From be13e86b0977dc474cba9488a9bb011be7eba4df Mon Sep 17 00:00:00 2001
From: Bruno Windels <brunow@matrix.org>
Date: Tue, 28 Apr 2020 17:41:10 +0200
Subject: [PATCH 1/3] dont enable e2ee when inviting a 3pid

---
 src/components/views/dialogs/InviteDialog.js | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/src/components/views/dialogs/InviteDialog.js b/src/components/views/dialogs/InviteDialog.js
index a46fa0df07..a2a0eddd8e 100644
--- a/src/components/views/dialogs/InviteDialog.js
+++ b/src/components/views/dialogs/InviteDialog.js
@@ -577,10 +577,13 @@ export default class InviteDialog extends React.PureComponent {
         if (SettingsStore.getValue("feature_cross_signing")) {
             // Check whether all users have uploaded device keys before.
             // If so, enable encryption in the new room.
-            const client = MatrixClientPeg.get();
-            const allHaveDeviceKeys = await canEncryptToAllUsers(client, targetIds);
-            if (allHaveDeviceKeys) {
-                createRoomOptions.encryption = true;
+            const containsNonMatrixUsers = targets.some(t => !(t instanceof DirectoryMember));
+            if (!containsNonMatrixUsers) {
+                const client = MatrixClientPeg.get();
+                const allHaveDeviceKeys = await canEncryptToAllUsers(client, targetIds);
+                if (allHaveDeviceKeys) {
+                    createRoomOptions.encryption = true;
+                }
             }
         }
 

From a8205d21f1428bc58a7915270012110c9d90c28b Mon Sep 17 00:00:00 2001
From: Bruno Windels <brunow@matrix.org>
Date: Tue, 28 Apr 2020 18:38:54 +0200
Subject: [PATCH 2/3] targets can also contain RoomMember, so take the positive
 case rather

---
 src/components/views/dialogs/InviteDialog.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/components/views/dialogs/InviteDialog.js b/src/components/views/dialogs/InviteDialog.js
index a2a0eddd8e..759228babd 100644
--- a/src/components/views/dialogs/InviteDialog.js
+++ b/src/components/views/dialogs/InviteDialog.js
@@ -577,8 +577,8 @@ export default class InviteDialog extends React.PureComponent {
         if (SettingsStore.getValue("feature_cross_signing")) {
             // Check whether all users have uploaded device keys before.
             // If so, enable encryption in the new room.
-            const containsNonMatrixUsers = targets.some(t => !(t instanceof DirectoryMember));
-            if (!containsNonMatrixUsers) {
+            const has3PidMembers = targets.some(t => t instanceof ThreepidMember);
+            if (has3PidMembers) {
                 const client = MatrixClientPeg.get();
                 const allHaveDeviceKeys = await canEncryptToAllUsers(client, targetIds);
                 if (allHaveDeviceKeys) {

From c10969f520fbb8b2bbbbac9c3c8c8713e125c11f Mon Sep 17 00:00:00 2001
From: Bruno Windels <brunow@matrix.org>
Date: Wed, 29 Apr 2020 11:40:04 +0200
Subject: [PATCH 3/3] enable encryption when NOT inviting 3pids

---
 src/components/views/dialogs/InviteDialog.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/components/views/dialogs/InviteDialog.js b/src/components/views/dialogs/InviteDialog.js
index 759228babd..e48c6866bf 100644
--- a/src/components/views/dialogs/InviteDialog.js
+++ b/src/components/views/dialogs/InviteDialog.js
@@ -578,7 +578,7 @@ export default class InviteDialog extends React.PureComponent {
             // Check whether all users have uploaded device keys before.
             // If so, enable encryption in the new room.
             const has3PidMembers = targets.some(t => t instanceof ThreepidMember);
-            if (has3PidMembers) {
+            if (!has3PidMembers) {
                 const client = MatrixClientPeg.get();
                 const allHaveDeviceKeys = await canEncryptToAllUsers(client, targetIds);
                 if (allHaveDeviceKeys) {