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-rw-r--r--docs/admin_api/user_admin_api.rst17
-rw-r--r--synapse/handlers/deactivate_account.py1
-rw-r--r--synapse/rest/client/v1/admin.py13
-rw-r--r--synapse/storage/registration.py4
4 files changed, 31 insertions, 4 deletions
diff --git a/docs/admin_api/user_admin_api.rst b/docs/admin_api/user_admin_api.rst
index 1c9c5a6bde..d17121a188 100644
--- a/docs/admin_api/user_admin_api.rst
+++ b/docs/admin_api/user_admin_api.rst
@@ -44,13 +44,26 @@ Deactivate Account
 
 This API deactivates an account. It removes active access tokens, resets the
 password, and deletes third-party IDs (to prevent the user requesting a
-password reset).
+password reset). It can also mark the user as GDPR-erased (stopping their data
+from distributed further, and deleting it entirely if there are no other
+references to it).
 
 The api is::
 
     POST /_matrix/client/r0/admin/deactivate/<user_id>
 
-including an ``access_token`` of a server admin, and an empty request body.
+with a body of:
+
+.. code:: json
+
+    {
+        "erase": true
+    }
+
+including an ``access_token`` of a server admin.
+
+The erase parameter is optional and defaults to 'false'.
+An empty body may be passed for backwards compatibility.
 
 
 Reset password
diff --git a/synapse/handlers/deactivate_account.py b/synapse/handlers/deactivate_account.py
index a18d95397c..a84b7b8b80 100644
--- a/synapse/handlers/deactivate_account.py
+++ b/synapse/handlers/deactivate_account.py
@@ -47,6 +47,7 @@ class DeactivateAccountHandler(BaseHandler):
 
         Args:
             user_id (str): ID of user to be deactivated
+            erase_data (bool): whether to GDPR-erase the user's data
 
         Returns:
             Deferred
diff --git a/synapse/rest/client/v1/admin.py b/synapse/rest/client/v1/admin.py
index ddaedb2a8c..8fb08dc526 100644
--- a/synapse/rest/client/v1/admin.py
+++ b/synapse/rest/client/v1/admin.py
@@ -16,6 +16,8 @@
 
 from twisted.internet import defer
 
+from six.moves import http_client
+
 from synapse.api.constants import Membership
 from synapse.api.errors import AuthError, SynapseError, Codes, NotFoundError
 from synapse.types import UserID, create_requester
@@ -247,6 +249,15 @@ class DeactivateAccountRestServlet(ClientV1RestServlet):
 
     @defer.inlineCallbacks
     def on_POST(self, request, target_user_id):
+        body = parse_json_object_from_request(request, allow_empty_body=True)
+        erase = body.get("erase", False)
+        if not isinstance(erase, bool):
+            raise SynapseError(
+                http_client.BAD_REQUEST,
+                "Param 'erase' must be a boolean, if given",
+                Codes.BAD_JSON,
+            )
+
         UserID.from_string(target_user_id)
         requester = yield self.auth.get_user_by_req(request)
         is_admin = yield self.auth.is_server_admin(requester.user)
@@ -255,7 +266,7 @@ class DeactivateAccountRestServlet(ClientV1RestServlet):
             raise AuthError(403, "You are not a server admin")
 
         yield self._deactivate_account_handler.deactivate_account(
-            target_user_id, False,
+            target_user_id, erase,
         )
         defer.returnValue((200, {}))
 
diff --git a/synapse/storage/registration.py b/synapse/storage/registration.py
index 9c9cf46e7f..0d18f6d869 100644
--- a/synapse/storage/registration.py
+++ b/synapse/storage/registration.py
@@ -623,7 +623,9 @@ class RegistrationStore(RegistrationWorkerStore,
         Removes the given user to the table of users who need to be parted from all the
         rooms they're in, effectively marking that user as fully deactivated.
         """
-        return self._simple_delete_one(
+        # XXX: This should be simple_delete_one but we failed to put a unique index on
+        # the table, so somehow duplicate entries have ended up in it.
+        return self._simple_delete(
             "users_pending_deactivation",
             keyvalues={
                 "user_id": user_id,