mirror of
https://github.com/n8n-io/n8n.git
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458 lines
10 KiB
TypeScript
458 lines
10 KiB
TypeScript
import type {
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IDataObject,
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IExecuteFunctions,
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INodeExecutionData,
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INodeType,
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INodeTypeDescription,
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} from 'n8n-workflow';
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import { NodeOperationError } from 'n8n-workflow';
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import jwt from 'jsonwebtoken';
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import { formatPrivateKey } from '../../utils/utilities';
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import { parseJsonParameter } from '../Set/v2/helpers/utils';
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const prettifyOperation = (operation: string) => {
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if (operation === 'sign') {
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return 'Sign a JWT';
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}
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if (operation === 'decode') {
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return 'Decode a JWT';
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}
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if (operation === 'verify') {
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return 'Verify a JWT';
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}
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return operation;
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};
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const getToken = (ctx: IExecuteFunctions, itemIndex = 0) => {
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const token = ctx.getNodeParameter('token', itemIndex) as string;
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if (!token) {
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throw new NodeOperationError(ctx.getNode(), 'The JWT token was not provided', {
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itemIndex,
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description: "Be sure to add a valid JWT token to the 'Token' parameter",
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});
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}
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return token;
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};
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export class Jwt implements INodeType {
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description: INodeTypeDescription = {
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displayName: 'JWT',
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name: 'jwt',
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icon: 'file:jwt.svg',
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group: ['transform'],
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version: 1,
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description: 'JWT',
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subtitle: `={{(${prettifyOperation})($parameter.operation)}}`,
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defaults: {
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name: 'JWT',
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},
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inputs: ['main'],
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outputs: ['main'],
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credentials: [
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{
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// eslint-disable-next-line n8n-nodes-base/node-class-description-credentials-name-unsuffixed
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name: 'jwtAuth',
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required: true,
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},
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],
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properties: [
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{
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displayName: 'Operation',
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name: 'operation',
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type: 'options',
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noDataExpression: true,
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options: [
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{
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name: 'Decode',
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value: 'decode',
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action: 'Decode a JWT',
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},
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{
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name: 'Sign',
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value: 'sign',
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action: 'Sign a JWT',
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},
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{
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name: 'Verify',
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value: 'verify',
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action: 'Verify a JWT',
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},
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],
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default: 'sign',
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},
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{
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displayName: 'Use JSON to Build Payload',
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name: 'useJson',
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type: 'boolean',
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default: false,
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description: 'Whether to use JSON to build the claims',
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displayOptions: {
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show: {
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operation: ['sign'],
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},
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},
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},
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{
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displayName: 'Payload Claims',
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name: 'claims',
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type: 'collection',
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placeholder: 'Add Claim',
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default: {},
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options: [
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{
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displayName: 'Audience',
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name: 'audience',
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type: 'string',
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placeholder: 'e.g. https://example.com',
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default: '',
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description: 'Identifies the recipients that the JWT is intended for',
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},
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{
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displayName: 'Expires In',
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name: 'expiresIn',
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type: 'number',
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placeholder: 'e.g. 3600',
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default: 3600,
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description: 'The lifetime of the token in seconds',
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typeOptions: {
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minValue: 0,
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},
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},
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{
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displayName: 'Issuer',
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name: 'issuer',
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type: 'string',
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placeholder: 'e.g. https://example.com',
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default: '',
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description: 'Identifies the principal that issued the JWT',
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},
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{
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displayName: 'JWT ID',
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name: 'jwtid',
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type: 'string',
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placeholder: 'e.g. 123456',
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default: '',
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description: 'Unique identifier for the JWT',
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},
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{
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displayName: 'Not Before',
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name: 'notBefore',
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type: 'number',
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default: 0,
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description: 'The time before which the JWT must not be accepted for processing',
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typeOptions: {
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minValue: 0,
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},
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},
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{
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displayName: 'Subject',
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name: 'subject',
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type: 'string',
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default: '',
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description: 'Identifies the principal that is the subject of the JWT',
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},
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],
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displayOptions: {
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show: {
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operation: ['sign'],
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useJson: [false],
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},
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},
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},
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{
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displayName: 'Payload Claims (JSON)',
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name: 'claimsJson',
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type: 'json',
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description: 'Claims to add to the token in JSON format',
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default: '{\n "my_field_1": "value 1",\n "my_field_2": "value 2"\n}\n',
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validateType: 'object',
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ignoreValidationDuringExecution: true,
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typeOptions: {
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rows: 5,
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},
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displayOptions: {
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show: {
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operation: ['sign'],
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useJson: [true],
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},
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},
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},
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{
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displayName: 'Token',
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name: 'token',
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type: 'string',
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typeOptions: { password: true },
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required: true,
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validateType: 'jwt',
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default: '',
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description: 'The token to verify or decode',
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displayOptions: {
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show: {
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operation: ['verify', 'decode'],
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},
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},
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},
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{
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displayName: 'Options',
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name: 'options',
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type: 'collection',
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placeholder: 'Add Option',
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default: {},
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options: [
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{
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displayName: 'Return Additional Info',
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name: 'complete',
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type: 'boolean',
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default: false,
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description:
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'Whether to return the complete decoded token with information about the header and signature or just the payload',
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displayOptions: {
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show: {
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'/operation': ['verify', 'decode'],
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},
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},
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},
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{
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displayName: 'Ignore Expiration',
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name: 'ignoreExpiration',
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type: 'boolean',
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default: false,
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description: 'Whether to ignore the expiration of the token',
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displayOptions: {
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show: {
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'/operation': ['verify'],
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},
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},
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},
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{
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displayName: 'Ignore Not Before Claim',
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name: 'ignoreNotBefore',
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type: 'boolean',
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default: false,
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description: 'Whether to ignore the not before claim of the token',
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displayOptions: {
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show: {
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'/operation': ['verify'],
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},
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},
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},
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{
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displayName: 'Clock Tolerance',
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name: 'clockTolerance',
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type: 'number',
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default: 0,
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description:
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'Number of seconds to tolerate when checking the nbf and exp claims, to deal with small clock differences among different servers',
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typeOptions: {
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minValue: 0,
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},
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displayOptions: {
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show: {
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'/operation': ['verify'],
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},
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},
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},
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{
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displayName: 'Override Algorithm',
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name: 'algorithm',
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type: 'options',
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options: [
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{
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name: 'ES256',
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value: 'ES256',
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},
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{
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name: 'ES384',
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value: 'ES384',
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},
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{
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name: 'ES512',
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value: 'ES512',
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},
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{
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name: 'HS256',
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value: 'HS256',
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},
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{
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name: 'HS384',
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value: 'HS384',
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},
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{
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name: 'HS512',
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value: 'HS512',
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},
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{
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name: 'PS256',
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value: 'PS256',
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},
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{
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name: 'PS384',
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value: 'PS384',
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},
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{
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name: 'PS512',
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value: 'PS512',
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},
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{
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name: 'RS256',
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value: 'RS256',
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},
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{
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name: 'RS384',
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value: 'RS384',
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},
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{
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name: 'RS512',
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value: 'RS512',
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},
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],
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default: 'HS256',
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description:
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'The algorithm to use for signing or verifying the token, overrides algorithm in credentials',
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displayOptions: {
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show: {
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'/operation': ['sign', 'verify'],
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},
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},
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},
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],
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},
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],
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};
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async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
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const items = this.getInputData();
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const returnData: INodeExecutionData[] = [];
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const operation = this.getNodeParameter('operation', 0);
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const credentials = (await this.getCredentials('jwtAuth')) as {
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keyType: 'passphrase' | 'pemKey';
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publicKey: string;
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privateKey: string;
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secret: string;
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algorithm: jwt.Algorithm;
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};
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for (let itemIndex = 0; itemIndex < items.length; itemIndex++) {
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const options = this.getNodeParameter('options', itemIndex, {}) as {
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algorithm?: jwt.Algorithm;
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complete?: boolean;
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ignoreExpiration?: boolean;
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ignoreNotBefore?: boolean;
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clockTolerance?: number;
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};
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try {
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if (operation === 'sign') {
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const useJson = this.getNodeParameter('useJson', itemIndex) as boolean;
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let payload: IDataObject = {};
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if (useJson) {
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payload = parseJsonParameter(
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this.getNodeParameter('claimsJson', itemIndex) as IDataObject,
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this.getNode(),
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itemIndex,
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);
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} else {
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payload = this.getNodeParameter('claims', itemIndex) as IDataObject;
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}
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let secretOrPrivateKey;
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if (credentials.keyType === 'passphrase') {
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secretOrPrivateKey = credentials.secret;
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} else {
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secretOrPrivateKey = formatPrivateKey(credentials.privateKey);
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}
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const token = jwt.sign(payload, secretOrPrivateKey, {
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algorithm: options.algorithm ?? credentials.algorithm,
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});
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returnData.push({
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json: { token },
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pairedItem: itemIndex,
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});
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}
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if (operation === 'verify') {
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const token = getToken(this, itemIndex);
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let secretOrPublicKey;
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if (credentials.keyType === 'passphrase') {
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secretOrPublicKey = credentials.secret;
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} else {
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secretOrPublicKey = formatPrivateKey(credentials.publicKey, true);
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}
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const { ignoreExpiration, ignoreNotBefore, clockTolerance, complete } = options;
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const data = jwt.verify(token, secretOrPublicKey, {
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algorithms: [options.algorithm ?? credentials.algorithm],
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ignoreExpiration,
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ignoreNotBefore,
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clockTolerance,
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complete,
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});
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const json = options.complete && data ? (data as IDataObject) : { payload: data };
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returnData.push({
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json,
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pairedItem: itemIndex,
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});
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}
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if (operation === 'decode') {
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const token = getToken(this, itemIndex);
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const data = jwt.decode(token, { complete: options.complete });
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const json = options.complete && data ? (data as IDataObject) : { payload: data };
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returnData.push({
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json,
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pairedItem: itemIndex,
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});
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}
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} catch (error) {
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if (error.message === 'invalid signature') {
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error = new NodeOperationError(this.getNode(), "The JWT token can't be verified", {
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itemIndex,
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description:
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'Be sure that the provided JWT token is correctly encoded and matches the selected credentials',
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});
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}
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if (this.continueOnFail()) {
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returnData.push({
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json: this.getInputData(itemIndex)[0].json,
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error,
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pairedItem: itemIndex,
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});
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continue;
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}
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if (error.context) {
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error.context.itemIndex = itemIndex;
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throw error;
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}
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throw new NodeOperationError(this.getNode(), error, {
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itemIndex,
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});
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}
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}
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return [returnData];
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}
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}
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