fix: signin の資格情報が足りないだけの場合はエラーにせず200を返すように (#14700)

* fix: signin の資格情報が足りないだけの場合はエラーにせず200を返すように

* run api extractor

* fix

* fix

* fix test

* /signin -> /signin-flow

* fix

* fix lint

* rename

* fix

* fix

3 files changed, 25 insertions, 49 deletions

diff --git a/packages/backend/src/server/api/ApiServerService.ts b/packages/backend/src/server/api/ApiServerService.ts
index 356e145681..6b760c258b 100644
--- a/packages/backend/src/server/api/ApiServerService.ts
+++ b/packages/backend/src/server/api/ApiServerService.ts
@@ -133,7 +133,7 @@ export class ApiServerService {
 				'turnstile-response'?: string;
 				'm-captcha-response'?: string;
 			};
-		}>('/signin', (request, reply) => this.signinApiService.signin(request, reply));
+		}>('/signin-flow', (request, reply) => this.signinApiService.signin(request, reply));
 
 		fastify.post<{
 			Body: {
diff --git a/packages/backend/src/server/api/SigninApiService.ts b/packages/backend/src/server/api/SigninApiService.ts
index 81684beb3c..0d24ffa56a 100644
--- a/packages/backend/src/server/api/SigninApiService.ts
+++ b/packages/backend/src/server/api/SigninApiService.ts
@@ -5,8 +5,8 @@
 
 import { Inject, Injectable } from '@nestjs/common';
 import bcrypt from 'bcryptjs';
-import * as OTPAuth from 'otpauth';
 import { IsNull } from 'typeorm';
+import * as Misskey from 'misskey-js';
 import { DI } from '@/di-symbols.js';
 import type {
 	MiMeta,
@@ -26,27 +26,9 @@ import { CaptchaService } from '@/core/CaptchaService.js';
 import { FastifyReplyError } from '@/misc/fastify-reply-error.js';
 import { RateLimiterService } from './RateLimiterService.js';
 import { SigninService } from './SigninService.js';
-import type { AuthenticationResponseJSON, PublicKeyCredentialRequestOptionsJSON } from '@simplewebauthn/types';
+import type { AuthenticationResponseJSON } from '@simplewebauthn/types';
 import type { FastifyReply, FastifyRequest } from 'fastify';
 
-/**
- * next を指定すると、次にクライアント側で行うべき処理を指定できる。
- *
- * - `captcha`: パスワードと、（有効になっている場合は）CAPTCHAを求める
- * - `password`: パスワードを求める
- * - `totp`: ワンタイムパスワードを求める
- * - `passkey`: WebAuthn認証を求める（WebAuthnに対応していないブラウザの場合はワンタイムパスワード）
- */
-
-type SigninErrorResponse = {
-	id: string;
-	next?: 'captcha' | 'password' | 'totp';
-} | {
-	id: string;
-	next: 'passkey';
-	authRequest: PublicKeyCredentialRequestOptionsJSON;
-};
-
 @Injectable()
 export class SigninApiService {
 	constructor(
@@ -101,7 +83,7 @@ export class SigninApiService {
 		const password = body['password'];
 		const token = body['token'];
 
-		function error(status: number, error: SigninErrorResponse) {
+		function error(status: number, error: { id: string }) {
 			reply.code(status);
 			return { error };
 		}
@@ -152,21 +134,17 @@ export class SigninApiService {
 		const securityKeysAvailable = await this.userSecurityKeysRepository.countBy({ userId: user.id }).then(result => result >= 1);
 
 		if (password == null) {
-			reply.code(403);
+			reply.code(200);
 			if (profile.twoFactorEnabled) {
 				return {
-					error: {
-						id: '144ff4f8-bd6c-41bc-82c3-b672eb09efbf',
-						next: 'password',
-					},
-				} satisfies { error: SigninErrorResponse };
+					finished: false,
+					next: 'password',
+				} satisfies Misskey.entities.SigninFlowResponse;
 			} else {
 				return {
-					error: {
-						id: '144ff4f8-bd6c-41bc-82c3-b672eb09efbf',
-						next: 'captcha',
-					},
-				} satisfies { error: SigninErrorResponse };
+					finished: false,
+					next: 'captcha',
+				} satisfies Misskey.entities.SigninFlowResponse;
 			}
 		}
 
@@ -178,7 +156,7 @@ export class SigninApiService {
 		// Compare password
 		const same = await bcrypt.compare(password, profile.password!);
 
-		const fail = async (status?: number, failure?: SigninErrorResponse) => {
+		const fail = async (status?: number, failure?: { id: string; }) => {
 			// Append signin history
 			await this.signinsRepository.insert({
 				id: this.idService.gen(),
@@ -268,27 +246,23 @@ export class SigninApiService {
 
 			const authRequest = await this.webAuthnService.initiateAuthentication(user.id);
 
-			reply.code(403);
+			reply.code(200);
 			return {
-				error: {
-					id: '06e661b9-8146-4ae3-bde5-47138c0ae0c4',
-					next: 'passkey',
-					authRequest,
-				},
-			} satisfies { error: SigninErrorResponse };
+				finished: false,
+				next: 'passkey',
+				authRequest,
+			} satisfies Misskey.entities.SigninFlowResponse;
 		} else {
 			if (!same || !profile.twoFactorEnabled) {
 				return await fail(403, {
 					id: '932c904e-9460-45b7-9ce6-7ed33be7eb2c',
 				});
 			} else {
-				reply.code(403);
+				reply.code(200);
 				return {
-					error: {
-						id: '144ff4f8-bd6c-41bc-82c3-b672eb09efbf',
-						next: 'totp',
-					},
-				} satisfies { error: SigninErrorResponse };
+					finished: false,
+					next: 'totp',
+				} satisfies Misskey.entities.SigninFlowResponse;
 			}
 		}
 		// never get here
diff --git a/packages/backend/src/server/api/SigninService.ts b/packages/backend/src/server/api/SigninService.ts
index 4b041f373f..640356b50c 100644
--- a/packages/backend/src/server/api/SigninService.ts
+++ b/packages/backend/src/server/api/SigninService.ts
@@ -4,6 +4,7 @@
  */
 
 import { Inject, Injectable } from '@nestjs/common';
+import * as Misskey from 'misskey-js';
 import { DI } from '@/di-symbols.js';
 import type { SigninsRepository, UserProfilesRepository } from '@/models/_.js';
 import { IdService } from '@/core/IdService.js';
@@ -57,9 +58,10 @@ export class SigninService {
 
 		reply.code(200);
 		return {
+			finished: true,
 			id: user.id,
-			i: user.token,
-		};
+			i: user.token!,
+		} satisfies Misskey.entities.SigninFlowResponse;
 	}
 }