56 lines
1.8 KiB
Python
56 lines
1.8 KiB
Python
import hashlib
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import hmac
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import secrets
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from fastapi import Depends, HTTPException, Security
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from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
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from sqlalchemy import select
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from sqlalchemy.orm import Session
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from app.config import get_settings
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from app.database import get_db
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from app.models import ApiKey
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security_scheme = HTTPBearer(auto_error=False)
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def _legacy_hash_api_key(raw_key: str) -> str:
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return hashlib.sha256(raw_key.encode("utf-8")).hexdigest()
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def hash_api_key(raw_key: str) -> str:
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secret = get_settings().jwt_secret.encode("utf-8")
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return hmac.new(secret, raw_key.encode("utf-8"), hashlib.sha256).hexdigest()
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def verify_api_key_hash(raw_key: str, stored_hash: str) -> bool:
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if hmac.compare_digest(hash_api_key(raw_key), stored_hash):
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return True
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return hmac.compare_digest(_legacy_hash_api_key(raw_key), stored_hash)
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def generate_api_key() -> tuple[str, str, str]:
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"""Returns (full_key, prefix, hash)."""
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raw = f"sac_{secrets.token_urlsafe(32)}"
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prefix = raw[:12]
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return raw, prefix, hash_api_key(raw)
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def verify_api_key(db: Session, raw_key: str) -> bool:
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rows = db.scalars(select(ApiKey).where(ApiKey.is_active.is_(True))).all()
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for row in rows:
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if verify_api_key_hash(raw_key, row.key_hash):
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return True
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return False
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def get_api_key_auth(
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credentials: HTTPAuthorizationCredentials | None = Security(security_scheme),
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db: Session = Depends(get_db),
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) -> str:
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if credentials is None or credentials.scheme.lower() != "bearer":
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raise HTTPException(status_code=401, detail="Missing or invalid Authorization header")
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if not verify_api_key(db, credentials.credentials):
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raise HTTPException(status_code=401, detail="Invalid API key")
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return credentials.credentials
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