diff --git a/packages/authorization/.npmrc b/packages/authorization/.npmrc new file mode 100644 index 000000000000..cafe685a112d --- /dev/null +++ b/packages/authorization/.npmrc @@ -0,0 +1 @@ +package-lock=true diff --git a/packages/authorization/LICENSE b/packages/authorization/LICENSE new file mode 100644 index 000000000000..af99ad048201 --- /dev/null +++ b/packages/authorization/LICENSE @@ -0,0 +1,25 @@ +Copyright (c) IBM Corp. 2018. All Rights Reserved. +Node module: @loopback/authorization +This project is licensed under the MIT License, full text below. + +-------- + +MIT license + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +THE SOFTWARE. diff --git a/packages/authorization/README.md b/packages/authorization/README.md new file mode 100644 index 000000000000..a7f225f9cca2 --- /dev/null +++ b/packages/authorization/README.md @@ -0,0 +1,118 @@ +# @loopback/authorization + +A LoopBack 4 component for authorization support. + +## Overview + +Authorization decides if a **subject** can perform specific **action** on an +**object**. + +![Authorization](authorization.png) + +### Role based + +### Permission based + +### Vote based + +### Key building blocks + +1. Decorate a method to describe: + +- Permission (maps the method to an action on the protected resource) + + - Type of the protected resource (such as `customer` or `order`) + - What action does the method represent (such as `changeEmail`, `createOrder`, + or `cancelOrder`) + +- ACL (provides role based rules) + + - allowedRoles + - deniedRoles + +- Voters (supplies a list of function to vote on the decision) + +2. Intercept a method invocation + +- Build authorization context + + - Subject (who) - from authentication + - Map principals to roles + - Inspect the target method for metadata - Permission, ACL, voters + +- Run through voters/enforcers to make decisions + +## Installation + +```shell +npm install --save @loopback/authorization +``` + +## Basic use + +Start by decorating your controller methods with `@authorize` to require the +request to be authorized. + +In this example, we make the user profile available via dependency injection +using a key available from `@loopback/authorization` package. + +```ts +import {inject} from '@loopback/context'; +import {authorize} from '@loopback/authorization'; +import {get} from '@loopback/rest'; + +export class MyController { + @authorize({allow: ['ADMIN']}) + @get('/number-of-views') + numOfViews(): number { + return 100; + } +} +``` + +## Extract common layer(TBD) + +`@loopback/authentication` and `@loopback/authorization` shares the client +information from the request. Therefore we need another module with +types/interfaces that describe the client, like `principles`, `userProfile`, +etc... A draft PR is created for this module: see branch +https://github.com/strongloop/loopback-next/tree/security/packages/security + +Since the common module is still in progress, as the first release of +`@loopback/authorization`, we have two choices to inject a user in the +interceptor: + +- `@loopback/authorization` requires `@loopback/authentication` as a dependency. + The interceptor injects the current user using + `AuthenticationBindings.CURRENT_USER`. Then we remove this dependency in the + common layer PR, two auth modules will depend on `@loopback/security`. + + - This is what's been done in my refactor PR, `Principle` and `UserProfile` + are still decoupled, I added a convertor function to turn a user profile + into a principle. + +- The interceptor injects the user using another key not related to + `@loopback/authentication`.(_Which means the code that injects the user stays + as it is in https://github.com/strongloop/loopback-next/pull/1205_). Then we + unify the user set and injection in the common layer PR: same as the 1st + choice, two auth modules will depend on `@loopback/security`. + +## Related resources + +## Contributions + +- [Guidelines](https://github.com/strongloop/loopback-next/blob/master/docs/CONTRIBUTING.md) +- [Join the team](https://github.com/strongloop/loopback-next/issues/110) + +## Tests + +run `npm test` from the root folder. + +## Contributors + +See +[all contributors](https://github.com/strongloop/loopback-next/graphs/contributors). + +## License + +MIT diff --git a/packages/authorization/authorization.png b/packages/authorization/authorization.png new file mode 100644 index 000000000000..64cc8a9c7a52 Binary files /dev/null and b/packages/authorization/authorization.png differ diff --git a/packages/authorization/fixtures/casbin/rbac_model.conf b/packages/authorization/fixtures/casbin/rbac_model.conf new file mode 100644 index 000000000000..71159e387d34 --- /dev/null +++ b/packages/authorization/fixtures/casbin/rbac_model.conf @@ -0,0 +1,14 @@ +[request_definition] +r = sub, obj, act + +[policy_definition] +p = sub, obj, act + +[role_definition] +g = _, _ + +[policy_effect] +e = some(where (p.eft == allow)) + +[matchers] +m = g(r.sub, p.sub) && r.obj == p.obj && r.act == p.act \ No newline at end of file diff --git a/packages/authorization/fixtures/casbin/rbac_policy.csv b/packages/authorization/fixtures/casbin/rbac_policy.csv new file mode 100644 index 000000000000..b6742e6bec1d --- /dev/null +++ b/packages/authorization/fixtures/casbin/rbac_policy.csv @@ -0,0 +1,7 @@ +p, bob, order, create +p, alice, order, create +p, customer_service, order, read +p, customer_service, order, create +p, customer_service, order, delete +p, customer_service, order, update +g, alice, customer_service diff --git a/packages/authorization/index.d.ts b/packages/authorization/index.d.ts new file mode 100644 index 000000000000..026b9d7c9ffc --- /dev/null +++ b/packages/authorization/index.d.ts @@ -0,0 +1,6 @@ +// Copyright IBM Corp. 2017,2018. All Rights Reserved. +// Node module: @loopback/authorization +// This file is licensed under the MIT License. +// License text available at https://opensource.org/licenses/MIT + +export * from './dist'; diff --git a/packages/authorization/index.js b/packages/authorization/index.js new file mode 100644 index 000000000000..28622def8c06 --- /dev/null +++ b/packages/authorization/index.js @@ -0,0 +1,6 @@ +// Copyright IBM Corp. 2017,2018. All Rights Reserved. +// Node module: @loopback/authorization +// This file is licensed under the MIT License. +// License text available at https://opensource.org/licenses/MIT + +module.exports = require('./dist'); diff --git a/packages/authorization/index.ts b/packages/authorization/index.ts new file mode 100644 index 000000000000..f81c156a7f3f --- /dev/null +++ b/packages/authorization/index.ts @@ -0,0 +1,8 @@ +// Copyright IBM Corp. 2017,2018. All Rights Reserved. +// Node module: @loopback/authorization +// This file is licensed under the MIT License. +// License text available at https://opensource.org/licenses/MIT + +// DO NOT EDIT THIS FILE +// Add any additional (re)exports to src/index.ts instead. +export * from './src'; diff --git a/packages/authorization/package-lock.json b/packages/authorization/package-lock.json new file mode 100644 index 000000000000..8bfc19f38887 --- /dev/null +++ b/packages/authorization/package-lock.json @@ -0,0 +1,2691 @@ +{ + "name": "@loopback/authorization", + "version": "1.0.0", + "lockfileVersion": 1, + "requires": true, + "dependencies": { + "@babel/code-frame": { + "version": "7.0.0", + "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.0.0.tgz", + "integrity": "sha512-OfC2uemaknXr87bdLUkWog7nYuliM9Ij5HUcajsVcMCpQrcLmtxRbVFTIqmcSkSeYRBFBRxs2FiUqFJDLdiebA==", + "dev": true, + "requires": { + "@babel/highlight": "^7.0.0" + } + }, + "@babel/core": { + "version": 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support.", + "engines": { + "node": ">=8.9" + }, + "scripts": { + "acceptance": "lb-mocha \"dist/__tests__/acceptance/**/*.js\"", + "build": "lb-tsc", + "clean": "lb-clean loopback-authorization*.tgz dist package *.tsbuildinfo", + "integration": "lb-mocha \"dist/__tests__/integration/**/*.js\"", + "prepublishOnly": "npm run build && npm run build:apidocs", + "pretest": "npm run build", + "test": "lb-mocha \"dist/__tests__/**/*.js\"", + "unit": "lb-mocha \"dist/__tests__/unit/**/*.js\"", + "verify": "npm pack && tar xf loopback-authorization*.tgz && tree package && npm run clean" + }, + "author": "IBM", + "copyright.owner": "IBM Corp.", + "license": "MIT", + "dependencies": { + "@loopback/context": "^1.20.2", + "@loopback/core": "^1.8.5", + "debug": "^4.1.1" + }, + "devDependencies": { + "@loopback/build": "^2.0.3", + "@loopback/testlab": "^1.6.3", + "@loopback/authentication": "^2.1.8", + "@types/debug": "^4.1.4", + "@types/node": "10.14.15", + "casbin": "^3.0.1" + }, + "keywords": [ + "LoopBack", + "Authorization" + ], + "files": [ + "README.md", + "index.js", + "index.d.ts", + "dist", + "src", + "!*/__tests__", + "!/fixtures" + ], + "repository": { + "type": "git", + "url": "https://github.com/strongloop/loopback-next.git" + } +} diff --git a/packages/authorization/src/__tests__/acceptance/authorization-casbin.acceptance.ts b/packages/authorization/src/__tests__/acceptance/authorization-casbin.acceptance.ts new file mode 100644 index 000000000000..766c0ccfedfb --- /dev/null +++ b/packages/authorization/src/__tests__/acceptance/authorization-casbin.acceptance.ts @@ -0,0 +1,170 @@ +// Copyright IBM Corp. 2019. All Rights Reserved. +// Node module: @loopback/authorization +// This file is licensed under the MIT License. +// License text available at https://opensource.org/licenses/MIT + +import {Context, inject, invokeMethod, Provider} from '@loopback/context'; +import {Application} from '@loopback/core'; +import {expect} from '@loopback/testlab'; +import * as casbin from 'casbin'; +import * as path from 'path'; +import { + AuthorizationComponent, + AuthorizationContext, + AuthorizationDecision, + AuthorizationMetadata, + AuthorizationRequest, + authorize, + Authorizer, +} from '../..'; +import {AuthorizationTags} from '../../keys'; +import {AuthenticationBindings, UserProfile} from '@loopback/authentication'; + +describe('Authorization', () => { + let app: Application; + let controller: OrderController; + let reqCtx: Context; + let events: string[]; + + before(givenApplicationAndAuthorizer); + beforeEach(() => givenRequestContext()); + + it('allows placeOrder for everyone', async () => { + const orderId = await invokeMethod(controller, 'placeOrder', reqCtx, [ + { + customerId: 'bob', + productId: 'product-a', + quantity: 10, + price: 320, + }, + ]); + expect(orderId).to.eql('order-1'); + expect(events).to.containEql('OrderController.prototype.placeOrder'); + }); + + it('allows cancelOrder for customer_service', async () => { + givenRequestContext({id: 'customer_service', name: 'customer_service'}); + const orderId = await controller.placeOrder({ + customerId: 'bob', + productId: 'product-a', + quantity: 10, + price: 320, + }); + const result = await invokeMethod(controller, 'cancelOrder', reqCtx, [ + orderId, + ]); + expect(result).to.be.true(); + expect(events).to.containEql('OrderController.prototype.cancelOrder'); + }); + + it('denies cancelOrder for bob', async () => { + givenRequestContext({id: 'bob', name: 'bob'}); + const orderId = await controller.placeOrder({ + customerId: 'bob', + productId: 'product-a', + quantity: 10, + price: 320, + }); + const result = invokeMethod(controller, 'cancelOrder', reqCtx, [orderId]); + await expect(result).to.be.rejectedWith('Access denied'); + expect(events).to.containEql('OrderController.prototype.cancelOrder'); + }); + + class Order { + id?: string; + customerId: string; + productId: string; + quantity: number; + price: number; + } + + class OrderController { + orders: Order[] = []; + + @authorize({ + resource: 'order', + scopes: ['create'], + }) + async placeOrder(order: Order) { + order.id = `order-${this.orders.length + 1}`; + this.orders.push(order); + return order.id; + } + + @authorize({ + resource: 'order', + scopes: ['delete'], + }) + async cancelOrder(orderId: string) { + const index = this.orders.findIndex(order => order.id === orderId); + if (index === -1) return false; + this.orders.splice(index, 1); + return true; + } + } + + function givenApplicationAndAuthorizer() { + app = new Application(); + app.component(AuthorizationComponent); + app.bind('casbin.enforcer').toDynamicValue(createEnforcer); + app + .bind('authorizationProviders.casbin-provider') + .toProvider(CasbinAuthorizationProvider) + .tag(AuthorizationTags.AUTHORIZER); + } + + function givenRequestContext( + user: UserProfile = {id: 'alice', name: 'alice'}, + ) { + events = []; + reqCtx = new Context(app); + reqCtx.bind(AuthenticationBindings.CURRENT_USER).to(user); + controller = new OrderController(); + } + + /** + * Provider of a function which authenticates + */ + class CasbinAuthorizationProvider implements Provider { + constructor(@inject('casbin.enforcer') private enforcer: casbin.Enforcer) {} + + /** + * @returns authenticateFn + */ + value(): Authorizer { + return this.authorize.bind(this); + } + + async authorize( + authorizationCtx: AuthorizationContext, + metadata: AuthorizationMetadata, + ) { + events.push(authorizationCtx.resource); + const request: AuthorizationRequest = { + subject: authorizationCtx.principals[0].name, + object: metadata.resource || authorizationCtx.resource, + action: (metadata.scopes && metadata.scopes[0]) || 'execute', + }; + const allow = await this.enforcer.enforce( + request.subject, + request.object, + request.action, + ); + if (allow) return AuthorizationDecision.ALLOW; + else if (allow === false) return AuthorizationDecision.DENY; + return AuthorizationDecision.ABSTAIN; + } + } + + async function createEnforcer() { + const conf = path.resolve( + __dirname, + '../../../fixtures/casbin/rbac_model.conf', + ); + const policy = path.resolve( + __dirname, + '../../../fixtures/casbin/rbac_policy.csv', + ); + return casbin.newEnforcer(conf, policy); + } +}); diff --git a/packages/authorization/src/__tests__/acceptance/authorization.acceptance.ts b/packages/authorization/src/__tests__/acceptance/authorization.acceptance.ts new file mode 100644 index 000000000000..b77d9ea4788d --- /dev/null +++ b/packages/authorization/src/__tests__/acceptance/authorization.acceptance.ts @@ -0,0 +1,121 @@ +// Copyright IBM Corp. 2019. All Rights Reserved. +// Node module: @loopback/authorization +// This file is licensed under the MIT License. +// License text available at https://opensource.org/licenses/MIT + +import {Context, invokeMethod, Provider} from '@loopback/context'; +import {Application} from '@loopback/core'; +import {expect} from '@loopback/testlab'; +import { + AuthorizationComponent, + AuthorizationContext, + AuthorizationDecision, + AuthorizationMetadata, + authorize, + Authorizer, + EVERYONE, +} from '../..'; +import {AuthorizationTags} from '../../keys'; +import {AuthenticationBindings} from '@loopback/authentication'; + +describe('Authorization', () => { + let app: Application; + let controller: OrderController; + let reqCtx: Context; + let events: string[]; + + before(givenApplicationAndAuthorizer); + beforeEach(givenRequestContext); + + it('allows placeOrder for everyone', async () => { + const orderId = await invokeMethod(controller, 'placeOrder', reqCtx, [ + { + customerId: 'customer-01', + productId: 'product-a', + quantity: 10, + price: 320, + }, + ]); + expect(orderId).to.eql('order-1'); + expect(events).to.containEql('OrderController.prototype.placeOrder'); + }); + + it('denies cancelOrder for regular user', async () => { + const result = invokeMethod(controller, 'cancelOrder', reqCtx, [ + 'order-01', + ]); + await expect(result).to.be.rejectedWith('Access denied'); + expect(events).to.containEql('OrderController.prototype.cancelOrder'); + }); + + class Order { + id?: string; + customerId: string; + productId: string; + quantity: number; + price: number; + } + + class OrderController { + orders: Order[] = []; + + @authorize({allowedRoles: [EVERYONE], scopes: ['order.create']}) + async placeOrder(order: Order) { + order.id = `order-${this.orders.length + 1}`; + this.orders.push(order); + return order.id; + } + + @authorize({allowedRoles: ['customer-service'], scopes: ['order.delete']}) + async cancelOrder(orderId: string) { + const index = this.orders.findIndex(order => order.id === orderId); + if (index === -1) return false; + this.orders.splice(index, 1); + return true; + } + } + + function givenApplicationAndAuthorizer() { + app = new Application(); + app.component(AuthorizationComponent); + app + .bind('authorizationProviders.my-provider') + .toProvider(MyAuthorizationProvider) + .tag(AuthorizationTags.AUTHORIZER); + } + + function givenRequestContext() { + events = []; + reqCtx = new Context(app); + reqCtx + .bind(AuthenticationBindings.CURRENT_USER) + .to({id: 'user-01', name: 'user-01'}); + controller = new OrderController(); + } + + /** + * Provider of a function which authenticates + */ + class MyAuthorizationProvider implements Provider { + /** + * @returns authenticateFn + */ + value(): Authorizer { + return this.authorize.bind(this); + } + + async authorize( + context: AuthorizationContext, + metadata: AuthorizationMetadata, + ) { + events.push(context.resource); + if ( + context.resource === 'OrderController.prototype.cancelOrder' && + context.principals[0].name === 'user-01' + ) { + return AuthorizationDecision.DENY; + } + return AuthorizationDecision.ALLOW; + } + } +}); diff --git a/packages/authorization/src/__tests__/unit/authorize-decorator.test.ts b/packages/authorization/src/__tests__/unit/authorize-decorator.test.ts new file mode 100644 index 000000000000..72386abf3434 --- /dev/null +++ b/packages/authorization/src/__tests__/unit/authorize-decorator.test.ts @@ -0,0 +1,180 @@ +// Copyright IBM Corp. 2019. All Rights Reserved. +// Node module: @loopback/authorization +// This file is licensed under the MIT License. +// License text available at https://opensource.org/licenses/MIT + +import {expect} from '@loopback/testlab'; +import { + AUTHENTICATED, + authorize, + EVERYONE, + getAuthorizationMetadata, + UNAUTHENTICATED, +} from '../..'; + +describe('Authentication', () => { + describe('@authorize decorator', () => { + it('can add authorize metadata to target method', () => { + class TestClass { + @authorize({allowedRoles: ['ADMIN'], scopes: ['secret.read']}) + getSecret() {} + + @authorize({allowedRoles: ['OWNER'], scopes: ['data.update']}) + update() {} + } + + let metaData = getAuthorizationMetadata(TestClass, 'getSecret'); + expect(metaData).to.eql({ + allowedRoles: ['ADMIN'], + scopes: ['secret.read'], + }); + + metaData = getAuthorizationMetadata(TestClass, 'update'); + expect(metaData).to.eql({ + allowedRoles: ['OWNER'], + scopes: ['data.update'], + }); + }); + + it('can add authorize metadata to target class', () => { + @authorize({allowedRoles: ['ADMIN'], scopes: ['secret.read']}) + class TestClass { + getSecret() {} + + @authorize({allowedRoles: ['OWNER'], scopes: ['data.update']}) + update() {} + } + + let metaData = getAuthorizationMetadata(TestClass, 'getSecret'); + expect(metaData).to.eql({ + allowedRoles: ['ADMIN'], + scopes: ['secret.read'], + }); + + metaData = getAuthorizationMetadata(TestClass, 'update'); + expect(metaData).to.eql({ + allowedRoles: ['OWNER'], + scopes: ['data.update'], + }); + }); + + it('honors method level decoration over class level', () => { + @authorize({allowedRoles: ['ADMIN'], scopes: ['secret']}) + class TestClass { + @authorize({allowedRoles: ['ADMIN'], scopes: ['secret.read']}) + getSecret() {} + + @authorize({allowedRoles: ['OWNER'], scopes: ['data.update']}) + update() {} + } + + let metaData = getAuthorizationMetadata(TestClass, 'getSecret'); + expect(metaData).to.eql({ + allowedRoles: ['ADMIN'], + scopes: ['secret.read'], + }); + + metaData = getAuthorizationMetadata(TestClass, 'update'); + expect(metaData).to.eql({ + allowedRoles: ['OWNER'], + scopes: ['data.update'], + }); + }); + + it('can add allowAll to target method', () => { + class TestClass { + @authorize.allowAll() + getSecret() {} + } + + const metaData = getAuthorizationMetadata(TestClass, 'getSecret'); + expect(metaData).to.eql({ + allowedRoles: [EVERYONE], + }); + }); + + it('can add allowAllExcept to target method', () => { + class TestClass { + @authorize.allowAllExcept('xyz') + getSecret() {} + } + + const metaData = getAuthorizationMetadata(TestClass, 'getSecret'); + expect(metaData).to.eql({ + allowedRoles: [EVERYONE], + deniedRoles: ['xyz'], + }); + }); + + it('can add denyAll to target method', () => { + class TestClass { + @authorize.denyAll() + getSecret() {} + } + + const metaData = getAuthorizationMetadata(TestClass, 'getSecret'); + expect(metaData).to.eql({ + deniedRoles: [EVERYONE], + }); + }); + + it('can add denyAllExcept to target method', () => { + class TestClass { + @authorize.denyAllExcept('xyz') + getSecret() {} + } + + const metaData = getAuthorizationMetadata(TestClass, 'getSecret'); + expect(metaData).to.eql({ + allowedRoles: ['xyz'], + deniedRoles: [EVERYONE], + }); + }); + + it('can add allowAuthenticated to target method', () => { + class TestClass { + @authorize.allowAuthenticated() + getSecret() {} + } + + const metaData = getAuthorizationMetadata(TestClass, 'getSecret'); + expect(metaData).to.eql({ + allowedRoles: [AUTHENTICATED], + }); + }); + + it('can add denyUnauthenticated to target method', () => { + class TestClass { + @authorize.denyUnauthenticated() + getSecret() {} + } + + const metaData = getAuthorizationMetadata(TestClass, 'getSecret'); + expect(metaData).to.eql({ + deniedRoles: [UNAUTHENTICATED], + }); + }); + + it('can stack decorators to target method', () => { + class TestClass { + @authorize.allow('a1', 'a2') + @authorize.deny('d1', 'd2') + @authorize({ + allowedRoles: ['a1', 'a3'], + deniedRoles: ['d3'], + }) + @authorize.scope('s1', 's2') + @authorize.vote('v1', 'v2') + getSecret() {} + } + + const metaData = getAuthorizationMetadata(TestClass, 'getSecret'); + expect(metaData).to.deepEqual({ + voters: ['v1', 'v2'], + allowedRoles: ['a1', 'a3', 'a2'], + deniedRoles: ['d3', 'd1', 'd2'], + scopes: ['s1', 's2'], + }); + }); + }); +}); diff --git a/packages/authorization/src/authorization-component.ts b/packages/authorization/src/authorization-component.ts new file mode 100644 index 000000000000..7ff43c3af9f2 --- /dev/null +++ b/packages/authorization/src/authorization-component.ts @@ -0,0 +1,11 @@ +// Copyright IBM Corp. 2018. All Rights Reserved. +// Node module: @loopback/authorization +// This file is licensed under the MIT License. +// License text available at https://opensource.org/licenses/MIT + +import {Component, createBindingFromClass} from '@loopback/core'; +import {AuthorizationInterceptor} from './authorize-interceptor'; + +export class AuthorizationComponent implements Component { + bindings = [createBindingFromClass(AuthorizationInterceptor)]; +} diff --git a/packages/authorization/src/authorize-interceptor.ts b/packages/authorization/src/authorize-interceptor.ts new file mode 100644 index 000000000000..54889ca4afaa --- /dev/null +++ b/packages/authorization/src/authorize-interceptor.ts @@ -0,0 +1,121 @@ +// Copyright IBM Corp. 2019. All Rights Reserved. +// Node module: @loopback/authorization +// This file is licensed under the MIT License. +// License text available at https://opensource.org/licenses/MIT + +import { + asGlobalInterceptor, + bind, + BindingAddress, + Context, + filterByTag, + inject, + Interceptor, + InvocationContext, + Next, + Provider, +} from '@loopback/context'; +import * as debugFactory from 'debug'; +import {getAuthorizationMetadata} from './decorators/authorize'; +import {AuthorizationTags} from './keys'; +import { + AuthorizationContext, + AuthorizationDecision, + Authorizer, + AuthorizationError, + Principal, +} from './types'; +import {AuthenticationBindings, UserProfile} from '@loopback/authentication'; + +const debug = debugFactory('loopback:authorization:interceptor'); + +@bind(asGlobalInterceptor('authorization')) +export class AuthorizationInterceptor implements Provider { + constructor( + @inject(filterByTag(AuthorizationTags.AUTHORIZER)) + private authorizers: Authorizer[], + ) {} + + value(): Interceptor { + return this.intercept.bind(this); + } + + async intercept(invocationCtx: InvocationContext, next: Next) { + const description = debug.enabled ? invocationCtx.description : ''; + const metadata = getAuthorizationMetadata( + invocationCtx.target, + invocationCtx.methodName, + ); + if (!metadata) { + debug('No authorization metadata is found %s', description); + const result = await next(); + return result; + } + debug('Authorization metadata for %s', description, metadata); + + // retrieve it from authentication module + const user = await invocationCtx.get( + AuthenticationBindings.CURRENT_USER, + { + optional: true, + }, + ); + + debug('Current user', user); + + const authorizationCtx: AuthorizationContext = { + principals: user ? [userToPrinciple(user)] : [], + roles: [], + scopes: [], + resource: invocationCtx.targetName, + invocationContext: invocationCtx, + }; + + debug('Security context for %s', description, authorizationCtx); + let authorizers = await loadAuthorizers( + invocationCtx, + metadata.voters || [], + ); + + authorizers = authorizers.concat(this.authorizers); + for (const fn of authorizers) { + const decision = await fn(authorizationCtx, metadata); + // we can add another interceptor to process the error + if (decision === AuthorizationDecision.DENY) { + const error = new AuthorizationError('Access denied'); + error.statusCode = 401; + throw error; + } + } + return next(); + } +} + +async function loadAuthorizers( + ctx: Context, + authorizers: (Authorizer | BindingAddress)[], +) { + const authorizerFunctions: Authorizer[] = []; + const bindings = ctx.findByTag(AuthorizationTags.AUTHORIZER); + authorizers = authorizers.concat(bindings.map(b => b.key)); + for (const keyOrFn of authorizers) { + if (typeof keyOrFn === 'function') { + authorizerFunctions.push(keyOrFn); + } else { + const fn = await ctx.get(keyOrFn); + authorizerFunctions.push(fn); + } + } + return authorizerFunctions; +} + +// This is a workaround before we extract a common layer +// for authentication and authorization. +function userToPrinciple(user: UserProfile): Principal { + return { + name: user.name || user.id, + id: user.id, + email: user.email, + type: 'USER', + }; +} diff --git a/packages/authorization/src/decorators/authorize.ts b/packages/authorization/src/decorators/authorize.ts new file mode 100644 index 000000000000..9254ce089f8c --- /dev/null +++ b/packages/authorization/src/decorators/authorize.ts @@ -0,0 +1,222 @@ +// Copyright IBM Corp. 2019. All Rights Reserved. +// Node module: @loopback/authorization +// This file is licensed under the MIT License. +// License text available at https://opensource.org/licenses/MIT + +import { + BindingAddress, + ClassDecoratorFactory, + DecoratorFactory, + MetadataAccessor, + MetadataInspector, + MetadataMap, + MethodDecoratorFactory, +} from '@loopback/context'; +import { + AUTHENTICATED, + AuthorizationMetadata, + Authorizer, + EVERYONE, + UNAUTHENTICATED, +} from '../types'; + +export const AUTHORIZATION_METHOD_KEY = MetadataAccessor.create< + AuthorizationMetadata, + MethodDecorator +>('authorization:method'); + +export const AUTHORIZATION_CLASS_KEY = MetadataAccessor.create< + AuthorizationMetadata, + ClassDecorator +>('authorization:class'); + +class AuthorizeClassDecoratorFactory extends ClassDecoratorFactory< + AuthorizationMetadata +> {} + +export class AuthorizeMethodDecoratorFactory extends MethodDecoratorFactory< + AuthorizationMetadata +> { + protected mergeWithOwn( + ownMetadata: MetadataMap, + target: Object, + methodName?: string, + // eslint-disable-next-line @typescript-eslint/no-explicit-any + methodDescriptor?: TypedPropertyDescriptor | number, + ) { + ownMetadata = ownMetadata || {}; + let methodMeta = ownMetadata[methodName!]; + if (!methodMeta) { + methodMeta = {}; + ownMetadata[methodName!] = methodMeta; + } + if (this.spec.allowedRoles) { + methodMeta.allowedRoles = this.merge( + methodMeta.allowedRoles, + this.spec.allowedRoles, + ); + } + if (this.spec.deniedRoles) { + methodMeta.deniedRoles = this.merge( + methodMeta.deniedRoles, + this.spec.deniedRoles, + ); + } + if (this.spec.scopes) { + methodMeta.scopes = this.merge(methodMeta.scopes, this.spec.scopes); + } + if (this.spec.voters) { + methodMeta.voters = this.merge(methodMeta.voters, this.spec.voters); + } + + if (this.spec.resource) { + methodMeta.resource = this.spec.resource; + } + + return ownMetadata; + } + + private merge(src?: T[], target?: T[]): T[] { + const list: T[] = []; + const set = new Set(src || []); + if (target) { + for (const i of target) { + set.add(i); + } + } + for (const i of set.values()) list.push(i); + return list; + } +} +/** + * Decorator `@authorize` to mark methods that require authorization + * + * @param spec Authorization metadata + */ +export function authorize(spec: AuthorizationMetadata) { + return function authorizeDecoratorForClassOrMethod( + // Class or a prototype + // eslint-disable-next-line @typescript-eslint/no-explicit-any + target: any, + method?: string, + // Use `any` to for `TypedPropertyDescriptor` + // See https://github.com/strongloop/loopback-next/pull/2704 + // eslint-disable-next-line @typescript-eslint/no-explicit-any + methodDescriptor?: TypedPropertyDescriptor, + ) { + if (method && methodDescriptor) { + // Method + return AuthorizeMethodDecoratorFactory.createDecorator( + AUTHORIZATION_METHOD_KEY, + spec, + )(target, method, methodDescriptor!); + } + if (typeof target === 'function' && !method && !methodDescriptor) { + // Class + return AuthorizeClassDecoratorFactory.createDecorator( + AUTHORIZATION_CLASS_KEY, + spec, + )(target); + } + // Not on a class or method + throw new Error( + '@intercept cannot be used on a property: ' + + DecoratorFactory.getTargetName(target, method, methodDescriptor), + ); + }; +} + +export namespace authorize { + /** + * Shortcut to configure allowed roles + * @param roles + */ + export const allow = (...roles: string[]) => authorize({allowedRoles: roles}); + /** + * Shortcut to configure denied roles + * @param roles + */ + export const deny = (...roles: string[]) => authorize({deniedRoles: roles}); + /** + * Shortcut to specify access scopes + * @param scopes + */ + export const scope = (...scopes: string[]) => authorize({scopes}); + + /** + * Shortcut to configure voters + * @param voters + */ + export const vote = ( + ...voters: (Authorizer | BindingAddress)[] + ) => authorize({voters}); + + /** + * Allows all + */ + export const allowAll = () => allow(EVERYONE); + + /** + * Allow all but the given roles + * @param roles + */ + export const allowAllExcept = (...roles: string[]) => + authorize({ + deniedRoles: roles, + allowedRoles: [EVERYONE], + }); + + /** + * Deny all + */ + export const denyAll = () => deny(EVERYONE); + + /** + * Deny all but the given roles + * @param roles + */ + export const denyAllExcept = (...roles: string[]) => + authorize({ + allowedRoles: roles, + deniedRoles: [EVERYONE], + }); + + /** + * Allow authenticated users + */ + export const allowAuthenticated = () => allow(AUTHENTICATED); + /** + * Deny unauthenticated users + */ + export const denyUnauthenticated = () => deny(UNAUTHENTICATED); +} + +/** + * Fetch authorization metadata stored by `@authorize` decorator. + * + * @param target Target object/class + * @param methodName Target method + */ +export function getAuthorizationMetadata( + target: object, + methodName: string, +): AuthorizationMetadata | undefined { + let targetClass: Function; + if (typeof target === 'function') { + targetClass = target; + target = target.prototype; + } else { + targetClass = target.constructor; + } + const metadata = MetadataInspector.getMethodMetadata( + AUTHORIZATION_METHOD_KEY, + target, + methodName, + ); + if (metadata) return metadata; + // Check if the class level has `@authorize` + return MetadataInspector.getClassMetadata( + AUTHORIZATION_CLASS_KEY, + targetClass, + ); +} diff --git a/packages/authorization/src/index.ts b/packages/authorization/src/index.ts new file mode 100644 index 000000000000..7c1bead268cd --- /dev/null +++ b/packages/authorization/src/index.ts @@ -0,0 +1,10 @@ +// Copyright IBM Corp. 2018. All Rights Reserved. +// Node module: @loopback/authorization +// This file is licensed under the MIT License. +// License text available at https://opensource.org/licenses/MIT + +export * from './authorization-component'; +export * from './authorize-interceptor'; +export * from './decorators/authorize'; +export * from './keys'; +export * from './types'; diff --git a/packages/authorization/src/keys.ts b/packages/authorization/src/keys.ts new file mode 100644 index 000000000000..3de0b5b3a8a6 --- /dev/null +++ b/packages/authorization/src/keys.ts @@ -0,0 +1,21 @@ +// Copyright IBM Corp. 2018. All Rights Reserved. +// Node module: @loopback/authorization +// This file is licensed under the MIT License. +// License text available at https://opensource.org/licenses/MIT + +/** + * Binding keys used by authorization component. + */ +export namespace AuthorizationBindings { + export const METADATA = 'authorization.operationMetadata'; +} + +/** + * Binding tags used by authorization component + */ +export namespace AuthorizationTags { + /** + * A tag for authorizers + */ + export const AUTHORIZER = 'authorizer'; +} diff --git a/packages/authorization/src/types.ts b/packages/authorization/src/types.ts new file mode 100644 index 000000000000..fdb7aec1b497 --- /dev/null +++ b/packages/authorization/src/types.ts @@ -0,0 +1,254 @@ +// Copyright IBM Corp. 2018. All Rights Reserved. +// Node module: @loopback/authorization +// This file is licensed under the MIT License. +// License text available at https://opensource.org/licenses/MIT + +import {BindingAddress, InvocationContext} from '@loopback/context'; + +/** + * Built-in roles + */ +export const EVERYONE = '$everyone'; +export const AUTHENTICATED = '$authenticated'; +export const UNAUTHENTICATED = '$unauthenticated'; +export const ANONYMOUS = '$anonymous'; + +/** + * Decisions for authorization + */ +export enum AuthorizationDecision { + /** + * Access allowed + */ + ALLOW = 'Allow', + /** + * Access denied + */ + DENY = 'Deny', + /** + * No decision + */ + ABSTAIN = 'Abstain', +} + +/** + * Authorization metadata supplied via `@authorize` decorator + */ +export interface AuthorizationMetadata { + /** + * Roles that are allowed access + */ + allowedRoles?: string[]; + /** + * Roles that are denied access + */ + deniedRoles?: string[]; + + /** + * Voters that help make the authorization decision + */ + voters?: (Authorizer | BindingAddress)[]; + + /** + * Name of the resource, default to the method name + */ + resource?: string; + /** + * Define the access scopes + */ + scopes?: string[]; +} + +/** + * Represent a user, an application, or a device + */ +export interface Principal { + /** + * Name/id + */ + name: string; + /** + * Type - user/application/device etc + */ + type: string; + + // organization/realm/domain/tenant + // team/group + + // eslint-disable-next-line @typescript-eslint/no-explicit-any + [attribute: string]: any; +} + +/** + * Represent a group of principals that have the same authority. There are two + * types of roles: + * + * - explicit + * - implicit + * + */ +export interface Role { + /** + * Name/id + */ + name: string; + // eslint-disable-next-line @typescript-eslint/no-explicit-any + [attribute: string]: any; +} + +/** + * `Subject` represents both security state and operations for a single + * application user. + * + * Such operations include: + * - authentication (login) + * - authorization (access control) + * - session access + * - logout + */ +export interface Subject { + principals: Principal[]; + roles: Role[]; + scopes: string[]; +} + +/** + * `Permission` defines an action/access against a protected resource. It's + * the `what` for authorization. + * + * There are three levels of permissions + * + * - Resource level (Order, User) + * - Instance level (Order-0001, User-1001) + * - Property level (User-0001.email) + * + * @example + * - create a user + * - read email of a user + * - change email of a user + * - cancel an order + */ +export interface Permission { + /** + * Action or access of a protected resources, such as `read`, `create`, + * `update`, or `delete` + */ + action: string; + + /** + * Type of protected resource, such as `Order` or `Customer` + */ + resourceType: string; + /** + * Identity of a protected resource instance, such as `order-0001` or + * `customer-101` + */ + resourceInstance?: string; + /** + * Property of a protected resource type/instance, such as `email` + */ + resourceProperty?: string; +} + +/** + * Request context for authorization + */ +export interface AuthorizationContext { + /** + * An array of principals identified for the request - it should come from + * authentication + */ + principals: Principal[]; + /** + * An array of roles for principals + */ + roles: Role[]; + /** + * An array of scopes representing granted permissions - usually come from + * access tokens + */ + scopes: string[]; + /** + * An name for the target resource to be accessed, such as + * `OrderController.prototype.cancelOrder` + */ + resource: string; + + /** + * Context for the invocation + */ + invocationContext: InvocationContext; +} + +/** + * A function to decide if access to the target should be allowed or denied + */ +export type Authorizer< + T extends AuthorizationMetadata = AuthorizationMetadata +> = + /** + * @param context: Context information for authorization + * @param metadata: Metadata representing requirements for authorization + */ + ( + context: AuthorizationContext, + metadata: T, + ) => Promise; + +/** + * Inspired by https://github.com/casbin/node-casbin + */ +export interface AuthorizationRequest { + /** + * The domain (realm/tenant) + */ + domain?: string; + /** + * The requestor that wants to access a resource. + */ + subject: string; + /** + * The resource that is going to be accessed. + */ + object: string; + /** + * The operation that the requestor performs on the resource. + */ + action: string; +} + +/** + * An enforcer of authorization policies + */ +export interface Enforcer { + /** + * Extract the request from authorization context + * @param authorizationContext + */ + buildRequest( + authorizationContext: AuthorizationContext, + ): Promise; + + /** + * Decide if the request can be granted access + * @param request + */ + enforce(request: AuthorizationRequest): Promise; +} + +/** + * The custom error class that describes the error thrown by + * the authorization module. + * Should be extracted to the common layer shared by authentication + * and authorization. + */ +export class AuthorizationError extends Error { + /** + * Machine readable code, can be understood by any clients + */ + code?: string; + /** + * The status code for HTTP requests + */ + statusCode?: number; +} diff --git a/packages/authorization/tsconfig.build.json b/packages/authorization/tsconfig.build.json new file mode 100644 index 000000000000..ad0770b33b6d --- /dev/null +++ b/packages/authorization/tsconfig.build.json @@ -0,0 +1,10 @@ +{ + "$schema": "http://json.schemastore.org/tsconfig", + "extends": "@loopback/build/config/tsconfig.common.json", + "compilerOptions": { + "outDir": "dist", + "rootDir": "src" + }, + "include": ["src"] +} +