1 files changed, 173 insertions, 0 deletions
diff --git a/packages/backend/src/server/api/SigninWithPasskeyApiService.ts b/packages/backend/src/server/api/SigninWithPasskeyApiService.ts
new file mode 100644
index 0000000000..9ba23c54e2
--- /dev/null
+++ b/packages/backend/src/server/api/SigninWithPasskeyApiService.ts
@@ -0,0 +1,173 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { randomUUID } from 'crypto';
+import { Inject, Injectable } from '@nestjs/common';
+import { IsNull } from 'typeorm';
+import { DI } from '@/di-symbols.js';
+import type {
+	SigninsRepository,
+	UserProfilesRepository,
+	UsersRepository,
+} from '@/models/_.js';
+import type { Config } from '@/config.js';
+import { getIpHash } from '@/misc/get-ip-hash.js';
+import type { MiLocalUser, MiUser } from '@/models/User.js';
+import { IdService } from '@/core/IdService.js';
+import { bindThis } from '@/decorators.js';
+import { WebAuthnService } from '@/core/WebAuthnService.js';
+import Logger from '@/logger.js';
+import { LoggerService } from '@/core/LoggerService.js';
+import type { IdentifiableError } from '@/misc/identifiable-error.js';
+import { RateLimiterService } from './RateLimiterService.js';
+import { SigninService } from './SigninService.js';
+import type { AuthenticationResponseJSON } from '@simplewebauthn/types';
+import type { FastifyReply, FastifyRequest } from 'fastify';
+
+@Injectable()
+export class SigninWithPasskeyApiService {
+	private logger: Logger;
+	constructor(
+		@Inject(DI.config)
+		private config: Config,
+
+		@Inject(DI.usersRepository)
+		private usersRepository: UsersRepository,
+
+		@Inject(DI.userProfilesRepository)
+		private userProfilesRepository: UserProfilesRepository,
+
+		@Inject(DI.signinsRepository)
+		private signinsRepository: SigninsRepository,
+
+		private idService: IdService,
+		private rateLimiterService: RateLimiterService,
+		private signinService: SigninService,
+		private webAuthnService: WebAuthnService,
+		private loggerService: LoggerService,
+	) {
+		this.logger = this.loggerService.getLogger('PasskeyAuth');
+	}
+
+	@bindThis
+	public async signin(
+		request: FastifyRequest<{
+			Body: {
+				credential?: AuthenticationResponseJSON;
+				context?: string;
+			};
+		}>,
+		reply: FastifyReply,
+	) {
+		reply.header('Access-Control-Allow-Origin', this.config.url);
+		reply.header('Access-Control-Allow-Credentials', 'true');
+
+		const body = request.body;
+		const credential = body['credential'];
+
+		function error(status: number, error: { id: string }) {
+			reply.code(status);
+			return { error };
+		}
+
+		const fail = async (userId: MiUser['id'], status?: number, failure?: { id: string }) => {
+			// Append signin history
+			await this.signinsRepository.insert({
+				id: this.idService.gen(),
+				userId: userId,
+				ip: request.ip,
+				headers: request.headers as any,
+				success: false,
+			});
+			return error(status ?? 500, failure ?? { id: '4e30e80c-e338-45a0-8c8f-44455efa3b76' });
+		};
+
+		try {
+			// Not more than 1 API call per 250ms and not more than 100 attempts per 30min
+			// NOTE: 1 Sign-in require 2 API calls
+			await this.rateLimiterService.limit({ key: 'signin-with-passkey', duration: 60 * 30 * 1000, max: 200, minInterval: 250 }, getIpHash(request.ip));
+		} catch (err) {
+			reply.code(429);
+			return {
+				error: {
+					message: 'Too many failed attempts to sign in. Try again later.',
+					code: 'TOO_MANY_AUTHENTICATION_FAILURES',
+					id: '22d05606-fbcf-421a-a2db-b32610dcfd1b',
+				},
+			};
+		}
+
+		// Initiate Passkey Auth challenge with context
+		if (!credential) {
+			const context = randomUUID();
+			this.logger.info(`Initiate Passkey challenge: context: ${context}`);
+			const authChallengeOptions = {
+				option: await this.webAuthnService.initiateSignInWithPasskeyAuthentication(context),
+				context: context,
+			};
+			reply.code(200);
+			return authChallengeOptions;
+		}
+
+		const context = body.context;
+		if (!context || typeof context !== 'string') {
+			// If try Authentication without context
+			return error(400, {
+				id: '1658cc2e-4495-461f-aee4-d403cdf073c1',
+			});
+		}
+
+		this.logger.debug(`Try Sign-in with Passkey: context: ${context}`);
+
+		let authorizedUserId: MiUser['id'] | null;
+		try {
+			authorizedUserId = await this.webAuthnService.verifySignInWithPasskeyAuthentication(context, credential);
+		} catch (err) {
+			this.logger.warn(`Passkey challenge Verify error! : ${err}`);
+			const errorId = (err as IdentifiableError).id;
+			return error(403, {
+				id: errorId,
+			});
+		}
+
+		if (!authorizedUserId) {
+			return error(403, {
+				id: '932c904e-9460-45b7-9ce6-7ed33be7eb2c',
+			});
+		}
+
+		// Fetch user
+		const user = await this.usersRepository.findOneBy({
+			id: authorizedUserId,
+			host: IsNull(),
+		}) as MiLocalUser | null;
+
+		if (user == null) {
+			return error(403, {
+				id: '652f899f-66d4-490e-993e-6606c8ec04c3',
+			});
+		}
+
+		if (user.isSuspended) {
+			return error(403, {
+				id: 'e03a5f46-d309-4865-9b69-56282d94e1eb',
+			});
+		}
+
+		const profile = await this.userProfilesRepository.findOneByOrFail({ userId: user.id });
+
+		// Authentication was successful, but passwordless login is not enabled
+		if (!profile.usePasswordLessLogin) {
+			return await fail(user.id, 403, {
+				id: '2d84773e-f7b7-4d0b-8f72-bb69b584c912',
+			});
+		}
+
+		const signinResponse = this.signinService.signin(request, reply, user);
+		return {
+			signinResponse: signinResponse,
+		};
+	}
+}