boxmaker/crates/brokerd/tests/policy_redecide.rs

//! Table tests for `policy::redecide`: an approval lets a call through only if the grants and
//! the session's state, as they are when it is approved, still say `ask` or `auto`. Do not edit.

#[path = "support/build.rs"]
mod build;

use brokerd::grants::GrantSet;
use brokerd::policy::{Ask, Label, Outcome, decide, redecide};
use build::{grant, now, private, read, secret, set};
use bxcore::{DataClass, DenyReason, Mode};

const PATH: &str = "/home/kyle/notes/a.md";

fn asking() -> build::Build {
    grant("asks", "read_file", Mode::Ask).paths(&["/home/kyle/notes"])
}

/// An `Ask` for `PATH`, decided under `asking()` alone at `private`.
fn pending() -> Ask {
    match decide(read(PATH), &set(vec![asking()]), private(), now()) {
        Outcome::Ask(ask) => ask,
        other => panic!("expected ask, got {other:?}"),
    }
}

#[test]
fn still_ask_lets_the_call_run_under_the_same_grant() {
    let decision = redecide(pending(), &set(vec![asking()]), private(), now()).unwrap();
    assert_eq!(decision.grant(), "asks");
    assert_eq!(decision.request(), &read(PATH));
    assert_eq!(decision.matched_path(), Some("/home/kyle/notes"));
    assert_eq!(
        decision.label(),
        Label {
            class: DataClass::Private,
            untrusted: true
        }
    );
}

#[test]
fn auto_now_lets_the_call_run_under_the_grant_that_matches_now() {
    // The owner has since replaced the ask grant with an auto grant of another name and label.
    let grants = set(vec![
        grant("now-auto", "read_file", Mode::Auto)
            .paths(&["/home/kyle"])
            .class(DataClass::Secret)
            .trusted(),
    ]);
    let decision = redecide(pending(), &grants, private(), now()).unwrap();
    assert_eq!(decision.grant(), "now-auto");
    assert_eq!(
        decision.grant_sha256(),
        bxcore::sha256(b"now-auto").unwrap()
    );
    assert_eq!(decision.matched_path(), Some("/home/kyle"));
    assert_eq!(decision.paths(), ["/home/kyle"]);
    assert_eq!(
        decision.label(),
        Label {
            class: DataClass::Secret,
            untrusted: false
        }
    );
}

#[test]
fn the_grant_file_was_removed() {
    let denial = redecide(pending(), &GrantSet::default(), private(), now()).unwrap_err();
    assert_eq!(denial.reason, DenyReason::NoGrant);
    assert_eq!(denial.grant, None);
}

#[test]
fn the_taint_rose_past_max_taint_while_the_approval_waited() {
    let narrow = || asking().max_taint(DataClass::Private);
    let ask = match decide(read(PATH), &set(vec![narrow()]), private(), now()) {
        Outcome::Ask(ask) => ask,
        other => panic!("expected ask, got {other:?}"),
    };
    let denial = redecide(ask, &set(vec![narrow()]), secret(), now()).unwrap_err();
    assert_eq!(denial.reason, DenyReason::TaintTooHigh);
}

#[test]
fn the_grant_expired_while_the_approval_waited() {
    let grants = set(vec![asking().expires("2026-09-18T12:10:00.000Z")]);
    let ask = match decide(read(PATH), &grants, private(), now()) {
        Outcome::Ask(ask) => ask,
        other => panic!("expected ask, got {other:?}"),
    };
    assert_eq!(ask.expires(), Some(build::ts("2026-09-18T12:10:00.000Z")));
    let later = build::ts("2026-09-18T12:10:00.000Z");
    let denial = redecide(ask, &grants, private(), later).unwrap_err();
    assert_eq!(denial.reason, DenyReason::GrantExpired);
}

#[test]
fn a_deny_grant_was_added_while_the_approval_waited() {
    let grants = set(vec![
        asking(),
        grant("no-notes", "read_file", Mode::Deny).paths(&["/home/kyle"]),
    ]);
    let denial = redecide(pending(), &grants, private(), now()).unwrap_err();
    assert_eq!(denial.reason, DenyReason::DeniedByGrant);
    assert_eq!(denial.grant.as_deref(), Some("no-notes"));
    assert_eq!(
        denial.grant_sha256,
        Some(bxcore::sha256(b"no-notes").unwrap())
    );
}

#[test]
fn the_grants_now_cover_other_arguments_only() {
    let grants = set(vec![
        grant("asks", "read_file", Mode::Ask).paths(&["/home/kyle/other"]),
    ]);
    let denial = redecide(pending(), &grants, private(), now()).unwrap_err();
    assert_eq!(denial.reason, DenyReason::NoGrant);
}