Files
mimic-big/backend
knacky 9f75f119f0 feat(backend): engagement members + audit log viewer (sprint 2)
Engagement members on `/api/v1/engagements/<eid>/members`:
- `GET` lists members (flat array, ordered by `added_at`). Permission
  `ENGAGEMENT_READ`.
- `POST` adds a member. Permission `ENGAGEMENT_MEMBER_MANAGE`. Body
  `{user_id, role?}`; `role` defaults to `"member"` (D-017). Returns 201
  with `EngagementMemberRead`, 404 if the user is disabled/unknown, or
  `409 already_member` on duplicate.
- `DELETE /members/<uid>` revokes. 204 on success, 404 if the membership
  doesn't exist.

Every route reuses `_engagement_or_404` *before* any membership query, so
an RT operator targeting a foreign engagement receives the same 404 as for
a non-existent ID — matching the MA6 anti-leak posture flagged by
spec-analyst on this sprint.

Audit log viewer on `/api/v1/audit/log`:
- Single endpoint `GET`, paginated `Page[AuditLogEntry]`, gated by
  `AUDIT_READ` (rt_lead only).
- Filters: `?action=`, `?actor_id=`, `?resource_type=`, `?since=`,
  `?until=`. Times are ISO 8601; invalid input goes through the global 422
  envelope with a `loc` field for the bad parameter.
- Exposes `prev_hash` / `row_hash` to support future client-side
  chain-verification (D-013 stayed v1).
- Sorted by `ts DESC` so the most recent activity is the first page.

Blueprints registered in `api/__init__.py`.
2026-05-23 15:53:22 +02:00
..

Mimic — backend

Sprint 0 skeleton. Python 3.12+ / Flask / SQLAlchemy 2 / Alembic / Pydantic 2.

Layout

backend/
├── src/mimic/
│   ├── app.py                # Flask app factory + SocketIO init
│   ├── config.py             # Pydantic Settings
│   ├── extensions.py         # db, migrate, socketio, login_manager
│   ├── db/
│   │   ├── models/           # SQLAlchemy 2 typed models
│   │   ├── repositories/     # data access per aggregate
│   │   └── migrations/       # Alembic
│   ├── schemas/              # Pydantic 2 DTOs
│   ├── api/                  # Flask blueprints (REST)
│   ├── ws/                   # Flask-SocketIO namespaces
│   ├── connectors/           # C2Connector ABC + payload mapping
│   ├── orchestrator/         # run state machine (stub in sprint 0)
│   ├── templating/           # Jinja2 sandbox + regex_extract
│   ├── audit/                # append-only writer + rotation
│   ├── reporting/            # WeasyPrint builder (stub in sprint 0)
│   ├── rbac/                 # group-based permission matrix (F11)
│   ├── importers/            # ATR + C2 journal (stub in sprint 0)
│   └── cli/                  # mimic-cli (click)
└── tests/
    ├── unit/                 # SQLite, pure logic
    └── integration/          # testcontainers Postgres

Local dev

make install      # uv venv + pip install -e .[dev]
make db-up        # $(CONTAINER) compose up -d postgres  (auto-detect docker|podman)
make db-bootstrap # one-time: create the mimic_audit_writer role (see below)
make db-migrate   # alembic upgrade head
make run          # flask run (debug)
make test         # pytest unit
make test-int     # pytest integration (testcontainers)
make lint         # ruff + mypy strict

Audit writer role (dev)

mimic_audit_writer is provisioned by the Ansible playbook in production (decision D-010). For local development, create it manually after make db-up:

# Substitute "podman" for "docker" if your runtime is Podman.
$(command -v docker || command -v podman) exec -it mimic-postgres \
  psql -U mimic_app -d mimic \
  -c "CREATE ROLE mimic_audit_writer LOGIN PASSWORD 'pick-a-dev-secret';"

Then expose the same secret in MIMIC_DATABASE_AUDIT_URL in your .env. The Alembic migration grants the INSERT-only permission on audit_log against this role; if it does not exist, the grant block is a no-op (idempotent).

What sprint 0 ships

  • Full §8 data model + Alembic initial migration (Postgres-specific constraints: audit_log write-only role, soc_session hash, c2_credential Fernet column).
  • C2Connector ABC + dataclasses + payload_type enum + factory. No real Mythic/Home implementation (blocked on PR1/PR2).
  • Jinja2 SandboxedEnvironment + regex_extract filter (re2).
  • Local auth (bcrypt + Flask session) + group-based RBAC matching the F11 permission matrix.
  • Flat CRUD on engagements / hosts / TTPs / scenarios.
  • pytest baseline + testcontainers Postgres scaffolding.

Out of sprint 0

Orchestrator, WebSocket cockpit, real connectors, report generation, audit rotation.