Start of the client

src/_secureaccesstokenauthorizer/_plugin.py

@@ -34,6 +34,11 @@ from allmydata.interfaces import (
 
 from .api import (
     SecureAccessTokenAuthorizerStorageServer,
+    SecureAccessTokenAuthorizerStorageClient,
+)
+
+from ._storage_server import (
+    TOKEN_LENGTH,
 )
 
 @implementer(IAnnounceableStorageServer)
@@ -66,5 +71,8 @@ class SecureAccessTokenAuthorizer(object):
         )
 
 
-    def get_storage_client(self, configuration, announcement):
-        raise NotImplementedError()
+    def get_storage_client(self, configuration, announcement, get_rref):
+        return SecureAccessTokenAuthorizerStorageClient(
+            get_rref,
+            lambda: [b"x" * TOKEN_LENGTH],
+        )

src/_secureaccesstokenauthorizer/_storage_client.py

+# Copyright 2019 PrivateStorage.io, LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+A Tahoe-LAFS ``IStorageServer`` implementation which presents tokens
+per-call to prove authorization for writes and lease updates.
+
+This is the client part of a storage access protocol.  The server part is
+implemented in ``_storage_server.py``.
+"""
+
+import attr
+
+from zope.interface import (
+    implementer,
+)
+
+from allmydata.interfaces import (
+    IStorageServer,
+)
+
+@implementer(IStorageServer)
+@attr.s
+class SecureAccessTokenAuthorizerStorageClient(object):
+    """
+    XXX
+    """
+    _get_rref = attr.ib()
+    _get_tokens = attr.ib()
+
+    @property
+    def _rref(self):
+        return self._get_rref()
+
+    def get_version(self):
+        return self._rref.callRemote(
+            "get_version",
+        )
+
+    def allocate_buckets(
+            self,
+            storage_index,
+            renew_secret,
+            cancel_secret,
+            sharenums,
+            allocated_size,
+            canary,
+    ):
+        return self._rref.callRemote(
+            "allocate_buckets",
+            self._get_tokens(),
+            storage_index,
+            renew_secret,
+            cancel_secret,
+            sharenums,
+            allocated_size,
+            canary,
+        )

src/_secureaccesstokenauthorizer/_storage_server.py

@@ -15,6 +15,9 @@
 """
 A Tahoe-LAFS RIStorageServer-alike which authorizes writes and lease
 updates using a per-call token.
+
+This is the server part of a storage access protocol.  The client part is
+implemented in ``_storage_client.py``.
 """
 
 from zope.interface import (

src/_secureaccesstokenauthorizer/api.py

@@ -14,12 +14,16 @@
 
 __all__ = [
     "SecureAccessTokenAuthorizerStorageServer",
+    "SecureAccessTokenAuthorizerStorageClient",
     "SecureAccessTokenAuthorizer",
 ]
 
 from ._storage_server import (
     SecureAccessTokenAuthorizerStorageServer,
 )
+from ._storage_client import (
+    SecureAccessTokenAuthorizerStorageClient,
+)
 
 from ._plugin import (
     SecureAccessTokenAuthorizer,