feat: 2FAのバックアップコードの実装 (#121)

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

@@ -155,6 +155,13 @@ export class SigninApiService {
 				});
 			}
 
+			if (profile.twoFactorBackupSecret?.includes(token)) {
+				await this.userProfilesRepository.update({ userId: profile.userId }, {
+					twoFactorBackupSecret: profile.twoFactorBackupSecret.filter((secret) => secret !== token),
+				});
+				return this.signinService.signin(request, reply, user);
+			}
+
 			const delta = OTPAuth.TOTP.validate({
 				secret: OTPAuth.Secret.fromBase32(profile.twoFactorSecret!),
 				digits: 6,

packages/backend/src/server/api/endpoints/i/2fa/done.ts

@@ -54,8 +54,13 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 				throw new Error('not verified');
 			}
 
+			const backupCodes = Array.from({ length: 20 }, () => {
+				return new OTPAuth.Secret().base32;
+			});
+
 			await this.userProfilesRepository.update(me.id, {
 				twoFactorSecret: profile.twoFactorTempSecret,
+				twoFactorBackupSecret: backupCodes,
 				twoFactorEnabled: true,
 			});
 
@@ -64,6 +69,10 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 				detail: true,
 				includeSecrets: true,
 			}));
+
+			return {
+				backupCodes: backupCodes,
+			};
 		});
 	}
 }

packages/backend/src/server/api/endpoints/i/2fa/unregister.ts

@@ -42,6 +42,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 
 			await this.userProfilesRepository.update(me.id, {
 				twoFactorSecret: null,
+				twoFactorBackupSecret: null,
 				twoFactorEnabled: false,
 				usePasswordLessLogin: false,
 			});