2 Commits

Include renames

Author	SHA1	Message	Date
Codeman maintainer	e49c48145b	fix(files): fail closed on remote symlinks, guard PUT for remote cases, bound ssh fan-out ... Follow-up to #421 (remote-case file reads over ssh), addressing the review. Symlink escape on a host without `readlink -f` (blocker). The probe's portable fallback canonicalized only the directory chain and returned the final component unresolved, so on macOS < 12.3 `ws/notes.txt -> ~/.ssh/id_rsa` came back as `.../ws/notes.txt` (with the target's size), passed every containment and blocklist check that runs on `realPath`, and `cat` followed the link. The fallback now walks the directory chain with `cd -P`/`pwd -P` and follows the LAST component with plain `readlink` for a bounded number of hops, and anything it cannot fully resolve (a loop, a readlink failure, the hop cap) is reported with an `x` marker that parses as null, i.e. 404. It never returns the unresolved string. Measured on a real /bin/sh with `readlink -f` shadowed: the pre-fix script reports `/ws/notes.txt`, the fixed one `/secret/id_rsa`; both branches (native and fallback) now agree. `PUT /api/sessions/:id/file-content` never had the remote guard the PR described. It sits ahead of `validateSessionFilePath`, which resolves against the LOCAL filesystem, because with a same-named directory on the Codeman host (an sshfs mount of the remote tree, the documented stop-gap) the write landed on the local twin while the viewer believed it edited the remote file. ssh fan-out is bounded. `src/remote-ssh-limiter.ts` is a document-conversion-limiter-shaped semaphore (default 4, env `CODEMAN_MAX_REMOTE_FILE_SSH`) around every probe and buffered read; the attachment-history list resolves its whole history in ONE batched probe (`probeRemoteAttachmentHistory`, threaded into `registerExternalAttachment({remoteProbes})` so the guards run unchanged) instead of one handshake per entry; and probes chunk at 40 paths because the whole script is one argv string. Terminal output in a remote session is written on the remote host, so a prompt-injected agent printing hundreds of `codeman://attach` links forked one ssh per link, each holding a 20 s timeout, and a 100-entry history re-listed on every attachment:detected tripped OpenSSH's default MaxStartups. Streams are deliberately not counted (one per browser request, held for a whole playback, and gated behind a counted probe anyway). Smaller items from the same review: probe records are NUL-terminated and index-keyed after a leading NUL (a newline in a filename can no longer shift the alignment, and the banner is fenced off without last-N-lines guessing); size comes from `stat -c %s || stat -f %z`; the three IO functions refuse under VITEST instead of opening a connection; an unreachable host now reads as unknown (missing: false) for detected AND external history entries, where external used to fold its 502 into missing; a client that aborted during the guard probe has its body's ssh child reaped (`reply.raw.destroyed` is checked before the close listener is attached); `describeExecError` never returns Node's `Command failed: <ssh line>` message, which carried the identity path and the probe script into a 502 body; and the docs note that `isSensitivePath`'s three home-anchored entries resolve against the Codeman host's home, not the remote one. Tests: the probe script runs on a real /bin/sh with a `readlink` shim that rejects `-f` (the escape, a relative chain through a symlinked directory, a loop, a newline filename, banner chatter that itself looks like a record), the limiter's cap and FIFO order, and route tests for the PUT guard (local twin untouched, no connection), the single batched history probe, the unreachable-host alignment and the aborted-client reap. All four route tests fail against the pre-fix file-routes.ts. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>	2026-09-14 23:42:06 +02:00
Randalix	013a5d9cc8	fix(files): read remote-case file previews and downloads over ssh ... A remote case's workingDir is an absolute path on the remote host, but the file read routes resolved it with local `fs`: `validateSessionFilePath`'s realpathSync fails for a path that does not exist on the Codeman host, so every preview of an agent-written file answered "File not found" (#415). Add src/remote-files.ts as the single remote-read layer, built on the same buildSshConnectionArgs() the launch uses: - remoteProbePaths(): ONE round trip returning realpath + stat for the requested path AND the workspace root, so containment is checked against a remotely canonicalized root (a symlinked remotePath is ordinary). - remoteCreateReadStream(): streams the body (cat, or tail -c +N | head -c L for a Range) with nothing buffered in memory, and reaps the ssh child when the response ends so an aborted download cannot orphan it. - remoteReadFile(): bounded read for file-content. file-raw, file-content, file-preview and file-thumbnail now share one local/ remote target resolution. Guards keep their local strength: lexical pre-check, remote realpath, workspace containment, sensitive-path blocklist, and the size cap applied to the remote size before any bytes are read. An unreachable host answers 502 with the remote reason instead of a misleading 404. Nothing is ever copied to the Codeman host and there is NO local fallback (an sshfs mount of the same tree must not shadow the remote bytes). Deliberately unchanged: writes (edit=1 / PUT now answer 400 explicitly while the viewer hides its Edit affordance), office previews, thumbnails, file tree, picker, external attachment registration and tail-file stay local-only.	2026-09-14 14:54:41 +02:00