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import os
from typing import Callable, Union
from litellm._logging import verbose_logger
def get_azure_ad_token_provider() -> Callable[[], str]:
"""
Get Azure AD token provider based on Service Principal with Secret workflow.
Based on: https://github.com/openai/openai-python/blob/main/examples/azure_ad.py
See Also:
https://learn.microsoft.com/en-us/python/api/overview/azure/identity-readme?view=azure-python#service-principal-with-secret;
https://learn.microsoft.com/en-us/python/api/azure-identity/azure.identity.clientsecretcredential?view=azure-python.
Returns:
Callable that returns a temporary authentication token.
"""
from azure.identity import (
ClientSecretCredential,
DefaultAzureCredential,
get_bearer_token_provider,
)
try:
credential: Union[ClientSecretCredential, DefaultAzureCredential] = (
ClientSecretCredential(
client_id=os.environ["AZURE_CLIENT_ID"],
client_secret=os.environ["AZURE_CLIENT_SECRET"],
tenant_id=os.environ["AZURE_TENANT_ID"],
)
)
except KeyError as e:
verbose_logger.exception(
"Missing environment variable required by Azure AD workflow. "
"DefaultAzureCredential will be used"
" {}".format(str(e))
)
credential = DefaultAzureCredential()
except Exception:
raise
return get_bearer_token_provider(
credential,
"https://cognitiveservices.azure.com/.default",
)
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