enhance(frontend): サインイン画面の改善 (#14658)

* wip * Update MkSignin.vue * Update MkSignin.vue * wip * Update CHANGELOG.md * enhance(frontend): サインイン画面の改善 * Update Changelog * 14655の変更取り込み * spdx * fix * fix * fix * 🎨 * 🎨 * 🎨 * 🎨 * Captchaがリセットされない問題を修正 * 次の処理をsignin apiから読み取るように * Add Comments * fix * fix test * attempt to fix test * fix test * fix test * fix test * fix * fix test * fix: 一部のエラーがちゃんと出るように * Update Changelog * 🎨 * 🎨 * remove border --------- Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com>
2024-10-04 15:23:33 +09:00 · 2024-10-04 15:23:33 +09:00 · 975c2e7bc5
parent e344650278
commit 975c2e7bc5
19 changed files with 1161 additions and 489 deletions
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@ -4,6 +4,8 @@
 - サーバー初期設定時に使用する初期パスワードを設定できるようになりました。今後Misskeyサーバーを新たに設置する際には、初回の起動前にコンフィグファイルの`setupPassword`をコメントアウトし、初期パスワードを設定することをおすすめします。（すでに初期設定を完了しているサーバーについては、この変更に伴い対応する必要はありません）  
  - ホスティングサービスを運営している場合は、コンフィグファイルを構築する際に`setupPassword`をランダムな値に設定し、ユーザーに通知するようにシステムを更新することをおすすめします。
  - なお、初期パスワードが設定されていない場合でも初期設定を行うことが可能です（UI上で初期パスワードの入力欄を空欄にすると続行できます）。
+- ユーザーデータを読み込む際の型が一部変更されました。
+	- `twoFactorEnabled`, `usePasswordLessLogin`, `securityKeys`: 自分とモデレーター以外のユーザーからは取得できなくなりました

 ### General
 - Feat: サーバー初期設定時に初期パスワードを設定できるように
@ -14,9 +16,11 @@

 ### Client
 - Enhance: デザインの調整
+- Enhance: ログイン画面の認証フローを改善

 ### Server
 - Enhance: セキュリティ向上のため、ログイン時にメール通知を行うように
+- Enhance: 自分とモデレーター以外のユーザーから二要素認証関連のデータが取得できないように


 ## 2024.9.0
--- a/cypress/e2e/basic.cy.ts
+++ b/cypress/e2e/basic.cy.ts
@ -123,8 +123,13 @@ describe('After user signup', () => {
 		cy.intercept('POST', '/api/signin').as('signin');

 		cy.get('[data-cy-signin]').click();
-		cy.get('[data-cy-signin-username] input').type('alice');
-		// Enterキーでサインインできるかの確認も兼ねる
+
+		cy.get('[data-cy-signin-page-input]').should('be.visible', { timeout: 1000 });
+		// Enterキーで続行できるかの確認も兼ねる
+		cy.get('[data-cy-signin-username] input').type('alice{enter}');
+
+		cy.get('[data-cy-signin-page-password]').should('be.visible', { timeout: 10000 });
+		// Enterキーで続行できるかの確認も兼ねる
 		cy.get('[data-cy-signin-password] input').type('alice1234{enter}');

 		cy.wait('@signin');
@ -139,8 +144,9 @@ describe('After user signup', () => {
 		cy.visitHome();

 		cy.get('[data-cy-signin]').click();
-		cy.get('[data-cy-signin-username] input').type('alice');
-		cy.get('[data-cy-signin-password] input').type('alice1234{enter}');
+
+		cy.get('[data-cy-signin-page-input]').should('be.visible', { timeout: 1000 });
+		cy.get('[data-cy-signin-username] input').type('alice{enter}');

 		// TODO: cypressにブラウザの言語指定できる機能が実装され次第英語のみテストするようにする
 		cy.contains(/アカウントが凍結されています|This account has been suspended due to/gi);
--- a/cypress/support/commands.ts
+++ b/cypress/support/commands.ts
@ -58,7 +58,9 @@ Cypress.Commands.add('login', (username, password) => {
 	cy.intercept('POST', '/api/signin').as('signin');

 	cy.get('[data-cy-signin]').click();
-	cy.get('[data-cy-signin-username] input').type(username);
+	cy.get('[data-cy-signin-page-input]').should('be.visible', { timeout: 1000 });
+	cy.get('[data-cy-signin-username] input').type(`${username}{enter}`);
+	cy.get('[data-cy-signin-page-password]').should('be.visible', { timeout: 10000 });
 	cy.get('[data-cy-signin-password] input').type(`${password}{enter}`);

 	cy.wait('@signin').as('signedIn');
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@ -3714,6 +3714,10 @@ export interface Locale extends ILocale {
     * パスワードが間違っています。
     */
    "incorrectPassword": string;
+    /**
+     * ワンタイムパスワードが間違っているか、期限切れになっています。
+     */
+    "incorrectTotp": string;
    /**
     * 「{choice}」に投票しますか？
     */
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@ -924,6 +924,7 @@ followersVisibility: "フォロワーの公開範囲"
 continueThread: "さらにスレッドを見る"
 deleteAccountConfirm: "アカウントが削除されます。よろしいですか？"
 incorrectPassword: "パスワードが間違っています。"
+incorrectTotp: "ワンタイムパスワードが間違っているか、期限切れになっています。"
 voteConfirm: "「{choice}」に投票しますか？"
 hide: "隠す"
 useDrawerReactionPickerForMobile: "モバイルデバイスのときドロワーで表示"
--- a/packages/backend/src/core/entities/UserEntityService.ts
+++ b/packages/backend/src/core/entities/UserEntityService.ts
@ -545,11 +545,6 @@ export class UserEntityService implements OnModuleInit {
 				publicReactions: this.isLocalUser(user) ? profile!.publicReactions : false, // https://github.com/misskey-dev/misskey/issues/12964
 				followersVisibility: profile!.followersVisibility,
 				followingVisibility: profile!.followingVisibility,
-				twoFactorEnabled: profile!.twoFactorEnabled,
-				usePasswordLessLogin: profile!.usePasswordLessLogin,
-				securityKeys: profile!.twoFactorEnabled
-					? this.userSecurityKeysRepository.countBy({ userId: user.id }).then(result => result >= 1)
-					: false,
 				roles: this.roleService.getUserRoles(user.id).then(roles => roles.filter(role => role.isPublic).sort((a, b) => b.displayOrder - a.displayOrder).map(role => ({
 					id: role.id,
 					name: role.name,
@ -564,6 +559,14 @@ export class UserEntityService implements OnModuleInit {
 				moderationNote: iAmModerator ? (profile!.moderationNote ?? '') : undefined,
 			} : {}),

+			...(isDetailed && (isMe || iAmModerator) ? {
+				twoFactorEnabled: profile!.twoFactorEnabled,
+				usePasswordLessLogin: profile!.usePasswordLessLogin,
+				securityKeys: profile!.twoFactorEnabled
+					? this.userSecurityKeysRepository.countBy({ userId: user.id }).then(result => result >= 1)
+					: false,
+			} : {}),
+
 			...(isDetailed && isMe ? {
 				avatarId: user.avatarId,
 				bannerId: user.bannerId,
--- a/packages/backend/src/models/json-schema/user.ts
+++ b/packages/backend/src/models/json-schema/user.ts
@ -346,21 +346,6 @@ export const packedUserDetailedNotMeOnlySchema = {
 			nullable: false, optional: false,
 			enum: ['public', 'followers', 'private'],
 		},
-		twoFactorEnabled: {
-			type: 'boolean',
-			nullable: false, optional: false,
-			default: false,
-		},
-		usePasswordLessLogin: {
-			type: 'boolean',
-			nullable: false, optional: false,
-			default: false,
-		},
-		securityKeys: {
-			type: 'boolean',
-			nullable: false, optional: false,
-			default: false,
-		},
 		roles: {
 			type: 'array',
 			nullable: false, optional: false,
@ -382,6 +367,18 @@ export const packedUserDetailedNotMeOnlySchema = {
 			type: 'string',
 			nullable: false, optional: true,
 		},
+		twoFactorEnabled: {
+			type: 'boolean',
+			nullable: false, optional: true,
+		},
+		usePasswordLessLogin: {
+			type: 'boolean',
+			nullable: false, optional: true,
+		},
+		securityKeys: {
+			type: 'boolean',
+			nullable: false, optional: true,
+		},
 		//#region relations
 		isFollowing: {
 			type: 'boolean',
@ -630,6 +627,21 @@ export const packedMeDetailedOnlySchema = {
 			nullable: false, optional: false,
 			ref: 'RolePolicies',
 		},
+		twoFactorEnabled: {
+			type: 'boolean',
+			nullable: false, optional: false,
+			default: false,
+		},
+		usePasswordLessLogin: {
+			type: 'boolean',
+			nullable: false, optional: false,
+			default: false,
+		},
+		securityKeys: {
+			type: 'boolean',
+			nullable: false, optional: false,
+			default: false,
+		},
 		//#region secrets
 		email: {
 			type: 'string',
--- a/packages/backend/src/server/api/SigninApiService.ts
+++ b/packages/backend/src/server/api/SigninApiService.ts
@ -12,6 +12,7 @@ import type {
 	MiMeta,
 	SigninsRepository,
 	UserProfilesRepository,
+	UserSecurityKeysRepository,
 	UsersRepository,
 } from '@/models/_.js';
 import type { Config } from '@/config.js';
@ -25,9 +26,27 @@ 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 } from '@simplewebauthn/types';
+import type { AuthenticationResponseJSON, PublicKeyCredentialRequestOptionsJSON } 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(
@ -43,6 +62,9 @@ export class SigninApiService {
 		@Inject(DI.userProfilesRepository)
 		private userProfilesRepository: UserProfilesRepository,

+		@Inject(DI.userSecurityKeysRepository)
+		private userSecurityKeysRepository: UserSecurityKeysRepository,
+
 		@Inject(DI.signinsRepository)
 		private signinsRepository: SigninsRepository,

@ -60,7 +82,7 @@ export class SigninApiService {
 		request: FastifyRequest<{
 			Body: {
 				username: string;
-				password: string;
+				password?: string;
 				token?: string;
 				credential?: AuthenticationResponseJSON;
 				'hcaptcha-response'?: string;
@ -79,7 +101,7 @@ export class SigninApiService {
 		const password = body['password'];
 		const token = body['token'];

-		function error(status: number, error: { id: string }) {
+		function error(status: number, error: SigninErrorResponse) {
 			reply.code(status);
 			return { error };
 		}
@ -103,11 +125,6 @@ export class SigninApiService {
 			return;
 		}

-		if (typeof password !== 'string') {
-			reply.code(400);
-			return;
-		}
-
 		if (token != null && typeof token !== 'string') {
 			reply.code(400);
 			return;
@ -132,11 +149,36 @@ export class SigninApiService {
 		}

 		const profile = await this.userProfilesRepository.findOneByOrFail({ userId: user.id });
+		const securityKeysAvailable = await this.userSecurityKeysRepository.countBy({ userId: user.id }).then(result => result >= 1);
+
+		if (password == null) {
+			reply.code(403);
+			if (profile.twoFactorEnabled) {
+				return {
+					error: {
+						id: '144ff4f8-bd6c-41bc-82c3-b672eb09efbf',
+						next: 'password',
+					},
+				} satisfies { error: SigninErrorResponse };
+			} else {
+				return {
+					error: {
+						id: '144ff4f8-bd6c-41bc-82c3-b672eb09efbf',
+						next: 'captcha',
+					},
+				} satisfies { error: SigninErrorResponse };
+			}
+		}
+
+		if (typeof password !== 'string') {
+			reply.code(400);
+			return;
+		}

 		// Compare password
 		const same = await bcrypt.compare(password, profile.password!);

-		const fail = async (status?: number, failure?: { id: string }) => {
+		const fail = async (status?: number, failure?: SigninErrorResponse) => {
 			// Append signin history
 			await this.signinsRepository.insert({
 				id: this.idService.gen(),
@ -217,7 +259,7 @@ export class SigninApiService {
 					id: '93b86c4b-72f9-40eb-9815-798928603d1e',
 				});
 			}
-		} else {
+		} else if (securityKeysAvailable) {
 			if (!same && !profile.usePasswordLessLogin) {
 				return await fail(403, {
 					id: '932c904e-9460-45b7-9ce6-7ed33be7eb2c',
@ -226,8 +268,28 @@ export class SigninApiService {

 			const authRequest = await this.webAuthnService.initiateAuthentication(user.id);

-			reply.code(200);
-			return authRequest;
+			reply.code(403);
+			return {
+				error: {
+					id: '06e661b9-8146-4ae3-bde5-47138c0ae0c4',
+					next: 'passkey',
+					authRequest,
+				},
+			} satisfies { error: SigninErrorResponse };
+		} else {
+			if (!same || !profile.twoFactorEnabled) {
+				return await fail(403, {
+					id: '932c904e-9460-45b7-9ce6-7ed33be7eb2c',
+				});
+			} else {
+				reply.code(403);
+				return {
+					error: {
+						id: '144ff4f8-bd6c-41bc-82c3-b672eb09efbf',
+						next: 'totp',
+					},
+				} satisfies { error: SigninErrorResponse };
+			}
 		}
 		// never get here
 	}
--- a/packages/backend/test/e2e/2fa.ts
+++ b/packages/backend/test/e2e/2fa.ts
@ -136,13 +136,7 @@ describe('2要素認証', () => {
 		keyName: string,
 		credentialId: Buffer,
 		requestOptions: PublicKeyCredentialRequestOptionsJSON,
-	}): {
-		username: string,
-		password: string,
-		credential: AuthenticationResponseJSON,
-		'g-recaptcha-response'?: string | null,
-		'hcaptcha-response'?: string | null,
-	} => {
+	}): misskey.entities.SigninRequest => {
 		// AuthenticatorAssertionResponse.authenticatorData
 		// https://developer.mozilla.org/en-US/docs/Web/API/AuthenticatorAssertionResponse/authenticatorData
 		const authenticatorData = Buffer.concat([
@ -202,11 +196,16 @@ describe('2要素認証', () => {
 		}, alice);
 		assert.strictEqual(doneResponse.status, 200);

-		const usersShowResponse = await api('users/show', {
-			username,
-		}, alice);
-		assert.strictEqual(usersShowResponse.status, 200);
-		assert.strictEqual((usersShowResponse.body as unknown as { twoFactorEnabled: boolean }).twoFactorEnabled, true);
+		const signinWithoutTokenResponse = await api('signin', {
+			...signinParam(),
+		});
+		assert.strictEqual(signinWithoutTokenResponse.status, 403);
+		assert.deepStrictEqual(signinWithoutTokenResponse.body, {
+			error: {
+				id: '144ff4f8-bd6c-41bc-82c3-b672eb09efbf',
+				next: 'totp',
+			},
+		});

 		const signinResponse = await api('signin', {
 			...signinParam(),
@ -253,26 +252,28 @@ describe('2要素認証', () => {
 		assert.strictEqual(keyDoneResponse.body.id, credentialId.toString('base64url'));
 		assert.strictEqual(keyDoneResponse.body.name, keyName);

-		const usersShowResponse = await api('users/show', {
-			username,
-		});
-		assert.strictEqual(usersShowResponse.status, 200);
-		assert.strictEqual((usersShowResponse.body as unknown as { securityKeys: boolean }).securityKeys, true);
-
 		const signinResponse = await api('signin', {
 			...signinParam(),
 		});
-		assert.strictEqual(signinResponse.status, 200);
-		assert.strictEqual(signinResponse.body.i, undefined);
-		assert.notEqual((signinResponse.body as unknown as { challenge: unknown | undefined }).challenge, undefined);
-		assert.notEqual((signinResponse.body as unknown as { allowCredentials: unknown | undefined }).allowCredentials, undefined);
-		assert.strictEqual((signinResponse.body as unknown as { allowCredentials: {id: string}[] }).allowCredentials[0].id, credentialId.toString('base64url'));
+		const signinResponseBody = signinResponse.body as unknown as {
+			error: {
+				id: string;
+				next: 'passkey';
+				authRequest: PublicKeyCredentialRequestOptionsJSON;
+			};
+		};
+		assert.strictEqual(signinResponse.status, 403);
+		assert.strictEqual(signinResponseBody.error.id, '06e661b9-8146-4ae3-bde5-47138c0ae0c4');
+		assert.strictEqual(signinResponseBody.error.next, 'passkey');
+		assert.notEqual(signinResponseBody.error.authRequest.challenge, undefined);
+		assert.notEqual(signinResponseBody.error.authRequest.allowCredentials, undefined);
+		assert.strictEqual(signinResponseBody.error.authRequest.allowCredentials && signinResponseBody.error.authRequest.allowCredentials[0]?.id, credentialId.toString('base64url'));

 		const signinResponse2 = await api('signin', signinWithSecurityKeyParam({
 			keyName,
 			credentialId,
-			requestOptions: signinResponse.body,
-		} as any));
+			requestOptions: signinResponseBody.error.authRequest,
+		}));
 		assert.strictEqual(signinResponse2.status, 200);
 		assert.notEqual(signinResponse2.body.i, undefined);

@ -315,24 +316,32 @@ describe('2要素認証', () => {
 		}, alice);
 		assert.strictEqual(passwordLessResponse.status, 204);

-		const usersShowResponse = await api('users/show', {
-			username,
-		});
-		assert.strictEqual(usersShowResponse.status, 200);
-		assert.strictEqual((usersShowResponse.body as unknown as { usePasswordLessLogin: boolean }).usePasswordLessLogin, true);
+		const iResponse = await api('i', {}, alice);
+		assert.strictEqual(iResponse.status, 200);
+		assert.strictEqual(iResponse.body.usePasswordLessLogin, true);

 		const signinResponse = await api('signin', {
 			...signinParam(),
 			password: '',
 		});
-		assert.strictEqual(signinResponse.status, 200);
-		assert.strictEqual(signinResponse.body.i, undefined);
+		const signinResponseBody = signinResponse.body as unknown as {
+			error: {
+				id: string;
+				next: 'passkey';
+				authRequest: PublicKeyCredentialRequestOptionsJSON;
+			};
+		};
+		assert.strictEqual(signinResponse.status, 403);
+		assert.strictEqual(signinResponseBody.error.id, '06e661b9-8146-4ae3-bde5-47138c0ae0c4');
+		assert.strictEqual(signinResponseBody.error.next, 'passkey');
+		assert.notEqual(signinResponseBody.error.authRequest.challenge, undefined);
+		assert.notEqual(signinResponseBody.error.authRequest.allowCredentials, undefined);

 		const signinResponse2 = await api('signin', {
 			...signinWithSecurityKeyParam({
 				keyName,
 				credentialId,
-				requestOptions: signinResponse.body,
+				requestOptions: signinResponseBody.error.authRequest,
 			} as any),
 			password: '',
 		});
@ -424,11 +433,11 @@ describe('2要素認証', () => {
 		assert.strictEqual(keyDoneResponse.status, 200);

 		// テストの実行順によっては複数残ってるので全部消す
-		const iResponse = await api('i', {
+		const beforeIResponse = await api('i', {
 		}, alice);
-		assert.strictEqual(iResponse.status, 200);
-		assert.ok(iResponse.body.securityKeysList);
-		for (const key of iResponse.body.securityKeysList) {
+		assert.strictEqual(beforeIResponse.status, 200);
+		assert.ok(beforeIResponse.body.securityKeysList);
+		for (const key of beforeIResponse.body.securityKeysList) {
 			const removeKeyResponse = await api('i/2fa/remove-key', {
 				token: otpToken(registerResponse.body.secret),
 				password,
@ -437,11 +446,9 @@ describe('2要素認証', () => {
 			assert.strictEqual(removeKeyResponse.status, 200);
 		}

-		const usersShowResponse = await api('users/show', {
-			username,
-		});
-		assert.strictEqual(usersShowResponse.status, 200);
-		assert.strictEqual((usersShowResponse.body as unknown as { securityKeys: boolean }).securityKeys, false);
+		const afterIResponse = await api('i', {}, alice);
+		assert.strictEqual(afterIResponse.status, 200);
+		assert.strictEqual(afterIResponse.body.securityKeys, false);

 		const signinResponse = await api('signin', {
 			...signinParam(),
@ -468,11 +475,9 @@ describe('2要素認証', () => {
 		}, alice);
 		assert.strictEqual(doneResponse.status, 200);

-		const usersShowResponse = await api('users/show', {
-			username,
-		});
-		assert.strictEqual(usersShowResponse.status, 200);
-		assert.strictEqual((usersShowResponse.body as unknown as { twoFactorEnabled: boolean }).twoFactorEnabled, true);
+		const iResponse = await api('i', {}, alice);
+		assert.strictEqual(iResponse.status, 200);
+		assert.strictEqual(iResponse.body.twoFactorEnabled, true);

 		const unregisterResponse = await api('i/2fa/unregister', {
 			token: otpToken(registerResponse.body.secret),
--- a/packages/backend/test/e2e/users.ts
+++ b/packages/backend/test/e2e/users.ts
@ -83,9 +83,6 @@ describe('ユーザー', () => {
 			publicReactions: user.publicReactions,
 			followingVisibility: user.followingVisibility,
 			followersVisibility: user.followersVisibility,
-			twoFactorEnabled: user.twoFactorEnabled,
-			usePasswordLessLogin: user.usePasswordLessLogin,
-			securityKeys: user.securityKeys,
 			roles: user.roles,
 			memo: user.memo,
 		});
@ -149,6 +146,9 @@ describe('ユーザー', () => {
 			achievements: user.achievements,
 			loggedInDays: user.loggedInDays,
 			policies: user.policies,
+			twoFactorEnabled: user.twoFactorEnabled,
+			usePasswordLessLogin: user.usePasswordLessLogin,
+			securityKeys: user.securityKeys,
 			...(security ? {
 				email: user.email,
 				emailVerified: user.emailVerified,
@ -343,9 +343,6 @@ describe('ユーザー', () => {
 		assert.strictEqual(response.publicReactions, true);
 		assert.strictEqual(response.followingVisibility, 'public');
 		assert.strictEqual(response.followersVisibility, 'public');
-		assert.strictEqual(response.twoFactorEnabled, false);
-		assert.strictEqual(response.usePasswordLessLogin, false);
-		assert.strictEqual(response.securityKeys, false);
 		assert.deepStrictEqual(response.roles, []);
 		assert.strictEqual(response.memo, null);

@ -385,6 +382,9 @@ describe('ユーザー', () => {
 		assert.deepStrictEqual(response.achievements, []);
 		assert.deepStrictEqual(response.loggedInDays, 0);
 		assert.deepStrictEqual(response.policies, DEFAULT_POLICIES);
+		assert.strictEqual(response.twoFactorEnabled, false);
+		assert.strictEqual(response.usePasswordLessLogin, false);
+		assert.strictEqual(response.securityKeys, false);
 		assert.notStrictEqual(response.email, undefined);
 		assert.strictEqual(response.emailVerified, false);
 		assert.deepStrictEqual(response.securityKeysList, []);
@ -618,6 +618,9 @@ describe('ユーザー', () => {
 		{ label: 'Moderatorになっている', user: () => userModerator, me: () => userModerator, selector: (user: misskey.entities.MeDetailed) => user.isModerator },
 		// @ts-expect-error UserDetailedNotMe doesn't include isModerator
 		{ label: '自分以外から見たときはModeratorか判定できない', user: () => userModerator, selector: (user: misskey.entities.UserDetailedNotMe) => user.isModerator, expected: () => undefined },
+		{ label: '自分から見た場合に二要素認証関連のプロパティがセットされている', user: () => alice, me: () => alice, selector: (user: misskey.entities.MeDetailed) => user.twoFactorEnabled, expected: () => false },
+		{ label: '自分以外から見た場合に二要素認証関連のプロパティがセットされていない', user: () => alice, me: () => bob, selector: (user: misskey.entities.UserDetailedNotMe) => user.twoFactorEnabled, expected: () => undefined },
+		{ label: 'モデレーターから見た場合に二要素認証関連のプロパティがセットされている', user: () => alice, me: () => userModerator, selector: (user: misskey.entities.UserDetailedNotMe) => user.twoFactorEnabled, expected: () => false },
 		{ label: 'サイレンスになっている', user: () => userSilenced, selector: (user: misskey.entities.UserDetailed) => user.isSilenced },
 		// FIXME: 落ちる
 		//{ label: 'サスペンドになっている', user: () => userSuspended, selector: (user: misskey.entities.UserDetailed) => user.isSuspended },
--- a/packages/frontend/src/components/MkSignin.input.vue
+++ b/packages/frontend/src/components/MkSignin.input.vue
@ -0,0 +1,206 @@
+<!--
+SPDX-FileCopyrightText: syuilo and misskey-project
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
+<template>
+<div :class="$style.wrapper" data-cy-signin-page-input>
+	<div :class="$style.root">
+		<div :class="$style.avatar">
+			<i class="ti ti-user"></i>
+		</div>
+
+		<!-- ログイン画面メッセージ -->
+		<MkInfo v-if="message">
+			{{ message }}
+		</MkInfo>
+
+		<!-- 外部サーバーへの転送 -->
+		<div v-if="openOnRemote" class="_gaps_m">
+			<div class="_gaps_s">
+				<MkButton type="button" rounded primary style="margin: 0 auto;" @click="openRemote(openOnRemote)">
+					{{ i18n.ts.continueOnRemote }} <i class="ti ti-external-link"></i>
+				</MkButton>
+				<button type="button" class="_button" :class="$style.instanceManualSelectButton" @click="specifyHostAndOpenRemote(openOnRemote)">
+					{{ i18n.ts.specifyServerHost }}
+				</button>
+			</div>
+			<div :class="$style.orHr">
+				<p :class="$style.orMsg">{{ i18n.ts.or }}</p>
+			</div>
+		</div>
+
+		<!-- username入力 -->
+		<form class="_gaps_s" @submit.prevent="emit('usernameSubmitted', username)">
+			<MkInput v-model="username" :placeholder="i18n.ts.username" type="text" pattern="^[a-zA-Z0-9_]+$" :spellcheck="false" autocomplete="username webauthn" autofocus required data-cy-signin-username>
+				<template #prefix>@</template>
+				<template #suffix>@{{ host }}</template>
+			</MkInput>
+			<MkButton type="submit" large primary rounded style="margin: 0 auto;" data-cy-signin-page-input-continue>{{ i18n.ts.continue }} <i class="ti ti-arrow-right"></i></MkButton>
+		</form>
+
+		<!-- パスワードレスログイン -->
+		<div :class="$style.orHr">
+			<p :class="$style.orMsg">{{ i18n.ts.or }}</p>
+		</div>
+		<div>
+			<MkButton type="submit" style="margin: auto auto;" large rounded primary gradate @click="emit('passkeyClick', $event)">
+				<i class="ti ti-device-usb" style="font-size: medium;"></i>{{ i18n.ts.signinWithPasskey }}
+			</MkButton>
+		</div>
+	</div>
+</div>
+</template>
+
+<script setup lang="ts">
+import { ref } from 'vue';
+import { toUnicode } from 'punycode/';
+
+import { query, extractDomain } from '@@/js/url.js';
+import { host as configHost } from '@@/js/config.js';
+import type { OpenOnRemoteOptions } from '@/scripts/please-login.js';
+import { i18n } from '@/i18n.js';
+import * as os from '@/os.js';
+
+import MkButton from '@/components/MkButton.vue';
+import MkInput from '@/components/MkInput.vue';
+import MkInfo from '@/components/MkInfo.vue';
+
+const props = withDefaults(defineProps<{
+	message?: string,
+	openOnRemote?: OpenOnRemoteOptions,
+}>(), {
+	message: '',
+	openOnRemote: undefined,
+});
+
+const emit = defineEmits<{
+	(ev: 'usernameSubmitted', v: string): void;
+	(ev: 'passkeyClick', v: MouseEvent): void;
+}>();
+
+const host = toUnicode(configHost);
+
+const username = ref('');
+
+//#region Open on remote
+function openRemote(options: OpenOnRemoteOptions, targetHost?: string): void {
+	switch (options.type) {
+		case 'web':
+		case 'lookup': {
+			let _path: string;
+
+			if (options.type === 'lookup') {
+				// TODO: v2024.7.0以降が浸透してきたら正式なURLに変更する▼
+				// _path = `/lookup?uri=${encodeURIComponent(_path)}`;
+				_path = `/authorize-follow?acct=${encodeURIComponent(options.url)}`;
+			} else {
+				_path = options.path;
+			}
+
+			if (targetHost) {
+				window.open(`https://${targetHost}${_path}`, '_blank', 'noopener');
+			} else {
+				window.open(`https://misskey-hub.net/mi-web/?path=${encodeURIComponent(_path)}`, '_blank', 'noopener');
+			}
+			break;
+		}
+		case 'share': {
+			const params = query(options.params);
+			if (targetHost) {
+				window.open(`https://${targetHost}/share?${params}`, '_blank', 'noopener');
+			} else {
+				window.open(`https://misskey-hub.net/share/?${params}`, '_blank', 'noopener');
+			}
+			break;
+		}
+	}
+}
+
+async function specifyHostAndOpenRemote(options: OpenOnRemoteOptions): Promise<void> {
+	const { canceled, result: hostTemp } = await os.inputText({
+		title: i18n.ts.inputHostName,
+		placeholder: 'misskey.example.com',
+	});
+
+	if (canceled) return;
+
+	let targetHost: string | null = hostTemp;
+
+	// ドメイン部分だけを取り出す
+	targetHost = extractDomain(targetHost ?? '');
+	if (targetHost == null) {
+		os.alert({
+			type: 'error',
+			title: i18n.ts.invalidValue,
+			text: i18n.ts.tryAgain,
+		});
+		return;
+	}
+	openRemote(options, targetHost);
+}
+//#endregion
+</script>
+
+<style lang="scss" module>
+.root {
+	display: flex;
+	flex-direction: column;
+	gap: 20px;
+}
+
+.wrapper {
+	display: flex;
+	align-items: center;
+	width: 100%;
+	min-height: 336px;
+
+	> .root {
+		width: 100%;
+	}
+}
+
+.avatar {
+	margin: 0 auto;
+	background-color: color-mix(in srgb, var(--fg), transparent 85%);
+	color: color-mix(in srgb, var(--fg), transparent 25%);
+	text-align: center;
+	height: 64px;
+	width: 64px;
+	font-size: 24px;
+	line-height: 64px;
+	border-radius: 50%;
+}
+
+.instanceManualSelectButton {
+	display: block;
+	text-align: center;
+	opacity: .7;
+	font-size: .8em;
+
+	&:hover {
+		text-decoration: underline;
+	}
+}
+
+.orHr {
+	position: relative;
+	margin: .4em auto;
+	width: 100%;
+	height: 1px;
+	background: var(--divider);
+}
+
+.orMsg {
+	position: absolute;
+	top: -.6em;
+	display: inline-block;
+	padding: 0 1em;
+	background: var(--panel);
+	font-size: 0.8em;
+	color: var(--fgOnPanel);
+	margin: 0;
+	left: 50%;
+	transform: translateX(-50%);
+}
+</style>
--- a/packages/frontend/src/components/MkSignin.passkey.vue
+++ b/packages/frontend/src/components/MkSignin.passkey.vue
@ -0,0 +1,92 @@
+<!--
+SPDX-FileCopyrightText: syuilo and misskey-project
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
+<template>
+<div :class="$style.wrapper">
+	<div class="_gaps" :class="$style.root">
+		<div class="_gaps_s">
+			<div :class="$style.passkeyIcon">
+				<i class="ti ti-fingerprint"></i>
+			</div>
+			<div :class="$style.passkeyDescription">{{ i18n.ts.useSecurityKey }}</div>
+		</div>
+
+		<MkButton large primary rounded :disabled="queryingKey" style="margin: 0 auto;" @click="queryKey">{{ i18n.ts.retry }}</MkButton>
+
+		<MkButton v-if="isPerformingPasswordlessLogin !== true" transparent rounded :disabled="queryingKey" style="margin: 0 auto;" @click="emit('useTotp')">{{ i18n.ts.useTotp }}</MkButton>
+	</div>
+</div>
+</template>
+
+<script setup lang="ts">
+import { ref, onMounted } from 'vue';
+import { get as webAuthnRequest } from '@github/webauthn-json/browser-ponyfill';
+
+import { i18n } from '@/i18n.js';
+
+import MkButton from '@/components/MkButton.vue';
+
+import type { AuthenticationPublicKeyCredential } from '@github/webauthn-json/browser-ponyfill';
+
+const props = defineProps<{
+	credentialRequest: CredentialRequestOptions;
+	isPerformingPasswordlessLogin?: boolean;
+}>();
+
+const emit = defineEmits<{
+	(ev: 'done', credential: AuthenticationPublicKeyCredential): void;
+	(ev: 'useTotp'): void;
+}>();
+
+const queryingKey = ref(true);
+
+async function queryKey() {
+	queryingKey.value = true;
+	await webAuthnRequest(props.credentialRequest)
+		.catch(() => {
+			return Promise.reject(null);
+		})
+		.then((credential) => {
+			emit('done', credential);
+		})
+		.finally(() => {
+			queryingKey.value = false;
+		});
+}
+
+onMounted(() => {
+	queryKey();
+});
+</script>
+
+<style lang="scss" module>
+.wrapper {
+	display: flex;
+	align-items: center;
+	width: 100%;
+	min-height: 336px;
+
+	> .root {
+		width: 100%;
+	}
+}
+
+.passkeyIcon {
+	margin: 0 auto;
+	background-color: var(--accentedBg);
+	color: var(--accent);
+	text-align: center;
+	height: 64px;
+	width: 64px;
+	font-size: 24px;
+	line-height: 64px;
+	border-radius: 50%;
+}
+
+.passkeyDescription {
+	text-align: center;
+	font-size: 1.1em;
+}
+</style>
--- a/packages/frontend/src/components/MkSignin.password.vue
+++ b/packages/frontend/src/components/MkSignin.password.vue
@ -0,0 +1,181 @@
+<!--
+SPDX-FileCopyrightText: syuilo and misskey-project
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
+<template>
+<div :class="$style.wrapper" data-cy-signin-page-password>
+	<div class="_gaps" :class="$style.root">
+		<div :class="$style.avatar" :style="{ backgroundImage: user ? `url('${user.avatarUrl}')` : undefined }"></div>
+		<div :class="$style.welcomeBackMessage">
+			<I18n :src="i18n.ts.welcomeBackWithName" tag="span">
+				<template #name><Mfm :text="user.name ?? user.username" :plain="true"/></template>
+			</I18n>
+		</div>
+
+		<!-- password入力 -->
+		<form class="_gaps_s" @submit.prevent="onSubmit">
+			<!-- ブラウザ オートコンプリート用 -->
+			<input type="hidden" name="username" autocomplete="username" :value="user.username">
+
+			<MkInput v-model="password" :placeholder="i18n.ts.password" type="password" autocomplete="current-password webauthn" :withPasswordToggle="true" required autofocus data-cy-signin-password>
+				<template #prefix><i class="ti ti-lock"></i></template>
+				<template #caption><button class="_textButton" type="button" @click="resetPassword">{{ i18n.ts.forgotPassword }}</button></template>
+			</MkInput>
+
+			<div v-if="needCaptcha">
+				<MkCaptcha v-if="instance.enableHcaptcha" ref="hcaptcha" v-model="hCaptchaResponse" :class="$style.captcha" provider="hcaptcha" :sitekey="instance.hcaptchaSiteKey"/>
+				<MkCaptcha v-if="instance.enableMcaptcha" ref="mcaptcha" v-model="mCaptchaResponse" :class="$style.captcha" provider="mcaptcha" :sitekey="instance.mcaptchaSiteKey" :instanceUrl="instance.mcaptchaInstanceUrl"/>
+				<MkCaptcha v-if="instance.enableRecaptcha" ref="recaptcha" v-model="reCaptchaResponse" :class="$style.captcha" provider="recaptcha" :sitekey="instance.recaptchaSiteKey"/>
+				<MkCaptcha v-if="instance.enableTurnstile" ref="turnstile" v-model="turnstileResponse" :class="$style.captcha" provider="turnstile" :sitekey="instance.turnstileSiteKey"/>
+			</div>
+
+			<MkButton type="submit" :disabled="needCaptcha && captchaFailed" large primary rounded style="margin: 0 auto;" data-cy-signin-page-password-continue>{{ i18n.ts.continue }} <i class="ti ti-arrow-right"></i></MkButton>
+		</form>
+	</div>
+</div>
+</template>
+
+<script lang="ts">
+export type PwResponse = {
+	password: string;
+	captcha: {
+		hCaptchaResponse: string | null;
+		mCaptchaResponse: string | null;
+		reCaptchaResponse: string | null;
+		turnstileResponse: string | null;
+	};
+};
+</script>
+
+<script setup lang="ts">
+import { ref, computed, useTemplateRef, defineAsyncComponent } from 'vue';
+import * as Misskey from 'misskey-js';
+
+import { instance } from '@/instance.js';
+import { i18n } from '@/i18n.js';
+import * as os from '@/os.js';
+
+import MkButton from '@/components/MkButton.vue';
+import MkInput from '@/components/MkInput.vue';
+import MkCaptcha from '@/components/MkCaptcha.vue';
+
+const props = defineProps<{
+	user: Misskey.entities.UserDetailed;
+	needCaptcha: boolean;
+}>();
+
+const emit = defineEmits<{
+	(ev: 'passwordSubmitted', v: PwResponse): void;
+}>();
+
+const password = ref('');
+
+const hCaptcha = useTemplateRef('hcaptcha');
+const mCaptcha = useTemplateRef('mcaptcha');
+const reCaptcha = useTemplateRef('recaptcha');
+const turnstile = useTemplateRef('turnstile');
+
+const hCaptchaResponse = ref<string | null>(null);
+const mCaptchaResponse = ref<string | null>(null);
+const reCaptchaResponse = ref<string | null>(null);
+const turnstileResponse = ref<string | null>(null);
+
+const captchaFailed = computed((): boolean => {
+	return (
+		(instance.enableHcaptcha && !hCaptchaResponse.value) ||
+		(instance.enableMcaptcha && !mCaptchaResponse.value) ||
+		(instance.enableRecaptcha && !reCaptchaResponse.value) ||
+		(instance.enableTurnstile && !turnstileResponse.value)
+	);
+});
+
+function resetPassword(): void {
+	const { dispose } = os.popup(defineAsyncComponent(() => import('@/components/MkForgotPassword.vue')), {}, {
+		closed: () => dispose(),
+	});
+}
+
+function onSubmit() {
+	emit('passwordSubmitted', {
+		password: password.value,
+		captcha: {
+			hCaptchaResponse: hCaptchaResponse.value,
+			mCaptchaResponse: mCaptchaResponse.value,
+			reCaptchaResponse: reCaptchaResponse.value,
+			turnstileResponse: turnstileResponse.value,
+		},
+	});
+}
+
+function resetCaptcha() {
+	hCaptcha.value?.reset();
+	mCaptcha.value?.reset();
+	reCaptcha.value?.reset();
+	turnstile.value?.reset();
+}
+
+defineExpose({
+	resetCaptcha,
+});
+</script>
+
+<style lang="scss" module>
+.wrapper {
+	display: flex;
+	align-items: center;
+	width: 100%;
+	min-height: 336px;
+
+	> .root {
+		width: 100%;
+	}
+}
+
+.avatar {
+	margin: 0 auto 0 auto;
+	width: 64px;
+	height: 64px;
+	background: #ddd;
+	background-position: center;
+	background-size: cover;
+	border-radius: 100%;
+}
+
+.welcomeBackMessage {
+	text-align: center;
+	font-size: 1.1em;
+}
+
+.instanceManualSelectButton {
+	display: block;
+	text-align: center;
+	opacity: .7;
+	font-size: .8em;
+
+	&:hover {
+		text-decoration: underline;
+	}
+}
+
+.orHr {
+	position: relative;
+	margin: .4em auto;
+	width: 100%;
+	height: 1px;
+	background: var(--divider);
+}
+
+.orMsg {
+	position: absolute;
+	top: -.6em;
+	display: inline-block;
+	padding: 0 1em;
+	background: var(--panel);
+	font-size: 0.8em;
+	color: var(--fgOnPanel);
+	margin: 0;
+	left: 50%;
+	transform: translateX(-50%);
+}
+</style>
--- a/packages/frontend/src/components/MkSignin.totp.vue
+++ b/packages/frontend/src/components/MkSignin.totp.vue
@ -0,0 +1,74 @@
+<!--
+SPDX-FileCopyrightText: syuilo and misskey-project
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
+<template>
+<div :class="$style.wrapper">
+	<div class="_gaps" :class="$style.root">
+		<div class="_gaps_s">
+			<div :class="$style.totpIcon">
+				<i class="ti ti-key"></i>
+			</div>
+			<div :class="$style.totpDescription">{{ i18n.ts['2fa'] }}</div>
+		</div>
+
+		<!-- totp入力 -->
+		<form class="_gaps_s" @submit.prevent="emit('totpSubmitted', token)">
+			<MkInput v-model="token" type="text" :pattern="isBackupCode ? '^[A-Z0-9]{32}$' :'^[0-9]{6}$'" autocomplete="one-time-code" required autofocus :spellcheck="false" :inputmode="isBackupCode ? undefined : 'numeric'">
+				<template #label>{{ i18n.ts.token }} ({{ i18n.ts['2fa'] }})</template>
+				<template #prefix><i v-if="isBackupCode" class="ti ti-key"></i><i v-else class="ti ti-123"></i></template>
+				<template #caption><button class="_textButton" type="button" @click="isBackupCode = !isBackupCode">{{ isBackupCode ? i18n.ts.useTotp : i18n.ts.useBackupCode }}</button></template>
+			</MkInput>
+
+			<MkButton type="submit" large primary rounded style="margin: 0 auto;">{{ i18n.ts.continue }} <i class="ti ti-arrow-right"></i></MkButton>
+		</form>
+	</div>
+</div>
+</template>
+
+<script setup lang="ts">
+import { ref } from 'vue';
+
+import { i18n } from '@/i18n.js';
+
+import MkButton from '@/components/MkButton.vue';
+import MkInput from '@/components/MkInput.vue';
+
+const emit = defineEmits<{
+	(ev: 'totpSubmitted', token: string): void;
+}>();
+
+const token = ref('');
+const isBackupCode = ref(false);
+</script>
+
+<style lang="scss" module>
+.wrapper {
+	display: flex;
+	align-items: center;
+	width: 100%;
+	min-height: 336px;
+
+	> .root {
+		width: 100%;
+	}
+}
+
+.totpIcon {
+	margin: 0 auto;
+	background-color: var(--accentedBg);
+	color: var(--accent);
+	text-align: center;
+	height: 64px;
+	width: 64px;
+	font-size: 24px;
+	line-height: 64px;
+	border-radius: 50%;
+}
+
+.totpDescription {
+	text-align: center;
+	font-size: 1.1em;
+}
+</style>
--- a/packages/frontend/src/components/MkSignin.vue
+++ b/packages/frontend/src/components/MkSignin.vue
@ -4,269 +4,275 @@ SPDX-License-Identifier: AGPL-3.0-only
 -->

 <template>
-<form :class="{ signing, totpLogin }" @submit.prevent="onSubmit">
-	<div class="_gaps_m">
-		<div v-show="withAvatar" :class="$style.avatar" :style="{ backgroundImage: user ? `url('${user.avatarUrl}')` : undefined, marginBottom: message ? '1.5em' : undefined }"></div>
-		<MkInfo v-if="message">
-			{{ message }}
-		</MkInfo>
-		<div v-if="openOnRemote" class="_gaps_m">
-			<div class="_gaps_s">
-				<MkButton type="button" rounded primary style="margin: 0 auto;" @click="openRemote(openOnRemote)">
-					{{ i18n.ts.continueOnRemote }} <i class="ti ti-external-link"></i>
-				</MkButton>
-				<button type="button" class="_button" :class="$style.instanceManualSelectButton" @click="specifyHostAndOpenRemote(openOnRemote)">
-					{{ i18n.ts.specifyServerHost }}
-				</button>
+<div :class="$style.signinRoot">
+	<Transition
+		mode="out-in"
+		:enterActiveClass="$style.transition_enterActive"
+		:leaveActiveClass="$style.transition_leaveActive"
+		:enterFromClass="$style.transition_enterFrom"
+		:leaveToClass="$style.transition_leaveTo"
+
+		:inert="waiting"
+	>
+		<!-- 1. 外部サーバーへの転送・username入力・パスキー -->
+		<XInput
+			v-if="page === 'input'"
+			key="input"
+			:message="message"
+			:openOnRemote="openOnRemote"
+
+			@usernameSubmitted="onUsernameSubmitted"
+			@passkeyClick="onPasskeyLogin"
+		/>
+
+		<!-- 2. パスワード入力 -->
+		<XPassword
+			v-else-if="page === 'password'"
+			key="password"
+			ref="passwordPageEl"
+
+			:user="userInfo!"
+			:needCaptcha="needCaptcha"
+
+			@passwordSubmitted="onPasswordSubmitted"
+		/>
+
+		<!-- 3. ワンタイムパスワード -->
+		<XTotp
+			v-else-if="page === 'totp'"
+			key="totp"
+
+			@totpSubmitted="onTotpSubmitted"
+		/>
+
+		<!-- 4. パスキー -->
+		<XPasskey
+			v-else-if="page === 'passkey'"
+			key="passkey"
+
+			:credentialRequest="credentialRequest!"
+			:isPerformingPasswordlessLogin="doingPasskeyFromInputPage"
+
+			@done="onPasskeyDone"
+			@useTotp="onUseTotp"
+		/>
+	</Transition>
+	<div v-if="waiting" :class="$style.waitingRoot">
+		<MkLoading/>
 	</div>
-			<div :class="$style.orHr">
-				<p :class="$style.orMsg">{{ i18n.ts.or }}</p>
-			</div>
-		</div>
-		<div v-if="!totpLogin" class="normal-signin _gaps_m">
-			<MkInput v-model="username" :placeholder="i18n.ts.username" type="text" pattern="^[a-zA-Z0-9_]+$" :spellcheck="false" autocomplete="username webauthn" autofocus required data-cy-signin-username @update:modelValue="onUsernameChange">
-				<template #prefix>@</template>
-				<template #suffix>@{{ host }}</template>
-			</MkInput>
-			<MkInput v-model="password" :placeholder="i18n.ts.password" type="password" autocomplete="current-password webauthn" :withPasswordToggle="true" required data-cy-signin-password>
-				<template #prefix><i class="ti ti-lock"></i></template>
-				<template #caption><button class="_textButton" type="button" @click="resetPassword">{{ i18n.ts.forgotPassword }}</button></template>
-			</MkInput>
-			<MkCaptcha v-if="instance.enableHcaptcha" ref="hcaptcha" v-model="hCaptchaResponse" :class="$style.captcha" provider="hcaptcha" :sitekey="instance.hcaptchaSiteKey"/>
-			<MkCaptcha v-if="instance.enableMcaptcha" ref="mcaptcha" v-model="mCaptchaResponse" :class="$style.captcha" provider="mcaptcha" :sitekey="instance.mcaptchaSiteKey" :instanceUrl="instance.mcaptchaInstanceUrl"/>
-			<MkCaptcha v-if="instance.enableRecaptcha" ref="recaptcha" v-model="reCaptchaResponse" :class="$style.captcha" provider="recaptcha" :sitekey="instance.recaptchaSiteKey"/>
-			<MkCaptcha v-if="instance.enableTurnstile" ref="turnstile" v-model="turnstileResponse" :class="$style.captcha" provider="turnstile" :sitekey="instance.turnstileSiteKey"/>
-			<MkButton type="submit" large primary rounded :disabled="captchaFailed || signing" style="margin: 0 auto;">{{ signing ? i18n.ts.loggingIn : i18n.ts.login }}</MkButton>
-		</div>
-		<div v-if="totpLogin" class="2fa-signin" :class="{ securityKeys: user && user.securityKeys }">
-			<div v-if="user && user.securityKeys" class="twofa-group tap-group">
-				<p>{{ i18n.ts.useSecurityKey }}</p>
-				<MkButton v-if="!queryingKey" @click="query2FaKey">
-					{{ i18n.ts.retry }}
-				</MkButton>
-			</div>
-			<div v-if="user && user.securityKeys" :class="$style.orHr">
-				<p :class="$style.orMsg">{{ i18n.ts.or }}</p>
-			</div>
-			<div class="twofa-group totp-group _gaps">
-				<MkInput v-model="token" type="text" :pattern="isBackupCode ? '^[A-Z0-9]{32}$' :'^[0-9]{6}$'" autocomplete="one-time-code" required :spellcheck="false" :inputmode="isBackupCode ? undefined : 'numeric'">
-					<template #label>{{ i18n.ts.token }} ({{ i18n.ts['2fa'] }})</template>
-					<template #prefix><i v-if="isBackupCode" class="ti ti-key"></i><i v-else class="ti ti-123"></i></template>
-					<template #caption><button class="_textButton" type="button" @click="isBackupCode = !isBackupCode">{{ isBackupCode ? i18n.ts.useTotp : i18n.ts.useBackupCode }}</button></template>
-				</MkInput>
-				<MkButton type="submit" :disabled="signing" large primary rounded style="margin: 0 auto;">{{ signing ? i18n.ts.loggingIn : i18n.ts.login }}</MkButton>
-			</div>
-		</div>
-		<div v-if="!totpLogin && usePasswordLessLogin" :class="$style.orHr">
-			<p :class="$style.orMsg">{{ i18n.ts.or }}</p>
-		</div>
-		<div v-if="!totpLogin && usePasswordLessLogin" class="twofa-group tap-group">
-			<MkButton v-if="!queryingKey" type="submit" :disabled="signing" style="margin: auto auto;" rounded large primary @click="onPasskeyLogin">
-				<i class="ti ti-device-usb" style="font-size: medium;"></i>
-				{{ signing ? i18n.ts.loggingIn : i18n.ts.signinWithPasskey }}
-			</MkButton>
-			<p v-if="queryingKey">{{ i18n.ts.useSecurityKey }}</p>
-		</div>
-	</div>
-</form>
+</div>
 </template>

-<script lang="ts" setup>
-import { computed, defineAsyncComponent, ref } from 'vue';
-import { toUnicode } from 'punycode/';
+<script setup lang="ts">
+import { nextTick, onBeforeUnmount, ref, shallowRef, useTemplateRef } from 'vue';
 import * as Misskey from 'misskey-js';
-import { supported as webAuthnSupported, get as webAuthnRequest, parseRequestOptionsFromJSON } from '@github/webauthn-json/browser-ponyfill';
-import { query, extractDomain } from '@@/js/url.js';
-import { host as configHost } from '@@/js/config.js';
-import MkDivider from './MkDivider.vue';
-import type { OpenOnRemoteOptions } from '@/scripts/please-login.js';
-import { showSuspendedDialog } from '@/scripts/show-suspended-dialog.js';
-import MkButton from '@/components/MkButton.vue';
-import MkInput from '@/components/MkInput.vue';
-import MkInfo from '@/components/MkInfo.vue';
-import * as os from '@/os.js';
+import { supported as webAuthnSupported, parseRequestOptionsFromJSON } from '@github/webauthn-json/browser-ponyfill';
+
 import { misskeyApi } from '@/scripts/misskey-api.js';
+import { showSuspendedDialog } from '@/scripts/show-suspended-dialog.js';
 import { login } from '@/account.js';
 import { i18n } from '@/i18n.js';
-import { instance } from '@/instance.js';
-import MkCaptcha, { type Captcha } from '@/components/MkCaptcha.vue';
+import * as os from '@/os.js';

-const signing = ref(false);
-const user = ref<Misskey.entities.UserDetailed | null>(null);
-const usePasswordLessLogin = ref<Misskey.entities.UserDetailed['usePasswordLessLogin']>(true);
-const username = ref('');
-const password = ref('');
-const token = ref('');
-const host = ref(toUnicode(configHost));
-const totpLogin = ref(false);
-const isBackupCode = ref(false);
-const queryingKey = ref(false);
-let credentialRequest: CredentialRequestOptions | null = null;
-const passkey_context = ref('');
-const hcaptcha = ref<Captcha | undefined>();
-const mcaptcha = ref<Captcha | undefined>();
-const recaptcha = ref<Captcha | undefined>();
-const turnstile = ref<Captcha | undefined>();
-const hCaptchaResponse = ref<string | null>(null);
-const mCaptchaResponse = ref<string | null>(null);
-const reCaptchaResponse = ref<string | null>(null);
-const turnstileResponse = ref<string | null>(null);
+import XInput from '@/components/MkSignin.input.vue';
+import XPassword, { type PwResponse } from '@/components/MkSignin.password.vue';
+import XTotp from '@/components/MkSignin.totp.vue';
+import XPasskey from '@/components/MkSignin.passkey.vue';

-const captchaFailed = computed((): boolean => {
-	return (
-		instance.enableHcaptcha && !hCaptchaResponse.value ||
-		instance.enableMcaptcha && !mCaptchaResponse.value ||
-		instance.enableRecaptcha && !reCaptchaResponse.value ||
-		instance.enableTurnstile && !turnstileResponse.value);
-});
+import type { AuthenticationPublicKeyCredential } from '@github/webauthn-json/browser-ponyfill';
+import type { OpenOnRemoteOptions } from '@/scripts/please-login.js';

 const emit = defineEmits<{
-	(ev: 'login', v: any): void;
+	(ev: 'login', v: Misskey.entities.SigninResponse): void;
 }>();

 const props = withDefaults(defineProps<{
-	withAvatar?: boolean;
 	autoSet?: boolean;
 	message?: string,
 	openOnRemote?: OpenOnRemoteOptions,
 }>(), {
-	withAvatar: true,
 	autoSet: false,
 	message: '',
 	openOnRemote: undefined,
 });

-function onUsernameChange(): void {
-	misskeyApi('users/show', {
-		username: username.value,
-	}).then(userResponse => {
-		user.value = userResponse;
-		usePasswordLessLogin.value = userResponse.usePasswordLessLogin;
-	}, () => {
-		user.value = null;
-		usePasswordLessLogin.value = true;
-	});
-}
+const page = ref<'input' | 'password' | 'totp' | 'passkey'>('input');
+const waiting = ref(false);

-function onLogin(res: any): Promise<void> | void {
-	if (props.autoSet) {
-		return login(res.i);
-	}
-}
+const passwordPageEl = useTemplateRef('passwordPageEl');
+const needCaptcha = ref(false);

-async function query2FaKey(): Promise<void> {
-	if (credentialRequest == null) return;
-	queryingKey.value = true;
-	await webAuthnRequest(credentialRequest)
-		.catch(() => {
-			queryingKey.value = false;
-			return Promise.reject(null);
-		}).then(credential => {
-			credentialRequest = null;
-			queryingKey.value = false;
-			signing.value = true;
-			return misskeyApi('signin', {
-				username: username.value,
-				password: password.value,
-				credential: credential.toJSON(),
-			});
-		}).then(res => {
-			emit('login', res);
-			return onLogin(res);
-		}).catch(err => {
-			if (err === null) return;
-			os.alert({
-				type: 'error',
-				text: i18n.ts.signinFailed,
-			});
-			signing.value = false;
-		});
-}
+const userInfo = ref<null | Misskey.entities.UserDetailed>(null);
+const password = ref('');
+
+//#region Passkey Passwordless
+const credentialRequest = shallowRef<CredentialRequestOptions | null>(null);
+const passkeyContext = ref('');
+const doingPasskeyFromInputPage = ref(false);

 function onPasskeyLogin(): void {
-	signing.value = true;
 	if (webAuthnSupported()) {
+		doingPasskeyFromInputPage.value = true;
+		waiting.value = true;
 		misskeyApi('signin-with-passkey', {})
-			.then(res => {
-				totpLogin.value = false;
-				signing.value = false;
-				queryingKey.value = true;
-				passkey_context.value = res.context ?? '';
-				credentialRequest = parseRequestOptionsFromJSON({
+			.then((res) => {
+				passkeyContext.value = res.context ?? '';
+				credentialRequest.value = parseRequestOptionsFromJSON({
 					publicKey: res.option,
 				});
+
+				page.value = 'passkey';
+				waiting.value = false;
 			})
-			.then(() => queryPasskey())
-			.catch(loginFailed);
+			.catch(onLoginFailed);
 	}
 }

-async function queryPasskey(): Promise<void> {
-	if (credentialRequest == null) return;
-	queryingKey.value = true;
-	console.log('Waiting passkey auth...');
-	await webAuthnRequest(credentialRequest)
-		.catch((err) => {
-			console.warn('Passkey Auth fail!: ', err);
-			queryingKey.value = false;
-			return Promise.reject(null);
-		}).then(credential => {
-			credentialRequest = null;
-			queryingKey.value = false;
-			signing.value = true;
-			return misskeyApi('signin-with-passkey', {
+function onPasskeyDone(credential: AuthenticationPublicKeyCredential): void {
+	waiting.value = true;
+
+	if (doingPasskeyFromInputPage.value) {
+		misskeyApi('signin-with-passkey', {
 			credential: credential.toJSON(),
-				context: passkey_context.value,
-			});
-		}).then(res => {
+			context: passkeyContext.value,
+		}).then((res) => {
+			if (res.signinResponse == null) {
+				onLoginFailed();
+				return;
+			}
 			emit('login', res.signinResponse);
-			return onLogin(res.signinResponse);
+		}).catch(onLoginFailed);
+	} else if (userInfo.value != null) {
+		tryLogin({
+			username: userInfo.value.username,
+			password: password.value,
+			credential: credential.toJSON(),
+		});
+	}
+}
+
+function onUseTotp(): void {
+	page.value = 'totp';
+}
+//#endregion
+
+async function onUsernameSubmitted(username: string) {
+	waiting.value = true;
+
+	userInfo.value = await misskeyApi('users/show', {
+		username,
+	}).catch(() => null);
+
+	await tryLogin({
+		username,
 	});
 }

-function onSubmit(): void {
-	signing.value = true;
-	if (!totpLogin.value && user.value && user.value.twoFactorEnabled) {
-		if (webAuthnSupported() && user.value.securityKeys) {
-			misskeyApi('signin', {
-				username: username.value,
-				password: password.value,
-			}).then(res => {
-				totpLogin.value = true;
-				signing.value = false;
-				credentialRequest = parseRequestOptionsFromJSON({
-					publicKey: res,
+async function onPasswordSubmitted(pw: PwResponse) {
+	waiting.value = true;
+	password.value = pw.password;
+
+	if (userInfo.value == null) {
+		await os.alert({
+			type: 'error',
+			title: i18n.ts.noSuchUser,
+			text: i18n.ts.signinFailed,
 		});
-			})
-				.then(() => query2FaKey())
-				.catch(loginFailed);
+		waiting.value = false;
+		return;
 	} else {
-			totpLogin.value = true;
-			signing.value = false;
+		await tryLogin({
+			username: userInfo.value.username,
+			password: pw.password,
+			'hcaptcha-response': pw.captcha.hCaptchaResponse,
+			'm-captcha-response': pw.captcha.mCaptchaResponse,
+			'g-recaptcha-response': pw.captcha.reCaptchaResponse,
+			'turnstile-response': pw.captcha.turnstileResponse,
+		});
 	}
+}
+
+async function onTotpSubmitted(token: string) {
+	waiting.value = true;
+
+	if (userInfo.value == null) {
+		await os.alert({
+			type: 'error',
+			title: i18n.ts.noSuchUser,
+			text: i18n.ts.signinFailed,
+		});
+		waiting.value = false;
+		return;
 	} else {
-		misskeyApi('signin', {
-			username: username.value,
+		await tryLogin({
+			username: userInfo.value.username,
 			password: password.value,
-			'hcaptcha-response': hCaptchaResponse.value,
-			'm-captcha-response': mCaptchaResponse.value,
-			'g-recaptcha-response': reCaptchaResponse.value,
-			'turnstile-response': turnstileResponse.value,
-			token: user.value?.twoFactorEnabled ? token.value : undefined,
-		}).then(res => {
+			token,
+		});
+	}
+}
+
+async function tryLogin(req: Partial<Misskey.entities.SigninRequest>): Promise<Misskey.entities.SigninResponse> {
+	const _req = {
+		username: req.username ?? userInfo.value?.username,
+		...req,
+	};
+
+	function assertIsSigninRequest(x: Partial<Misskey.entities.SigninRequest>): x is Misskey.entities.SigninRequest {
+		return x.username != null;
+	}
+
+	if (!assertIsSigninRequest(_req)) {
+		throw new Error('Invalid request');
+	}
+
+	return await misskeyApi('signin', _req).then(async (res) => {
 		emit('login', res);
-			onLogin(res);
-		}).catch(loginFailed);
+		await onLoginSucceeded(res);
+		return res;
+	}).catch((err) => {
+		onLoginFailed(err);
+		return Promise.reject(err);
+	});
+}
+
+async function onLoginSucceeded(res: Misskey.entities.SigninResponse) {
+	if (props.autoSet) {
+		await login(res.i);
 	}
 }

-function loginFailed(err: any): void {
-	hcaptcha.value?.reset?.();
-	mcaptcha.value?.reset?.();
-	recaptcha.value?.reset?.();
-	turnstile.value?.reset?.();
+function onLoginFailed(err?: any): void {
+	const id = err?.id ?? null;

-	switch (err.id) {
+	if (typeof err === 'object' && 'next' in err) {
+		switch (err.next) {
+			case 'captcha': {
+				page.value = 'password';
+				break;
+			}
+			case 'password': {
+				page.value = 'password';
+				break;
+			}
+			case 'totp': {
+				page.value = 'totp';
+				break;
+			}
+			case 'passkey': {
+				if (webAuthnSupported() && 'authRequest' in err) {
+					credentialRequest.value = parseRequestOptionsFromJSON({
+						publicKey: err.authRequest,
+					});
+					page.value = 'passkey';
+				} else {
+					page.value = 'totp';
+				}
+				break;
+			}
+		}
+	} else {
+		switch (id) {
 			case '6cc579cc-885d-43d8-95c2-b8c7fc963280': {
 				os.alert({
 					type: 'error',
@ -295,6 +301,14 @@ function loginFailed(err: any): void {
 				});
 				break;
 			}
+			case 'cdf1235b-ac71-46d4-a3a6-84ccce48df6f': {
+				os.alert({
+					type: 'error',
+					title: i18n.ts.loginFailed,
+					text: i18n.ts.incorrectTotp,
+				});
+				break;
+			}
 			case '36b96a7d-b547-412d-aeed-2d611cdc8cdc': {
 				os.alert({
 					type: 'error',
@ -303,6 +317,14 @@ function loginFailed(err: any): void {
 				});
 				break;
 			}
+			case '93b86c4b-72f9-40eb-9815-798928603d1e': {
+				os.alert({
+					type: 'error',
+					title: i18n.ts.loginFailed,
+					text: i18n.ts.passkeyVerificationFailed,
+				});
+				break;
+			}
 			case 'b18c89a7-5b5e-4cec-bb5b-0419f332d430': {
 				os.alert({
 					type: 'error',
@ -328,114 +350,56 @@ function loginFailed(err: any): void {
 				});
 			}
 		}
+	}

-	totpLogin.value = false;
-	signing.value = false;
-}
-
-function resetPassword(): void {
-	const { dispose } = os.popup(defineAsyncComponent(() => import('@/components/MkForgotPassword.vue')), {}, {
-		closed: () => dispose(),
+	if (doingPasskeyFromInputPage.value === true) {
+		doingPasskeyFromInputPage.value = false;
+		page.value = 'input';
+		password.value = '';
+	}
+	passwordPageEl.value?.resetCaptcha();
+	nextTick(() => {
+		waiting.value = false;
 	});
 }

-function openRemote(options: OpenOnRemoteOptions, targetHost?: string): void {
-	switch (options.type) {
-		case 'web':
-		case 'lookup': {
-			let _path: string;
-
-			if (options.type === 'lookup') {
-				// TODO: v2024.7.0以降が浸透してきたら正式なURLに変更する▼
-				// _path = `/lookup?uri=${encodeURIComponent(_path)}`;
-				_path = `/authorize-follow?acct=${encodeURIComponent(options.url)}`;
-			} else {
-				_path = options.path;
-			}
-
-			if (targetHost) {
-				window.open(`https://${targetHost}${_path}`, '_blank', 'noopener');
-			} else {
-				window.open(`https://misskey-hub.net/mi-web/?path=${encodeURIComponent(_path)}`, '_blank', 'noopener');
-			}
-			break;
-		}
-		case 'share': {
-			const params = query(options.params);
-			if (targetHost) {
-				window.open(`https://${targetHost}/share?${params}`, '_blank', 'noopener');
-			} else {
-				window.open(`https://misskey-hub.net/share/?${params}`, '_blank', 'noopener');
-			}
-			break;
-		}
-	}
-}
-
-async function specifyHostAndOpenRemote(options: OpenOnRemoteOptions): Promise<void> {
-	const { canceled, result: hostTemp } = await os.inputText({
-		title: i18n.ts.inputHostName,
-		placeholder: 'misskey.example.com',
-	});
-
-	if (canceled) return;
-
-	let targetHost: string | null = hostTemp;
-
-	// ドメイン部分だけを取り出す
-	targetHost = extractDomain(targetHost);
-	if (targetHost == null) {
-		os.alert({
-			type: 'error',
-			title: i18n.ts.invalidValue,
-			text: i18n.ts.tryAgain,
-		});
-		return;
-	}
-	openRemote(options, targetHost);
-}
+onBeforeUnmount(() => {
+	password.value = '';
+	userInfo.value = null;
+});
 </script>

 <style lang="scss" module>
-.avatar {
-	margin: 0 auto 0 auto;
-	width: 64px;
-	height: 64px;
-	background: #ddd;
-	background-position: center;
-	background-size: cover;
-	border-radius: 100%;
+.transition_enterActive,
+.transition_leaveActive {
+	transition: opacity 0.3s cubic-bezier(0,0,.35,1), transform 0.3s cubic-bezier(0,0,.35,1);
+}
+.transition_enterFrom {
+	opacity: 0;
+	transform: translateX(50px);
+}
+.transition_leaveTo {
+	opacity: 0;
+	transform: translateX(-50px);
 }

-.instanceManualSelectButton {
-	display: block;
-	text-align: center;
-	opacity: .7;
-	font-size: .8em;
+.signinRoot {
+	overflow-x: hidden;
+	overflow-x: clip;

-	&:hover {
-		text-decoration: underline;
-	}
-}
-
-.orHr {
 	position: relative;
-	margin: .4em auto;
-	width: 100%;
-	height: 1px;
-	background: var(--divider);
 }

-.orMsg {
+.waitingRoot {
 	position: absolute;
-	top: -.6em;
-	display: inline-block;
-	padding: 0 1em;
-	background: var(--panel);
-	font-size: 0.8em;
-	color: var(--fgOnPanel);
-	margin: 0;
-	left: 50%;
-	transform: translateX(-50%);
+	top: 0;
+	left: 0;
+	width: 100%;
+	height: 100%;
+	background-color: color-mix(in srgb, var(--panel), transparent 50%);
+	display: flex;
+	justify-content: center;
+	align-items: center;
+	z-index: 1;
 }
 </style>
--- a/packages/frontend/src/components/MkSigninDialog.vue
+++ b/packages/frontend/src/components/MkSigninDialog.vue
@ -4,26 +4,29 @@ SPDX-License-Identifier: AGPL-3.0-only
 -->

 <template>
-<MkModalWindow
-	ref="dialog"
-	:width="400"
-	:height="450"
-	@close="onClose"
+<MkModal
+	ref="modal"
+	:preferType="'dialog'"
+	@click="onClose"
 	@closed="emit('closed')"
 >
-	<template #header>{{ i18n.ts.login }}</template>
-
-	<MkSpacer :marginMin="20" :marginMax="28">
+	<div :class="$style.root">
+		<div :class="$style.header">
+			<div :class="$style.headerText"><i class="ti ti-login-2"></i> {{ i18n.ts.login }}</div>
+			<button :class="$style.closeButton" class="_button" @click="onClose"><i class="ti ti-x"></i></button>
+		</div>
+		<div :class="$style.content">
 			<MkSignin :autoSet="autoSet" :message="message" :openOnRemote="openOnRemote" @login="onLogin"/>
-	</MkSpacer>
-</MkModalWindow>
+		</div>
+	</div>
+</MkModal>
 </template>

 <script lang="ts" setup>
 import { shallowRef } from 'vue';
 import type { OpenOnRemoteOptions } from '@/scripts/please-login.js';
 import MkSignin from '@/components/MkSignin.vue';
-import MkModalWindow from '@/components/MkModalWindow.vue';
+import MkModal from '@/components/MkModal.vue';
 import { i18n } from '@/i18n.js';

 withDefaults(defineProps<{
@ -42,15 +45,62 @@ const emit = defineEmits<{
 	(ev: 'cancelled'): void;
 }>();

-const dialog = shallowRef<InstanceType<typeof MkModalWindow>>();
+const modal = shallowRef<InstanceType<typeof MkModal>>();

 function onClose() {
 	emit('cancelled');
-	if (dialog.value) dialog.value.close();
+	if (modal.value) modal.value.close();
 }

 function onLogin(res) {
 	emit('done', res);
-	if (dialog.value) dialog.value.close();
+	if (modal.value) modal.value.close();
 }
 </script>
+
+<style lang="scss" module>
+.root {
+	overflow: auto;
+	margin: auto;
+	position: relative;
+	width: 100%;
+	max-width: 400px;
+	height: 100%;
+	max-height: 450px;
+	box-sizing: border-box;
+	background: var(--panel);
+	border-radius: var(--radius);
+}
+
+.header {
+	position: sticky;
+	top: 0;
+	left: 0;
+	width: 100%;
+	height: 50px;
+	box-sizing: border-box;
+	display: flex;
+	align-items: center;
+	font-weight: bold;
+	backdrop-filter: var(--blur, blur(15px));
+	background: var(--acrylicBg);
+	z-index: 1;
+}
+
+.headerText {
+	padding: 0 20px;
+	box-sizing: border-box;
+}
+
+.closeButton {
+	margin-left: auto;
+	padding: 16px;
+	font-size: 16px;
+	line-height: 16px;
+}
+
+.content {
+	padding: 32px;
+	box-sizing: border-box;
+}
+</style>
--- a/packages/misskey-js/etc/misskey-js.api.md
+++ b/packages/misskey-js/etc/misskey-js.api.md
@ -3040,7 +3040,7 @@ type Signin = components['schemas']['Signin'];
 // @public (undocumented)
 type SigninRequest = {
    username: string;
-    password: string;
+    password?: string;
    token?: string;
    credential?: AuthenticationResponseJSON;
    'hcaptcha-response'?: string | null;
--- a/packages/misskey-js/src/autogen/types.ts
+++ b/packages/misskey-js/src/autogen/types.ts
@ -3782,16 +3782,13 @@ export type components = {
      followingVisibility: 'public' | 'followers' | 'private';
      /** @enum {string} */
      followersVisibility: 'public' | 'followers' | 'private';
-      /** @default false */
-      twoFactorEnabled: boolean;
-      /** @default false */
-      usePasswordLessLogin: boolean;
-      /** @default false */
-      securityKeys: boolean;
      roles: components['schemas']['RoleLite'][];
      followedMessage?: string | null;
      memo: string | null;
      moderationNote?: string;
+      twoFactorEnabled?: boolean;
+      usePasswordLessLogin?: boolean;
+      securityKeys?: boolean;
      isFollowing?: boolean;
      isFollowed?: boolean;
      hasPendingFollowRequestFromYou?: boolean;
@ -3972,6 +3969,12 @@ export type components = {
        }[];
      loggedInDays: number;
      policies: components['schemas']['RolePolicies'];
+      /** @default false */
+      twoFactorEnabled: boolean;
+      /** @default false */
+      usePasswordLessLogin: boolean;
+      /** @default false */
+      securityKeys: boolean;
      email?: string | null;
      emailVerified?: boolean | null;
      securityKeysList?: {
--- a/packages/misskey-js/src/entities.ts
+++ b/packages/misskey-js/src/entities.ts
@ -269,7 +269,7 @@ export type SignupPendingResponse = {

 export type SigninRequest = {
 	username: string;
-	password: string;
+	password?: string;
 	token?: string;
 	credential?: AuthenticationResponseJSON;
 	'hcaptcha-response'?: string | null;