enhance: 二要素認証設定時のセキュリティを強化 (#11863)

* enhance: 二要素認証設定時のセキュリティを強化

パスワード入力が必要な操作を行う際、二要素認証が有効であれば確認コードの入力も必要にする

* Update CoreModule.ts

* Update 2fa.ts

* wip

* wip

* Update 2fa.ts

* tweak

2 files changed, 51 insertions, 0 deletions

diff --git a/packages/backend/src/core/CoreModule.ts b/packages/backend/src/core/CoreModule.ts
index 18271ee346..78333e70a5 100644
--- a/packages/backend/src/core/CoreModule.ts
+++ b/packages/backend/src/core/CoreModule.ts
@@ -51,6 +51,7 @@ import { UserKeypairService } from './UserKeypairService.js';
 import { UserListService } from './UserListService.js';
 import { UserMutingService } from './UserMutingService.js';
 import { UserSuspendService } from './UserSuspendService.js';
+import { UserAuthService } from './UserAuthService.js';
 import { VideoProcessingService } from './VideoProcessingService.js';
 import { WebhookService } from './WebhookService.js';
 import { ProxyAccountService } from './ProxyAccountService.js';
@@ -177,6 +178,7 @@ const $UserKeypairService: Provider = { provide: 'UserKeypairService', useExisti
 const $UserListService: Provider = { provide: 'UserListService', useExisting: UserListService };
 const $UserMutingService: Provider = { provide: 'UserMutingService', useExisting: UserMutingService };
 const $UserSuspendService: Provider = { provide: 'UserSuspendService', useExisting: UserSuspendService };
+const $UserAuthService: Provider = { provide: 'UserAuthService', useExisting: UserAuthService };
 const $VideoProcessingService: Provider = { provide: 'VideoProcessingService', useExisting: VideoProcessingService };
 const $WebhookService: Provider = { provide: 'WebhookService', useExisting: WebhookService };
 const $UtilityService: Provider = { provide: 'UtilityService', useExisting: UtilityService };
@@ -306,6 +308,7 @@ const $ApQuestionService: Provider = { provide: 'ApQuestionService', useExisting
 		UserListService,
 		UserMutingService,
 		UserSuspendService,
+		UserAuthService,
 		VideoProcessingService,
 		WebhookService,
 		UtilityService,
@@ -428,6 +431,7 @@ const $ApQuestionService: Provider = { provide: 'ApQuestionService', useExisting
 		$UserListService,
 		$UserMutingService,
 		$UserSuspendService,
+		$UserAuthService,
 		$VideoProcessingService,
 		$WebhookService,
 		$UtilityService,
@@ -551,6 +555,7 @@ const $ApQuestionService: Provider = { provide: 'ApQuestionService', useExisting
 		UserListService,
 		UserMutingService,
 		UserSuspendService,
+		UserAuthService,
 		VideoProcessingService,
 		WebhookService,
 		UtilityService,
@@ -672,6 +677,7 @@ const $ApQuestionService: Provider = { provide: 'ApQuestionService', useExisting
 		$UserListService,
 		$UserMutingService,
 		$UserSuspendService,
+		$UserAuthService,
 		$VideoProcessingService,
 		$WebhookService,
 		$UtilityService,
diff --git a/packages/backend/src/core/UserAuthService.ts b/packages/backend/src/core/UserAuthService.ts
new file mode 100644
index 0000000000..ccf4dfc6bd
--- /dev/null
+++ b/packages/backend/src/core/UserAuthService.ts
@@ -0,0 +1,45 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { Inject, Injectable } from '@nestjs/common';
+import { QueryFailedError } from 'typeorm';
+import * as OTPAuth from 'otpauth';
+import { DI } from '@/di-symbols.js';
+import type { MiUserProfile, UserProfilesRepository, UsersRepository } from '@/models/_.js';
+import { bindThis } from '@/decorators.js';
+import { isDuplicateKeyValueError } from '@/misc/is-duplicate-key-value-error.js';
+import type { MiLocalUser } from '@/models/User.js';
+
+@Injectable()
+export class UserAuthService {
+	constructor(
+		@Inject(DI.usersRepository)
+		private usersRepository: UsersRepository,
+
+		@Inject(DI.userProfilesRepository)
+		private userProfilesRepository: UserProfilesRepository,
+	) {
+	}
+
+	@bindThis
+	public async twoFactorAuthenticate(profile: MiUserProfile, token: string): Promise<void> {
+		if (profile.twoFactorBackupSecret?.includes(token)) {
+			await this.userProfilesRepository.update({ userId: profile.userId }, {
+				twoFactorBackupSecret: profile.twoFactorBackupSecret.filter((secret) => secret !== token),
+			});
+		} else {
+			const delta = OTPAuth.TOTP.validate({
+				secret: OTPAuth.Secret.fromBase32(profile.twoFactorSecret!),
+				digits: 6,
+				token,
+				window: 5,
+			});
+
+			if (delta === null) {
+				throw new Error('authentication failed');
+			}
+		}
+	}
+}