71 lines
2.0 KiB
TypeScript
71 lines
2.0 KiB
TypeScript
/*
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* Copyright (C) 2026 Fluxer Contributors
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*
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* This file is part of Fluxer.
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*
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* Fluxer is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Fluxer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
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*/
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import {timingSafeEqual} from 'node:crypto';
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import {UnauthorizedError} from '@fluxer/errors/src/domains/core/UnauthorizedError';
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import {matchesAnyExactOrNestedPath} from '@fluxer/hono/src/middleware/utils/PathMatchers';
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import type {MiddlewareHandler} from 'hono';
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export interface InternalAuthOptions {
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secret: string;
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skipPaths?: Array<string>;
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}
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function timingSafeCompare(a: string, b: string): boolean {
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const bufferA = Buffer.from(a);
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const bufferB = Buffer.from(b);
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if (bufferA.length !== bufferB.length) {
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return false;
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}
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return timingSafeEqual(bufferA, bufferB);
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}
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export function createInternalAuth(options: InternalAuthOptions): MiddlewareHandler {
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const {secret, skipPaths = ['/_health']} = options;
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return async (c, next) => {
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const path = c.req.path;
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if (matchesAnyExactOrNestedPath(path, skipPaths)) {
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await next();
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return;
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}
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const authHeader = c.req.header('Authorization');
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if (!authHeader) {
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throw new UnauthorizedError({message: 'Missing Authorization header'});
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}
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if (!authHeader.startsWith('Bearer ')) {
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throw new UnauthorizedError({message: 'Invalid Authorization header format'});
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}
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const token = authHeader.slice(7);
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if (!timingSafeCompare(token, secret)) {
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throw new UnauthorizedError({message: 'Invalid token'});
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}
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await next();
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};
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}
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