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4c7f001cab #215: trusted reverse-proxy header / mTLS client-certificate path
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For perimeters that authenticate before the application (ADR 0021 §4).
Off unless BOTH AUTH_PROXY_HEADER and AUTH_PROXY_TRUSTED_PEERS are set —
nothing about the header is guessed. The peer check runs against the TCP
peer address only (a forwarded header is attacker-influenced): a request
carrying the header from any other peer is rejected outright and audited
as auth.proxy_rejected (catalogue v1.4) — that is a spoof attempt, not a
misconfiguration — even when a valid session cookie rides along. From a
trusted peer the header IS the identity; a session cookie never
escalates beyond it; with the feature off the header is inert.

Mapping is explicit (AUTH_PROXY_MAP: username or e-mail); deliberately
no just-in-time creation — the header carries no verified address. The
mTLS variant (AUTH_PROXY_MODE=mtls-dn) maps the configured attribute
(default CN) out of the certificate subject DN the TLS terminator
forwards, under the same peer rules. Session-less proxy requests key the
read trail per user (user:<id>).

The trust boundary is stated in security.md (the section an assessor
reads closest), the VS-NfD security documentation and the hardening
guide's deploy table. Tests cover all four decisions: off = inert,
trusted peer authenticates (username and DN mapping), untrusted peer
rejected + audited, no escalation past a session cookie.

Refs #215.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AUtYMxwTCMHG9mVHnwbFg8
2026-07-31 12:50:09 +02:00
05a979bac3 #222: read-access trail for classified pages
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Instrument every full-content read channel for pages with
classification = vs_nfd (ADR 0023, variant A): SPA state fetch and read
rendering, public JSON content, no-JS shell, expanded embeds, public API
GET (incl. the MCP read_page path and write echoes), attachment download
under the #212 effective classification, all export shapes (markdown,
pond ZIP, account data export, queued docx/odt/pdf at enqueue), and
collab-token issuance as the api-side proxy for the WS join.

Events land in the new read_events table (no FKs — evidence survives
page purges and hard user deletions) with actor, session key
(session:/token:/job:/anon), page, pond, channel and the classification
at read time. Recording failures are NOT swallowed: a failed write
aborts the read (hard failure, the deliberate contrast to AuditService —
decision recorded in ADR 0023 and security.md §Logging, together with
the recorded residuals: content fragments and feeds).

One e2e test per channel proves both the event and its absence for
unclassified pages, plus the hard-failure semantics.

Refs #222.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AUtYMxwTCMHG9mVHnwbFg8
2026-07-31 12:12:55 +02:00