Before we even start discussing about this feature we must have an idea about Azure Storage accounts and how the security works in Azure.
You can access your Azure storage account linked container because you are the owner, but let’s say you want to share this access (full or Partial) for a blob/container with someone else; to do this you must configure security keys.
In Azure portal security works on two types of Keys and you can use these keys in order to fulfill your security requirements; these are:
a. Storage Access Key (Shared Storage Key)
b. Shared Access Signature Key
Storage Access Key (Shared Storage Key): This is an Admin key which provides full access on your storage account and with this key the person can do any operation on underlying container\blob.
Shared Access Signature Key: This is another key which can be used to provide granular access on the container and helps you enforce restricted permissions (read only, read\write with expiry etc.) this key is also known as SAS Key. SAS key normally looks like a URL which defines the resources you can access along with permissions and the validity of the SAS Key.
How to get these keys:
Storage Access Key (Shared Storage Key)
Azure portal provides the Shared Storage Key and you don’t need to use any other tool. All you need to do is login to your Azure Portal, select the Storage Account and select Manage Access Keys from the lower bottom of the portal. Refer the screenshots below:
You can easily copy the access key by using the copy link, marked in the image above.
Shared Access Signature Key
As of now unfortunately Azure portal doesn’t have a GUI for this, if you want to generate a SAS key you can do that either by Programming (by calling REST APIs or by using PowerShell cmdlets) or by using Freeware or third party tools. Let me show you a way to generate this key by using an awesome freeware codeplex (open source) project named “Azure Storage Explorer” which is contributed by David.
You can download the tool from here….. It’s a small 3 MB file. The new version is very intuitive and has many new features….Once the tool has been installed you must add your storage account; in order to add your account you have to provide your Storage Access Key. Refer the screenshot below:
Once the Storage account has been added you can easily navigate the Storage account and containers, select the container where you want to configure the SAS key and select Security from the upper tab.
It will popup a window with two Tabs: Access Level and Shared Access Signature. You can change the default behavior of your storage container or configure a SAS key by using the tabs respectively. Refer the screenshots below to get more clarity.
You can read more about the tool on David’s website….here