* [Security] Add challenge-response auth with scrypt verifiers and stop storing plaintext passwords
Challenge-response authentication: the client derives a scrypt verifier
(RFC 7914, EVP_PBE_scrypt, N=32768, r=8, p=1) and authenticates with
HMAC-SHA256(key, nonce), so neither the password nor its hash is
transmitted. The stored format becomes
"$scrypt$<n>$<r>$<p>$<salt>$<verifier>" and Response_PasswordSalt
now carries the cost parameters. Strict servers only accept scrypt
verifiers; legacy accounts are migrated after a successful login.
Fix#344 for challenge-response servers: a saved profile stores the
derived verifier under the password key instead of the plaintext password.
The connect dialog loads it without revealing it, autoconnect passes it
through, the change-password dialog no longer prefills the old password
field with it, and the client only persists the verifier when
"Save password" is checked.
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* [Security] Harden credential format acceptance and challenge nonce validation
* [Security] Refuse KDF downgrade; trim profile name and warn on silent credential drop
* [Security] Add SupportsAll ServerOptions enumerator to fix enum validation assert
The server advertised both SupportsPasswordHash (1) and
SupportsChallengeResponseAuth (2) via a bitwise-OR that produced the
value 3, which no enumerator declared. Protobuf's proto2 enum
validation rejects the value in _internal_set_server_options, crashing
servatrice on the debug assertion. Add a SupportsAll = 3 enumerator with
an identical wire value so the bitmask reads unchanged while the value
is now a documented, valid member of the enum.
* [Security] Normalize username when issuing challenge nonce
cmdRequestPasswordSalt bound the challenge nonce to the raw, un-simplified
username while cmdLogin verifies it against the simplified name. A user
who typed leading or trailing whitespace in the username box would be
silently rejected during challenge-response login even with the correct
password. Simplify at the nonce-issuing site so both commands agree on
the normalized name.
Also drive-by formatting: collapse the now single-expression
serverOptions initializer onto one line.
* [Security] Keep an encrypted legacy password backup for old-client logins
Migrating an account to scrypt stranded pre-challenge clients, which can
only present the legacy salt+hash: after migration the server served them
a scrypt salt they cannot use, so the only recovery was a password reset.
When security/legacy_backup_key is configured (64 hex chars,
openssl rand -hex 32), submitPasswordVerifier now seals the legacy
credential with AES-256-GCM under that key before overwriting the row,
storing it in password_legacy_backup with the time it was last used. Old
clients keep working: cmdRequestPasswordSalt serves the backup's 16-char
salt in password_salt so they can derive the legacy hash they were
always able to compute, while new clients derive the verifier from the
new scrypt_salt field, which always carries the verifier salt. The
non-challenge login path accepts the plaintext or legacy hash against
the decrypted backup and refreshes its window; a migrated row with no
usable backup fails closed.
Backups age out so a database dump taken after the window closes never
carries a crackable legacy hash: getUsableLegacyBackup purges on first
use past security/legacy_backup_ttl_days (default 90, clamped 1..3650),
and a six-hourly sweep drops backups idle accounts never touch.
changeUserPassword clears the backup since a new credential invalidates
it. Without a configured key nothing is sealed or purged, so a
temporarily missing key cannot destroy existing backups.
The AAD is the simplified user name on both sides, sealing the blob to
its row so it cannot be moved between accounts. Sealing failures
degrade to the previous lockout behaviour rather than blocking
migration. The columns extend the unmerged 0036->0037 migration, so the
schema version stays 37.
* [Security] Address review: proto compat, plaintext verify, AAD case, strict scope
Fix the two blockers and follow-ups from the 2026-10-16 review:
- Advertise challenge-response in a new supports_challenge_response
field instead of the ServerOptions enum and drop SupportsAll:
proto2 enums are closed, so already-released clients parsed
server_options = 3 as NoOptions and fell back to plaintext
passwords. server_options stays exactly SupportsPasswordHash
on the wire; old clients ignore the new field.
- Verify a plaintext password directly against a migrated scrypt
row with verifyPassword() so email changes (cmdAccountEdit)
and old clients sending password keep working without a
legacy backup key. Pre-hashed values are still checked
against the backup, and its TTL window is refreshed only
when the backup is what actually matched.
- Use the stored row name as the AES-GCM AAD on both seal
and open so a login whose case differs from the stored
name (utf8mb4_unicode_ci) still opens its backup.
- Require challenge-response in strict mode only for
registered SQL accounts (userExists gate), leaving
guest/unregistered logins and none/password auth
methods unaffected.
- Document in servatrice.ini.example that a captured
legacy hash can take over a not-yet-migrated account
and that strict only constrains registered SQL
accounts. Schema version is 38.
* [Security] Raise legacy backup TTL default to 180 days
Gives operators and slow-to-upgrade users a longer downgrade
window for pre-challenge clients before unused encrypted
legacy password backups age out.
* [Security] Fix servatrice.cpp formatting per clang-format-18
* [Security] Add missing forward declaration for Command_SubmitPasswordVerifier
The cmdSubmitPasswordVerifier declaration references the proto-generated
type, which otherwise does not name a type in this header and breaks
every C++ build.
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Co-authored-by: Lukas Brübach <Bruebach.Lukas@bdosecurity.de>
Co-authored-by: BruebachL <bruebachl@cockatrice.example>
* [Server/Client/Protocol] Reporting users + moderation queue functionality
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* CI Fix
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* CI Fix
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* [Protocol] Add moderation investigation commands
Adds the protocol layer for the moderation investigation suite:
- Command_GetUserSessions/GetUserAlts/GetModeratorLastLogins/ResetUserPassword/RemoveUserAvatar (1013-1017)
- Response extensions 1215-1219 with ServerInfo messages for sessions, alts, and staff logins
- last_login on Response_ReportUserInfo and warning_il on Response_WarnList
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* [Utility] Add warning categories parser with infraction levels
Parses the server's 'officialwarnings' setting (comma-separated, optional
'|IL' suffix) into WarningCategory structs so the client can display the
infraction level of each warning category. Includes GTest coverage.
* [Server] Add moderation investigation tools
Implements the server side of the moderation suite:
- getUserSessions/getUserAlts/getModeratorLastLogins/removeUserAvatar DB methods
- Handlers for all five new commands with audit records (PASSWORD_RESET,
REMOVE_USER_AVATAR); password resets return a generated temporary password
- cmdGetWarnList now reports per-category infraction levels from the
officialwarnings setting; cmdReportUserInfo reports last_login
- Update servatrice.ini.example with the warning taxonomy
- Password/avatar mutations report RespNameNotFound when the user does not exist
* [Client] Add moderation tab with investigate, password reset, and avatar removal
- New Moderation tab: search a user to show account info, alternate
accounts, login sessions, and staff last logins; actions to reset the
user's password (shows the generated temporary password) and remove the
user's avatar
- 'Investigate user' entry in the user context menu opens the tab pre-loaded
for that user
- Warning dialog shows the infraction level of each warning category
- Tab wired into TabSupervisor with a moderator-gated menu action, shortcut,
and tabs.ini persistence (default closed)
* [Server/Client/Protocol] Address PR #7091 review: security, bug, and perf fixes
Security:
- Promote RESET_USER_PASSWORD to admin-only dispatch (was moderator-accessible)
- Reject password reset on users with equal/higher privilege than caller
- Notify affected user via Event_NotifyUser::CUSTOM when password is reset
- Add server-side category whitelist for reports
- Drop reporter name fallback in comment/details authorization (ID-only)
- Force password change: new DB column + login enforcement + client disconnect
Bugs:
- XSS via QTextEdit::append() → insertPlainText() in report tab and utils
- allNotified initialized to true even with empty recipients list
- Warning combo box: use currentData() instead of baked-in display text
- Report resolution now records who resolved (resolved_by column + audit)
Performance:
- IP-correlation subquery: add 6-month window + LIMIT 200
- getUserSessions: clamp limit to 500
Non-blocking:
- Palette-aware colors in report_utils.cpp (dark/light mode)
- Report list pagination: offset/limit fields + total_count in response
- SessionCommand enum gap comment for reserved values 1201-1203
Schema: 36→37 (force_password_change), 37→38 (resolved_by)
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* Fix macOs pedantry
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Co-authored-by: Lukas Brübach <Bruebach.Lukas@bdosecurity.de>
* [Room] Additionally show a tab for friends and ignored users instead of just all online users.
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* [Room][UserList] Introduce style delegate for user list
- Allow users to set a card name and parameters as their background banner
- Allow mods to white/blacklist cards
- Allow toggling back to the old display style
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* Right checkstate.
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* Utility for test.
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* Lint.
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* Algorithm for sql schema migration
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* Use {prefix}, bound card name, return errors.
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* Convert queue to while loop.
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* Hover popup.
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* More granular signals, popup for user info.
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Co-authored-by: Lukas Brübach <Bruebach.Lukas@bdosecurity.de>
