UNPKG

n8n

Version:

n8n Workflow Automation Tool

88 lines 4.21 kB
"use strict"; var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) { var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d; if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc); else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r; return c > 3 && r && Object.defineProperty(target, key, r), r; }; var __metadata = (this && this.__metadata) || function (k, v) { if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v); }; Object.defineProperty(exports, "__esModule", { value: true }); exports.SlackSignatureExtractor = void 0; const backend_common_1 = require("@n8n/backend-common"); const zod_1 = require("zod"); const decorators_1 = require("@n8n/decorators"); function isHeaderObject(obj) { return obj !== null && obj !== undefined && typeof obj === 'object' && !Array.isArray(obj); } let SlackSignatureExtractor = class SlackSignatureExtractor { constructor(logger) { this.logger = logger; this.hookDescription = { name: 'SlackSignatureExtractor', displayName: 'Slack Identity Extractor', options: [], }; } isApplicableToTriggerNode(nodeType) { return nodeType === 'n8n-nodes-base.webhook' || nodeType === 'webhook'; } async execute(options) { if (!options.triggerItems || options.triggerItems.length === 0) { this.logger.error('No trigger items found for Slack identity extraction'); throw new Error('No trigger items found for Slack identity extraction'); } const [triggerItem] = options.triggerItems; const headers = triggerItem.json['headers']; if (!isHeaderObject(headers)) { this.logger.error('No headers found in trigger item for Slack identity extraction'); throw new Error('No headers found in trigger item for Slack identity extraction'); } const timestamp = this.getHeader(headers, 'x-slack-request-timestamp'); const signature = this.getHeader(headers, 'x-slack-signature'); if (!timestamp) { this.logger.error('Missing X-Slack-Request-Timestamp header'); throw new Error('Missing X-Slack-Request-Timestamp header'); } if (!signature) { this.logger.error('Missing X-Slack-Signature header'); throw new Error('Missing X-Slack-Signature header'); } const rawBody = this.getRawBody(triggerItem); headers['x-slack-signature'] = '**********'; headers['x-slack-request-timestamp'] = '**********'; return { triggerItems: options.triggerItems, contextUpdate: { credentials: { identity: rawBody, version: 1, metadata: { source: 'slack-signature', timestamp, signature, }, }, }, }; } getHeader(headers, name) { const value = headers[name] ?? headers[name.toLowerCase()]; return typeof value === 'string' ? value : undefined; } getRawBody(triggerItem) { const result = zod_1.z.record(zod_1.z.string(), zod_1.z.string()).safeParse(triggerItem.json['body']); if (!result.success) { this.logger.error('Could not retrieve raw body for Slack signature verification'); throw new Error('Could not retrieve raw body for Slack signature verification.'); } return new URLSearchParams(result.data).toString(); } }; exports.SlackSignatureExtractor = SlackSignatureExtractor; exports.SlackSignatureExtractor = SlackSignatureExtractor = __decorate([ (0, decorators_1.ContextEstablishmentHook)(), __metadata("design:paramtypes", [backend_common_1.Logger]) ], SlackSignatureExtractor); //# sourceMappingURL=slack-signature-extractor.js.map