fix: harden event stream auth with per-org IP management (AAP-76184) - #1649
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fix: harden event stream auth with per-org IP management (AAP-76184)#1649AlexSCorey wants to merge 4 commits into
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📝 WalkthroughWalkthroughThe event-stream API now uses timing-safe credential comparisons and cache-backed IP blacklisting. It tracks authentication failures and invalid UUID attempts with configurable thresholds, windows, and blacklist duration. ChangesEvent-stream security controls
Estimated code review effort: 3 (Moderate) | ~25 minutes Mergeability Score: 🟠 High · up to The authentication hardening currently allows untrusted forwarded addresses to poison blocking state and can make failed authentication on one stream block access to all streams; valid Basic credentials may also be rejected. The PR is not ready to merge until these authentication and availability issues are corrected. Sequence Diagram(s)sequenceDiagram
participant Client
participant ExternalEventStreamView
participant BlacklistManager
participant CredentialAuthentication
participant DjangoCache
Client->>ExternalEventStreamView: Submit event-stream request
ExternalEventStreamView->>BlacklistManager: Check client IP
BlacklistManager->>DjangoCache: Read blacklist entry
ExternalEventStreamView->>CredentialAuthentication: Authenticate request
CredentialAuthentication-->>ExternalEventStreamView: Return success or AuthenticationFailed
ExternalEventStreamView->>BlacklistManager: Record invalid UUID or authentication failure
BlacklistManager->>DjangoCache: Update counters and blacklist TTL
Suggested reviewers: 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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Actionable comments posted: 3
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Verify each finding against current code. Fix only still-valid issues, skip the
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Inline comments:
In `@src/aap_eda/api/event_stream_authentication.py`:
- Line 99: Update TokenAuthentication.authenticate and
BasicAuthentication.authenticate so malformed non-ASCII credentials cannot
escape as TypeError from hmac.compare_digest; compare encoded byte operands or
catch and convert the TypeError to AuthenticationFailed, preserving the existing
authentication-failure handling.
In `@src/aap_eda/api/views/external_event_stream.py`:
- Around line 294-309: Update _check_rate_limit and _record_failure to use a
shared production-safe cache backend with an atomic check-and-increment or
reservation for the per-event-stream/client key, preventing concurrent requests
from bypassing the threshold or overwriting increments. Ensure production cache
configuration does not use process-local LocMemCache while preserving the
existing failure threshold and window.
- Around line 288-292: Update _get_client_ip to use REMOTE_ADDR whenever
EVENT_STREAM_REQUIRE_TRUSTED_PROXY is disabled, ignoring caller-supplied
X-Forwarded-For values. When trusted-proxy validation is enabled, only use
X-Forwarded-For after the existing trusted-proxy logic overwrites or validates
it, otherwise fall back to REMOTE_ADDR.
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ℹ️ Review info
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Configuration used: Organization UI
Review profile: CHILL
Plan: Enterprise
Run ID: 00475108-5c07-4347-b03a-128f64c7cac3
📒 Files selected for processing (2)
src/aap_eda/api/event_stream_authentication.pysrc/aap_eda/api/views/external_event_stream.py
Codecov Report❌ Patch coverage is
@@ Coverage Diff @@
## main #1649 +/- ##
==========================================
+ Coverage 93.39% 93.44% +0.05%
==========================================
Files 247 255 +8
Lines 11698 11962 +264
==========================================
+ Hits 10925 11178 +253
- Misses 773 784 +11
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Actionable comments posted: 1
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
Inline comments:
In `@src/aap_eda/api/event_stream_authentication.py`:
- Around line 159-161: Update the credential payload construction in the
authentication method containing user_pass to format the Basic authentication
value as username followed directly by a colon and password, with no intervening
space. Leave the base64 encoding and hmac.compare_digest constant-time
comparison unchanged.
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Inline comments:
In `@src/aap_eda/api/blacklist.py`:
- Around line 42-69: Update record_auth_failure to accept the stream UUID
alongside client_ip, scope both the authentication-failure counter and blacklist
key to that stream, and preserve global blacklist handling only for invalid UUID
probes. Ensure callers and tests pass the stream identifier so the per-stream,
per-IP policy remains intact.
In `@src/aap_eda/api/views/external_event_stream.py`:
- Around line 303-309: Call _validate_trusted_proxy_header(request) before
_get_client_ip in the event-stream request flow, ensuring proxy validation
occurs before check_blacklist or record_invalid_uuid can mutate blacklist state;
preserve the existing invalid-UUID handling afterward.
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src/aap_eda/api/blacklist.pysrc/aap_eda/api/event_stream_authentication.pysrc/aap_eda/api/views/external_event_stream.pysrc/aap_eda/core/utils/crypto/__init__.pysrc/aap_eda/settings/defaults.pytests/unit/test_blacklist.pytests/unit/test_timing_safe_compare.py
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✅ Test Results - PASSEDSummary
Pass Rate: 75.8% |
Replace timing-vulnerable != comparisons with hmac.compare_digest() in TokenAuthentication and BasicAuthentication. Add per-stream per-IP rate limiting on failed authentication attempts to prevent brute-force credential recovery.
…ivalency in a util function
Introduce EventStreamSetting model (one per organization) to replace static Dynaconf settings for IP allowlists, blocklists, and auto- blacklist configuration. Adds a CRUD API endpoint with a clear-blocked action, Django signal-based cache invalidation, and per-org IP policy enforcement in the external event stream view. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Remove threshold-based auto-blacklisting in favor of per-org IP allowlists. Blocked IPs are now tracked in the DB for admin visibility — admins can promote them to the allowlist or remove them. Adding an IP to the allowlist auto-removes it from blocked.
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Summary
cache.incr(), timing-safe credential comparison viahmac.compare_digest, rightmost XFF IP extraction, and proxy validation before blacklist checks.EventStreamSettingmodel (one per organization) with IP allowlists, admin-managed blocklists, and configurable auto-blacklist thresholds. CRUD API at/v1/event-stream-settings/withclear-blockedaction. Djangopost_savesignal invalidates cache on settings change. Falls back to global Dynaconf defaults when no DB row exists.Key design decisions
OneToOneFieldto Organization for one-settings-row-per-orgBlacklistManager.check_ip_policy()checks blocked IPs, auto-blacklist cache, then allowlistes_blacklist:{org_id}:{ip}) for org isolationipaddress.ip_address()validationTest plan
tests/unit/test_blacklist.py— existing global blacklist tests still passtests/unit/test_blacklist_org_aware.py— per-org threshold, org isolation, allowlist/blocklist enforcementtests/unit/test_event_stream_setting_model.py— cache helper, signal invalidation, Dynaconf fallbacktests/integration/api/test_event_stream_setting.py— CRUD, validation, clear-blocked, duplicate org rejectiontest_event_stream*.pytests unbrokenEDA_MODE=testingorEDA_EVENT_STREAM_BLACKLIST_THRESHOLD=0Jira
AAP-76184
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