feat(apigateway): DomainName supports SecurityPolicy (#6374)

* Pass securityPolicy from API Gateway DomainName to cfnDomainName

* Update ApiGateway README with example securityPolicy

* DomainName: Add documentation for SecurityPolicy TSL versions, add test for absent securityPolicy

* fix tsdoc @default

Co-authored-by: Void-Concept <49216983+Void-Concept@users.noreply.github.com>
Co-authored-by: Niranjan Jayakar <16217941+nija-at@users.noreply.github.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

Author: 4 people

packages/@aws-cdk/aws-apigateway/README.md

@@ -540,7 +540,8 @@ You can also define a `DomainName` resource directly in order to customize the d
 new apigw.DomainName(this, 'custom-domain', {
   domainName: 'example.com',
   certificate: acmCertificateForExampleCom,
-  endpointType: apigw.EndpointType.EDGE // default is REGIONAL
+  endpointType: apigw.EndpointType.EDGE, // default is REGIONAL
+  securityPolicy: apigw.SecurityPolicy.TLS_1_2
 });
 ```
 

packages/@aws-cdk/aws-apigateway/lib/domain-name.ts

@@ -2,7 +2,17 @@ import * as acm from '@aws-cdk/aws-certificatemanager';
 import { Construct, IResource, Resource } from '@aws-cdk/core';
 import { CfnDomainName } from './apigateway.generated';
 import { BasePathMapping, BasePathMappingOptions } from './base-path-mapping';
-import { EndpointType, IRestApi} from './restapi';
+import { EndpointType, IRestApi } from './restapi';
+
+/**
+ * The minimum version of the SSL protocol that you want API Gateway to use for HTTPS connections.
+ */
+export enum SecurityPolicy {
+  /** Cipher suite TLS 1.0 */
+  TLS_1_0 = 'TLS_1_0',
+  /** Cipher suite TLS 1.2 */
+  TLS_1_2 = 'TLS_1_2'
+}
 
 export interface DomainNameOptions {
   /**
@@ -22,6 +32,13 @@ export interface DomainNameOptions {
    * @default REGIONAL
    */
   readonly endpointType?: EndpointType;
+
+  /**
+   * The Transport Layer Security (TLS) version + cipher suite for this domain name.
+   * @see https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-apigateway-domainname.html
+   * @default SecurityPolicy.TLS_1_0
+   */
+  readonly securityPolicy?: SecurityPolicy
 }
 
 export interface DomainNameProps extends DomainNameOptions {
@@ -90,6 +107,7 @@ export class DomainName extends Resource implements IDomainName {
       certificateArn: edge ? props.certificate.certificateArn : undefined,
       regionalCertificateArn: edge ? undefined : props.certificate.certificateArn,
       endpointConfiguration: { types: [endpointType] },
+      securityPolicy: props.securityPolicy
     });
 
     this.domainName = resource.ref;

packages/@aws-cdk/aws-apigateway/test/test.domains.ts

@@ -1,5 +1,5 @@
 // tslint:disable:object-literal-key-quotes
-import { expect, haveResource } from '@aws-cdk/assert';
+import { ABSENT, expect, haveResource } from '@aws-cdk/assert';
 import * as acm from '@aws-cdk/aws-certificatemanager';
 import { Stack } from '@aws-cdk/core';
 import { Test } from 'nodeunit';
@@ -65,6 +65,53 @@ export = {
     test.done();
   },
 
+  'accepts different security policies'(test: Test) {
+    // GIVEN
+    const stack = new Stack();
+    const cert = new acm.Certificate(stack, 'Cert', { domainName: 'example.com' });
+
+    // WHEN
+    new apigw.DomainName(stack, 'my-domain', {
+      domainName: 'old.example.com',
+      certificate: cert,
+      securityPolicy: apigw.SecurityPolicy.TLS_1_0
+    });
+
+    new apigw.DomainName(stack, 'your-domain', {
+      domainName: 'new.example.com',
+      certificate: cert,
+      securityPolicy: apigw.SecurityPolicy.TLS_1_2
+    });
+
+    new apigw.DomainName(stack, 'default-domain', {
+      domainName: 'default.example.com',
+      certificate: cert
+    });
+
+    // THEN
+    expect(stack).to(haveResource('AWS::ApiGateway::DomainName', {
+      "DomainName": "old.example.com",
+      "EndpointConfiguration": { "Types": [ "REGIONAL" ] },
+      "RegionalCertificateArn": { "Ref": "Cert5C9FAEC1" },
+      "SecurityPolicy": "TLS_1_0"
+    }));
+
+    expect(stack).to(haveResource('AWS::ApiGateway::DomainName', {
+      "DomainName": "new.example.com",
+      "EndpointConfiguration": { "Types": [ "REGIONAL" ] },
+      "RegionalCertificateArn": { "Ref": "Cert5C9FAEC1" },
+      "SecurityPolicy": "TLS_1_2"
+    }));
+
+    expect(stack).to(haveResource('AWS::ApiGateway::DomainName', {
+      "DomainName": "default.example.com",
+      "EndpointConfiguration": { "Types": [ "REGIONAL" ] },
+      "RegionalCertificateArn": { "Ref": "Cert5C9FAEC1" },
+      "SecurityPolicy": ABSENT
+    }));
+    test.done();
+  },
+
   '"mapping" can be used to automatically map this domain to the deployment stage of an API'(test: Test) {
     // GIVEN
     const stack = new Stack();