Extract the identical PTY session setup shared by the wasm and Android
terminal clients into ssh.StartPTYSession, and move the stored-key host
verification onto the engine so the embed client delegates and the
Android client passes the engine directly as HostKeyVerifier.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Regular (non-NetBird) servers used InsecureIgnoreHostKey while also
offering the user's password, so an impersonating endpoint could collect
it. Replace that with a per-profile known-hosts store: an unknown host
returns a marker carrying the fingerprint so the client can show it and,
once confirmed, retry with the key trusted and persisted; a changed key
is rejected outright, as OpenSSH does. The confirmation is single-use and
cleared once the key is stored.
The server-type switch now handles the regular case explicitly and
rejects unknown types instead of routing them through the unverified
path. Java sets the store path (per profile, since an overlay IP is a
different host under a different profile) and can drop a host's key once
no session targets it.
DialContext limited only the TCP establishment, so a peer that accepted
the connection and then stayed silent left gossh.NewClientConn blocking
forever and the terminal stuck on "Connecting".
Set the socket deadline from the dial context before the handshake and
clear it on success, so the handshake shares the dial timeout instead of
being able to hang. Verified against a silent listener: the connect now
returns i/o timeout instead of blocking.
Any authentication failure on a regular server returned the
password-required marker, so against a server with password
authentication disabled the client asked again after every attempt and
reported each one as a wrong password.
gossh only lists a method under "attempted methods" when the server
offered it. When a supplied password never got attempted, surface the
real error instead of the marker, the same way the desktop client
reports it. A first connect without a password still prompts.
The connect path logged the target host, port and username at info level,
which the guidelines reserve for debug and below.
Drop the two connect messages entirely rather than lowering them: both sat
directly in front of a return, so the same error already reaches the caller
and the terminal, and OnConnected reports the success. Keep the detected
server type, since it decides the auth path, but log it without the
endpoint.
The port arrives as an int because gomobile cannot carry uint16 across the
Java boundary, so nothing rejected a value outside the valid range. It
reached strconv.Itoa and only surfaced as a dial failure, after the server
detection had already spent its timeout.
Open and OnLoginSuccess were each started in their own goroutine, so they
raced. Open is what marks the surface as opened on the client side, and
OnLoginSuccess does nothing until it has, so a token that arrived quickly
left the browser sitting in front of the terminal — the dismissal was
dropped rather than delayed.
The login and session-extend flows do not hit this because their two calls
live in separate functions with a blocking wait between them. Here both
are in one function, so ordering has to come from calling them in turn.
Also groups the file's helpers with the code they serve.
The JWT device-code flow opened the verification URL through the URL
opener but never told it the round-trip had finished, so the Custom Tab
stayed in front of the terminal after the token had already been
collected and the user had to dismiss it by hand.
Call OnLoginSuccess once a non-empty token is in hand, which is what the
login and session-extend flows already do; the Android side reacts by
bringing its own activity forward.
Connect() reports a password-required marker instead of a raw handshake
error when a regular SSH server turns down the NetBird key, so the caller
can prompt and retry as often as the user needs. NetBird servers are
excluded: they authenticate with a JWT or the NetBird key, so a failure
there is genuine. The marker is a string because gomobile flattens errors
to their message across the binding.
Errors that reach the terminal are unwrapped to their root cause, so a
dial failure reads "i/o timeout" rather than repeating every layer that
added context; the full chain still goes to the log. A normal shell exit
no longer surfaces as "EOF".
Reset() lets a closed client back a reconnect, which keeps the Java-side
session and its scrollback alive across a drop, and the JWT flow now
reports that it is waiting on the browser instead of blocking silently.
Exposes SSHClient + SSHTerminalListener to the Android app. Connect()
auto-detects the server type via banner inspection and selects the auth
path: NetBird-SSH with JWT triggers the device-code OAuth flow via the
existing URLOpener; NetBird-SSH without JWT uses the NetBird private
key; regular SSH falls back to NetBird key then optional password. The
client dials through the running tunnel using a plain net.Dialer and
relies on the gomobile-bound listener for streaming PTY output back to
Java for rendering in an xterm.js WebView.
