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# ------------------------------------
# Copyright (c) Microsoft Corporation.
# Licensed under the MIT License.
# ------------------------------------
import asyncio
from datetime import datetime
import json
import re
import sys
from unittest import mock
from azure.identity import CredentialUnavailableError
from azure.identity.aio import AzureCliCredential
from azure.identity._constants import EnvironmentVariables
from azure.identity._credentials.azure_cli import CLI_NOT_FOUND, NOT_LOGGED_IN
from azure.core.exceptions import ClientAuthenticationError
import pytest
from helpers_async import get_completed_future
from test_cli_credential import TEST_ERROR_OUTPUTS
SUBPROCESS_EXEC = AzureCliCredential.__module__ + ".asyncio.create_subprocess_exec"
pytestmark = pytest.mark.asyncio
def mock_exec(stdout, stderr="", return_code=0):
async def communicate():
return (stdout.encode(), stderr.encode())
process = mock.Mock(communicate=communicate, returncode=return_code)
return mock.Mock(return_value=get_completed_future(process))
async def test_no_scopes():
"""The credential should raise ValueError when get_token is called with no scopes"""
with pytest.raises(ValueError):
await AzureCliCredential().get_token()
async def test_multiple_scopes():
"""The credential should raise ValueError when get_token is called with more than one scope"""
with pytest.raises(ValueError):
await AzureCliCredential().get_token("one scope", "and another")
async def test_close():
"""The credential must define close, although it's a no-op because the credential has no transport"""
await AzureCliCredential().close()
async def test_context_manager():
"""The credential must be a context manager, although it does nothing as one because it has no transport"""
async with AzureCliCredential():
pass
@pytest.mark.skipif(not sys.platform.startswith("win"), reason="tests Windows-specific behavior")
async def test_windows_fallback():
"""The credential should fall back to the sync implementation when not using ProactorEventLoop on Windows"""
sync_get_token = mock.Mock()
with mock.patch("azure.identity.aio._credentials.azure_cli._SyncAzureCliCredential") as fallback:
fallback.return_value = mock.Mock(get_token=sync_get_token)
with mock.patch(AzureCliCredential.__module__ + ".asyncio.get_event_loop"):
# asyncio.get_event_loop now returns Mock, i.e. never ProactorEventLoop
credential = AzureCliCredential()
await credential.get_token("scope")
assert sync_get_token.call_count == 1
async def test_get_token():
"""The credential should parse the CLI's output to an AccessToken"""
access_token = "access token"
expected_expires_on = 1602015811
successful_output = json.dumps(
{
"expiresOn": datetime.fromtimestamp(expected_expires_on).strftime("%Y-%m-%d %H:%M:%S.%f"),
"accessToken": access_token,
"subscription": "some-guid",
"tenant": "some-guid",
"tokenType": "Bearer",
}
)
with mock.patch("shutil.which", return_value="az"):
with mock.patch(SUBPROCESS_EXEC, mock_exec(successful_output)):
credential = AzureCliCredential()
token = await credential.get_token("scope")
assert token.token == access_token
assert type(token.expires_on) == int
assert token.expires_on == expected_expires_on
async def test_cli_not_installed():
"""The credential should raise CredentialUnavailableError when the CLI isn't installed"""
with mock.patch("shutil.which", return_value=None):
with pytest.raises(CredentialUnavailableError, match=CLI_NOT_FOUND):
credential = AzureCliCredential()
await credential.get_token("scope")
async def test_cannot_execute_shell():
"""The credential should raise CredentialUnavailableError when the subprocess doesn't start"""
with mock.patch("shutil.which", return_value="az"):
with mock.patch(SUBPROCESS_EXEC, mock.Mock(side_effect=OSError())):
with pytest.raises(CredentialUnavailableError):
credential = AzureCliCredential()
await credential.get_token("scope")
async def test_not_logged_in():
"""When the CLI isn't logged in, the credential should raise CredentialUnavailableError"""
stderr = "ERROR: Please run 'az login' to setup account."
with mock.patch("shutil.which", return_value="az"):
with mock.patch(SUBPROCESS_EXEC, mock_exec("", stderr, return_code=1)):
with pytest.raises(CredentialUnavailableError, match=NOT_LOGGED_IN):
credential = AzureCliCredential()
await credential.get_token("scope")
async def test_unexpected_error():
"""When the CLI returns an unexpected error, the credential should raise an error containing the CLI's output"""
stderr = "something went wrong"
with mock.patch("shutil.which", return_value="az"):
with mock.patch(SUBPROCESS_EXEC, mock_exec("", stderr, return_code=42)):
with pytest.raises(ClientAuthenticationError, match=stderr):
credential = AzureCliCredential()
await credential.get_token("scope")
@pytest.mark.parametrize("output", TEST_ERROR_OUTPUTS)
async def test_parsing_error_does_not_expose_token(output):
"""Errors during CLI output parsing shouldn't expose access tokens in that output"""
with mock.patch("shutil.which", return_value="az"):
with mock.patch(SUBPROCESS_EXEC, mock_exec(output)):
with pytest.raises(ClientAuthenticationError) as ex:
credential = AzureCliCredential()
await credential.get_token("scope")
assert "secret value" not in str(ex.value)
assert "secret value" not in repr(ex.value)
@pytest.mark.parametrize("output", TEST_ERROR_OUTPUTS)
async def test_subprocess_error_does_not_expose_token(output):
"""Errors from the subprocess shouldn't expose access tokens in CLI output"""
with mock.patch("shutil.which", return_value="az"):
with mock.patch(SUBPROCESS_EXEC, mock_exec(output, return_code=1)):
with pytest.raises(ClientAuthenticationError) as ex:
credential = AzureCliCredential()
await credential.get_token("scope")
assert "secret value" not in str(ex.value)
assert "secret value" not in repr(ex.value)
async def test_timeout():
"""The credential should kill the subprocess after a timeout"""
proc = mock.Mock(communicate=mock.Mock(side_effect=asyncio.TimeoutError), returncode=None)
with mock.patch("shutil.which", return_value="az"):
with mock.patch(SUBPROCESS_EXEC, mock.Mock(return_value=get_completed_future(proc))):
with pytest.raises(CredentialUnavailableError):
await AzureCliCredential().get_token("scope")
assert proc.communicate.call_count == 1
async def test_multitenant_authentication():
default_tenant = "first-tenant"
first_token = "***"
second_tenant = "second-tenant"
second_token = first_token * 2
async def fake_exec(*args, **_):
match = re.search("--tenant (.*)", args[-1])
tenant = match[1] if match else default_tenant
assert tenant in (default_tenant, second_tenant), 'unexpected tenant "{}"'.format(tenant)
output = json.dumps(
{
"expiresOn": datetime.now().strftime("%Y-%m-%d %H:%M:%S.%f"),
"accessToken": first_token if tenant == default_tenant else second_token,
"subscription": "some-guid",
"tenant": tenant,
"tokenType": "Bearer",
}
).encode()
return mock.Mock(communicate=mock.Mock(return_value=get_completed_future((output, b""))), returncode=0)
credential = AzureCliCredential()
with mock.patch("shutil.which", return_value="az"):
with mock.patch(SUBPROCESS_EXEC, fake_exec):
token = await credential.get_token("scope")
assert token.token == first_token
token = await credential.get_token("scope", tenant_id=default_tenant)
assert token.token == first_token
token = await credential.get_token("scope", tenant_id=second_tenant)
assert token.token == second_token
# should still default to the first tenant
token = await credential.get_token("scope")
assert token.token == first_token
async def test_multitenant_authentication_not_allowed():
expected_tenant = "expected-tenant"
expected_token = "***"
async def fake_exec(*args, **_):
match = re.search("--tenant (.*)", args[-1])
assert match is None or match[1] == expected_tenant
output = json.dumps(
{
"expiresOn": datetime.now().strftime("%Y-%m-%d %H:%M:%S.%f"),
"accessToken": expected_token,
"subscription": "some-guid",
"tenant": expected_token,
"tokenType": "Bearer",
}
).encode()
return mock.Mock(communicate=mock.Mock(return_value=get_completed_future((output, b""))), returncode=0)
credential = AzureCliCredential()
with mock.patch("shutil.which", return_value="az"):
with mock.patch(SUBPROCESS_EXEC, fake_exec):
token = await credential.get_token("scope")
assert token.token == expected_token
with mock.patch.dict("os.environ", {EnvironmentVariables.AZURE_IDENTITY_DISABLE_MULTITENANTAUTH: "true"}):
token = await credential.get_token("scope", tenant_id="un" + expected_tenant)
assert token.token == expected_token
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