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# Ultralytics YOLO 🚀, AGPL-3.0 license
import requests
from ultralytics.hub.utils import HUB_API_ROOT, HUB_WEB_ROOT, PREFIX, request_with_credentials
from ultralytics.utils import LOGGER, SETTINGS, emojis, is_colab
API_KEY_URL = f"{HUB_WEB_ROOT}/settings?tab=api+keys"
class Auth:
"""
Manages authentication processes including API key handling, cookie-based authentication, and header generation.
The class supports different methods of authentication:
1. Directly using an API key.
2. Authenticating using browser cookies (specifically in Google Colab).
3. Prompting the user to enter an API key.
Attributes:
id_token (str or bool): Token used for identity verification, initialized as False.
api_key (str or bool): API key for authentication, initialized as False.
model_key (bool): Placeholder for model key, initialized as False.
"""
id_token = api_key = model_key = False
def __init__(self, api_key="", verbose=False):
"""
Initialize the Auth class with an optional API key.
Args:
api_key (str, optional): May be an API key or a combination API key and model ID, i.e. key_id
"""
# Split the input API key in case it contains a combined key_model and keep only the API key part
api_key = api_key.split("_")[0]
# Set API key attribute as value passed or SETTINGS API key if none passed
self.api_key = api_key or SETTINGS.get("api_key", "")
# If an API key is provided
if self.api_key:
# If the provided API key matches the API key in the SETTINGS
if self.api_key == SETTINGS.get("api_key"):
# Log that the user is already logged in
if verbose:
LOGGER.info(f"{PREFIX}Authenticated ✅")
return
else:
# Attempt to authenticate with the provided API key
success = self.authenticate()
# If the API key is not provided and the environment is a Google Colab notebook
elif is_colab():
# Attempt to authenticate using browser cookies
success = self.auth_with_cookies()
else:
# Request an API key
success = self.request_api_key()
# Update SETTINGS with the new API key after successful authentication
if success:
SETTINGS.update({"api_key": self.api_key})
# Log that the new login was successful
if verbose:
LOGGER.info(f"{PREFIX}New authentication successful ✅")
elif verbose:
LOGGER.info(f"{PREFIX}Get API key from {API_KEY_URL} and then run 'yolo hub login API_KEY'")
def request_api_key(self, max_attempts=3):
"""
Prompt the user to input their API key.
Returns the model ID.
"""
import getpass
for attempts in range(max_attempts):
LOGGER.info(f"{PREFIX}Login. Attempt {attempts + 1} of {max_attempts}")
input_key = getpass.getpass(f"Enter API key from {API_KEY_URL} ")
self.api_key = input_key.split("_")[0] # remove model id if present
if self.authenticate():
return True
raise ConnectionError(emojis(f"{PREFIX}Failed to authenticate ❌"))
def authenticate(self) -> bool:
"""
Attempt to authenticate with the server using either id_token or API key.
Returns:
(bool): True if authentication is successful, False otherwise.
"""
try:
if header := self.get_auth_header():
r = requests.post(f"{HUB_API_ROOT}/v1/auth", headers=header)
if not r.json().get("success", False):
raise ConnectionError("Unable to authenticate.")
return True
raise ConnectionError("User has not authenticated locally.")
except ConnectionError:
self.id_token = self.api_key = False # reset invalid
LOGGER.warning(f"{PREFIX}Invalid API key ⚠️")
return False
def auth_with_cookies(self) -> bool:
"""
Attempt to fetch authentication via cookies and set id_token. User must be logged in to HUB and running in a
supported browser.
Returns:
(bool): True if authentication is successful, False otherwise.
"""
if not is_colab():
return False # Currently only works with Colab
try:
authn = request_with_credentials(f"{HUB_API_ROOT}/v1/auth/auto")
if authn.get("success", False):
self.id_token = authn.get("data", {}).get("idToken", None)
self.authenticate()
return True
raise ConnectionError("Unable to fetch browser authentication details.")
except ConnectionError:
self.id_token = False # reset invalid
return False
def get_auth_header(self):
"""
Get the authentication header for making API requests.
Returns:
(dict): The authentication header if id_token or API key is set, None otherwise.
"""
if self.id_token:
return {"authorization": f"Bearer {self.id_token}"}
elif self.api_key:
return {"x-api-key": self.api_key}
# else returns None
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