Nest Keycloak Connect

An adapter for keycloak-nodejs-connect.

Features

• Protect your resources using Keycloak's Authorization Services.
• Simply add @Resource, @Scopes, or @Roles in your controllers and you're good to go.
• Compatible with Fastify platform.

Installation

Yarn

yarn add nest-keycloak-connect keycloak-connect

NPM

npm install nest-keycloak-connect keycloak-connect --save

Getting Started

Register the module in app.module.ts

import { Module } from '@nestjs/common';
import { APP_GUARD } from '@nestjs/core';
import {
  KeycloakConnectModule,
  ResourceGuard,
  RoleGuard,
  AuthGuard,
  PolicyEnforcementMode,
  TokenValidation
} from 'nest-keycloak-connect';

@Module({
  imports: [
    KeycloakConnectModule.register({
      authServerUrl: 'http://localhost:8080/auth',
      realm: 'master',
      clientId: 'my-nestjs-app',
      secret: 'secret',
      // optional if you want to retrieve JWT from cookie
      cookieKey: 'KEYCLOAK_JWT', 
      // optional loglevels. default is verbose
      logLevels: ['warn'],
      // optional useNestLogger, uses the logger from app.useLogger() implementation
      useNestLogger: false,
      // optional, already defaults to permissive
      policyEnforcement: PolicyEnforcementMode.PERMISSIVE,
      // optional, already defaults to online validation
      tokenValidation: TokenValidation.ONLINE,
    }),
  ],
  providers: [
    // These are in order, see https://docs.nestjs.com/guards#binding-guards
    // for more information

    // This adds a global level authentication guard, you can also have it scoped
    // if you like.
    //
    // Will throw a 401 unauthorized when it is unable to
    // verify the JWT token or Bearer header is missing.
    {
      provide: APP_GUARD,
      useClass: AuthGuard,
    },
    // This adds a global level resource guard, which is permissive by default (can be configured).
    //
    // Only controllers annotated with `@Resource` and methods with `@Scopes`
    // are handled by this guard.
    //
    // NOTE: This guard is not necessary if you are using role-based authorization exclusively.
    //       You can use role guard exclusively for that.
    //
    {
      provide: APP_GUARD,
      useClass: ResourceGuard,
    },
    
    // This adds a global level role guard, can only be used in conjunction with resource guard
    // when enforcement policy is PERMISSIVE, unless you only use role guard exclusively.
    // This adds a global level role guard, which is permissive.
    //
    // Used by controller methods annotated with `@Roles` (matching can be configured)
    {
      provide: APP_GUARD,
      useClass: RoleGuard,
    },
  ],
})
export class AppModule {}

You can also register by just providing the keycloak.json path:

KeycloakConnectModule.register(`./keycloak.json`, {
  cookieKey: 'KEYCLOAK_JWT',
  logLevels: ['verbose'],
  useNestLogger: false,
  policyEnforcement: PolicyEnforcementMode.ENFORCING,
  tokenValidation: TokenValidation.NONE,
})

In your controllers, simply do:

import { Resource, Roles, Scopes, AllowAnyRole, Public, RoleMatchingMode } from 'nest-keycloak-connect';
import { Controller, Get, Delete, Put, Post, Param } from '@nestjs/common';
import { Product } from './product';
import { ProductService } from './product.service';

@Controller()
@Resource(Product.name)
export class ProductController {
  constructor(private service: ProductService) {}

  @Get()
  @Public() // Can also use `@Unprotected`
  async findAll() {
    return await this.service.findAll();
  }

  @Get()
  @Roles({ roles: ['admin', 'other'] })
  async findAllBarcodes() {
    return await this.service.findAllBarcodes();
  }

  @Get(':code')
  @Scopes('View')
  async findByCode(@Param('code') code: string) {
    return await this.service.findByCode(code);
  }

  @Post()
  @Scopes('Create')
  async create(@Body() product: Product) {
    return await this.service.create(product);
  }

  @Delete(':code')
  @Scopes('Delete')
  @Roles({ roles: ['admin', 'realm:sysadmin'], mode: RoleMatchingMode.ALL })
  async deleteByCode(@Param('code') code: string) {
    return await this.service.deleteByCode(code);
  }

  @Put(':code')
  @Scopes('Edit')
  async update(@Param('code') code: string, @Body() product: Product) {
    return await this.service.update(code, product);
  }
}

Example app

An example application is provided in the source code with both Keycloak Realm and Postman requests for you to experiment with.