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""" |
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Copyright 2024 Infosys Ltd.” |
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Use of this source code is governed by MIT license that can be found in the LICENSE file or at |
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MIT license https://opensource.org/licenses/MIT |
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Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: |
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The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. |
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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""" |
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from fastapi import Depends, HTTPException, status |
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from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials |
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import os |
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import jose.jwt as jwt |
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from dotenv import load_dotenv |
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import requests |
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import logging |
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load_dotenv() |
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AZURE_TENANT_ID = os.getenv('AZURE_TENANT_ID') |
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AZURE_CLIENT_ID = os.getenv('AZURE_CLIENT_ID') |
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security = HTTPBearer() |
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log = logging.getLogger(__name__) |
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def get_public_keys(): |
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jwks_url = os.getenv('AZURE_AD_JWKS_URL') |
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response = requests.get(jwks_url) |
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if response.status_code != 200: |
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log.error(f"Failed to fetch JWKS: HTTP {response.status_code}") |
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raise HTTPException(status_code=500, detail="Failed to fetch JWKS") |
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jwks = response.json() |
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if 'keys' not in jwks: |
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log.error("JWKS response does not contain 'keys'") |
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raise HTTPException(status_code=500, detail="JWKS response format is invalid") |
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log.info(f"JWKS response: {jwks}") |
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return {key['kid']: key for key in jwks['keys']} |
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def authenticate_client_id(credentials: HTTPAuthorizationCredentials = Depends(security)): |
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authorization = credentials.credentials |
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headers = {'Authorization': f"Bearer {authorization}"} |
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if authorization: |
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try: |
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header = jwt.get_unverified_header(authorization) |
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kid = header['kid'] |
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keys = get_public_keys() |
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key = keys[kid] |
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decoded_token = jwt.decode(authorization, key, algorithms=['RS256'], audience=AZURE_CLIENT_ID, options={"verify_signature": True}) |
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log.info(f"Valid token: {decoded_token}") |
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log.info(f"Issuer: {decoded_token.get('iss')}") |
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log.info(f"Client ID: {decoded_token.get('aud')}") |
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log.info(f"Tenant ID: {decoded_token.get('tid')}") |
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except ExpiredSignatureError as e: |
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log.error(f"Token has expired: {e}") |
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raise HTTPException(status_code=401, detail="Token has expired") |
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except JWTError as e: |
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log.error(f"Invalid token: {e}") |
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raise HTTPException(status_code=401, detail="Invalid token") |
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except Exception as e: |
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log.error(f"Unexpected error: {e}") |
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raise HTTPException(status_code=500, detail="Unexpected error") |
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def get_auth_client_id(): |
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return authenticate_client_id |
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