298 lines
11 KiB
Rust
298 lines
11 KiB
Rust
use std::collections::BTreeMap;
|
|
use std::ffi::OsString;
|
|
use std::fs;
|
|
use std::io;
|
|
use std::os::unix::ffi::OsStrExt;
|
|
use std::os::unix::fs::MetadataExt;
|
|
use std::path::{Path, PathBuf};
|
|
use std::process::ExitCode;
|
|
use std::sync::atomic::{AtomicU64, Ordering};
|
|
|
|
use lazaret_core::configuration::{
|
|
ConfigurationLoadRequest, SandboxLayoutV1, load_trusted_configuration,
|
|
};
|
|
use lazaret_core::identity::{CoordinatorId, DomainId, GenerationId};
|
|
use lazaret_core::records::{
|
|
ArtifactState, HostProcessOwnershipSlot, PreparedArtifact, ProcessOwnershipCommitAck,
|
|
};
|
|
use lazaret_linux::process::{
|
|
ProcessOwnershipContext, current_process_identity, dispatch_private_process_role,
|
|
};
|
|
use lazaret_state_anchor::{
|
|
FuseOverlayfsMount, ProtectedRuntimeFiles, RuntimeStateAnchorAuthority, StateAnchorAcquisition,
|
|
StateAnchorLaunchAuthority, StateAnchorLayout, StateAnchorSandboxView,
|
|
unmount_after_coordinator_loss,
|
|
};
|
|
use rustix::process::Signal;
|
|
|
|
static SEQUENCE: AtomicU64 = AtomicU64::new(0);
|
|
|
|
fn main() -> ExitCode {
|
|
let arguments = std::env::args_os().skip(1).collect::<Vec<_>>();
|
|
if let Some(result) = dispatch_private_process_role(&arguments) {
|
|
return exit(result);
|
|
}
|
|
exit(run())
|
|
}
|
|
|
|
fn exit(result: io::Result<()>) -> ExitCode {
|
|
match result {
|
|
Ok(()) => ExitCode::SUCCESS,
|
|
Err(error) => {
|
|
eprintln!("State Anchor lifecycle fixture failed: {error}");
|
|
ExitCode::FAILURE
|
|
}
|
|
}
|
|
}
|
|
|
|
#[allow(clippy::too_many_lines)]
|
|
fn run() -> io::Result<()> {
|
|
match fs::metadata("/dev/fuse") {
|
|
Ok(_) => {}
|
|
Err(error) if error.kind() == io::ErrorKind::NotFound => {
|
|
eprintln!("skipped: /dev/fuse is unavailable");
|
|
return Ok(());
|
|
}
|
|
Err(error) => return Err(error),
|
|
}
|
|
let tree = TestTree::new()?;
|
|
let configuration = configuration(&tree)?;
|
|
let lower = tree.path.join("prepared-lower");
|
|
fs::create_dir_all(lower.join("usr/bin"))?;
|
|
fs::create_dir_all(lower.join("etc"))?;
|
|
fs::write(lower.join("usr/bin/base-tool"), b"base")?;
|
|
for name in ["resolv.conf", "hosts", "hostname"] {
|
|
fs::write(lower.join("etc").join(name), b"image")?;
|
|
}
|
|
let metadata = lower.metadata()?;
|
|
let artifact = PreparedArtifact {
|
|
prepared_artifact_id: lazaret_core::identity::PreparedArtifactId::new([8; 32]),
|
|
source_identity: lazaret_core::identity::SourceIdentity::new(b"fixture".to_vec()),
|
|
selected_manifest_digest: lazaret_core::identity::SelectedManifestDigest::new([9; 32]),
|
|
policy_id: lazaret_core::identity::PolicyId::new([10; 32]),
|
|
id_map_digest: lazaret_core::identity::IdMapDigest::new([11; 32]),
|
|
path: lazaret_core::identity::HostPath::new(lower.as_os_str().as_encoded_bytes().to_vec()),
|
|
device: lazaret_core::identity::DeviceId::new(metadata.dev()),
|
|
inode: lazaret_core::identity::InodeId::new(metadata.ino()),
|
|
state: ArtifactState::Available,
|
|
};
|
|
let layout = StateAnchorLayout::create(&configuration).map_err(io::Error::other)?;
|
|
|
|
let launch =
|
|
StateAnchorLaunchAuthority::capture(&layout, &artifact).map_err(io::Error::other)?;
|
|
let runtime_authority = RuntimeStateAnchorAuthority::from_inherited(
|
|
launch.lower_fd(),
|
|
launch.persistent_anchor_fd(),
|
|
launch.runtime_anchor_fd(),
|
|
launch.expected_lower(),
|
|
)
|
|
.map_err(io::Error::other)?;
|
|
let expected = std::cell::Cell::new(None);
|
|
let runtime_mount = runtime_authority
|
|
.acquire(
|
|
current_process_identity()?,
|
|
ProcessOwnershipContext {
|
|
domain_id: DomainId::new([1; 32]),
|
|
generation_id: GenerationId::new(1),
|
|
coordinator_id: CoordinatorId::new([3; 32]),
|
|
slot: HostProcessOwnershipSlot::StateAnchorDaemon,
|
|
},
|
|
|staged| {
|
|
expected.set(Some(staged));
|
|
Ok(())
|
|
},
|
|
|staged| Ok(ProcessOwnershipCommitAck::v1(staged)),
|
|
|readiness| {
|
|
if expected.get() != Some(readiness.staged())
|
|
|| lazaret_linux::filesystem::current_mount_identity(layout.merged())?
|
|
!= readiness.mount()
|
|
{
|
|
return Err(io::Error::other(
|
|
"inherited State Anchor readiness changed authority",
|
|
));
|
|
}
|
|
Ok(())
|
|
},
|
|
)
|
|
.map_err(io::Error::other)?;
|
|
runtime_mount.unmount().map_err(io::Error::other)?;
|
|
|
|
let first = acquire(&layout, &artifact)?;
|
|
fs::write(
|
|
layout.merged().join("usr/bin/installed-tool"),
|
|
b"persistent",
|
|
)?;
|
|
fs::write(layout.merged().join("etc/developer.conf"), b"persistent")?;
|
|
if lower.join("usr/bin/installed-tool").exists()
|
|
|| lower.join("etc/developer.conf").exists()
|
|
|| !layout.upper().join("usr/bin/installed-tool").exists()
|
|
|| !layout.upper().join("etc/developer.conf").exists()
|
|
{
|
|
return Err(io::Error::other(
|
|
"writes did not remain upper-only over the read-only lower",
|
|
));
|
|
}
|
|
let view = StateAnchorSandboxView::from_mounted(&layout, &artifact, first.mount_identity())
|
|
.map_err(io::Error::other)?;
|
|
view.revalidate().map_err(io::Error::other)?;
|
|
layout
|
|
.replace_protected_runtime_files(&ProtectedRuntimeFiles {
|
|
resolv_conf: b"nameserver 192.0.2.53\n",
|
|
hosts: b"127.0.0.1 localhost\n",
|
|
hostname: b"lazaret\n",
|
|
})
|
|
.map_err(io::Error::other)?;
|
|
let runtime_sources = view.protected_runtime_mounts().collect::<Vec<_>>();
|
|
if runtime_sources.len() != 3
|
|
|| runtime_sources
|
|
.iter()
|
|
.any(|(source, _)| source.starts_with(&lower) || source.starts_with(layout.upper()))
|
|
{
|
|
return Err(io::Error::other(
|
|
"protected runtime files are not host-private runtime material",
|
|
));
|
|
}
|
|
if lower.join("etc/resolv.conf").read_link().is_ok()
|
|
|| fs::read(lower.join("etc/resolv.conf"))? != b"image"
|
|
|| layout.upper().join("etc/resolv.conf").exists()
|
|
|| fs::read(&runtime_sources[0].0)? != b"nameserver 192.0.2.53\n"
|
|
{
|
|
return Err(io::Error::other(
|
|
"runtime-file replacement escaped transient storage",
|
|
));
|
|
}
|
|
drop(view);
|
|
let wrong = lazaret_linux::filesystem::current_mount_identity(layout.upper())?;
|
|
if unmount_after_coordinator_loss(&layout, wrong).is_ok() {
|
|
return Err(io::Error::other(
|
|
"ownership mismatch unmounted foreign identity",
|
|
));
|
|
}
|
|
first.unmount().map_err(io::Error::other)?;
|
|
|
|
let second = acquire(&layout, &artifact)?;
|
|
if fs::read(layout.merged().join("usr/bin/installed-tool"))? != b"persistent"
|
|
|| fs::read(layout.merged().join("etc/developer.conf"))? != b"persistent"
|
|
{
|
|
return Err(io::Error::other(
|
|
"upper state did not persist across remount",
|
|
));
|
|
}
|
|
let identity = second.mount_identity();
|
|
second.process().send_signal(Signal::KILL)?;
|
|
while !second.process().has_exited()? {
|
|
std::thread::yield_now();
|
|
}
|
|
unmount_after_coordinator_loss(&layout, identity).map_err(io::Error::other)?;
|
|
second
|
|
.finish_after_external_unmount()
|
|
.map_err(io::Error::other)?;
|
|
drop(tree);
|
|
Ok(())
|
|
}
|
|
|
|
fn acquire<'layout, 'configuration>(
|
|
layout: &'layout StateAnchorLayout<'configuration>,
|
|
artifact: &PreparedArtifact,
|
|
) -> io::Result<FuseOverlayfsMount<'layout, 'configuration>> {
|
|
let expected = std::cell::Cell::new(None);
|
|
FuseOverlayfsMount::acquire(
|
|
layout,
|
|
StateAnchorAcquisition {
|
|
lower: Path::new(std::ffi::OsStr::from_bytes(artifact.path.as_bytes())),
|
|
expected_lower: (artifact.device.get(), artifact.inode.get()),
|
|
expected_parent: current_process_identity()?,
|
|
ownership: ProcessOwnershipContext {
|
|
domain_id: DomainId::new([1; 32]),
|
|
generation_id: GenerationId::new(2),
|
|
coordinator_id: CoordinatorId::new([3; 32]),
|
|
slot: HostProcessOwnershipSlot::StateAnchorDaemon,
|
|
},
|
|
},
|
|
|staged| {
|
|
expected.set(Some(staged));
|
|
Ok(())
|
|
},
|
|
|staged| {
|
|
if expected.get() != Some(staged) {
|
|
return Err(io::Error::other("staged process identity changed"));
|
|
}
|
|
Ok(ProcessOwnershipCommitAck::v1(staged))
|
|
},
|
|
|readiness| {
|
|
if expected.get() != Some(readiness.staged()) {
|
|
return Err(io::Error::other("ready process identity changed"));
|
|
}
|
|
if lazaret_linux::filesystem::current_mount_identity(layout.merged())?
|
|
!= readiness.mount()
|
|
{
|
|
return Err(io::Error::other(
|
|
"readiness preceded exact mount verification",
|
|
));
|
|
}
|
|
Ok(())
|
|
},
|
|
)
|
|
.map_err(io::Error::other)
|
|
}
|
|
|
|
struct TestTree {
|
|
path: PathBuf,
|
|
}
|
|
|
|
impl TestTree {
|
|
fn new() -> io::Result<Self> {
|
|
let path = std::env::temp_dir().join(format!(
|
|
"lazaret state-anchor,:{}-{}",
|
|
std::process::id(),
|
|
SEQUENCE.fetch_add(1, Ordering::Relaxed)
|
|
));
|
|
fs::create_dir(&path)?;
|
|
Ok(Self { path })
|
|
}
|
|
}
|
|
|
|
impl Drop for TestTree {
|
|
fn drop(&mut self) {
|
|
let _ = fs::remove_dir_all(&self.path);
|
|
}
|
|
}
|
|
|
|
fn configuration(
|
|
tree: &TestTree,
|
|
) -> io::Result<lazaret_core::configuration::ResolvedDomainConfiguration> {
|
|
let configuration_directory = tree.path.join("configuration");
|
|
let workspace = tree.path.join("workspace");
|
|
let runtime = tree.path.join("runtime");
|
|
fs::create_dir(&configuration_directory)?;
|
|
fs::create_dir(&workspace)?;
|
|
fs::create_dir(&runtime)?;
|
|
let configuration_path = configuration_directory.join("lazaret.toml");
|
|
fs::write(
|
|
&configuration_path,
|
|
format!(
|
|
"schema = \"lazaret-trusted-host-config-v1\"\n[storage]\ndata_root = \"{}\"\n[network]\ndefault_allow = [\"192.0.2.10/32\"]\n[profiles.default]\nimage = \"example.invalid/fixture:v1\"\npersistent_dirs = [\"/usr\", \"/etc\"]\n[profiles.default.readiness]\ndenied = [{{ address = \"10.20.30.40\", port = 443 }}]\npermitted = [{{ address = \"192.0.2.10\", port = 443 }}]\ndns = [{{ resolver = \"198.51.100.53\", query = \"example.invalid\" }}]\n",
|
|
tree.path.join("data").display()
|
|
),
|
|
)?;
|
|
let layout = SandboxLayoutV1::from_production_layout([
|
|
"/workspace".to_owned(),
|
|
"/proc".to_owned(),
|
|
"/sys".to_owned(),
|
|
"/dev".to_owned(),
|
|
"/run/lazaret".to_owned(),
|
|
])
|
|
.map_err(io::Error::other)?;
|
|
load_trusted_configuration(ConfigurationLoadRequest {
|
|
explicit_configuration_path: Some(configuration_path),
|
|
selected_profile: "default".to_owned(),
|
|
workspace,
|
|
home: tree.path.join("home"),
|
|
xdg_config_home: None,
|
|
xdg_data_home: None,
|
|
xdg_runtime_dir: runtime,
|
|
environment: BTreeMap::<String, OsString>::new(),
|
|
sandbox_layout: layout,
|
|
})
|
|
.map_err(io::Error::other)
|
|
}
|