ssb: The identity app now lets you switch out the server identity if you are an administrator.

apps/identity.json

@@ -1,5 +1,5 @@
 {
 	"type": "tildefriends-app",
 	"emoji": "🪪",
-	"previous": "&zxsmzdLKsiG/WZt/Gw7JOxepgypoktNNbIyWiyFiJVc=.sha256"
+	"previous": "&5kw/2PgcySwOYCmAkjHTR2xTkIx3i7UjQmtQ8MfgWw8=.sha256"
 }

apps/identity/app.js

@@ -1,5 +1,7 @@
 import * as tfrpc from '/tfrpc.js';
 
+const is_admin = core.user?.credentials?.permissions?.administration;
+
 tfrpc.register(async function get_private_key(id) {
 	return bip39Words(await ssb.getPrivateKey(id));
 });
@@ -15,6 +17,9 @@ tfrpc.register(async function delete_id(id) {
 tfrpc.register(async function reload() {
 	await main();
 });
+tfrpc.register(async function make_server(id) {
+	return await ssb.swapWithServerIdentity(id);
+});
 
 async function main() {
 	let ids = await ssb.getIdentities();
@@ -99,6 +104,16 @@ async function main() {
 					alert('Error deleting ID: ' + e);
 				}
 			}
+			handler.make_server = async function make_server(event) {
+				let id = event.srcElement.dataset.id;
+				try {
+					if (confirm('Are you sure you want to make "' + id + '" the server identity?\\n\\nFor it to take effect, you will need to both sign in again and restart Tilde Friends.')) {
+						await tfrpc.rpc.make_server(id);
+					}
+				} catch (e) {
+					alert('Error making server ID: ' + e);
+				}
+			}
 		</script>
 		<header class="w3-theme w3-padding"><h1>SSB Identity Management</h1></header>
 		<div class="w3-card-4 w3-margin">
@@ -117,13 +132,14 @@ async function main() {
 		<div class="w3-card-4 w3-margin">
 			<header class="w3-container w3-theme-l2"><h2>Identities</h2></header>
 			<ul class="w3-ul">` +
-			ids
+			(ids ?? [])
 				.map(
 					(
 						id
 					) => `<li style="overflow: hidden; text-wrap: nowrap; text-overflow: ellipsis">
 				<button onclick="handler.export_id(event)" data-id="${id}" class="w3-button w3-theme">Export Identity</button>
 				<button onclick="handler.delete_id(event)" data-id="${id}" class="w3-button w3-theme">Delete Identity</button>
+				${is_admin && id != server_id ? `<button onclick="handler.make_server(event)" data-id="${id}" class="w3-button w3-theme">Make Server Identity</button>` : ''}
 				${id}${id == server_id ? ' <div class="w3-tag w3-theme-l4 w3-round">🖥 local server</div>' : ''}
 			</li>`
 				)

core/core.js

@@ -692,6 +692,18 @@ async function getProcessBlob(blobId, key, options) {
 					);
 				}
 			};
+			imports.ssb.swapWithServerIdentity = function (id) {
+				if (
+					process.credentials &&
+					process.credentials.session &&
+					process.credentials.session.name
+				) {
+					return ssb.swapWithServerIdentity(
+						process.credentials.session.name,
+						id
+					);
+				}
+			};
 			imports.ssb.addEventListener = undefined;
 			imports.ssb.removeEventListener = undefined;
 			imports.ssb.getIdentityInfo = undefined;

src/ssb.js.c

@@ -360,6 +360,109 @@ static JSValue _tf_ssb_set_server_following_me(JSContext* context, JSValueConst
 	return result;
 }
 
+typedef struct _swap_with_server_identity_t
+{
+	char server_id[k_id_base64_len];
+	char id[k_id_base64_len];
+	JSValue promise[2];
+	char* error;
+	char user[];
+} swap_with_server_identity_t;
+
+static void _tf_ssb_swap_with_server_identity_work(tf_ssb_t* ssb, void* user_data)
+{
+	swap_with_server_identity_t* work = user_data;
+	if (tf_ssb_db_user_has_permission(ssb, work->user, "administration"))
+	{
+		sqlite3* db = tf_ssb_acquire_db_writer(ssb);
+		char* error = NULL;
+		if (sqlite3_exec(db, "BEGIN TRANSACTION", NULL, NULL, &error) == SQLITE_OK)
+		{
+			sqlite3_stmt* statement = NULL;
+			if (sqlite3_prepare(db, "UPDATE identities SET user = ? WHERE user = ? AND '@' || public_key = ?", -1, &statement, NULL) == SQLITE_OK)
+			{
+				if (sqlite3_bind_text(statement, 1, work->user, -1, NULL) == SQLITE_OK && sqlite3_bind_text(statement, 2, ":admin", -1, NULL) == SQLITE_OK &&
+					sqlite3_bind_text(statement, 3, work->server_id, -1, NULL) == SQLITE_OK && sqlite3_step(statement) == SQLITE_DONE && sqlite3_changes(db) == 1 &&
+					sqlite3_reset(statement) == SQLITE_OK && sqlite3_bind_text(statement, 1, ":admin", -1, NULL) == SQLITE_OK &&
+					sqlite3_bind_text(statement, 2, work->user, -1, NULL) == SQLITE_OK && sqlite3_bind_text(statement, 3, work->id, -1, NULL) == SQLITE_OK &&
+					sqlite3_step(statement) == SQLITE_DONE && sqlite3_changes(db) == 1)
+				{
+					error = NULL;
+					if (sqlite3_exec(db, "COMMIT TRANSACTION", NULL, NULL, &error) != SQLITE_OK)
+					{
+						work->error = error ? tf_strdup(error) : tf_strdup(sqlite3_errmsg(db));
+					}
+				}
+				else
+				{
+					work->error = tf_strdup(sqlite3_errmsg(db) ? sqlite3_errmsg(db) : "swap failed");
+				}
+				sqlite3_finalize(statement);
+			}
+			else
+			{
+				work->error = tf_strdup(sqlite3_errmsg(db));
+			}
+		}
+		else
+		{
+			work->error = error ? tf_strdup(error) : tf_strdup(sqlite3_errmsg(db));
+		}
+		tf_ssb_release_db_writer(ssb, db);
+	}
+	else
+	{
+		work->error = tf_strdup("not administrator");
+	}
+}
+
+static void _tf_ssb_swap_with_server_identity_after_work(tf_ssb_t* ssb, int status, void* user_data)
+{
+	swap_with_server_identity_t* work = user_data;
+	JSContext* context = tf_ssb_get_context(ssb);
+	JSValue error = JS_UNDEFINED;
+	if (work->error)
+	{
+		JSValue arg = JS_ThrowInternalError(context, "%s", work->error);
+		JSValue exception = JS_GetException(context);
+		error = JS_Call(context, work->promise[1], JS_UNDEFINED, 1, &exception);
+		tf_free(work->error);
+		JS_FreeValue(context, exception);
+		JS_FreeValue(context, arg);
+	}
+	else
+	{
+		error = JS_Call(context, work->promise[0], JS_UNDEFINED, 0, NULL);
+	}
+	tf_util_report_error(context, error);
+	JS_FreeValue(context, error);
+	JS_FreeValue(context, work->promise[0]);
+	JS_FreeValue(context, work->promise[1]);
+	tf_free(work);
+}
+
+static JSValue _tf_ssb_swap_with_server_identity(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv)
+{
+	tf_ssb_t* ssb = JS_GetOpaque(this_val, _tf_ssb_classId);
+	JSValue result = JS_UNDEFINED;
+	if (ssb)
+	{
+		size_t user_length = 0;
+		const char* user = JS_ToCStringLen(context, &user_length, argv[0]);
+		const char* id = JS_ToCString(context, argv[1]);
+		swap_with_server_identity_t* work = tf_malloc(sizeof(swap_with_server_identity_t) + user_length + 1);
+		*work = (swap_with_server_identity_t) { 0 };
+		tf_ssb_whoami(ssb, work->server_id, sizeof(work->server_id));
+		snprintf(work->id, sizeof(work->id), "%s", id);
+		memcpy(work->user, user, user_length + 1);
+		result = JS_NewPromiseCapability(context, work->promise);
+		tf_ssb_run_work(ssb, _tf_ssb_swap_with_server_identity_work, _tf_ssb_swap_with_server_identity_after_work, work);
+		JS_FreeCString(context, user);
+		JS_FreeCString(context, id);
+	}
+	return result;
+}
+
 typedef struct _identities_visit_t
 {
 	JSContext* context;
@@ -2312,6 +2415,7 @@ void tf_ssb_register(JSContext* context, tf_ssb_t* ssb)
 	JS_SetPropertyStr(context, object, "addIdentity", JS_NewCFunction(context, _tf_ssb_addIdentity, "addIdentity", 2));
 	JS_SetPropertyStr(context, object, "deleteIdentity", JS_NewCFunction(context, _tf_ssb_deleteIdentity, "deleteIdentity", 2));
 	JS_SetPropertyStr(context, object, "setServerFollowingMe", JS_NewCFunction(context, _tf_ssb_set_server_following_me, "setServerFollowingMe", 3));
+	JS_SetPropertyStr(context, object, "swapWithServerIdentity", JS_NewCFunction(context, _tf_ssb_swap_with_server_identity, "swapWithServerIdentity", 2));
 	JS_SetPropertyStr(context, object, "getIdentities", JS_NewCFunction(context, _tf_ssb_getIdentities, "getIdentities", 1));
 	JS_SetPropertyStr(context, object, "getPrivateKey", JS_NewCFunction(context, _tf_ssb_getPrivateKey, "getPrivateKey", 2));
 	JS_SetPropertyStr(context, object, "privateMessageEncrypt", JS_NewCFunction(context, _tf_ssb_private_message_encrypt, "privateMessageEncrypt", 4));

src/ssb.rpc.c

@@ -1295,17 +1295,15 @@ static void _tf_ssb_rpc_connections_changed_callback(tf_ssb_t* ssb, tf_ssb_chang
 	}
 }
 
-static void _tf_ssb_rpc_broadcasts_changed_visit(const char* host, const struct sockaddr_in* addr, tf_ssb_broadcast_origin_t origin, tf_ssb_connection_t* tunnel, const uint8_t* pub, void* user_data)
+static void _tf_ssb_rpc_broadcasts_changed_visit(
+	const char* host, const struct sockaddr_in* addr, tf_ssb_broadcast_origin_t origin, tf_ssb_connection_t* tunnel, const uint8_t* pub, void* user_data)
 {
 	tf_ssb_t* ssb = user_data;
-	if (tunnel &&
-		(tf_ssb_connection_get_flags(tunnel) & k_tf_ssb_connect_flag_one_shot) != 0 &&
-		!tf_ssb_connection_get_tunnel(tunnel))
+	if (tunnel && (tf_ssb_connection_get_flags(tunnel) & k_tf_ssb_connect_flag_one_shot) != 0 && !tf_ssb_connection_get_tunnel(tunnel))
 	{
 		char target_id[k_id_base64_len] = { 0 };
 		char portal_id[k_id_base64_len] = { 0 };
-		if (tf_ssb_id_bin_to_str(target_id, sizeof(target_id), pub) &&
-			tf_ssb_connection_get_id(tunnel, portal_id, sizeof(portal_id)))
+		if (tf_ssb_id_bin_to_str(target_id, sizeof(target_id), pub) && tf_ssb_connection_get_id(tunnel, portal_id, sizeof(portal_id)))
 		{
 			tf_ssb_tunnel_create(ssb, portal_id, target_id, k_tf_ssb_connect_flag_one_shot);
 		}