What is AWS Single Sign-On responsible for in TypeScript

Question

Pulumi · Accepted Answer

AWS Single Sign-On (SSO) is a cloud service that makes it easy to centrally manage access to multiple AWS accounts and business applications. It allows users to sign in to a user portal with a single set of credentials and access all of their assigned accounts and applications from one place.

In TypeScript, when using AWS SSO with Pulumi, you would typically handle the setup of permissions and user assignments programmatically, which can include:

1. Defining permission sets (a set of permissions that can be attached to users or groups).
2. Assigning users or groups to specific AWS accounts with particular permission sets.
3. Integrating SSO with other AWS services such as Amazon Cognito for building custom user sign-in experiences.
4. Managing SSO configurations for identity providers (IdP), directories, and federations.

Below is a minimal program in TypeScript that demonstrates how to create AWS SSO permission set and assign it to a user using AWS SSO resources with Pulumi.

```typescript
import * as pulumi from "@pulumi/pulumi";
import * as aws from "@pulumi/aws";

// Create an AWS SSO Permission Set
const permissionSet = new aws.ssoadmin.PermissionSet("example-permission-set", {
    instanceArn: aws_sso_instance_ssoInstance.arn,
    name: "ExamplePermissionSet",
    // Define the permission policies
    inlinePolicy: JSON.stringify({
        Version: "2012-10-17",
        Statement: [{
            Effect: "Allow",
            Action: "sts:GetCallerIdentity",
            Resource: "*",
        }],
    }),
    // Define the managed policies
    managedPolicies: [
        "arn:aws:iam::aws:policy/ReadOnlyAccess",
    ],
});

// Assign a user to the AWS SSO Permission Set
const accountAssignment = new aws.ssoadmin.AccountAssignment("example-account-assignment", {
    instanceArn: aws_sso_instance_ssoInstance.arn,
    permissionSetArn: permissionSet.arn,
    principalId: "user-id", // Replace with the user's unique ID
    principalType: "USER",
    targetId: "account-id", // Replace with the AWS account ID
    targetType: "AWS_ACCOUNT",
});

// Export the Permission Set ARN and Account Assignment name
export const permissionSetArn = permissionSet.arn;
export const accountAssignmentName = accountAssignment.name;
```

In this program:

- We import the Pulumi SDK for managing resources and the AWS SDK for using AWS services.
- We create an AWS SSO Permission Set by providing an inline policy (JSON formatted IAM policy statements) and a list of managed policies.
- We assign this permission set to a specific AWS account using the `AccountAssignment` resource.
- We use placeholders for user IDs and account IDs, which you would replace with actual values in a real-world scenario.

Remember to replace the `principalId` with the actual user ID and `targetId` with the target AWS account ID. The `instanceArn` is the ARN of the AWS SSO instance which should be retrieved from your AWS environment where SSO has been set up.

Documentation links to the resources used here:
- [aws.ssoadmin.PermissionSet](https://www.pulumi.com/registry/packages/aws/api-docs/ssoadmin/permissionset)
- [aws.ssoadmin.AccountAssignment](https://www.pulumi.com/registry/packages/aws/api-docs/ssoadmin/accountassignment)

The above program is a foundational setup. Depending on your use case, you may need to configure SSO with external directories or set up user portals. The AWS SSO administration guide and the Pulumi documentation could provide more comprehensive information on advanced configurations and possibilities.