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-rw-r--r--changelog.d/7085.feature1
-rw-r--r--docs/admin_api/user_admin_api.rst6
-rw-r--r--synapse/handlers/set_password.py41
-rw-r--r--synapse/rest/admin/users.py6
-rw-r--r--synapse/rest/client/v2_alpha/account.py5
5 files changed, 39 insertions, 20 deletions
diff --git a/changelog.d/7085.feature b/changelog.d/7085.feature
new file mode 100644
index 0000000000..df6d0f990d
--- /dev/null
+++ b/changelog.d/7085.feature
@@ -0,0 +1 @@
+Add an optional parameter to control whether other sessions are logged out when a user's password is modified.
diff --git a/docs/admin_api/user_admin_api.rst b/docs/admin_api/user_admin_api.rst
index 6b02d963e6..9ce10119ff 100644
--- a/docs/admin_api/user_admin_api.rst
+++ b/docs/admin_api/user_admin_api.rst
@@ -38,6 +38,7 @@ The parameter ``threepids`` is optional.
 The parameter ``avatar_url`` is optional.
 The parameter ``admin`` is optional and defaults to 'false'.
 The parameter ``deactivated`` is optional and defaults to 'false'.
+The parameter ``password`` is optional. If provided the user's password is updated and all devices are logged out.
 If the user already exists then optional parameters default to the current value.
 
 List Accounts
@@ -168,11 +169,14 @@ with a body of:
 .. code:: json
 
    {
-       "new_password": "<secret>"
+       "new_password": "<secret>",
+       "logout_devices": true,
    }
 
 including an ``access_token`` of a server admin.
 
+The parameter ``new_password`` is required.
+The parameter ``logout_devices`` is optional and defaults to ``true``.
 
 Get whether a user is a server administrator or not
 ===================================================
diff --git a/synapse/handlers/set_password.py b/synapse/handlers/set_password.py
index d90c9e0108..12657ca698 100644
--- a/synapse/handlers/set_password.py
+++ b/synapse/handlers/set_password.py
@@ -13,10 +13,12 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 import logging
+from typing import Optional
 
 from twisted.internet import defer
 
 from synapse.api.errors import Codes, StoreError, SynapseError
+from synapse.types import Requester
 
 from ._base import BaseHandler
 
@@ -32,14 +34,17 @@ class SetPasswordHandler(BaseHandler):
         self._device_handler = hs.get_device_handler()
 
     @defer.inlineCallbacks
-    def set_password(self, user_id, newpassword, requester=None):
+    def set_password(
+        self,
+        user_id: str,
+        new_password: str,
+        logout_devices: bool,
+        requester: Optional[Requester] = None,
+    ):
         if not self.hs.config.password_localdb_enabled:
             raise SynapseError(403, "Password change disabled", errcode=Codes.FORBIDDEN)
 
-        password_hash = yield self._auth_handler.hash(newpassword)
-
-        except_device_id = requester.device_id if requester else None
-        except_access_token_id = requester.access_token_id if requester else None
+        password_hash = yield self._auth_handler.hash(new_password)
 
         try:
             yield self.store.user_set_password_hash(user_id, password_hash)
@@ -48,14 +53,18 @@ class SetPasswordHandler(BaseHandler):
                 raise SynapseError(404, "Unknown user", Codes.NOT_FOUND)
             raise e
 
-        # we want to log out all of the user's other sessions. First delete
-        # all his other devices.
-        yield self._device_handler.delete_all_devices_for_user(
-            user_id, except_device_id=except_device_id
-        )
-
-        # and now delete any access tokens which weren't associated with
-        # devices (or were associated with this device).
-        yield self._auth_handler.delete_access_tokens_for_user(
-            user_id, except_token_id=except_access_token_id
-        )
+        # Optionally, log out all of the user's other sessions.
+        if logout_devices:
+            except_device_id = requester.device_id if requester else None
+            except_access_token_id = requester.access_token_id if requester else None
+
+            # First delete all of their other devices.
+            yield self._device_handler.delete_all_devices_for_user(
+                user_id, except_device_id=except_device_id
+            )
+
+            # and now delete any access tokens which weren't associated with
+            # devices (or were associated with this device).
+            yield self._auth_handler.delete_access_tokens_for_user(
+                user_id, except_token_id=except_access_token_id
+            )
diff --git a/synapse/rest/admin/users.py b/synapse/rest/admin/users.py
index 80f959248d..8551ac19b8 100644
--- a/synapse/rest/admin/users.py
+++ b/synapse/rest/admin/users.py
@@ -221,8 +221,9 @@ class UserRestServletV2(RestServlet):
                     raise SynapseError(400, "Invalid password")
                 else:
                     new_password = body["password"]
+                    logout_devices = True
                     await self.set_password_handler.set_password(
-                        target_user.to_string(), new_password, requester
+                        target_user.to_string(), new_password, logout_devices, requester
                     )
 
             if "deactivated" in body:
@@ -536,9 +537,10 @@ class ResetPasswordRestServlet(RestServlet):
         params = parse_json_object_from_request(request)
         assert_params_in_dict(params, ["new_password"])
         new_password = params["new_password"]
+        logout_devices = params.get("logout_devices", True)
 
         await self._set_password_handler.set_password(
-            target_user_id, new_password, requester
+            target_user_id, new_password, logout_devices, requester
         )
         return 200, {}
 
diff --git a/synapse/rest/client/v2_alpha/account.py b/synapse/rest/client/v2_alpha/account.py
index dc837d6c75..631cc74cb4 100644
--- a/synapse/rest/client/v2_alpha/account.py
+++ b/synapse/rest/client/v2_alpha/account.py
@@ -265,8 +265,11 @@ class PasswordRestServlet(RestServlet):
 
         assert_params_in_dict(params, ["new_password"])
         new_password = params["new_password"]
+        logout_devices = params.get("logout_devices", True)
 
-        await self._set_password_handler.set_password(user_id, new_password, requester)
+        await self._set_password_handler.set_password(
+            user_id, new_password, logout_devices, requester
+        )
 
         return 200, {}