# ------------------------------------
# Copyright (c) Microsoft Corporation.
# Licensed under the MIT License.
# ------------------------------------
from typing import TYPE_CHECKING
from azure.core.exceptions import ClientAuthenticationError
from .._internal import AadClient, AsyncContextManager
from .._internal.get_token_mixin import GetTokenMixin
if TYPE_CHECKING:
# pylint:disable=unused-import,ungrouped-imports
from typing import Any, Iterable, Optional
from azure.core.credentials import AccessToken
[docs]class AuthorizationCodeCredential(AsyncContextManager, GetTokenMixin):
"""Authenticates by redeeming an authorization code previously obtained from Azure Active Directory.
See https://docs.microsoft.com/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.AzureAuthorityHosts`
defines authorities for other clouds.
:keyword str client_secret: One of the application's client secrets. Required only for web apps and web APIs.
"""
async def __aenter__(self):
if self._client:
await self._client.__aenter__()
return self
[docs] async def close(self):
"""Close the credential's transport session."""
if self._client:
await self._client.__aexit__()
def __init__(
self, tenant_id: str, client_id: str, authorization_code: str, redirect_uri: str, **kwargs: "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
super().__init__()
[docs] async def get_token(self, *scopes: str, **kwargs: "Any") -> "AccessToken":
"""Request an access token for `scopes`.
This method is called automatically by Azure SDK clients.
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.
:param str scopes: desired scopes for the access token. This method requires at least one scope.
:rtype: :class:`azure.core.credentials.AccessToken`
:raises ~azure.core.exceptions.ClientAuthenticationError: authentication failed. The error's ``message``
attribute gives a reason. Any error response from Azure Active Directory is available as the error's
``response`` attribute.
"""
return await super().get_token(*scopes, **kwargs)
async def _acquire_token_silently(self, *scopes: str) -> "Optional[AccessToken]":
return self._client.get_cached_access_token(scopes)
async def _request_token(self, *scopes: str, **kwargs: "Any") -> "AccessToken":
if self._authorization_code:
token = await self._client.obtain_token_by_authorization_code(
scopes=scopes, code=self._authorization_code, redirect_uri=self._redirect_uri, **kwargs
)
self._authorization_code = None # auth codes are single-use
return token
token = None
for refresh_token in self._client.get_cached_refresh_tokens(scopes):
if "secret" in refresh_token:
token = await self._client.obtain_token_by_refresh_token(scopes, refresh_token["secret"], **kwargs)
if token:
break
if not token:
raise ClientAuthenticationError(
message="No authorization code, cached access token, or refresh token available."
)
return token