Readme and sample tweaks (#14801)

* Readme and sample tweaks

* Update sdk/keyvault/Azure.Security.KeyVault.Administration/readme.md

Co-authored-by: Heath Stewart <[email protected]>

* Update sdk/keyvault/Azure.Security.KeyVault.Administration/readme.md

Co-authored-by: Heath Stewart <[email protected]>

* Update sdk/keyvault/Azure.Security.KeyVault.Administration/readme.md

Co-authored-by: Heath Stewart <[email protected]>

Co-authored-by: Heath Stewart <[email protected]>

Author: christothes

sdk/keyvault/Azure.Security.KeyVault.Administration/readme.md

@@ -1,10 +1,11 @@
 # Azure KeyVault Administration client library for .NET
 
-Azure Key Vault is a cloud service for securely storing and accessing secrets. A secret is anything that you want to tightly control access to, such as API keys, passwords, or certificates. A vault is a logical group of secrets.
+Azure Key Vault is a cloud service for securely storing and accessing secrets. A secret is anything to which you want to tightly control 
+access, such as API keys, passwords, or certificates. A vault is a logical group of secrets.
 
 The Azure Key Vault administration library clients support administrative tasks such as full backup / restore and key-level role-based access control (RBAC).
 
-[Source code][admin_client_src] | [Package (NuGet)][admin_client_nuget_package] | [API reference documentation][API_reference] | [Product documentation][keyvault_docs] | [Samples][admin_client_samples]
+[Source code][admin_client_src] | [Package (NuGet)][admin_client_nuget_package] | [Product documentation][keyvault_docs] | [Samples][admin_client_samples]
 
 ## Getting started
 
@@ -22,10 +23,12 @@ dotnet install Azure.Security.KeyVault.Administration --version 4.0.0-beta.1
 See the final two steps in the next section for details on creating the Key Vault with the Azure CLI.
 
 ### Authenticate the client
-In order to interact with the Key Vault service, you'll need to create an instance of the [KeyVaultAccessControlClient][rbac_client] class. You need a **vault url**, which you may see as "DNS Name" in the portal,
- and **client secret credentials (client id, client secret, tenant id)** to instantiate a client object.
+In order to control permissions to the Key Vault service, you'll need to create an instance of the [KeyVaultAccessControlClient][rbac_client] class. 
+You need a **vault URL**, which you may see as "DNS Name" in the portal,  and **client secret credentials (client id, client secret, tenant id)** 
+to instantiate a client object.
 
-Client secret credential authentication is being used in this getting started section but you can find more ways to authenticate with [Azure identity][azure_identity]. To use the [DefaultAzureCredential][DefaultAzureCredential] provider shown below,
+Client secret credential authentication is being used in this getting started section but you can find more ways to authenticate with 
+[Azure identity][azure_identity]. To use the [DefaultAzureCredential][DefaultAzureCredential] provider shown below,
 or other credential providers provided with the Azure SDK, you should install the Azure.Identity package:
 
 ```PowerShell
@@ -57,14 +60,16 @@ Use the [Azure CLI][azure_cli] snippet below to create/get client secret credent
     ```
     "<your-service-principal-object-id>"
     ```
-* Use the returned credentials above to set  **AZURE_CLIENT_ID** (appId), **AZURE_CLIENT_SECRET** (password), and **AZURE_TENANT_ID** (tenant) environment variables. The following example shows a way to do this in Powershell:
+* Use the returned credentials above to set  **AZURE_CLIENT_ID** (appId), **AZURE_CLIENT_SECRET** (password), and **AZURE_TENANT_ID** (tenant) 
+environment variables. The following example shows a way to do this in Powershell:
     ```PowerShell
     $Env:AZURE_CLIENT_ID="generated-app-ID"
     $Env:AZURE_CLIENT_SECRET="random-password"
     $Env:AZURE_TENANT_ID="tenant-ID"
     ```
 
-* Create the Key Vault and grant the above mentioned application authorization to perform administrative operations on the Azure Key Vault (replace `<your-resource-group-name>` and `<your-key-vault-name>` with your own, unique names and `<your-service-principal-object-id>` with the value from above):
+* Create the Key Vault and grant the above mentioned application authorization to perform administrative operations on the Azure Key Vault 
+(replace `<your-resource-group-name>` and `<your-key-vault-name>` with your own, unique names and `<your-service-principal-object-id>` with the value from above):
     ```
     az keyvault create --hsm-name <your-key-vault-name> --resource-group <your-resource-group-name> --administrators <your-service-principal-object-id> --location <your-azure-location>
     ```
@@ -75,51 +80,73 @@ Use the [Azure CLI][azure_cli] snippet below to create/get client secret credent
     ```
 
 #### Create KeyVaultAccessControlClient
-Once you've populated the **AZURE_CLIENT_ID**, **AZURE_CLIENT_SECRET** and **AZURE_TENANT_ID** environment variables and replaced **your-vault-url** with the above returned URI, you can create the [KeyVaultAccessControlClient][rbac_client]:
+Once you've populated the **AZURE_CLIENT_ID**, **AZURE_CLIENT_SECRET** and **AZURE_TENANT_ID** environment variables and replaced **your-vault-url** 
+with the above returned URI, you can create the [KeyVaultAccessControlClient][rbac_client]:
 
-```C# Snippet:CreateKeyVaultAccessControlClient
-// Create a new access control client using the default credential from Azure.Identity using environment variables previously set,
-// including AZURE_CLIENT_ID, AZURE_CLIENT_SECRET, and AZURE_TENANT_ID.
-KeyVaultAccessControlClient client = new KeyVaultAccessControlClient(vaultUri: new Uri(keyVaultUrl), credential: new DefaultAzureCredential());
+```C# Snippet:HelloCreateKeyVaultAccessControlClient
+KeyVaultAccessControlClient client = new KeyVaultAccessControlClient(new Uri(keyVaultUrl), new DefaultAzureCredential());
+```
 
-// Retrieve all the role definitions.
-List<KeyVaultRoleDefinition> roleDefinitions = client.GetRoleDefinitions(KeyVaultRoleScope.Global).ToList();
+#### Create KeyVaultBackupClient
+Once you've populated the **AZURE_CLIENT_ID**, **AZURE_CLIENT_SECRET** and **AZURE_TENANT_ID** environment variables and replaced **your-vault-url** 
+with the above returned URI, you can create the [KeyVaultBackupClient][backup_client]:
 
-// Retrieve all the role assignments.
-List<KeyVaultRoleAssignment> roleAssignments = client.GetRoleAssignments(KeyVaultRoleScope.Global).ToList();
+```C# Snippet:HelloCreateKeyVaultBackupClient
+KeyVaultBackupClient client = new KeyVaultBackupClient(new Uri(keyVaultUrl), new DefaultAzureCredential());
 ```
 
 ## Key concepts
 
 ### KeyVaultRoleDefinition
-A `KeyVaultRoleDefinition` is a collection of permissions. A role definition defines the operations that can be performed, such as read, write, and delete. It can also define the operations that are excluded from allowed operations.
+A `KeyVaultRoleDefinition` is a collection of permissions. A role definition defines the operations that can be performed, such as read, write, 
+and delete. It can also define the operations that are excluded from allowed operations.
 
-RoleDefinitions can be listed and specified as part of a `KeyVaultRoleAssignment`.
+KeyVaultRoleDefinitions can be listed and specified as part of a `KeyVaultRoleAssignment`.
 
-### RoleAssignment. 
+### KeyVaultRoleAssignment. 
 A `KeyVaultRoleAssignment` is the association of a KeyVaultRoleDefinition to a service principal. They can be created, listed, fetched individually, and deleted.
 
 ### KeyVaultAccessControlClient
 A `KeyVaultAccessControlClient` provides both synchronous and asynchronous operations allowing for management of `KeyVaultRoleDefinition` and `KeyVaultRoleAssignment` objects.
 
+### KeyVaultBackupClient
+
+A `KeyVaultBackupClient` provides both synchronous and asynchronous operations for performing full key backups, full key restores, and selective key restores.
+
+### BackupOperation
+
+A `BackupOperation` represents a long running operation for a full key backup.
+
+### RestoreOperation
+
+A `RestoreOperation` represents a long running operation for both a full key and selective key restore.
+
 ## Examples
 The Azure.Security.KeyVault.Administration package supports synchronous and asynchronous APIs.
 
-The following section provides several code snippets using the `client` [created above](#create-keyvaultaccesscontrolclient), covering some of the most common Azure Key Vault access control related tasks:
+The following section provides several code snippets using the `client` created above for either [access control](#create-keyvaultaccesscontrolclient) or [backup](#create-KeyVaultBackupClient) clients, covering some of the most common Azure Key Vault access control related tasks:
 
 ### Sync examples
-- [Listing All Role Definitions](https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/keyvault/Azure.Security.KeyVault.Administration/samples/Sample1_RbacHelloWorldSync.md#listing-all-role-definitions-sync)
-- [Listing All Role Assignments](https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/keyvault/Azure.Security.KeyVault.Administration/samples/Sample1_RbacHelloWorldSync.md#listing-all-role-assignments)
-- [Creating a Role Assignment](https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/keyvault/Azure.Security.KeyVault.Administration/samples/Sample1_RbacHelloWorldSync.md#creating-a-role-assignment)
-- [Getting a Role Assignment](https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/keyvault/Azure.Security.KeyVault.Administration/samples/Sample1_RbacHelloWorldSync.md#getting-a-role-assignment)
-- [Deleting a Role Assignment](https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/keyvault/Azure.Security.KeyVault.Administration/samples/Sample1_RbacHelloWorldSync.md#deleting-a-role-assignment)
+- Access control
+    - [Listing All Role Definitions](https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/keyvault/Azure.Security.KeyVault.Administration/samples/Sample1_RbacHelloWorldSync.md#listing-all-role-definitions-sync)
+    - [Listing All Role Assignments](https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/keyvault/Azure.Security.KeyVault.Administration/samples/Sample1_RbacHelloWorldSync.md#listing-all-role-assignments)
+    - [Creating a Role Assignment](https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/keyvault/Azure.Security.KeyVault.Administration/samples/Sample1_RbacHelloWorldSync.md#creating-a-role-assignment)
+    - [Getting a Role Assignment](https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/keyvault/Azure.Security.KeyVault.Administration/samples/Sample1_RbacHelloWorldSync.md#getting-a-role-assignment)
+    - [Deleting a Role Assignment](https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/keyvault/Azure.Security.KeyVault.Administration/samples/Sample1_RbacHelloWorldSync.md#deleting-a-role-assignment)
+- Backup and restore
+    - [Performing a full key backup](https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/keyvault/Azure.Security.KeyVault.Administration/samples/Sample1_BackupHelloWorldSync.md#performing-a-full-key-backup)
+    - [Performing a full key restore](https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/keyvault/Azure.Security.KeyVault.Administration/samples/Sample1_BackupHelloWorldSync.md#performing-a-full-key-restore)
 
 ### Async examples
-- [Listing All Role Definitions](https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/keyvault/Azure.Security.KeyVault.Administration/samples/Sample1_RbacHelloWorldAsync.md#listing-all-role-definitions-sync)
-- [Listing All Role Assignments](https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/keyvault/Azure.Security.KeyVault.Administration/samples/Sample1_RbacHelloWorldAsync.md#listing-all-role-assignments)
-- [Creating a Role Assignment](https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/keyvault/Azure.Security.KeyVault.Administration/samples/Sample1_RbacHelloWorldAsync.md#creating-a-role-assignment)
-- [Getting a Role Assignment](https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/keyvault/Azure.Security.KeyVault.Administration/samples/Sample1_RbacHelloWorldAsync.md#getting-a-role-assignment)
-- [Deleting a Role Assignment](https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/keyvault/Azure.Security.KeyVault.Administration/samples/Sample1_RbacHelloWorldAsync.md#deleting-a-role-assignment)
+- Access control
+    - [Listing All Role Definitions](https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/keyvault/Azure.Security.KeyVault.Administration/samples/Sample1_RbacHelloWorldAsync.md#listing-all-role-definitions-sync)
+    - [Listing All Role Assignments](https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/keyvault/Azure.Security.KeyVault.Administration/samples/Sample1_RbacHelloWorldAsync.md#listing-all-role-assignments)
+    - [Creating a Role Assignment](https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/keyvault/Azure.Security.KeyVault.Administration/samples/Sample1_RbacHelloWorldAsync.md#creating-a-role-assignment)
+    - [Getting a Role Assignment](https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/keyvault/Azure.Security.KeyVault.Administration/samples/Sample1_RbacHelloWorldAsync.md#getting-a-role-assignment)
+    - [Deleting a Role Assignment](https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/keyvault/Azure.Security.KeyVault.Administration/samples/Sample1_RbacHelloWorldAsync.md#deleting-a-role-assignment)
+- Backup and restore
+    - [Performing a full key backup](https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/keyvault/Azure.Security.KeyVault.Administration/samples/Sample1_BackupHelloWorldAsync.md#performing-a-full-key-backup)
+    - [Performing a full key restore](https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/keyvault/Azure.Security.KeyVault.Administration/samples/Sample1_BackupHelloWorldAsync.md#performing-a-full-key-restore)
 
 ## Troubleshooting
 
@@ -185,6 +212,7 @@ additional questions or comments.
 [azure_sub]: https://azure.microsoft.com/free/
 [code_of_conduct]: https://opensource.microsoft.com/codeofconduct/
 [rbac_client]: https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/keyvault/Azure.Security.KeyVault.Administration/src/KeyVaultAccessControlClient.cs
+[backup_client]: https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/keyvault/Azure.Security.KeyVault.Administration/src/KeyVaultBackupClient.cs
 [keyvault_docs]: https://docs.microsoft.com/azure/key-vault/
 [keyvault_rest]: https://docs.microsoft.com/rest/api/keyvault/
 [admin_client_nuget_package]: https://www.nuget.org/packages?q=Azure.Security.KeyVault.Administration

sdk/keyvault/Azure.Security.KeyVault.Administration/samples/Sample2_SelectiveRestore.md

@@ -0,0 +1,21 @@
+# Performing a full key restore
+
+Using the `KeyVaultBackupClient`, you can restore a single key from backup by key name. The data source for a 
+selective key restore is a storage blob accessed using Shared Access Signature authentication. 
+For more details on creating a SAS token using the `BlobServiceClient`, see the 
+[Azure Storage Blobs client README](https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/storage/Azure.Storage.Blobs/README.md) 
+and the [authentication samples](https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/storage/Azure.Storage.Blobs/samples/Sample02_Auth.cs).
+Alternatively, it is possible to [generate a SAS token in Storage Explorer](https://docs.microsoft.com/en-us/azure/vs-azure-tools-storage-manage-with-storage-explorer?tabs=windows#generate-a-shared-access-signature-in-storage-explorer)
+
+```C# Snippet:SelectiveRestoreAsync
+// Get the folder name from the backupBlobUri returned from a previous BackupOperation.
+string[] uriSegments = backupBlobUri.Segments;
+string folderName = uriSegments[uriSegments.Length - 1];
+string keyName = <key name to restore>;
+
+// Start the restore for a specific key that was previously backed up.
+RestoreOperation restoreOperation = await Client.StartSelectiveRestoreAsync(keyName, builder.Uri, sasToken, folderName);
+
+// Wait for completion of the RestoreOperation.
+Response restoreResult = await restoreOperation.WaitForCompletionAsync();
+```

sdk/keyvault/Azure.Security.KeyVault.Administration/tests/BackupRestoreTestBase.cs

@@ -15,6 +15,7 @@ public class BackupRestoreTestBase : RecordedTestBase<KeyVaultTestEnvironment>
         public KeyVaultBackupClient Client { get; set; }
         internal string SasToken { get; set; }
         internal string BlobContainerName = "backup";
+        internal string PreviouslyBackedUpKeyName = "rsa-1";
 
         public BackupRestoreTestBase(bool isAsync, RecordedTestMode mode) : base(isAsync, mode)
         {