Backported revision 1127632 from trunk

    Force non admins to supply a user_ctx in replication documents

    This is to prevent users deleting replication documents added by other users
    and to make it clear who triggers which replications.



git-svn-id: https://svn.apache.org/repos/asf/couchdb/branches/1.1.x@1127634 13f79535-47bb-0310-9956-ffa450edef68

3 files changed, 33 insertions, 18 deletions

diff --git a/src/couchdb/couch_js_functions.hrl b/src/couchdb/couch_js_functions.hrl
index 1e3ed4e9..d07eead5 100644
--- a/src/couchdb/couch_js_functions.hrl
+++ b/src/couchdb/couch_js_functions.hrl
@@ -182,12 +182,6 @@
             }
 
             if (newDoc.user_ctx) {
-                if (!isAdmin) {
-                    reportError('Delegated replications (use of the ' +
-                        '`user_ctx\\' property) can only be triggered by ' +
-                        'administrators.');
-                }
-
                 var user_ctx = newDoc.user_ctx;
 
                 if ((typeof user_ctx !== 'object') || (user_ctx === null)) {
@@ -204,24 +198,40 @@
                         'non-empty string or null.');
                 }
 
+                if (!isAdmin && (user_ctx.name !== userCtx.name)) {
+                    reportError('The given `user_ctx.name\\' is not valid');
+                }
+
                 if (user_ctx.roles && !isArray(user_ctx.roles)) {
                     reportError('The `user_ctx.roles\\' property must be ' +
                         'an array of strings.');
                 }
 
-                if (user_ctx.roles) {
+                if (!isAdmin && user_ctx.roles) {
                     for (var i = 0; i < user_ctx.roles.length; i++) {
                         var role = user_ctx.roles[i];
 
                         if (typeof role !== 'string' || role.length === 0) {
                             reportError('Roles must be non-empty strings.');
                         }
-                        if (role[0] === '_') {
-                            reportError('System roles (starting with an ' +
-                                'underscore) are not allowed.');
+                        if (userCtx.roles.indexOf(role) === -1) {
+                            reportError('Invalid role (`' + role +
+                                '\\') in the `user_ctx\\'');
                         }
                     }
                 }
+            } else {
+                if (!isAdmin) {
+                    reportError('The `user_ctx\\' property is missing (it is ' +
+                       'optional for admins only).');
+                }
+            }
+        } else {
+            if (!isAdmin) {
+                if (!oldDoc.user_ctx || (oldDoc.user_ctx.name !== userCtx.name)) {
+                    reportError('Replication documents can only be deleted by ' +
+                        'admins or by the users who created them.');
+                }
             }
         }
     }
diff --git a/src/couchdb/couch_rep.erl b/src/couchdb/couch_rep.erl
index 49a82e5d..fd323f7f 100644
--- a/src/couchdb/couch_rep.erl
+++ b/src/couchdb/couch_rep.erl
@@ -899,13 +899,14 @@ update_rep_doc(RepDb, #doc{body = {RepDocBody}} = RepDoc, KVs) ->
         RepDocBody,
         KVs
     ),
-    % might not succeed - when the replication doc is deleted right
-    % before this update (not an error)
-    couch_db:update_doc(
-        RepDb,
-        RepDoc#doc{body = {NewRepDocBody}},
-        []
-    ).
+    case NewRepDocBody of
+    RepDocBody ->
+        ok;
+    _ ->
+       % might not succeed - when the replication doc is deleted right
+       % before this update (not an error)
+        couch_db:update_doc(RepDb, RepDoc#doc{body = {NewRepDocBody}}, [])
+    end.
 
 % RFC3339 timestamps.
 % Note: doesn't include the time seconds fraction (RFC3339 says it's optional).
diff --git a/src/couchdb/couch_replication_manager.erl b/src/couchdb/couch_replication_manager.erl
index 6101c9c5..6537c8b2 100644
--- a/src/couchdb/couch_replication_manager.erl
+++ b/src/couchdb/couch_replication_manager.erl
@@ -253,7 +253,7 @@ process_update(State, {Change}) ->
 rep_user_ctx({RepDoc}) ->
     case get_value(<<"user_ctx">>, RepDoc) of
     undefined ->
-        #user_ctx{roles = [<<"_admin">>]};
+        #user_ctx{};
     {UserCtx} ->
         #user_ctx{
             name = get_value(<<"name">>, UserCtx, null),
@@ -307,6 +307,10 @@ start_replication(Server, {RepProps} = RepDoc, RepId, UserCtx, MaxRetries) ->
         ok = gen_server:call(Server, {triggered, RepId}, infinity),
         couch_rep:get_result(Pid, RepId, RepDoc, UserCtx);
     Error ->
+        couch_rep:update_rep_doc(
+            RepDoc,
+            [{<<"_replication_state">>, <<"error">>},
+                {<<"_replication_id">>, ?l2b(element(1, RepId))}]),
         keep_retrying(
             Server, RepId, RepDoc, UserCtx, Error, ?INITIAL_WAIT, MaxRetries)
     end.