如何使用SAS限制azure blob容器创建 [英] How to restrict azure blob container creation using SAS

问题描述

如何设置不创建容器的权限，同时生成帐户SAS令牌？这是我的设置。

How to set permission to not create container, while generating Account SAS token? Here is my settings.

    // Create a new access policy for the account.
    SharedAccessAccountPolicy policy = new SharedAccessAccountPolicy()
    {
        Permissions = SharedAccessAccountPermissions.Read | SharedAccessAccountPermissions.Write,
        Services = SharedAccessAccountServices.Blob | SharedAccessAccountServices.Table,
        ResourceTypes = SharedAccessAccountResourceTypes.Service | SharedAccessAccountResourceTypes.Container | SharedAccessAccountResourceTypes.Object,
        SharedAccessExpiryTime = DateTime.UtcNow.AddMinutes(2),
        Protocols = SharedAccessProtocol.HttpsOrHttp
    };

推荐答案

更新答案：

由于您有多个容器，帐户SAS是一个不错的选择。

Given that you have multiple containers, the account SAS is a good option. You'll need one for the admin and one for the user.

以下是如何创建管理员SAS的示例：

Here's an example of how to create the admin SAS:

// Create a new access policy for the account.
SharedAccessAccountPolicy policy = new SharedAccessAccountPolicy()
{
    // SAS for Blob service only.
    Services = SharedAccessAccountServices.Blob,

    // Admin has read, write, list, and delete permissions on all containers.
    // In order to write blobs, Object resource type must also be specified.
    ResourceTypes = SharedAccessAccountResourceTypes.Container | SharedAccessAccountResourceTypes.Object,

    Permissions = SharedAccessAccountPermissions.Read | 
        SharedAccessAccountPermissions.Write |
        SharedAccessAccountPermissions.Create | 
        SharedAccessAccountPermissions.List | 
        SharedAccessAccountPermissions.Delete,
    SharedAccessExpiryTime = DateTime.UtcNow.AddHours(24),
    Protocols = SharedAccessProtocol.HttpsOnly
};

下面是如何创建用户SAS的示例：

And here's an example of how to create the user SAS:

// Create a new access policy for the account.
SharedAccessAccountPolicy policy = new SharedAccessAccountPolicy()
{
    // SAS for Blob service only.
    Services = SharedAccessAccountServices.Blob,

    // User has create, read, write, and delete permissions on blobs.
    ResourceTypes = SharedAccessAccountResourceTypes.Object,

    Permissions = SharedAccessAccountPermissions.Read |
        SharedAccessAccountPermissions.Write |
        SharedAccessAccountPermissions.Create |
        SharedAccessAccountPermissions.Delete,
    SharedAccessExpiryTime = DateTime.UtcNow.AddHours(24),
    Protocols = SharedAccessProtocol.HttpsOnly
};

原始答案：

使用帐户SAS作为管理SAS，但您应该能够在用户SAS的容器上使用服务SAS，除非您需要一个帐户SAS，我不能从您的问题中了解。这可能是更好的使用服务SAS，当你可以使用你可以使用最不复杂的权限。此外，您可以使用存储的访问策略与服务SAS，我们建议作为最佳做法，以便它可以很容易撤销SAS，如果它被破坏。

You definitely need to use an account SAS for the admin SAS, but you should be able to use a service SAS on the container for the user SAS, unless you have a need for an account SAS that I am not understanding from your question. It's probably better to use the service SAS when you can so that you can use the least complicated permissions. Also, you can use a stored access policy with the service SAS, which we recommend as a best practice so that it's easy to revoke the SAS if it were ever compromised.

使用服务SAS，您不需要限制容器创建的权限，因为服务SAS不允许您首先创建容器。

With the service SAS, you don't need a permission to restrict container creation, because the service SAS doesn't allow you to create a container in the first place.

下面是在容器上创建服务SAS的代码，包括存储的访问策略：

Here's code to create the service SAS on the container, including the stored access policy:

        // Create the storage account with the connection string.
        CloudStorageAccount storageAccount = CloudStorageAccount.Parse(CloudConfigurationManager.GetSetting("StorageConnectionString"));

        // Create the blob client object.
        CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();

        // Get a reference to the container for which shared access signature will be created.
        CloudBlobContainer container = blobClient.GetContainerReference("mycontainer");
        container.CreateIfNotExists();

        // Create blob container permissions, consisting of a shared access policy 
        // and a public access setting. 
        BlobContainerPermissions containerPermissions = container.GetPermissions();

        // Clear the container's shared access policies to avoid naming conflicts if you run this method more than once.
        //blobPermissions.SharedAccessPolicies.Clear();

        // The shared access policy provides 
        // read/write access to the container for 24 hours.
        containerPermissions.SharedAccessPolicies.Add("mypolicy", new SharedAccessBlobPolicy()
        {
            // To ensure SAS is valid immediately, don’t set start time.
            // This way, you can avoid failures caused by small clock differences.
            // Note that the Create permission allows the user to create a new blob, as does Write.
            SharedAccessExpiryTime = DateTime.UtcNow.AddHours(24),
            Permissions = SharedAccessBlobPermissions.Write |
               SharedAccessBlobPermissions.Read | SharedAccessBlobPermissions.Create | SharedAccessBlobPermissions.Delete
        });

        // The public access setting explicitly specifies that 
        // the container is private, so that it can't be accessed anonymously.
        containerPermissions.PublicAccess = BlobContainerPublicAccessType.Off;

        // Set the permission policy on the container.
        container.SetPermissions(containerPermissions);

        // Get the shared access signature to share with users.
        string sasToken =
           container.GetSharedAccessSignature(null, "mypolicy");

查看这里显示的示例： https：// azure.microsoft.com/en-us/documentation/articles/storage-dotnet-shared-access-signature-part-1/#examples-create-and-use-shared-access-signatures 。

Take a look at the examples shown here: https://azure.microsoft.com/en-us/documentation/articles/storage-dotnet-shared-access-signature-part-1/#examples-create-and-use-shared-access-signatures.

另请参阅 https：/ /msdn.microsoft.com/en-us/library/azure/dn140255.aspx 和 https://msdn.microsoft.com/en-us/library/azure/mt584140.aspx 。

让我们知道如果您有任何其他问题。

Let us know if you have any other questions.

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