* fix(gallery): block password form in Instagram in-app browser (#654)
Field reports show gallery password login still failing inside
Instagram's IAB after the #656 input-attribute/trim defenses. Three
changes:
- Replace the advisory amber banner with a red blocking state: the
password form is hidden in the Instagram IAB and replaced with
platform-specific "open in external browser" instructions plus a
copy-link button (clipboard API with execCommand fallback). A
"try anyway" link restores the form as an escape hatch.
- Stop masking non-password failures as "incorrect password": a request
that never got a response (offline, webview killed it) now reports a
connection error, and a reCAPTCHA 400 reports a verification failure —
both previously fell through to the wrong-password message and sent
guests chasing the wrong cause.
- Strip invisible Unicode (zero-width chars, word joiner, BOM, soft
hyphen) from the submitted password in addition to trimming — these
ride along when the password is copy-pasted out of a chat app and fail
byte-exact bcrypt compare server-side.
* fix(gallery): retry login with typed password + honor execCommand result (#654)
Codex review round 1:
- Stored passwords can legitimately contain the invisible code points the
sanitizer strips (e.g. ZWJ emoji sequences) — creation paths don't
normalize. On a 401 where the sanitized form differs from the typed
(trimmed) input, retry once with the typed value. Skipped when a
reCAPTCHA token is in play (single-use).
- document.execCommand('copy') signals failure via its return value, not
by throwing — only show "Link copied" when it returns true.
* fix(gallery): move invisible-char password fallback server-side (#654)
Codex review round 2: the client-side retry either burned the single-use
reCAPTCHA token (making exotic-but-valid passwords impossible to enter
with reCAPTCHA on) or burned failed-attempt lockout quota on every
rescued login. Doing the fallback as a second bcrypt compare inside the
same gallery/verify request eliminates both: exact bytes are compared
first (stored passwords containing e.g. ZWJ emoji keep working), the
sanitized form only on mismatch, and trackFailedAttempt only fires when
both fail. Frontend goes back to plain trim-on-submit; the client-side
sanitizer util and retry are removed. 7 integration tests pin the
contract.
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Co-authored-by: Paul Nothaft <paul@MacStudio-von-Paul.local>
Paul Nothaft
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