feat: Sync Alice's verification on Bob's side

Author: Hocuri

src/chat.rs

@@ -5089,10 +5089,8 @@ pub(crate) enum SyncAction {
         chat_name: String,
         shared_secret: String,
     },
-    CreateInBroadcast {
-        chat_name: String,
-        shared_secret: String,
-    },
+    /// Mark the contact with the given fingerprint as verified by self.
+    MarkVerified,
     Rename(String),
     /// Set chat contacts by their addresses.
     SetContacts(Vec<String>),
@@ -5148,6 +5146,14 @@ impl Context {
                     SyncAction::Unblock => {
                         return contact::set_blocked(self, Nosync, contact_id, false).await;
                     }
+                    SyncAction::MarkVerified => {
+                        return contact::mark_contact_id_as_verified(
+                            self,
+                            contact_id,
+                            ContactId::SELF,
+                        )
+                        .await;
+                    }
                     _ => (),
                 }
                 ChatIdBlocked::get_for_contact(self, contact_id, Blocked::Request)
@@ -5179,8 +5185,9 @@ impl Context {
             SyncAction::Accept => chat_id.accept_ex(self, Nosync).await,
             SyncAction::SetVisibility(v) => chat_id.set_visibility_ex(self, Nosync, *v).await,
             SyncAction::SetMuted(duration) => set_muted_ex(self, Nosync, chat_id, *duration).await,
-            SyncAction::CreateOutBroadcast { .. } | SyncAction::CreateInBroadcast { .. } => {
-                // Create action should have been handled by handle_sync_create_chat() already
+            SyncAction::CreateOutBroadcast { .. } | SyncAction::MarkVerified => {
+                // Create action should have been handled by handle_sync_create_chat() already.
+                // MarkVerified action should have been handled by mark_contact_id_as_verified() already.
                 Err(anyhow!("sync_alter_chat({id:?}, {action:?}): Bad request."))
             }
             SyncAction::Rename(to) => rename_ex(self, Nosync, chat_id, to).await,
@@ -5208,25 +5215,6 @@ impl Context {
                 .await?;
                 return Ok(true);
             }
-            SyncAction::CreateInBroadcast {
-                chat_name,
-                shared_secret,
-            } => {
-                let chat_id = ChatId::create_multiuser_record(
-                    self,
-                    Chattype::InBroadcast,
-                    grpid,
-                    chat_name,
-                    Blocked::Not,
-                    ProtectionStatus::Unprotected,
-                    None,
-                    smeared_time(self),
-                )
-                .await?;
-                save_broadcast_shared_secret(self, chat_id, shared_secret).await?;
-
-                return Ok(true);
-            }
             _ => false,
         })
     }

src/chat/chat_tests.rs

@@ -3119,8 +3119,19 @@ async fn test_leave_broadcast_multidevice() -> Result<()> {
     alice.recv_msg_trash(&request).await;
     let answer = alice.pop_sent_msg().await;
     bob0.recv_msg(&answer).await;
+
+    // Sync Bob's verification of Alice:
+    sync(bob0, bob1).await;
+    // TODO uncommenting the next line creates a message "Can't decrypt outgoing messages, probably you're using DC on multiple devices without transferring your key"
+    // bob1.recv_msg(&request).await;
     bob1.recv_msg(&answer).await;
 
+    // The 1:1 chat should not be visible to the user on any of the devices.
+    // The contact should be marked as verified.
+    check_direct_chat_is_hidden_and_contact_is_verified(alice, bob0).await;
+    check_direct_chat_is_hidden_and_contact_is_verified(bob0, alice).await;
+    check_direct_chat_is_hidden_and_contact_is_verified(bob1, alice).await;
+
     tcm.section("Alice sends first message to broadcast.");
     let sent_msg = alice.send_text(alice_chat_id, "Hello!").await;
     let bob0_hello = bob0.recv_msg(&sent_msg).await;
@@ -3151,6 +3162,20 @@ async fn test_leave_broadcast_multidevice() -> Result<()> {
     Ok(())
 }
 
+async fn check_direct_chat_is_hidden_and_contact_is_verified(
+    t: &TestContext,
+    contact: &TestContext,
+) {
+    let contact = t.add_or_lookup_contact_no_key(contact).await;
+    if let Some(direct_chat) = ChatIdBlocked::lookup_by_contact(t, contact.id)
+        .await
+        .unwrap()
+    {
+        assert_eq!(direct_chat.blocked, Blocked::Yes);
+    }
+    assert!(contact.is_verified(t).await.unwrap());
+}
+
 /// Test that only the owner of the broadcast channel
 /// can send messages into the chat.
 ///

src/receive_imf.rs

@@ -3531,6 +3531,7 @@ async fn apply_out_broadcast_changes(
     } else if let Some(added_addr) = mime_parser.get_header(HeaderDef::ChatGroupMemberAdded) {
         // TODO this block can be removed,
         // now that all of Alice's devices get to know about Bob joining via Bob's QR message.
+        // TODO test if this creates some problems with duplicate member-added messages on Alice's device
         let contact = lookup_key_contact_by_address(context, added_addr, None).await?;
         if let Some(contact) = contact {
             better_msg.get_or_insert(

src/securejoin.rs

@@ -594,8 +594,6 @@ pub(crate) async fn observe_securejoin_on_other_device(
         inviter_progress(context, contact_id, 1000);
     }
 
-    // TODO not sure if I should add vb-request-with-auth here
-    // Actually, I'm not even sure why vg-request-with-auth is here - why do we create a 1:1 chat??
     if step == "vg-request-with-auth" || step == "vc-request-with-auth" {
         // This actually reflects what happens on the first device (which does the secure
         // join) and causes a subsequent "vg-member-added" message to create an unblocked

src/securejoin/bob.rs

@@ -10,7 +10,7 @@ use crate::contact::Origin;
 use crate::context::Context;
 use crate::events::EventType;
 use crate::key::self_fingerprint;
-use crate::log::info;
+use crate::log::{LogExt as _, info};
 use crate::message::{Message, Viewtype};
 use crate::mimeparser::{MimeMessage, SystemMessage};
 use crate::param::Param;
@@ -81,6 +81,13 @@ pub(super) async fn start_protocol(context: &Context, invite: QrInvite) -> Resul
             contact_id: invite.contact_id(),
             progress: JoinerProgress::RequestWithAuthSent.to_usize(),
         });
+
+        // Our second device won't be able to decrypt the outgoing message
+        // because it will be symmetrically encrypted with the AUTH token.
+        // So, we need to send a sync message:
+        let id = chat::SyncId::ContactFingerprint(invite.fingerprint().hex());
+        let action = chat::SyncAction::MarkVerified;
+        chat::sync(context, id, action).await.log_err(context).ok();
     } else {
         // Start the version 1 protocol and initialise the state.
         let has_key = context