95 lines
3.5 KiB
Python
95 lines
3.5 KiB
Python
from __future__ import annotations
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import hmac
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import re
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from collections.abc import Generator
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from dataclasses import dataclass
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from fastapi import Depends, Header, HTTPException, Request, status
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from sqlalchemy.orm import Session
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from app.core.config import get_settings
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from app.core.db import SessionLocal
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from app.core.security import SessionPayload, read_session_token
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from app.models.user import User
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from app.schemas import CurrentUser, Role
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from app.services.sessions import is_session_revoked
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settings = get_settings()
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_VALID_ROLES = frozenset(Role.__args__) # type: ignore[attr-defined]
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def get_db() -> Generator[Session, None, None]:
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db = SessionLocal()
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try:
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yield db
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finally:
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db.close()
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def get_current_user(request: Request, db: Session = Depends(get_db)) -> CurrentUser:
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token = request.cookies.get(settings.session_cookie_name)
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payload: SessionPayload | None = read_session_token(token) if token else None
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revoked = token is not None and is_session_revoked(db, token)
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if payload is None or payload.role not in _VALID_ROLES or revoked:
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raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Not authenticated")
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# Demo reset deliberately rebuilds the deterministic users table. Retaining the
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# signed demo session until the reset endpoint clears its cookie keeps existing demo
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# workflows stable; operational sessions are always checked against the live record.
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if settings.mobilityops_demo_mode:
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demo_role: Role = payload.role # type: ignore[assignment]
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return CurrentUser(
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public_ref=payload.public_ref,
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display_name=payload.display_name,
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role=demo_role,
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)
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user = db.get(User, payload.user_id)
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if (
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user is None
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or not user.active
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or user.public_ref != payload.public_ref
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or user.role not in _VALID_ROLES
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):
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raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Not authenticated")
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role: Role = user.role # type: ignore[assignment]
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return CurrentUser(public_ref=user.public_ref, display_name=user.display_name, role=role)
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def require_operations_manager(
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user: CurrentUser = Depends(get_current_user),
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) -> CurrentUser:
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if user.role != "operations_manager":
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raise HTTPException(
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status_code=status.HTTP_403_FORBIDDEN, detail="Operations Manager role required"
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)
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return user
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@dataclass(frozen=True)
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class McpClientContext:
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reported_client_id: str
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tenant: str
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_MCP_CLIENT_ID = re.compile(
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r"^itworx-mcp-hub:(?:readiness|mobilityops:[A-Za-z0-9][A-Za-z0-9._:-]{0,127})$"
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)
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def require_mcp_service_token(
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x_service_token: str = Header(..., alias="X-Service-Token"),
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x_client_id: str = Header(..., alias="X-Client-Id", min_length=1, max_length=180),
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x_tenant_id: str | None = Header(default=None, alias="X-Tenant-Id", max_length=120),
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) -> McpClientContext:
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if not hmac.compare_digest(x_service_token, settings.mcp_hub_service_token):
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid service token"
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)
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if not _MCP_CLIENT_ID.fullmatch(x_client_id):
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raise HTTPException(
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status_code=status.HTTP_403_FORBIDDEN, detail="Untrusted MCP client identity"
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)
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if x_tenant_id is not None and x_tenant_id != settings.ragcore_tenant:
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raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="Tenant mismatch")
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return McpClientContext(reported_client_id=x_client_id, tenant=settings.ragcore_tenant)
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