From 80fc238bece3400c7b6349ddc3aad49b068f0ff1 Mon Sep 17 00:00:00 2001
From: Simon Frei <freisim93@gmail.com>
Date: Fri, 12 Feb 2021 22:51:29 +0100
Subject: [PATCH] all: Automatic/disabled folder-config when receive-encrypted
 (#7327)

---
 go.mod                                        |   1 -
 gui/default/index.html                        |   2 +-
 .../syncthing/core/syncthingController.js     |  24 +-
 .../syncthing/folder/editFolderModalView.html |   2 +-
 gui/default/untrusted/index.html              |   4 +-
 .../syncthing/core/syncthingController.js     |  45 +++-
 .../syncthing/folder/editFolderModalView.html |   8 +-
 lib/config/folderconfiguration.go             |   4 +
 lib/db/observed.go                            |   7 +-
 lib/db/structs.pb.go                          | 220 ++++++++++--------
 lib/model/model.go                            |  25 +-
 lib/model/model_test.go                       |   4 +-
 proto/lib/db/structs.proto                    |   5 +-
 13 files changed, 221 insertions(+), 130 deletions(-)

diff --git a/go.mod b/go.mod
index e89c8c520..4618e3b4b 100644
--- a/go.mod
+++ b/go.mod
@@ -48,7 +48,6 @@ require (
 	golang.org/x/sys v0.0.0-20201101102859-da207088b7d1
 	golang.org/x/text v0.3.4
 	golang.org/x/time v0.0.0-20200630173020-3af7569d3a1e
-	google.golang.org/protobuf v1.23.0
 )
 
 go 1.14
diff --git a/gui/default/index.html b/gui/default/index.html
index 300951fcb..c9aeb07b4 100644
--- a/gui/default/index.html
+++ b/gui/default/index.html
@@ -250,7 +250,7 @@
                 </div>
                 <div class="panel-footer clearfix">
                   <div class="pull-right">
-                    <button type="button" class="btn btn-sm btn-success" ng-click="addFolderAndShare(folderID, offeringDevice.label, deviceID)" ng-if="!folders[folderID]">
+                    <button type="button" class="btn btn-sm btn-success" ng-click="addFolderAndShare(folderID, pendingFolder, deviceID)" ng-if="!folders[folderID]">
                       <span class="fas fa-check"></span>&nbsp;<span translate>Add</span>
                     </button>
                     <button type="button" class="btn btn-sm btn-success" ng-click="shareFolderWithDevice(folderID, deviceID)" ng-if="folders[folderID]">
diff --git a/gui/default/syncthing/core/syncthingController.js b/gui/default/syncthing/core/syncthingController.js
index 7dbd09a1e..07e7e2394 100755
--- a/gui/default/syncthing/core/syncthingController.js
+++ b/gui/default/syncthing/core/syncthingController.js
@@ -51,6 +51,7 @@ angular.module('syncthing.core')
         $scope.globalChangeEvents = {};
         $scope.metricRates = false;
         $scope.folderPathErrors = {};
+        $scope.currentSharing = {};
         $scope.currentFolder = {};
         $scope.currentDevice = {};
         $scope.ignores = {
@@ -276,7 +277,8 @@ angular.module('syncthing.core')
                 arg.data.added.forEach(function (rejected) {
                     var offeringDevice = {
                         time: arg.time,
-                        label: rejected.folderLabel
+                        label: rejected.folderLabel,
+                        receiveEncrypted: rejected.receiveEncrypted,
                     };
                     console.log("rejected folder", rejected.folderID, "from device:", rejected.deviceID, offeringDevice);
 
@@ -1814,12 +1816,18 @@ angular.module('syncthing.core')
             $scope.currentFolder.path = pathJoin($scope.config.defaults.folder.path, newvalue);
         });
 
-        $scope.fsWatcherToggled = function () {
-            if ($scope.currentFolder.fsWatcherEnabled) {
-                $scope.currentFolder.rescanIntervalS = 3600;
-            } else {
-                $scope.currentFolder.rescanIntervalS = 60;
+        $scope.setFSWatcherIntervalDefault = function () {
+            var defaultRescanIntervals = [60, 3600];
+            if (defaultRescanIntervals.indexOf($scope.currentFolder.rescanIntervalS) === -1) {
+                return;
             }
+            var idx;
+            if ($scope.currentFolder.fsWatcherEnabled) {
+                idx = 1;
+            } else {
+                idx = 0;
+            }
+            $scope.currentFolder.rescanIntervalS = defaultRescanIntervals[idx];
         };
 
         $scope.loadFormIntoScope = function (form) {
@@ -1979,13 +1987,13 @@ angular.module('syncthing.core')
             });
         };
 
-        $scope.addFolderAndShare = function (folderID, folderLabel, device) {
+        $scope.addFolderAndShare = function (folderID, pendingFolder, device) {
             addFolderInit(folderID).then(function() {
                 $scope.currentFolder.viewFlags = {
                     importFromOtherDevice: true
                 };
                 $scope.currentSharing.selected[device] = true;
-                $scope.currentFolder.label = folderLabel;
+                $scope.currentFolder.label = pendingFolder.offeredBy[device].label;
                 editFolderModal();
             });
         };
diff --git a/gui/default/syncthing/folder/editFolderModalView.html b/gui/default/syncthing/folder/editFolderModalView.html
index 3ed21392b..9d1f532b2 100644
--- a/gui/default/syncthing/folder/editFolderModalView.html
+++ b/gui/default/syncthing/folder/editFolderModalView.html
@@ -198,7 +198,7 @@
               <div class="row">
                 <div class="col-md-6">
                   <label>
-                    <input type="checkbox" ng-model="currentFolder.fsWatcherEnabled" ng-change="fsWatcherToggled()" tooltip data-original-title="{{'Use notifications from the filesystem to detect changed items.' | translate }}">&nbsp;<span translate>Watch for Changes</span>
+                    <input type="checkbox" ng-model="currentFolder.fsWatcherEnabled" ng-change="setFSWatcherIntervalDefault()" tooltip data-original-title="{{'Use notifications from the filesystem to detect changed items.' | translate }}">&nbsp;<span translate>Watch for Changes</span>
                   </label>
                   <p translate class="help-block">Watching for changes discovers most changes without periodic scanning.</p>
                 </div>
diff --git a/gui/default/untrusted/index.html b/gui/default/untrusted/index.html
index f3c8857b4..6f595be4e 100644
--- a/gui/default/untrusted/index.html
+++ b/gui/default/untrusted/index.html
@@ -250,7 +250,7 @@
                 </div>
                 <div class="panel-footer clearfix">
                   <div class="pull-right">
-                    <button type="button" class="btn btn-sm btn-success" ng-click="addFolderAndShare(folderID, offeringDevice.label, deviceID)" ng-if="!folders[folderID]">
+                    <button type="button" class="btn btn-sm btn-success" ng-click="addFolderAndShare(folderID, pendingFolder, deviceID)" ng-if="!folders[folderID]">
                       <span class="fas fa-check"></span>&nbsp;<span translate>Add</span>
                     </button>
                     <button type="button" class="btn btn-sm btn-success" ng-click="shareFolderWithDevice(folderID, deviceID)" ng-if="folders[folderID]">
@@ -417,7 +417,7 @@
                             <span class="far fa-copy"></span>&nbsp;{{model[folder.id].localFiles | alwaysNumber | localeNumber}}&ensp;
                             <span class="far fa-folder"></span>&nbsp;{{model[folder.id].localDirectories | alwaysNumber | localeNumber}}&ensp;
                             <span class="far fa-hdd"></span>&nbsp;~{{model[folder.id].localBytes | binary}}B<!-- get rid of the annoying trailing whitespace
-                                                                                                            --><span ng-if="model[folder.id].ignorePatterns"><br/><i><small translate class="text-muted">Reduced by ignore patterns</small></i></span>
+                            --><span ng-if="model[folder.id].ignorePatterns"><br/><i><small translate class="text-muted">Reduced by ignore patterns</small></i></span>
                           </span>
                         </td>
                       </tr>
diff --git a/gui/default/untrusted/syncthing/core/syncthingController.js b/gui/default/untrusted/syncthing/core/syncthingController.js
index cf1756602..e72940513 100755
--- a/gui/default/untrusted/syncthing/core/syncthingController.js
+++ b/gui/default/untrusted/syncthing/core/syncthingController.js
@@ -51,6 +51,7 @@ angular.module('syncthing.core')
         $scope.globalChangeEvents = {};
         $scope.metricRates = false;
         $scope.folderPathErrors = {};
+        $scope.currentSharing = {};
         $scope.currentFolder = {};
         $scope.currentDevice = {};
         $scope.ignores = {
@@ -276,7 +277,8 @@ angular.module('syncthing.core')
                 arg.data.added.forEach(function (rejected) {
                     var offeringDevice = {
                         time: arg.time,
-                        label: rejected.folderLabel
+                        label: rejected.folderLabel,
+                        receiveEncrypted: rejected.receiveEncrypted,
                     };
                     console.log("rejected folder", rejected.folderID, "from device:", rejected.deviceID, offeringDevice);
 
@@ -1831,12 +1833,31 @@ angular.module('syncthing.core')
             $scope.currentFolder.path = pathJoin($scope.config.defaults.folder.path, newvalue);
         });
 
-        $scope.fsWatcherToggled = function () {
-            if ($scope.currentFolder.fsWatcherEnabled) {
-                $scope.currentFolder.rescanIntervalS = 3600;
-            } else {
-                $scope.currentFolder.rescanIntervalS = 60;
+        $scope.setFSWatcherIntervalDefault = function () {
+            var defaultRescanIntervals = [60, 3600, 3600*24];
+            if (defaultRescanIntervals.indexOf($scope.currentFolder.rescanIntervalS) === -1) {
+                return;
             }
+            var idx;
+            if ($scope.currentFolder.fsWatcherEnabled) {
+                idx = 1;
+            } else if ($scope.currentFolder.type === 'receiveencrypted') {
+                idx = 2;
+            } else {
+                idx = 0;
+            }
+            $scope.currentFolder.rescanIntervalS = defaultRescanIntervals[idx];
+        };
+
+        $scope.setDefaultsForFolderType = function () {
+            if ($scope.currentFolder.type === 'receiveencrypted') {
+                $scope.currentFolder.fsWatcherEnabled = false;
+                $scope.currentFolder.ignorePerms = true;
+                delete $scope.currentFolder.versioning;
+            } else {
+                $scope.currentFolder.fsWatcherEnabled = true;
+            }
+            $scope.setFSWatcherIntervalDefault();
         };
 
         $scope.loadFormIntoScope = function (form) {
@@ -1857,6 +1878,7 @@ angular.module('syncthing.core')
 
         function editFolderModal() {
             initVersioningEditing();
+            $scope.currentFolder._recvEnc = $scope.currentFolder.type === 'receiveencrypted';
             $scope.folderPathErrors = {};
             $scope.folderEditor.$setPristine();
             $('#editFolder').modal().one('shown.bs.tab', function (e) {
@@ -1996,13 +2018,20 @@ angular.module('syncthing.core')
             });
         };
 
-        $scope.addFolderAndShare = function (folderID, folderLabel, device) {
+        $scope.addFolderAndShare = function (folderID, pendingFolder, device) {
             addFolderInit(folderID).then(function() {
                 $scope.currentFolder.viewFlags = {
                     importFromOtherDevice: true
                 };
                 $scope.currentSharing.selected[device] = true;
-                $scope.currentFolder.label = folderLabel;
+                $scope.currentFolder.label = pendingFolder.offeredBy[device].label;
+                for (var k in pendingFolder.offeredBy) {
+                    if (pendingFolder.offeredBy[k].receiveEncrypted) {
+                        $scope.currentFolder.type = "receiveencrypted";
+                        $scope.setDefaultsForFolderType();
+                        break;
+                    }
+                }
                 editFolderModal();
             });
         };
diff --git a/gui/default/untrusted/syncthing/folder/editFolderModalView.html b/gui/default/untrusted/syncthing/folder/editFolderModalView.html
index 1aca62c8e..c8b16ca63 100644
--- a/gui/default/untrusted/syncthing/folder/editFolderModalView.html
+++ b/gui/default/untrusted/syncthing/folder/editFolderModalView.html
@@ -5,7 +5,7 @@
         <li class="active"><a data-toggle="tab" href="#folder-general"><span class="fas fa-cog"></span> <span translate>General</span></a></li>
         <li><a data-toggle="tab" href="#folder-sharing"><span class="fas fa-share-alt"></span> <span translate>Sharing</span></a></li>
         <li><a data-toggle="tab" href="#folder-versioning"><span class="fas fa-copy"></span> <span translate>File Versioning</span></a></li>
-        <li ng-if="!editingDefaults"><a data-toggle="tab" href="#folder-ignores"><span class="fas fa-filter"></span> <span translate>Ignore Patterns</span></a></li>
+        <li ng-if="!editingDefaults" ng-class="{'disabled': currentFolder._recvEnc}"><a ng-attr-data-toggle="{{ currentFolder._recvEnc ? undefined : 'tab'}}" href="{{currentFolder._recvEnc ? '#' : '#folder-ignores'}}"><span class="fas fa-filter"></span> <span translate>Ignore Patterns</span></a></li>
         <li><a data-toggle="tab" href="#folder-advanced"><span class="fas fa-cogs"></span> <span translate>Advanced</span></a></li>
       </ul>
       <div class="tab-content">
@@ -186,7 +186,7 @@
               <div class="row">
                 <div class="col-md-6">
                   <label>
-                    <input type="checkbox" ng-model="currentFolder.fsWatcherEnabled" ng-change="fsWatcherToggled()" tooltip data-original-title="{{'Use notifications from the filesystem to detect changed items.' | translate }}">&nbsp;<span translate>Watch for Changes</span>
+                    <input type="checkbox" ng-model="currentFolder.fsWatcherEnabled" ng-change="setFSWatcherIntervalDefault()" tooltip data-original-title="{{'Use notifications from the filesystem to detect changed items.' | translate }}">&nbsp;<span translate>Watch for Changes</span>
                   </label>
                   <p translate class="help-block">Watching for changes discovers most changes without periodic scanning.</p>
                 </div>
@@ -205,7 +205,7 @@
             <div class="col-md-6 form-group">
               <label translate>Folder Type</label>
               &nbsp;<a href="https://docs.syncthing.net/users/foldertypes.html" target="_blank"><span class="fas fa-question-circle"></span>&nbsp;<span translate>Help</span></a>
-              <select class="form-control" ng-model="currentFolder.type" ng-disabled="editingExisting && currentFolder.type === 'receiveencrypted'">
+              <select class="form-control" ng-change="setDefaultsForFolderType()" ng-model="currentFolder.type" ng-disabled="editingExisting && currentFolder.type === 'receiveencrypted'">
                 <option value="sendreceive" translate>Send &amp; Receive</option>
                 <option value="sendonly" translate>Send Only</option>
                 <option value="receiveonly" translate>Receive Only</option>
@@ -255,7 +255,7 @@
             </div>
             <div class="col-md-6 form-group">
               <label>
-                <input type="checkbox" ng-model="currentFolder.ignorePerms" /> <span translate>Ignore Permissions</span>
+                <input type="checkbox" ng-disabled="currentFolder._recvEnc" ng-model="currentFolder.ignorePerms" /> <span translate>Ignore Permissions</span>
               </label>
               <p translate class="help-block">
                 Disables comparing and syncing file permissions. Useful on systems with nonexistent or custom permissions (e.g. FAT, exFAT, Synology, Android).
diff --git a/lib/config/folderconfiguration.go b/lib/config/folderconfiguration.go
index 02d22c5b3..8a91c67a7 100644
--- a/lib/config/folderconfiguration.go
+++ b/lib/config/folderconfiguration.go
@@ -212,6 +212,10 @@ func (f *FolderConfiguration) prepare(myID protocol.DeviceID, existingDevices ma
 	} else if f.MaxConcurrentWrites > maxConcurrentWritesLimit {
 		f.MaxConcurrentWrites = maxConcurrentWritesLimit
 	}
+
+	if f.Type == FolderTypeReceiveEncrypted {
+		f.IgnorePerms = true
+	}
 }
 
 // RequiresRestartOnly returns a copy with only the attributes that require
diff --git a/lib/db/observed.go b/lib/db/observed.go
index 996a3e711..606029580 100644
--- a/lib/db/observed.go
+++ b/lib/db/observed.go
@@ -66,14 +66,15 @@ func (db *Lowlevel) PendingDevices() (map[protocol.DeviceID]ObservedDevice, erro
 	return res, nil
 }
 
-func (db *Lowlevel) AddOrUpdatePendingFolder(id, label string, device protocol.DeviceID) error {
+func (db *Lowlevel) AddOrUpdatePendingFolder(id, label string, device protocol.DeviceID, receiveEncrypted bool) error {
 	key, err := db.keyer.GeneratePendingFolderKey(nil, device[:], []byte(id))
 	if err != nil {
 		return err
 	}
 	of := ObservedFolder{
-		Time:  time.Now().Round(time.Second),
-		Label: label,
+		Time:             time.Now().Round(time.Second),
+		Label:            label,
+		ReceiveEncrypted: receiveEncrypted,
 	}
 	bs, err := of.Marshal()
 	if err != nil {
diff --git a/lib/db/structs.pb.go b/lib/db/structs.pb.go
index 7cd82c95d..b7507b6c9 100644
--- a/lib/db/structs.pb.go
+++ b/lib/db/structs.pb.go
@@ -400,8 +400,9 @@ func (m *VersionListDeprecated) XXX_DiscardUnknown() {
 var xxx_messageInfo_VersionListDeprecated proto.InternalMessageInfo
 
 type ObservedFolder struct {
-	Time  time.Time `protobuf:"bytes,1,opt,name=time,proto3,stdtime" json:"time" xml:"time"`
-	Label string    `protobuf:"bytes,2,opt,name=label,proto3" json:"label" xml:"label"`
+	Time             time.Time `protobuf:"bytes,1,opt,name=time,proto3,stdtime" json:"time" xml:"time"`
+	Label            string    `protobuf:"bytes,2,opt,name=label,proto3" json:"label" xml:"label"`
+	ReceiveEncrypted bool      `protobuf:"varint,3,opt,name=receive_encrypted,json=receiveEncrypted,proto3" json:"receiveEncrypted" xml:"receiveEncrypted"`
 }
 
 func (m *ObservedFolder) Reset()         { *m = ObservedFolder{} }
@@ -493,96 +494,98 @@ func init() {
 func init() { proto.RegisterFile("lib/db/structs.proto", fileDescriptor_5465d80e8cba02e3) }
 
 var fileDescriptor_5465d80e8cba02e3 = []byte{
-	// 1415 bytes of a gzipped FileDescriptorProto
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+	0x3f, 0x93, 0x2b, 0x18, 0x48, 0x42, 0xc2, 0xd6, 0x5b, 0x6a, 0x42, 0x28, 0xea, 0x28, 0xc5, 0xd5,
+	0xfc, 0xa6, 0x09, 0x55, 0x30, 0xf9, 0xc9, 0x40, 0x67, 0x37, 0x43, 0xcf, 0x8f, 0x99, 0x9b, 0xa8,
+	0x7a, 0x32, 0x7e, 0x3b, 0x0c, 0x06, 0x27, 0xd3, 0xaa, 0x27, 0x76, 0xc9, 0xe4, 0x87, 0x32, 0x9a,
+	0xbe, 0x1a, 0xed, 0x86, 0x09, 0x37, 0x2f, 0xa2, 0xa9, 0x6d, 0x3f, 0x60, 0x1c, 0x3e, 0x39, 0x53,
+	0x16, 0x1e, 0xa6, 0x58, 0x02, 0xfa, 0x90, 0x60, 0xe9, 0x1e, 0x91, 0x4e, 0xf3, 0x63, 0x54, 0x95,
+	0xe7, 0x8c, 0x62, 0x9f, 0x71, 0xe8, 0xfe, 0x29, 0xeb, 0x3d, 0xf1, 0x26, 0x05, 0x58, 0xbf, 0x49,
+	0x01, 0xd3, 0x89, 0x8a, 0x44, 0xf3, 0x0a, 0x9a, 0x55, 0xb3, 0x8d, 0xc3, 0xf7, 0x6c, 0xca, 0x3a,
+	0x0f, 0x73, 0x55, 0x61, 0xf9, 0x5c, 0x55, 0x80, 0xce, 0xa2, 0x29, 0xe6, 0x07, 0xb9, 0x70, 0xcb,
+	0x90, 0xe1, 0xdc, 0x7f, 0x09, 0x37, 0x8b, 0xd7, 0xfa, 0x6d, 0xa3, 0x29, 0x67, 0x90, 0xb0, 0xec,
+	0xe3, 0x58, 0x17, 0x75, 0x00, 0x20, 0xbf, 0x6c, 0x61, 0x11, 0x2a, 0xd1, 0xb1, 0x2f, 0xc1, 0xf4,
+	0x4b, 0x7e, 0x09, 0xb6, 0x50, 0x45, 0xee, 0x32, 0x1d, 0xdf, 0x83, 0x8f, 0x40, 0xcd, 0x5a, 0x3b,
+	0x4c, 0xf1, 0xac, 0xdc, 0x4f, 0xe0, 0xcb, 0x38, 0x2b, 0x09, 0x9b, 0x9e, 0x4e, 0x94, 0x01, 0xa2,
+	0x5b, 0x34, 0x93, 0x6a, 0x9e, 0x90, 0x58, 0x71, 0x90, 0x98, 0xaf, 0x32, 0x47, 0x54, 0x83, 0x7c,
+	0x6d, 0xa0, 0x8a, 0x94, 0xc7, 0x16, 0x4b, 0xcc, 0x2b, 0x68, 0xda, 0x05, 0x43, 0x75, 0x08, 0x12,
+	0xbb, 0x91, 0x74, 0xe7, 0x8d, 0x21, 0x19, 0xba, 0x56, 0x60, 0x12, 0xaa, 0x60, 0x31, 0x54, 0xdc,
+	0x98, 0xd9, 0xd9, 0xce, 0x58, 0x92, 0x43, 0x45, 0x41, 0xfa, 0x6e, 0x94, 0x4d, 0x68, 0xe6, 0x21,
+	0xdf, 0x4c, 0xa2, 0xb3, 0x85, 0x2d, 0x6c, 0x9d, 0xf5, 0x63, 0x26, 0x17, 0xa5, 0x93, 0xdd, 0x69,
+	0x57, 0xd1, 0xb4, 0xac, 0x23, 0xbc, 0x5e, 0xcd, 0x5a, 0x12, 0x47, 0x92, 0xc8, 0xb1, 0xcd, 0x54,
+	0xe1, 0xe2, 0x4c, 0xd9, 0xc0, 0x2b, 0xe5, 0x83, 0xf2, 0x79, 0x23, 0x2e, 0x1f, 0x6a, 0x6b, 0xe3,
+	0x3a, 0x7d, 0xd1, 0x01, 0x4b, 0xf6, 0xd1, 0xd9, 0xc2, 0xce, 0x5a, 0x28, 0xc5, 0x67, 0xc7, 0xb6,
+	0xd7, 0xd7, 0x9f, 0xd9, 0x5e, 0x73, 0xb2, 0xf5, 0xb6, 0x2a, 0xca, 0xf3, 0x17, 0xd7, 0x63, 0x9b,
+	0xea, 0x5f, 0x06, 0x9a, 0xbf, 0xed, 0x70, 0x16, 0xef, 0x31, 0x6f, 0x23, 0x0a, 0x3c, 0x16, 0x9b,
+	0xb7, 0x50, 0x59, 0xfc, 0x2f, 0x51, 0xa5, 0x5f, 0x6a, 0xcb, 0x3f, 0x2d, 0xed, 0xec, 0x4f, 0x4b,
+	0xfb, 0x4e, 0xf6, 0xa7, 0xc5, 0x6a, 0xa8, 0xdf, 0x03, 0x7e, 0xfe, 0xf1, 0xf7, 0x7b, 0x8c, 0x3c,
+	0xfc, 0x1d, 0x1b, 0x14, 0x70, 0xd1, 0x7c, 0x81, 0xed, 0xb0, 0x00, 0xca, 0x5f, 0x91, 0xcd, 0x07,
+	0x80, 0x16, 0x14, 0x58, 0x84, 0x4a, 0xd4, 0xfc, 0x02, 0x2d, 0xc4, 0xcc, 0x65, 0xfe, 0x1e, 0xeb,
+	0xe4, 0xcb, 0x8b, 0xbc, 0x85, 0xf6, 0x30, 0xc5, 0xa7, 0x95, 0xf3, 0xa3, 0xc2, 0x0e, 0xb3, 0x08,
+	0x69, 0x9e, 0x75, 0x10, 0x7a, 0x8c, 0x4b, 0x7e, 0x29, 0x9c, 0x57, 0xf6, 0xd9, 0x89, 0x9f, 0x37,
+	0x5b, 0xf3, 0x27, 0x5f, 0x60, 0xcd, 0x5f, 0x43, 0x33, 0xb6, 0xe7, 0xc5, 0x8c, 0xcb, 0xc9, 0x58,
+	0x91, 0x7a, 0x51, 0x90, 0xbe, 0x3d, 0x65, 0x13, 0x9a, 0x79, 0xac, 0x6b, 0x4f, 0x9e, 0x36, 0x26,
+	0x0e, 0x9e, 0x36, 0x26, 0x9e, 0x1c, 0x36, 0x8c, 0x83, 0xc3, 0x86, 0xf1, 0xf0, 0xa8, 0x31, 0xf1,
+	0xf8, 0xa8, 0x61, 0x1c, 0x1c, 0x35, 0x26, 0x7e, 0x3d, 0x6a, 0x4c, 0x7c, 0x7e, 0xfe, 0x05, 0x76,
+	0x6b, 0xcf, 0x71, 0xa6, 0xe1, 0x98, 0x17, 0xfe, 0x0d, 0x00, 0x00, 0xff, 0xff, 0xbf, 0x3c, 0x81,
+	0x94, 0xda, 0x0e, 0x00, 0x00,
 }
 
 func (m *FileVersion) Marshal() (dAtA []byte, err error) {
@@ -1142,6 +1145,16 @@ func (m *ObservedFolder) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 	_ = i
 	var l int
 	_ = l
+	if m.ReceiveEncrypted {
+		i--
+		if m.ReceiveEncrypted {
+			dAtA[i] = 1
+		} else {
+			dAtA[i] = 0
+		}
+		i--
+		dAtA[i] = 0x18
+	}
 	if len(m.Label) > 0 {
 		i -= len(m.Label)
 		copy(dAtA[i:], m.Label)
@@ -1456,6 +1469,9 @@ func (m *ObservedFolder) ProtoSize() (n int) {
 	if l > 0 {
 		n += 1 + l + sovStructs(uint64(l))
 	}
+	if m.ReceiveEncrypted {
+		n += 2
+	}
 	return n
 }
 
@@ -3099,6 +3115,26 @@ func (m *ObservedFolder) Unmarshal(dAtA []byte) error {
 			}
 			m.Label = string(dAtA[iNdEx:postIndex])
 			iNdEx = postIndex
+		case 3:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field ReceiveEncrypted", wireType)
+			}
+			var v int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowStructs
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				v |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			m.ReceiveEncrypted = bool(v != 0)
 		default:
 			iNdEx = preIndex
 			skippy, err := skipStructs(dAtA[iNdEx:])
diff --git a/lib/model/model.go b/lib/model/model.go
index f77647e0c..f2bc888c0 100644
--- a/lib/model/model.go
+++ b/lib/model/model.go
@@ -1289,7 +1289,7 @@ func (m *model) ccHandleFolders(folders []protocol.Folder, deviceCfg config.Devi
 	tempIndexFolders := make([]string, 0, len(folders))
 	paused := make(map[string]struct{}, len(folders))
 	seenFolders := make(map[string]struct{}, len(folders))
-	updatedPending := make([]map[string]string, 0, len(folders))
+	updatedPending := make([]updatedPendingFolder, 0, len(folders))
 	deviceID := deviceCfg.DeviceID
 	for _, folder := range folders {
 		seenFolders[folder.ID] = struct{}{}
@@ -1304,14 +1304,16 @@ func (m *model) ccHandleFolders(folders []protocol.Folder, deviceCfg config.Devi
 				l.Infof("Ignoring folder %s from device %s since we are configured to", folder.Description(), deviceID)
 				continue
 			}
-			if err := m.db.AddOrUpdatePendingFolder(folder.ID, folder.Label, deviceID); err != nil {
+			recvEnc := len(ccDeviceInfos[folder.ID].local.EncryptionPasswordToken) > 0
+			if err := m.db.AddOrUpdatePendingFolder(folder.ID, folder.Label, deviceID, recvEnc); err != nil {
 				l.Warnf("Failed to persist pending folder entry to database: %v", err)
 			}
 			indexSenders.addPending(cfg, ccDeviceInfos[folder.ID])
-			updatedPending = append(updatedPending, map[string]string{
-				"folderID":    folder.ID,
-				"folderLabel": folder.Label,
-				"deviceID":    deviceID.String(),
+			updatedPending = append(updatedPending, updatedPendingFolder{
+				FolderID:         folder.ID,
+				FolderLabel:      folder.Label,
+				DeviceID:         deviceID,
+				ReceiveEncrypted: recvEnc,
 			})
 			// DEPRECATED: Only for backwards compatibility, should be removed.
 			m.evLogger.Log(events.FolderRejected, map[string]string{
@@ -2022,6 +2024,10 @@ func (m *model) LoadIgnores(folder string) ([]string, []string, error) {
 		}
 	}
 
+	if cfg.Type == config.FolderTypeReceiveEncrypted {
+		return nil, nil, nil
+	}
+
 	// On creation a new folder with ignore patterns validly has no marker yet.
 	if err := cfg.CheckPath(); err != nil && err != config.ErrMarkerMissing {
 		return nil, nil, err
@@ -3177,3 +3183,10 @@ func newFolderConfiguration(w config.Wrapper, id, label string, fsType fs.Filesy
 	fcfg.Path = path
 	return fcfg
 }
+
+type updatedPendingFolder struct {
+	FolderID         string            `json:"folderID"`
+	FolderLabel      string            `json:"folderLabel"`
+	DeviceID         protocol.DeviceID `json:"deviceID"`
+	ReceiveEncrypted bool              `json:"receiveEncrypted"`
+}
diff --git a/lib/model/model_test.go b/lib/model/model_test.go
index b7f3c830e..6e9ca3a32 100644
--- a/lib/model/model_test.go
+++ b/lib/model/model_test.go
@@ -4177,7 +4177,7 @@ func TestPendingFolder(t *testing.T) {
 
 	setDevice(t, w, config.DeviceConfiguration{DeviceID: device2})
 	pfolder := "default"
-	if err := m.db.AddOrUpdatePendingFolder(pfolder, pfolder, device2); err != nil {
+	if err := m.db.AddOrUpdatePendingFolder(pfolder, pfolder, device2, false); err != nil {
 		t.Fatal(err)
 	}
 	deviceFolders, err := m.PendingFolders(protocol.EmptyDeviceID)
@@ -4193,7 +4193,7 @@ func TestPendingFolder(t *testing.T) {
 
 	device3, err := protocol.DeviceIDFromString("AIBAEAQ-CAIBAEC-AQCAIBA-EAQCAIA-BAEAQCA-IBAEAQC-CAIBAEA-QCAIBA7")
 	setDevice(t, w, config.DeviceConfiguration{DeviceID: device3})
-	if err := m.db.AddOrUpdatePendingFolder(pfolder, pfolder, device3); err != nil {
+	if err := m.db.AddOrUpdatePendingFolder(pfolder, pfolder, device3, false); err != nil {
 		t.Fatal(err)
 	}
 	deviceFolders, err = m.PendingFolders(device2)
diff --git a/proto/lib/db/structs.proto b/proto/lib/db/structs.proto
index f422bc89d..c29f39a73 100644
--- a/proto/lib/db/structs.proto
+++ b/proto/lib/db/structs.proto
@@ -91,8 +91,9 @@ message VersionListDeprecated {
 }
 
 message ObservedFolder {
-    google.protobuf.Timestamp time  = 1 [(gogoproto.stdtime) = true, (gogoproto.nullable) = false];
-    string                    label = 2;
+    google.protobuf.Timestamp time              = 1 [(gogoproto.stdtime) = true, (gogoproto.nullable) = false];
+    string                    label             = 2;
+    bool                      receive_encrypted = 3;
 }
 
 message ObservedDevice {