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use firehazard::*;
use std::collections::*;
use std::path::PathBuf;
pub struct Token {
pub integrity: sid::integrity::Level,
pub privileges: HashSet<privilege::Luid>,
pub enabled: Vec<sid::Ptr<'static>>,
pub restricted: Option<Vec<sid::Ptr<'static>>>,
}
impl Default for Token {
fn default() -> Self {
Self {
integrity: Default::default(),
privileges: Default::default(),
enabled: Default::default(),
restricted: Some(vec![sid!(S-1-0-0)]),
}
}
}
pub struct Allow {
pub same_desktop: bool,
pub dynamic_code: bool,
pub missing_cet: bool,
}
impl Default for Allow {
fn default() -> Self {
Self {
same_desktop: false,
dynamic_code: false,
missing_cet: ! cfg!(cet),
}
}
}
pub struct Target {
pub exe: PathBuf,
pub allow: Allow,
pub spawn: Token, // Used to initialize non-delayed DLLs, pre-main code
pub lockdown: Token, // Eventual lockdown settings
}
impl Target {
#[allow(unused_variables)]
pub fn list() -> impl Iterator<Item = Self> {
let sandbox_process_token = open_process_token(get_current_process(), token::ALL_ACCESS).unwrap();
let all = Box::leak(Box::new(sandbox_process_token.groups_and_privileges().unwrap())).sids().iter().map(|s| s.sid).collect::<Vec<_>>();
let user = Box::leak(Box::new(sandbox_process_token.user().unwrap())).user().sid;
let session = Box::leak(Box::new(sandbox_process_token.logon_sid().unwrap())).groups().iter().next().unwrap().sid;
let users = sid!(S-1-5-32-545);
let everyone = sid!(S-1-1-0);
let null = sid!(S-1-0-0);
let self_exe = std::path::PathBuf::from(std::env::args_os().next().expect("args[0] / exe"));
let dir = self_exe.parent().unwrap();
let manifest_dir = dir.ancestors().nth(2).unwrap(); // target/debug
let build = if cfg!(debug_assertions) { "debug" } else { "release" };
let arch = "x86_64-pc-windows-msvc"; // XXX
let se_change_notify_privilege = privilege::name::CHANGE_NOTIFY.luid();
let mut targets = vec![
Target {
exe: manifest_dir.join(format!(r"crates\no-std\target\{build}\trivial.exe")),
allow: Allow{
missing_cet: true, // no-std doesn't have my fancy build.rs script enabling cet builds
.. Default::default()
},
spawn: Token {
// Minimal permissions to access e.g. `/KnownDlls` / `kernel32.dll` for init
privileges: [se_change_notify_privilege].into_iter().collect(),
enabled: vec![everyone],
restricted: Some(vec![everyone]),
.. Default::default()
},
lockdown: Token {
.. Default::default()
},
},
Target {
exe: manifest_dir.join(format!(r"crates\no-std\target\{arch}\{build}\trivial.exe")),
allow: Allow{
missing_cet: true, // no-std doesn't have my fancy build.rs script enabling cet builds
.. Default::default()
},
spawn: Token {
// Minimal permissions to access e.g. `/KnownDlls` / `kernel32.dll` for init
privileges: [se_change_notify_privilege].into_iter().collect(),
enabled: vec![everyone],
restricted: Some(vec![everyone]),
.. Default::default()
},
lockdown: Token {
.. Default::default()
},
},
Target {
exe: dir.join("less_trivial.exe"),
allow: Allow::default(),
spawn: Token {
integrity: sid::integrity::Low,
privileges: [se_change_notify_privilege].into_iter().collect(), // DLL access
enabled: vec![user, users, everyone, session],
restricted: Some(vec![user, users, everyone, session]),
.. Default::default()
},
lockdown: Token {
// `BCryptGenRandom` is unreliable unless the process token has `user` or `session` available.
// Specifically, the second call to it can fail with GetLastError()==ERROR_ACCESS_DENIED, even with
// identical params - due to `RegisterReopenWait` / `ReopenSystemPreferredRngCallback` failing.
// ```
// thread 'main' panicked at 'couldn't generate random bytes with preferred RNG: Os { code: 5, kind: PermissionDenied, message: "Access is denied." }'
// ```
// In rust 1.61.0, this is kinda fine, since `std::sys::windows::rand::hashmap_random_keys` only calls it once... per thread, which is less fine.
// In rust 1.63.0, this is broken, since `hashmap_random_keys` calls it once to check if it should use it, then again to actually use it.
// In rust ~nightly, this is fine, since `RtlGenRandom` will be used as a fallback whenever it fails thanks to this simplification PR:
// <https://github.com/rust-lang/rust/commit/46673bb08ffa22f21287349d966d875038e41b37>
// <https://github.com/rust-lang/rust/blob/1.61.0/library/std/src/sys/windows/rand.rs#L18>
// <https://github.com/rust-lang/rust/blob/1.63.0/library/std/src/sys/windows/rand.rs#L16>
// <https://github.com/rust-lang/rust/blob/2fbc08e2ce64dee45a29cb6133da6b32366268aa/library/std/src/sys/windows/rand.rs#L16>
enabled: vec![session],
restricted: Some(vec![session]),
.. Default::default()
},
},
Target {
exe: dir.join("run-wasmer.exe"),
allow: Allow {
dynamic_code: true,
missing_cet: true, // `wasm` doesn't have my fancy build.rs script enabling cet builds
.. Allow::default()
},
spawn: Token {
integrity: sid::integrity::Low,
privileges: [se_change_notify_privilege].into_iter().collect(), // DLL access
enabled: vec![user, users, everyone, session],
restricted: Some(vec![user, users, everyone, session]),
.. Default::default()
},
lockdown: Token {
enabled: vec![session],
restricted: Some(vec![session]),
.. Default::default()
},
},
Target {
exe: dir.join("run-wasmtime.exe"),
allow: Allow {
dynamic_code: true,
missing_cet: true, // `wasm` doesn't have my fancy build.rs script enabling cet builds
.. Allow::default()
},
spawn: Token {
integrity: sid::integrity::Low,
privileges: [se_change_notify_privilege].into_iter().collect(), // DLL access
enabled: vec![user, users, everyone, session],
restricted: Some(vec![user, users, everyone, session]),
.. Default::default()
},
lockdown: Token {
enabled: vec![session],
restricted: Some(vec![session]),
.. Default::default()
},
},
Target {
exe: dir.join("ui_basic_window.exe"),
allow: Allow {
same_desktop: true,
.. Allow::default()
},
spawn: Token {
integrity: sid::integrity::Low,
privileges: [se_change_notify_privilege].into_iter().collect(), // DLL access
enabled: vec![user, users, everyone, session],
restricted: Some(vec![user, users, everyone, session]),
.. Default::default()
},
lockdown: Token {
enabled: vec![session],
restricted: Some(vec![session]),
.. Default::default()
},
},
];
targets.retain(|t| t.exe.exists() || !t.exe.ends_with("trivial.exe"));
targets.into_iter()
}
}