@aaaahoang123/nest-keycloak-connect
v1.9.5
Published
keycloak-nodejs-connect module for Nest
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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 @aaaahoang123/nest-keycloak-connect keycloak-connect
NPM
npm install @aaaahoang123/nest-keycloak-connect keycloak-connect --save
Getting Started
Module registration
Registering the module:
KeycloakConnectModule.register({
authServerUrl: 'http://localhost:8080', // might be http://localhost:8080/auth for older keycloak versions
realm: 'master',
clientId: 'my-nestjs-app',
secret: 'secret',
policyEnforcement: PolicyEnforcementMode.PERMISSIVE, // optional
tokenValidation: TokenValidation.ONLINE, // optional
})
Async registration is also available:
KeycloakConnectModule.registerAsync({
useExisting: KeycloakConfigService,
imports: [ConfigModule]
})
KeycloakConfigService
import { Injectable } from '@nestjs/common';
import { KeycloakConnectOptions, KeycloakConnectOptionsFactory, PolicyEnforcementMode, TokenValidation } from 'nest-keycloak-connect';
@Injectable()
export class KeycloakConfigService implements KeycloakConnectOptionsFactory {
createKeycloakConnectOptions(): KeycloakConnectOptions {
return {
authServerUrl: 'http://localhost:8080', // might be http://localhost:8080/auth for older keycloak versions
realm: 'master',
clientId: 'my-nestjs-app',
secret: 'secret',
policyEnforcement: PolicyEnforcementMode.PERMISSIVE,
tokenValidation: TokenValidation.ONLINE,
};
}
}
You can also register by just providing the keycloak.json
path and an optional module configuration:
KeycloakConnectModule.register(`./keycloak.json`, {
policyEnforcement: PolicyEnforcementMode.PERMISSIVE,
tokenValidation: TokenValidation.ONLINE,
})
Guards
Register any of the guards either globally, or scoped in your controller.
Global registration using APP_GUARD token
NOTE: These are in order, see https://docs.nestjs.com/guards#binding-guards for more information.
providers: [
{
provide: APP_GUARD,
useClass: AuthGuard,
},
{
provide: APP_GUARD,
useClass: ResourceGuard,
},
{
provide: APP_GUARD,
useClass: RoleGuard,
},
]
Scoped registration
@Controller('cats')
@UseGuards(AuthGuard, ResourceGuard)
export class CatsController {}
What does these providers do ?
AuthGuard
Adds an authentication guard, you can also have it scoped if you like (using regular @UseGuards(AuthGuard)
in your controllers). By default, it will throw a 401 unauthorized when it is unable to verify the JWT token or Bearer
header is missing.
ResourceGuard
Adds a resource guard, which is permissive by default (can be configured see options). 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.
RoleGuard
Adds a role guard, can only be used in conjunction with resource guard when enforcement policy is PERMISSIVE, unless you only use role guard exclusively.
Permissive by default. Used by controller methods annotated with @Roles
(matching can be configured)
Configuring controllers
In your controllers, simply do:
import { Resource, Roles, Scopes, 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()
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);
}
}
Decorators
Here is the decorators you can use in your controllers.
| Decorator | Description | |--------------------|-----------------------------------------------------------------------------------------------------------| | @AuthenticatedUser | Retrieves the current Keycloak logged-in user. (must be per method, unless controller is request scoped.) | | @EnforcerOptions | Keycloak enforcer options. | | @Public | Allow any user to use the route. | | @Resource | Keycloak application resource name. | | @Scope | Keycloak application scope name. | | @Roles | Keycloak realm/application roles. |
Multi tenant configuration
Setting up for multi-tenant is configured as an option in your configuration:
{
authServerUrl: 'http://localhost:8180/auth',
clientId: 'nest-api',
secret: 'fallback', // will be used as fallback when resolver returns null
multiTenant: {
realmResolver: (request) => {
return request.get('host').split('.')[0];
},
realmSecretResolver: (realm) => {
const secrets = { master: 'secret', slave: 'password' };
return secrets[realm];
}
}
}
Configuration options
Keycloak Options
For Keycloak options, refer to the official keycloak-connect library.
Nest Keycloak Options
| Option | Description | Required | Default | |-------------------|-------------------------------------------------------------------------------------|----------|--------------| | cookieKey | Cookie Key | no | KEYCLOAK_JWT | | logLevels | Built-in logger level (deprecated, will be removed in 2.0) | no | log | | useNestLogger | Use the nest logger (deprecated, will be removed in 2.0) | no | true | | policyEnforcement | Sets the policy enforcement mode | no | PERMISSIVE | | tokenValidation | Sets the token validation method | no | ONLINE | | multiTenant | Sets the options for multi-tenant configuration | no | - | | roleMerge | Sets the merge mode for @Role decorator | no | OVERRIDE |
Multi Tenant Options
| Option | Description | Required | Default | |---------------------|---------------------------------------------------------------------------------------------------------|----------|--------------| | resolveAlways | Option to always resolve the realm and secret. Disabled by default. | no | false | | realmResolver | A function that passes a request (from respective platform i.e express or fastify) and returns a string | yes | - | | realmSecretResolver | A function that passes the realm string and returns the secret string | yes | - |
Example app
An example application is provided in the source code with both Keycloak Realm and Postman requests for you to experiment with.