fix(certificatemanager): domainName not checked for length (#21807)

## fix(AWS-CertificateManager) cap domain name to 64 characters
*fix for*: #21777
*motivation*: if a domainName that is longer than 64 characters is provided, certification creation will fail - this implements a check for string length 

----

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*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: josephedward

packages/@aws-cdk/aws-certificatemanager/lib/certificate.ts

@@ -227,6 +227,11 @@ export class Certificate extends CertificateBase implements ICertificate {
       }
     }
 
+    // check if domain name is 64 characters or less
+    if (props.domainName.length > 64) {
+      throw new Error('Domain name must be 64 characters or less');
+    }
+
     const allDomainNames = [props.domainName].concat(props.subjectAlternativeNames || []);
 
     let certificateTransparencyLoggingPreference: string | undefined;

packages/@aws-cdk/aws-certificatemanager/lib/dns-validated-certificate.ts

@@ -84,14 +84,16 @@ export class DnsValidatedCertificate extends CertificateBase implements ICertifi
     super(scope, id);
 
     this.region = props.region;
-
     this.domainName = props.domainName;
+    // check if domain name is 64 characters or less
+    if (this.domainName.length > 64) {
+      throw new Error('Domain name must be 64 characters or less');
+    }
     this.normalizedZoneName = props.hostedZone.zoneName;
     // Remove trailing `.` from zone name
     if (this.normalizedZoneName.endsWith('.')) {
       this.normalizedZoneName = this.normalizedZoneName.substring(0, this.normalizedZoneName.length - 1);
     }
-
     // Remove any `/hostedzone/` prefix from the Hosted Zone ID
     this.hostedZoneId = props.hostedZone.hostedZoneId.replace(/^\/hostedzone\//, '');
     this.tags = new cdk.TagManager(cdk.TagType.MAP, 'AWS::CertificateManager::Certificate');

packages/@aws-cdk/aws-certificatemanager/test/certificate.test.ts

@@ -81,6 +81,17 @@ test('can configure validation method', () => {
   });
 });
 
+test('throws when domain name is longer than 64 characters', () => {
+  const stack = new Stack();
+
+  expect(() => {
+    new Certificate(stack, 'Certificate', {
+      domainName: 'example.com'.repeat(7),
+    });
+  }).toThrow(/Domain name must be 64 characters or less/);
+});
+
+
 test('needs validation domain supplied if domain contains a token', () => {
   const stack = new Stack();
 
@@ -363,4 +374,5 @@ describe('Transparency logging settings', () => {
       CertificateTransparencyLoggingPreference: 'DISABLED',
     });
   });
-});
+});
+

packages/@aws-cdk/aws-certificatemanager/test/dns-validated-certificate.test.ts

@@ -225,6 +225,21 @@ test('works with imported role', () => {
   });
 });
 
+
+test('throws when domain name is longer than 64 characters', () => {
+  const stack = new Stack();
+
+  const exampleDotComZone = new PublicHostedZone(stack, 'ExampleDotCom', {
+    zoneName: 'example.com',
+  });
+  expect(() => {
+    new DnsValidatedCertificate(stack, 'Cert', {
+      domainName: 'example.com'.repeat(7),
+      hostedZone: exampleDotComZone,
+    });
+  }).toThrow(/Domain name must be 64 characters or less/);
+}),
+
 test('test transparency logging settings is passed to the custom resource', () => {
   const stack = new Stack();