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# ------------------------------------
# Copyright (c) Microsoft Corporation.
# Licensed under the MIT License.
# ------------------------------------
from typing import Optional, TypeVar, Any
from azure.core.credentials import AccessToken
from .._internal import AadClient, AsyncContextManager
from .._internal.get_token_mixin import GetTokenMixin
from ..._internal import validate_tenant_id
T = TypeVar("T", bound="ClientSecretCredential")
class ClientSecretCredential(AsyncContextManager, GetTokenMixin):
"""Authenticates as a service principal using a client secret.
:param str tenant_id: ID of the service principal's tenant. Also called its 'directory' ID.
:param str client_id: The service principal's client ID
:param str client_secret: One of the service principal's client secrets
:keyword str authority: Authority of a Microsoft Entra 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 cache_persistence_options: Configuration for persistent token caching. If unspecified, the credential
will cache tokens in memory.
:paramtype cache_persistence_options: ~azure.identity.TokenCachePersistenceOptions
:keyword List[str] additionally_allowed_tenants: Specifies tenants in addition to the specified "tenant_id"
for which the credential may acquire tokens. Add the wildcard value "*" to allow the credential to
acquire tokens for any tenant the application can access.
.. admonition:: Example:
.. literalinclude:: ../samples/credential_creation_code_snippets.py
:start-after: [START create_client_secret_credential_async]
:end-before: [END create_client_secret_credential_async]
:language: python
:dedent: 4
:caption: Create a ClientSecretCredential.
"""
def __init__(self, tenant_id: str, client_id: str, client_secret: str, **kwargs: Any) -> None:
if not client_id:
raise ValueError("client_id should be the id of a Microsoft Entra application")
if not client_secret:
raise ValueError("secret should be a Microsoft Entra application's client secret")
if not tenant_id:
raise ValueError("tenant_id should be a Microsoft Entra tenant's id (also called its 'directory id')")
validate_tenant_id(tenant_id)
self._client = AadClient(tenant_id, client_id, **kwargs)
self._client_id = client_id
self._secret = client_secret
super().__init__()
async def __aenter__(self: T) -> T:
await self._client.__aenter__()
return self
async def close(self) -> None:
"""Close the credential's transport session."""
await self._client.__aexit__()
async def _acquire_token_silently(self, *scopes: str, **kwargs: Any) -> Optional[AccessToken]:
return self._client.get_cached_access_token(scopes, **kwargs)
async def _request_token(self, *scopes: str, **kwargs: Any) -> AccessToken:
return await self._client.obtain_token_by_client_secret(scopes, self._secret, **kwargs)