# ------------------------------------
# Copyright (c) Microsoft Corporation.
# Licensed under the MIT License.
# ------------------------------------
from typing import TYPE_CHECKING
from azure.core.exceptions import ClientAuthenticationError
from .._internal.aad_client import AadClient
if TYPE_CHECKING:
# pylint:disable=unused-import,ungrouped-imports
from typing import Any, Iterable, Optional
from azure.core.credentials import AccessToken
[docs]class AuthorizationCodeCredential(object):
"""Authenticates by redeeming an authorization code previously obtained from Azure Active Directory.
See https://docs.microsoft.com/en-us/azure/active-directory/develop/v2-oauth2-auth-code-flow for more information
about the authentication flow.
:param str tenant_id: ID of the application's Azure Active Directory tenant. Also called its 'directory' ID.
:param str client_id: the application's client ID
:param str authorization_code: the authorization code from the user's log-in
:param str redirect_uri: The application's redirect URI. Must match the URI used to request the authorization code.
:keyword str authority: Authority of an Azure Active Directory endpoint, for example 'login.microsoftonline.com',
the authority for Azure Public Cloud (which is the default). :class:`~azure.identity.KnownAuthorities`
defines authorities for other clouds.
:keyword str client_secret: One of the application's client secrets. Required only for web apps and web APIs.
"""
def __init__(self, tenant_id, client_id, authorization_code, redirect_uri, **kwargs):
# type: (str, str, str, str, **Any) -> None
self._authorization_code = authorization_code # type: Optional[str]
self._client_id = client_id
self._client_secret = kwargs.pop("client_secret", None)
self._client = kwargs.pop("client", None) or AadClient(tenant_id, client_id, **kwargs)
self._redirect_uri = redirect_uri
[docs] def get_token(self, *scopes, **kwargs):
# type: (*str, **Any) -> AccessToken
"""Request an access token for ``scopes``.
The first time this method is called, the credential will redeem its authorization code. On subsequent calls
the credential will return a cached access token or redeem a refresh token, if it acquired a refresh token upon
redeeming the authorization code.
.. note:: This method is called by Azure SDK clients. It isn't intended for use in application code.
:param str scopes: desired scopes for the access token
:rtype: :class:`azure.core.credentials.AccessToken`
:raises ~azure.core.exceptions.ClientAuthenticationError:
"""
if self._authorization_code:
token = self._client.obtain_token_by_authorization_code(
code=self._authorization_code, redirect_uri=self._redirect_uri, scopes=scopes, **kwargs
)
self._authorization_code = None # auth codes are single-use
return token
token = self._client.get_cached_access_token(scopes) or self._redeem_refresh_token(scopes, **kwargs)
if not token:
raise ClientAuthenticationError(
message="No authorization code, cached access token, or refresh token available."
)
return token
def _redeem_refresh_token(self, scopes, **kwargs):
# type: (Iterable[str], **Any) -> Optional[AccessToken]
for refresh_token in self._client.get_cached_refresh_tokens(scopes):
token = self._client.obtain_token_by_refresh_token(refresh_token, scopes, **kwargs)
if token:
return token
return None