![]() ![]() set the required permissions on the SAS token IPRange = new SasIPRange(IPAddress.Parse(startIPAddress), IPAddress.Parse(endIPAddress)),ĮxpiresOn = (60), // Expiration time for the SAS token set properties on BlobSasBuilder class Var blobClient = containerClient.GetBlobClient(blobName) Var containerClient = blobServiceClient.GetBlobContainerClient(containerName) ![]() Var blobServiceClient = new BlobServiceClient(connectionString) In this blog post we will focus on using the account key to sign the SAS tokens. NET, you can utilize the library, a part of the Azure SDK for. To generate the SAS tokens programmatically in. This will be our focus of this blog post.Ĭreating SAS tokens programmatically in. To learn more take a look at Create a service SAS or Create an account SAS. Should your key get rotated after you have created a SAS token and before it has expired it will invalidate the SAS. One thing to keep in mind with this approach is the rotation of these keys as a security best practice. We will cover this method in a future blog post.Ī service or account SAS token is signed with the storage account key (Shared Key), granting access based on the SAS tokens' signing method. To learn more take a look at Create a user delegation SAS. If it is not possible to use user delegation, then move to the Shared Key signing method. Microsoft recommends that you use this approach when signing SAS tokens as it is more secure than using the account key. You can sign a SAS token with a user delegation key or with a storage account key (Shared Key).Ī user delegation SAS token is signed with a user delegation key created using Azure AD credentials. If you are interested in learning more about SAS tokens, you can find more information in this document Storage SAS Overview (be sure to check out the Best Practices section which contains a few of the features we have and will discuss in this blog post).Įvery SAS token is signed with a key. By defining precise permissions (read, write, list, delete, etc.) and setting an appropriate expiration time, you can ensure that the SAS token is valid only for the required duration and with limited access. Granting excessive permissions in the SAS token could expose your data to unnecessary risks. Only provide the necessary permissions required for the specific task. When generating SAS tokens, adhering to the least privileged principle is crucial. This provides a powerful mechanism to grant temporary, controlled access to your Blob Storage without compromising your account's primary access keys. When you create a SAS token, you can define its permissions, validity period, and which resources can be accessed. Here are some additional use cases for using SAS if you are interested in learning more.Ī SAS token is a secure, time-limited URL that grants limited access to specific resources in your Azure Blob Storage account. For example, when collaborating with external users or granting access to temporary services, SAS tokens offer a secure approach for limited access without the need for permanent user accounts. SAS tokens are particularly useful in scenarios where you need to grant time-limited, fine-grained access to specific resources without granting broader permissions. In many scenarios, Role-Based Access Control (RBAC) using Azure Active Directory (Azure AD) or other identity providers should be the primary choice for access control and security enforcement. While Shared Access Signature (SAS) tokens provide a valuable mechanism for granting temporary, controlled access to specific resources in Azure Blob Storage, it is essential to acknowledge that SAS is not always the first option for security measures. ![]() ![]() Please check it out if you would like to have an example of this running locally in a Console app. NET, to enhance the security of your Azure Blob Storage.Īll the code used in this blob post can be found in Github. In this blog post, we'll explore how to create SAS tokens in. To safeguard your data while granting controlled access to authorized users, one effective approach is to generate Shared Access Signature (SAS) tokens programmatically in. Azure Blob Storage is a popular cloud storage solution, allowing you to store and manage unstructured data. In today's digital landscape, data security and controlled access are critical concerns for businesses. ![]()
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