[Tables] Adds support for AzureNamedKeyCredential (Azure#18456)

Azure#18441

Author: seankane-msft

sdk/tables/azure-data-tables/CHANGELOG.md

@@ -15,9 +15,11 @@
 * Changed optional `value` and `type` arguments of `EntityProperty` to required.
 * Renamed `EntityProperty.type` to `EntityProperty.edm_type`.
 * `BatchErrorException` has been renamed to `TableTransactionError`.
+* The only supported credentials are `AzureNamedKeyCredential`, `AzureSasCredential`, or authentication by connection string
 * `EntityProperty` is now a tuple.
 * Removed `date` and `api_version` from the `TableItem` class.
 
+
 **Fixes**
 * Fixed issue with Cosmos merge operations.
 * Removed legacy Storage policies from pipeline.

sdk/tables/azure-data-tables/azure/data/tables/_authentication.py

@@ -5,6 +5,8 @@
 # --------------------------------------------------------------------------
 
 import logging
+import sys
+from typing import Union
 
 try:
     from urllib.parse import urlparse
@@ -32,6 +34,9 @@
     _wrap_exception,
 )
 
+if sys.version_info > (3, 5):
+    from typing import Awaitable  # pylint: disable=ungrouped-imports
+
 logger = logging.getLogger(__name__)
 
 
@@ -45,11 +50,8 @@ class AzureSigningError(ClientAuthenticationError):
 
 # pylint: disable=no-self-use
 class SharedKeyCredentialPolicy(SansIOHTTPPolicy):
-    def __init__(
-        self, account_name, account_key, is_emulated=False
-    ):
-        self.account_name = account_name
-        self.account_key = account_key
+    def __init__(self, credential, is_emulated=False):
+        self._credential = credential
         self.is_emulated = is_emulated
 
     def _get_headers(self, request, headers_to_sign):
@@ -82,10 +84,10 @@ def _get_canonicalized_resource(self, request):
                 )
             ):
                 uri_path = URL(uri_path)
-                return "/" + self.account_name + str(uri_path)
+                return "/" + self._credential.named_key.name + str(uri_path)
         except TypeError:
             pass
-        return "/" + self.account_name + uri_path
+        return "/" + self._credential.named_key.name + uri_path
 
     def _get_canonicalized_headers(self, request):
         string_to_sign = ""
@@ -101,17 +103,16 @@ def _get_canonicalized_headers(self, request):
 
     def _add_authorization_header(self, request, string_to_sign):
         try:
-            signature = _sign_string(self.account_key, string_to_sign)
-            auth_string = "SharedKey " + self.account_name + ":" + signature
+            signature = _sign_string(self._credential.named_key.key, string_to_sign)
+            auth_string = "SharedKey " + self._credential.named_key.name + ":" + signature
             request.headers["Authorization"] = auth_string
         except Exception as ex:
             # Wrap any error that occurred as signing error
             # Doing so will clarify/locate the source of problem
             raise _wrap_exception(ex, AzureSigningError)
 
-    def on_request(
-        self, request
-    ):  # type: (PipelineRequest) -> Union[None, Awaitable[None]]
+    def on_request(self, request):
+    # type: (PipelineRequest) -> Union[None, Awaitable[None]]
         self.sign_request(request)
 
     def sign_request(self, request):

sdk/tables/azure-data-tables/azure/data/tables/_base_client.py

@@ -13,7 +13,7 @@
     from urllib2 import quote  # type: ignore
 
 import six
-from azure.core.credentials import AzureSasCredential
+from azure.core.credentials import AzureSasCredential, AzureNamedKeyCredential
 from azure.core.utils import parse_connection_string
 from azure.core.pipeline.transport import (
     HttpTransport,
@@ -30,7 +30,7 @@
     AzureSasCredentialPolicy,
     NetworkTraceLoggingPolicy,
     CustomHookPolicy,
-    RequestIdPolicy
+    RequestIdPolicy,
 )
 
 from ._generated import AzureTable
@@ -111,7 +111,7 @@ def __init__(
                 self.account_name = account[0] if len(account) > 1 else None
 
         secondary_hostname = None
-        self.credential = format_shared_key_credential(account, credential)
+        self.credential = credential
         if self.scheme.lower() != "https" and hasattr(self.credential, "get_token"):
             raise ValueError("Token credential is only supported with HTTPS.")
         if hasattr(self.credential, "account_name"):
@@ -259,6 +259,8 @@ def _configure_credential(self, credential):
             self._credential_policy = credential
         elif isinstance(credential, AzureSasCredential):
             self._credential_policy = AzureSasCredentialPolicy(credential)
+        elif isinstance(credential, AzureNamedKeyCredential):
+            self._credential_policy = SharedKeyCredentialPolicy(credential)
         elif credential is not None:
             raise TypeError("Unsupported credential: {}".format(credential))
 
@@ -344,32 +346,13 @@ def __exit__(self, *args):  # pylint: disable=arguments-differ
         pass
 
 
-def format_shared_key_credential(account, credential):
-    if isinstance(credential, six.string_types):
-        if len(account) < 2:
-            raise ValueError(
-                "Unable to determine account name for shared key credential."
-            )
-        credential = {"account_name": account[0], "account_key": credential}
-    if isinstance(credential, dict):
-        if "account_name" not in credential:
-            raise ValueError("Shared key credential missing 'account_name")
-        if "account_key" not in credential:
-            raise ValueError("Shared key credential missing 'account_key")
-        return SharedKeyCredentialPolicy(**credential)
-    return credential
-
-
 def parse_connection_str(conn_str, credential, keyword_args):
     conn_settings = parse_connection_string(conn_str)
     primary = None
     secondary = None
     if not credential:
         try:
-            credential = {
-                "account_name": conn_settings["accountname"],
-                "account_key": conn_settings["accountkey"],
-            }
+            credential = AzureNamedKeyCredential(name=conn_settings["accountname"], key=conn_settings["accountkey"])
         except KeyError:
             credential = conn_settings.get("sharedaccesssignature")
             # if "sharedaccesssignature" in conn_settings:

sdk/tables/azure-data-tables/azure/data/tables/_shared_access_signature.py

@@ -28,17 +28,15 @@ class SharedAccessSignature(object):
     generate_*_shared_access_signature method directly.
     """
 
-    def __init__(self, account_name, account_key, x_ms_version=DEFAULT_X_MS_VERSION):
+    def __init__(self, credential, x_ms_version=DEFAULT_X_MS_VERSION):
         """
-        :param str account_name:
-            The storage account name used to generate the shared access signatures.
-        :param str account_key:
-            The access key to generate the shares access signatures.
+        :param credential: The credential used for authenticating requests
+        :type credential: :class:`~azure.core.credentials.NamedKeyCredential`
         :param str x_ms_version:
             The service version used to generate the shared access signatures.
         """
-        self.account_name = account_name
-        self.account_key = account_key
+        self.account_name = credential.named_key.name
+        self.account_key = credential.named_key.key
         self.x_ms_version = x_ms_version
 
     def generate_account(

sdk/tables/azure-data-tables/azure/data/tables/_table_client.py

@@ -50,7 +50,7 @@ def __init__(
         self,
         account_url,  # type: str
         table_name,  # type: str
-        credential=None,  # type: str
+        credential=None,  # type: Union[AzureNamedKeyCredential, AzureSasCredential]
         **kwargs  # type: Any
     ):
         # type: (...) -> None
@@ -66,8 +66,9 @@ def __init__(
             account URL already has a SAS token, or the connection string already has shared
             access key values. The value can be a SAS token string or an account shared access
             key.
-        :type credential: str
-
+        :type credential:
+            :class:`~azure.core.credentials.AzureNamedKeyCredential` or
+            :class:`~azure.core.credentials.AzureSasCredential`
         :returns: None
         """
         if not table_name:

sdk/tables/azure-data-tables/azure/data/tables/_table_service_client.py

@@ -36,7 +36,9 @@ class TableServiceClient(TablesBaseClient):
             account URL already has a SAS token, or the connection string already has shared
             access key values. The value can be a SAS token string or an account shared access
             key.
-        :type credential: str
+        :type credential:
+            :class:`~azure.core.credentials.AzureNamedKeyCredential` or
+            :class:`~azure.core.credentials.AzureSasCredential`
         :returns: None
 
         .. admonition:: Example:

sdk/tables/azure-data-tables/azure/data/tables/_table_shared_access_signature.py

@@ -3,7 +3,7 @@
 # Licensed under the MIT License. See License.txt in the project root for
 # license information.
 # --------------------------------------------------------------------------
-from typing import Union
+from typing import Union, Any
 
 from ._models import AccountSasPermissions
 from ._common_conversion import _sign_string
@@ -17,8 +17,7 @@
 
 
 def generate_account_sas(
-    account_name,  # type:str
-    account_key,  # type:str
+    credential,  # type: AzureNamedKeyCredential
     resource_types,  # type:ResourceTypes
     permission,  # type:Union[str,AccountSasPermissions]
     expiry,  # type:Union[datetime,str]
@@ -29,10 +28,8 @@ def generate_account_sas(
     Generates a shared access signature for the table service.
     Use the returned signature with the sas_token parameter of TableService.
 
-    :param account_name: Account name
-    :type account_name: str
-    :param account_key: Account key
-    :type account_key: str
+    :param credential: Credential for the Azure account
+    :type credential: :class:`~azure.core.credentials.AzureNamedKeyCredential`
     :param resource_types:
         Specifies the resource types that are accessible with the account SAS.
     :type resource_types: ResourceTypes
@@ -70,11 +67,11 @@ def generate_account_sas(
     :return: A Shared Access Signature (sas) token.
     :rtype: str
     """
-    _validate_not_none("account_name", account_name)
-    _validate_not_none("account_key", account_key)
+    _validate_not_none("account_name", credential.named_key.name)
+    _validate_not_none("account_key", credential.named_key.key)
     if permission is str:
         permission = AccountSasPermissions.from_string(permission=permission)
-    sas = TableSharedAccessSignature(account_name, account_key)
+    sas = TableSharedAccessSignature(credential)
     return sas.generate_account(
         "t",
         resource_types,
@@ -87,8 +84,7 @@ def generate_account_sas(
 
 
 def generate_table_sas(
-    account_name,  # type: str
-    account_key,  # type: str
+    credential,  # type: AzureNamedKeyCredential
     table_name,  # type: str
     **kwargs  # type: Any
 ):  # type: (...) -> str
@@ -143,7 +139,7 @@ def generate_table_sas(
     :rtype: str
     """
 
-    sas = TableSharedAccessSignature(account_name, account_key)
+    sas = TableSharedAccessSignature(credential)
     return sas.generate_table(
         table_name=table_name,
         permission=kwargs.pop("permission", None),
@@ -168,17 +164,13 @@ class TableSharedAccessSignature(SharedAccessSignature):
     generate_*_shared_access_signature method directly.
     """
 
-    def __init__(self, account_name, account_key):
+    def __init__(self, credential):
         """
-        :param account_name:
-            The storage account name used to generate the shared access signatures.
-        :type account_name: str
-        :param account_key:
-            The access key to generate the shares access signatures.
-        :type account_key: str
+        :param credential: The credential used for authenticating requests
+        :type credential: :class:`~azure.core.credentials.NamedKeyCredential`
         """
         super(TableSharedAccessSignature, self).__init__(
-            account_name, account_key, x_ms_version=X_MS_VERSION
+            credential, x_ms_version=X_MS_VERSION
         )
 
     def generate_table(

sdk/tables/azure-data-tables/azure/data/tables/aio/_base_client_async.py

@@ -4,10 +4,10 @@
 # license information.
 # --------------------------------------------------------------------------
 
-from typing import Any, List, Mapping
+from typing import Any, List, Mapping, Optional, Union
 from uuid import uuid4
 
-from azure.core.credentials import AzureSasCredential
+from azure.core.credentials import AzureSasCredential, AzureNamedKeyCredential
 from azure.core.pipeline.policies import (
     ContentDecodePolicy,
     AsyncBearerTokenCredentialPolicy,
@@ -19,7 +19,7 @@
     AzureSasCredentialPolicy,
     RequestIdPolicy,
     CustomHookPolicy,
-    NetworkTraceLoggingPolicy
+    NetworkTraceLoggingPolicy,
 )
 from azure.core.pipeline.transport import (
     AsyncHttpTransport,
@@ -40,9 +40,9 @@ class AsyncTablesBaseClient(AccountHostsMixin):
 
     def __init__(
         self,
-        account_url,  # type: str
-        credential=None,  # type: str
-        **kwargs  # type: Any
+        account_url: str,
+        credential: Optional[Union[AzureSasCredential, AzureNamedKeyCredential]] = None,
+        **kwargs: Any
     ):
         # type: (...) -> None
         super(AsyncTablesBaseClient, self).__init__(account_url, credential=credential, **kwargs)
@@ -77,6 +77,8 @@ def _configure_credential(self, credential):
             self._credential_policy = credential
         elif isinstance(credential, AzureSasCredential):
             self._credential_policy = AzureSasCredentialPolicy(credential)
+        elif isinstance(credential, AzureNamedKeyCredential):
+            self._credential_policy = SharedKeyCredentialPolicy(credential)
         elif credential is not None:
             raise TypeError("Unsupported credential: {}".format(credential))
 

sdk/tables/azure-data-tables/azure/data/tables/aio/_table_client_async.py

@@ -11,7 +11,7 @@
     from urlparse import urlparse  # type: ignore
     from urllib2 import unquote  # type: ignore
 
-from azure.core.credentials import AzureSasCredential
+from azure.core.credentials import AzureNamedKeyCredential, AzureSasCredential
 from azure.core.async_paging import AsyncItemPaged
 from azure.core.exceptions import ResourceNotFoundError, HttpResponseError
 from azure.core.tracing.decorator import distributed_trace
@@ -43,7 +43,7 @@ def __init__(
         self,
         account_url: str,
         table_name: str,
-        credential: Optional[Union[AzureSasCredential]] = None,
+        credential: Optional[Union[AzureSasCredential, AzureNamedKeyCredential]] = None,
         **kwargs
     ) -> None:
         """Create TableClient from a Credential.
@@ -58,7 +58,9 @@ def __init__(
             account URL already has a SAS token, or the connection string already has shared
             access key values. The value can be a SAS token string or an account shared access
             key.
-        :type credential: str
+        :type credential:
+            :class:`~azure.core.credentials.AzureNamedKeyCredential` or
+            :class:`~azure.core.credentials.AzureSasCredential`
 
         :returns: None
         """
@@ -109,7 +111,7 @@ def from_connection_string(
     def from_table_url(
         cls,
         table_url: str,
-        credential: Optional[Union[AzureSasCredential]] = None,
+        credential: Optional[Union[AzureSasCredential, AzureNamedKeyCredential]] = None,
         **kwargs
     ) -> 'TableClient':
         """A client to interact with a specific Table.
@@ -120,7 +122,9 @@ def from_table_url(
             The credentials with which to authenticate. This is optional if the
             account URL already has a SAS token. The value can be a SAS token string, an account
             shared access key.
-        :type credential: str
+        :type credential:
+            :class:`~azure.core.credentials.AzureNamedKeyCredential` or
+            :class:`~azure.core.credentials.AzureSasCredential`
         :returns: A table client.
         :rtype: :class:`~azure.data.tables.TableClient`
         """