feat(cognito): validate oidc provider name (#28802)

Closes #28667.

----

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

packages/aws-cdk-lib/aws-cognito/lib/user-pool-idps/oidc.ts

@@ -107,10 +107,6 @@ export class UserPoolIdentityProviderOidc extends UserPoolIdentityProviderBase {
   constructor(scope: Construct, id: string, props: UserPoolIdentityProviderOidcProps) {
     super(scope, id, props);
 
-    if (props.name && !Token.isUnresolved(props.name) && (props.name.length < 3 || props.name.length > 32)) {
-      throw new Error(`Expected provider name to be between 3 and 32 characters, received ${props.name} (${props.name.length} characters)`);
-    }
-
     const scopes = props.scopes ?? ['openid'];
 
     const resource = new CfnUserPoolIdentityProvider(this, 'Resource', {
@@ -140,6 +136,11 @@ export class UserPoolIdentityProviderOidc extends UserPoolIdentityProviderBase {
       if (!Token.isUnresolved(name) && (name.length < 3 || name.length > 32)) {
         throw new Error(`Expected provider name to be between 3 and 32 characters, received ${name} (${name.length} characters)`);
       }
+      // https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-cognito-userpoolidentityprovider.html#cfn-cognito-userpoolidentityprovider-providername
+      // u is for unicode
+      if (!name.match(/^[^_\p{Z}][\p{L}\p{M}\p{S}\p{N}\p{P}][^_\p{Z}]+$/u)) {
+        throw new Error(`Expected provider name must match [^_\p{Z}][\p{L}\p{M}\p{S}\p{N}\p{P}][^_\p{Z}]+, received ${name}`);
+      }
       return name;
     }
 

packages/aws-cdk-lib/aws-cognito/test/user-pool-idps/oidc.test.ts

@@ -173,6 +173,22 @@ describe('UserPoolIdentityProvider', () => {
       })).toThrow(/Expected provider name to be between 3 and 32 characters/);
     });
 
+    test('throws with provider name that doesn\'t match pattern', () => {
+      // GIVEN
+      const stack = new Stack();
+      const pool = new UserPool(stack, 'userpool');
+      const name = ' thisisabadname';
+
+      // THEN
+      expect(() => new UserPoolIdentityProviderOidc(stack, 'userpoolidp', {
+        userPool: pool,
+        name,
+        clientId: 'client-id',
+        clientSecret: 'client-secret',
+        issuerUrl: 'https://my-issuer-url.com',
+      })).toThrow(`Expected provider name must match [^_\p{Z}][\p{L}\p{M}\p{S}\p{N}\p{P}][^_\p{Z}]+, received ${name}`);
+    });
+
     test('generates a valid name when unique id is too short', () => {
       // GIVEN
       const stack = new Stack();