From e7f20affc94a76537aa5ef11b1340af41a6ce614 Mon Sep 17 00:00:00 2001
From: nullobsi <me@nullob.si>
Date: Tue, 20 Jul 2021 11:51:59 -0700
Subject: [PATCH] In private mode, block access to many public APIs

---
 packages/backend/src/server/api/call.ts       | 13 ++++++++++++
 packages/backend/src/server/api/endpoints.ts  |  6 ++++++
 .../src/server/api/endpoints/announcements.ts |  1 +
 .../server/api/endpoints/channels/featured.ts |  1 +
 .../src/server/api/endpoints/channels/show.ts |  1 +
 .../server/api/endpoints/channels/timeline.ts |  1 +
 .../api/endpoints/charts/active-users.ts      |  1 +
 .../server/api/endpoints/charts/ap-request.ts |  1 +
 .../src/server/api/endpoints/charts/drive.ts  |  1 +
 .../server/api/endpoints/charts/federation.ts |  1 +
 .../server/api/endpoints/charts/hashtag.ts    |  1 +
 .../server/api/endpoints/charts/instance.ts   |  1 +
 .../src/server/api/endpoints/charts/notes.ts  |  1 +
 .../server/api/endpoints/charts/user/drive.ts |  1 +
 .../api/endpoints/charts/user/following.ts    |  1 +
 .../server/api/endpoints/charts/user/notes.ts |  1 +
 .../api/endpoints/charts/user/reactions.ts    |  1 +
 .../src/server/api/endpoints/charts/users.ts  |  1 +
 .../src/server/api/endpoints/clips/notes.ts   |  1 +
 .../src/server/api/endpoints/clips/show.ts    |  1 +
 .../api/endpoints/federation/followers.ts     |  1 +
 .../api/endpoints/federation/following.ts     |  1 +
 .../api/endpoints/federation/instances.ts     |  1 +
 .../api/endpoints/federation/show-instance.ts |  1 +
 .../server/api/endpoints/federation/users.ts  |  1 +
 .../server/api/endpoints/gallery/featured.ts  |  1 +
 .../server/api/endpoints/gallery/popular.ts   |  1 +
 .../src/server/api/endpoints/gallery/posts.ts |  1 +
 .../api/endpoints/gallery/posts/show.ts       |  1 +
 .../api/endpoints/get-online-users-count.ts   |  1 +
 .../src/server/api/endpoints/hashtags/list.ts |  1 +
 .../server/api/endpoints/hashtags/search.ts   |  1 +
 .../src/server/api/endpoints/hashtags/show.ts |  1 +
 .../server/api/endpoints/hashtags/trend.ts    |  1 +
 .../server/api/endpoints/hashtags/users.ts    |  1 +
 .../backend/src/server/api/endpoints/meta.ts  | 20 ++++++++++++-------
 .../backend/src/server/api/endpoints/notes.ts |  1 +
 .../server/api/endpoints/notes/children.ts    |  3 ++-
 .../src/server/api/endpoints/notes/clips.ts   |  1 +
 .../api/endpoints/notes/conversation.ts       |  1 +
 .../server/api/endpoints/notes/featured.ts    |  1 +
 .../api/endpoints/notes/global-timeline.ts    |  1 +
 .../api/endpoints/notes/local-timeline.ts     |  1 +
 .../server/api/endpoints/notes/reactions.ts   |  1 +
 .../src/server/api/endpoints/notes/renotes.ts |  1 +
 .../src/server/api/endpoints/notes/replies.ts |  1 +
 .../api/endpoints/notes/search-by-tag.ts      |  1 +
 .../src/server/api/endpoints/notes/search.ts  |  1 +
 .../src/server/api/endpoints/notes/show.ts    |  1 +
 .../server/api/endpoints/notes/translate.ts   |  1 +
 .../server/api/endpoints/pages/featured.ts    |  1 +
 .../src/server/api/endpoints/pages/show.ts    |  1 +
 .../src/server/api/endpoints/pinned-users.ts  |  1 +
 .../src/server/api/endpoints/server-info.ts   |  1 +
 .../backend/src/server/api/endpoints/stats.ts |  1 +
 .../backend/src/server/api/endpoints/users.ts |  1 +
 .../src/server/api/endpoints/users/clips.ts   |  1 +
 .../server/api/endpoints/users/followers.ts   |  1 +
 .../server/api/endpoints/users/following.ts   |  1 +
 .../api/endpoints/users/gallery/posts.ts      |  1 +
 .../users/get-frequently-replied-users.ts     |  1 +
 .../src/server/api/endpoints/users/notes.ts   |  1 +
 .../src/server/api/endpoints/users/pages.ts   |  1 +
 .../server/api/endpoints/users/reactions.ts   |  1 +
 .../users/search-by-username-and-host.ts      |  1 +
 .../src/server/api/endpoints/users/search.ts  |  1 +
 .../src/server/api/endpoints/users/show.ts    |  1 +
 .../src/server/api/endpoints/users/stats.ts   |  1 +
 68 files changed, 98 insertions(+), 8 deletions(-)

diff --git a/packages/backend/src/server/api/call.ts b/packages/backend/src/server/api/call.ts
index aa130459a..9458d15fe 100644
--- a/packages/backend/src/server/api/call.ts
+++ b/packages/backend/src/server/api/call.ts
@@ -7,6 +7,8 @@ import { limiter } from './limiter.js';
 import endpoints, { IEndpointMeta } from './endpoints.js';
 import { ApiError } from './error.js';
 import { apiLogger } from './logger.js';
+import { AccessToken } from '@/models/entities/access-token.js';
+import { fetchMeta } from '@/misc/fetch-meta.js';
 
 const accessDenied = {
 	message: 'Access denied.',
@@ -93,6 +95,17 @@ export default async (endpoint: string, user: CacheableLocalUser | null | undefi
 		});
 	}
 
+	// private mode
+	const meta = await fetchMeta();
+	if (meta.privateMode && ep.meta.requireCredentialPrivateMode && user == null) {
+		throw new ApiError({
+			message: 'Credential required.',
+			code: 'CREDENTIAL_REQUIRED',
+			id: '1384574d-a912-4b81-8601-c7b1c4085df1',
+			httpStatusCode: 401
+		});
+	}
+
 	// Cast non JSON input
 	if ((ep.meta.requireFile || ctx?.method === 'GET') && ep.params.properties) {
 		for (const k of Object.keys(ep.params.properties)) {
diff --git a/packages/backend/src/server/api/endpoints.ts b/packages/backend/src/server/api/endpoints.ts
index 4644f34d9..d7fcc32d3 100644
--- a/packages/backend/src/server/api/endpoints.ts
+++ b/packages/backend/src/server/api/endpoints.ts
@@ -706,6 +706,12 @@ export interface IEndpointMeta {
 	 */
 	readonly secure?: boolean;
 
+	/**
+	 * プライベートモードでなら、このエンドポイントにリクエストするときにユーザー情報が必要か否か
+	 * 省略した場合は false として解釈されます
+	 */
+	readonly requireCredentialPrivateMode?: boolean;
+
 	/**
 	 * エンドポイントの種類
 	 * パーミッションの実現に利用されます。
diff --git a/packages/backend/src/server/api/endpoints/announcements.ts b/packages/backend/src/server/api/endpoints/announcements.ts
index 23cb93c9a..189de042b 100644
--- a/packages/backend/src/server/api/endpoints/announcements.ts
+++ b/packages/backend/src/server/api/endpoints/announcements.ts
@@ -6,6 +6,7 @@ export const meta = {
 	tags: ['meta'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'array',
diff --git a/packages/backend/src/server/api/endpoints/channels/featured.ts b/packages/backend/src/server/api/endpoints/channels/featured.ts
index 73980c0fa..13ad6ca7d 100644
--- a/packages/backend/src/server/api/endpoints/channels/featured.ts
+++ b/packages/backend/src/server/api/endpoints/channels/featured.ts
@@ -5,6 +5,7 @@ export const meta = {
 	tags: ['channels'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'array',
diff --git a/packages/backend/src/server/api/endpoints/channels/show.ts b/packages/backend/src/server/api/endpoints/channels/show.ts
index 87665a986..1c8461af4 100644
--- a/packages/backend/src/server/api/endpoints/channels/show.ts
+++ b/packages/backend/src/server/api/endpoints/channels/show.ts
@@ -6,6 +6,7 @@ export const meta = {
 	tags: ['channels'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'object',
diff --git a/packages/backend/src/server/api/endpoints/channels/timeline.ts b/packages/backend/src/server/api/endpoints/channels/timeline.ts
index deaa29901..18ba6b2e3 100644
--- a/packages/backend/src/server/api/endpoints/channels/timeline.ts
+++ b/packages/backend/src/server/api/endpoints/channels/timeline.ts
@@ -8,6 +8,7 @@ export const meta = {
 	tags: ['notes', 'channels'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'array',
diff --git a/packages/backend/src/server/api/endpoints/charts/active-users.ts b/packages/backend/src/server/api/endpoints/charts/active-users.ts
index ea2379429..216676020 100644
--- a/packages/backend/src/server/api/endpoints/charts/active-users.ts
+++ b/packages/backend/src/server/api/endpoints/charts/active-users.ts
@@ -4,6 +4,7 @@ import define from '../../define.js';
 
 export const meta = {
 	tags: ['charts', 'users'],
+	requireCredentialPrivateMode: true,
 
 	res: getJsonSchema(activeUsersChart.schema),
 
diff --git a/packages/backend/src/server/api/endpoints/charts/ap-request.ts b/packages/backend/src/server/api/endpoints/charts/ap-request.ts
index 06dee250e..a8f6e4564 100644
--- a/packages/backend/src/server/api/endpoints/charts/ap-request.ts
+++ b/packages/backend/src/server/api/endpoints/charts/ap-request.ts
@@ -4,6 +4,7 @@ import define from '../../define.js';
 
 export const meta = {
 	tags: ['charts'],
+	requireCredentialPrivateMode: true,
 
 	res: getJsonSchema(apRequestChart.schema),
 
diff --git a/packages/backend/src/server/api/endpoints/charts/drive.ts b/packages/backend/src/server/api/endpoints/charts/drive.ts
index dd2c2d683..14f82e39d 100644
--- a/packages/backend/src/server/api/endpoints/charts/drive.ts
+++ b/packages/backend/src/server/api/endpoints/charts/drive.ts
@@ -4,6 +4,7 @@ import define from '../../define.js';
 
 export const meta = {
 	tags: ['charts', 'drive'],
+	requireCredentialPrivateMode: true,
 
 	res: getJsonSchema(driveChart.schema),
 
diff --git a/packages/backend/src/server/api/endpoints/charts/federation.ts b/packages/backend/src/server/api/endpoints/charts/federation.ts
index 8c35b3c46..141e005ee 100644
--- a/packages/backend/src/server/api/endpoints/charts/federation.ts
+++ b/packages/backend/src/server/api/endpoints/charts/federation.ts
@@ -4,6 +4,7 @@ import define from '../../define.js';
 
 export const meta = {
 	tags: ['charts'],
+	requireCredentialPrivateMode: true,
 
 	res: getJsonSchema(federationChart.schema),
 
diff --git a/packages/backend/src/server/api/endpoints/charts/hashtag.ts b/packages/backend/src/server/api/endpoints/charts/hashtag.ts
index 77e24a62c..d34153bc1 100644
--- a/packages/backend/src/server/api/endpoints/charts/hashtag.ts
+++ b/packages/backend/src/server/api/endpoints/charts/hashtag.ts
@@ -4,6 +4,7 @@ import define from '../../define.js';
 
 export const meta = {
 	tags: ['charts', 'hashtags'],
+	requireCredentialPrivateMode: true,
 
 	res: getJsonSchema(hashtagChart.schema),
 
diff --git a/packages/backend/src/server/api/endpoints/charts/instance.ts b/packages/backend/src/server/api/endpoints/charts/instance.ts
index 817d51ad0..3d9619d24 100644
--- a/packages/backend/src/server/api/endpoints/charts/instance.ts
+++ b/packages/backend/src/server/api/endpoints/charts/instance.ts
@@ -4,6 +4,7 @@ import define from '../../define.js';
 
 export const meta = {
 	tags: ['charts'],
+	requireCredentialPrivateMode: true,
 
 	res: getJsonSchema(instanceChart.schema),
 
diff --git a/packages/backend/src/server/api/endpoints/charts/notes.ts b/packages/backend/src/server/api/endpoints/charts/notes.ts
index 951adf540..42befed27 100644
--- a/packages/backend/src/server/api/endpoints/charts/notes.ts
+++ b/packages/backend/src/server/api/endpoints/charts/notes.ts
@@ -4,6 +4,7 @@ import define from '../../define.js';
 
 export const meta = {
 	tags: ['charts', 'notes'],
+	requireCredentialPrivateMode: true,
 
 	res: getJsonSchema(notesChart.schema),
 
diff --git a/packages/backend/src/server/api/endpoints/charts/user/drive.ts b/packages/backend/src/server/api/endpoints/charts/user/drive.ts
index f165b4022..cb73b4ac9 100644
--- a/packages/backend/src/server/api/endpoints/charts/user/drive.ts
+++ b/packages/backend/src/server/api/endpoints/charts/user/drive.ts
@@ -4,6 +4,7 @@ import define from '../../../define.js';
 
 export const meta = {
 	tags: ['charts', 'drive', 'users'],
+	requireCredentialPrivateMode: true,
 
 	res: getJsonSchema(perUserDriveChart.schema),
 
diff --git a/packages/backend/src/server/api/endpoints/charts/user/following.ts b/packages/backend/src/server/api/endpoints/charts/user/following.ts
index f5d42e21c..697a5f37a 100644
--- a/packages/backend/src/server/api/endpoints/charts/user/following.ts
+++ b/packages/backend/src/server/api/endpoints/charts/user/following.ts
@@ -4,6 +4,7 @@ import { perUserFollowingChart } from '@/services/chart/index.js';
 
 export const meta = {
 	tags: ['charts', 'users', 'following'],
+	requireCredentialPrivateMode: true,
 
 	res: getJsonSchema(perUserFollowingChart.schema),
 
diff --git a/packages/backend/src/server/api/endpoints/charts/user/notes.ts b/packages/backend/src/server/api/endpoints/charts/user/notes.ts
index aefe550d4..5b576754d 100644
--- a/packages/backend/src/server/api/endpoints/charts/user/notes.ts
+++ b/packages/backend/src/server/api/endpoints/charts/user/notes.ts
@@ -4,6 +4,7 @@ import define from '../../../define.js';
 
 export const meta = {
 	tags: ['charts', 'users', 'notes'],
+	requireCredentialPrivateMode: true,
 
 	res: getJsonSchema(perUserNotesChart.schema),
 
diff --git a/packages/backend/src/server/api/endpoints/charts/user/reactions.ts b/packages/backend/src/server/api/endpoints/charts/user/reactions.ts
index 6bc6b56bf..61c4527b9 100644
--- a/packages/backend/src/server/api/endpoints/charts/user/reactions.ts
+++ b/packages/backend/src/server/api/endpoints/charts/user/reactions.ts
@@ -4,6 +4,7 @@ import define from '../../../define.js';
 
 export const meta = {
 	tags: ['charts', 'users', 'reactions'],
+	requireCredentialPrivateMode: true,
 
 	res: getJsonSchema(perUserReactionsChart.schema),
 
diff --git a/packages/backend/src/server/api/endpoints/charts/users.ts b/packages/backend/src/server/api/endpoints/charts/users.ts
index 338e8fd33..0c799287c 100644
--- a/packages/backend/src/server/api/endpoints/charts/users.ts
+++ b/packages/backend/src/server/api/endpoints/charts/users.ts
@@ -4,6 +4,7 @@ import define from '../../define.js';
 
 export const meta = {
 	tags: ['charts', 'users'],
+	requireCredentialPrivateMode: true,
 
 	res: getJsonSchema(usersChart.schema),
 
diff --git a/packages/backend/src/server/api/endpoints/clips/notes.ts b/packages/backend/src/server/api/endpoints/clips/notes.ts
index 4ace747ef..eea6f0a0d 100644
--- a/packages/backend/src/server/api/endpoints/clips/notes.ts
+++ b/packages/backend/src/server/api/endpoints/clips/notes.ts
@@ -10,6 +10,7 @@ export const meta = {
 	tags: ['account', 'notes', 'clips'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	kind: 'read:account',
 
diff --git a/packages/backend/src/server/api/endpoints/clips/show.ts b/packages/backend/src/server/api/endpoints/clips/show.ts
index c3d73c168..aec4c1253 100644
--- a/packages/backend/src/server/api/endpoints/clips/show.ts
+++ b/packages/backend/src/server/api/endpoints/clips/show.ts
@@ -6,6 +6,7 @@ export const meta = {
 	tags: ['clips', 'account'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	kind: 'read:account',
 
diff --git a/packages/backend/src/server/api/endpoints/federation/followers.ts b/packages/backend/src/server/api/endpoints/federation/followers.ts
index 7b1197d1e..8a04df2d5 100644
--- a/packages/backend/src/server/api/endpoints/federation/followers.ts
+++ b/packages/backend/src/server/api/endpoints/federation/followers.ts
@@ -6,6 +6,7 @@ export const meta = {
 	tags: ['federation'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'array',
diff --git a/packages/backend/src/server/api/endpoints/federation/following.ts b/packages/backend/src/server/api/endpoints/federation/following.ts
index ed1f142d8..fe41eefa4 100644
--- a/packages/backend/src/server/api/endpoints/federation/following.ts
+++ b/packages/backend/src/server/api/endpoints/federation/following.ts
@@ -6,6 +6,7 @@ export const meta = {
 	tags: ['federation'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'array',
diff --git a/packages/backend/src/server/api/endpoints/federation/instances.ts b/packages/backend/src/server/api/endpoints/federation/instances.ts
index 07e5c07c6..41750f13e 100644
--- a/packages/backend/src/server/api/endpoints/federation/instances.ts
+++ b/packages/backend/src/server/api/endpoints/federation/instances.ts
@@ -7,6 +7,7 @@ export const meta = {
 	tags: ['federation'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'array',
diff --git a/packages/backend/src/server/api/endpoints/federation/show-instance.ts b/packages/backend/src/server/api/endpoints/federation/show-instance.ts
index 2fbb8a15c..92298f672 100644
--- a/packages/backend/src/server/api/endpoints/federation/show-instance.ts
+++ b/packages/backend/src/server/api/endpoints/federation/show-instance.ts
@@ -6,6 +6,7 @@ export const meta = {
 	tags: ['federation'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	res: {
 		oneOf: [{
diff --git a/packages/backend/src/server/api/endpoints/federation/users.ts b/packages/backend/src/server/api/endpoints/federation/users.ts
index 65ad9f88d..a9b3f3a8c 100644
--- a/packages/backend/src/server/api/endpoints/federation/users.ts
+++ b/packages/backend/src/server/api/endpoints/federation/users.ts
@@ -6,6 +6,7 @@ export const meta = {
 	tags: ['federation'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'array',
diff --git a/packages/backend/src/server/api/endpoints/gallery/featured.ts b/packages/backend/src/server/api/endpoints/gallery/featured.ts
index e6acd3691..52232c5cc 100644
--- a/packages/backend/src/server/api/endpoints/gallery/featured.ts
+++ b/packages/backend/src/server/api/endpoints/gallery/featured.ts
@@ -5,6 +5,7 @@ export const meta = {
 	tags: ['gallery'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'array',
diff --git a/packages/backend/src/server/api/endpoints/gallery/popular.ts b/packages/backend/src/server/api/endpoints/gallery/popular.ts
index c4c8982fc..5286dcd8b 100644
--- a/packages/backend/src/server/api/endpoints/gallery/popular.ts
+++ b/packages/backend/src/server/api/endpoints/gallery/popular.ts
@@ -5,6 +5,7 @@ export const meta = {
 	tags: ['gallery'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'array',
diff --git a/packages/backend/src/server/api/endpoints/gallery/posts.ts b/packages/backend/src/server/api/endpoints/gallery/posts.ts
index 428ba9cc7..f556ec513 100644
--- a/packages/backend/src/server/api/endpoints/gallery/posts.ts
+++ b/packages/backend/src/server/api/endpoints/gallery/posts.ts
@@ -4,6 +4,7 @@ import { GalleryPosts } from '@/models/index.js';
 
 export const meta = {
 	tags: ['gallery'],
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'array',
diff --git a/packages/backend/src/server/api/endpoints/gallery/posts/show.ts b/packages/backend/src/server/api/endpoints/gallery/posts/show.ts
index 4f6dafd7c..48468f410 100644
--- a/packages/backend/src/server/api/endpoints/gallery/posts/show.ts
+++ b/packages/backend/src/server/api/endpoints/gallery/posts/show.ts
@@ -6,6 +6,7 @@ export const meta = {
 	tags: ['gallery'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	errors: {
 		noSuchPost: {
diff --git a/packages/backend/src/server/api/endpoints/get-online-users-count.ts b/packages/backend/src/server/api/endpoints/get-online-users-count.ts
index 56c550297..a8febe05b 100644
--- a/packages/backend/src/server/api/endpoints/get-online-users-count.ts
+++ b/packages/backend/src/server/api/endpoints/get-online-users-count.ts
@@ -7,6 +7,7 @@ export const meta = {
 	tags: ['meta'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 } as const;
 
 export const paramDef = {
diff --git a/packages/backend/src/server/api/endpoints/hashtags/list.ts b/packages/backend/src/server/api/endpoints/hashtags/list.ts
index 50e36386c..4b18cb76a 100644
--- a/packages/backend/src/server/api/endpoints/hashtags/list.ts
+++ b/packages/backend/src/server/api/endpoints/hashtags/list.ts
@@ -5,6 +5,7 @@ export const meta = {
 	tags: ['hashtags'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'array',
diff --git a/packages/backend/src/server/api/endpoints/hashtags/search.ts b/packages/backend/src/server/api/endpoints/hashtags/search.ts
index c28984477..ed1abf1a1 100644
--- a/packages/backend/src/server/api/endpoints/hashtags/search.ts
+++ b/packages/backend/src/server/api/endpoints/hashtags/search.ts
@@ -5,6 +5,7 @@ export const meta = {
 	tags: ['hashtags'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'array',
diff --git a/packages/backend/src/server/api/endpoints/hashtags/show.ts b/packages/backend/src/server/api/endpoints/hashtags/show.ts
index 5b78f6ac7..409233c24 100644
--- a/packages/backend/src/server/api/endpoints/hashtags/show.ts
+++ b/packages/backend/src/server/api/endpoints/hashtags/show.ts
@@ -7,6 +7,7 @@ export const meta = {
 	tags: ['hashtags'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'object',
diff --git a/packages/backend/src/server/api/endpoints/hashtags/trend.ts b/packages/backend/src/server/api/endpoints/hashtags/trend.ts
index 9cdbc8941..8795927e6 100644
--- a/packages/backend/src/server/api/endpoints/hashtags/trend.ts
+++ b/packages/backend/src/server/api/endpoints/hashtags/trend.ts
@@ -24,6 +24,7 @@ export const meta = {
 	tags: ['hashtags'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'array',
diff --git a/packages/backend/src/server/api/endpoints/hashtags/users.ts b/packages/backend/src/server/api/endpoints/hashtags/users.ts
index a5df21a7e..1d18a9ce7 100644
--- a/packages/backend/src/server/api/endpoints/hashtags/users.ts
+++ b/packages/backend/src/server/api/endpoints/hashtags/users.ts
@@ -4,6 +4,7 @@ import { normalizeForSearch } from '@/misc/normalize-for-search.js';
 
 export const meta = {
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	tags: ['hashtags', 'users'],
 
diff --git a/packages/backend/src/server/api/endpoints/meta.ts b/packages/backend/src/server/api/endpoints/meta.ts
index ca6b471d5..d93d399e4 100644
--- a/packages/backend/src/server/api/endpoints/meta.ts
+++ b/packages/backend/src/server/api/endpoints/meta.ts
@@ -336,7 +336,7 @@ export default define(meta, paramDef, async (ps, me) => {
 			expiresAt: MoreThan(new Date()),
 		},
 	});
-	// TODO: add secure mode, etc
+
 	const response: any = {
 		maintainerName: instance.maintainerName,
 		maintainerEmail: instance.maintainerEmail,
@@ -350,6 +350,10 @@ export default define(meta, paramDef, async (ps, me) => {
 		tosUrl: instance.ToSUrl,
 		repositoryUrl: instance.repositoryUrl,
 		feedbackUrl: instance.feedbackUrl,
+
+		secureMode: instance.secureMode,
+		privateMode: instance.privateMode,
+
 		disableRegistration: instance.disableRegistration,
 		disableLocalTimeline: instance.disableLocalTimeline,
 		disableGlobalTimeline: instance.disableGlobalTimeline,
@@ -369,10 +373,10 @@ export default define(meta, paramDef, async (ps, me) => {
 		backgroundImageUrl: instance.backgroundImageUrl,
 		logoImageUrl: instance.logoImageUrl,
 		maxNoteTextLength: MAX_NOTE_TEXT_LENGTH, // 後方互換性のため
-		emojis: await Emojis.packMany(emojis),
+		emojis: instance.privateMode && !me ? [] : await Emojis.packMany(emojis),
 		defaultLightTheme: instance.defaultLightTheme,
 		defaultDarkTheme: instance.defaultDarkTheme,
-		ads: ads.map(ad => ({
+		ads: instance.privateMode && !me ? [] : ads.map(ad => ({
 			id: ad.id,
 			url: ad.url,
 			place: ad.place,
@@ -390,8 +394,8 @@ export default define(meta, paramDef, async (ps, me) => {
 		translatorAvailable: instance.deeplAuthKey != null,
 
 		...(ps.detail ? {
-			pinnedPages: instance.pinnedPages,
-			pinnedClipId: instance.pinnedClipId,
+			pinnedPages: instance.privateMode && !me ? [] : instance.pinnedPages,
+			pinnedClipId: instance.privateMode && !me ? [] : instance.pinnedClipId,
 			cacheRemoteFiles: instance.cacheRemoteFiles,
 			requireSetup: (await Users.countBy({
 				host: IsNull(),
@@ -400,9 +404,11 @@ export default define(meta, paramDef, async (ps, me) => {
 	};
 
 	if (ps.detail) {
-		const proxyAccount = instance.proxyAccountId ? await Users.pack(instance.proxyAccountId).catch(() => null) : null;
+		if (!instance.privateMode || me) {
+			const proxyAccount = instance.proxyAccountId ? await Users.pack(instance.proxyAccountId).catch(() => null) : null;
+			response.proxyAccountName = proxyAccount ? proxyAccount.username : null;
+		}
 
-		response.proxyAccountName = proxyAccount ? proxyAccount.username : null;
 		response.features = {
 			registration: !instance.disableRegistration,
 			localTimeLine: !instance.disableLocalTimeline,
diff --git a/packages/backend/src/server/api/endpoints/notes.ts b/packages/backend/src/server/api/endpoints/notes.ts
index 015b0338e..fc2bc3741 100644
--- a/packages/backend/src/server/api/endpoints/notes.ts
+++ b/packages/backend/src/server/api/endpoints/notes.ts
@@ -5,6 +5,7 @@ import { makePaginationQuery } from '../common/make-pagination-query.js';
 export const meta = {
 	tags: ['notes'],
 
+	requireCredentialPrivateMode: true,
 	res: {
 		type: 'array',
 		optional: false, nullable: false,
diff --git a/packages/backend/src/server/api/endpoints/notes/children.ts b/packages/backend/src/server/api/endpoints/notes/children.ts
index efc109105..d27bbaefa 100644
--- a/packages/backend/src/server/api/endpoints/notes/children.ts
+++ b/packages/backend/src/server/api/endpoints/notes/children.ts
@@ -10,6 +10,7 @@ export const meta = {
 	tags: ['notes'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'array',
@@ -20,7 +21,7 @@ export const meta = {
 			ref: 'Note',
 		},
 	},
-} as const;
+};
 
 export const paramDef = {
 	type: 'object',
diff --git a/packages/backend/src/server/api/endpoints/notes/clips.ts b/packages/backend/src/server/api/endpoints/notes/clips.ts
index e79f8563e..5a4420a68 100644
--- a/packages/backend/src/server/api/endpoints/notes/clips.ts
+++ b/packages/backend/src/server/api/endpoints/notes/clips.ts
@@ -8,6 +8,7 @@ export const meta = {
 	tags: ['clips', 'notes'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'array',
diff --git a/packages/backend/src/server/api/endpoints/notes/conversation.ts b/packages/backend/src/server/api/endpoints/notes/conversation.ts
index b731d1824..28613962a 100644
--- a/packages/backend/src/server/api/endpoints/notes/conversation.ts
+++ b/packages/backend/src/server/api/endpoints/notes/conversation.ts
@@ -8,6 +8,7 @@ export const meta = {
 	tags: ['notes'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'array',
diff --git a/packages/backend/src/server/api/endpoints/notes/featured.ts b/packages/backend/src/server/api/endpoints/notes/featured.ts
index dd9cc581a..0e4a454d7 100644
--- a/packages/backend/src/server/api/endpoints/notes/featured.ts
+++ b/packages/backend/src/server/api/endpoints/notes/featured.ts
@@ -7,6 +7,7 @@ export const meta = {
 	tags: ['notes'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'array',
diff --git a/packages/backend/src/server/api/endpoints/notes/global-timeline.ts b/packages/backend/src/server/api/endpoints/notes/global-timeline.ts
index 925318f54..6a468f198 100644
--- a/packages/backend/src/server/api/endpoints/notes/global-timeline.ts
+++ b/packages/backend/src/server/api/endpoints/notes/global-timeline.ts
@@ -12,6 +12,7 @@ import { generateBlockedUserQuery } from '../../common/generate-block-query.js';
 export const meta = {
 	tags: ['notes'],
 
+	requireCredentialPrivateMode: true,
 	res: {
 		type: 'array',
 		optional: false, nullable: false,
diff --git a/packages/backend/src/server/api/endpoints/notes/local-timeline.ts b/packages/backend/src/server/api/endpoints/notes/local-timeline.ts
index aac2a3749..3a5c458a0 100644
--- a/packages/backend/src/server/api/endpoints/notes/local-timeline.ts
+++ b/packages/backend/src/server/api/endpoints/notes/local-timeline.ts
@@ -14,6 +14,7 @@ import { generateBlockedUserQuery } from '../../common/generate-block-query.js';
 
 export const meta = {
 	tags: ['notes'],
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'array',
diff --git a/packages/backend/src/server/api/endpoints/notes/reactions.ts b/packages/backend/src/server/api/endpoints/notes/reactions.ts
index 15a62d394..be2846d25 100644
--- a/packages/backend/src/server/api/endpoints/notes/reactions.ts
+++ b/packages/backend/src/server/api/endpoints/notes/reactions.ts
@@ -8,6 +8,7 @@ export const meta = {
 	tags: ['notes', 'reactions'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	allowGet: true,
 	cacheSec: 60,
diff --git a/packages/backend/src/server/api/endpoints/notes/renotes.ts b/packages/backend/src/server/api/endpoints/notes/renotes.ts
index 28be36076..4d0cd8fc6 100644
--- a/packages/backend/src/server/api/endpoints/notes/renotes.ts
+++ b/packages/backend/src/server/api/endpoints/notes/renotes.ts
@@ -11,6 +11,7 @@ export const meta = {
 	tags: ['notes'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'array',
diff --git a/packages/backend/src/server/api/endpoints/notes/replies.ts b/packages/backend/src/server/api/endpoints/notes/replies.ts
index ab0018f58..b05ef5914 100644
--- a/packages/backend/src/server/api/endpoints/notes/replies.ts
+++ b/packages/backend/src/server/api/endpoints/notes/replies.ts
@@ -9,6 +9,7 @@ export const meta = {
 	tags: ['notes'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'array',
diff --git a/packages/backend/src/server/api/endpoints/notes/search-by-tag.ts b/packages/backend/src/server/api/endpoints/notes/search-by-tag.ts
index 777de7221..231913223 100644
--- a/packages/backend/src/server/api/endpoints/notes/search-by-tag.ts
+++ b/packages/backend/src/server/api/endpoints/notes/search-by-tag.ts
@@ -10,6 +10,7 @@ import { generateBlockedUserQuery } from '../../common/generate-block-query.js';
 
 export const meta = {
 	tags: ['notes', 'hashtags'],
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'array',
diff --git a/packages/backend/src/server/api/endpoints/notes/search.ts b/packages/backend/src/server/api/endpoints/notes/search.ts
index 4e2cdae80..cf3de47a3 100644
--- a/packages/backend/src/server/api/endpoints/notes/search.ts
+++ b/packages/backend/src/server/api/endpoints/notes/search.ts
@@ -12,6 +12,7 @@ export const meta = {
 	tags: ['notes'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'array',
diff --git a/packages/backend/src/server/api/endpoints/notes/show.ts b/packages/backend/src/server/api/endpoints/notes/show.ts
index 5cd74bd2c..470791b1b 100644
--- a/packages/backend/src/server/api/endpoints/notes/show.ts
+++ b/packages/backend/src/server/api/endpoints/notes/show.ts
@@ -7,6 +7,7 @@ export const meta = {
 	tags: ['notes'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'object',
diff --git a/packages/backend/src/server/api/endpoints/notes/translate.ts b/packages/backend/src/server/api/endpoints/notes/translate.ts
index 5e40e7106..ba6e262d6 100644
--- a/packages/backend/src/server/api/endpoints/notes/translate.ts
+++ b/packages/backend/src/server/api/endpoints/notes/translate.ts
@@ -12,6 +12,7 @@ export const meta = {
 	tags: ['notes'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'object',
diff --git a/packages/backend/src/server/api/endpoints/pages/featured.ts b/packages/backend/src/server/api/endpoints/pages/featured.ts
index 5a149a626..75580778b 100644
--- a/packages/backend/src/server/api/endpoints/pages/featured.ts
+++ b/packages/backend/src/server/api/endpoints/pages/featured.ts
@@ -5,6 +5,7 @@ export const meta = {
 	tags: ['pages'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'array',
diff --git a/packages/backend/src/server/api/endpoints/pages/show.ts b/packages/backend/src/server/api/endpoints/pages/show.ts
index 5d37e86b9..54ae43deb 100644
--- a/packages/backend/src/server/api/endpoints/pages/show.ts
+++ b/packages/backend/src/server/api/endpoints/pages/show.ts
@@ -8,6 +8,7 @@ export const meta = {
 	tags: ['pages'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'object',
diff --git a/packages/backend/src/server/api/endpoints/pinned-users.ts b/packages/backend/src/server/api/endpoints/pinned-users.ts
index 41595b47d..d2ded60a1 100644
--- a/packages/backend/src/server/api/endpoints/pinned-users.ts
+++ b/packages/backend/src/server/api/endpoints/pinned-users.ts
@@ -9,6 +9,7 @@ export const meta = {
 	tags: ['users'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'array',
diff --git a/packages/backend/src/server/api/endpoints/server-info.ts b/packages/backend/src/server/api/endpoints/server-info.ts
index 99f3730e9..fdfbc8a6f 100644
--- a/packages/backend/src/server/api/endpoints/server-info.ts
+++ b/packages/backend/src/server/api/endpoints/server-info.ts
@@ -4,6 +4,7 @@ import define from '../define.js';
 
 export const meta = {
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	tags: ['meta'],
 } as const;
diff --git a/packages/backend/src/server/api/endpoints/stats.ts b/packages/backend/src/server/api/endpoints/stats.ts
index cc94f8bf2..0f2fb1f41 100644
--- a/packages/backend/src/server/api/endpoints/stats.ts
+++ b/packages/backend/src/server/api/endpoints/stats.ts
@@ -5,6 +5,7 @@ import { IsNull } from 'typeorm';
 
 export const meta = {
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	tags: ['meta'],
 
diff --git a/packages/backend/src/server/api/endpoints/users.ts b/packages/backend/src/server/api/endpoints/users.ts
index 3a8211374..d2f2ddcbf 100644
--- a/packages/backend/src/server/api/endpoints/users.ts
+++ b/packages/backend/src/server/api/endpoints/users.ts
@@ -7,6 +7,7 @@ export const meta = {
 	tags: ['users'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	res: {
 		type: 'array',
diff --git a/packages/backend/src/server/api/endpoints/users/clips.ts b/packages/backend/src/server/api/endpoints/users/clips.ts
index 09fdf27c2..becfad52d 100644
--- a/packages/backend/src/server/api/endpoints/users/clips.ts
+++ b/packages/backend/src/server/api/endpoints/users/clips.ts
@@ -4,6 +4,7 @@ import { makePaginationQuery } from '../../common/make-pagination-query.js';
 
 export const meta = {
 	tags: ['users', 'clips'],
+	requireCredentialPrivateMode: true,
 
 	description: 'Show all clips this user owns.',
 
diff --git a/packages/backend/src/server/api/endpoints/users/followers.ts b/packages/backend/src/server/api/endpoints/users/followers.ts
index 7f9f98076..4971d21b0 100644
--- a/packages/backend/src/server/api/endpoints/users/followers.ts
+++ b/packages/backend/src/server/api/endpoints/users/followers.ts
@@ -9,6 +9,7 @@ export const meta = {
 	tags: ['users'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	description: 'Show everyone that follows this user.',
 
diff --git a/packages/backend/src/server/api/endpoints/users/following.ts b/packages/backend/src/server/api/endpoints/users/following.ts
index 0aaa810f7..043841aa4 100644
--- a/packages/backend/src/server/api/endpoints/users/following.ts
+++ b/packages/backend/src/server/api/endpoints/users/following.ts
@@ -9,6 +9,7 @@ export const meta = {
 	tags: ['users'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	description: 'Show everyone that this user is following.',
 
diff --git a/packages/backend/src/server/api/endpoints/users/gallery/posts.ts b/packages/backend/src/server/api/endpoints/users/gallery/posts.ts
index 35bf2df59..95ca77825 100644
--- a/packages/backend/src/server/api/endpoints/users/gallery/posts.ts
+++ b/packages/backend/src/server/api/endpoints/users/gallery/posts.ts
@@ -4,6 +4,7 @@ import { makePaginationQuery } from '../../../common/make-pagination-query.js';
 
 export const meta = {
 	tags: ['users', 'gallery'],
+	requireCredentialPrivateMode: true,
 
 	description: 'Show all gallery posts by the given user.',
 
diff --git a/packages/backend/src/server/api/endpoints/users/get-frequently-replied-users.ts b/packages/backend/src/server/api/endpoints/users/get-frequently-replied-users.ts
index 56965d306..8cf3ea040 100644
--- a/packages/backend/src/server/api/endpoints/users/get-frequently-replied-users.ts
+++ b/packages/backend/src/server/api/endpoints/users/get-frequently-replied-users.ts
@@ -9,6 +9,7 @@ export const meta = {
 	tags: ['users'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	description: 'Get a list of other users that the specified user frequently replies to.',
 
diff --git a/packages/backend/src/server/api/endpoints/users/notes.ts b/packages/backend/src/server/api/endpoints/users/notes.ts
index 9fa56fe83..1e205eec3 100644
--- a/packages/backend/src/server/api/endpoints/users/notes.ts
+++ b/packages/backend/src/server/api/endpoints/users/notes.ts
@@ -11,6 +11,7 @@ import { generateBlockedUserQuery } from '../../common/generate-block-query.js';
 export const meta = {
 	tags: ['users', 'notes'],
 
+	requireCredentialPrivateMode: true,
 	description: 'Show all notes that this user created.',
 
 	res: {
diff --git a/packages/backend/src/server/api/endpoints/users/pages.ts b/packages/backend/src/server/api/endpoints/users/pages.ts
index b1d28af84..e1d876e6b 100644
--- a/packages/backend/src/server/api/endpoints/users/pages.ts
+++ b/packages/backend/src/server/api/endpoints/users/pages.ts
@@ -4,6 +4,7 @@ import { makePaginationQuery } from '../../common/make-pagination-query.js';
 
 export const meta = {
 	tags: ['users', 'pages'],
+	requireCredentialPrivateMode: true,
 
 	description: 'Show all pages this user created.',
 
diff --git a/packages/backend/src/server/api/endpoints/users/reactions.ts b/packages/backend/src/server/api/endpoints/users/reactions.ts
index 9668bd21b..79cf58a41 100644
--- a/packages/backend/src/server/api/endpoints/users/reactions.ts
+++ b/packages/backend/src/server/api/endpoints/users/reactions.ts
@@ -8,6 +8,7 @@ export const meta = {
 	tags: ['users', 'reactions'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	description: 'Show all reactions this user made.',
 
diff --git a/packages/backend/src/server/api/endpoints/users/search-by-username-and-host.ts b/packages/backend/src/server/api/endpoints/users/search-by-username-and-host.ts
index 6e5bc46bb..fa1cb8761 100644
--- a/packages/backend/src/server/api/endpoints/users/search-by-username-and-host.ts
+++ b/packages/backend/src/server/api/endpoints/users/search-by-username-and-host.ts
@@ -8,6 +8,7 @@ export const meta = {
 	tags: ['users'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	description: 'Search for a user by username and/or host.',
 
diff --git a/packages/backend/src/server/api/endpoints/users/search.ts b/packages/backend/src/server/api/endpoints/users/search.ts
index 01729de66..70aaa4526 100644
--- a/packages/backend/src/server/api/endpoints/users/search.ts
+++ b/packages/backend/src/server/api/endpoints/users/search.ts
@@ -7,6 +7,7 @@ export const meta = {
 	tags: ['users'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	description: 'Search for users.',
 
diff --git a/packages/backend/src/server/api/endpoints/users/show.ts b/packages/backend/src/server/api/endpoints/users/show.ts
index 846d83b49..892e37bdf 100644
--- a/packages/backend/src/server/api/endpoints/users/show.ts
+++ b/packages/backend/src/server/api/endpoints/users/show.ts
@@ -10,6 +10,7 @@ export const meta = {
 	tags: ['users'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	description: 'Show the properties of a user.',
 
diff --git a/packages/backend/src/server/api/endpoints/users/stats.ts b/packages/backend/src/server/api/endpoints/users/stats.ts
index 47f322ee9..a68b6ea40 100644
--- a/packages/backend/src/server/api/endpoints/users/stats.ts
+++ b/packages/backend/src/server/api/endpoints/users/stats.ts
@@ -7,6 +7,7 @@ export const meta = {
 	tags: ['users'],
 
 	requireCredential: false,
+	requireCredentialPrivateMode: true,
 
 	description: 'Show statistics about a user.',