mirror of
https://github.com/GSA/notifications-api.git
synced 2025-12-17 10:42:25 -05:00
e8c3a5cdde
cleaned up some auth code to marginally improve efficiency of error checking and hopefully make it easier to read fixed some incorrect auth headers in the deactivate tests
90 lines
2.8 KiB
Python
90 lines
2.8 KiB
Python
from flask import request, _request_ctx_stack, current_app
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from sqlalchemy.exc import DataError
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from sqlalchemy.orm.exc import NoResultFound
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from notifications_python_client.authentication import decode_jwt_token, get_token_issuer
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from notifications_python_client.errors import TokenDecodeError, TokenExpiredError
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from app.dao.api_key_dao import get_model_api_keys
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from app.dao.services_dao import dao_fetch_service_by_id
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class AuthError(Exception):
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def __init__(self, message, code):
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self.message = {"token": [message]}
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self.short_message = message
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self.code = code
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def to_dict_v2(self):
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return {'code': self.code,
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'message': self.short_message,
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'fields': self.message,
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'link': 'link to docs'}
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def get_auth_token(req):
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auth_header = req.headers.get('Authorization', None)
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if not auth_header:
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raise AuthError('Unauthorized, authentication token must be provided', 401)
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auth_scheme = auth_header[:7].title()
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if auth_scheme != 'Bearer ':
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raise AuthError('Unauthorized, authentication bearer scheme must be used', 401)
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return auth_header[7:]
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def requires_auth():
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auth_token = get_auth_token(request)
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try:
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client = get_token_issuer(auth_token)
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except TokenDecodeError:
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raise AuthError("Invalid token: signature", 403)
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if client == current_app.config.get('ADMIN_CLIENT_USER_NAME'):
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return handle_admin_key(auth_token, current_app.config.get('ADMIN_CLIENT_SECRET'))
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try:
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service = dao_fetch_service_by_id(client)
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except DataError:
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raise AuthError("Invalid token: service id is not the right data type", 403)
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except NoResultFound:
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raise AuthError("Invalid token: service not found", 403)
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if not service.api_keys:
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raise AuthError("Invalid token: service has no API keys", 403)
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if not service.active:
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raise AuthError("Invalid token: service is archived", 403)
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for api_key in service.api_keys:
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try:
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get_decode_errors(auth_token, api_key.unsigned_secret)
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except TokenDecodeError:
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continue
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if api_key.expiry_date:
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raise AuthError("Invalid token: API key revoked", 403)
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_request_ctx_stack.top.api_user = api_key
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return
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else:
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# service has API keys, but none matching the one the user provided
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raise AuthError("Invalid token: signature, api token is not valid", 403)
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def handle_admin_key(auth_token, secret):
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try:
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get_decode_errors(auth_token, secret)
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return
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except TokenDecodeError:
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raise AuthError("Invalid token: signature", 403)
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def get_decode_errors(auth_token, unsigned_secret):
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try:
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decode_jwt_token(auth_token, unsigned_secret)
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except TokenExpiredError:
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raise AuthError("Invalid token: expired", 403)
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