fix(cli): hide store passphrase like a password prompt

stdin read_line echoed the passphrase. rpassword disables tty echo.
ONIONWIRE_STORE_PASSPHRASE still skips the prompt.

Cargo.lock

@@ -2639,6 +2639,7 @@ dependencies = [
  "md-5",
  "rand 0.8.8",
  "ratatui",
+ "rpassword",
  "rusqlite",
  "safelog",
  "serde_json",
@@ -3381,6 +3382,17 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "rpassword"
+version = "7.5.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2da316a15f47e3d053de9cb2c439650bd8fa4aaeb9365f2e5f27f492ff73c196"
+dependencies = [
+ "libc",
+ "rtoolbox",
+ "windows-sys 0.61.2",
+]
+
 [[package]]
 name = "rsa"
 version = "0.9.10"
@@ -3402,6 +3414,16 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "rtoolbox"
+version = "0.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a1efe12a1469752d0e6ff5ebec0b6ef4924cc5c4c71046b0ec730040535819d"
+dependencies = [
+ "libc",
+ "windows-sys 0.61.2",
+]
+
 [[package]]
 name = "rusqlite"
 version = "0.36.0"

Cargo.toml

@@ -45,6 +45,7 @@ argon2 = "0.5"
 chacha20poly1305 = "0.10"
 sha3 = "0.10"
 md-5 = "0.10"
+rpassword = "7"
 
 [dev-dependencies]
 tempfile = "3"

README.md

@@ -108,7 +108,7 @@ onionwire
 
 or `cargo run --release`.
 
-On start you are prompted for a store passphrase (or set `ONIONWIRE_STORE_PASSPHRASE`). Empty passphrase is rejected; a wrong passphrase does not open chat. Then you should see `onionwire: bootstrapping Arti…` on stderr. Directory bootstrap is usually under a minute; the onion is ready once a probe connect works (combined Arti status may still say Bootstrapping). Fail closed at 360s. 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.
+On start you are prompted for a store passphrase (echo off, like other CLI passwords) or set `ONIONWIRE_STORE_PASSPHRASE`. Empty passphrase is rejected; a wrong passphrase does not open chat. Then you should see `onionwire: bootstrapping Arti…` on stderr. Directory bootstrap is usually under a minute; the onion is ready once a probe connect works (combined Arti status may still say Bootstrapping). Fail closed at 360s. 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.
 
 Then `F2` to share your invite, `F3` to paste a friend’s. Mouse-select the `onionwire:v1:…` line to copy.
 

src/lib.rs

@@ -13,4 +13,7 @@ mod store;
 pub mod tui;
 pub mod wallet;
 
-pub use store::{Friend, FriendProfile, Message, Payment, PaymentWrite, SelfIdentity, Store};
+pub use store::{
+    Friend, FriendProfile, Message, Payment, PaymentWrite, SelfIdentity, Store,
+    resolve_store_passphrase,
+};

src/main.rs

@@ -1,5 +1,4 @@
 use onionwire::tui::AppExit;
-use std::io::{self, Write};
 
 fn print_help() {
     let v = env!("CARGO_PKG_VERSION");
@@ -35,7 +34,8 @@ async fn main() {
 
 async fn boot() -> Result<(), String> {
     let home = onionwire::Store::home_dir().map_err(|e| e.to_string())?;
-    let pass = store_passphrase()?;
+    let pass = onionwire::resolve_store_passphrase(|p| rpassword::prompt_password(p))
+        .map_err(|e| e.to_string())?;
     eprintln!("onionwire: bootstrapping Arti…");
     let node = onionwire::node::Node::start_with_passphrase(home.clone(), &pass).await?;
     let handle = tokio::runtime::Handle::current();
@@ -48,22 +48,3 @@ async fn boot() -> Result<(), String> {
     }
     Ok(())
 }
-
-fn store_passphrase() -> Result<String, String> {
-    match std::env::var("ONIONWIRE_STORE_PASSPHRASE") {
-        Ok(p) if p.is_empty() => Err("empty passphrase".into()),
-        Ok(p) => Ok(p),
-        Err(_) => {
-            eprint!("onionwire: store passphrase: ");
-            let _ = io::stderr().flush();
-            let mut s = String::new();
-            io::stdin().read_line(&mut s).map_err(|e| e.to_string())?;
-            let s = s.trim_end_matches(['\n', '\r']).to_string();
-            if s.is_empty() {
-                Err("empty passphrase".into())
-            } else {
-                Ok(s)
-            }
-        }
-    }
-}

src/store.rs

@@ -4,9 +4,9 @@ use std::path::{Path, PathBuf};
 use std::time::{SystemTime, UNIX_EPOCH};
 
 use ed25519_dalek::SigningKey;
-use rand::rngs::OsRng;
 use rand::RngCore;
-use rusqlite::{params, Connection, OptionalExtension};
+use rand::rngs::OsRng;
+use rusqlite::{Connection, OptionalExtension, params};
 use x25519_dalek::{PublicKey as X25519Public, StaticSecret};
 
 pub type Result<T> = std::result::Result<T, Error>;
@@ -831,6 +831,26 @@ fn passphrase_from_env() -> Result<String> {
     }
 }
 
+/// Env `ONIONWIRE_STORE_PASSPHRASE` if set (non-empty). Otherwise `read_secret`
+/// (TTY, no echo). Empty values fail closed.
+pub fn resolve_store_passphrase(
+    read_secret: impl FnOnce(&str) -> std::io::Result<String>,
+) -> Result<String> {
+    match std::env::var("ONIONWIRE_STORE_PASSPHRASE") {
+        Ok(p) if p.is_empty() => Err(Error("empty passphrase".into())),
+        Ok(p) => Ok(p),
+        Err(_) => {
+            let s = read_secret("onionwire: store passphrase: ")?;
+            let s = s.trim_end_matches(['\n', '\r']).to_string();
+            if s.is_empty() {
+                Err(Error("empty passphrase".into()))
+            } else {
+                Ok(s)
+            }
+        }
+    }
+}
+
 fn mkdir_700(path: &Path) -> Result<()> {
     fs::create_dir_all(path)?;
     let mut perms = fs::metadata(path)?.permissions();

tests/store.rs

@@ -264,3 +264,64 @@ fn reopen_with_same_passphrase_decrypts() {
     let msgs = store.list_messages(&pk(1)).unwrap();
     assert_eq!(msgs[0].plaintext, b"hello again");
 }
+
+#[test]
+fn env_passphrase_skips_prompt() {
+    let _g = ENV_LOCK.lock().expect("env lock");
+    unsafe {
+        std::env::set_var("ONIONWIRE_STORE_PASSPHRASE", "from-env");
+    }
+    let mut prompted = false;
+    let got = onionwire::resolve_store_passphrase(|_| {
+        prompted = true;
+        Ok("from-tty".into())
+    });
+    unsafe {
+        std::env::remove_var("ONIONWIRE_STORE_PASSPHRASE");
+    }
+    assert_eq!(got.unwrap(), "from-env");
+    assert!(!prompted);
+}
+
+#[test]
+fn empty_env_passphrase_is_rejected_without_prompt() {
+    let _g = ENV_LOCK.lock().expect("env lock");
+    unsafe {
+        std::env::set_var("ONIONWIRE_STORE_PASSPHRASE", "");
+    }
+    let mut prompted = false;
+    let err = onionwire::resolve_store_passphrase(|_| {
+        prompted = true;
+        Ok("from-tty".into())
+    })
+    .unwrap_err();
+    unsafe {
+        std::env::remove_var("ONIONWIRE_STORE_PASSPHRASE");
+    }
+    assert!(err.to_string().contains("empty"), "got {err}");
+    assert!(!prompted);
+}
+
+#[test]
+fn missing_env_reads_secret_and_strips_newline() {
+    let _g = ENV_LOCK.lock().expect("env lock");
+    unsafe {
+        std::env::remove_var("ONIONWIRE_STORE_PASSPHRASE");
+    }
+    let got = onionwire::resolve_store_passphrase(|prompt| {
+        assert!(prompt.contains("store passphrase"), "prompt {prompt}");
+        Ok("secret-from-tty\n".into())
+    })
+    .unwrap();
+    assert_eq!(got, "secret-from-tty");
+}
+
+#[test]
+fn missing_env_empty_secret_is_rejected() {
+    let _g = ENV_LOCK.lock().expect("env lock");
+    unsafe {
+        std::env::remove_var("ONIONWIRE_STORE_PASSPHRASE");
+    }
+    let err = onionwire::resolve_store_passphrase(|_| Ok(String::new())).unwrap_err();
+    assert!(err.to_string().contains("empty"), "got {err}");
+}