
use nix::libc;
use nix::sys::signal;
use inotify::{Events,Inotify,EventMask,WatchMask,Event,WatchDescriptor};
use Result;
pub trait MonitorEventHandler: Send+Sync {
fn file_added(&self, path: &Path) -> Result<()> { let _ = path; Ok(()) }
fn file_removed(&self, path: &Path) -> Result<()> { let _ = path; Ok(()) }
fn directory_added(&self, path: &Path) -> Result<()> { let _ = path; Ok(()) }
fn directory_removed(&self, path: &Path) -> Result<()> { let _ = path; Ok(()) }
}
pub struct DirectoryMonitor {
event_handler: Arc<Mutex<MonitorEventHandler>>,
worker_handle: Option<WorkerHandle>,
}
impl DirectoryMonitor {
pub fn new(handler: Arc<Mutex<MonitorEventHandler>>) -> DirectoryMonitor {
initialize();
DirectoryMonitor {
event_handler: handler,
worker_handle: None,
}
}
pub fn set_monitor_sources(&mut self, sources: &[PathBuf]) {
if let Some(handle) = self.worker_handle.take() {
handle.stop();
handle.wait();
}
let sources = Vec::from(sources);
let h = MonitorWorker::start_worker(sources, self.event_handler.clone());
self.worker_handle = Some(h);
}
}
struct MonitorWorker {
descriptors: HashMap<WatchDescriptor,PathBuf>,
inotify: Inotify,
exit_flag: Arc<AtomicBool>,
watch_paths: Vec<PathBuf>,
handler: Arc<Mutex<MonitorEventHandler>>,
}
impl MonitorWorker {
fn start_worker(watch_paths: Vec<PathBuf>, handler: Arc<Mutex<MonitorEventHandler>>) -> WorkerHandle {
let exit_flag = Arc::new(AtomicBool::new(false));
let flag_clone = exit_flag.clone();
let jhandle = thread::spawn(move || {
let mut worker = match MonitorWorker::new(watch_paths, flag_clone, handler) {
Ok(worker) => worker,
Err(e) => {
info!("failed to initialize inotify handle: {}", e);
return;
}
};
if let Err(e) = worker.run() {
info!("error returned from worker thread: {}", e);
}
});
WorkerHandle::new(jhandle, exit_flag)
}
fn new(watch_paths: Vec<PathBuf>, exit_flag: Arc<AtomicBool>, handler: Arc<Mutex<MonitorEventHandler>>) -> Result<MonitorWorker> {
Ok(MonitorWorker {
descriptors: HashMap::new(),
inotify: Inotify::init()?,
exit_flag,
watch_paths,
handler,
})
}
fn add_watches(&mut self) -> Result<()> {
let watch_flags = WatchMask::CREATE | WatchMask::DELETE | WatchMask::MOVED_TO |
WatchMask::DONT_FOLLOW | WatchMask::ONLYDIR;
for p in &self.watch_paths {
let wd = self.inotify.add_watch(p, watch_flags)?;
self.descriptors.insert(wd, p.clone());
}
Ok(())
}
fn read_events<'a>(&mut self, buffer: &'a mut [u8]) -> Result<Option<Events<'a>>> {
if self.exit_flag.load(Ordering::Relaxed) {
return Ok(None);
}
match self.inotify.read_events_blocking(buffer) {
Ok(events) => Ok(Some(events)),
Err(e) => {
if e.kind() == ErrorKind::Interrupted {
Ok(None)
} else {
Err(e.into())
}
}
}
}
fn process_events(&self, events: Events) {
for ev in events {
if let Err(e) = self.handle_event(&ev) {
info!("error handling inotify event: {}", e);
}
}
}
fn run(&mut self) -> Result<()> {
info!("running monitor event loop");
self.add_watches()?;
let mut buffer = [0u8; 4096];
loop {
match self.read_events(&mut buffer)? {
Some(events) => self.process_events(events),
None => break,
}
}
Ok(())
}
fn full_event_path(&self, ev: &Event) -> Result<PathBuf> {
let filename = ev.name
.ok_or(format_err!("inotify event received without a filename"))?;
let path = self.descriptors.get(&ev.wd)
.ok_or(format_err!("Failed to find descriptor for received inotify event"))?;
Ok(path.join(filename))
}
fn handle_event(&self, ev: &Event) -> Result<()> {
let handler = self.handler.lock().unwrap();
let pb = self.full_event_path(ev)?;
let path = pb.as_path();
let is_create = ev.mask.intersects(EventMask::CREATE|EventMask::MOVED_TO);
if !is_create && !ev.mask.contains(EventMask::DELETE) {
return Err(format_err!("Unexpected mask value for inotify event: {:?}", ev.mask));
}
if ev.mask.contains(EventMask::ISDIR) {
if is_create {
handler.directory_added(path)?;
} else {
handler.directory_removed(path)?;
}
} else {
if is_create {
handler.file_added(path)?;
} else {
handler.file_removed(path)?;
}
}
Ok(())
}
}
pub struct WorkerHandle {
join_handle: JoinHandle<()>,
exit_flag: Arc<AtomicBool>,
}
impl WorkerHandle {
fn new(join_handle: JoinHandle<()>, exit_flag: Arc<AtomicBool>) -> WorkerHandle {
WorkerHandle { join_handle, exit_flag }
}
pub fn stop(&self) {
info!("calling stop on monitor");
let tid = self.join_handle.as_pthread_t();
self.exit_flag.store(true, Ordering::Relaxed);
unsafe {
libc::pthread_kill(tid, signal::SIGUSR1 as libc::c_int);
}
}
pub fn wait(self) {
if let Err(e) = self.join_handle.join() {
warn!("monitor thread panic with '{:?}'", e);
}
}
}
static INITIALIZE_ONCE: Once = ONCE_INIT;
fn initialize() {
INITIALIZE_ONCE.call_once(|| {
let h = signal::SigHandler::Handler(sighandler);
let sa = signal::SigAction::new(h, signal::SaFlags::empty(), signal::SigSet::empty());
if let Err(e) = unsafe { signal::sigaction(signal::SIGUSR1, &sa) } {
warn!("Error setting signal handler: {}", e);
}
});
}
extern fn sighandler(_: libc::c_int) {
// do nothing, signal is only used to EINTR blocking inotify call
}

307
citadel-desktopd/src/parser.rs Normal file
View File

@ -0,0 +1,307 @@
use std::io::Read;
use std::fs::File;
use std::path::Path;
use std::collections::HashSet;
use desktop::{DesktopFile,Line};
use Result;
lazy_static! {
// These are the keys which are copied into the translated .desktop files
static ref KEY_WHITELIST: HashSet<&'static str> = [
"Type", "Version", "Name", "GenericName", "NoDisplay", "Comment", "Icon", "Hidden",
"OnlyShowIn", "NotShowIn", "Path", "Terminal", "Actions", "MimeType",
"Categories", "Keywords", "StartupNotify", "StartupWMClass", "URL", "DocPath",
"X-GNOME-FullName", "X-GNOME-Provides", "X-Desktop-File-Install-Version", "X-GNOME-UsesNotifications",
"X-GNOME-DocPath", "X-Geoclue-Reason", "X-GNOME-SingleWindow", "X-GNOME-Gettext-Domain",
"X-MultipleArgs",
].iter().cloned().collect();
// These are keys which are recognized but deliberately ignored.
static ref KEY_IGNORELIST: HashSet<&'static str> = [
"DBusActivatable", "Implements", "TryExec", "InitialPreference", "Encoding", "X-KDE-Protocols", "X-GIO-NoFuse", "X-Gnome-Vfs-System",
"X-GNOME-Autostart-Phase", "X-GNOME-Autostart-Notify", "X-GNOME-AutoRestart",
"X-GNOME-Bugzilla-Bugzilla", "X-GNOME-Bugzilla-Product", "X-GNOME-Bugzilla-Component", "X-GNOME-Bugzilla-Version",
"X-GNOME-Bugzilla-ExtraInfoScript", "X-GNOME-Bugzilla-OtherBinaries", "X-GNOME-Autostart-enabled",
"X-AppInstall-Package", "X-KDE-SubstituteUID", "X-Ubuntu-Gettext-Domain", "X-AppInstall-Keywords",
"X-Ayatana-Desktop-Shortcuts", "X-GNOME-Settings-Panel", "X-GNOME-WMSettingsModule", "X-GNOME-WMName",
"X-GnomeWMSettingsLibrary",
].iter().cloned().collect();
}
fn is_whitelisted_key(key: &str) -> bool {
KEY_WHITELIST.contains(key)
}
fn filename_from_path(path: &Path) -> Result<&str> {
let filename = match path.file_name() {
Some(name) => name,
None => return Err(format_err!("Path {:?} has no filename component", path)),
};
match filename.to_str() {
Some(s) => Ok(s),
None => Err(format_err!("Filename has invalid utf8 encoding")),
}
}
pub struct DesktopFileParser {
desktop_file: DesktopFile,
exec_prefix: String,
seen_header: bool,
current_action: Option<String>,
in_ignored_group: bool,
known_actions: HashSet<String>,
}
impl DesktopFileParser {
fn new(filename: &str, exec_prefix: &str) -> DesktopFileParser {
DesktopFileParser {
desktop_file: DesktopFile::new(filename),
exec_prefix: exec_prefix.to_string(),
seen_header: false,
current_action: None,
in_ignored_group: false,
known_actions: HashSet::new(),
}
}
pub fn parse_from_path<P: AsRef<Path>>(path: P, exec_prefix: &str) -> Result<DesktopFile> {
let filename = filename_from_path(path.as_ref())?;
let f = File::open(path.as_ref())?;
DesktopFileParser::parse_from_reader(f, filename, exec_prefix)
}
fn parse_from_reader<T: Read>(mut r: T, filename: &str, exec_prefix: &str) -> Result<DesktopFile> {
let mut buffer = String::new();
r.read_to_string(&mut buffer)?;
DesktopFileParser::parse_from_string(&buffer, filename, exec_prefix)
}
fn parse_from_string(body: &str, filename: &str, exec_prefix: &str) -> Result<DesktopFile> {
let mut parser = DesktopFileParser::new(filename, exec_prefix);
for s in body.lines() {
match LineParser::parse(s) {
Some(line) => parser.process_line(line)?,
None => return Err(format_err!("Failed to parse line: '{}'", s))
}
}
Ok(parser.desktop_file)
}
fn process_initial(&mut self, line: Line) -> Result<()> {
match line {
Line::Comment(_) | Line::Empty => {},
Line::DesktopHeader => self.seen_header = true,
_ => return Err(format_err!("Missing Desktop Entry header"))
}
self.desktop_file.add_line(line);
Ok(())
}
fn process_line(&mut self, mut line: Line) -> Result<()> {
if self.in_ignored_group && !line.is_action_header() {
return Ok(())
}
if !self.seen_header {
return self.process_initial(line)
}
if let Line::KeyValue(ref k, ref value) = line {
if k == "Actions" {
for s in value.split_terminator(";") {
self.known_actions.insert(s.trim().to_string());
}
}
}
match line {
Line::ExecLine(ref mut s) => {
s.insert_str(0,self.exec_prefix.as_str())
},
Line::DesktopHeader => return Err(format_err!("Duplicate Desktop Entry header")),
Line::ActionHeader(ref action) => {
if self.known_actions.contains(action) {
self.current_action = Some(action.to_string());
self.in_ignored_group = false;
} else {
return Err(format_err!("Desktop Action header with undecleared action: {}", action))
}
},
Line::GroupHeader(_) => {
self.in_ignored_group = true;
return Ok(())
},
Line::KeyLocaleValue(ref k,_,_) | Line::KeyValue(ref k,_) => {
if !is_whitelisted_key(k) {
if !KEY_IGNORELIST.contains(k.as_str()) {
info!("Unknown key in {}: {}", self.desktop_file.filename(), k);
}
return Ok(())
}
}
_ => {},
}
if let Some(ref action) = self.current_action {
self.desktop_file.add_action_line(action, line)
} else {
self.desktop_file.add_line(line);
}
Ok(())
}
}
const DESKTOP_ACTION: &'static str = "Desktop Action ";
struct LineParser<'a> {
s: &'a str,
}
impl <'a> LineParser<'a> {
fn new(s: &'a str) -> LineParser<'a> {
LineParser {
s,
}
}
fn parse(s: &'a str) -> Option<Line> {
if let Some(line) = LineParser::new(s)._parse() {
if validate_line(&line) {
return Some(line)
}
}
None
}
fn first(&self) -> Option<char> {
self.s.chars().next()
}
fn last(&self) -> Option<char> {
self.s.chars().next_back()
}
fn _parse(&mut self) -> Option<Line> {
match self.first() {
None => Some(Line::Empty),
Some('#') => Some(Line::Comment(self.s[1..].to_string())),
Some('[') => self.parse_header(),
Some(_) => self.parse_keyval(),
}
}
fn parse_header(&mut self) -> Option<Line> {
if self.last().unwrap() != ']' {
return None
}
let content = &self.s[1..self.s.len() - 1];
if content.starts_with(DESKTOP_ACTION) {
let action = &content[DESKTOP_ACTION.len()..];
return Some(Line::ActionHeader(action.to_string()))
} else if content == "Desktop Entry" {
return Some(Line::DesktopHeader)
}
return Some(Line::GroupHeader(content.to_string()))
}
fn parse_keyval(&self) -> Option<Line> {
let parts: Vec<&str> = self.s.splitn(2, "=").collect();
if parts.len() != 2 {
return None
}
let key = parts[0].trim();
let val = parts[1].trim();
if !key.contains("[") {
if key == "Exec" {
return Some(Line::ExecLine(val.to_string()))
}
return Some(Line::KeyValue(key.to_string(), val.to_string()))
}
self.parse_locale(key).map(|(key,locale)| Line::KeyLocaleValue(key, locale, val.to_string()))
}
fn parse_locale(&self, key: &str) -> Option<(String,String)> {
let idx = key.find("[").unwrap();
let (k,loc) = key.split_at(idx);
let mut chars = loc.chars();
if let Some(']') = chars.next_back() {
chars.next();
if k.trim() == "Exec" {
// Exec key with locale not allowed
return None;
}
return Some((k.trim().to_string(), chars.as_str().to_string()))
}
None
}
}
fn is_alphanum_or_dash(c: char) -> bool {
is_ascii(c) && (c.is_alphanumeric() || c == '-')
}
fn is_ascii(c: char) -> bool {
c as u32 <= 0x7F
}
fn is_first_char_alphabetic(s: &str) -> bool {
if let Some(c) = s.chars().next() {
return is_ascii(c) && c.is_alphabetic()
}
false
}
fn is_valid_key(key: &str) -> bool {
if !is_first_char_alphabetic(key) {
return false
}
key.chars().all(is_alphanum_or_dash)
}
fn is_valid_locale(locale: &str) -> bool {
!locale.is_empty() && locale.chars().all(|c| {
is_alphanum_or_dash(c) || c == '_' || c == '.' || c == '@'
})
}
fn is_valid_value(value: &str) -> bool {
value.chars().all(|c| {
!(c.is_control() || c as u32 == 0 )
})
}
fn is_valid_action(action: &str) -> bool {
is_first_char_alphabetic(action) && action.chars().all(is_alphanum_or_dash)
}
fn is_valid_group(group: &str) -> bool {
is_first_char_alphabetic(group) && group.chars().all(|c| {
is_ascii(c) && !c.is_control()
})
}
fn is_valid_exec(val: &str) -> bool {
val.chars().all(|c| {
is_ascii(c) && !(c.is_control() || c as u32 == 0)
})
}
pub fn validate_line(line: &Line) -> bool {
match *line {
Line::ExecLine(ref s) => is_valid_exec(s),
Line::KeyValue(ref k, ref v) => is_valid_key(k) && is_valid_value(v),
Line::KeyLocaleValue(ref k, ref l, ref v) => is_valid_key(k) && is_valid_locale(l) && is_valid_value(v),
Line::ActionHeader(ref action) => is_valid_action(action),
Line::GroupHeader(ref group) => is_valid_group(group),
_ => true,
}
}
#[test]
fn test_parser() {
let tests = vec!["###", "", "# hello", "[Desktop Entry]", "[Desktop Action foo]", "Foo=Bar", "Foo[hehe]=Lol"];
for t in tests {
println!("{:?}", LineParser::parse(t));
}
}

305
citadel-mkimage/Cargo.lock generated
View File

@ -6,6 +6,11 @@ dependencies = [
"winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)", "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
] ]
[[package]]
name = "arrayref"
version = "0.3.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]] [[package]]
name = "atty" name = "atty"
version = "0.2.11" version = "0.2.11"
@ -42,6 +47,25 @@ name = "bitflags"
version = "1.0.4" version = "1.0.4"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "block-buffer"
version = "0.3.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"arrayref 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
"byte-tools 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "byte-tools"
version = "0.2.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "byteorder"
version = "1.2.7"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]] [[package]]
name = "cc" name = "cc"
version = "1.0.25" version = "1.0.25"
@ -58,6 +82,7 @@ version = "0.1.0"
dependencies = [ dependencies = [
"clap 2.32.0 (registry+https://github.com/rust-lang/crates.io-index)", "clap 2.32.0 (registry+https://github.com/rust-lang/crates.io-index)",
"failure 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)", "failure 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
"libcitadel 0.1.0",
"serde 1.0.82 (registry+https://github.com/rust-lang/crates.io-index)", "serde 1.0.82 (registry+https://github.com/rust-lang/crates.io-index)",
"serde_derive 1.0.82 (registry+https://github.com/rust-lang/crates.io-index)", "serde_derive 1.0.82 (registry+https://github.com/rust-lang/crates.io-index)",
"toml 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)", "toml 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
@ -77,6 +102,56 @@ dependencies = [
"vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)", "vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
] ]
[[package]]
name = "clear_on_drop"
version = "0.2.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"cc 1.0.25 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "cloudabi"
version = "0.0.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "curve25519-dalek"
version = "0.20.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"byteorder 1.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
"clear_on_drop 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
"digest 0.7.6 (registry+https://github.com/rust-lang/crates.io-index)",
"generic-array 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
"rand 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)",
"subtle 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "digest"
version = "0.7.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"generic-array 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "ed25519-dalek"
version = "0.8.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"clear_on_drop 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
"curve25519-dalek 0.20.0 (registry+https://github.com/rust-lang/crates.io-index)",
"digest 0.7.6 (registry+https://github.com/rust-lang/crates.io-index)",
"failure 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
"generic-array 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
"rand 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]] [[package]]
name = "failure" name = "failure"
version = "0.1.3" version = "0.1.3"
@ -97,11 +172,72 @@ dependencies = [
"synstructure 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)", "synstructure 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
] ]
[[package]]
name = "fake-simd"
version = "0.1.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "fuchsia-zircon"
version = "0.3.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
"fuchsia-zircon-sys 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "fuchsia-zircon-sys"
version = "0.3.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "generic-array"
version = "0.9.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"typenum 1.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "lazy_static"
version = "1.2.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]] [[package]]
name = "libc" name = "libc"
version = "0.2.45" version = "0.2.45"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "libcitadel"
version = "0.1.0"
dependencies = [
"ed25519-dalek 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
"failure 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
"lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
"libc 0.2.45 (registry+https://github.com/rust-lang/crates.io-index)",
"nix 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
"rand 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
"rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
"serde 1.0.82 (registry+https://github.com/rust-lang/crates.io-index)",
"serde_derive 1.0.82 (registry+https://github.com/rust-lang/crates.io-index)",
"sha2 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
"toml 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "nix"
version = "0.12.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
"cc 1.0.25 (registry+https://github.com/rust-lang/crates.io-index)",
"cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
"libc 0.2.45 (registry+https://github.com/rust-lang/crates.io-index)",
"void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]] [[package]]
name = "proc-macro2" name = "proc-macro2"
version = "0.4.24" version = "0.4.24"
@ -118,6 +254,91 @@ dependencies = [
"proc-macro2 0.4.24 (registry+https://github.com/rust-lang/crates.io-index)", "proc-macro2 0.4.24 (registry+https://github.com/rust-lang/crates.io-index)",
] ]
[[package]]
name = "rand"
version = "0.5.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
"fuchsia-zircon 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
"libc 0.2.45 (registry+https://github.com/rust-lang/crates.io-index)",
"rand_core 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
"winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "rand"
version = "0.6.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
"fuchsia-zircon 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
"libc 0.2.45 (registry+https://github.com/rust-lang/crates.io-index)",
"rand_chacha 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
"rand_core 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
"rand_hc 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
"rand_isaac 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
"rand_pcg 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
"rand_xorshift 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
"rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
"winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "rand_chacha"
version = "0.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"rand_core 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
"rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "rand_core"
version = "0.2.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"rand_core 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "rand_core"
version = "0.3.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "rand_hc"
version = "0.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"rand_core 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "rand_isaac"
version = "0.1.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"rand_core 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "rand_pcg"
version = "0.1.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"rand_core 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
"rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "rand_xorshift"
version = "0.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"rand_core 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]] [[package]]
name = "redox_syscall" name = "redox_syscall"
version = "0.1.43" version = "0.1.43"
@ -136,6 +357,32 @@ name = "rustc-demangle"
version = "0.1.9" version = "0.1.9"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "rustc-serialize"
version = "0.3.24"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "rustc_version"
version = "0.2.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
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1
citadel-mkimage/Cargo.toml
View File

@ -5,6 +5,7 @@ authors = ["Bruce Leidl <bruce@subgraph.com>"]
homepage = "https://github.com/subgraph/citadel" homepage = "https://github.com/subgraph/citadel"
[dependencies] [dependencies]
libcitadel = { path = "../libcitadel" }
clap = "2.32.0" clap = "2.32.0"
failure = "0.1.3" failure = "0.1.3"
serde_derive = "1.0.82" serde_derive = "1.0.82"

2
citadel-mkimage/src/build.rs
View File

@ -5,8 +5,8 @@ use std::fs::{self,File};
use std::io::{self,Write}; use std::io::{self,Write};
use failure::ResultExt; use failure::ResultExt;
use libcitadel::Result;
use Result;
use BuildConfig; use BuildConfig;
use util; use util;

4
citadel-mkimage/src/config.rs
View File

@ -3,9 +3,11 @@ use std::path::{Path,PathBuf};
use std::fs::File; use std::fs::File;
use std::io::Read; use std::io::Read;
use Result;
use toml; use toml;
use libcitadel::Result;
#[derive(Deserialize)] #[derive(Deserialize)]
pub struct BuildConfig { pub struct BuildConfig {
#[serde (rename="image-type")] #[serde (rename="image-type")]

117
citadel-mkimage/src/main.rs
View File

@ -1,53 +1,19 @@
#[macro_use] extern crate libcitadel;
#[macro_use] extern crate failure; #[macro_use] extern crate failure;
#[macro_use] extern crate serde_derive; #[macro_use] extern crate serde_derive;
#[macro_export]
macro_rules! info {
($e:expr) => { if $crate::verbose() { println!("[+] {}", $e);} };
($fmt:expr, $($arg:tt)+) => { if $crate::verbose() { println!("[+] {}", format!($fmt, $($arg)+));} };
}
#[macro_export]
macro_rules! warn {
($e:expr) => { println!("WARNING: {}", $e); };
($fmt:expr, $($arg:tt)+) => { println!("WARNING: {}", format!($fmt, $($arg)+)); };
}
#[macro_export]
macro_rules! notify {
($e:expr) => { println!("[+] {}", $e); };
($fmt:expr, $($arg:tt)+) => { println!("[+] {}", format!($fmt, $($arg)+)); };
}
thread_local! {
pub static VERBOSE: RefCell<bool> = RefCell::new(false);
}
pub fn verbose() -> bool {
VERBOSE.with(|f| {
*f.borrow()
})
}
pub fn set_verbose(val: bool) {
VERBOSE.with(|f| {
*f.borrow_mut() = val
});
}
extern crate clap; extern crate clap;
extern crate toml; extern crate toml;
use std::process::exit; use std::process::exit;
use std::result;
use std::cell::RefCell;
use clap::{App,Arg,SubCommand,ArgMatches}; use clap::{App,Arg,SubCommand,ArgMatches};
use clap::AppSettings::*; use clap::AppSettings::*;
use failure::Error; use failure::Error;
pub type Result<T> = result::Result<T,Error>;
use build::UpdateBuilder; use build::UpdateBuilder;
use config::BuildConfig; use config::BuildConfig;
use libcitadel::{Result,set_verbose};
mod build; mod build;
mod config; mod config;
@ -91,40 +57,6 @@ fn format_error(err: &Error) -> String {
output output
} }
/*
fn find_source_image(update_type: &str, filename: &str) -> Result<PathBuf> {
let mut path = PathBuf::from(filename);
let meta = path.metadata()
.context(format!("could not find source file or directory {}", filename))?;
if meta.file_type().is_file() {
return Ok(path);
}
if !meta.file_type().is_dir() {
bail!("source not found: {}", filename);
}
path.push(format!("build/images/citadel-{}-image-intel-corei7-64.ext2", update_type));
let meta = path.metadata()
.context(format!("could not find source file {}", path.display()))?;
if !meta.file_type().is_file() {
bail!("source {} exists but is not a file", path.display());
}
let canonical = fs::canonicalize(&path)
.context(format!("failed to resolve {} to absolute path", path.display()))?;
Ok(canonical)
}
fn parse_version(arg_matches: &ArgMatches) -> Result<usize> {
let v = arg_matches.value_of("version")
.unwrap_or("0")
.parse::<usize>()
.context("Unable to parse version argument")?;
Ok(v)
}
*/
fn build_image(arg_matches: &ArgMatches) -> Result<()> { fn build_image(arg_matches: &ArgMatches) -> Result<()> {
let build_file = arg_matches.value_of("build-file").unwrap(); let build_file = arg_matches.value_of("build-file").unwrap();
@ -135,48 +67,3 @@ fn build_image(arg_matches: &ArgMatches) -> Result<()> {
} }
/*
fn build_update(update_type: &str, arg_matches: &ArgMatches) -> Result<()> {
let config = Config::load("/usr/share/citadel/citadel-image.conf")?;
let channel = config.get_default_channel().unwrap(); // XXX unwrap()
let source_name = arg_matches.value_of("citadel-base").unwrap();
let source = find_source_image(update_type, source_name)?;
let version = parse_version(arg_matches)?;
info!("Building file {} as {} update image for channel {} with version {}", source.display(), update_type, channel.name(), version);
let conf = BuildConfig::load("").unwrap();
let mut builder = UpdateBuilder::new(conf)?;
builder.build()?;
Ok(())
}
fn rootfs_update(arg_matches: &ArgMatches) -> Result<()> {
build_update("rootfs", arg_matches)
}
fn modules_update(arg_matches: &ArgMatches) -> Result<()> {
build_update("modules", arg_matches)
}
fn extra_update(arg_matches: &ArgMatches) -> Result<()> {
build_update("extra", arg_matches)
}
fn generate_verity(_arg_matches: &ArgMatches) -> Result<()> {
Ok(())
}
fn generate_keys() -> Result<()> {
let keys = SigningKeys::generate()?;
println!("pubkey = \"{}\"", keys.to_public_hex());
println!("keypair = \"{}\"", keys.to_hex());
Ok(())
}
fn image_info(arg_matches: &ArgMatches) -> Result<()> {
let image = arg_matches.value_of("image-file").unwrap();
let config = Config::load("/usr/share/citadel/citadel-image.conf")?;
info::show_info(image, &config)
}
*/

4
citadel-mkimage/src/util.rs
View File

@ -1,11 +1,9 @@
use std::process::{Command,Stdio}; use std::process::{Command,Stdio};
use std::path::Path; use std::path::Path;
use std::collections::HashMap; use std::collections::HashMap;
use failure::ResultExt; use failure::ResultExt;
use libcitadel::Result;
use Result;
pub fn sha256<P: AsRef<Path>>(path: P) -> Result<String> { pub fn sha256<P: AsRef<Path>>(path: P) -> Result<String> {

484
citadel-mount/Cargo.lock generated Normal file
View File

@ -0,0 +1,484 @@
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10
citadel-mount/Cargo.toml Normal file
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@ -0,0 +1,10 @@
[package]
name = "citadel-mount"
version = "0.1.0"
authors = ["Bruce Leidl <bruce@subgraph.com>"]
homepage = "http://github.com/subgraph/citadel"
[dependencies]
libcitadel = { path = "../libcitadel" }
libc = "0.2"
failure = "0.1.3"

142
citadel-mount/src/boot_select.rs Normal file
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use libcitadel::{Config,Partition,Result,ImageHeader};
pub struct BootSelection {
partitions: Vec<Partition>,
}
impl BootSelection {
pub fn choose_install_partition(config: &Config) -> Result<Partition> {
let bs = BootSelection::load_partitions(config)?;
match bs._choose_install_partition() {
Some(p) => Ok(p.clone()),
None => bail!("no partition found for installation"),
}
}
pub fn choose_boot_partition(config: &Config) -> Result<Partition> {
let bs = BootSelection::load_partitions(config)?;
match bs._choose_boot_partition() {
Some(p) => Ok(p.clone()),
None => bail!("no partition found to boot from"),
}
}
fn load_partitions(config: &Config) -> Result<BootSelection> {
let partitions = Partition::rootfs_partitions(config)
.map_err(|e| format_err!("Could not load rootfs partition info: {}", e))?;
Ok(BootSelection {
partitions
})
}
fn _choose_install_partition(&self) -> Option<&Partition> {
self.choose(|p| {
// first pass, if there is a partition which is not mounted and
// not initialized use that one
!p.is_mounted() && !p.is_initialized()
}).or_else(|| self.choose(|p| {
// second pass, just find one that's not mounted
!p.is_mounted()
}))
}
fn choose<F>(&self, pred: F) -> Option<&Partition>
where F: Sized + Fn(&&Partition) -> bool
{
self.partitions.iter().find(pred)
}
/// Find the best rootfs partition to boot from
fn _choose_boot_partition(&self) -> Option<&Partition> {
let mut best: Option<&Partition> = None;
for p in &self.partitions {
if is_better(&best, p) {
best = Some(p);
}
}
best
}
/// Perform checks for error states at boot time.
pub fn scan_boot_partitions(&mut self, config: &Config) -> Result<()> {
for mut p in &mut self.partitions {
if let Err(e) = boot_scan_partition(&mut p, config) {
warn!("error in bootscan of partition {}: {}", p.path().display(), e);
}
}
Ok(())
}
}
/// Called at boot to perform various checks and possibly
/// update the status field to an error state.
///
/// Mark `STATUS_TRY_BOOT` partition as `STATUS_FAILED`.
///
/// If metainfo cannot be parsed, mark as `STATUS_BAD_META`.
///
/// Verify metainfo signature and mark `STATUS_BAD_SIG` if
/// signature verification fails.
///
fn boot_scan_partition(p: &mut Partition, config: &Config) -> Result<()> {
if !p.is_initialized() {
return Ok(())
}
if p.header().status() == ImageHeader::STATUS_TRY_BOOT {
warn!("Partition {} has STATUS_TRY_BOOT, assuming it failed boot attempt and marking STATUS_FAILED", p.path().display());
p.write_status(ImageHeader::STATUS_FAILED)?;
}
let signature = p.header().signature();
p.metainfo().verify(config, &signature)?;
Ok(())
}
fn is_better<'a>(current_best: &Option<&'a Partition>, other: &'a Partition) -> bool {
if !other.is_initialized() {
return false;
}
// Only consider partitions in state NEW or state GOOD
if !other.is_good() && !other.is_new() {
return false;
}
// If metainfo is broken, then no, it's not better
//if !other.metainfo().is_ok() {
// return false;
//}
let best = match *current_best {
Some(p) => p,
// No current 'best', so 'other' is better, whatever it is.
None => return true,
};
// First parition with PREFER flag trumps everything else
if best.is_preferred() {
return false;
}
let best_version = best.metainfo().version();
let other_version = other.metainfo().version();
if best_version > other_version {
return false;
}
if other_version > best_version {
return true;
}
// choose NEW over GOOD if versions are the same
if other.is_new() && best.is_good() {
return true;
}
// ... but if all things otherwise match, return first match
false
}

82
citadel-mount/src/main.rs Normal file
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@ -0,0 +1,82 @@
#[macro_use] extern crate failure;
#[macro_use] extern crate libcitadel;
extern crate libc;
use std::env;
use std::process::exit;
use libcitadel::{Result,Config,CommandLine,set_verbose,ResourceImage};
mod boot_select;
mod rootfs;
mod uname;
pub use boot_select::BootSelection;
use rootfs::Rootfs;
/// mount command supports 3 subcommands
///
/// citadel-mount rootfs
/// citadel-mount modules
/// citadel-mount extra
///
/// 'rootfs' creates the /dev/mapper/rootfs device which will be mounted as root filesystem
///
/// 'modules' mounts a resource bundle containing kernel modules
/// 'extra' mounts a resource bundle
///
///
fn main() {
if CommandLine::verbose() {
set_verbose(true);
}
let config = match Config::load_default() {
Ok(config) => config,
Err(err) => {
warn!("{}", err);
exit(1);
},
};
let mut args = env::args();
args.next();
let result = match args.next() {
Some(ref s) if s == "rootfs" => mount_rootfs(config),
Some(ref s) if s == "modules" => mount_modules(config),
Some(ref s) if s == "extra" => mount_extra(config),
_ => Err(format_err!("Bad or missing argument")),
};
if let Err(e) = result {
warn!("Failed: {}", e);
exit(1);
}
}
fn mount_rootfs(config: Config) -> Result<()> {
info!("citadel-mount rootfs");
let rootfs = Rootfs::new(config);
rootfs.setup()
}
fn mount_modules(config: Config) -> Result<()> {
info!("citadel-mount modules");
let utsname = uname::uname();
let v = utsname.release().split("-").collect::<Vec<_>>();
let name = format!("citadel-modules-{}", v[0]);
let mut image = ResourceImage::find(&name)?;
image.mount(&config)?;
Ok(())
}
fn mount_extra(config: Config) -> Result<()> {
info!("citadel-mount extra");
let mut image = ResourceImage::find("citadel-extra")?;
image.mount(&config)?;
Ok(())
}

110
citadel-mount/src/rootfs.rs Normal file
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use std::process::Command;
use libcitadel::{BlockDev,Result,Partition,CommandLine,Config,ImageHeader,MetaInfo,PathExt};
use BootSelection;
use ResourceImage;
use std::path::Path;
use std::process::Stdio;
pub struct Rootfs {
config: Config,
}
impl Rootfs {
pub fn new(config: Config) -> Rootfs {
Rootfs { config }
}
pub fn setup(&self) -> Result<()> {
if let Ok(partition) = BootSelection::choose_boot_partition(&self.config) {
match self.setup_partition(partition) {
Ok(()) => return Ok(()),
Err(err) => {
warn!("Failed to set up selected boot partition: {}", err);
// fall through
}
}
}
self.setup_rootfs_resource()
}
fn allow_resource(&self) -> bool {
CommandLine::install_mode() || CommandLine::recovery_mode()
}
fn setup_partition(&self, partition: Partition) -> Result<()> {
if CommandLine::noverity() {
self.setup_partition_unverified(&partition)
} else {
self.setup_partition_verified(&partition)
}
}
fn setup_rootfs_resource(&self) -> Result<()> {
if !self.allow_resource() {
info!("Will not search for rootfs resource image because command line flags do not permit it");
return Ok(())
}
info!("Searching for rootfs resource image");
let img = ResourceImage::find_rootfs()?;
let hdr = ImageHeader::from_file(img.path())?;
let metainfo = hdr.verified_metainfo(&self.config)?;
if CommandLine::noverity() {
self.setup_resource_unverified(&img, &metainfo)
} else {
self.setup_resource_verified(&img, &hdr, &metainfo)
}
}
fn setup_resource_unverified(&self, img: &ResourceImage, metainfo: &MetaInfo) -> Result<()> {
let loop_dev = img.path().setup_loop(
Some(ImageHeader::HEADER_SIZE),
Some(metainfo.nblocks() * 4096))?;
self.setup_linear_mapping(&loop_dev)
}
fn setup_resource_verified(&self, img: &ResourceImage, hdr: &ImageHeader, metainfo: &MetaInfo) -> Result<()> {
if !hdr.has_flag(ImageHeader::FLAG_HASH_TREE) {
img.generate_verity_hashtree(&hdr, &metainfo)?;
}
img.path().verity_setup(ImageHeader::HEADER_SIZE, metainfo.nblocks(), metainfo.verity_root(), "rootfs")
}
fn setup_partition_unverified(&self, partition: &Partition) -> Result<()> {
info!("Creating /dev/mapper/rootfs device with linear device mapping of partition (no verity)");
self.setup_linear_mapping(partition.path())
}
fn setup_partition_verified(&self, partition: &Partition) -> Result<()> {
info!("Creating /dev/mapper/rootfs dm-verity device");
let nblocks = partition.metainfo().nblocks();
let roothash = partition.metainfo().verity_root();
partition.path().verity_setup(nblocks * 4096, nblocks, roothash, "rootfs")
}
fn setup_linear_mapping(&self, blockdev: &Path) -> Result<()> {
let dev = BlockDev::open_ro(blockdev)?;
let table = format!("0 {} linear {} 0",
dev.nsectors()?,
blockdev.pathstr());
info!("/usr/sbin/dmsetup create rootfs --table '{}'", table);
let ok = Command::new("/usr/sbin/dmsetup")
.args(&["create", "rootfs", "--table", &table])
.stderr(Stdio::inherit())
.status()
.expect("unable to execute /usr/sbin/dmsetup")
.success();
if !ok {
bail!("Failed to set up linear identity mapping with /usr/sbin/dmsetup");
}
Ok(())
}
}

48
citadel-mount/src/uname.rs Normal file
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@ -0,0 +1,48 @@
use std::mem;
use libc::{self, c_char};
use std::ffi::CStr;
use std::str::from_utf8_unchecked;
#[repr(C)]
#[derive(Clone, Copy)]
pub struct UtsName(libc::utsname);
#[allow(dead_code)]
impl UtsName {
pub fn sysname(&self) -> &str {
to_str(&(&self.0.sysname as *const c_char ) as *const *const c_char)
}
pub fn nodename(&self) -> &str {
to_str(&(&self.0.nodename as *const c_char ) as *const *const c_char)
}
pub fn release(&self) -> &str {
to_str(&(&self.0.release as *const c_char ) as *const *const c_char)
}
pub fn version(&self) -> &str {
to_str(&(&self.0.version as *const c_char ) as *const *const c_char)
}
pub fn machine(&self) -> &str {
to_str(&(&self.0.machine as *const c_char ) as *const *const c_char)
}
}
pub fn uname() -> UtsName {
unsafe {
let mut ret: UtsName = mem::uninitialized();
libc::uname(&mut ret.0);
ret
}
}
#[inline]
fn to_str<'a>(s: *const *const c_char) -> &'a str {
unsafe {
let res = CStr::from_ptr(*s).to_bytes();
from_utf8_unchecked(res)
}
}

350
citadel-realms/Cargo.lock generated Normal file
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@ -0,0 +1,350 @@
[[package]]
name = "ansi_term"
version = "0.11.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"winapi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "atty"
version = "0.2.8"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"libc 0.2.39 (registry+https://github.com/rust-lang/crates.io-index)",
"termion 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
"winapi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "backtrace"
version = "0.3.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
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"winapi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "backtrace-sys"
version = "0.1.16"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
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"libc 0.2.39 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "bitflags"
version = "1.0.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "cc"
version = "1.0.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "cfg-if"
version = "0.1.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "citadel-realms"
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15
citadel-realms/Cargo.toml Normal file
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@ -0,0 +1,15 @@
[package]
name = "citadel-realms"
version = "0.1.0"
authors = ["Bruce Leidl <bruce@subgraph.com>"]
homepage = "http://github.com/subgraph/citadel"
[dependencies]
libc = "0.2"
clap = "2.30.0"
failure = "0.1.1"
toml = "0.4.5"
serde_derive = "1.0.27"
serde = "1.0.27"
termcolor = "0.3"
walkdir = "2"

43
citadel-realms/src/appimg.rs Normal file
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@ -0,0 +1,43 @@
use std::path::Path;
use std::process::Command;
use Realm;
use Result;
const BASE_APPIMG_PATH: &str = "/storage/appimg/base.appimg";
const BTRFS_COMMAND: &str = "/usr/bin/btrfs";
pub fn clone_base_appimg(target_realm: &Realm) -> Result<()> {
if !Path::new(BASE_APPIMG_PATH).exists() {
bail!("base appimg does not exist at {}", BASE_APPIMG_PATH);
}
let target = format!("/realms/realm-{}/rootfs", target_realm.name());
let target_path = Path::new(&target);
if target_path.exists() {
bail!("cannot create clone of base appimg for realm '{}' because rootfs directory already exists at {}",
target_realm.name(), target);
}
if !target_path.parent().unwrap().exists() {
bail!("cannot create clone of base appimg for realm '{}' because realm directory /realms/realm-{} does not exist.",
target_realm.name(), target_realm.name());
}
Command::new(BTRFS_COMMAND)
.args(&["subvolume", "snapshot", BASE_APPIMG_PATH, &target ])
.status()
.map_err(|e| format_err!("failed to execute {}: {}", BTRFS_COMMAND, e))?;
Ok(())
}
pub fn delete_rootfs_subvolume(realm: &Realm) -> Result<()> {
let path = realm.base_path().join("rootfs");
Command::new(BTRFS_COMMAND)
.args(&["subvolume", "delete", path.to_str().unwrap() ])
.status()
.map_err(|e| format_err!("failed to execute {}: {}", BTRFS_COMMAND, e))?;
Ok(())
}

112
citadel-realms/src/config.rs Normal file
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@ -0,0 +1,112 @@
use std::path::Path;
use std::fs::File;
use std::io::Read;
use toml;
use Result;
fn default_true() -> bool {
true
}
fn default_zone() -> String {
"clear".to_owned()
}
#[derive (Deserialize,Clone)]
pub struct RealmConfig {
#[serde(default = "default_true", rename="use-shared-dir")]
use_shared_dir: bool,
#[serde(default, rename="use-ephemeral-home")]
use_ephemeral_home: bool,
#[serde(default = "default_true", rename="use-sound")]
use_sound: bool,
#[serde(default = "default_true", rename="use-x11")]
use_x11: bool,
#[serde(default = "default_true", rename="use-wayland")]
use_wayland: bool,
#[serde(default, rename="use-kvm")]
use_kvm: bool,
#[serde(default,rename="use-gpu")]
use_gpu: bool,
#[serde(default = "default_true", rename="use-network")]
use_network: bool,
#[serde(default = "default_zone", rename="network-zone")]
network_zone: String,
}
impl RealmConfig {
pub fn load_or_default(path: &Path) -> Result<RealmConfig> {
if path.exists() {
let s = load_as_string(&path)?;
let config = toml::from_str::<RealmConfig>(&s)?;
Ok(config)
} else {
Ok(RealmConfig::default())
}
}
pub fn default() -> RealmConfig {
RealmConfig {
use_shared_dir: true,
use_ephemeral_home: false,
use_sound: true,
use_x11: true,
use_wayland: true,
use_kvm: false,
use_gpu: false,
use_network: true,
network_zone: default_zone(),
}
}
pub fn kvm(&self) -> bool {
self.use_kvm
}
pub fn gpu(&self) -> bool {
self.use_gpu
}
pub fn shared_dir(&self) -> bool {
self.use_shared_dir
}
pub fn emphemeral_home(&self) -> bool {
self.use_ephemeral_home
}
pub fn sound(&self) -> bool {
self.use_sound
}
pub fn x11(&self) -> bool {
self.use_x11
}
pub fn wayland(&self) -> bool {
self.use_wayland
}
pub fn network(&self) -> bool {
self.use_network
}
pub fn network_zone(&self) -> &str {
&self.network_zone
}
}
fn load_as_string(path: &Path) -> Result<String> {
let mut f = File::open(path)?;
let mut buffer = String::new();
f.read_to_string(&mut buffer)?;
Ok(buffer)
}

307
citadel-realms/src/main.rs Normal file
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@ -0,0 +1,307 @@
#[macro_use] extern crate failure;
#[macro_use] extern crate serde_derive;
extern crate libc;
extern crate clap;
extern crate toml;
extern crate termcolor;
extern crate walkdir;
use failure::Error;
use clap::{App,Arg,ArgMatches,SubCommand};
use clap::AppSettings::*;
use std::process::exit;
use std::cell::RefCell;
use std::result;
pub type Result<T> = result::Result<T,Error>;
thread_local! {
pub static VERBOSE: RefCell<bool> = RefCell::new(true);
}
pub fn verbose() -> bool {
VERBOSE.with(|f| *f.borrow())
}
macro_rules! warn {
($e:expr) => { println!("[!]: {}", $e); };
($fmt:expr, $($arg:tt)+) => { println!("[!]: {}", format!($fmt, $($arg)+)); };
}
macro_rules! info {
($e:expr) => { if ::verbose() { println!("[+]: {}", $e); } };
($fmt:expr, $($arg:tt)+) => { if ::verbose() { println!("[+]: {}", format!($fmt, $($arg)+)); } };
}
mod manager;
mod realm;
mod util;
mod systemd;
mod config;
mod network;
mod appimg;
use realm::{Realm,RealmSymlinks};
use manager::RealmManager;
use config::RealmConfig;
use systemd::Systemd;
use network::NetworkConfig;
fn main() {
let app = App::new("citadel-realms")
.about("Subgraph Citadel realm management")
.after_help("'realms help <command>' to display help for an individual subcommand\n")
.global_settings(&[ColoredHelp, DisableVersion, DeriveDisplayOrder, VersionlessSubcommands ])
.arg(Arg::with_name("help").long("help").hidden(true))
.arg(Arg::with_name("quiet")
.long("quiet")
.help("Don't display extra output"))
.subcommand(SubCommand::with_name("list")
.arg(Arg::with_name("help").long("help").hidden(true))
.about("Display list of all realms"))
.subcommand(SubCommand::with_name("shell")
.arg(Arg::with_name("help").long("help").hidden(true))
.about("Open shell in current or named realm")
.arg(Arg::with_name("realm-name")
.help("Name of a realm to open shell in. Use current realm if omitted."))
.arg(Arg::with_name("root-shell")
.long("root")
.help("Open shell as root instead of user account.")))
.subcommand(SubCommand::with_name("terminal")
.arg(Arg::with_name("help").long("help").hidden(true))
.about("Launch terminal in current or named realm")
.arg(Arg::with_name("realm-name")
.help("Name of realm to open terminal in. Use current realm if omitted.")))
.subcommand(SubCommand::with_name("start")
.arg(Arg::with_name("help").long("help").hidden(true))
.about("Start named realm or default realm")
.arg(Arg::with_name("realm-name")
.help("Name of realm to start. Use default realm if omitted.")))
.subcommand(SubCommand::with_name("stop")
.arg(Arg::with_name("help").long("help").hidden(true))
.about("Stop a running realm by name")
.arg(Arg::with_name("realm-name")
.required(true)
.help("Name of realm to stop.")))
.subcommand(SubCommand::with_name("default")
.arg(Arg::with_name("help").long("help").hidden(true))
.about("Choose a realm to start automatically on boot")
.arg(Arg::with_name("realm-name")
.help("Name of a realm to set as default. Display current default realm if omitted.")))
.subcommand(SubCommand::with_name("current")
.arg(Arg::with_name("help").long("help").hidden(true))
.about("Choose a realm to set as 'current' realm")
.arg(Arg::with_name("realm-name")
.help("Name of a realm to set as current, will start if necessary. Display current realm name if omitted.")))
.subcommand(SubCommand::with_name("run")
.arg(Arg::with_name("help").long("help").hidden(true))
.about("Execute a command in named realm or current realm")
.arg(Arg::with_name("realm-name")
.help("Name of realm to run command in, start if necessary. Use current realm if omitted."))
.arg(Arg::with_name("args")
.required(true)
.last(true)
.allow_hyphen_values(true)
.multiple(true)))
.subcommand(SubCommand::with_name("update-appimg")
.arg(Arg::with_name("help").long("help").hidden(true))
.about("Launch shell to update application image")
.arg(Arg::with_name("appimg-name")
.long("appimg")
.help("Name of application image in /storage/appimg directory. Default is to use base.appimg")
.takes_value(true)))
.subcommand(SubCommand::with_name("new")
.arg(Arg::with_name("help").long("help").hidden(true))
.about("Create a new realm with the name provided")
.arg(Arg::with_name("realm-name")
.required(true)
.help("Name to assign to newly created realm")))
.subcommand(SubCommand::with_name("remove")
.arg(Arg::with_name("help").long("help").hidden(true))
.about("Remove realm by name")
.arg(Arg::with_name("no-confirm")
.long("no-confirm")
.help("Do not prompt for confirmation."))
.arg(Arg::with_name("remove-home")
.long("remove-home")
.help("Also remove home directory with --no-confirm rather than moving it to /realms/removed-homes"))
.arg(Arg::with_name("realm-name")
.help("Name of realm to remove")
.required(true)));
let matches = app.get_matches();
if matches.is_present("quiet") {
VERBOSE.with(|f| *f.borrow_mut() = false);
}
let result = match matches.subcommand() {
("list", _) => do_list(),
("start", Some(m)) => do_start(m),
("stop", Some(m)) => do_stop(m),
("default", Some(m)) => do_default(m),
("current", Some(m)) => do_current(m),
("run", Some(m)) => do_run(m),
("shell", Some(m)) => do_shell(m),
("terminal", Some(m)) => do_terminal(m),
("new", Some(m)) => do_new(m),
("remove", Some(m)) => do_remove(m),
("update-appimg", _) => do_update_appimg(),
_ => {
let _ = do_list();
exit(0);
},
};
if let Err(e) = result {
warn!("{}", e);
exit(1);
}
}
fn is_root() -> bool {
unsafe {
libc::geteuid() == 0
}
}
fn require_root() -> Result<()> {
if !is_root() {
bail!("You need to do that as root")
}
Ok(())
}
fn do_list() -> Result<()> {
let manager = RealmManager::load()?;
println!();
manager.list()?;
println!("\n 'realms help' for list of commands\n");
Ok(())
}
fn do_start(matches: &ArgMatches) -> Result<()> {
require_root()?;
let mut manager = RealmManager::load()?;
match matches.value_of("realm-name") {
Some(name) => manager.start_named_realm(name)?,
None => manager.start_default()?,
};
Ok(())
}
fn do_stop(matches: &ArgMatches) -> Result<()> {
require_root()?;
let name = matches.value_of("realm-name").unwrap();
let mut manager = RealmManager::load()?;
manager.stop_realm(name)?;
Ok(())
}
fn do_default(matches: &ArgMatches) -> Result<()> {
let manager = RealmManager::load()?;
match matches.value_of("realm-name") {
Some(name) => {
require_root()?;
manager.set_default_by_name(name)?;
},
None => {
if let Some(name) = manager.default_realm_name() {
println!("Default Realm: {}", name);
} else {
println!("No default realm.");
}
},
}
Ok(())
}
fn do_current(matches: &ArgMatches) -> Result<()> {
let manager = RealmManager::load()?;
match matches.value_of("realm-name") {
Some(name) => {
require_root()?;
manager.set_current_by_name(name)?;
},
None => {
if let Some(name) = manager.current_realm_name() {
println!("Current Realm: {}", name);
} else {
println!("No current realm.");
}
},
}
Ok(())
}
fn do_run(matches: &ArgMatches) -> Result<()> {
let args: Vec<&str> = matches.values_of("args").unwrap().collect();
let mut v = Vec::new();
for arg in args {
v.push(arg.to_string());
}
let manager = RealmManager::load()?;
manager.run_in_realm(matches.value_of("realm-name"), &v, true)?;
Ok(())
}
fn do_shell(matches: &ArgMatches) -> Result<()> {
let manager = RealmManager::load()?;
let root = matches.is_present("root-shell");
manager.launch_shell(matches.value_of("realm-name"), root)?;
Ok(())
}
fn do_terminal(matches: &ArgMatches) -> Result<()> {
let manager = RealmManager::load()?;
manager.launch_terminal(matches.value_of("realm-name"))?;
Ok(())
}
fn do_new(matches: &ArgMatches) -> Result<()> {
require_root()?;
let name = matches.value_of("realm-name").unwrap();
let mut manager = RealmManager::load()?;
manager.new_realm(name)?;
Ok(())
}
fn do_remove(matches: &ArgMatches) -> Result<()> {
require_root()?;
let confirm = !matches.is_present("no-confirm");
let save_home = !matches.is_present("remove-home");
let name = matches.value_of("realm-name").unwrap();
let mut manager = RealmManager::load()?;
manager.remove_realm(name, confirm, save_home)?;
Ok(())
}
fn do_update_appimg() -> Result<()> {
require_root()?;
let manager = RealmManager::load()?;
manager.base_appimg_update()
}

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use std::rc::Rc;
use std::cell::RefCell;
use std::path::{Path,PathBuf};
use std::fs;
use std::collections::HashMap;
use std::io::Write;
use Realm;
use Result;
use Systemd;
use RealmSymlinks;
use NetworkConfig;
use util::*;
const REALMS_BASE_PATH: &str = "/realms";
pub struct RealmManager {
/// Map from realm name -> realm
realm_map: HashMap<String, Realm>,
/// Sorted for 'list'
realm_list: Vec<Realm>,
/// track status of 'current' and 'default' symlinks
symlinks: Rc<RefCell<RealmSymlinks>>,
/// finds free ip addresses to use
network: Rc<RefCell<NetworkConfig>>,
/// interface to systemd
systemd: Systemd,
}
impl RealmManager {
fn new() -> Result<RealmManager> {
let network = RealmManager::create_network_config()?;
Ok(RealmManager {
realm_map: HashMap::new(),
realm_list: Vec::new(),
symlinks: Rc::new(RefCell::new(RealmSymlinks::new())),
network: network.clone(),
systemd: Systemd::new(network),
})
}
fn create_network_config() -> Result<Rc<RefCell<NetworkConfig>>> {
let mut network = NetworkConfig::new();
network.add_bridge("clear", "172.17.0.0/24")?;
Ok(Rc::new(RefCell::new(network)))
}
pub fn load() -> Result<RealmManager> {
let mut manager = RealmManager::new()?;
manager.symlinks.borrow_mut().load_symlinks()?;
if ! PathBuf::from(REALMS_BASE_PATH).exists() {
bail!("realms base directory {} does not exist", REALMS_BASE_PATH);
}
for dent in fs::read_dir(REALMS_BASE_PATH)? {
let path = dent?.path();
manager.process_realm_path(&path)
.map_err(|e| format_err!("error processing entry {} in realm base dir: {}", path.display(), e))?;
}
manager.realm_list.sort_unstable();
Ok(manager)
}
///
/// Process `path` as an entry from the base realms directory and
/// if `path` is a directory, and directory name has prefix "realm-"
/// extract chars after prefix as realm name and add a new `Realm`
/// instance
///
fn process_realm_path(&mut self, path: &Path) -> Result<()> {
let meta = path.symlink_metadata()?;
if !meta.is_dir() {
return Ok(())
}
let fname = path_filename(path);
if !fname.starts_with("realm-") {
return Ok(())
}
let (_, realm_name) = fname.split_at(6);
if !is_valid_realm_name(realm_name) {
warn!("ignoring directory in realm storage which has invalid realm name: {}", realm_name);
return Ok(())
}
let rootfs = path.join("rootfs");
if !rootfs.exists() {
warn!("realm directory {} does not have a rootfs, ignoring", path.display());
return Ok(())
}
match Realm::new(realm_name, self.symlinks.clone(), self.network.clone()) {
Ok(realm) => { self.add_realm_entry(realm);} ,
Err(e) => warn!("Ignoring '{}': {}", realm_name, e),
};
Ok(())
}
fn add_realm_entry(&mut self, realm: Realm) -> &Realm {
self.realm_map.insert(realm.name().to_owned(), realm.clone());
self.realm_list.push(realm.clone());
self.realm_map.get(realm.name()).expect("cannot find realm we just added to map")
}
fn remove_realm_entry(&mut self, name: &str) -> Result<()> {
self.realm_map.remove(name);
let list = self.realm_list.clone();
let mut have_default = false;
self.realm_list.clear();
for realm in list {
if realm.name() != name {
if realm.is_default() {
have_default = true;
}
self.realm_list.push(realm);
}
}
if !have_default && !self.realm_list.is_empty() {
self.symlinks.borrow_mut().set_default_symlink(self.realm_list[0].name())?;
}
Ok(())
}
pub fn current_realm_name(&self) -> Option<String> {
self.symlinks.borrow().current()
}
pub fn default_realm_name(&self) -> Option<String> {
self.symlinks.borrow().default()
}
///
/// Execute shell in a realm. If `realm_name` is `None` then exec
/// shell in current realm, otherwise look up realm by name.
///
/// If `root_shell` is true, open a root shell, otherwise open
/// a user (uid = 1000) shell.
///
pub fn launch_shell(&self, realm_name: Option<&str>, root_shell: bool) -> Result<()> {
let run_shell = |realm: &Realm| {
info!("opening shell in realm '{}'", realm.name());
realm.exec_shell(root_shell)?;
info!("exiting shell in realm '{}'", realm.name());
Ok(())
};
if let Some(name) = realm_name {
self.with_named_realm(name, true, run_shell)
} else {
self.with_current_realm(run_shell)
}
}
pub fn launch_terminal(&self, name: Option<&str>) -> Result<()> {
let run_terminal = |realm: &Realm| {
info!("opening terminal in realm '{}'", realm.name());
let title_arg = format!("Realm: {}", realm.name());
realm.run(&["/usr/bin/gnome-terminal".to_owned(), "--title".to_owned(), title_arg], true)
};
if let Some(name) = name {
self.with_named_realm(name, true, run_terminal)
} else {
self.with_current_realm(run_terminal)
}
}
pub fn run_in_realm(&self, realm_name: Option<&str>, args: &[String], use_launcher: bool) -> Result<()> {
if let Some(name) = realm_name {
self.with_named_realm(name, true, |realm| realm.run(args, use_launcher))
} else {
self.with_current_realm(|realm| realm.run(args, use_launcher))
}
}
fn with_current_realm<F: Fn(&Realm)->Result<()>>(&self, f: F) -> Result<()> {
match self.symlinks.borrow().current() {
Some(ref name) => {
self.with_named_realm(name, false, f)?;
},
None => {
warn!("No current realm instance to run command in");
}
}
Ok(())
}
fn with_named_realm<F: Fn(&Realm)->Result<()>>(&self, name: &str, want_start: bool, f: F) -> Result<()> {
match self.realm(name) {
Some(realm) => {
if want_start && !realm.is_running()? {
info!("realm '{}' is not running, starting it.", realm.name());
self.start_realm(realm)?;
}
f(realm)
},
None => bail!("no realm with name '{}' exists", name),
}
}
pub fn list(&self) -> Result<()> {
let mut out = ColoredOutput::new();
self.print_realm_header(&mut out);
for realm in &self.realm_list {
self.print_realm(realm, &mut out)?;
}
Ok(())
}
fn print_realm_header(&self, out: &mut ColoredOutput) {
out.write(" REALMS ").bold("bold").write(": current, ").bright("colored")
.write(": running, (default) starts on boot\n").write(" ------\n\n");
}
fn print_realm(&self, realm: &Realm, out: &mut ColoredOutput) -> Result<()> {
let name = format!("{:12}", realm.name());
if realm.is_current() {
out.write(" > ").bold(&name);
} else if realm.is_running()? {
out.write(" ").bright(&name);
} else {
out.write(" ").dim(&name);
}
if realm.is_default() {
out.write(" (default)");
}
out.write("\n");
Ok(())
}
pub fn start_default(&mut self) -> Result<()> {
let default = self.symlinks.borrow().default();
if let Some(ref realm_name) = default {
self.start_named_realm(realm_name)?;
return Ok(());
}
bail!("No default realm to start");
}
pub fn start_named_realm(&mut self, realm_name: &str) -> Result<()> {
info!("starting realm '{}'", realm_name);
self.with_named_realm(realm_name, false, |realm| self.start_realm(realm))
}
fn start_realm(&self, realm: &Realm) -> Result<()> {
let mut symlinks = self.symlinks.borrow_mut();
let no_current_realm = symlinks.current().is_none();
// no realm is current, so make this realm the current one
// service file for realm will also start desktopd, so this symlink
// must be created before launching realm.
if no_current_realm {
symlinks.set_current_symlink(Some(realm.name()))?;
}
if let Err(e) = realm.start() {
if no_current_realm {
// oops realm failed to start, need to reset symlink we changed
symlinks.set_current_symlink(None)?;
}
return Err(e);
}
Ok(())
}
pub fn stop_realm(&mut self, name: &str) -> Result<()> {
match self.realm_map.get(name) {
Some(realm) => {
realm.stop()?;
self.set_current_if_none()?;
},
None => {
warn!("Cannot stop '{}'. Realm does not exist", name);
return Ok(())
},
};
Ok(())
}
fn set_current_if_none(&self) -> Result<()> {
let mut symlinks = self.symlinks.borrow_mut();
if symlinks.current().is_some() {
return Ok(());
}
if let Some(ref name) = self.find_running_realm_name()? {
symlinks.set_current_symlink(Some(name))?;
self.systemd.restart_desktopd()?;
} else {
self.systemd.stop_desktopd()?;
}
Ok(())
}
fn find_running_realm_name(&self) -> Result<Option<String>> {
for realm in self.realm_map.values() {
if realm.is_running()? {
return Ok(Some(realm.name().to_string()));
}
}
Ok(None)
}
pub fn set_current_by_name(&self, realm_name: &str) -> Result<()> {
self.with_named_realm(realm_name, false, |realm| realm.set_current())
}
pub fn set_default_by_name(&self, realm_name: &str) -> Result<()> {
self.with_named_realm(realm_name, false, |realm| realm.set_default())
}
pub fn realm_name_exists(&self, name: &str) -> bool {
self.realm_map.contains_key(name)
}
pub fn realm(&self, name: &str) -> Option<&Realm> {
self.realm_map.get(name)
}
pub fn new_realm(&mut self, name: &str) -> Result<&Realm> {
if !is_valid_realm_name(name) {
bail!("'{}' is not a valid realm name. Only letters, numbers and dash '-' symbol allowed in name. First character must be a letter", name);
} else if self.realm_name_exists(name) {
bail!("A realm with name '{}' already exists", name);
}
let realm = Realm::new(name, self.symlinks.clone(), self.network.clone())?;
match realm.create_realm_directory() {
Ok(()) => Ok(self.add_realm_entry(realm)),
Err(e) => {
fs::remove_dir_all(realm.base_path())?;
Err(e)
},
}
}
pub fn remove_realm(&mut self, realm_name: &str, confirm: bool, save_home: bool) -> Result<()> {
self.with_named_realm(realm_name, false, |realm| {
if realm.base_path().join(".realmlock").exists() {
warn!("Realm '{}' has .realmlock file in base directory to protect it from deletion.", realm.name());
warn!("Remove this file from {} before running 'realms remove {}' if you really want to delete it", realm.base_path().display(), realm.name());
return Ok(());
}
let mut save_home = save_home;
if confirm {
if !RealmManager::confirm_delete(realm.name(), &mut save_home)? {
return Ok(());
}
}
realm.delete_realm(save_home)?;
self.set_current_if_none()
})?;
self.remove_realm_entry(realm_name)?;
Ok(())
}
fn confirm_delete(realm_name: &str, save_home: &mut bool) -> Result<bool> {
let you_sure = RealmManager::prompt_user(&format!("Are you sure you want to remove realm '{}'?", realm_name), false)?;
if !you_sure {
info!("Ok, not removing");
return Ok(false);
}
println!("\nThe home directory for this realm can be saved in /realms/removed/home-{}\n", realm_name);
*save_home = RealmManager::prompt_user("Would you like to save the home directory?", true)?;
Ok(true)
}
fn prompt_user(prompt: &str, default_y: bool) -> Result<bool> {
let yn = if default_y { "(Y/n)" } else { "(y/N)" };
use std::io::{stdin,stdout};
print!("{} {} : ", prompt, yn);
stdout().flush()?;
let mut line = String::new();
stdin().read_line(&mut line)?;
let yes = match line.trim().chars().next() {
Some(c) => c == 'Y' || c == 'y',
None => default_y,
};
Ok(yes)
}
pub fn base_appimg_update(&self) -> Result<()> {
info!("Entering root shell on base appimg");
self.systemd.base_image_update_shell()
}
}

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use std::path::PathBuf;
use std::net::Ipv4Addr;
use std::collections::{HashSet,HashMap};
use std::io::{BufReader,BufRead,Write};
use std::fs::{self,File};
use Result;
const MIN_MASK: usize = 16;
const MAX_MASK: usize = 24;
const RESERVED_OCTET: u32 = 213;
/// Manage ip address assignment for bridges
pub struct NetworkConfig {
allocators: HashMap<String, BridgeAllocator>,
}
impl NetworkConfig {
pub fn new() -> NetworkConfig {
NetworkConfig {
allocators: HashMap::new(),
}
}
pub fn add_bridge(&mut self, name: &str, network: &str) -> Result<()> {
let allocator = BridgeAllocator::for_bridge(name, network)
.map_err(|e| format_err!("Failed to create bridge allocator: {}", e))?;
self.allocators.insert(name.to_owned(), allocator);
Ok(())
}
pub fn gateway(&self, bridge: &str) -> Result<String> {
match self.allocators.get(bridge) {
Some(allocator) => Ok(allocator.gateway()),
None => bail!("Failed to return gateway address for bridge {} because it does not exist", bridge),
}
}
pub fn allocate_address_for(&mut self, bridge: &str, realm_name: &str) -> Result<String> {
match self.allocators.get_mut(bridge) {
Some(allocator) => allocator.allocate_address_for(realm_name),
None => bail!("Failed to allocate address for bridge {} because it does not exist", bridge),
}
}
pub fn free_allocation_for(&mut self, bridge: &str, realm_name: &str) -> Result<()> {
match self.allocators.get_mut(bridge) {
Some(allocator) => allocator.free_allocation_for(realm_name),
None => bail!("Failed to free address on bridge {} because it does not exist", bridge),
}
}
pub fn reserved(&self, bridge: &str) -> Result<String> {
match self.allocators.get(bridge) {
Some(allocator) => Ok(allocator.reserved()),
None => bail!("Failed to return reserved address for bridge {} because it does not exist", bridge),
}
}
}
///
/// Allocates IP addresses for a bridge shared by multiple realms.
///
/// State information is stored in /run/realms/network-$bridge as
/// colon ':' separated pairs of realm name and allocated ip address
///
/// realm-a:172.17.0.2
/// realm-b:172.17.0.3
///
struct BridgeAllocator {
bridge: String,
network: Ipv4Addr,
mask_size: usize,
allocated: HashSet<Ipv4Addr>,
allocations: HashMap<String, Ipv4Addr>,
}
impl BridgeAllocator {
pub fn for_bridge(bridge: &str, network: &str) -> Result<BridgeAllocator> {
let (addr_str, mask_size) = match network.find('/') {
Some(idx) => {
let (net,bits) = network.split_at(idx);
(net.to_owned(), bits[1..].parse()?)
},
None => (network.to_owned(), 24),
};
if mask_size > MAX_MASK || mask_size < MIN_MASK {
bail!("Unsupported network mask size of {}", mask_size);
}
let mask = (1u32 << (32 - mask_size)) - 1;
let ip = addr_str.parse::<Ipv4Addr>()?;
if (u32::from(ip) & mask) != 0 {
bail!("network {} has masked bits with netmask /{}", addr_str, mask_size);
}
let mut conf = BridgeAllocator::new(bridge, ip, mask_size);
conf.load_state()?;
Ok(conf)
}
fn new(bridge: &str, network: Ipv4Addr, mask_size: usize) -> BridgeAllocator {
let mut allocator = BridgeAllocator {
bridge: bridge.to_owned(),
allocated: HashSet::new(),
allocations: HashMap::new(),
network, mask_size,
};
let rsv = u32::from(network) | RESERVED_OCTET;
allocator.allocated.insert(Ipv4Addr::from(rsv));
allocator
}
fn allocate_address_for(&mut self, realm_name: &str) -> Result<String> {
match self.find_free_address() {
Some(addr) => {
self.allocated.insert(addr.clone());
if let Some(old) = self.allocations.insert(realm_name.to_owned(), addr.clone()) {
self.allocated.remove(&old);
}
self.write_state()?;
return Ok(format!("{}/{}", addr, self.mask_size));
},
None => bail!("No free IP address could be found to assign to {}", realm_name),
}
}
fn find_free_address(&self) -> Option<Ipv4Addr> {
let mask = (1u32 << (32 - self.mask_size)) - 1;
let net = u32::from(self.network);
for i in 2..mask {
let addr = Ipv4Addr::from(net + i);
if !self.allocated.contains(&addr) {
return Some(addr);
}
}
None
}
fn gateway(&self) -> String {
let gw = u32::from(self.network) + 1;
let addr = Ipv4Addr::from(gw);
addr.to_string()
}
fn reserved(&self) -> String {
let rsv = u32::from(self.network) | RESERVED_OCTET;
let addr = Ipv4Addr::from(rsv);
format!("{}/{}", addr, self.mask_size)
}
fn free_allocation_for(&mut self, realm_name: &str) -> Result<()> {
match self.allocations.remove(realm_name) {
Some(ip) => {
self.allocated.remove(&ip);
self.write_state()?;
}
None => warn!("No address allocation found for realm {}", realm_name),
};
Ok(())
}
fn state_file_path(&self) -> PathBuf {
PathBuf::from(format!("/run/realms/network-{}", self.bridge))
}
fn load_state(&mut self) -> Result<()> {
let path = self.state_file_path();
if !path.exists() {
return Ok(())
}
let f = File::open(path)?;
let reader = BufReader::new(f);
for line in reader.lines() {
let line = &line?;
self.parse_state_line(line)?;
}
Ok(())
}
fn parse_state_line(&mut self, line: &str) -> Result<()> {
match line.find(":") {
Some(idx) => {
let (name,addr) = line.split_at(idx);
let ip = addr[1..].parse::<Ipv4Addr>()?;
self.allocated.insert(ip.clone());
self.allocations.insert(name.to_owned(), ip);
},
None => bail!("Could not parse line from network state file: {}", line),
}
Ok(())
}
fn write_state(&mut self) -> Result<()> {
let path = self.state_file_path();
let dir = path.parent().unwrap();
if !dir.exists() {
fs::create_dir_all(dir)
.map_err(|e| format_err!("failed to create directory {} for network allocation state file: {}", dir.display(), e))?;
}
let mut f = File::create(&path)
.map_err(|e| format_err!("failed to open network state file {} for writing: {}", path.display(), e))?;
for (realm,addr) in &self.allocations {
writeln!(f, "{}:{}", realm, addr)?;
}
Ok(())
}
}

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use std::path::{PathBuf,Path};
use std::rc::Rc;
use std::cmp::Ordering;
use std::cell::{RefCell,Cell};
use std::fs::{self,File};
use std::os::unix::fs::{symlink,MetadataExt};
use {RealmConfig,Result,Systemd,NetworkConfig};
use util::*;
use appimg::*;
const REALMS_BASE_PATH: &str = "/realms";
const REALMS_RUN_PATH: &str = "/run/realms";
#[derive(Clone)]
pub struct Realm {
/// The realm name. Corresponds to a directory with path /realms/realm-$name/
name: String,
/// modify time of timestamp file which is updated when realm is set to current.
ts: Cell<i64>,
/// Configuration options, either default values or values read from file /realms/realm-$name/config
config: RealmConfig,
/// wrapper around various calls to systemd utilities
systemd: Systemd,
/// reads and manages 'current' and 'default' symlinks, shared between all instances
symlinks: Rc<RefCell<RealmSymlinks>>,
}
impl Realm {
pub fn new(name: &str, symlinks: Rc<RefCell<RealmSymlinks>>, network: Rc<RefCell<NetworkConfig>>) -> Result<Realm> {
let mut realm = Realm {
name: name.to_string(),
ts: Cell::new(0),
systemd: Systemd::new(network),
config: RealmConfig::default(), symlinks,
};
realm.load_config()?;
realm.load_timestamp()?;
Ok(realm)
}
fn load_config(&mut self) -> Result<()> {
let path = self.base_path().join("config");
self.config = RealmConfig::load_or_default(&path)
.map_err(|e| format_err!("failed to load realm config file {}: {}", path.display(), e))?;
Ok(())
}
pub fn config(&self) -> &RealmConfig {
&self.config
}
pub fn base_path(&self) -> PathBuf {
PathBuf::from(REALMS_BASE_PATH).join(format!("realm-{}", self.name))
}
pub fn set_default(&self) -> Result<()> {
if self.is_default() {
info!("Realm '{}' is already default realm", self.name());
return Ok(())
}
self.symlinks.borrow_mut().set_default_symlink(&self.name)?;
info!("Realm '{}' set as default realm", self.name());
Ok(())
}
pub fn set_current(&self) -> Result<()> {
if self.is_current() {
info!("Realm '{}' is already current realm", self.name());
return Ok(())
}
if !self.is_running()? {
self.start()?;
}
self.symlinks.borrow_mut().set_current_symlink(Some(&self.name))?;
self.systemd.restart_desktopd()?;
self.update_timestamp()?;
info!("Realm '{}' set as current realm", self.name());
Ok(())
}
pub fn is_default(&self) -> bool {
self.symlinks.borrow().is_name_default(&self.name)
}
pub fn is_current(&self) -> bool {
self.symlinks.borrow().is_name_current(&self.name)
}
pub fn is_running(&self) -> Result<bool> {
self.systemd.realm_is_active(self)
}
pub fn run(&self, args: &[String], use_launcher: bool) -> Result<()> {
self.systemd.machinectl_shell(self, args, use_launcher)?;
Ok(())
}
pub fn exec_shell(&self, as_root: bool) -> Result<()> {
self.systemd.machinectl_exec_shell(self, as_root)
}
pub fn start(&self) -> Result<()> {
self.systemd.start_realm(self)?;
info!("Started realm '{}'", self.name());
Ok(())
}
pub fn stop(&self) -> Result<()> {
self.systemd.stop_realm(self)?;
if self.is_current() {
self.symlinks.borrow_mut().set_current_symlink(None)?;
}
info!("Stopped realm '{}'", self.name());
Ok(())
}
pub fn name(&self) -> &str {
&self.name
}
fn load_timestamp(&self) -> Result<()> {
let tstamp = self.base_path().join(".tstamp");
if tstamp.exists() {
let meta = tstamp.metadata()?;
self.ts.set(meta.mtime());
}
Ok(())
}
/// create an empty file which is used to track the time at which
/// this realm was last made 'current'. These times are used
/// to order the output when listing realms.
fn update_timestamp(&self) -> Result<()> {
let tstamp = self.base_path().join(".tstamp");
if tstamp.exists() {
fs::remove_file(&tstamp)?;
}
File::create(&tstamp)
.map_err(|e| format_err!("failed to create timestamp file {}: {}", tstamp.display(), e))?;
// also load the new value
self.load_timestamp()?;
Ok(())
}
pub fn create_realm_directory(&self) -> Result<()> {
if self.base_path().exists() {
bail!("realm base directory {} already exists, cannot create", self.base_path().display());
}
fs::create_dir(self.base_path())
.map_err(|e| format_err!("failed to create realm base directory {}: {}", self.base_path().display(), e))?;
self.create_home_directory()
.map_err(|e| format_err!("failed to create realm home directory {}: {}", self.base_path().join("home").display(), e))?;
// This must be last step because if an error is returned caller assumes that subvolume was
// never created and does not need to be removed.
clone_base_appimg(self)?;
Ok(())
}
fn create_home_directory(&self) -> Result<()> {
let home = self.base_path().join("home");
fs::create_dir(&home)?;
chown(&home, 1000, 1000)?;
let skel = PathBuf::from(REALMS_BASE_PATH).join("skel");
if skel.exists() {
info!("Populating realm home directory with files from {}", skel.display());
copy_tree(&skel, &home)?;
}
Ok(())
}
pub fn delete_realm(&self, save_home: bool) -> Result<()> {
if save_home {
self.save_home_for_delete()?;
}
if self.is_running()? {
self.stop()?;
}
info!("removing rootfs subvolume for '{}'", self.name());
delete_rootfs_subvolume(self)?;
info!("removing realm directory {}", self.base_path().display());
fs::remove_dir_all(self.base_path())?;
info!("realm '{}' has been removed", self.name());
Ok(())
}
fn save_home_for_delete(&self) -> Result<()> {
let target = PathBuf::from(&format!("/realms/removed/home-{}", self.name()));
if !Path::new("/realms/removed").exists() {
fs::create_dir("/realms/removed")?;
}
fs::rename(self.base_path().join("home"), &target)
.map_err(|e| format_err!("unable to move realm home directory to {}: {}", target.display(), e))?;
info!("home directory been moved to /realms/removed/home-{}, delete it at your leisure", self.name());
Ok(())
}
}
impl Ord for Realm {
fn cmp(&self, other: &Realm) -> Ordering {
let self_run = self.is_running().unwrap_or(false);
let other_run = other.is_running().unwrap_or(false);
if self_run && !other_run {
Ordering::Less
} else if !self_run && other_run {
Ordering::Greater
} else {
let self_ts = self.ts.get();
let other_ts = other.ts.get();
other_ts.cmp(&self_ts)
}
}
}
impl PartialOrd for Realm {
fn partial_cmp(&self, other: &Realm) -> Option<Ordering> {
Some(self.cmp(other))
}
}
impl PartialEq for Realm {
fn eq(&self, other: &Realm) -> bool {
self.cmp(other) == Ordering::Equal
}
}
impl Eq for Realm {}
pub struct RealmSymlinks {
current_name: Option<String>,
default_name: Option<String>,
}
impl RealmSymlinks {
pub fn new() -> RealmSymlinks {
RealmSymlinks {
current_name: None,
default_name: None,
}
}
pub fn load_symlinks(&mut self) -> Result<()> {
self.current_name = self.resolve_realm_name(&PathBuf::from(REALMS_RUN_PATH).join("current.realm"))?;
self.default_name = self.resolve_realm_name(&PathBuf::from(REALMS_BASE_PATH).join("default.realm"))?;
Ok(())
}
fn is_name_default(&self, name: &str) -> bool {
match self.default() {
Some(dname) => dname == name,
None => false,
}
}
fn is_name_current(&self, name: &str) -> bool {
match self.current() {
Some(cname) => cname == name,
None => false,
}
}
pub fn current(&self) -> Option<String> {
self.current_name.clone()
}
pub fn default(&self) -> Option<String> {
self.default_name.clone()
}
pub fn set_current_symlink(&mut self, name: Option<&str>) -> Result<()> {
let runpath = Path::new(REALMS_RUN_PATH);
if !runpath.exists() {
fs::create_dir_all(runpath)
.map_err(|e| format_err!("failed to create realm runtime directory {}: {}", runpath.display(), e))?;
}
let path = runpath.join("current.realm");
if let Some(n) = name {
let tmp = Path::new("/run/current.realm.tmp");
let target = PathBuf::from(REALMS_BASE_PATH).join(format!("realm-{}", n));
symlink(&target, tmp)
.map_err(|e| format_err!("failed to create symlink from {} to {}: {}", tmp.display(), target.display(), e))?;
fs::rename(tmp, &path)
.map_err(|e| format_err!("failed to rename symlink from {} to {}: {}", tmp.display(), path.display(), e))?;
self.current_name = Some(n.to_owned());
} else {
if path.exists() {
fs::remove_file(&path)
.map_err(|e| format_err!("failed to remove current symlink {}: {}", path.display(), e))?;
}
self.current_name = None;
}
Ok(())
}
pub fn set_default_symlink(&mut self, name: &str) -> Result<()> {
let path = PathBuf::from(REALMS_BASE_PATH).join("default.realm");
let tmp = Path::new("/realms/default.realm.tmp");
let target = format!("realm-{}", name);
symlink(&target, tmp)
.map_err(|e| format_err!("failed to create symlink from {} to {}: {}", tmp.display(), target, e))?;
fs::rename(tmp, &path)
.map_err(|e| format_err!("failed to rename symlink from {} to {}: {}", tmp.display(), path.display(), e))?;
self.default_name = Some(name.to_owned());
Ok(())
}
fn resolve_realm_name(&self, path: &Path) -> Result<Option<String>> {
if !path.exists() {
return Ok(None);
}
let meta = path.symlink_metadata()?;
if !meta.file_type().is_symlink() {
bail!("{} exists but it is not a symlink", path.display());
}
let target = RealmSymlinks::absolute_target(path)?;
RealmSymlinks::ensure_subdir_of_base(path, &target)?;
if !target.is_dir() {
bail!("target of symlink {} is not a directory", path.display());
}
let filename = path_filename(&target);
if !filename.starts_with("realm-") {
bail!("target of symlink {} is not a realm directory", path.display());
}
Ok(Some(filename[6..].to_string()))
}
/// Read target of symlink `path` and resolve it to an absolute
/// path
fn absolute_target(path: &Path) -> Result<PathBuf> {
let target = fs::read_link(path)?;
if target.is_absolute() {
Ok(target)
} else if target.components().count() == 1 {
match path.parent() {
Some(parent) => return Ok(parent.join(target)),
None => bail!("Cannot resolve absolute path of symlink target because symlink path has no parent"),
}
} else {
bail!("symlink target has invalid value: {}", target.display())
}
}
fn ensure_subdir_of_base(path: &Path, target: &Path) -> Result<()> {
let realms_base = PathBuf::from(REALMS_BASE_PATH);
match target.parent() {
Some(parent) => {
if parent != realms_base.as_path() {
bail!("target of symlink {} points outside of {} directory: {}", path.display(), REALMS_BASE_PATH, target.display());
}
},
None => bail!("target of symlink {} has invalid value (no parent): {}", path.display(), target.display()),
}
Ok(())
}
}

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use std::rc::Rc;
use std::cell::RefCell;
use std::process::Command;
use std::path::{Path,PathBuf};
use std::fs::{self,File};
use std::fmt::Write;
use std::io::Write as IoWrite;
use std::env;
const SYSTEMCTL_PATH: &str = "/usr/bin/systemctl";
const MACHINECTL_PATH: &str = "/usr/bin/machinectl";
const SYSTEMD_NSPAWN_PATH: &str = "/run/systemd/nspawn";
const SYSTEMD_UNIT_PATH: &str = "/run/systemd/system";
const DESKTOPD_SERVICE: &str = "citadel-desktopd.service";
use Realm;
use NetworkConfig;
use Result;
use util::{path_filename,is_first_char_alphabetic};
#[derive(Clone)]
pub struct Systemd {
network: Rc<RefCell<NetworkConfig>>,
}
impl Systemd {
pub fn new(network: Rc<RefCell<NetworkConfig>>) -> Systemd {
Systemd { network }
}
pub fn realm_is_active(&self, realm: &Realm) -> Result<bool> {
let active = self.is_active(&self.realm_service_name(realm))?;
let has_config = self.realm_config_exists(realm);
if active && !has_config {
bail!("Realm {} is running, but config files are missing", realm.name());
}
if !active && has_config {
bail!("Realm {} is not running, but config files are present", realm.name());
}
Ok(active)
}
pub fn start_realm(&self, realm: &Realm) -> Result<()> {
if self.realm_is_active(realm)? {
warn!("Realm {} is already running", realm.name());
return Ok(())
}
self.write_realm_launch_config(realm)?;
self.systemctl_start(&self.realm_service_name(realm))?;
if realm.config().emphemeral_home() {
self.setup_ephemeral_home(realm)?;
}
Ok(())
}
pub fn base_image_update_shell(&self) -> Result<()> {
let netconf = self.network.borrow_mut();
let gw = netconf.gateway("clear")?;
let addr = netconf.reserved("clear")?;
let gw_env = format!("--setenv=IFCONFIG_GW={}", gw);
let addr_env = format!("--setenv=IFCONFIG_IP={}", addr);
Command::new("/usr/bin/systemd-nspawn")
.args(&[
&addr_env, &gw_env,
"--quiet",
"--machine=base-appimg-update",
"--directory=/storage/appimg/base.appimg",
"--network-zone=clear",
"/bin/bash", "-c", "/usr/libexec/configure-host0.sh && exec /bin/bash"
]).status()?;
Ok(())
}
fn setup_ephemeral_home(&self, realm: &Realm) -> Result<()> {
// 1) if exists: machinectl copy-to /realms/skel /home/user
if Path::new("/realms/skel").exists() {
self.machinectl_copy_to(realm, "/realms/skel", "/home/user")?;
}
// 2) if exists: machinectl copy-to /realms/realm-$name /home/user
let realm_skel = realm.base_path().join("skel");
if realm_skel.exists() {
self.machinectl_copy_to(realm, realm_skel.to_str().unwrap(), "/home/user")?;
}
let home = realm.base_path().join("home");
if !home.exists() {
return Ok(());
}
// 3) for each : machinectl bind /realms/realm-$name/home/$dir /home/user/$dir
for dent in fs::read_dir(home)? {
let path = dent?.path();
self.bind_mount_home_subdir(realm, &path)?;
}
Ok(())
}
fn bind_mount_home_subdir(&self, realm: &Realm, path: &Path) -> Result<()> {
let path = path.canonicalize()?;
if !path.is_dir() {
return Ok(());
}
let fname = path_filename(&path);
if !is_first_char_alphabetic(fname) {
return Ok(());
}
let from = format!("/realms/realm-{}/home/{}", realm.name(), fname);
let to = format!("/home/user/{}", fname);
self.machinectl_bind(realm, &from, &to)?;
Ok(())
}
pub fn stop_realm(&self, realm: &Realm) -> Result<()> {
if !self.realm_is_active(realm)? {
warn!("Realm {} is not running", realm.name());
return Ok(());
}
self.systemctl_stop(&self.realm_service_name(realm))?;
self.remove_realm_launch_config(realm)?;
self.network.borrow_mut().free_allocation_for(realm.config().network_zone(), realm.name())?;
Ok(())
}
pub fn restart_desktopd(&self) -> Result<bool> {
self.systemctl_restart(DESKTOPD_SERVICE)
}
pub fn stop_desktopd(&self) -> Result<bool> {
self.systemctl_stop(DESKTOPD_SERVICE)
}
fn realm_service_name(&self, realm: &Realm) -> String {
format!("realm-{}.service", realm.name())
}
fn is_active(&self, name: &str) -> Result<bool> {
Command::new(SYSTEMCTL_PATH)
.args(&["--quiet", "is-active", name])
.status()
.map(|status| status.success())
.map_err(|e| format_err!("failed to execute{}: {}", MACHINECTL_PATH, e))
}
fn systemctl_restart(&self, name: &str) -> Result<bool> {
self.run_systemctl("restart", name)
}
fn systemctl_start(&self, name: &str) -> Result<bool> {
self.run_systemctl("start", name)
}
fn systemctl_stop(&self, name: &str) -> Result<bool> {
self.run_systemctl("stop", name)
}
fn run_systemctl(&self, op: &str, name: &str) -> Result<bool> {
Command::new(SYSTEMCTL_PATH)
.arg(op)
.arg(name)
.status()
.map(|status| status.success())
.map_err(|e| format_err!("failed to execute {}: {}", MACHINECTL_PATH, e))
}
fn machinectl_copy_to(&self, realm: &Realm, from: &str, to: &str) -> Result<()> {
Command::new(MACHINECTL_PATH)
.args(&["copy-to", realm.name(), from, to ])
.status()
.map_err(|e| format_err!("failed to machinectl copy-to {} {} {}: {}", realm.name(), from, to, e))?;
Ok(())
}
fn machinectl_bind(&self, realm: &Realm, from: &str, to: &str) -> Result<()> {
Command::new(MACHINECTL_PATH)
.args(&["--mkdir", "bind", realm.name(), from, to ])
.status()
.map_err(|e| format_err!("failed to machinectl bind {} {} {}: {}", realm.name(), from, to, e))?;
Ok(())
}
pub fn machinectl_exec_shell(&self, realm: &Realm, as_root: bool) -> Result<()> {
let namevar = format!("--setenv=REALM_NAME={}", realm.name());
let user = if as_root { "root" } else { "user" };
let user_at_host = format!("{}@{}", user, realm.name());
Command::new(MACHINECTL_PATH)
.args(&[ &namevar, "--quiet", "shell", &user_at_host, "/bin/bash"])
.status()
.map_err(|e| format_err!("failed to execute{}: {}", MACHINECTL_PATH, e))?;
Ok(())
}
pub fn machinectl_shell(&self, realm: &Realm, args: &[String], launcher: bool) -> Result<()> {
let namevar = format!("--setenv=REALM_NAME={}", realm.name());
let mut cmd = Command::new(MACHINECTL_PATH);
cmd.arg("--quiet");
match env::var("DESKTOP_STARTUP_ID") {
Ok(val) => {
cmd.arg("-E");
cmd.arg(&format!("DESKTOP_STARTUP_ID={}", val));
},
Err(_) => {},
};
cmd.arg(&namevar);
cmd.arg("shell");
cmd.arg(format!("user@{}", realm.name()));
if launcher {
cmd.arg("/usr/libexec/launch");
}
for arg in args {
cmd.arg(&arg);
}
cmd.status().map_err(|e| format_err!("failed to execute{}: {}", MACHINECTL_PATH, e))?;
Ok(())
}
fn realm_service_path(&self, realm: &Realm) -> PathBuf {
PathBuf::from(SYSTEMD_UNIT_PATH).join(self.realm_service_name(realm))
}
fn realm_nspawn_path(&self, realm: &Realm) -> PathBuf {
PathBuf::from(SYSTEMD_NSPAWN_PATH).join(format!("{}.nspawn", realm.name()))
}
fn realm_config_exists(&self, realm: &Realm) -> bool {
self.realm_service_path(realm).exists() || self.realm_nspawn_path(realm).exists()
}
fn remove_realm_launch_config(&self, realm: &Realm) -> Result<()> {
let nspawn_path = self.realm_nspawn_path(realm);
if nspawn_path.exists() {
fs::remove_file(&nspawn_path)?;
}
let service_path = self.realm_service_path(realm);
if service_path.exists() {
fs::remove_file(&service_path)?;
}
Ok(())
}
fn write_realm_launch_config(&self, realm: &Realm) -> Result<()> {
let nspawn_path = self.realm_nspawn_path(realm);
let nspawn_content = self.generate_nspawn_file(realm)?;
self.write_launch_config_file(&nspawn_path, &nspawn_content)
.map_err(|e| format_err!("failed to write nspawn config file {}: {}", nspawn_path.display(), e))?;
let service_path = self.realm_service_path(realm);
let service_content = self.generate_service_file(realm);
self.write_launch_config_file(&service_path, &service_content)
.map_err(|e| format_err!("failed to write service config file {}: {}", service_path.display(), e))?;
Ok(())
}
/// Write the string `content` to file `path`. If the directory does
/// not already exist, create it.
fn write_launch_config_file(&self, path: &Path, content: &str) -> Result<()> {
match path.parent() {
Some(parent) => {
if !parent.exists() {
fs::create_dir_all(parent)?;
}
},
None => bail!("config file path {} has no parent?", path.display()),
};
let mut f = File::create(path)?;
f.write_all(content.as_bytes())?;
Ok(())
}
fn generate_nspawn_file(&self, realm: &Realm) -> Result<String> {
Ok(NSPAWN_FILE_TEMPLATE
.replace("$EXTRA_BIND_MOUNTS", &self.generate_extra_bind_mounts(realm)?)
.replace("$NETWORK_CONFIG", &self.generate_network_config(realm)?))
}
fn generate_extra_bind_mounts(&self, realm: &Realm) -> Result<String> {
let config = realm.config();
let mut s = String::new();
if config.emphemeral_home() {
writeln!(s, "TemporaryFileSystem=/home/user:mode=755,uid=1000,gid=1000")?;
} else {
writeln!(s, "Bind={}/home:/home/user", realm.base_path().display())?;
}
if config.shared_dir() && Path::new("/realms/Shared").exists() {
writeln!(s, "Bind=/realms/Shared:/home/user/Shared")?;
}
if config.kvm() {
writeln!(s, "Bind=/dev/kvm")?;
}
if config.gpu() {
writeln!(s, "Bind=/dev/dri/renderD128")?;
}
if config.sound() {
writeln!(s, "Bind=/dev/snd")?;
writeln!(s, "Bind=/dev/shm")?;
writeln!(s, "BindReadOnly=/run/user/1000/pulse:/run/user/host/pulse")?;
}
if config.x11() {
writeln!(s, "BindReadOnly=/tmp/.X11-unix")?;
}
if config.wayland() {
writeln!(s, "BindReadOnly=/run/user/1000/wayland-0:/run/user/host/wayland-0")?;
}
Ok(s)
}
fn generate_network_config(&self, realm: &Realm) -> Result<String> {
let mut s = String::new();
if realm.config().network() {
let mut netconf = self.network.borrow_mut();
let zone = realm.config().network_zone();
let addr = netconf.allocate_address_for(zone, realm.name())?;
let gw = netconf.gateway(zone)?;
writeln!(s, "Environment=IFCONFIG_IP={}", addr)?;
writeln!(s, "Environment=IFCONFIG_GW={}", gw)?;
writeln!(s, "[Network]")?;
writeln!(s, "Zone=clear")?;
} else {
writeln!(s, "[Network]")?;
writeln!(s, "Private=true")?;
}
Ok(s)
}
fn generate_service_file(&self, realm: &Realm) -> String {
let rootfs = format!("/realms/realm-{}/rootfs", realm.name());
REALM_SERVICE_TEMPLATE.replace("$REALM_NAME", realm.name()).replace("$ROOTFS", &rootfs)
}
}
pub const NSPAWN_FILE_TEMPLATE: &str = r###"
[Exec]
Boot=true
$NETWORK_CONFIG
[Files]
BindReadOnly=/usr/share/themes
BindReadOnly=/usr/share/icons/Paper
BindReadOnly=/storage/citadel-state/resolv.conf:/etc/resolv.conf
$EXTRA_BIND_MOUNTS
"###;
pub const REALM_SERVICE_TEMPLATE: &str = r###"
[Unit]
Description=Application Image $REALM_NAME instance
Wants=citadel-desktopd.service
[Service]
Environment=SYSTEMD_NSPAWN_SHARE_NS_IPC=1
ExecStart=/usr/bin/systemd-nspawn --quiet --notify-ready=yes --keep-unit --machine=$REALM_NAME --link-journal=try-guest --directory=$ROOTFS
KillMode=mixed
Type=notify
RestartForceExitStatus=133
SuccessExitStatus=133
"###;

137
citadel-realms/src/util.rs Normal file
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@ -0,0 +1,137 @@
use std::path::Path;
use std::fs;
use std::os::unix::ffi::OsStrExt;
use std::os::unix::fs::MetadataExt;
use std::ffi::CString;
use std::io::{self,Write};
use libc;
use walkdir::WalkDir;
use Result;
pub fn path_filename(path: &Path) -> &str {
if let Some(osstr) = path.file_name() {
if let Some(name) = osstr.to_str() {
return name;
}
}
""
}
fn is_alphanum_or_dash(c: char) -> bool {
is_ascii(c) && (c.is_alphanumeric() || c == '-')
}
fn is_ascii(c: char) -> bool {
c as u32 <= 0x7F
}
pub fn is_first_char_alphabetic(s: &str) -> bool {
if let Some(c) = s.chars().next() {
return is_ascii(c) && c.is_alphabetic()
}
false
}
const MAX_REALM_NAME_LEN:usize = 128;
/// Valid realm names:
/// * must start with an alphabetic ascii letter character
/// * may only contain ascii characters which are letters, numbers, or the dash '-' symbol
/// * must not be empty or have a length exceeding 128 characters
pub fn is_valid_realm_name(name: &str) -> bool {
name.len() <= MAX_REALM_NAME_LEN &&
// Also false on empty string
is_first_char_alphabetic(name) &&
name.chars().all(is_alphanum_or_dash)
}
pub fn chown(path: &Path, uid: u32, gid: u32) -> io::Result<()> {
let cstr = CString::new(path.as_os_str().as_bytes())?;
unsafe {
if libc::chown(cstr.as_ptr(), uid, gid) == -1 {
return Err(io::Error::last_os_error());
}
}
Ok(())
}
fn copy_path(from: &Path, to: &Path) -> Result<()> {
if to.exists() {
bail!("destination path {} already exists which is not expected", to.display());
}
let meta = from.metadata()?;
if from.is_dir() {
fs::create_dir(to)?;
} else {
fs::copy(&from, &to)?;
}
chown(to, meta.uid(), meta.gid())?;
Ok(())
}
pub fn copy_tree(from_base: &Path, to_base: &Path) -> Result<()> {
for entry in WalkDir::new(from_base) {
let path = entry?.path().to_owned();
let to = to_base.join(path.strip_prefix(from_base)?);
if &to != to_base {
copy_path(&path, &to)
.map_err(|e| format_err!("failed to copy {} to {}: {}", path.display(), to.display(), e))?;
}
}
Ok(())
}
use termcolor::{ColorChoice,Color,ColorSpec,WriteColor,StandardStream};
pub struct ColoredOutput {
color_bright: ColorSpec,
color_bold: ColorSpec,
color_dim: ColorSpec,
stream: StandardStream,
}
impl ColoredOutput {
pub fn new() -> ColoredOutput {
ColoredOutput::new_with_colors(Color::Rgb(0, 110, 180), Color::Rgb(100, 100, 80))
}
pub fn new_with_colors(bright: Color, dim: Color) -> ColoredOutput {
let mut out = ColoredOutput {
color_bright: ColorSpec::new(),
color_bold: ColorSpec::new(),
color_dim: ColorSpec::new(),
stream: StandardStream::stdout(ColorChoice::AlwaysAnsi),
};
out.color_bright.set_fg(Some(bright.clone()));
out.color_bold.set_fg(Some(bright)).set_bold(true);
out.color_dim.set_fg(Some(dim));
out
}
pub fn write(&mut self, s: &str) -> &mut Self {
write!(&mut self.stream, "{}", s).unwrap();
self.stream.reset().unwrap();
self
}
pub fn bright(&mut self, s: &str) -> &mut Self {
self.stream.set_color(&self.color_bright).unwrap();
self.write(s)
}
pub fn bold(&mut self, s: &str) -> &mut Self {
self.stream.set_color(&self.color_bold).unwrap();
self.write(s)
}
pub fn dim(&mut self, s: &str) -> &mut Self {
self.stream.set_color(&self.color_dim).unwrap();
self.write(s)
}
}

475
libcitadel/Cargo.lock generated Normal file
View File

@ -0,0 +1,475 @@
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18
libcitadel/Cargo.toml Normal file
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@ -0,0 +1,18 @@
[package]
name = "libcitadel"
version = "0.1.0"
authors = ["Bruce Leidl <bruce@subgraph.com>"]
[dependencies]
libc = "0.2"
nix = "0.12.0"
failure = "0.1.3"
ed25519-dalek = "0.8.1"
sha2 = "0.7.0"
rand = "0.6"
toml = "0.4.10"
serde = "1.0.82"
serde_derive = "1.0.82"
rustc-serialize = "0.3.24"
lazy_static = "1.2.0"

170
libcitadel/src/blockdev.rs Normal file
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@ -0,0 +1,170 @@
use std::path::Path;
use std::fs::File;
use std::io::{Read,Write,Seek,SeekFrom};
use std::os::unix::io::AsRawFd;
use std::fs::OpenOptions;
use std::os::unix::fs::OpenOptionsExt;
use libc;
use Result;
// IO on block devices requires 4096 byte aligned buffer
const REQUIRED_ALIGNMENT: usize = 4096;
const DEFAULT_ALIGNMENT: usize = REQUIRED_ALIGNMENT;
/// A byte buffer from which references can be acquired that have correctly
/// aligned physical base address for block device I/O operations.
pub struct AlignedBuffer {
buffer: Vec<u8>,
alignment: usize,
size: usize,
align_offset: usize,
}
impl AlignedBuffer {
pub fn new(size: usize) -> AlignedBuffer {
AlignedBuffer::new_with_alignment(size, DEFAULT_ALIGNMENT)
}
pub fn from_slice(bytes: &[u8]) -> AlignedBuffer {
AlignedBuffer::from_slice_with_alignment(bytes, DEFAULT_ALIGNMENT)
}
pub fn new_with_alignment(size: usize, alignment: usize) -> AlignedBuffer {
AlignedBuffer {
alignment, size,
buffer: vec![0u8; size + alignment],
align_offset: 0,
}
}
pub fn from_slice_with_alignment(bytes: &[u8], alignment: usize) -> AlignedBuffer {
let mut ab = AlignedBuffer::new_with_alignment(bytes.len(), alignment);
ab.as_mut().copy_from_slice(bytes);
ab
}
//
// Calculates an offset into `self.buffer` array that is physically
// located at a 4096 byte alignment boundary and returns slice at
// this offset. `self.align_offset` is set so that access functions
// will use the right offset.
//
// I/O on block devices must use 4k aligned memory:
//
// https://people.redhat.com/msnitzer/docs/io-limits.txt
//
// Or maybe just 512 byte aligned memory:
//
// https://www.quora.com/Why-does-O_DIRECT-require-I-O-to-be-512-byte-aligned
//
fn align_buffer(&mut self) {
let addr = self.buffer.as_ptr() as usize;
let offset = self.alignment - (addr & (self.alignment - 1));
self.align_offset = offset;
}
}
impl AsRef<[u8]> for AlignedBuffer {
fn as_ref(&self) -> &[u8] {
let start = self.align_offset;
let end = start + self.size;
&(self.buffer.as_slice())[start..end]
}
}
impl AsMut<[u8]> for AlignedBuffer {
fn as_mut(&mut self) -> &mut [u8] {
self.align_buffer();
let start = self.align_offset;
let end = start + self.size;
&mut self.buffer.as_mut_slice()[start..end]
}
}
pub const SECTOR_SIZE: usize = 512;
pub const ALIGNMENT_MASK: usize = 4095;
ioctl_read!(blk_getsize64, 0x12, 114, u64);
/// A block device which is open for reading or writing.
pub struct BlockDev {
file: File,
}
impl BlockDev {
/// Open a block device for read-only operations.
pub fn open_ro<P: AsRef<Path>>(path: P) -> Result<BlockDev> {
BlockDev::open(path.as_ref(), false)
}
/// Open a block device for read-write operations.
pub fn open_rw<P: AsRef<Path>>(path: P) -> Result<BlockDev> {
BlockDev::open(path.as_ref(), true)
}
fn open(path: &Path, write: bool) -> Result<BlockDev> {
let mut oo = OpenOptions::new();
oo.read(true);
oo.custom_flags(libc::O_DIRECT | libc::O_SYNC);
if write {
oo.write(true);
}
let file = oo.open(path)
.map_err(|e| format_err!("Failed to open block device {}: {}", path.display(), e))?;
Ok(BlockDev{file})
}
/// Returns the size of this block device in bytes.
pub fn size(&self) -> Result<u64> {
let mut sz = 0u64;
unsafe {
blk_getsize64(self.file.as_raw_fd(), &mut sz)
.map_err(|e| format_err!("Error calling getsize ioctl on block device: {}", e))?;
}
Ok(sz)
}
/// Return the number of 512 byte sectors on this block device.
pub fn nsectors(&self) -> Result<usize> {
Ok((self.size()? as usize) >> 9)
}
// Validate that `buffer` address is properly aligned and that the size of the
// buffer is multiple of sector size and that the offset and buffer size do
// not exceed size of device. Then `seek` the device to the correct location
// for the read or write operation.
fn setup_io(&mut self, offset: usize, buffer: &[u8]) -> Result<()> {
let addr = buffer.as_ptr() as usize;
if addr & ALIGNMENT_MASK != 0 {
bail!("block device i/o attempted with incorrectly aligned buffer: {:p}", buffer);
}
if buffer.len() % SECTOR_SIZE != 0 {
bail!("buffer length {} is not a multiple of sector size", buffer.len());
}
let count = buffer.len() / SECTOR_SIZE;
if offset + count > self.nsectors()? {
bail!("sector_io({}, {}) is past end of device", offset, buffer.len());
}
self.file.seek(SeekFrom::Start((offset * SECTOR_SIZE) as u64))?;
Ok(())
}
/// Read sectors from device at sector `offset` into `buffer`.
/// The buffer must be a multiple of sector size (512 bytes).
pub fn read_sectors(&mut self, offset: usize, buffer: &mut [u8]) -> Result<()> {
self.setup_io(offset, buffer)?;
self.file.read_exact(buffer)?;
Ok(())
}
/// Write sectors from `buffer` to device starting at sector `offset`.
/// The buffer must be a multiple of sector size (512 bytes).
pub fn write_sectors(&mut self, offset: usize, buffer: &[u8]) -> Result<()> {
self.setup_io(offset, buffer)?;
self.file.write_all(buffer)?;
Ok(())
}
}

247
libcitadel/src/cmdline.rs Normal file
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@ -0,0 +1,247 @@
use std::collections::HashMap;
use std::path::Path;
use {Result,PathExt};
lazy_static! {
static ref CMDLINE: CommandLine = match CommandLine::load() {
Ok(cl) => cl,
Err(err) => {
warn!("Failed to load kernel command line: {}", err);
CommandLine::new()
}
};
}
/// Kernel command line parsed from /proc/cmdline into a map
/// of Key / Value pairs. The value is optional since some
/// variables are flags and do not have a value.
///
/// This class is a lazy constructed singleton.
#[derive(Clone)]
pub struct CommandLine {
varmap: HashMap<String,Option<String>>,
}
impl CommandLine {
/// Returns true if the variable `name` is present on the kernel command line.
pub fn var_exists(name: &str) -> bool {
CMDLINE._var_exists(name)
}
/// Return a value for the variable `name` if a value is present on the kernel command line for this variable.
/// Will return `None` if variable does not exist or if variable is present but does not have a value.
pub fn get_value(name: &str) -> Option<&str> {
CMDLINE._get_value(name)
}
/// Return `true` if variable citadel.noverity is present on kernel command line.
pub fn noverity() -> bool {
CommandLine::var_exists("citadel.noverity")
}
/// Return `true` if variable citadel.install is present on kernel command line.
pub fn install_mode() -> bool {
CommandLine::var_exists("citadel.install")
}
/// Return `true` if variable citadel.recovery is present on kernel command line.
pub fn recovery_mode() -> bool {
CommandLine::var_exists("citadel.recovery")
}
pub fn verbose() -> bool {
CommandLine::var_exists("citadel.verbose")
}
fn new() -> CommandLine {
CommandLine{ varmap: HashMap::new() }
}
fn load() -> Result<CommandLine> {
let s = Path::new("/proc/cmdline").read_as_string()?;
let varmap = CommandLineParser::new(s).parse();
Ok(CommandLine{varmap})
}
fn _var_exists(&self, name: &str) -> bool {
self.varmap.contains_key(name)
}
fn _get_value(&self, name: &str) -> Option<&str> {
if let Some(val) = self.varmap.get(name) {
// 'name' exists
if let Some(ref v) = *val {
// has an associated value (name=value)
return Some(v)
}
}
// otherwise None
None
}
}
#[derive(Clone)]
enum ParseState {
// In whitespace between options
Whitespace,
// In option name, preceeding '=' char
Name(String),
// In value after '=' char
Value(String,String),
// First char was a '-', expecting double '--'
InDash,
// In quoted value, whitespace allowed
InQuoted(String, String),
// Last char was closing '"' char, expect only whitespace next
QuotedEnd(String, String),
// Failed to parse an option, remain in state BAD until whitespace
Bad,
}
// Parser for kernel command line
struct CommandLineParser {
cmdline: String,
varmap: HashMap<String, Option<String>>,
pos: usize,
}
impl CommandLineParser {
fn new(cmdline: String) -> CommandLineParser {
CommandLineParser {
cmdline,
varmap: HashMap::new(),
pos: 0,
}
}
fn parse(mut self) -> HashMap<String, Option<String>> {
// Append a space to cause final item to be processed
let cmdline = self.cmdline.clone() + " ";
let mut state = ParseState::Whitespace;
for c in cmdline.chars() {
state = match state {
ParseState::Whitespace => self.parse_whitespace(c),
ParseState::Name(name) => self.parse_name(c, name),
ParseState::Value(name, value) => self.parse_value(c, name, value),
ParseState::InDash => self.parse_in_dash(c),
ParseState::InQuoted(name, value) => self.parse_in_quoted(c, name, value),
ParseState::QuotedEnd(name, value) => self.parse_quoted_end(c, name, value),
ParseState::Bad => self.parse_bad(c),
};
self.pos += 1;
}
self.varmap
}
fn parse_whitespace(&mut self, c: char) -> ParseState {
match c {
ch if ch.is_whitespace() => ParseState::Whitespace,
ch if ch.is_ascii_alphanumeric() => ParseState::Name(ch.to_string()),
_ => {
self.unexpected_char(c, "as initial character of option name")
}
}
}
fn parse_name(&mut self, c: char, mut name: String) -> ParseState {
match c {
'_' | '-' => {
name.push('-');
ParseState::Name(name)
},
'=' => ParseState::Value(name, String::new()),
ch if ch.is_whitespace() => {
self.varmap.insert(name, None);
ParseState::Whitespace
},
ch if ch.is_ascii_alphanumeric() || ch == '.' => {
name.push(ch);
ParseState::Name(name)
},
_ => {
self.unexpected_char(c, "parsing option name")
},
}
}
fn parse_value(&mut self, c: char, name: String, mut value: String) -> ParseState {
match c {
'"' if value.is_empty() => ParseState::InQuoted(name, value),
ch if ch.is_whitespace() => {
self.varmap.insert(name, Some(value));
ParseState::Whitespace
},
ch if ch.is_ascii() => {
value.push(ch);
ParseState::Value(name, value)
},
_ => {
self.unexpected_char(c, "parsing option value")
}
}
}
fn parse_in_dash(&mut self, c: char) -> ParseState {
// Only supposed to be double dash, but we'll accept any number of consecutive dashes
if c.is_whitespace() {
ParseState::Whitespace
} else if c == '-' {
ParseState::InDash
} else {
self.unexpected_char(c, "after initial dash character")
}
}
fn parse_in_quoted(&mut self, c: char, name: String, mut value: String) -> ParseState {
if c == '"' {
ParseState::QuotedEnd(name, value)
} else {
value.push(c);
ParseState::InQuoted(name, value)
}
}
fn parse_quoted_end(&mut self, c: char, name: String, value: String) -> ParseState {
if c.is_whitespace() {
self.varmap.insert(name, Some(value));
return ParseState::Whitespace
}
self.unexpected_char(c, "after closing quote character")
}
fn parse_bad(&mut self, c: char) -> ParseState {
if c.is_whitespace() {
ParseState::Whitespace
} else {
ParseState::Bad
}
}
fn unexpected_char(&self, c: char, msg: &str) -> ParseState {
warn!("Parsing kernel commandline: {}", self.cmdline);
warn!("Unexpected char '{}' at position {} {}", c, self.pos, msg);
ParseState::Bad
}
}
#[test]
fn foo() {
let cline = CommandLine::load().unwrap();
println!("hello");
println!("cline: {:?}", cline.varmap);
}

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use std::path::{Path,PathBuf};
use std::collections::HashMap;
use ed25519_dalek::{Signature,PublicKey,Keypair};
use rustc_serialize::hex::FromHex;
use sha2::Sha512;
use toml;
use {Result,PathExt};
const DEFAULT_CONFIG_PATH: &str = "/usr/share/citadel/citadel-image.conf";
#[derive(Deserialize)]
pub struct Config {
#[serde (rename="default-channel")]
default_channel: Option<String>,
#[serde (rename="default-citadel-base")]
default_citadel_base: Option<String>,
channel: HashMap<String, Channel>,
}
impl Config {
pub fn load_default() -> Result<Config> {
Config::load(DEFAULT_CONFIG_PATH)
}
pub fn load<P: AsRef<Path>>(path: P) -> Result<Config> {
let config = match Config::from_path(path.as_ref()) {
Ok(config) => config,
Err(e) => bail!("Failed to load config file {}: {}", path.as_ref().display(), e),
};
Ok(config)
}
fn from_path(path: &Path) -> Result<Config> {
let s = path.read_as_string()?;
let mut config = toml::from_str::<Config>(&s)?;
for (k,v) in config.channel.iter_mut() {
v.name = k.to_string();
}
Ok(config)
}
pub fn get_default_citadel_base(&self) -> Option<PathBuf> {
match self.default_citadel_base {
Some(ref base) => Some(PathBuf::from(base)),
None => None,
}
}
pub fn get_default_channel(&self) -> Option<Channel> {
if let Some(ref name) = self.default_channel {
if let Some(c) = self.channel(name) {
return Some(c);
}
}
if self.channel.len() == 1 {
return self.channel.values().next().map(|c| c.clone());
}
None
}
pub fn channel(&self, name: &str) -> Option<Channel> {
self.channel.get(name).map(|c| c.clone() )
}
pub fn get_private_key(&self, channel: &str) -> Option<String> {
if let Some(channel_config) = self.channel.get(channel) {
if let Some(ref key) = channel_config.keypair {
return Some(key.clone());
}
}
None
}
pub fn get_public_key(&self, channel: &str) -> Option<String> {
if let Some(channel_config) = self.channel.get(channel) {
return Some(channel_config.pubkey.clone());
}
None
}
}
#[derive(Deserialize,Clone)]
pub struct Channel {
update_server: Option<String>,
pubkey: String,
keypair: Option<String>,
#[serde(skip)]
name: String,
}
impl Channel {
pub fn name(&self) -> &str {
&self.name
}
pub fn sign(&self, data: &[u8]) -> Result<Signature> {
let keybytes = match self.keypair {
Some(ref hex) => hex.from_hex()?,
None => bail!("No private signing key available for channel {}", self.name),
};
let privkey = Keypair::from_bytes(&keybytes)?;
let sig = privkey.sign::<Sha512>(data);
Ok(sig)
}
pub fn verify(&self, data: &[u8], sigbytes: &[u8]) -> Result<()> {
let keybytes = self.pubkey.from_hex()?;
let pubkey = PublicKey::from_bytes(&keybytes)?;
let sig = Signature::from_bytes(sigbytes)?;
pubkey.verify::<Sha512>(data, &sig)?;
Ok(())
}
}

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use std::path::{Path,PathBuf};
use {Result,PathExt};
// Partition Type GUID of UEFI boot (ESP) partition
const ESP_GUID: &str = "c12a7328-f81f-11d2-ba4b-00a0c93ec93b";
///
/// Represents a disk partition device on the system
///
/// A wrapper around the fields from a line in /proc/partitions
///
#[derive(Debug)]
pub struct DiskPartition {
path: PathBuf,
major: u8,
minor: u8,
blocks: usize,
}
impl DiskPartition {
/// Return list of all UEFI ESP partitions on the system as a `Vec<DiskPartition>`
pub fn boot_partitions() -> Result<Vec<DiskPartition>> {
let mut v = Vec::new();
for line in Path::new("/proc/partitions").read_as_lines()?.iter().skip(2) {
let part = DiskPartition::from_proc_line(&line)
.map_err(|e| format_err!("Failed to parse line '{}': {}", line, e))?;
if part.is_esp() {
v.push(part);
}
}
Ok(v)
}
// Parse a single line from /proc/partitions
//
// Example line:
//
// 8 1 523264 sda1
//
fn from_proc_line(line: &str) -> Result<DiskPartition> {
let v = line.split_whitespace().collect::<Vec<_>>();
if v.len() != 4 {
bail!("could not parse");
}
Ok(DiskPartition::from_line_components(
v[0].parse::<u8>()?, // Major
v[1].parse::<u8>()?, // Minor
v[2].parse::<usize>()?, // number of blocks
v[3])) // device name
}
// create a new `DiskPartion` from parsed components of line from /proc/partitions
fn from_line_components(major: u8, minor: u8, blocks: usize, name: &str) -> DiskPartition {
DiskPartition {
path: PathBuf::from("/dev").join(name),
major, minor, blocks,
}
}
// return `true` if partition has UEFI ESP partition type
fn is_esp(&self) -> bool {
match self.path.partition_type_guid() {
Ok(guid) => guid == ESP_GUID,
Err(err) => {
warn!("Error: {}", err);
false
},
}
}
pub fn path(&self) -> &Path {
&self.path
}
pub fn mount<P: AsRef<Path>>(&self, target: P) -> bool {
match self.path.mount(target) {
Err(e) => {
warn!("{}", e);
false
},
Ok(()) => true,
}
}
pub fn umount(&self) -> bool {
match self.path.umount() {
Err(e) => {
warn!("{}", e);
false
},
Ok(()) => true,
}
}
}

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use std::cell::RefCell;
use std::path::Path;
use std::fs::File;
use std::io::{Write,Read};
use failure::ResultExt;
use toml;
use {Channel,Config,Result,BlockDev};
use blockdev::AlignedBuffer;
/// Expected magic value in header
const MAGIC: &[u8] = b"SGOS";
/// Offset into header of the start of the metainfo document
const METAINFO_OFFSET: usize = 8;
/// Signature is 64 bytes long
const SIGNATURE_LENGTH: usize = 64;
/// Maximum amount of space in block for metainfo document
const MAX_METAINFO_LEN: usize = (ImageHeader::HEADER_SIZE - (METAINFO_OFFSET + SIGNATURE_LENGTH));
fn is_valid_status_code(code: u8) -> bool {
code <= ImageHeader::STATUS_BAD_META
}
///
/// The Image Header structure is stored in a 4096 byte block at the start of
/// every resource image file. When an image is installed to a partition it
/// is stored at the last 4096 byte block of the block device for the partition.
///
/// The layout of this structure is the following:
///
/// field size (bytes) offset
/// ----- ------------ ------
///
/// magic 4 0
/// status 1 4
/// flags 1 5
/// length 2 6
///
/// metainfo <length> 8
///
/// signature 64 8 + length
///
/// magic : Must match ascii bytes 'SGOS' for the header to be considered valid
///
/// status : One of the `STATUS` constants defined below
///
/// flags : May contain 'FLAG' values defined below.
///
/// length : The size of the metainfo field in bytes as a 16-bit Big Endian value
///
/// metainfo : A utf-8 encoded TOML document with various fields describing the image
///
/// signature : ed25519 signature over the bytes of the metainfo field
///
#[derive(Clone)]
pub struct ImageHeader(RefCell<Vec<u8>>);
const CODE_TO_LABEL: [&str; 7] = ["Invalid", "New", "Try Boot", "Good", "Failed Boot", "Bad Signature", "Bad Metainfo"];
impl ImageHeader {
pub const FLAG_PREFER_BOOT : u8 = 0x01; // Set to override usual strategy for choosing a partition to boot and force this one.
pub const FLAG_HASH_TREE : u8 = 0x02; // dm-verity hash tree data is appended to the image
pub const FLAG_DATA_COMPRESSED : u8 = 0x04; // The image data is compressed and needs to be uncompressed before use.
pub const STATUS_INVALID : u8 = 0; // Set on partition before writing a new rootfs disk image
pub const STATUS_NEW : u8 = 1; // Set on partition after write of new rootfs disk image completes successfully
pub const STATUS_TRY_BOOT : u8 = 2; // Set on boot selected partition if in `STATUS_NEW` state.
pub const STATUS_GOOD : u8 = 3; // Set on boot when a `STATUS_TRY_BOOT` partition successfully launches desktop
pub const STATUS_FAILED : u8 = 4; // Set on boot for any partition in state `STATUS_TRY_BOOT`
pub const STATUS_BAD_SIG : u8 = 5; // Set on boot selected partition when signature fails to verify
pub const STATUS_BAD_META : u8 = 6; // Set on partition when metainfo cannot be parsed
/// Size of header block
pub const HEADER_SIZE: usize = 4096;
pub fn new() -> ImageHeader {
let v = vec![0u8; ImageHeader::HEADER_SIZE];
let header = ImageHeader(RefCell::new(v));
header.write_bytes(0, MAGIC);
header
}
pub fn from_file<P: AsRef<Path>>(path: P) -> Result<ImageHeader> {
//let mut v = vec![0u8; ImageHeader::HEADER_SIZE];
// XXX check file size is at least HEADER_SIZE
let mut f = File::open(path.as_ref())?;
ImageHeader::from_reader(&mut f)
//f.read_exact(&mut v)?;
//Ok(ImageHeader(RefCell::new(v)))
}
pub fn from_reader<R: Read>(r: &mut R) -> Result<ImageHeader> {
let mut v = vec![0u8; ImageHeader::HEADER_SIZE];
r.read_exact(&mut v)?;
Ok(ImageHeader(RefCell::new(v)))
}
pub fn from_partition<P: AsRef<Path>>(path: P) -> Result<ImageHeader> {
let mut dev = BlockDev::open_ro(path.as_ref())?;
let nsectors = dev.nsectors()?;
ensure!(nsectors >= 8, "{} is a block device bit it's too short ({} sectors)", path.as_ref().display(), nsectors);
let mut buffer = AlignedBuffer::new(ImageHeader::HEADER_SIZE);
dev.read_sectors(nsectors - 8, buffer.as_mut())?;
let header = ImageHeader(RefCell::new(buffer.as_ref().into()));
Ok(header)
}
pub fn write_partition<P: AsRef<Path>>(&self, path: P) -> Result<()> {
let mut dev = BlockDev::open_rw(path.as_ref())?;
let nsectors = dev.nsectors()?;
ensure!(nsectors >= 8, "{} is a block device bit it's too short ({} sectors)", path.as_ref().display(), nsectors);
let buffer = AlignedBuffer::from_slice(&self.0.borrow());
dev.write_sectors(nsectors - 8, buffer.as_ref())?;
Ok(())
}
pub fn verified_metainfo(&self, config: &Config) -> Result<MetaInfo> {
let mlen = self.metainfo_len();
if mlen == 0 || mlen > MAX_METAINFO_LEN {
bail!("Invalid metainfo-len field: {}", mlen);
}
let mbytes = self.metainfo_bytes();
let mut metainfo = MetaInfo::new(mbytes);
metainfo.parse_toml()?;
metainfo.verify(config, &self.signature())?;
Ok(metainfo)
}
pub fn is_magic_valid(&self) -> bool {
self.read_bytes(0, 4) == MAGIC
}
pub fn status(&self) -> u8 {
self.read_u8(4)
}
pub fn set_status(&self, status: u8) {
self.write_u8(4, status);
}
pub fn status_code_label(&self) -> String {
let code = self.status();
if is_valid_status_code(code) {
CODE_TO_LABEL[code as usize].to_string()
} else {
format!("Invalid status code: {}", code)
}
}
pub fn flags(&self) -> u8 { self.read_u8(5) }
pub fn has_flag(&self, flag: u8) -> bool {
(self.flags() & flag) == flag
}
/// Return `true` if flag value changed
pub fn set_flag(&self, flag: u8) -> bool {
self.change_flag(flag, true)
}
pub fn clear_flag(&self, flag: u8) -> bool {
self.change_flag(flag, false)
}
fn change_flag(&self, flag: u8, set: bool) -> bool {
let old = self.flags();
let new = if set { old | flag } else { old & !flag };
self.write_u8(5, new);
old == new
}
pub fn metainfo_len(&self) -> usize {
self.read_u16(6) as usize
}
pub fn set_metainfo_len(&self, len: usize) {
self.write_u16(6, len as u16);
}
pub fn set_metainfo_bytes(&self, bytes: &[u8]) {
self.set_metainfo_len(bytes.len());
self.write_bytes(8, bytes);
}
pub fn metainfo_bytes(&self) -> Vec<u8> {
let mlen = self.metainfo_len();
assert!(mlen > 0 && mlen < MAX_METAINFO_LEN);
self.read_bytes(METAINFO_OFFSET, mlen)
}
pub fn signature(&self) -> Vec<u8> {
let mlen = self.metainfo_len();
assert!(mlen > 0 && mlen < MAX_METAINFO_LEN);
self.read_bytes(METAINFO_OFFSET + mlen, SIGNATURE_LENGTH)
}
pub fn sign_metainfo(&self, channel: &Channel) -> Result<()> {
let mlen = self.metainfo_len();
// XXX assert mlen is good
let sig = channel.sign(&self.0.borrow()[8..8+mlen])?;
self.write_bytes(8+mlen, &sig.to_bytes());
Ok(())
}
pub fn write_header<W: Write>(&self, mut writer: W) -> Result<()> {
writer.write_all(&self.0.borrow())?;
Ok(())
}
pub fn clear(&self) {
for b in &mut self.0.borrow_mut()[..] {
*b = 0;
}
self.write_bytes(0, MAGIC);
}
fn read_u8(&self, idx: usize) -> u8 {
self.0.borrow()[idx]
}
fn read_u16(&self, idx: usize) -> u16 {
let hi = self.read_u8(idx) as u16;
let lo = self.read_u8(idx + 1) as u16;
(hi << 8) | lo
}
fn write_u8(&self, idx: usize, val: u8) {
self.0.borrow_mut()[idx] = val;
}
fn write_u16(&self, idx: usize, val: u16) {
let hi = (val >> 8) as u8;
let lo = val as u8;
self.write_u8(idx, hi);
self.write_u8(idx + 1, lo);
}
fn write_bytes(&self, offset: usize, data: &[u8]) {
self.0.borrow_mut()[offset..offset+data.len()].copy_from_slice(data)
}
fn read_bytes(&self, offset: usize, len: usize) -> Vec<u8> {
Vec::from(&self.0.borrow()[offset..offset+len])
}
}
#[derive(Clone)]
pub struct MetaInfo {
bytes: Vec<u8>,
is_parsed: bool,
is_valid: bool,
toml: Option<MetaInfoToml>,
}
#[derive(Deserialize,Serialize,Clone)]
struct MetaInfoToml {
channel: String,
version: u32,
#[serde(rename="base-version")]
base_version: Option<u32>,
date: Option<String>,
gitrev: Option<String>,
nblocks: u32,
shasum: String,
#[serde(rename="verity-salt")]
verity_salt: String,
#[serde(rename="verity-root")]
verity_root: String,
}
impl MetaInfo {
fn new(bytes: Vec<u8>) -> MetaInfo {
MetaInfo {
bytes,
is_parsed: false,
is_valid: false,
toml: None,
}
}
pub fn is_valid(&self) -> bool {
self.is_valid
}
pub fn parse_toml(&mut self) -> Result<()> {
if !self.is_parsed {
self.is_parsed = true;
let toml = toml::from_slice::<MetaInfoToml>(&self.bytes)
.context("parsing header metainfo")?;
self.toml = Some(toml);
}
Ok(())
}
pub fn verify(&self, config: &Config, signature: &[u8]) -> Result<()> {
let channel = match config.channel(self.channel()) {
Some(channel) => channel,
None => bail!("Channel '{}' not found in config file", self.channel()),
};
channel.verify(&self.bytes, signature)
.context("Bad metainfo signature in header")?;
Ok(())
}
fn toml(&self) -> &MetaInfoToml {
assert!(self.is_valid);
self.toml.as_ref().unwrap()
}
pub fn channel(&self) -> &str {
self.toml().channel.as_str()
}
pub fn version(&self) -> u32 {
self.toml().version
}
pub fn date(&self) -> Option<&str> {
self.toml().date.as_ref().map(|s| s.as_str())
}
pub fn gitrev(&self) -> Option<&str> {
self.toml().gitrev.as_ref().map(|s| s.as_str())
}
pub fn nblocks(&self) -> usize {
self.toml().nblocks as usize
}
pub fn shasum(&self) -> &str {
&self.toml().shasum
}
pub fn verity_root(&self) -> &str {
&self.toml().verity_root
}
pub fn verity_salt(&self) -> &str {
&self.toml().verity_salt
}
}

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use Result;
use rand::rngs::OsRng;
use sha2::Sha512;
use ed25519_dalek::{self,PublicKey,Keypair,Signature};
use rustc_serialize::hex::{ToHex,FromHex};
pub const SIGNATURE_LENGTH: usize = ed25519_dalek::SIGNATURE_LENGTH;
///
/// Keys for signing or verifying signatures. Small convenience
/// wrapper around `ed25519_dalek`.
///
pub enum SigningKeys {
KEYPAIR(Keypair),
PUBLIC(PublicKey),
}
use self::SigningKeys::*;
impl SigningKeys {
/// Generate a new pair of signing/verifying keys using
/// the system random number generator. The resulting
/// `ed25519_dalek::KeyPair` can be extracted in an ascii
/// hex encoded format for storage in configuration files
/// with the `to_hex()` method.
pub fn generate() -> Result<SigningKeys> {
let mut rng = OsRng::new()?;
let pair = Keypair::generate::<Sha512,_>(&mut rng);
Ok(SigningKeys::KEYPAIR(pair))
}
/// Load a `Keypair` from ascii hex representation.
///
/// The `hex` string is read from a configuration file
/// and is used here to construct a `SigningKeys` instance
/// which can then be used for signing (or verifying).
pub fn from_keypair_hex(hex: String) -> Result<SigningKeys> {
let bytes = hex.from_hex()?;
let pair = Keypair::from_bytes(&bytes)?;
Ok(SigningKeys::KEYPAIR(pair))
}
/// Load only `PublicKey` from ascii hex representation
///
/// The string `hex` is read from a configuration file
/// and is used here to construct a `SigningKeys` instance
/// which can only be used for verifying signatures (not
/// for signing).
pub fn from_public_hex(hex: String) -> Result<SigningKeys> {
let bytes = hex.from_hex()?;
let public = PublicKey::from_bytes(&bytes)?;
Ok(SigningKeys::PUBLIC(public))
}
/// Return ascii hex representation of internal `Keypair`
/// or `PublicKey` depending on which variant `self` is.
///
/// Caller is expected to know which variant is being
/// converted.
pub fn to_hex(&self) -> String {
match *self {
KEYPAIR(ref pair) => pair.to_bytes().to_hex(),
PUBLIC(ref public) => public.to_bytes().to_hex(),
}
}
/// Return ascii hex representation of the `PublicKey` associated
/// with this instance.
pub fn to_public_hex(&self) -> String {
match *self {
KEYPAIR(ref pair) => pair.public.to_bytes().to_hex(),
PUBLIC(ref public) => public.to_bytes().to_hex(),
}
}
/// Sign `data` with the private key associated with this instance
/// using `Sha512` as the hashing algorithm. Caller must ensure
/// that this instance is a `KEYPAIR` variant.
///
/// Returns signature of `data` encoded as a `SIGNATURE_LENGTH`
/// byte array (64 bytes).
///
pub fn sign(&self, data: &[u8]) -> [u8; SIGNATURE_LENGTH] {
let signature = match *self {
KEYPAIR(ref pair) => pair.sign::<Sha512>(data),
_ => panic!("Not a keypair, no signing key"),
};
signature.to_bytes()
}
/// Verify that `signature` is a valid signature for `data` using the
/// `PublicKey` associated with this instance. `signature` must be
/// a slice of `SIGNATURE_LENGTH` bytes.
///
/// Returns `Ok(())` if signature is valid.
///
pub fn verify(&self, data: &[u8], signature: &[u8]) -> Result<()> {
assert_eq!(signature.len(), SIGNATURE_LENGTH, "Signature bytes are not expected length");
let signature = Signature::from_bytes(signature)?;
self.pubkey().verify::<Sha512>(data, &signature)?;
Ok(())
}
fn pubkey(&self) -> &PublicKey {
match *self {
KEYPAIR(ref keypair) => &keypair.public,
PUBLIC(ref public) => &public,
}
}
}

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#[macro_use] extern crate failure;
#[macro_use] extern crate nix;
#[macro_use] extern crate serde_derive;
#[macro_use] extern crate lazy_static;
#[macro_export]
macro_rules! info {
($e:expr) => { if $crate::verbose() { println!("[+] {}", $e);} };
($fmt:expr, $($arg:tt)+) => { if $crate::verbose() { println!("[+] {}", format!($fmt, $($arg)+));} };
}
#[macro_export]
macro_rules! warn {
($e:expr) => { println!("WARNING: {}", $e); };
($fmt:expr, $($arg:tt)+) => { println!("WARNING: {}", format!($fmt, $($arg)+)); };
}
#[macro_export]
macro_rules! notify {
($e:expr) => { println!("[+] {}", $e); };
($fmt:expr, $($arg:tt)+) => { println!("[+] {}", format!($fmt, $($arg)+)); };
}
extern crate libc;
extern crate serde;
extern crate toml;
extern crate ed25519_dalek;
extern crate sha2;
extern crate rand;
extern crate rustc_serialize;
use std::cell::RefCell;
use std::result;
use failure::Error;
thread_local! {
pub static VERBOSE: RefCell<bool> = RefCell::new(false);
}
pub fn verbose() -> bool {
VERBOSE.with(|f| { *f.borrow() })
}
pub fn set_verbose(val: bool) {
VERBOSE.with(|f| { *f.borrow_mut() = val });
}
mod blockdev;
mod config;
mod keys;
mod disks;
mod cmdline;
mod header;
mod partition;
mod resource;
mod path_ext;
pub use config::Config;
pub use config::Channel;
pub use blockdev::BlockDev;
pub use keys::SigningKeys;
pub use cmdline::CommandLine;
pub use header::{ImageHeader,MetaInfo};
pub use path_ext::{PathExt,FileTypeResult,VerityOutput};
pub use partition::Partition;
pub use resource::ResourceImage;
pub type Result<T> = result::Result<T,Error>;
pub const BLOCK_SIZE: usize = 4096;

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use std::path::{Path,PathBuf};
use std::fs;
use {Config,Result,ImageHeader,MetaInfo,PathExt};
#[derive(Clone)]
pub struct Partition {
path: PathBuf,
hinfo: Option<HeaderInfo>,
is_mounted: bool,
}
#[derive(Clone)]
struct HeaderInfo {
header: ImageHeader,
metainfo: MetaInfo,
}
impl Partition {
pub fn rootfs_partitions(config: &Config) -> Result<Vec<Partition>> {
let mut v = Vec::new();
for path in rootfs_partition_paths()? {
let partition = Partition::load(&path, config)?;
v.push(partition);
}
Ok(v)
}
fn load(dev: &Path, config: &Config) -> Result<Partition> {
let is_mounted = is_path_mounted(dev)?;
let header = Partition::load_header(dev, config)?;
Ok(Partition::new(dev, header, is_mounted))
}
fn load_header(dev: &Path, config: &Config) -> Result<Option<HeaderInfo>> {
let header = ImageHeader::from_partition(dev)?;
if !header.is_magic_valid() {
return Ok(None);
}
let metainfo = match header.verified_metainfo(config) {
Ok(metainfo) => metainfo,
Err(e) => {
warn!("Reading partition {}: {}", dev.display(), e);
return Ok(None);
},
};
Ok(Some(HeaderInfo {
header, metainfo
}))
}
fn new(path: &Path, hinfo: Option<HeaderInfo>, is_mounted: bool) -> Partition {
Partition {
path: path.to_owned(),
hinfo, is_mounted,
}
}
pub fn path(&self) -> &Path {
&self.path
}
pub fn is_mounted(&self) -> bool {
self.is_mounted
}
pub fn is_initialized(&self) -> bool {
self.hinfo.is_some()
}
pub fn header(&self) -> &ImageHeader {
assert!(self.is_initialized());
&self.hinfo.as_ref().unwrap().header
}
fn header_mut(&mut self) -> &mut ImageHeader {
assert!(self.is_initialized());
&mut self.hinfo.as_mut().unwrap().header
}
pub fn metainfo(&self) -> &MetaInfo {
assert!(self.is_initialized());
&self.hinfo.as_ref().unwrap().metainfo
}
pub fn is_new(&self) -> bool {
self.header().status() == ImageHeader::STATUS_NEW
}
pub fn is_good(&self) -> bool {
self.header().status() == ImageHeader::STATUS_GOOD
}
pub fn is_preferred(&self) -> bool {
self.header().has_flag(ImageHeader::FLAG_PREFER_BOOT)
}
pub fn write_status(&mut self, status: u8) -> Result<()> {
self.header_mut().set_status(status);
self.header().write_partition(&self.path)
}
/// Called at boot to perform various checks and possibly
/// update the status field to an error state.
///
/// Mark `STATUS_TRY_BOOT` partition as `STATUS_FAILED`.
///
/// If metainfo cannot be parsed, mark as `STATUS_BAD_META`.
///
/// Verify metainfo signature and mark `STATUS_BAD_SIG` if
/// signature verification fails.
///
pub fn boot_scan(&mut self, config: &Config) -> Result<()> {
if !self.is_initialized() {
return Ok(())
}
if self.header().status() == ImageHeader::STATUS_TRY_BOOT {
self.write_status(ImageHeader::STATUS_FAILED)?;
}
// XXX verify signature
Ok(())
}
}
fn rootfs_partition_paths() -> Result<Vec<PathBuf>> {
let mut rootfs_paths = Vec::new();
for dent in fs::read_dir("/dev/mapper")? {
let path = dent?.path();
if is_path_rootfs(&path) {
rootfs_paths.push(path);
}
}
Ok(rootfs_paths)
}
fn is_path_rootfs(path: &Path) -> bool {
path_filename(path).starts_with("citadel-rootfs")
}
fn path_filename(path: &Path) -> &str {
if let Some(osstr) = path.file_name() {
if let Some(name) = osstr.to_str() {
return name;
}
}
""
}
///
/// Returns `true` if `path` matches the source field (first field)
/// of any of the mount lines listed in /proc/mounts
///
pub fn is_path_mounted(path: &Path) -> Result<bool> {
let path_str = path.to_str().unwrap();
for line in Path::new("/proc/mounts").read_as_lines()? {
if let Some(s) = line.split_whitespace().next() {
if s == path_str {
return Ok(true);
}
}
}
Ok(false)
}

354
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use std::collections::HashMap;
use std::fs::File;
use std::io::{BufReader,BufRead,Read};
use std::path::{Path,PathBuf};
use std::process::{Command,Stdio};
use failure::ResultExt;
use Result;
/// A collection of utility methods added to `Path` to perform various types of operations
/// on files and directories.
pub trait PathExt {
/// Run sha256sum command on file `self` and return output as a hex `String`
fn sha256(&self) -> Result<String>;
/// Write file `self` to partition device with dd command.
fn copy_to_partition<P: AsRef<Path>>(&self, partition: P) -> Result<()>;
/// Read entire file `self` and return contents as a `String`
fn read_as_string(&self) -> Result<String>;
/// Read entire file `self` and return contents as a `Vec` of individual lines.
fn read_as_lines(&self) -> Result<Vec<String>>;
/// Return `true` if path `self` is mounted.
fn is_mounted(&self) -> bool;
/// Compress file `self` with xz utility.
fn xz_compress(&self) -> Result<()>;
/// Uncompress file `self` with xz utility.
fn xz_uncompress(&self) -> Result<()>;
/// Run /usr/bin/file command on file `self` and return output as `FileTypeResult`
fn file_type(&self) -> Result<FileTypeResult>;
/// Mount path `self` to `target`
fn mount<P: AsRef<Path>>(&self, target: P) -> Result<()>;
/// Mount path `self` to `target` with additional argument `args` to mount command.
fn mount_with_args<P: AsRef<Path>>(&self, target: P, args: &str) -> Result<()>;
/// Bind mount path `self` to path `target`.
fn bind_mount<P: AsRef<Path>>(&self, target: P) -> Result<()>;
/// Set up loop device for file `self` with optional offset and size limit.
/// Returns `PathBuf` to associated loop device upon success.
fn setup_loop(&self, offset: Option<usize>, sizelimit: Option<usize>) -> Result<PathBuf>;
/// Unmount path `self`
fn umount(&self) -> Result<()>;
/// Return Partition Type GUID for a block device by running lsblk command
fn partition_type_guid(&self) -> Result<String>;
/// Generate dm-verity hashtree for a disk image and store in an external file
/// Parse output from command into VerityOutput structure and return it.
fn verity_initial_hashtree<P: AsRef<Path>>(&self, hashfile: P) -> Result<VerityOutput>;
/// Generate dm-verity hashtree with a given salt value and append it to the same image.
///
/// device
/// Parse output from command into VerityOutput structure and return it.
fn verity_regenerate_hashtree(&self, offset: usize, nblocks: usize, salt: &str) -> Result<VerityOutput>;
///
fn verity_setup(&self, offset: usize, nblocks: usize, roothash: &str, devname: &str) -> Result<()>;
/// Return path as a string without error checking
fn pathstr(&self) -> &str;
}
impl PathExt for Path {
fn sha256(&self) -> Result<String> {
let output = exec_command_with_output("/usr/bin/sha256sum", &[self.pathstr()])
.context(format!("failed to calculate sha256 on {}", self.display()))?;
let v: Vec<&str> = output.split_whitespace().collect();
Ok(v[0].trim().to_owned())
}
fn copy_to_partition<P: AsRef<Path>>(&self, partition: P) -> Result<()> {
let if_arg = format!("if={}", self.pathstr());
let of_arg = format!("of={}", partition.as_ref().pathstr());
exec_command("/usr/bin/dd", &[ if_arg.as_str(), of_arg.as_str(), "bs=4M" ])
.context(format!("failed to copy {} to {} with dd", self.display(), partition.as_ref().display()))?;
Ok(())
}
fn read_as_string(&self) -> Result<String> {
let mut f = File::open(&self)?;
let mut buffer = String::new();
f.read_to_string(&mut buffer)?;
Ok(buffer)
}
fn read_as_lines(&self) -> Result<Vec<String>> {
let mut v = Vec::new();
let f = File::open(&self)?;
let reader = BufReader::new(f);
for line in reader.lines() {
let line = line?;
v.push(line);
}
Ok(v)
}
fn is_mounted(&self) -> bool {
exec_command("/usr/bin/findmnt", &[self.pathstr()]).is_ok()
}
fn xz_compress(&self) -> Result<()> {
exec_command("/usr/bin/xz", &["-T0", self.pathstr()])
.context(format!("failed to compress {}", self.display()))?;
Ok(())
}
fn xz_uncompress(&self) -> Result<()> {
exec_command("/usr/bin/xz", &["-d", self.pathstr()])
.context(format!("failed to uncompress {}", self.display()))?;
Ok(())
}
fn file_type(&self) -> Result<FileTypeResult> {
let output = exec_command_with_output("/usr/bin/file", &["-b", self.pathstr()])
.context(format!("failed to run /usr/bin/file on {}", self.display()))?;
Ok(FileTypeResult(output))
}
fn mount<P: AsRef<Path>>(&self, target: P) -> Result<()> {
let target = target.as_ref().to_str().unwrap();
exec_command("/usr/bin/mount", &[self.pathstr(), target])
.context(format!("failed to mount {}", self.display()))?;
Ok(())
}
fn mount_with_args<P: AsRef<Path>>(&self, target: P, args: &str) -> Result<()> {
let target = target.as_ref().to_str().unwrap();
exec_command("/usr/bin/mount", &[args, self.pathstr(), target])
.context(format!("failed to mount {} with args [{}]", self.display(), args))?;
Ok(())
}
fn bind_mount<P: AsRef<Path>>(&self, target: P) -> Result<()> {
let target = target.as_ref().to_str().unwrap();
exec_command("/usr/bin/mount", &["--bind", self.pathstr(), target])
.context(format!("failed to bind mount {} to {}", self.display(), target))?;
Ok(())
}
fn setup_loop(&self, offset: Option<usize>, sizelimit: Option<usize>) -> Result<PathBuf> {
let offset_str: String;
let sizelimit_str: String;
let mut v = Vec::new();
if let Some(val) = offset {
v.push("--offset");
offset_str = val.to_string();
v.push(&offset_str);
}
if let Some(val) = sizelimit {
v.push("--sizelimit");
sizelimit_str = val.to_string();
v.push(&sizelimit_str);
}
v.push("-f");
v.push(self.pathstr());
let output = exec_command_with_output("/sbin/losetup", &v)
.context(format!("failed to run /sbin/losetup on {}", self.display()))?;
Ok(PathBuf::from(output))
}
fn umount(&self) -> Result<()> {
exec_command("/usr/bin/umount", &[self.pathstr()])
.context(format!("failed to umount {}", self.display()))?;
Ok(())
}
fn partition_type_guid(&self) -> Result<String> {
let output = exec_command_with_output("/usr/bin/lsblk", &["-dno", "PARTTYPE", self.pathstr()])
.context(format!("failed to run lsblk on {}", self.display()))?;
Ok(output)
}
fn verity_initial_hashtree<P: AsRef<Path>>(&self, hashfile: P) -> Result<VerityOutput> {
let output = exec_command_with_output("/usr/sbin/veritysetup",
&["format", self.pathstr(), hashfile.as_ref().pathstr()])
.context("veritysetup format command failed")?;
Ok(VerityOutput::parse(&output))
}
fn verity_regenerate_hashtree(&self, offset: usize, nblocks: usize, salt: &str) -> Result<VerityOutput> {
let arg_offset = format!("--hash-offset={}", offset);
let arg_blocks = format!("--data-blocks={}", nblocks);
let arg_salt = format!("--salt={}", salt);
let arg_path = self.pathstr();
let output = exec_command_with_output("/usr/sbin/veritysetup",
&[arg_offset.as_str(), arg_blocks.as_str(), arg_salt.as_str(),
"format", arg_path, arg_path])
.context("running veritysetup command failed")?;
Ok(VerityOutput::parse(&output))
}
fn verity_setup(&self, offset: usize, nblocks: usize, roothash: &str, devname: &str) -> Result<()> {
let arg_offset = format!("--hash-offset={}", offset);
let arg_blocks = format!("--data-blocks={}", nblocks);
let arg_path = self.pathstr();
exec_command("/usr/sbin/veritysetup",
&[arg_offset.as_str(), arg_blocks.as_str(), "create",
devname, arg_path, arg_path, roothash])
.context("running veritysetup failed")?;
Ok(())
}
fn pathstr(&self) -> &str {
self.to_str().unwrap()
}
}
/*
fn exec_command(cmd_path: &str, args: &[&str]) -> bool {
Command::new(cmd_path)
.args(args)
.stderr(Stdio::inherit())
.status()
.expect(&format!("unable to execute {}", cmd_path))
.success()
}
fn exec_command_with_output(cmd_path: &str, args: &[&str]) -> (bool, String) {
let res = Command::new(cmd_path)
.args(args)
.stderr(Stdio::inherit())
.output()
.expect(&format!("unable to execute {}", cmd_path));
if res.status.success() {
(true, String::from_utf8(res.stdout).unwrap().trim().to_owned())
} else {
(false, String::new())
}
}
*/
fn exec_command(cmd_path: &str, args: &[&str]) -> Result<()> {
let status = Command::new(cmd_path)
.args(args)
.stderr(Stdio::inherit())
.status()
.context(format!("unable to execute {}", cmd_path))?;
if !status.success() {
match status.code() {
Some(code) => bail!("command {} failed with exit code: {}", cmd_path, code),
None => bail!("command {} failed with no exit code", cmd_path),
}
}
Ok(())
}
fn exec_command_with_output(cmd_path: &str, args: &[&str]) -> Result<String> {
let res = Command::new(cmd_path)
.args(args)
.stderr(Stdio::inherit())
.output()
.context(format!("unable to execute {}", cmd_path))?;
if !res.status.success() {
match res.status.code() {
Some(code) => bail!("command {} failed with exit code: {}", cmd_path, code),
None => bail!("command {} failed with no exit code", cmd_path),
}
}
Ok(String::from_utf8(res.stdout).unwrap().trim().to_owned())
}
pub struct FileTypeResult(String);
impl FileTypeResult {
pub fn is_xz_compressed(&self) -> bool {
self.0.starts_with("XZ")
}
pub fn is_ext2_image(&self) -> bool {
self.0.starts_with("Linux rev 1.0 ext2 filesystem data")
}
pub fn output(&self) -> &str {
self.0.as_str()
}
}
/// The output from the `veritysetup format` command can be parsed as key/value
/// pairs. This class parses the output and stores it in a map for querying.
pub struct VerityOutput {
output: String,
map: HashMap<String,String>,
}
impl VerityOutput {
/// Parse the string `output` as standard output from the dm-verity
/// `veritysetup format` command.
fn parse(output: &str) -> VerityOutput {
let mut vo = VerityOutput {
output: output.to_owned(),
map: HashMap::new(),
};
for line in output.lines() {
vo.parse_line(line);
}
vo
}
fn parse_line(&mut self, line: &str) {
let v = line.split(':')
.map(|s| s.trim())
.collect::<Vec<_>>();
if v.len() == 2 {
self.map.insert(v[0].to_owned(), v[1].to_owned());
}
}
pub fn root_hash(&self) -> Option<&str> {
self.map.get("Root hash").map(|s| s.as_str())
}
pub fn salt(&self) -> Option<&str> {
self.map.get("Salt").map(|s| s.as_str())
}
pub fn output(&self) -> &str {
&self.output
}
}

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use std::path::{Path,PathBuf};
use std::fs::{self,File};
use std::io::{self,Read};
use disks::DiskPartition;
use Result;
use CommandLine;
use PathExt;
use ImageHeader;
use Config;
use MetaInfo;
const STORAGE_BASEDIR: &str = "/sysroot/storage/resources";
const BOOT_BASEDIR: &str = "/boot/images";
const RUN_DIRECTORY: &str = "/run/images";
/// Locates and mounts a resource image file.
///
/// Resource image files are files containing a disk image that can be
/// loop mounted, optionally secured with dm-verity. The root directory
/// of the mounted image may contain a file called `manifest` which
/// contains a list of bind mounts to perform from the mounted tree to
/// the system rootfs.
///
/// dm-verity will be set up for the mounted image unless the `citadel.noverity`
/// variable is set on the kernel command line.
///
/// Resource image files will first be searched for in the `/storage/resources/`
/// directory (with `/sysroot` prepended since these mounts are performed in initramfs).
/// If the storage device does not exist or kernel command line variables are set
/// indicating either an install mode or recovery mode boot then search of storage
/// directory is not performed.
///
/// If not located in `/storage/resources` the image file will be searched for on all
/// UEFI ESP partitions on the system. If found on a boot partition, it will be
/// copied to `/run/images` and uncompressed if necessary.
///
pub struct ResourceImage {
name: String,
path: PathBuf,
}
impl ResourceImage {
/// Locate and return a resource image with `name`.
/// First the /storage/resources directory is searched, and if not found there,
/// each EFI boot partition will also be searched.
pub fn find(name: &str) -> Result<ResourceImage> {
let mut img = ResourceImage::new(name);
let search_storage = !(CommandLine::install_mode() || CommandLine::recovery_mode());
if search_storage && ResourceImage::ensure_storage_mounted() {
let path = PathBuf::from(format!("{}/{}.img", STORAGE_BASEDIR, name));
if path.exists() {
img.path.push(path);
info!("Image found at {}", img.path.display());
return Ok(img)
}
}
if img.search_boot_partitions() {
Ok(img)
} else {
Err(format_err!("Failed to find resource image: {}", name))
}
}
/// Locate and return a rootfs resource image.
/// Only EFI boot partitions will be searched.
pub fn find_rootfs() -> Result<ResourceImage> {
let mut img = ResourceImage::new("citadel-rootfs");
if img.search_boot_partitions() {
info!("Found rootfs image at {}", img.path.display());
Ok(img)
} else {
Err(format_err!("Failed to find rootfs resource image"))
}
}
/// Return path to the resource image file.
pub fn path(&self) -> &Path {
&self.path
}
fn new(name: &str) -> ResourceImage {
ResourceImage {
name: name.to_owned(),
path: PathBuf::new(),
}
}
pub fn mount(&mut self, config: &Config) -> Result<()> {
if CommandLine::noverity() {
self.mount_noverity()?;
} else {
self.mount_verity(config)?;
}
self.process_manifest_file()
}
fn mount_verity(&self, config: &Config) -> Result<()> {
let hdr = ImageHeader::from_file(&self.path)?;
let metainfo = hdr.verified_metainfo(config)?;
info!("Setting up dm-verity device for image");
if !hdr.has_flag(ImageHeader::FLAG_HASH_TREE) {
self.generate_verity_hashtree(&hdr, &metainfo)?;
}
let devname = format!("verity-{}", self.name);
self.path.verity_setup(ImageHeader::HEADER_SIZE, metainfo.nblocks(), metainfo.verity_root(), &devname)?;
info!("Mounting dm-verity device to {}", self.mount_path().display());
fs::create_dir_all(self.mount_path())?;
Path::new(&format!("/dev/mapper/{}", devname)).mount(self.mount_path())
}
pub fn generate_verity_hashtree(&self, hdr: &ImageHeader, metainfo: &MetaInfo) -> Result<()> {
info!("Generating dm-verity hash tree for image");
if !hdr.has_flag(ImageHeader::FLAG_HASH_TREE) {
let _ = self.path.verity_regenerate_hashtree(ImageHeader::HEADER_SIZE, metainfo.nblocks(), metainfo.verity_salt())?;
hdr.set_flag(ImageHeader::FLAG_HASH_TREE);
let w = fs::OpenOptions::new().write(true).open(&self.path)?;
hdr.write_header(w)?;
}
Ok(())
}
// Mount the resource image but use a simple loop mount rather than setting up a dm-verity
// device for the image.
fn mount_noverity(&self) -> Result<()> {
info!("loop mounting image to {} (noverity)", self.mount_path().display());
fs::create_dir_all(self.mount_path())?;
Path::new(&self.path).mount_with_args(self.mount_path(), "-oloop,ro,offset=4096")
}
// Copy resource image from /boot partition to /run/images and uncompress
// with xz if it is a compressed file. Update `self.path` to refer to the
// copy rather than the source file.
fn copy_to_run(&mut self) -> bool {
if let Err(err) = fs::create_dir_all(RUN_DIRECTORY) {
warn!("Error creating {} directory: {}", RUN_DIRECTORY, err);
return false;
}
let mut new_path = PathBuf::from(RUN_DIRECTORY);
new_path.set_file_name(self.path.file_name().unwrap());
if let Err(err) = fs::copy(&self.path, &new_path) {
warn!("Error copying {} to {}: {}", self.path.display(), new_path.display(), err);
return false;
}
if new_path.extension().unwrap() == "xz" {
if let Err(err) = new_path.xz_uncompress() {
warn!("Error uncompressing {}: {}", new_path.display(), err);
return false;
}
let stem = new_path.file_stem().unwrap().to_owned();
new_path.set_file_name(stem);
}
self.path.push(new_path);
if let Err(err) = self.maybe_decompress_image() {
warn!("Error decompressing image: {}", err);
return false;
}
true
}
fn maybe_decompress_image(&self) -> Result<()> {
let mut image = File::open(&self.path)?;
let hdr = ImageHeader::from_reader(&mut image)?;
if !hdr.has_flag(ImageHeader::FLAG_DATA_COMPRESSED) {
return Ok(())
}
info!("Decompressing internal image data");
let mut tempfile = self.write_compressed_tempfile(&mut image)?;
tempfile.xz_uncompress()?;
tempfile.set_extension("");
self.write_uncompressed_image(&hdr, &tempfile)?;
Ok(())
}
fn write_compressed_tempfile<R: Read>(&self, reader: &mut R) -> Result<PathBuf> {
let mut tmp_path = Path::new(RUN_DIRECTORY).join(format!("{}-tmp", self.name));
tmp_path.set_extension("xz");
let mut tmp_out = File::create(&tmp_path)?;
io::copy(reader, &mut tmp_out)?;
Ok(tmp_path)
}
fn write_uncompressed_image(&self, hdr: &ImageHeader, tempfile: &Path) -> Result<()> {
let mut image_out = File::create(&self.path)?;
hdr.clear_flag(ImageHeader::FLAG_DATA_COMPRESSED);
hdr.write_header(&mut image_out)?;
let mut tmp_in = File::open(&tempfile)?;
io::copy(&mut tmp_in, &mut image_out)?;
fs::remove_file(tempfile)?;
Ok(())
}
// Search for resource image file on any currently mounted /boot
// as well as on every UEFI ESP partition on the system.
//
// Return `true` if found
fn search_boot_partitions(&mut self) -> bool {
// Is /boot already mounted?
if Path::new("/boot").is_mounted() {
if self.search_current_boot_partition() && self.copy_to_run() {
info!("Image found on currently mounted boot partition and copied to {}", self.path.display());
return true;
}
let _ = Path::new("/boot").umount();
}
let partitions = match DiskPartition::boot_partitions() {
Ok(ps) => ps,
Err(e) => {
warn!("Error reading disk partition information: {}", e);
return false;
},
};
for part in partitions {
if part.mount("/boot") {
if self.search_current_boot_partition() && self.copy_to_run() {
part.umount();
info!("Image found on boot partition {} and copied to {}", part.path().display(), self.path.display());
return true;
}
part.umount();
}
}
false
}
// Search for resource file on currently mounted /boot partition
// with both .img and .img.xz extensions.
// Return `true` if found.
fn search_current_boot_partition(&mut self) -> bool {
let mut path = PathBuf::from(BOOT_BASEDIR);
for ext in ["img", "img.xz"].iter() {
path.set_file_name(format!("{}.{}", self.name, ext));
if path.exists() {
self.path.push(path);
return true;
}
}
false
}
// Return the path at which to mount this resource image.
fn mount_path(&self) -> PathBuf {
PathBuf::from(format!("{}/{}.mountpoint", RUN_DIRECTORY, self.name))
}
// Read and process a manifest file in the root directory of a mounted resource image.
fn process_manifest_file(&self) -> Result<()> {
info!("Processing manifest file for {}", self.path.display());
let manifest = self.mount_path().join("manifest");
if !manifest.exists() {
warn!("No manifest file found for resource image: {}", self.path.display());
} else {
for line in manifest.read_as_lines()? {
if let Err(e) = self.process_manifest_line(&line) {
warn!("Processing manifest file for resource image ({}): {}", self.path.display(), e);
}
}
}
Ok(())
}
// Process a single line from the resource image manifest file.
// Each line describes a bind mount from the resource image root to the system root fs.
// The line may contain either a single path or a pair of source and target paths separated by the colon (':') character.
// If no colon character is present then the source and target paths are the same.
// The source path from the mounted resource image will be bind mounted to the target path on the system rootfs.
fn process_manifest_line(&self, line: &str) -> Result<()> {
let line = line.trim_left_matches('/');
let (path_from, path_to) = if line.contains(":") {
let v = line.split(":").collect::<Vec<_>>();
if v.len() != 2 {
bail!("badly formed line '{}'", line);
}
(v[0], v[1].trim_left_matches('/'))
} else {
(line, line)
};
let from = self.mount_path().join(path_from);
let to = Path::new("/sysroot").join(path_to);
info!("Bind mounting {} to {} from manifest", from.display(), to.display());
from.bind_mount(&to)
}
// If the /storage directory is not mounted, attempt to mount it.
// Return true if already mounted or if the attempt to mount it succeeds.
fn ensure_storage_mounted() -> bool {
if Path::new("/sysroot/storage").is_mounted() {
return true
}
let path = Path::new("/dev/mapper/citadel-storage");
if !path.exists() {
return false
}
info!("Mounting /sysroot/storage directory");
const MOUNT_ARGS: &str = "-odefaults,nossd,noatime,commit=120";
match path.mount_with_args("/sysroot/storage", MOUNT_ARGS) {
Err(e) => {
warn!("failed to mount /sysroot/storage: {}", e);
false
},
Ok(()) => true,
}
}
}