1386 lines
57 KiB
JavaScript
1386 lines
57 KiB
JavaScript
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/* eslint-disable no-undef */
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const { resolveSshConnectionTimeouts } = require("../sshBridge/startSession.cjs");
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const { runWhenProxyConnectionReady } = require("../proxyUtils.cjs");
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const { normalizeFileProtocol } = require("./scpShell.cjs");
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const { getScpBackendForClient } = require("./scpBackend.cjs");
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const {
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executeBoundedSshCommand,
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openBoundedSshExecStreamCallback,
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terminateSshExecStream,
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} = require("../boundedSshExec.cjs");
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const { openBoundedSftpChannel } = require("../boundedSftpOpen.cjs");
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const { openBoundedForwardOutCallback } = require("../boundedSshChannelOpen.cjs");
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/** Bound shell/scp probes so a hung remote exec cannot leave the panel connecting forever. */
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const SCP_PROBE_TIMEOUT_MS = 15_000;
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/**
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* AbortSignal that fires on parent abort or after timeoutMs.
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* Caller must dispose() to clear the timer.
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*/
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function createBoundedProbeSignal(parentSignal = null, timeoutMs = SCP_PROBE_TIMEOUT_MS) {
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const ac = new AbortController();
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let timedOut = false;
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let timer = null;
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const onParentAbort = () => {
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try { ac.abort(); } catch { /* ignore */ }
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};
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if (parentSignal?.aborted) {
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ac.abort();
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} else {
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if (parentSignal && typeof parentSignal.addEventListener === "function") {
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parentSignal.addEventListener("abort", onParentAbort, { once: true });
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}
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timer = setTimeout(() => {
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timedOut = true;
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try { ac.abort(); } catch { /* ignore */ }
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}, Math.max(1, Number(timeoutMs) || SCP_PROBE_TIMEOUT_MS));
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if (typeof timer.unref === "function") timer.unref();
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}
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return {
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signal: ac.signal,
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get timedOut() {
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return timedOut;
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},
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dispose: () => {
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if (timer) clearTimeout(timer);
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if (parentSignal && typeof parentSignal.removeEventListener === "function") {
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try { parentSignal.removeEventListener("abort", onParentAbort); } catch { /* ignore */ }
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}
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},
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};
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}
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/** Return true when ssh2 reports an authentication-stage failure. */
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function isSftpAuthError(err) {
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const level = String(err?.level || "").toLowerCase();
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const message = String(err?.message || "").toLowerCase();
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return level.includes("authentication") || message.includes("authentication");
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}
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/** Decide whether the SFTP target should retry with keyboard-interactive before password. */
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function shouldRetrySftpKeyboardInteractiveFirst(options, authConfig, err) {
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return Boolean(
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options?.password &&
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!options?._skipPasswordMethod &&
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isSftpAuthError(err) &&
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authConfig?.authPhase?.retryKeyboardInteractiveFirst,
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);
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}
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function shouldRegisterFreshSftpTransport(options) {
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return options?.reuseTransport !== false && !options?.sudo;
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}
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/** Sudo is part of the requested connection contract; never downgrade it. */
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async function openRequiredSudoSftp({
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connectSudoSftp,
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sshClient,
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password,
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closeFreshClient,
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}) {
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try {
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return await connectSudoSftp(sshClient, password);
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} catch (error) {
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closeFreshClient();
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throw error;
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}
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}
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function createOpenConnectionApi(ctx) {
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with (ctx) {
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/**
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* Mark a session client as SCP-mode and optionally probe shell access.
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*/
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async function activateScpMode(client, { probe = true, signal = null, timeoutMs = SCP_PROBE_TIMEOUT_MS } = {}) {
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client.__netcattyFileProtocol = "scp";
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client.sftp = null;
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// Ensure closeSftp can tear down owned SSH sockets even when sftp is null.
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// Never end a shared terminal session socket.
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if (typeof client.end === "function" && !client.__netcattyScpEndWrapped) {
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const prevEnd = client.end.bind(client);
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client.end = async (...args) => {
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const ownsSocket = !client.__netcattySessionBacked
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&& !client.__netcattySourceSessionId
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&& !client.__netcattyTransportManaged;
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if (ownsSocket) {
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try { client.client?.end?.(); } catch { /* ignore */ }
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try { client.client?.destroy?.(); } catch { /* ignore */ }
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}
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return prevEnd(...args);
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};
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client.__netcattyScpEndWrapped = true;
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}
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if (probe) {
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const bounded = createBoundedProbeSignal(signal, timeoutMs);
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try {
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const backend = getScpBackendForClient(client);
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// Require a working shell AND scp binary — transfers need `scp -t/-f`.
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await backend.homeDir({ signal: bounded.signal }).catch(async () => {
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if (bounded.signal.aborted) throw new Error("SCP mode shell probe aborted");
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const adapters = require("./scpBackend.cjs").createSshExecAdapters(client.client);
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const pwd = await adapters.exec("pwd", { signal: bounded.signal });
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if (pwd.code !== 0 || !(pwd.stdout || "").trim()) {
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throw new Error("SCP mode shell probe failed");
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}
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});
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const adapters = require("./scpBackend.cjs").createSshExecAdapters(client.client);
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const scpProbe = await adapters.exec(
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"command -v scp >/dev/null 2>&1 || which scp >/dev/null 2>&1",
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{ signal: bounded.signal },
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);
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if (scpProbe.code !== 0) {
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throw new Error("SCP binary not available on remote host (command -v scp failed)");
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}
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} catch (err) {
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if (bounded.timedOut && !signal?.aborted) {
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throw new Error(`SCP mode probe timed out after ${timeoutMs}ms`);
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}
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throw err;
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} finally {
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bounded.dispose();
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}
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}
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return client;
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}
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const hasUsableProxy = (proxy) => {
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if (!proxy) return false;
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if (proxy.type === "command") return !!proxy.command?.trim();
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return !!(proxy.host && proxy.port);
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};
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async function connectThroughChainForSftp(event, options, jumpHosts, targetHost, targetPort, connId) {
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const sender = event.sender;
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const connections = [];
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let currentSocket = null;
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let activeConn = null;
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const defaultAgentSocket = await getAvailableAgentSocket();
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const cleanupSocket = (socket) => {
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if (!socket) return;
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try { socket.end?.(); } catch { /* ignore */ }
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try { socket.destroy?.(); } catch { /* ignore */ }
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};
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try {
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// Connect through each jump host
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for (let i = 0; i < jumpHosts.length; i++) {
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const jump = jumpHosts[i];
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const isFirst = i === 0;
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const isLast = i === jumpHosts.length - 1;
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const hopLabel = jump.label || (jump.hostname.includes(':') && !jump.hostname.startsWith('[') ? `[${jump.hostname}]:${jump.port || 22}` : `${jump.hostname}:${jump.port || 22}`);
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console.log(`[SFTP Chain] Hop ${i + 1}/${jumpHosts.length}: Connecting to ${hopLabel}...`);
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sendSftpProgress(sender, connId, hopLabel, 'connecting');
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const conn = new SSHClient();
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activeConn = conn;
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// Increase max listeners to prevent Node.js warning
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// Set to 0 (unlimited) since complex operations add many temp listeners
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conn.setMaxListeners(0);
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// Per-hop keepalive. The renderer's resolver returns either a positive
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// number (use it) or 0 (the host explicitly opted out, e.g. a router
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// whose SSH stack doesn't reply to keepalive@openssh.com). Only when
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// BOTH the per-hop and the target-call fields are undefined do we
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// fall back to 10s/3 — that path exists for older serializers that
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// pre-date per-host plumbing, preserving the #669 idle-NAT protection
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// for callers that haven't yet been updated.
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const hopInterval = jump.keepaliveInterval != null
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? jump.keepaliveInterval
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: options.keepaliveInterval;
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const hopCountMax = jump.keepaliveCountMax != null
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? jump.keepaliveCountMax
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: options.keepaliveCountMax;
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const hopIntervalMs = hopInterval == null
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? 10000
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: (hopInterval > 0 ? hopInterval * 1000 : 0);
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const hopCountMaxEffective = hopInterval == null
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? 3
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: (hopInterval > 0 ? (hopCountMax ?? 3) : 0);
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const hopConnectionTimeouts = resolveSshConnectionTimeouts(jump);
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// Build connection options
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const connOpts = {
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host: jump.hostname,
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port: jump.port || 22,
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username: jump.username || 'root',
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timeout: hopConnectionTimeouts.tcpConnectTimeoutMs,
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readyTimeout: 0,
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keepaliveInterval: hopIntervalMs,
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keepaliveCountMax: hopCountMaxEffective,
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// Enable keyboard-interactive authentication (required for 2FA/MFA)
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tryKeyboard: true,
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// Per-hop algorithm settings, mirroring sshBridge.cjs:
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// - `legacyAlgorithms` falls back to the target's setting
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// (append-only — safe to widen the hop's offer for chain
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// convenience).
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// - `skipEcdsaHostKey` and `algorithmOverrides` are strictly
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// per-host. They *narrow* the offered list (drop ecdsa-* or
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// replace a category), so propagating the leaf's setting
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// would break an ECDSA-required or Ed25519-only bastion.
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algorithms: buildSftpAlgorithms(
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jump.legacyAlgorithms ?? options.legacyAlgorithms,
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{
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skipEcdsaHostKey: jump.skipEcdsaHostKey,
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algorithmOverrides: jump.algorithmOverrides,
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},
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),
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};
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connOpts.hostVerifier = hostKeyVerifier.createHostVerifier({
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sender,
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sessionId: connId,
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hostname: jump.hostname,
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port: jump.port || 22,
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knownHosts: options.knownHosts,
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verifyHostKeys: jump.verifyHostKeys ?? options.verifyHostKeys,
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});
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// Auth - support agent (certificate), key, and password fallback
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const hasCertificate =
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typeof jump.certificate === "string" && jump.certificate.trim().length > 0;
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const systemAuthAgent = hasCertificate
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? null
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: await prepareSystemSshAgentForAuth(jump, `[SFTP Chain] Hop ${i + 1}:`);
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const identityFile = !jump.privateKey && !systemAuthAgent
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? await loadFirstIdentityFileForAuth({
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sender,
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identityFilePaths: jump.identityFilePaths,
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hostname: hopLabel,
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initialPassphrase: jump.passphrase,
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logPrefix: `[SFTP Chain] Hop ${i + 1}:`,
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onLoaded: (loaded) => {
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console.log(`[SFTP Chain] Hop ${i + 1}: loaded identity file ${loaded.keyPath}`);
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},
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onError: (err, keyPath) => {
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console.warn(`[SFTP Chain] Hop ${i + 1}: failed to read identity file ${keyPath}:`, err.message);
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},
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})
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: null;
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const inlineKey = jump.privateKey && !systemAuthAgent
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? await preparePrivateKeyForAuth({
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sender,
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privateKey: jump.privateKey,
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keyId: jump.keyId,
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keyName: jump.keyId || jump.label || jump.username,
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hostname: hopLabel,
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initialPassphrase: jump.passphrase,
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logPrefix: `[SFTP Chain] Hop ${i + 1}:`,
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})
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: null;
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const effectivePrivateKey = inlineKey?.privateKey || identityFile?.privateKey;
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const effectivePassphrase = inlineKey?.passphrase || identityFile?.passphrase;
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let authAgent = null;
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if (systemAuthAgent) {
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connOpts.agent = systemAuthAgent;
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}
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if (hasCertificate) {
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authAgent = new NetcattyAgent({
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mode: "certificate",
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webContents: event.sender,
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meta: {
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label: jump.keyId || jump.username || "",
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certificate: jump.certificate,
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privateKey: effectivePrivateKey,
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passphrase: effectivePassphrase,
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},
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});
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connOpts.agent = authAgent;
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} else if (effectivePrivateKey) {
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connOpts.privateKey = effectivePrivateKey;
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if (effectivePassphrase) {
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connOpts.passphrase = effectivePassphrase;
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} else if (isKeyEncrypted(effectivePrivateKey)) {
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// Key is encrypted but no passphrase provided — prompt the user
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console.log(`[SFTP Chain] Hop ${i + 1}: key is encrypted, requesting passphrase`);
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const keyLabel = jump.label || hopLabel;
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const result = await passphraseHandler.requestPassphrase(
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sender,
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`SSH key for ${keyLabel}`,
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keyLabel,
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hopLabel
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);
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if (result?.passphrase) {
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connOpts.passphrase = result.passphrase;
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} else {
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delete connOpts.privateKey;
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if (result?.cancelled) {
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throw new Error(`Passphrase entry cancelled for ${hopLabel}`);
|
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}
|
||
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}
|
||
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}
|
||
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}
|
||
|
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|
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if (jump.password) connOpts.password = jump.password;
|
||
|
|
|
||
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// Get default keys (either from options if pre-fetched, or fetch them now)
|
||
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const defaultKeys = systemAuthAgent && jump.identitiesOnly
|
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? []
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||
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: options._defaultKeys || await findAllDefaultPrivateKeysFromHelper();
|
||
|
|
|
||
|
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// Build auth handler using shared helper
|
||
|
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// Pass unlocked encrypted keys from options so jump hosts can use them for retry
|
||
|
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const authConfig = buildAuthHandler({
|
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authMethod: jump.authMethod,
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requiresMfa: !!jump.requiresMfa,
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||
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privateKey: connOpts.privateKey,
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password: connOpts.password,
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passphrase: connOpts.passphrase,
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agent: connOpts.agent,
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username: connOpts.username,
|
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logPrefix: `[SFTP Chain] Hop ${i + 1}`,
|
||
|
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unlockedEncryptedKeys: systemAuthAgent && jump.identitiesOnly
|
||
|
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? []
|
||
|
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: options._unlockedEncryptedKeys || [],
|
||
|
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defaultKeys,
|
||
|
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sshAgentSocketOverride: defaultAgentSocket,
|
||
|
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allowAgentFallback: jump.useSshAgent !== false,
|
||
|
|
onAuthAttempt: (method) => {
|
||
|
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sendSftpProgress(sender, connId, hopLabel, 'auth-attempt', method);
|
||
|
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},
|
||
|
|
});
|
||
|
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applyAuthToConnOpts(connOpts, authConfig);
|
||
|
|
const hopAuthPhase = authConfig.authPhase || { hadPartialSuccess: false };
|
||
|
|
|
||
|
|
// If first hop and proxy is configured, connect through proxy
|
||
|
|
const hasUsableJumpProxy = hasUsableProxy(jump.proxy);
|
||
|
|
const effectiveHopProxy = isFirst ? ((hasUsableJumpProxy ? jump.proxy : null) || options.proxy) : null;
|
||
|
|
if (effectiveHopProxy) {
|
||
|
|
currentSocket = await createProxySocket(effectiveHopProxy, jump.hostname, jump.port || 22, {
|
||
|
|
timeoutMs: hopConnectionTimeouts.tcpConnectTimeoutMs,
|
||
|
|
});
|
||
|
|
connOpts.sock = currentSocket;
|
||
|
|
delete connOpts.host;
|
||
|
|
delete connOpts.port;
|
||
|
|
} else if (!isFirst && currentSocket) {
|
||
|
|
// Tunnel through previous hop
|
||
|
|
connOpts.sock = currentSocket;
|
||
|
|
delete connOpts.host;
|
||
|
|
delete connOpts.port;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Connect this hop
|
||
|
|
await new Promise((resolve, reject) => {
|
||
|
|
let settled = false;
|
||
|
|
let authReadyTimer = null;
|
||
|
|
const clearAuthReadyTimer = () => {
|
||
|
|
if (!authReadyTimer) return;
|
||
|
|
clearTimeout(authReadyTimer);
|
||
|
|
authReadyTimer = null;
|
||
|
|
};
|
||
|
|
conn.once('connect', () => {
|
||
|
|
runWhenProxyConnectionReady(conn._sock, () => {
|
||
|
|
try { conn._sock?.setTimeout?.(0); } catch { /* ignore */ }
|
||
|
|
clearAuthReadyTimer();
|
||
|
|
authReadyTimer = setTimeout(
|
||
|
|
() => conn.emit('timeout'),
|
||
|
|
hopConnectionTimeouts.authReadyTimeoutMs,
|
||
|
|
);
|
||
|
|
authReadyTimer.unref?.();
|
||
|
|
});
|
||
|
|
});
|
||
|
|
conn.once('handshake', () => {
|
||
|
|
sendSftpProgress(sender, connId, hopLabel, 'authenticating');
|
||
|
|
});
|
||
|
|
conn.once('ready', () => {
|
||
|
|
if (settled) return;
|
||
|
|
settled = true;
|
||
|
|
clearAuthReadyTimer();
|
||
|
|
console.log(`[SFTP Chain] Hop ${i + 1}/${jumpHosts.length}: ${hopLabel} connected`);
|
||
|
|
sendSftpProgress(sender, connId, hopLabel, 'connected');
|
||
|
|
resolve();
|
||
|
|
});
|
||
|
|
conn.on('error', (err) => {
|
||
|
|
// Filter out non-fatal agent auth errors (same as in openSftp)
|
||
|
|
if (err.level === 'agent') {
|
||
|
|
console.log(`[SFTP Chain] Hop ${i + 1} non-fatal agent auth error (will try next method):`, err.message);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (settled) return;
|
||
|
|
settled = true;
|
||
|
|
clearAuthReadyTimer();
|
||
|
|
console.error(`[SFTP Chain] Hop ${i + 1}/${jumpHosts.length}: ${hopLabel} error:`, err.message);
|
||
|
|
sendSftpProgress(sender, connId, hopLabel, 'error', err.message);
|
||
|
|
reject(err);
|
||
|
|
});
|
||
|
|
conn.once('timeout', () => {
|
||
|
|
if (settled) return;
|
||
|
|
settled = true;
|
||
|
|
clearAuthReadyTimer();
|
||
|
|
console.error(`[SFTP Chain] Hop ${i + 1}/${jumpHosts.length}: ${hopLabel} timeout`);
|
||
|
|
reject(new Error(`Connection timeout to ${hopLabel}`));
|
||
|
|
});
|
||
|
|
conn.once('close', () => {
|
||
|
|
if (settled) return;
|
||
|
|
settled = true;
|
||
|
|
clearAuthReadyTimer();
|
||
|
|
reject(new Error(`Connection closed before authentication completed for ${hopLabel}`));
|
||
|
|
});
|
||
|
|
let authBanner = "";
|
||
|
|
conn.on('banner', (message) => {
|
||
|
|
authBanner = String(message || "").trim();
|
||
|
|
});
|
||
|
|
// Handle keyboard-interactive authentication for jump hosts (2FA/MFA)
|
||
|
|
const sftpChainKiHandler = createKeyboardInteractiveHandler({
|
||
|
|
sender,
|
||
|
|
sessionId: connId,
|
||
|
|
hostId: jump.hostId,
|
||
|
|
hostname: hopLabel,
|
||
|
|
password: jump.password,
|
||
|
|
logPrefix: `[SFTP Chain] Hop ${i + 1}/${jumpHosts.length}`,
|
||
|
|
scope: "external",
|
||
|
|
getAuthBanner: () => authBanner,
|
||
|
|
shouldSkipAutoFill: () => shouldSkipKiPasswordAutoFill(hopAuthPhase),
|
||
|
|
});
|
||
|
|
conn.on('keyboard-interactive', (name, instructions, lang, prompts, finish) => {
|
||
|
|
if (prompts && prompts.length > 0) {
|
||
|
|
sendSftpProgress(sender, connId, hopLabel, 'auth-attempt', 'waiting for user input...');
|
||
|
|
}
|
||
|
|
const wrappedFinish = (...args) => {
|
||
|
|
sendSftpProgress(sender, connId, hopLabel, 'auth-attempt', 'user responded');
|
||
|
|
finish(...args);
|
||
|
|
};
|
||
|
|
sftpChainKiHandler(name, instructions, lang, prompts, wrappedFinish);
|
||
|
|
});
|
||
|
|
conn.connect(connOpts);
|
||
|
|
});
|
||
|
|
|
||
|
|
connections.push(conn);
|
||
|
|
activeConn = null;
|
||
|
|
|
||
|
|
// Determine next target
|
||
|
|
let nextHost, nextPort, nextConnectionTimeouts;
|
||
|
|
if (isLast) {
|
||
|
|
// Last jump host, forward to final target
|
||
|
|
nextHost = targetHost;
|
||
|
|
nextPort = targetPort;
|
||
|
|
nextConnectionTimeouts = resolveSshConnectionTimeouts(options);
|
||
|
|
} else {
|
||
|
|
// Forward to next jump host
|
||
|
|
const nextJump = jumpHosts[i + 1];
|
||
|
|
nextHost = nextJump.hostname;
|
||
|
|
nextPort = nextJump.port || 22;
|
||
|
|
nextConnectionTimeouts = resolveSshConnectionTimeouts(nextJump);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Create forward stream to next hop
|
||
|
|
console.log(`[SFTP Chain] Hop ${i + 1}/${jumpHosts.length}: Forwarding to ${nextHost}:${nextPort}...`);
|
||
|
|
currentSocket = await new Promise((resolve, reject) => {
|
||
|
|
let settled = false;
|
||
|
|
const timeout = setTimeout(() => {
|
||
|
|
if (settled) return;
|
||
|
|
settled = true;
|
||
|
|
reject(new Error(`Connection timeout to ${nextHost}:${nextPort}`));
|
||
|
|
}, nextConnectionTimeouts.tcpConnectTimeoutMs);
|
||
|
|
timeout.unref?.();
|
||
|
|
openBoundedForwardOutCallback(conn, '127.0.0.1', 0, nextHost, nextPort, (err, stream) => {
|
||
|
|
if (settled) {
|
||
|
|
try { stream?.end?.(); } catch { /* ignore */ }
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
settled = true;
|
||
|
|
clearTimeout(timeout);
|
||
|
|
if (err) {
|
||
|
|
console.error(`[SFTP Chain] Hop ${i + 1}/${jumpHosts.length}: forwardOut failed:`, err.message);
|
||
|
|
reject(err);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
console.log(`[SFTP Chain] Hop ${i + 1}/${jumpHosts.length}: forwardOut success`);
|
||
|
|
resolve(stream);
|
||
|
|
});
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
// Return the final forwarded stream and all connections for cleanup
|
||
|
|
return {
|
||
|
|
socket: currentSocket,
|
||
|
|
connections
|
||
|
|
};
|
||
|
|
} catch (err) {
|
||
|
|
// Cleanup on error
|
||
|
|
if (activeConn && !connections.includes(activeConn)) {
|
||
|
|
try { activeConn.end(); } catch (cleanupErr) { console.warn('[SFTP Chain] Cleanup error:', cleanupErr.message); }
|
||
|
|
}
|
||
|
|
cleanupSocket(currentSocket);
|
||
|
|
for (const conn of connections) {
|
||
|
|
try { conn.end(); } catch (cleanupErr) { console.warn('[SFTP Chain] Cleanup error:', cleanupErr.message); }
|
||
|
|
}
|
||
|
|
throw err;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Establish an SFTP connection using sudo
|
||
|
|
* @param {SSHClient} client - Connected SSH client
|
||
|
|
* @param {string} password - User password for sudo
|
||
|
|
*/
|
||
|
|
async function connectSudoSftp(client, password) {
|
||
|
|
if (!SFTPWrapper) {
|
||
|
|
throw new Error("SFTP sudo mode is not available on this platform. Please disable sudo mode in host settings.");
|
||
|
|
}
|
||
|
|
|
||
|
|
// Known sftp-server paths to try
|
||
|
|
const sftpPaths = [
|
||
|
|
"/usr/lib/openssh/sftp-server",
|
||
|
|
"/usr/libexec/openssh/sftp-server",
|
||
|
|
"/usr/lib/ssh/sftp-server",
|
||
|
|
"/usr/libexec/sftp-server",
|
||
|
|
"/usr/local/libexec/sftp-server",
|
||
|
|
"/usr/local/lib/sftp-server"
|
||
|
|
];
|
||
|
|
|
||
|
|
console.log("[SFTP] Probing sftp-server path for sudo mode...");
|
||
|
|
|
||
|
|
let serverPath = null;
|
||
|
|
// Try to find the path
|
||
|
|
for (const p of sftpPaths) {
|
||
|
|
try {
|
||
|
|
const result = await executeBoundedSshCommand(client, `test -x ${p}`, {
|
||
|
|
openingTimeoutMs: SCP_PROBE_TIMEOUT_MS,
|
||
|
|
runTimeoutMs: SCP_PROBE_TIMEOUT_MS,
|
||
|
|
maxOutputBytes: 16 * 1024,
|
||
|
|
});
|
||
|
|
if (result.code !== 0) throw new Error('Not found');
|
||
|
|
serverPath = p;
|
||
|
|
break;
|
||
|
|
} catch (e) {
|
||
|
|
// Continue probing
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!serverPath) {
|
||
|
|
// Fallback: try to find it in path or assume standard location
|
||
|
|
console.warn("[SFTP] Could not probe sftp-server, trying default /usr/lib/openssh/sftp-server");
|
||
|
|
serverPath = "/usr/lib/openssh/sftp-server";
|
||
|
|
} else {
|
||
|
|
console.log(`[SFTP] Found sftp-server at ${serverPath}`);
|
||
|
|
}
|
||
|
|
|
||
|
|
return new Promise((resolve, reject) => {
|
||
|
|
// Use sudo -S to read password from stdin
|
||
|
|
// Use -p '' to set a specific prompt we can detect
|
||
|
|
// Use sh -c 'printf SFTPREADY; exec ...' to synchronize the start of sftp-server
|
||
|
|
// We use printf instead of echo to avoid trailing newline which could confuse SFTPWrapper
|
||
|
|
const prompt = "SUDOPASSWORD:";
|
||
|
|
const readyMarker = "SFTPREADY";
|
||
|
|
const readyMarkerBuffer = Buffer.from(readyMarker);
|
||
|
|
// Add -e to sftp-server to log to stderr for debugging
|
||
|
|
const cmd = `sudo -S -p '${prompt}' sh -c 'printf ${readyMarker}; exec ${serverPath} -e'`;
|
||
|
|
|
||
|
|
console.log(`[SFTP] Executing sudo command: ${cmd}`);
|
||
|
|
// Disable pty to ensure clean binary stream for SFTP
|
||
|
|
openBoundedSshExecStreamCallback(client, cmd, { pty: false }, (err, stream) => {
|
||
|
|
if (err) return reject(err);
|
||
|
|
|
||
|
|
// Add stream lifecycle logging
|
||
|
|
stream.on('close', () => console.log("[SFTP] Stream closed"));
|
||
|
|
stream.on('end', () => console.log("[SFTP] Stream ended"));
|
||
|
|
stream.on('error', (e) => console.error("[SFTP] Stream error:", e.message));
|
||
|
|
|
||
|
|
let sftpInitialized = false;
|
||
|
|
let sftp = null;
|
||
|
|
let settled = false;
|
||
|
|
let stdoutBuffer = Buffer.alloc(0);
|
||
|
|
let stderrBuffer = "";
|
||
|
|
let pendingAfterMarker = null;
|
||
|
|
let sftpCreated = false;
|
||
|
|
let initDelayId = null;
|
||
|
|
const timeoutMs = 20000;
|
||
|
|
const timeoutId = setTimeout(() => {
|
||
|
|
if (sftpInitialized || settled) return;
|
||
|
|
settled = true;
|
||
|
|
stream.stderr?.removeListener('data', onStderr);
|
||
|
|
stream.removeListener('data', onStdout);
|
||
|
|
if (initDelayId) clearTimeout(initDelayId);
|
||
|
|
terminateSshExecStream(stream);
|
||
|
|
const error = new Error("SFTP sudo handshake timed out. This may happen if: (1) the password is incorrect, (2) sudo requires a TTY, or (3) the user does not have sudo privileges.");
|
||
|
|
reject(error);
|
||
|
|
}, timeoutMs);
|
||
|
|
timeoutId.unref?.();
|
||
|
|
|
||
|
|
const finalize = (err, result) => {
|
||
|
|
if (settled) return;
|
||
|
|
settled = true;
|
||
|
|
clearTimeout(timeoutId);
|
||
|
|
if (initDelayId) clearTimeout(initDelayId);
|
||
|
|
initDelayId = null;
|
||
|
|
stream.stderr?.removeListener('data', onStderr);
|
||
|
|
stream.removeListener('data', onStdout);
|
||
|
|
if (err) {
|
||
|
|
terminateSshExecStream(stream);
|
||
|
|
reject(err);
|
||
|
|
}
|
||
|
|
else resolve(result);
|
||
|
|
};
|
||
|
|
|
||
|
|
const createSftp = () => {
|
||
|
|
if (sftpCreated) return;
|
||
|
|
sftpCreated = true;
|
||
|
|
try {
|
||
|
|
const chanInfo = {
|
||
|
|
type: 'sftp',
|
||
|
|
incoming: stream.incoming,
|
||
|
|
outgoing: stream.outgoing
|
||
|
|
};
|
||
|
|
sftp = new SFTPWrapper(client, chanInfo, {
|
||
|
|
// debug: (str) => console.log(`[SFTP DEBUG] ${str}`)
|
||
|
|
});
|
||
|
|
|
||
|
|
// Route any remaining channel data directly into the SFTP parser
|
||
|
|
if (client._chanMgr && typeof stream.incoming?.id === "number") {
|
||
|
|
client._chanMgr.update(stream.incoming.id, sftp);
|
||
|
|
}
|
||
|
|
|
||
|
|
sftp.on('ready', () => {
|
||
|
|
sftpInitialized = true;
|
||
|
|
console.log("[SFTP] Protocol ready");
|
||
|
|
finalize(null, sftp);
|
||
|
|
});
|
||
|
|
|
||
|
|
sftp.on('error', (err) => {
|
||
|
|
console.error("[SFTP] Protocol error:", err.message);
|
||
|
|
if (!sftpInitialized) {
|
||
|
|
finalize(err);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
stream.on('end', () => {
|
||
|
|
try { sftp.push(null); } catch { }
|
||
|
|
});
|
||
|
|
} catch (e) {
|
||
|
|
console.error("[SFTP] Initialization failed:", e.message);
|
||
|
|
finalize(e);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
const initSftp = () => {
|
||
|
|
if (sftpInitialized) return;
|
||
|
|
console.log("[SFTP] Sudo success, initializing SFTP protocol...");
|
||
|
|
if (!sftpCreated) createSftp();
|
||
|
|
try {
|
||
|
|
// Start the handshake
|
||
|
|
console.log("[SFTP] Sending INIT packet...");
|
||
|
|
sftp._init();
|
||
|
|
if (pendingAfterMarker && pendingAfterMarker.length > 0) {
|
||
|
|
try {
|
||
|
|
sftp.push(pendingAfterMarker);
|
||
|
|
} catch (pushErr) {
|
||
|
|
console.warn("[SFTP] Failed to push buffered data:", pushErr.message);
|
||
|
|
}
|
||
|
|
pendingAfterMarker = null;
|
||
|
|
}
|
||
|
|
} catch (e) {
|
||
|
|
console.error("[SFTP] Initialization failed:", e.message);
|
||
|
|
finalize(e);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
const onStdout = (data) => {
|
||
|
|
const chunk = Buffer.isBuffer(data) ? data : Buffer.from(data);
|
||
|
|
stdoutBuffer = stdoutBuffer.length > 0 ? Buffer.concat([stdoutBuffer, chunk]) : chunk;
|
||
|
|
const markerIndex = stdoutBuffer.indexOf(readyMarkerBuffer);
|
||
|
|
if (markerIndex !== -1) {
|
||
|
|
const afterMarkerIndex = markerIndex + readyMarkerBuffer.length;
|
||
|
|
if (afterMarkerIndex < stdoutBuffer.length) {
|
||
|
|
pendingAfterMarker = stdoutBuffer.subarray(afterMarkerIndex);
|
||
|
|
}
|
||
|
|
// Found marker, stop listening to stdout here so SFTPWrapper can take over
|
||
|
|
stream.removeListener('data', onStdout);
|
||
|
|
stdoutBuffer = Buffer.alloc(0);
|
||
|
|
|
||
|
|
console.log("[SFTP] SFTPREADY detected, waiting for stream to stabilize...");
|
||
|
|
|
||
|
|
// Delay SFTP initialization to ensure sftp-server is fully started and stream is clean
|
||
|
|
// Increased timeout to 1000ms to be safe
|
||
|
|
initDelayId = setTimeout(() => {
|
||
|
|
initDelayId = null;
|
||
|
|
initSftp();
|
||
|
|
}, 1000);
|
||
|
|
initDelayId.unref?.();
|
||
|
|
} else if (stdoutBuffer.length > 256) {
|
||
|
|
stdoutBuffer = stdoutBuffer.subarray(stdoutBuffer.length - 256);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
const onStderr = (data) => {
|
||
|
|
const raw = Buffer.isBuffer(data) ? data : Buffer.from(String(data));
|
||
|
|
const chunk = raw.subarray(Math.max(0, raw.length - 1024)).toString();
|
||
|
|
// Only log that we received stderr data, not the content (may contain sensitive prompts)
|
||
|
|
stderrBuffer = (stderrBuffer + chunk).slice(-1024);
|
||
|
|
if (stderrBuffer.includes(prompt)) {
|
||
|
|
console.log("[SFTP] Sudo requested password, sending...");
|
||
|
|
// Send password
|
||
|
|
if (password) {
|
||
|
|
stream.write(password + '\n');
|
||
|
|
} else {
|
||
|
|
console.warn('[SFTP] sudo requested password but none provided');
|
||
|
|
stream.write('\n');
|
||
|
|
}
|
||
|
|
stderrBuffer = "";
|
||
|
|
} else if (stderrBuffer.length > 256) stderrBuffer = stderrBuffer.slice(-256);
|
||
|
|
};
|
||
|
|
|
||
|
|
stream.on('data', onStdout);
|
||
|
|
stream.stderr.on('data', onStderr);
|
||
|
|
|
||
|
|
// Error handling
|
||
|
|
stream.on('exit', (code) => {
|
||
|
|
console.log(`[SFTP] Stream exited with code ${code}`);
|
||
|
|
if (!sftpInitialized && code !== 0) {
|
||
|
|
let errorMsg = `SFTP sudo failed with exit code ${code}.`;
|
||
|
|
if (code === 1) {
|
||
|
|
errorMsg += " The password may be incorrect or sudo privileges are denied.";
|
||
|
|
} else if (code === 127) {
|
||
|
|
errorMsg += " sftp-server was not found on the remote system.";
|
||
|
|
}
|
||
|
|
const error = new Error(errorMsg);
|
||
|
|
finalize(error);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
stream.on('error', (error) => {
|
||
|
|
if (!sftpInitialized) finalize(error);
|
||
|
|
});
|
||
|
|
stream.on('close', () => {
|
||
|
|
if (!sftpInitialized) finalize(new Error("SFTP sudo stream closed before protocol initialization"));
|
||
|
|
});
|
||
|
|
stream.on('end', () => {
|
||
|
|
if (!sftpInitialized) finalize(new Error("SFTP sudo stream ended before protocol initialization"));
|
||
|
|
});
|
||
|
|
}, { openingTimeoutMs: 20_000 });
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Open a new SFTP connection
|
||
|
|
* Supports jump host connections when options.jumpHosts is provided
|
||
|
|
*/
|
||
|
|
async function openSftp(event, options) {
|
||
|
|
const connId = options.sessionId || randomUUID();
|
||
|
|
const reuseEndpoint = buildConnectionReuseEndpoint(options, {
|
||
|
|
sftpSudo: Boolean(options.sudo),
|
||
|
|
});
|
||
|
|
let pendingDialCoordination = options._pendingDialCoordination || null;
|
||
|
|
|
||
|
|
const openOnSharedTransport = async (transport, detail = "reusing shared SSH transport") => {
|
||
|
|
const refHolder = {
|
||
|
|
id: connId,
|
||
|
|
__sshLeaseKind: "sftp",
|
||
|
|
webContentsId: event.sender?.id,
|
||
|
|
};
|
||
|
|
acquireConnectionRef?.(refHolder, transport);
|
||
|
|
const reusedClient = createSessionBackedSftpClient(connId, transport.conn, {
|
||
|
|
refHolder,
|
||
|
|
sourceSessionId: options.sourceSessionId || null,
|
||
|
|
});
|
||
|
|
reusedClient.__netcattyEndpointKey = transport.endpointKey || buildEndpointKey(reuseEndpoint);
|
||
|
|
reusedClient.__netcattyTransportManaged = true;
|
||
|
|
const fileProtocol = normalizeFileProtocol(options.fileProtocol);
|
||
|
|
try {
|
||
|
|
sendSftpProgress(event.sender, connId, options.hostname, "connecting", detail);
|
||
|
|
if (fileProtocol === "scp") {
|
||
|
|
await activateScpMode(reusedClient);
|
||
|
|
reusedClient.__netcattySudoMode = false;
|
||
|
|
sftpClients.set(connId, reusedClient);
|
||
|
|
sendSftpProgress(event.sender, connId, options.hostname, "connected", `${detail} (SCP mode)`);
|
||
|
|
return { sftpId: connId, fileProtocol: "scp" };
|
||
|
|
}
|
||
|
|
try {
|
||
|
|
await requireSftpChannel(reusedClient);
|
||
|
|
reusedClient.__netcattyFileProtocol = "sftp";
|
||
|
|
reusedClient.__netcattySudoMode = false;
|
||
|
|
sftpClients.set(connId, reusedClient);
|
||
|
|
sendSftpProgress(event.sender, connId, options.hostname, "connected", detail);
|
||
|
|
return { sftpId: connId, fileProtocol: "sftp" };
|
||
|
|
} catch (sftpErr) {
|
||
|
|
if (fileProtocol === "sftp") throw sftpErr;
|
||
|
|
await activateScpMode(reusedClient);
|
||
|
|
reusedClient.__netcattySudoMode = false;
|
||
|
|
sftpClients.set(connId, reusedClient);
|
||
|
|
sendSftpProgress(event.sender, connId, options.hostname, "connected", `${detail} (SCP mode)`);
|
||
|
|
return { sftpId: connId, fileProtocol: "scp" };
|
||
|
|
}
|
||
|
|
} catch (err) {
|
||
|
|
try { await reusedClient.end(); } catch { /* ignore */ }
|
||
|
|
throw err;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
// Parked / shared transport without a live terminal session: open an SFTP
|
||
|
|
// channel on the registry transport (no second MFA).
|
||
|
|
// Dedicated bulk transfer / restart-resume passes reuseTransport:false so
|
||
|
|
// a transfer never silently attaches to a terminal/parked conn.
|
||
|
|
if (
|
||
|
|
!pendingDialCoordination
|
||
|
|
&& options.reuseTransport !== false
|
||
|
|
&& !options.sudo
|
||
|
|
&& typeof findTransportByEndpoint === "function"
|
||
|
|
&& typeof createSessionBackedSftpClient === "function"
|
||
|
|
) {
|
||
|
|
const transport = findTransportByEndpoint(reuseEndpoint);
|
||
|
|
if (transport?.conn) {
|
||
|
|
try {
|
||
|
|
return await openOnSharedTransport(transport, "reused parked transport");
|
||
|
|
} catch (parkErr) {
|
||
|
|
console.warn(
|
||
|
|
`[SFTP] Parked transport reuse failed for ${connId}; connecting fresh:`,
|
||
|
|
parkErr?.message || String(parkErr),
|
||
|
|
);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (
|
||
|
|
!pendingDialCoordination
|
||
|
|
&& options.reuseTransport !== false
|
||
|
|
&& !options.sudo
|
||
|
|
&& typeof beginTransportDial === "function"
|
||
|
|
) {
|
||
|
|
const coordination = beginTransportDial(reuseEndpoint, { kind: "channel" });
|
||
|
|
if (coordination.role === "reuse" || coordination.role === "join") {
|
||
|
|
try {
|
||
|
|
const transport = coordination.role === "reuse"
|
||
|
|
? coordination.transport
|
||
|
|
: await waitForTransportDial(coordination);
|
||
|
|
return await openOnSharedTransport(transport, "reused coordinated transport");
|
||
|
|
} catch (coordinationErr) {
|
||
|
|
if (coordination.role === "join") throw coordinationErr;
|
||
|
|
console.warn(
|
||
|
|
`[SFTP] Coordinated transport reuse failed for ${connId}; connecting fresh:`,
|
||
|
|
coordinationErr?.message || String(coordinationErr),
|
||
|
|
);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
pendingDialCoordination = coordination;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
try {
|
||
|
|
return await openFreshSftp();
|
||
|
|
} catch (err) {
|
||
|
|
if (pendingDialCoordination) failTransportDial(pendingDialCoordination, err);
|
||
|
|
throw err;
|
||
|
|
}
|
||
|
|
|
||
|
|
async function openFreshSftp() {
|
||
|
|
const client = new SftpClient();
|
||
|
|
client.__netcattyEndpointKey = buildEndpointKey(reuseEndpoint);
|
||
|
|
let freshClientClosed = false;
|
||
|
|
const closeFreshClient = () => {
|
||
|
|
if (freshClientClosed) return;
|
||
|
|
freshClientClosed = true;
|
||
|
|
// A failure after SSH authentication but before registration in
|
||
|
|
// sftpClients/the transport pool otherwise leaves an unreachable live
|
||
|
|
// socket. This is deliberately low-level: there may be no SFTP channel
|
||
|
|
// for ssh2-sftp-client.end() to close yet.
|
||
|
|
try { client.client?.end?.(); } catch { /* ignore */ }
|
||
|
|
try { client.client?.destroy?.(); } catch { /* ignore */ }
|
||
|
|
};
|
||
|
|
|
||
|
|
// Get default keys early to use for both chain and target
|
||
|
|
const defaultKeys = await findAllDefaultPrivateKeysFromHelper();
|
||
|
|
|
||
|
|
// Check if we need to connect through jump hosts
|
||
|
|
const jumpHosts = options.jumpHosts || [];
|
||
|
|
const hasJumpHosts = jumpHosts.length > 0;
|
||
|
|
const hasProxy = hasUsableProxy(options.proxy);
|
||
|
|
const targetConnectionTimeouts = resolveSshConnectionTimeouts(options);
|
||
|
|
|
||
|
|
let chainConnections = [];
|
||
|
|
let connectionSocket = null;
|
||
|
|
const cleanupPendingConnection = () => {
|
||
|
|
for (const conn of chainConnections) {
|
||
|
|
try { conn.end(); } catch (cleanupErr) { console.warn('[SFTP] Cleanup error on connect failure:', cleanupErr.message); }
|
||
|
|
}
|
||
|
|
if (connectionSocket) {
|
||
|
|
try { connectionSocket.end?.(); } catch { /* ignore */ }
|
||
|
|
try { connectionSocket.destroy?.(); } catch { /* ignore */ }
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
// Pre-fetch agent socket (async check for Windows SSH Agent service)
|
||
|
|
// This is used by both jump host chain auth and final host auth
|
||
|
|
const agentSocket = await getAvailableAgentSocket(options.identityAgent);
|
||
|
|
|
||
|
|
// Handle chain/proxy connections
|
||
|
|
if (hasJumpHosts) {
|
||
|
|
console.log(`[SFTP] Opening connection through ${jumpHosts.length} jump host(s) to ${options.hostname}:${options.port || 22}`);
|
||
|
|
|
||
|
|
// Pass default keys to chain connection
|
||
|
|
options._defaultKeys = defaultKeys;
|
||
|
|
|
||
|
|
const chainResult = await connectThroughChainForSftp(
|
||
|
|
event,
|
||
|
|
options,
|
||
|
|
jumpHosts,
|
||
|
|
options.hostname,
|
||
|
|
options.port || 22,
|
||
|
|
connId
|
||
|
|
);
|
||
|
|
connectionSocket = chainResult.socket;
|
||
|
|
chainConnections = chainResult.connections;
|
||
|
|
} else if (hasProxy) {
|
||
|
|
console.log(`[SFTP] Opening connection through proxy to ${options.hostname}:${options.port || 22}`);
|
||
|
|
connectionSocket = await createProxySocket(
|
||
|
|
options.proxy,
|
||
|
|
options.hostname,
|
||
|
|
options.port || 22,
|
||
|
|
{ timeoutMs: targetConnectionTimeouts.tcpConnectTimeoutMs },
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
const keepalivePolicy = resolveConnectionKeepalivePolicy(options);
|
||
|
|
const connectOpts = {
|
||
|
|
host: options.hostname,
|
||
|
|
port: options.port || 22,
|
||
|
|
username: options.username || "root",
|
||
|
|
// Enable keyboard-interactive authentication (required for 2FA/MFA)
|
||
|
|
tryKeyboard: true,
|
||
|
|
timeout: targetConnectionTimeouts.tcpConnectTimeoutMs,
|
||
|
|
readyTimeout: 0,
|
||
|
|
// Keepalive policy:
|
||
|
|
// - positive value: honor it (in seconds, convert to ms)
|
||
|
|
// - explicit 0: truly disabled (host opted out via per-host override —
|
||
|
|
// critical for routers/switches that don't reply to keepalive
|
||
|
|
// @openssh.com and would otherwise be killed by ssh2 after countMax
|
||
|
|
// unanswered probes)
|
||
|
|
// - undefined: legacy caller path, fall back to 10s/3 so an idle SFTP
|
||
|
|
// browse over a NAT doesn't drop (the original #669 protection)
|
||
|
|
keepaliveInterval: keepalivePolicy.keepaliveIntervalMs,
|
||
|
|
keepaliveCountMax: keepalivePolicy.keepaliveCountMax,
|
||
|
|
algorithms: buildSftpAlgorithms(options.legacyAlgorithms, {
|
||
|
|
skipEcdsaHostKey: options.skipEcdsaHostKey,
|
||
|
|
algorithmOverrides: options.algorithmOverrides,
|
||
|
|
}),
|
||
|
|
};
|
||
|
|
connectOpts.hostVerifier = hostKeyVerifier.createHostVerifier({
|
||
|
|
sender: event.sender,
|
||
|
|
sessionId: connId,
|
||
|
|
hostId: options.hostId,
|
||
|
|
hostname: options.hostname,
|
||
|
|
port: options.port || 22,
|
||
|
|
knownHosts: options.knownHosts,
|
||
|
|
verifyHostKeys: options.verifyHostKeys,
|
||
|
|
});
|
||
|
|
|
||
|
|
// Use the tunneled socket if we have one
|
||
|
|
if (connectionSocket) {
|
||
|
|
connectOpts.sock = connectionSocket;
|
||
|
|
// When using sock, we should not set host/port as the connection is already established
|
||
|
|
delete connectOpts.host;
|
||
|
|
delete connectOpts.port;
|
||
|
|
}
|
||
|
|
|
||
|
|
const hasCertificate = typeof options.certificate === "string" && options.certificate.trim().length > 0;
|
||
|
|
|
||
|
|
let identityFile = null;
|
||
|
|
let inlineKey = null;
|
||
|
|
let systemAuthAgent = null;
|
||
|
|
try {
|
||
|
|
systemAuthAgent = hasCertificate
|
||
|
|
? null
|
||
|
|
: await prepareSystemSshAgentForAuth(options, "[SFTP]");
|
||
|
|
identityFile = !options.privateKey && !systemAuthAgent
|
||
|
|
? await loadFirstIdentityFileForAuth({
|
||
|
|
sender: event.sender,
|
||
|
|
identityFilePaths: options.identityFilePaths,
|
||
|
|
hostname: options.hostname,
|
||
|
|
initialPassphrase: options.passphrase,
|
||
|
|
logPrefix: "[SFTP]",
|
||
|
|
onLoaded: (loaded) => {
|
||
|
|
console.log(`[SFTP] Loaded identity file ${loaded.keyPath}`);
|
||
|
|
},
|
||
|
|
onError: (err, keyPath) => {
|
||
|
|
console.warn(`[SFTP] Failed to read identity file ${keyPath}:`, err.message);
|
||
|
|
},
|
||
|
|
})
|
||
|
|
: null;
|
||
|
|
inlineKey = options.privateKey && !systemAuthAgent
|
||
|
|
? await preparePrivateKeyForAuth({
|
||
|
|
sender: event.sender,
|
||
|
|
privateKey: options.privateKey,
|
||
|
|
keyId: options.keyId,
|
||
|
|
keyName: options.keyId || options.username,
|
||
|
|
hostname: options.hostname,
|
||
|
|
initialPassphrase: options.passphrase,
|
||
|
|
logPrefix: "[SFTP]",
|
||
|
|
})
|
||
|
|
: null;
|
||
|
|
} catch (err) {
|
||
|
|
cleanupPendingConnection();
|
||
|
|
throw err;
|
||
|
|
}
|
||
|
|
const effectivePrivateKey = inlineKey?.privateKey || identityFile?.privateKey;
|
||
|
|
const effectivePassphrase = inlineKey?.passphrase || identityFile?.passphrase;
|
||
|
|
|
||
|
|
let authAgent = null;
|
||
|
|
if (systemAuthAgent) {
|
||
|
|
connectOpts.agent = systemAuthAgent;
|
||
|
|
}
|
||
|
|
if (hasCertificate) {
|
||
|
|
authAgent = new NetcattyAgent({
|
||
|
|
mode: "certificate",
|
||
|
|
webContents: event.sender,
|
||
|
|
meta: {
|
||
|
|
label: options.keyId || options.username || "",
|
||
|
|
certificate: options.certificate,
|
||
|
|
privateKey: effectivePrivateKey,
|
||
|
|
passphrase: effectivePassphrase,
|
||
|
|
},
|
||
|
|
});
|
||
|
|
connectOpts.agent = authAgent;
|
||
|
|
} else if (effectivePrivateKey) {
|
||
|
|
connectOpts.privateKey = effectivePrivateKey;
|
||
|
|
if (effectivePassphrase) {
|
||
|
|
connectOpts.passphrase = effectivePassphrase;
|
||
|
|
} else if (isKeyEncrypted(effectivePrivateKey)) {
|
||
|
|
// Key is encrypted but no passphrase provided — prompt the user
|
||
|
|
console.log(`[SFTP] Key is encrypted, requesting passphrase for ${options.hostname}`);
|
||
|
|
const result = await passphraseHandler.requestPassphrase(
|
||
|
|
event.sender,
|
||
|
|
`SSH key for ${options.hostname}`,
|
||
|
|
options.hostname,
|
||
|
|
options.hostname
|
||
|
|
);
|
||
|
|
if (result?.passphrase) {
|
||
|
|
connectOpts.passphrase = result.passphrase;
|
||
|
|
} else {
|
||
|
|
delete connectOpts.privateKey;
|
||
|
|
if (result?.cancelled) {
|
||
|
|
// Clean up any chain/proxy connections and proxy socket opened earlier
|
||
|
|
for (const c of chainConnections) {
|
||
|
|
try { c.end(); } catch {}
|
||
|
|
}
|
||
|
|
if (connectionSocket) {
|
||
|
|
try { connectionSocket.destroy(); } catch {}
|
||
|
|
}
|
||
|
|
// Use "authentication" in the message so the SFTP frontend's
|
||
|
|
// isAuthError() check recognizes this and falls back to password.
|
||
|
|
const err = new Error(`Authentication cancelled — passphrase not provided for ${options.hostname}`);
|
||
|
|
err.level = 'client-authentication';
|
||
|
|
throw err;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (options.password) connectOpts.password = options.password;
|
||
|
|
|
||
|
|
// Build auth handler using shared helper
|
||
|
|
// Use pre-fetched agentSocket (validated async, including Windows service check)
|
||
|
|
const authConfig = buildAuthHandler({
|
||
|
|
authMethod: options.authMethod,
|
||
|
|
requiresMfa: !!options.requiresMfa,
|
||
|
|
privateKey: connectOpts.privateKey,
|
||
|
|
password: connectOpts.password,
|
||
|
|
passphrase: connectOpts.passphrase,
|
||
|
|
agent: connectOpts.agent,
|
||
|
|
username: connectOpts.username,
|
||
|
|
logPrefix: "[SFTP]",
|
||
|
|
skipPasswordMethod: options._skipPasswordMethod === true,
|
||
|
|
defaultKeys: systemAuthAgent && options.identitiesOnly ? [] : defaultKeys,
|
||
|
|
sshAgentSocketOverride: agentSocket,
|
||
|
|
allowAgentFallback: options.useSshAgent !== false,
|
||
|
|
onAuthAttempt: (method) => {
|
||
|
|
sendSftpProgress(event.sender, connId, options.hostname, 'auth-attempt', method);
|
||
|
|
},
|
||
|
|
});
|
||
|
|
applyAuthToConnOpts(connectOpts, authConfig);
|
||
|
|
const sftpAuthPhase = authConfig.authPhase || { hadPartialSuccess: false };
|
||
|
|
let authBanner = "";
|
||
|
|
|
||
|
|
// Create keyboard-interactive handler using shared helper
|
||
|
|
const kiHandler = createKeyboardInteractiveHandler({
|
||
|
|
sender: event.sender,
|
||
|
|
sessionId: connId,
|
||
|
|
hostId: options.hostId,
|
||
|
|
hostname: options.hostname,
|
||
|
|
password: options.password,
|
||
|
|
logPrefix: "[SFTP]",
|
||
|
|
scope: "external",
|
||
|
|
getAuthBanner: () => authBanner,
|
||
|
|
shouldSkipAutoFill: () => shouldSkipKiPasswordAutoFill(sftpAuthPhase),
|
||
|
|
});
|
||
|
|
|
||
|
|
// Add keyboard-interactive listener BEFORE connecting
|
||
|
|
// Wrap to emit progress events for the SFTP connection log
|
||
|
|
client.on("banner", (message) => {
|
||
|
|
authBanner = String(message || "").trim();
|
||
|
|
});
|
||
|
|
client.on("keyboard-interactive", (name, instructions, lang, prompts, finish) => {
|
||
|
|
if (prompts && prompts.length > 0) {
|
||
|
|
sendSftpProgress(event.sender, connId, options.hostname, 'auth-attempt', 'waiting for user input...');
|
||
|
|
}
|
||
|
|
const wrappedFinish = (...args) => {
|
||
|
|
sendSftpProgress(event.sender, connId, options.hostname, 'auth-attempt', 'user responded');
|
||
|
|
finish(...args);
|
||
|
|
};
|
||
|
|
kiHandler(name, instructions, lang, prompts, wrappedFinish);
|
||
|
|
});
|
||
|
|
|
||
|
|
try {
|
||
|
|
// IMPORTANT: We bypass ssh2-sftp-client's connect() method and use the
|
||
|
|
// underlying ssh2 Client directly. This is because ssh2-sftp-client adds
|
||
|
|
// temporary error listeners that reject the entire connect promise on ANY
|
||
|
|
// error, including non-fatal auth errors (e.g. 'Failed to connect to agent'
|
||
|
|
// when ssh2 tries agent auth and falls through to the next method).
|
||
|
|
// By connecting directly, we can filter these non-fatal errors and allow
|
||
|
|
// the auth flow to continue to keyboard-interactive/password/etc.
|
||
|
|
const sshClient = client.client;
|
||
|
|
|
||
|
|
await new Promise((resolve, reject) => {
|
||
|
|
let settled = false;
|
||
|
|
let authReadyTimer = null;
|
||
|
|
const clearAuthReadyTimer = () => {
|
||
|
|
if (!authReadyTimer) return;
|
||
|
|
clearTimeout(authReadyTimer);
|
||
|
|
authReadyTimer = null;
|
||
|
|
};
|
||
|
|
const settle = (fn, val) => {
|
||
|
|
if (settled) return;
|
||
|
|
settled = true;
|
||
|
|
clearAuthReadyTimer();
|
||
|
|
cleanup();
|
||
|
|
fn(val);
|
||
|
|
};
|
||
|
|
|
||
|
|
const onError = (err) => {
|
||
|
|
// Filter out non-fatal authentication errors.
|
||
|
|
// ssh2 sets err.level = 'agent' when agent auth fails — it then
|
||
|
|
// internally calls tryNextAuth() to proceed with the next method.
|
||
|
|
// We must NOT reject here, or the fallback won't execute.
|
||
|
|
if (err.level === 'agent') {
|
||
|
|
console.log('[SFTP] Non-fatal agent auth error (will try next method):', err.message);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
settle(reject, err);
|
||
|
|
};
|
||
|
|
|
||
|
|
const onEnd = () => {
|
||
|
|
settle(reject, new Error('Connection closed before SFTP session was ready'));
|
||
|
|
};
|
||
|
|
|
||
|
|
const onClose = () => {
|
||
|
|
settle(reject, new Error('Connection closed before SFTP session was ready'));
|
||
|
|
};
|
||
|
|
|
||
|
|
const cleanup = () => {
|
||
|
|
sshClient.removeListener('error', onError);
|
||
|
|
sshClient.removeListener('end', onEnd);
|
||
|
|
sshClient.removeListener('close', onClose);
|
||
|
|
sshClient.removeListener('timeout', onTimeout);
|
||
|
|
// Keep a catch-all error listener so post-ready errors (e.g. connection
|
||
|
|
// drops during an active SFTP session) don't become uncaught exceptions.
|
||
|
|
sshClient.on('error', (err) => {
|
||
|
|
console.error(`[SFTP] Post-ready SSH error for ${connId}:`, err.message);
|
||
|
|
});
|
||
|
|
};
|
||
|
|
|
||
|
|
sshClient.on('error', onError);
|
||
|
|
sshClient.on('end', onEnd);
|
||
|
|
sshClient.on('close', onClose);
|
||
|
|
const onTimeout = () => {
|
||
|
|
settle(reject, new Error(`Connection timeout to ${options.hostname}`));
|
||
|
|
try { sshClient.end?.(); } catch { /* ignore */ }
|
||
|
|
try { sshClient.destroy?.(); } catch { /* ignore */ }
|
||
|
|
};
|
||
|
|
sshClient.on('timeout', onTimeout);
|
||
|
|
sshClient.once('connect', () => {
|
||
|
|
runWhenProxyConnectionReady(sshClient._sock, () => {
|
||
|
|
try { sshClient._sock?.setTimeout?.(0); } catch { /* ignore */ }
|
||
|
|
clearAuthReadyTimer();
|
||
|
|
authReadyTimer = setTimeout(
|
||
|
|
() => sshClient.emit('timeout'),
|
||
|
|
targetConnectionTimeouts.authReadyTimeoutMs,
|
||
|
|
);
|
||
|
|
authReadyTimer.unref?.();
|
||
|
|
});
|
||
|
|
});
|
||
|
|
|
||
|
|
sshClient.once('handshake', () => {
|
||
|
|
sendSftpProgress(event.sender, connId, options.hostname, 'authenticating');
|
||
|
|
});
|
||
|
|
|
||
|
|
sshClient.once('ready', () => {
|
||
|
|
clearAuthReadyTimer();
|
||
|
|
cleanup();
|
||
|
|
sendSftpProgress(event.sender, connId, options.hostname, 'connected');
|
||
|
|
|
||
|
|
const fileProtocol = normalizeFileProtocol(options.fileProtocol);
|
||
|
|
|
||
|
|
const finishSftp = (sftp) => {
|
||
|
|
client.sftp = sftp;
|
||
|
|
client.__netcattyFileProtocol = "sftp";
|
||
|
|
resolve();
|
||
|
|
};
|
||
|
|
|
||
|
|
const finishScp = async (reason) => {
|
||
|
|
try {
|
||
|
|
if (reason) {
|
||
|
|
console.warn(`[SFTP] ${reason}; activating SCP mode for ${connId}`);
|
||
|
|
}
|
||
|
|
await activateScpMode(client);
|
||
|
|
resolve();
|
||
|
|
} catch (scpErr) {
|
||
|
|
closeFreshClient();
|
||
|
|
reject(scpErr);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
if (fileProtocol === "scp") {
|
||
|
|
if (options.sudo) {
|
||
|
|
// Forced SCP cannot provide sudo elevation; reject contradictory host data.
|
||
|
|
closeFreshClient();
|
||
|
|
reject(new Error(
|
||
|
|
"Sudo Mode is not supported with File Protocol set to SCP. Disable Sudo Mode or use Auto/SFTP.",
|
||
|
|
));
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
console.log(`[SFTP] Forced SCP mode for connection: ${connId}`);
|
||
|
|
void finishScp(null);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
// When the host asks for sudo SFTP, never silently fall through to
|
||
|
|
// unprivileged SCP on Auto — that would look "connected" without elevation.
|
||
|
|
if (options.sudo) {
|
||
|
|
console.log(`[SFTP] Using sudo mode for connection: ${connId}`);
|
||
|
|
(async () => {
|
||
|
|
try {
|
||
|
|
const sudoPass = options.password || "";
|
||
|
|
const sftpWrapper = await openRequiredSudoSftp({
|
||
|
|
connectSudoSftp,
|
||
|
|
sshClient,
|
||
|
|
password: sudoPass,
|
||
|
|
closeFreshClient,
|
||
|
|
});
|
||
|
|
sftpWrapper.on('close', () => client.end());
|
||
|
|
finishSftp(sftpWrapper);
|
||
|
|
} catch (e) {
|
||
|
|
// Elevation is part of the requested connection contract. A
|
||
|
|
// standard SFTP fallback would look successful while silently
|
||
|
|
// losing access to the requested destination.
|
||
|
|
reject(e);
|
||
|
|
}
|
||
|
|
})();
|
||
|
|
} else {
|
||
|
|
// Open standard SFTP subsystem channel
|
||
|
|
openBoundedSftpChannel(sshClient).then((sftp) => {
|
||
|
|
finishSftp(sftp);
|
||
|
|
}).catch((err) => {
|
||
|
|
if (fileProtocol === "auto") {
|
||
|
|
void finishScp(`SFTP subsystem unavailable (${err.message})`);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
reject(err);
|
||
|
|
});
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
sendSftpProgress(event.sender, connId, options.hostname, 'connecting');
|
||
|
|
try {
|
||
|
|
sshClient.connect(connectOpts);
|
||
|
|
} catch (e) {
|
||
|
|
settle(reject, e);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
// Increase max listeners AFTER connect, when the internal ssh2 Client exists
|
||
|
|
// This prevents Node.js MaxListenersExceededWarning when performing many operations
|
||
|
|
// ssh2-sftp-client adds temporary listeners for each operation, so we need a high limit
|
||
|
|
if (client.client && typeof client.client.setMaxListeners === 'function') {
|
||
|
|
client.client.setMaxListeners(0); // 0 means unlimited
|
||
|
|
}
|
||
|
|
|
||
|
|
// Used by transferBridge to decide whether isolated fast-transfer channels are safe.
|
||
|
|
client.__netcattySudoMode = !!options.sudo && client.__netcattyFileProtocol !== "scp";
|
||
|
|
if (!client.__netcattyFileProtocol) {
|
||
|
|
client.__netcattyFileProtocol = "sftp";
|
||
|
|
}
|
||
|
|
|
||
|
|
// Register dedicated dials in the shared SSH transport registry so
|
||
|
|
// later terminal/SFTP/transfer/port-forward work can borrow without MFA.
|
||
|
|
const sshConn = client.client;
|
||
|
|
if (
|
||
|
|
sshConn
|
||
|
|
&& shouldRegisterFreshSftpTransport(options)
|
||
|
|
&& typeof createTransport === "function"
|
||
|
|
&& typeof borrowTransport === "function"
|
||
|
|
) {
|
||
|
|
try {
|
||
|
|
const refHolder = {
|
||
|
|
id: connId,
|
||
|
|
__sshLeaseKind: "sftp",
|
||
|
|
webContentsId: event.sender?.id,
|
||
|
|
};
|
||
|
|
const transport = createTransport({
|
||
|
|
conn: sshConn,
|
||
|
|
chainConnections,
|
||
|
|
endpoint: reuseEndpoint,
|
||
|
|
});
|
||
|
|
borrowTransport(transport, {
|
||
|
|
kind: "sftp",
|
||
|
|
holder: refHolder,
|
||
|
|
leaseId: `sftp:${connId}`,
|
||
|
|
meta: { source: "openSftp-dedicated" },
|
||
|
|
});
|
||
|
|
client.__netcattyRefHolder = refHolder;
|
||
|
|
client.__netcattyTransportManaged = true;
|
||
|
|
if (pendingDialCoordination) {
|
||
|
|
completeTransportDial(pendingDialCoordination, transport);
|
||
|
|
}
|
||
|
|
// Chain lifetime is owned by the transport; do not double-end on close.
|
||
|
|
chainConnections = [];
|
||
|
|
} catch (regErr) {
|
||
|
|
if (pendingDialCoordination) {
|
||
|
|
failTransportDial(pendingDialCoordination, regErr);
|
||
|
|
}
|
||
|
|
console.warn(
|
||
|
|
`[SFTP] Failed to register dedicated transport for ${connId}:`,
|
||
|
|
regErr?.message || String(regErr),
|
||
|
|
);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
sftpClients.set(connId, client);
|
||
|
|
|
||
|
|
// Store jump connections for cleanup when SFTP is closed (legacy path
|
||
|
|
// only — transport-managed connections park chain on the registry).
|
||
|
|
if (chainConnections.length > 0 && !client.__netcattyTransportManaged) {
|
||
|
|
jumpConnectionsMap.set(connId, {
|
||
|
|
connections: chainConnections,
|
||
|
|
socket: connectionSocket
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
console.log(`[SFTP] Connection established: ${connId} (protocol=${client.__netcattyFileProtocol})`);
|
||
|
|
return { sftpId: connId, fileProtocol: client.__netcattyFileProtocol };
|
||
|
|
} catch (err) {
|
||
|
|
// Cleanup jump connections on error
|
||
|
|
cleanupPendingConnection();
|
||
|
|
closeFreshClient();
|
||
|
|
if (shouldRetrySftpKeyboardInteractiveFirst(options, authConfig, err)) {
|
||
|
|
console.log("[SFTP] Password auth removed keyboard-interactive; retrying with keyboard-interactive first...");
|
||
|
|
return openSftp(event, {
|
||
|
|
...options,
|
||
|
|
_skipPasswordMethod: true,
|
||
|
|
_pendingDialCoordination: pendingDialCoordination,
|
||
|
|
});
|
||
|
|
}
|
||
|
|
if (pendingDialCoordination) failTransportDial(pendingDialCoordination, err);
|
||
|
|
throw err;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return { connectThroughChainForSftp, connectSudoSftp, openSftp };
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
module.exports = {
|
||
|
|
createOpenConnectionApi,
|
||
|
|
createBoundedProbeSignal,
|
||
|
|
shouldRegisterFreshSftpTransport,
|
||
|
|
SCP_PROBE_TIMEOUT_MS,
|
||
|
|
};
|