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thePR0M3TH3ANandClaude Fable 5
55879eaa1b
Continues the security-review fixes. Durability and concurrency: - Vault, config, fingerprint-registry and parent-seed writes are now atomic: temp file in the same directory, fsync, rename, then an fsync of the directory. Previously the target was truncated and rewritten in place, so a crash could destroy the vault. - The lock now spans the whole read-modify-write cycle, not just the write. Serializing writes alone still lost changes -- two commands each read the same index, mutated their copy, and wrote in turn. Every mutating command goes through mutateVault(), which holds the lock from open to save. A test runs five concurrent writers and asserts all five entries survive. - 0600 is now enforced on existing files too: writeFile's mode argument only applies on creation, so a loosened vault stayed loosened. - The index is schema-validated before it can reach disk. Path handling: - Profile fingerprints are validated (16 uppercase hex) before being used in any path, and removeProfile additionally checks the resolved directory still sits directly under the app directory. A tampered registry could otherwise have steered a recursive delete elsewhere. - Malformed entries in fingerprints.json are dropped on read. Restore semantics: - `nostr restore` merges remote state into the local vault instead of replacing it. Replacing silently discarded entries created since the last sync; that now requires --replace --yes, and any overwritten vault is copied aside first. - Deltas are bound to the manifest they extend (filtered on the e tag, and re-checked locally), so a relay cannot replay a validly-signed delta from another snapshot lineage into a restore. - Manifest selection breaks created_at ties by relay order, so a same-second republish cannot leave a restore on a stale snapshot. - mergeIndexPayloads gained an index0 option. The default still refuses to merge populated Python atlas state rather than drop it; restore uses preserve-current, keeping the local block verbatim, because Python recomputes canonical views on load and the default would block every restore into a Python-created profile. 193 core + 69 CLI tests green; 36/36 cross-implementation checks green. Co-Authored-By: Claude Fable 5 <[email protected]>