Files
mimic-big/backend
knacky 38b35c933a feat(backend): wire auth endpoints + dev CORS (sprint 1)
Three login endpoints under /api/v1/auth/ + dev-only CORS so the Vite
frontend can drive the session cookie.

- POST /login validates local credentials and sets a Flask session cookie.
  Returns the CurrentUser shape on 200 (user_id, username=email,
  display_name, role, permissions, groups). Uniform 401 invalid_credentials
  on bad password or unknown user; a bcrypt round against a dummy hash runs
  even on unknown users so the request timing does not enumerate accounts.
  Audits an auth.login row and bumps user.last_login_at.
- POST /logout (login_required) clears the session, returns 204, audits an
  auth.logout row.
- GET /me returns the current principal or 401 not_authenticated. Used by
  the frontend at boot to rehydrate state.

Side wiring:
- LoginManager.unauthorized_handler emits the same {error, message} JSON
  envelope so @login_required 401s match the rest of the API surface.
- api/_helpers gains `serialize_current_user(AuthUser) -> CurrentUser` and
  `api_error(code, message, status)` — used by the auth blueprint and
  available to follow-up endpoints.
- AuthUser carries display_name + user_type now; identity.load_user routes
  through a new `authuser_from_orm()` helper that the login endpoint also
  uses so /login and the user_loader produce identical shapes.
- Dev-only CORS via flask-cors on /api/*, gated on
  MIMIC_ENV=development AND MIMIC_CORS_ORIGINS non-empty. Prod keeps
  same-origin (reverse proxy fronts the SPA + API).
- LoginRequest + CurrentUser DTOs added to mimic.schemas.

No frontend-visible change to engagements (sprint-0 already shipped
created_by_id, audit log, F11 scope).
2026-05-23 04:21:44 +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.