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Create a User Delegation SAS Using Azure CLI

By using a user delegation SAS, we can help to improve the security of access to an Azure Blob storage container. Unlike a normal shared access signature (SAS), a user delegation SAS is associated with an Azure Active Directory (AAD) identity. A user delegation SAS is a service SAS that only supports Blob storage. In this lab, you will create a user delegation SAS using Azure CLI. We'll then be able to use this user delegation SAS to access a blob. After completing this lab, you'll understand how to create and revoke a user delegation SAS using Azure CLI. **Scenario** As you walk through the lab, consider the following scenario: You work as an Azure Security Engineer for The Pupper Camp (TPC). TPC is a dog services company with offices across the globe. Microsoft recommends using a user delegation SAS when possible, so your manager has asked you to test the functionality of a user delegation SAS and demonstrate how to create and revoke access to a blob object in an Azure storage account. This is part of a proof of concept that TPC is developing, which will eventually be configured using an Entra ID Service Principal.

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Path Info

Level
Clock icon Intermediate
Duration
Clock icon 1h 0m
Published
Clock icon Jun 05, 2020

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Table of Contents

  1. Challenge

    Upload a File to Blob Storage

    1. Use the Azure Portal to upload a small file to the container1 container in the storage account to Blob storage.

  2. Challenge

    Create a User Delegation SAS

    1. Use Azure Cloud Shell to create a Bash shell.

      • Subscription: Default
      • Cloud Shell region: same as your lab provided storage account
      • Resource group: Use existing
      • Storage account: Use existing
      • File share: Create new and enter in cloudshell.

    2. Once in the shell, create a user delegation SAS.

  3. Challenge

    Revoke a User Delegation SAS

    1. Revoke all user delegation keys associated with the storage account:

      Note: To verify that the user delegation SAS no longer works, you may need to wait up to 5 minutes and then try using the link generated earlier. It should no longer work, and you will see an "AuthenticationFailed" message.

A Cloud Guru - Labs - Create a User Delegation SAS Using Azure CLI
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A Cloud Guru

The Cloud Content team comprises subject matter experts hyper focused on services offered by the leading cloud vendors (AWS, GCP, and Azure), as well as cloud-related technologies such as Linux and DevOps. The team is thrilled to share their knowledge to help you build modern tech solutions from the ground up, secure and optimize your environments, and so much more!

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