Add /wipe, /wipe-all, and threat model docs.

/wipe overwrites the message log and VACUUMs; identity and friends stay.
/wipe-all deletes the data dir after confirm so the next open is a new person.
Neither runs without a typed confirm screen.

README.md

@@ -1,14 +1,63 @@
 # OnionWire
 
-Lean Tor messenger: one Rust process (ratatui + E2EE + sqlite + in-process Arti).
+Lean Tor messenger: one Rust process (ratatui + Noise IK + sqlite + in-process Arti).
-Two people scan a QR, then chat. No hosted server.
+Two people scan a QR, then chat. No hosted server. Identity is a public key; the onion is only a locator.
 
-## Locked model
+## First run
 
-- **Identity = ed25519 public key.** Friends are `UNIQUE(pubkey)`.
+```
-- **Onion = locator only.** It can change. Never treat `.onion` as the roster key.
+cargo run --release
-- **F4 rotates the onion** (confirm by typing `ROTATE`). Same identity key. Offline friends need a QR rescan.
+```
-- **No XMPP, no Prosody, no s2s, no C-tor binary, no DHT, no outbox in v1.**
+
+Data lives in `ONIONWIRE_HOME` if set, otherwise `~/.local/share/onionwire/` (`onionwire.db` + Arti state, mode 0700). First open creates an ed25519 identity key. That key **is** you.
+
+Arti bootstraps Tor and publishes a v3 onion service. Onion services in Arti are still **experimental**. OnionWire fails closed if the HS cannot come up — it does not fall back to a `tor` binary or C-tor.
+
+## Friends are keys
+
+A friend is an ed25519 pubkey (`UNIQUE(pubkey)`). The `.onion` on that row is only where they are reachable right now. Re-scanning the same `k` updates the locator; it never creates a second person.
+
+## F2 QR
+
+`F2` shows a terminal QR and the payload:
+
+`onionwire:v1:k=…:o=…:spk=…:sig=…`
+
+`F3` pastes a payload. Unknown `k` asks for approval. Same `k` already in the roster updates `onion` only.
+
+## F4 rotate onion
+
+`F4` is a locator change, not a new identity. Confirm by typing `ROTATE` (Enter alone does nothing).
+
+- Your identity fingerprint stays the same.
+- A new onion is published; the old one is hard-cut (no dual-host grace).
+- Online friends get a signed `loc` frame.
+- Offline friends cannot find you until they rescan the new QR. There is no directory.
+
+## Fail closed
+
+If a peer’s onion is down, send fails. v1 has no outbox, no retry queue, no DHT, no name server.
+
+## Wipe
+
+Composer (bottom of the roster screen):
+
+- `/wipe` — confirm by typing `WIPE`. Overwrites the message log and `VACUUM`s. Identity key and friends stay.
+- `/wipe-all` — confirm by typing `WIPEALL`. Deletes the data dir. Next start is a **new person** (new identity key). Esc cancels. Nothing is wiped without confirm.
+
+## Seized laptop
+
+v1 stores **plaintext** on disk:
+
+- message log (sqlite `messages.plaintext`)
+- your identity secret key (`self.identity_sk`)
+- friend public keys and current locators
+
+Full-disk encryption plus `/wipe` / `/wipe-all` is the mitigation. There is no sqlcipher in v1.
+
+## Not in v1
+
+Prosody, XMPP, s2s, MAM, carbons, outbox, multi-device, DHT / name server, sqlcipher.
 
 Plan of record: `/home/lancelot/.hermes/plans/2026-09-10_004409-onionwire-lean.md`
 

docs/THREAT_MODEL.md

@@ -0,0 +1,27 @@
+# OnionWire threat model (v1)
+
+OnionWire is a two-party chat over Tor onion services. There is no chat server.
+
+## Tor relays are not a chat server
+
+Each install hosts its own v3 onion and dials friends’ onions through in-process Arti. Relays move cells; they never see plaintext, never store messages, and never hold a roster. Compromising a relay is not compromising OnionWire’s message store. The store is the sqlite file on the endpoint.
+
+## Location updates are not a missing-person finder
+
+A signed `loc` frame (`onion`, `ts`, `sig`) rewrites a friend’s locator **only if** that friend is already in the roster, the signature verifies against the pinned pubkey, and `ts` is newer. There is no directory, DHT, or introduction server. If you rotated while they were offline, they cannot find you until they rescan your QR. OnionWire will not hunt for a missing person.
+
+## Rotating the onion does not revoke a friend
+
+`F4` changes the locator only. The identity key is unchanged. Anyone who already has your pubkey can still prove they are talking to you, and a later QR/rescan with the same `k` updates their row. To become a new person, `/wipe-all` (new identity key). There is no in-band unfriend/revoke in v1.
+
+## v1 stores plaintext locally
+
+The message log, identity secret key, and friend public keys sit on disk unencrypted (aside from whatever the OS/FDE provides). A seized laptop yields the chat history and who you talk to. `/wipe` overwrites message bodies and vacuums; `/wipe-all` deletes the data dir. sqlcipher is out of v1.
+
+## Fail closed
+
+Peer onion down → send fails. Fingerprint mismatch vs the pinned key → hard fail, no send. Arti HS experimental: if it cannot publish, OnionWire stops; it does not fall back to C-tor.
+
+## Out of v1
+
+Prosody, XMPP, s2s, MAM, carbons, outbox, multi-device, DHT / name server, sqlcipher.

src/main.rs

@@ -1,3 +1,5 @@
+use onionwire::tui::AppExit;
+
 #[tokio::main]
 async fn main() {
     if let Err(e) = boot().await {
@@ -9,9 +11,14 @@ async fn main() {
 async fn boot() -> Result<(), String> {
     let home = onionwire::Store::home_dir().map_err(|e| e.to_string())?;
     eprintln!("onionwire: bootstrapping Arti…");
-    let node = onionwire::node::Node::start(home).await?;
+    let node = onionwire::node::Node::start(home.clone()).await?;
     let handle = tokio::runtime::Handle::current();
-    tokio::task::spawn_blocking(move || onionwire::tui::run(node, handle))
+    let exit = tokio::task::spawn_blocking(move || onionwire::tui::run(node, handle))
         .await
-        .map_err(|e| e.to_string())?
+        .map_err(|e| e.to_string())??;
+    if exit == AppExit::WipeAll {
+        onionwire::Store::wipe_all(&home).map_err(|e| e.to_string())?;
+        eprintln!("onionwire: all local data wiped");
+    }
+    Ok(())
 }

src/node.rs

@@ -141,6 +141,14 @@ impl Node {
             .map_err(|e| e.to_string())
     }
 
+    pub fn wipe_messages(&self) -> Result<(), String> {
+        self.store
+            .lock()
+            .map_err(|e| e.to_string())?
+            .wipe_messages()
+            .map_err(|e| e.to_string())
+    }
+
     pub async fn connect_onion(&self, onion: &str) -> Result<(), String> {
         tokio::time::timeout(
             Duration::from_secs(20),

src/store.rs

@@ -364,6 +364,25 @@ impl Store {
         }
         Ok(out)
     }
+
+    /// Overwrite message bodies, delete rows, VACUUM. Identity + friends stay.
+    pub fn wipe_messages(&self) -> Result<()> {
+        self.conn.execute(
+            "UPDATE messages SET plaintext = zeroblob(length(plaintext))",
+            [],
+        )?;
+        self.conn.execute("DELETE FROM messages", [])?;
+        self.conn.execute_batch("VACUUM")?;
+        Ok(())
+    }
+
+    /// Delete the data dir. Next `open_at` is a new identity. Caller must drop Store first.
+    pub fn wipe_all(home: &Path) -> Result<()> {
+        if home.exists() {
+            fs::remove_dir_all(home)?;
+        }
+        Ok(())
+    }
 }
 
 fn friend_from_row(row: &rusqlite::Row<'_>) -> rusqlite::Result<Friend> {

src/tui.rs

@@ -23,6 +23,97 @@ Offline friends CANNOT find you until they rescan your QR.\n\
 Type ROTATE to confirm    Esc to cancel"
 }
 
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum WipeKind {
+    Messages,
+    All,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum WipeDecision {
+    Pending,
+    Confirm,
+    Cancel,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum AppExit {
+    Quit,
+    WipeAll,
+}
+
+pub fn parse_slash(raw: &str) -> Option<WipeKind> {
+    match raw.trim() {
+        "/wipe" => Some(WipeKind::Messages),
+        "/wipe-all" => Some(WipeKind::All),
+        _ => None,
+    }
+}
+
+pub fn wipe_screen_text(kind: WipeKind) -> &'static str {
+    match kind {
+        WipeKind::Messages => {
+            "Wipe message log?\n\
+Identity key and friends stay.\n\
+Type WIPE to confirm    Esc to cancel"
+        }
+        WipeKind::All => {
+            "Wipe ALL local data?\n\
+This deletes your identity key. You become a new person.\n\
+Type WIPEALL to confirm    Esc to cancel"
+        }
+    }
+}
+
+#[derive(Debug)]
+pub struct WipePrompt {
+    expected: &'static str,
+    buf: String,
+}
+
+impl WipePrompt {
+    pub fn messages() -> Self {
+        Self {
+            expected: "WIPE",
+            buf: String::new(),
+        }
+    }
+
+    pub fn all() -> Self {
+        Self {
+            expected: "WIPEALL",
+            buf: String::new(),
+        }
+    }
+
+    pub fn on_esc(&self) -> WipeDecision {
+        WipeDecision::Cancel
+    }
+
+    pub fn on_char(&mut self, c: char) -> WipeDecision {
+        if c == '\n' {
+            return WipeDecision::Pending;
+        }
+        if c == '\u{8}' {
+            self.buf.pop();
+            return WipeDecision::Pending;
+        }
+        if !c.is_ascii_alphabetic() {
+            return WipeDecision::Pending;
+        }
+        self.buf.push(c);
+        if self.buf == self.expected {
+            WipeDecision::Confirm
+        } else {
+            WipeDecision::Pending
+        }
+    }
+
+    pub fn typed(&self) -> &str {
+        &self.buf
+    }
+}
+
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum RotateDecision {
     Pending,
@@ -68,7 +159,7 @@ impl RotatePrompt {
     }
 }
 
-pub fn run(node: Arc<Node>, rt: tokio::runtime::Handle) -> Result<(), String> {
+pub fn run(node: Arc<Node>, rt: tokio::runtime::Handle) -> Result<AppExit, String> {
     let mut app = App::new(node, rt)?;
     let mut terminal = ratatui::init();
     let result = app.run(&mut terminal);
@@ -86,6 +177,7 @@ struct App {
     me_onion: String,
     alert: Option<String>,
     status_note: Option<String>,
+    composer: String,
 }
 
 enum Screen {
@@ -94,6 +186,7 @@ enum Screen {
     Paste { buf: String, err: Option<String> },
     Approve { payload: QrPayload },
     Rotate { prompt: RotatePrompt },
+    Wipe { kind: WipeKind, prompt: WipePrompt },
 }
 
 impl App {
@@ -109,10 +202,11 @@ impl App {
             selected: 0,
             alert: None,
             status_note: None,
+            composer: String::new(),
         })
     }
 
-    fn run(&mut self, terminal: &mut DefaultTerminal) -> Result<(), String> {
+    fn run(&mut self, terminal: &mut DefaultTerminal) -> Result<AppExit, String> {
         loop {
             terminal.draw(|f| self.draw(f)).map_err(|e| e.to_string())?;
             let Event::Key(key) = event::read().map_err(io_err)? else {
@@ -122,13 +216,16 @@ impl App {
                 continue;
             }
             if key.code == KeyCode::Char('q') && key.modifiers.contains(KeyModifiers::CONTROL) {
-                return Ok(());
+                return Ok(AppExit::Quit);
+            }
+            if let Some(exit) = self.handle_key(key)? {
+                return Ok(exit);
             }
-            self.handle_key(key)?;
         }
     }
 
-    fn handle_key(&mut self, key: KeyEvent) -> Result<(), String> {
+    fn handle_key(&mut self, key: KeyEvent) -> Result<Option<AppExit>, String> {
+        let mut wipe_confirm = None;
         match &mut self.screen {
             Screen::Main => match key.code {
                 KeyCode::Up => {
@@ -151,6 +248,23 @@ impl App {
                         prompt: RotatePrompt::new(),
                     };
                 }
+                KeyCode::Esc => self.composer.clear(),
+                KeyCode::Backspace => {
+                    self.composer.pop();
+                }
+                KeyCode::Enter => {
+                    if let Some(kind) = parse_slash(&self.composer) {
+                        self.composer.clear();
+                        let prompt = match kind {
+                            WipeKind::Messages => WipePrompt::messages(),
+                            WipeKind::All => WipePrompt::all(),
+                        };
+                        self.screen = Screen::Wipe { kind, prompt };
+                    }
+                }
+                KeyCode::Char(c) if !key.modifiers.contains(KeyModifiers::CONTROL) => {
+                    self.composer.push(c);
+                }
                 _ => {}
             },
             Screen::Share { .. } => {
@@ -194,8 +308,38 @@ impl App {
                 }
                 _ => {}
             },
+            Screen::Wipe { kind, prompt } => {
+                let kind = *kind;
+                match key.code {
+                    KeyCode::Esc => self.screen = Screen::Main,
+                    KeyCode::Char(c) if !key.modifiers.contains(KeyModifiers::CONTROL) => {
+                        if prompt.on_char(c) == WipeDecision::Confirm {
+                            wipe_confirm = Some(kind);
+                        }
+                    }
+                    KeyCode::Backspace => {
+                        prompt.on_char('\u{8}');
+                    }
+                    _ => {}
+                }
+            }
+        }
+        if let Some(kind) = wipe_confirm {
+            return self.confirm_wipe(kind);
+        }
+        Ok(None)
+    }
+
+    fn confirm_wipe(&mut self, kind: WipeKind) -> Result<Option<AppExit>, String> {
+        match kind {
+            WipeKind::Messages => {
+                self.node.wipe_messages()?;
+                self.status_note = Some("wiped messages".into());
+                self.screen = Screen::Main;
+                Ok(None)
+            }
+            WipeKind::All => Ok(Some(AppExit::WipeAll)),
         }
-        Ok(())
     }
 
     fn confirm_rotate(&mut self) -> Result<(), String> {
@@ -268,12 +412,18 @@ impl App {
             Screen::Paste { buf, err } => draw_paste(f, buf, err.as_deref()),
             Screen::Approve { payload } => draw_approve(f, payload),
             Screen::Rotate { prompt } => draw_rotate(f, prompt.typed()),
+            Screen::Wipe { kind, prompt } => draw_wipe(f, *kind, prompt.typed()),
         }
     }
 
     fn draw_main(&self, f: &mut Frame) {
         let area = f.area();
-        let cols = Layout::vertical([Constraint::Min(1), Constraint::Length(1)]).split(area);
+        let cols = Layout::vertical([
+            Constraint::Min(1),
+            Constraint::Length(1),
+            Constraint::Length(1),
+        ])
+        .split(area);
         let body = if self.alert.is_some() {
             Layout::vertical([Constraint::Length(1), Constraint::Min(1)]).split(cols[0])
         } else {
@@ -329,7 +479,13 @@ impl App {
             truncate_fp(&self.me_fp),
             onion
         );
-        f.render_widget(Paragraph::new(status), cols[1]);
+        let cmd = if self.composer.is_empty() {
+            "/wipe  /wipe-all".to_string()
+        } else {
+            self.composer.clone()
+        };
+        f.render_widget(Paragraph::new(cmd), cols[1]);
+        f.render_widget(Paragraph::new(status), cols[2]);
     }
 }
 
@@ -377,6 +533,20 @@ fn draw_rotate(f: &mut Frame, typed: &str) {
     );
 }
 
+fn draw_wipe(f: &mut Frame, kind: WipeKind, typed: &str) {
+    let title = match kind {
+        WipeKind::Messages => "/wipe",
+        WipeKind::All => "/wipe-all",
+    };
+    let body = format!("{}\n\n{typed}", wipe_screen_text(kind));
+    f.render_widget(
+        Paragraph::new(body)
+            .wrap(Wrap { trim: false })
+            .block(Block::default().borders(Borders::ALL).title(title)),
+        f.area(),
+    );
+}
+
 fn truncate_fp(fp: &str) -> String {
     let s: String = fp.chars().take(8).collect();
     format!("{s}…")

tests/wipe.rs

@@ -0,0 +1,117 @@
+//! M5: wipe messages (keep identity + friends); wipe-all is a new person.
+
+use onionwire::Store;
+use onionwire::tui::{WipeDecision, WipeKind, WipePrompt, parse_slash, wipe_screen_text};
+
+fn pk(tag: u8) -> [u8; 32] {
+    let mut k = [0u8; 32];
+    k[0] = tag;
+    k
+}
+
+fn db_contains(home: &std::path::Path, needle: &[u8]) -> bool {
+    let Ok(bytes) = std::fs::read(home.join("onionwire.db")) else {
+        return false;
+    };
+    bytes.windows(needle.len()).any(|w| w == needle)
+}
+
+#[test]
+fn wipe_clears_messages_keeps_self_and_friends() {
+    let dir = tempfile::tempdir().expect("tempdir");
+    let store = Store::open_at(dir.path()).expect("open");
+    let me = store.self_identity().unwrap();
+    store
+        .upsert_friend(&pk(1), "a.onion", Some("alice"))
+        .unwrap();
+    store
+        .append_message(&pk(1), "out", b"secret-log-line-xyz")
+        .unwrap();
+    store.append_message(&pk(1), "in", b"reply").unwrap();
+    assert_eq!(store.list_messages(&pk(1)).unwrap().len(), 2);
+
+    store.wipe_messages().expect("wipe");
+
+    assert!(store.list_messages(&pk(1)).unwrap().is_empty());
+    assert_eq!(store.friend_count().unwrap(), 1);
+    let f = store.get_friend(&pk(1)).unwrap().expect("friend");
+    assert_eq!(f.petname.as_deref(), Some("alice"));
+    assert_eq!(f.onion, "a.onion");
+    let me2 = store.self_identity().unwrap();
+    assert_eq!(me.identity_pk, me2.identity_pk);
+    assert_eq!(me.identity_sk, me2.identity_sk);
+    drop(store);
+    assert!(
+        !db_contains(dir.path(), b"secret-log-line-xyz"),
+        "wipe must overwrite plaintext before VACUUM"
+    );
+}
+
+#[test]
+fn wipe_all_removes_dir_so_next_open_is_new_identity() {
+    let dir = tempfile::tempdir().expect("tempdir");
+    let home = dir.path().join("ow");
+    let store = Store::open_at(&home).expect("open");
+    let old_pk = store.self_identity().unwrap().identity_pk;
+    store.upsert_friend(&pk(1), "a.onion", None).unwrap();
+    store.append_message(&pk(1), "out", b"gone").unwrap();
+    drop(store);
+    assert!(home.join("onionwire.db").is_file());
+
+    Store::wipe_all(&home).expect("wipe-all");
+    assert!(!home.exists(), "data dir gone");
+
+    let store2 = Store::open_at(&home).expect("reopen");
+    let new_pk = store2.self_identity().unwrap().identity_pk;
+    assert_ne!(old_pk, new_pk, "new identity key = new person");
+    assert_eq!(store2.friend_count().unwrap(), 0);
+}
+
+#[test]
+fn slash_wipe_commands() {
+    assert_eq!(parse_slash("/wipe"), Some(WipeKind::Messages));
+    assert_eq!(parse_slash("  /wipe  "), Some(WipeKind::Messages));
+    assert_eq!(parse_slash("/wipe-all"), Some(WipeKind::All));
+    assert_eq!(parse_slash("/wipe-all\n"), Some(WipeKind::All));
+    assert_eq!(parse_slash("wipe"), None);
+    assert_eq!(parse_slash("/rotate"), None);
+}
+
+#[test]
+fn wipe_requires_typing_not_enter() {
+    let mut p = WipePrompt::messages();
+    assert_eq!(p.on_esc(), WipeDecision::Cancel);
+    assert_eq!(
+        p.on_char('\n'),
+        WipeDecision::Pending,
+        "Enter must not wipe"
+    );
+    for c in "WIP".chars() {
+        assert_eq!(p.on_char(c), WipeDecision::Pending);
+    }
+    assert_eq!(p.on_char('E'), WipeDecision::Confirm);
+}
+
+#[test]
+fn wipe_all_requires_typing_wipeall() {
+    let mut p = WipePrompt::all();
+    assert_eq!(p.on_char('\n'), WipeDecision::Pending);
+    for c in "WIPEAL".chars() {
+        assert_eq!(p.on_char(c), WipeDecision::Pending);
+    }
+    assert_eq!(p.on_char('L'), WipeDecision::Confirm);
+}
+
+#[test]
+fn wipe_prompt_text_matches_spec() {
+    let m = wipe_screen_text(WipeKind::Messages);
+    assert!(m.contains("Wipe message log?"));
+    assert!(m.contains("Identity key and friends stay."));
+    assert!(m.contains("Type WIPE to confirm"));
+    assert!(m.contains("Esc to cancel"));
+    let a = wipe_screen_text(WipeKind::All);
+    assert!(a.contains("Wipe ALL local data?"));
+    assert!(a.contains("This deletes your identity key. You become a new person."));
+    assert!(a.contains("Type WIPEALL to confirm"));
+    assert!(a.contains("Esc to cancel"));
+}