simtest: sealed values

A value sealed for its declared readers goes everywhere; one sealed
for a stranger too, or plain, gets nothing past the others.

Auth plan M8.

1 files changed, 81 insertions, 1 deletions

diff --git a/src/simtest/policy.rs b/src/simtest/policy.rs
index 60a9f6b..b6be095 100644
--- a/src/simtest/policy.rs
+++ b/src/simtest/policy.rs
@@ -3,7 +3,8 @@
 //! node registers, a write a node lets through for a user the registry doesn't have
 //! stays where it was made, and a remake carries the swarm over without refusing
 //! anything. A strict one (`"values": "signed"`) takes the values its users sign, and
-//! nothing else there.
+//! nothing else there; one declaring values sealed, only those sealed for their
+//! readers.
 
 use std::time::Duration;
 
@@ -315,3 +316,82 @@ async fn a_strict_swarm() {
         assert_eq!(plain(node, "config").await, Some(json!({"mode": "slow"})));
     }
 }
+
+/// A swarm declaring values sealed (`access::sealed`), with the policy: a value sealed
+/// for its declared readers goes everywhere; one a node writes plain there, or sealed
+/// for a stranger too, gets nothing past the others.
+#[tokio::test(flavor = "multi_thread", worker_threads = 4)]
+async fn sealed_values() {
+    use crate::access::sealed::testing::sealed_for;
+    use crate::access::sshsig::PublicKey;
+    let alice_key = PublicKey([21; 32]);
+    let line = alice_key.line();
+    let sim = Sim::with_identity(74);
+    let a = sim.start_with("a", &[], Start::Genesis, move |config| {
+        config.first_users = [(
+            "alice".to_owned(),
+            [("laptop".to_owned(), line.clone())].into(),
+        )]
+        .into();
+    });
+    let b = sim.start("b", &["a"], Start::Join);
+    let c = sim.start("c", &["a"], Start::Join);
+    sim.wait_ready(&[&a, &b, &c], SOON).await;
+    let nodes = [a.clone(), b.clone(), c.clone()];
+    sim.wait_until("every node is registered", SOON, || {
+        let nodes = nodes.clone();
+        async move {
+            for node in &nodes {
+                if crate::swarm::members::members(&node.doc.read().await.doc).len() < 3 {
+                    return false;
+                }
+            }
+            true
+        }
+    })
+    .await;
+    write_as(
+        &a,
+        "alice",
+        "_continuum/access/sealed",
+        json!([{"path": ["secrets", "*"], "readers": ["alice"]}]),
+    )
+    .await;
+    write_as(
+        &a,
+        "alice",
+        "_continuum/access/policy",
+        json!({"version": 1}),
+    )
+    .await;
+    sim.wait_converged(&[&a, &b, &c], SOON).await;
+
+    // Sealed for alice, written on b: everywhere.
+    let sealed = sealed_for(&[alice_key]);
+    write_as(&b, "alice", "secrets/db", json!(sealed.clone())).await;
+    for node in [&a, &b, &c] {
+        let sealed = sealed.clone();
+        sim.wait_until("the sealed value is everywhere", SOON, move || {
+            let sealed = sealed.clone();
+            async move { plain(node, "secrets/db").await == Some(json!(sealed)) }
+        })
+        .await;
+        assert_eq!(refused(node).await, 0, "an honest change was refused");
+    }
+
+    // c writes one sealed for a stranger too: refused by the others, and so is what it
+    // builds on it.
+    let stray = sealed_for(&[alice_key, PublicKey([22; 32])]);
+    write_as(&c, "alice", "secrets/web", json!(stray)).await;
+    write_as(&c, "alice", "secrets/api", json!("hunter2")).await;
+    for node in [&a, &b] {
+        sim.wait_until(
+            "the badly sealed writes are refused",
+            SOON,
+            move || async move { refused(node).await > 0 },
+        )
+        .await;
+        assert!(!holds(node, "secrets/web").await);
+        assert!(!holds(node, "secrets/api").await);
+    }
+}