When a supervisor-approved safe-token exactly matched an env secret
(Pass 1), Passes 2 & 3 (alnum projection) still ran and re-blocked on
the same value. Track whether any variant was found-and-approved and
skip the projection passes for that secret in that case.
EgressPlan gains a `canary: str` field (default "") populated in Egress.prepare()
using secrets.token_urlsafe(32). Each launched bottle:
- sidecar receives EGRESS_TOKEN_CANARY=<value> (literal env entry, scanned by
existing known-secrets detector without any detector code changes)
- agent receives BOT_BOTTLE_CANARY=<value> (visible fake secret that signals
exfiltration with zero false positives if it appears in outbound traffic)
Docker compose and macos-container backends updated; smolmachines shares docker
compose and so picks this up automatically. Unit tests cover canary uniqueness,
detection via scan_known_secrets, and EgressPlan backward-compat default.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- _alnum_projection(): strip non-alphanumeric chars for separator-injection detection
- scan_known_secrets() gains two extra passes per secret after exact-variant matching:
alnum-projection exact match (catches hyphens/spaces between secret chars) and a
sliding-window partial-match scan (catches chunked substrings ≥ PARTIAL_MATCH_MIN_LEN)
- scan_known_secrets() accepts sensitive_prefixes param (default ("EGRESS_TOKEN_",))
so redact_tokens and call-sites can extend the scanned env-var prefix set
- scan_entropy() warn-only detector flagging windows with Shannon entropy ≥ 5.5 bits/char
- "entropy" added to OUTBOUND_DETECTOR_NAMES; scan_outbound opts it in only when
explicitly listed in dlp.outbound_detectors (never part of the default "all" set)
- scan_outbound reads BOT_BOTTLE_SENSITIVE_PREFIXES from environ to extend
scan_known_secrets beyond EGRESS_TOKEN_* without schema changes
- Binary bodies decoded via latin-1 fallback (bijective byte↔codepoint) instead
of utf-8 errors=replace, preserving ASCII secret strings in binary payloads
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
didericis-codex
didericis-claude