upd: add FriendlyCaptcha as a captcha solution

FriendlyCaptcha is a german captcha solution which is GDPR compliant and has a non-commerical free license

packages/backend/migration/1730505338000-friendlyCaptcha.js

@@ -0,0 +1,20 @@
+/*
+ * SPDX-FileCopyrightText: marie and other Sharkey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+export class friendlyCaptcha1730505338000 {
+	name = 'friendlyCaptcha1730505338000';
+
+	async up(queryRunner) {
+		await queryRunner.query(`ALTER TABLE "meta" ADD "enableFC" boolean NOT NULL DEFAULT false`, undefined);
+		await queryRunner.query(`ALTER TABLE "meta" ADD "fcSiteKey" character varying(1024)`, undefined);
+		await queryRunner.query(`ALTER TABLE "meta" ADD "fcSecretKey" character varying(1024)`, undefined);
+	}
+
+	async down(queryRunner) {
+		await queryRunner.query(`ALTER TABLE "meta" DROP COLUMN "fcSecretKey"`, undefined);
+		await queryRunner.query(`ALTER TABLE "meta" DROP COLUMN "fcSiteKey"`, undefined);
+		await queryRunner.query(`ALTER TABLE "meta" DROP COLUMN "enableFC"`, undefined);
+	}
+}

packages/backend/src/core/CaptchaService.ts

@@ -10,6 +10,7 @@ import { bindThis } from '@/decorators.js';
 type CaptchaResponse = {
 	success: boolean;
 	'error-codes'?: string[];
+	'errors'?: string[];
 };
 
 @Injectable()
@@ -73,6 +74,35 @@ export class CaptchaService {
 		}
 	}
 
+	@bindThis
+	public async verifyFriendlyCaptcha(secret: string, response: string | null | undefined): Promise<void> {
+		if (response == null) {
+			throw new Error('recaptcha-failed: no response provided');
+		}
+
+		const result = await this.httpRequestService.send('https://api.friendlycaptcha.com/api/v1/siteverify', {
+			method: 'POST',
+			body: JSON.stringify({
+				secret: secret,
+				solution: response,
+			}),
+			headers: {
+				'Content-Type': 'application/json',
+			},
+		});
+
+		if (result.status !== 200) {
+			throw new Error('frc-failed: frc didn\'t return 200 OK');
+		}
+
+		const resp = await result.json() as CaptchaResponse;
+
+		if (resp.success !== true) {
+			const errorCodes = resp['errors'] ? resp['errors'].join(', ') : '';
+			throw new Error(`frc-failed: ${errorCodes}`);
+		}
+	}
+
 	// https://codeberg.org/Gusted/mCaptcha/src/branch/main/mcaptcha.go
 	@bindThis
 	public async verifyMcaptcha(secret: string, siteKey: string, instanceHost: string, response: string | null | undefined): Promise<void> {

packages/backend/src/core/entities/MetaEntityService.ts

@@ -98,6 +98,8 @@ export class MetaEntityService {
 			recaptchaSiteKey: instance.recaptchaSiteKey,
 			enableTurnstile: instance.enableTurnstile,
 			turnstileSiteKey: instance.turnstileSiteKey,
+			enableFC: instance.enableFC,
+			fcSiteKey: instance.fcSiteKey,
 			swPublickey: instance.swPublicKey,
 			themeColor: instance.themeColor,
 			mascotImageUrl: instance.mascotImageUrl ?? '/assets/ai.png',

packages/backend/src/models/Meta.ts

@@ -269,6 +269,23 @@ export class MiMeta {
 	})
 	public turnstileSecretKey: string | null;
 
+	@Column('boolean', {
+		default: false,
+	})
+	public enableFC: boolean;
+
+	@Column('varchar', {
+		length: 1024,
+		nullable: true,
+	})
+	public fcSiteKey: string | null;
+
+	@Column('varchar', {
+		length: 1024,
+		nullable: true,
+	})
+	public fcSecretKey: string | null;
+
 	// chaptcha系を追加した際にはnodeinfoのレスポンスに追加するのを忘れないようにすること
 
 	@Column('enum', {

packages/backend/src/models/json-schema/meta.ts

@@ -127,6 +127,14 @@ export const packedMetaLiteSchema = {
 			type: 'string',
 			optional: false, nullable: true,
 		},
+		enableFC: {
+			type: 'boolean',
+			optional: false, nullable: false,
+		},
+		fcSiteKey: {
+			type: 'string',
+			optional: false, nullable: true,
+		},
 		enableAchievements: {
 			type: 'boolean',
 			optional: false, nullable: true,

packages/backend/src/server/NodeinfoServerService.ts

@@ -121,6 +121,7 @@ export class NodeinfoServerService {
 					enableRecaptcha: meta.enableRecaptcha,
 					enableMcaptcha: meta.enableMcaptcha,
 					enableTurnstile: meta.enableTurnstile,
+					enableFC: meta.enableFC,
 					maxNoteTextLength: this.config.maxNoteLength,
 					maxRemoteNoteTextLength: this.config.maxRemoteNoteLength,
 					maxCwLength: this.config.maxCwLength,

packages/backend/src/server/api/ApiServerService.ts

@@ -118,6 +118,7 @@ export class ApiServerService {
 				'hcaptcha-response'?: string;
 				'g-recaptcha-response'?: string;
 				'turnstile-response'?: string;
+				'frc-captcha-solution'?: string;
 			}
 		}>('/signup', (request, reply) => this.signupApiService.signup(request, reply));
 

packages/backend/src/server/api/SignupApiService.ts

@@ -72,6 +72,7 @@ export class SignupApiService {
 				'g-recaptcha-response'?: string;
 				'turnstile-response'?: string;
 				'm-captcha-response'?: string;
+				'frc-captcha-solution'?: string;
 			}
 		}>,
 		reply: FastifyReply,
@@ -104,6 +105,12 @@ export class SignupApiService {
 					throw new FastifyReplyError(400, err);
 				});
 			}
+
+			if (this.meta.enableFC && this.meta.fcSecretKey) {
+				await this.captchaService.verifyFriendlyCaptcha(this.meta.fcSecretKey, body['frc-captcha-solution']).catch(err => {
+					throw new FastifyReplyError(400, err);
+				});
+			}
 		}
 
 		const username = body['username'];

packages/backend/src/server/api/endpoints/admin/meta.ts

@@ -73,6 +73,14 @@ export const meta = {
 				type: 'string',
 				optional: false, nullable: true,
 			},
+			enableFC: {
+				type: 'boolean',
+				optional: false, nullable: false,
+			},
+			fcSiteKey: {
+				type: 'string',
+				optional: false, nullable: true,
+			},
 			swPublickey: {
 				type: 'string',
 				optional: false, nullable: true,
@@ -219,6 +227,10 @@ export const meta = {
 				type: 'string',
 				optional: false, nullable: true,
 			},
+			fcSecretKey: {
+				type: 'string',
+				optional: false, nullable: true,
+			},
 			sensitiveMediaDetection: {
 				type: 'string',
 				optional: false, nullable: false,
@@ -600,6 +612,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				recaptchaSiteKey: instance.recaptchaSiteKey,
 				enableTurnstile: instance.enableTurnstile,
 				turnstileSiteKey: instance.turnstileSiteKey,
+				enableFC: instance.enableFC,
+				fcSiteKey: instance.fcSiteKey,
 				swPublickey: instance.swPublicKey,
 				themeColor: instance.themeColor,
 				mascotImageUrl: instance.mascotImageUrl,
@@ -634,6 +648,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				mcaptchaSecretKey: instance.mcaptchaSecretKey,
 				recaptchaSecretKey: instance.recaptchaSecretKey,
 				turnstileSecretKey: instance.turnstileSecretKey,
+				fcSecretKey: instance.fcSecretKey,
 				sensitiveMediaDetection: instance.sensitiveMediaDetection,
 				sensitiveMediaDetectionSensitivity: instance.sensitiveMediaDetectionSensitivity,
 				setSensitiveFlagAutomatically: instance.setSensitiveFlagAutomatically,

packages/backend/src/server/api/endpoints/admin/update-meta.ts

@@ -81,6 +81,9 @@ export const paramDef = {
 		enableTurnstile: { type: 'boolean' },
 		turnstileSiteKey: { type: 'string', nullable: true },
 		turnstileSecretKey: { type: 'string', nullable: true },
+		enableFC: { type: 'boolean' },
+		fcSiteKey: { type: 'string', nullable: true },
+		fcSecretKey: { type: 'string', nullable: true },
 		sensitiveMediaDetection: { type: 'string', enum: ['none', 'all', 'local', 'remote'] },
 		sensitiveMediaDetectionSensitivity: { type: 'string', enum: ['medium', 'low', 'high', 'veryLow', 'veryHigh'] },
 		setSensitiveFlagAutomatically: { type: 'boolean' },
@@ -383,6 +386,18 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				set.turnstileSecretKey = ps.turnstileSecretKey;
 			}
 
+			if (ps.enableFC !== undefined) {
+				set.enableFC = ps.enableFC;
+			}
+
+			if (ps.fcSiteKey !== undefined) {
+				set.fcSiteKey = ps.fcSiteKey;
+			}
+
+			if (ps.fcSecretKey !== undefined) {
+				set.fcSecretKey = ps.fcSecretKey;
+			}
+
 			if (ps.enableBotTrending !== undefined) {
 				set.enableBotTrending = ps.enableBotTrending;
 			}

packages/backend/test/e2e/2fa.ts

@@ -123,12 +123,14 @@ describe('2要素認証', () => {
 		password: string,
 		'g-recaptcha-response'?: string | null,
 		'hcaptcha-response'?: string | null,
+		'frc-captcha-solution'?: string | null,
 	} => {
 		return {
 			username,
 			password,
 			'g-recaptcha-response': null,
 			'hcaptcha-response': null,
+			'frc-captcha-solution': null,
 		};
 	};