GREEN. rustls 0.23 selects its CryptoProvider from its own 'ring' /
'aws-lc-rs' crate features. Arti reaches rustls through tor-rtcompat with
default-features = false and nothing in this workspace turned a provider
feature on, so rustls was compiled with zero providers and the first TLS
config built from the process default panicked:
Could not automatically determine the process-level CryptoProvider from
Rustls crate features. ...
That is the 'Failed to start' screen on the unlock path. The 'ring' crate
being present in the graph (via snow, for Noise) never had anything to do
with it.
'ring', not 'aws-lc-rs': aws-lc-rs wants CMake and a C toolchain for the
NDK and fights the cross-compile.
Belt and braces: open_wire() now calls install_crypto_provider() before
Node::start_with_passphrase, a OnceLock-guarded
ring::default_provider().install_default() with the already-installed Err
ignored. That keeps the cdylib correct regardless of how a consumer's
feature graph resolves rustls.
aws-lc-rs is absent from the lock, so there is no two-provider conflict to
report.
Evidence:
cargo test --release --test provider_resolution
before: panicked at rustls-0.23.44/src/crypto/mod.rs:249 (device message)
after: 1 passed
cargo tree -f '{p} [{f}]' -p rustls
rustls v0.23.44 [log,logging,ring,std,tls12]
Adds the Android product alongside the existing Linux TUI, in one repo.
SDK — crates/onionwire-sdk is a UniFFI facade over the very same `onionwire`
crate the TUI runs on. Identity, invite, friend upsert, send/receive, rotate
and wipe all delegate; no protocol is reimplemented, so an Android peer and a
Linux peer interoperate. It is its own Cargo workspace because Arti's TLS
backends are non-additive: the TUI keeps native-tls (OpenSSL), Android needs
rustls + static-sqlite (no OpenSSL, no system libsqlite3 in the NDK).
android/ — Gradle project. :sdk produces the AAR (Kotlin bindings generated at
build time + libonionwire_sdk.so via cargo-ndk), :app is a Kotlin/Compose/M3
messenger depending on :sdk only. minSdk 26, targetSdk/compileSdk 36,
INTERNET-only, data in filesDir, backups excluded.
Root Cargo.toml grows `native-tls` (default) and `rustls` features so exactly
one Arti TLS backend is selected per build graph. The default build is
unchanged: same backend, ratatui still a normal dependency, src/tui.rs
untouched.
Also: Store::self_fingerprint/set_petname + Node wrappers (additive only),
scripts/build-android-local.sh, README sections, .gitignore for local SDK paths.
