133 lines
4.3 KiB
Python
133 lines
4.3 KiB
Python
"""Detection rules endpoints — listing, filtering, and template association.
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Thin HTTP adapter: delegates all query and business logic to detection_rule_service.
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Provides endpoints for browsing detection rules, querying rules by technique,
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and managing the template ↔ detection rule associations.
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"""
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import uuid
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from typing import Optional
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from fastapi import APIRouter, Depends, Query
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from pydantic import BaseModel
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from sqlalchemy.orm import Session
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from app.database import get_db
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from app.dependencies.auth import get_current_user, require_role, require_any_role
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from app.models.user import User
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from app.services.detection_rule_service import (
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list_rules,
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get_rules_for_template,
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auto_associate_rules,
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get_rules_for_test,
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evaluate_rule,
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)
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# ── Pydantic schemas for request validation ────────────────────────────
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class DetectionRuleEvaluate(BaseModel):
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"""Payload for evaluating a detection rule against a test."""
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test_id: uuid.UUID
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detection_rule_id: uuid.UUID
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triggered: Optional[bool] = None
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notes: Optional[str] = None
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router = APIRouter(prefix="/detection-rules", tags=["detection-rules"])
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# ── GET /detection-rules — List with filters ───────────────────────────
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@router.get("")
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def list_detection_rules(
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technique: Optional[str] = Query(None, description="Filter by MITRE technique ID"),
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source: Optional[str] = Query(None, description="Filter by source (sigma, elastic, splunk, custom)"),
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severity: Optional[str] = Query(None),
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search: Optional[str] = Query(None),
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offset: int = Query(0, ge=0),
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limit: int = Query(50, ge=1, le=200),
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db: Session = Depends(get_db),
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current_user: User = Depends(get_current_user),
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):
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"""List detection rules with optional filters and pagination."""
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return list_rules(
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db,
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technique=technique,
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source=source,
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severity=severity,
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search=search,
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offset=offset,
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limit=limit,
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)
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# ── GET /detection-rules/for-template/{template_id} ────────────────────
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@router.get("/for-template/{template_id}")
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def get_detection_rules_for_template(
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template_id: str,
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db: Session = Depends(get_db),
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current_user: User = Depends(get_current_user),
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):
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"""Get detection rules associated with a test template."""
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return get_rules_for_template(db, template_id)
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# ── POST /detection-rules/auto-associate ────────────────────────────────
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@router.post("/auto-associate")
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def auto_associate_detection_rules(
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db: Session = Depends(get_db),
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current_user: User = Depends(require_role("admin")),
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):
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"""Auto-associate test templates with detection rules by MITRE technique ID.
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For each active template, find all active detection rules for the same
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technique and create associations. Rules with severity >= high are marked
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as primary.
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"""
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return auto_associate_rules(db)
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# ── GET /detection-rules/for-test/{test_id} ──────────────────────────────
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@router.get("/for-test/{test_id}")
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def get_detection_rules_for_test(
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test_id: str,
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db: Session = Depends(get_db),
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current_user: User = Depends(get_current_user),
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):
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"""Get detection rules relevant to a test, along with their evaluation results.
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Finds rules by matching the test's technique_id to detection rules,
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and returns any existing evaluation results.
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"""
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return get_rules_for_test(db, test_id)
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# ── POST /detection-rules/evaluate ──────────────────────────────────────
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@router.post("/evaluate")
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def evaluate_detection_rule(
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payload: DetectionRuleEvaluate,
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db: Session = Depends(get_db),
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current_user: User = Depends(require_any_role("blue_tech", "blue_lead")),
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):
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"""Save or update the evaluation result for a detection rule on a test."""
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return evaluate_rule(
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db,
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test_id=payload.test_id,
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detection_rule_id=payload.detection_rule_id,
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triggered=payload.triggered,
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notes=payload.notes,
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evaluator_id=current_user.id,
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)
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