示例#1
0
def _create_diagnostic_settings(cli_ctx, acr, workspace):
    from azure.mgmt.monitor import MonitorManagementClient
    from azure.mgmt.monitor.models import (DiagnosticSettingsResource,
                                           RetentionPolicy, LogSettings,
                                           MetricSettings)
    from azure.cli.core.commands.client_factory import get_mgmt_service_client

    client = get_mgmt_service_client(cli_ctx, MonitorManagementClient)
    def_retention_policy = RetentionPolicy(enabled=True, days=0)
    logs = [
        LogSettings(enabled=True,
                    category="ContainerRegistryRepositoryEvents",
                    retention_policy=def_retention_policy),
        LogSettings(enabled=True,
                    category="ContainerRegistryLoginEvents",
                    retention_policy=def_retention_policy)
    ]
    metrics = [
        MetricSettings(enabled=True,
                       category="AllMetrics",
                       retention_policy=def_retention_policy)
    ]
    parameters = DiagnosticSettingsResource(workspace_id=workspace,
                                            metrics=metrics,
                                            logs=logs)

    client.diagnostic_settings.create_or_update(
        resource_uri=acr.id,
        parameters=parameters,
        name=DEF_DIAG_SETTINGS_NAME_TEMPLATE.format(acr.name))
    def create_or_update_logprofile(self):
        '''
        Creates or Update log profile.

        :return: deserialized log profile state dictionary
        '''
        self.log("Creating log profile instance {0}".format(self.name))

        try:
            params = LogProfileResource(
                location=self.location,
                locations=self.locations,
                categories=self.categories,
                retention_policy=RetentionPolicy(
                    days=self.retention_policy['days'],
                    enabled=self.retention_policy['enabled'])
                if self.retention_policy else None,
                storage_account_id=self.storage_account
                if self.storage_account else None,
                service_bus_rule_id=self.service_bus_rule_id
                if self.service_bus_rule_id else None,
                tags=self.tags)

            response = self.monitor_client.log_profiles.create_or_update(
                log_profile_name=self.name, parameters=params)
            if isinstance(response, AzureOperationPoller):
                response = self.get_poller_result(response)

        except CloudError as exc:
            self.log('Error attempting to create/update log profile.')
            self.fail("Error creating/updating log profile: {0}".format(
                str(exc)))
        return logprofile_to_dict(response)
示例#3
0
def setup_auto_scale_diagnostics(
    auto_scale_resource_uri: str,
    auto_scale_resource_name: str,
    log_analytics_workspace_id: str,
) -> Union[DiagnosticSettingsResource, Error]:
    logging.info("Setting up diagnostics for auto scale")
    client = get_monitor_client()

    log_settings = LogSettings(
        enabled=True,
        category_group="allLogs",
        retention_policy=RetentionPolicy(enabled=True, days=30),
    )

    params: Dict[str, Any] = {
        "logs": [log_settings],
        "workspace_id": log_analytics_workspace_id,
    }

    try:
        diagnostics = client.diagnostic_settings.create_or_update(
            auto_scale_resource_uri,
            "%s-diagnostics" % auto_scale_resource_name, params)
        logging.info("Diagnostics created for auto scale resource: %s" %
                     auto_scale_resource_uri)
        return diagnostics
    except (ResourceNotFoundError, CloudError):
        return Error(
            code=ErrorCode.UNABLE_TO_CREATE,
            errors=[
                "unable to setup diagnostics for auto scale resource: %s" %
                (auto_scale_resource_uri)
            ],
        )
示例#4
0
def create_log_profile_operations(client, name, location, locations, categories, days, enabled, tags=None,
                                  storage_account_id=None, service_bus_rule_id=None):
    from azure.mgmt.monitor.models.log_profile_resource import LogProfileResource
    from azure.mgmt.monitor.models import RetentionPolicy
    parameters = LogProfileResource(location=location, locations=locations, categories=categories,
                                    retention_policy=RetentionPolicy(days=days, enabled=enabled),
                                    storage_account_id=storage_account_id, service_bus_rule_id=service_bus_rule_id,
                                    tags=tags)
    return client.create_or_update(log_profile_name=name, parameters=parameters)
示例#5
0
    def createLogProfile(self, name, storageAccountId, subscriptionId):
        monitorMgmtClient = self.getMonitorManagementClient(subscriptionId)

        locations = [l.name for l in self.getSubscriptionClient().subscriptions.list_locations(subscriptionId)]
        locations.append("global")

        parameters = LogProfileResource()
        parameters.storage_account_id = storageAccountId
        parameters.locations = locations
        parameters.categories = ["Write", "Delete", "Action"]
        parameters.location = "westus2"
        parameters.retention_policy = RetentionPolicy(enabled=True, days=7)

        monitorMgmtClient.log_profiles.create_or_update(name, parameters)
 def test_remediate_success_with_stg(self):
     client_id = Mock()
     tenant_id = Mock()
     storage_client = Mock()
     keyvault_client = Mock()
     monitor_client = Mock()
     graph_client = Mock()
     credentials = Mock()
     log = LogSettings(
         category="AuditEvent",
         enabled=True,
         retention_policy=RetentionPolicy(enabled=True, days=180),
     )
     action = EnableKeyVaultLogging()
     action.check_stg_account = Mock()
     action.create_diagnostic_setting = Mock()
     """
     StorageAccountListResult = Mock()
     storage_accounts_list = []
     storage_accounts_list.append(StorageAccountListResult)
     action.check_stg_account.return_value = storage_accounts_list
     """
     action.check_stg_account.return_value = StorageAccount(
         id=
         "/subscriptions/d687b1a3-9b78-43b1-a17b-7de297fd1fce/resourceGroups/kshrutika-1/providers/Microsoft.Storage/storageAccounts/chss538f633keyvaultlogs",
         name="chss538f633keyvaultlogs",
         location="eastus",
     )
     action.create_diagnostic_setting.return_value = DiagnosticSettingsResource(
         storage_account_id=
         "/subscriptions/d687b1a3-9b78-43b1-a17b-7de297fd1fce/resourceGroups/kshrutika-1/providers/Microsoft.Storage/storageAccounts/chss538f633keyvaultlogs",
         logs=[log],
     )
     assert (action.remediate(
         client_id,
         tenant_id,
         keyvault_client,
         monitor_client,
         storage_client,
         graph_client,
         credentials,
         "resource_group",
         "key_vault_name",
         "region",
         "subscription_id",
     ) == 0)
     assert action.create_diagnostic_setting.call_count == 1
def configure_azure_monitor(resource_group_name, location, event_hub_namespace, location_list):
    print("Configuring Azure Monitor to publish activity events")
    monitorClient = get_client_from_cli_profile(MonitorManagementClient)
    eventHubClient = get_client_from_cli_profile(EventHubManagementClient)

    root_manage_key = eventHubClient.namespaces.get_authorization_rule(
        resource_group_name, event_hub_namespace, "RootManageSharedAccessKey")
    event_hub_rule_id = root_manage_key.id
    print("Using event hub policy key " + event_hub_rule_id)

    # If there are any extant log profiles not named "azure-events" delete them
    log_profiles = monitorClient.log_profiles.list()
    for lp in log_profiles:
        print("Found existing log profile with name " + lp.name + " and id " + lp.id)
        if lp.name != "default":
            print("Deleting log profile " + lp.name)
            monitorClient.log_profiles.delete(lp.name)

    # Create an Azure Log Profile
    from azure.mgmt.monitor.models import LogProfileResource
    from azure.mgmt.monitor.models import RetentionPolicy
    log_profile = monitorClient.log_profiles.create_or_update(
        "default",
        LogProfileResource(
            location = location,
            service_bus_rule_id = event_hub_rule_id,
            locations = location_list,
            categories = ["Write", "Delete", "Action"],
            retention_policy = RetentionPolicy(
                enabled = True,
                days = 1
            )
        )
    )
    print(log_profile)
    
    print("Creating listen policy for implicitly created event hug")
    event_hub_name_implicit = "insights-operational-logs"
    auth_rule = eventHubClient.event_hubs.create_or_update_authorization_rule(resource_group_name, event_hub_namespace, event_hub_name_implicit, "listen", "Listen")
    key = eventHubClient.event_hubs.list_keys(resource_group_name, event_hub_namespace, event_hub_name_implicit, "listen")
    print("Use authorization rule with Listen rights named " + key.key_name + " and connection string " + key.primary_connection_string)
    def remediate(
        self,
        monitor_client,
        graph_client,
        storage_client,
        keyvault_client,
        client_id,
        tenant_id,
        credentials,
        resource_group_name,
        account_name,
        region,
        subscription_id,
    ):
        """Enable Soft Delete for Storage Account Blob Service
        :param client_id: Azure Client ID.
        :param tenant_id: Azure Tenant ID.
        :param graph_client: Instance of the AzureGraphRbacManagementClient.
        :param keyvault_client: Instance of the Azure KeyVaultManagementClient.
        :param storage_client: Instance of the Azure StorageManagementClient.
        :param monitor_client: Instance of the Azure MonitorClient.
        :param credentials: Azure Credential object.
        :param resource_group_name: The name of the resource group to which the storage account belongs.
        :param account_name: The name of the Storage Account.
        :param region: The region in which the key vault is present.
        :param subscription_id: Azure Subscription Id
        :type client_id: str
        :type tenant_id: str
        :type graph_client: object
        :type keyvault_client: object
        :type storage_client: object
        :type monitor_client: object
        :type credentials: object
        :type resource_group_name: str.
        :type account_name: str.
        :type region: str.
        :type subscription_id: str
        :returns: Integer signaling success or failure
        :rtype: int
        :raises: msrestazure.azure_exceptions.CloudError
        """
        try:
            app_details = graph_client.applications.get_service_principals_id_by_app_id(
                application_id=client_id)

            # Check if the identity is assigned to the Storage Account. If not then assign the identity.
            principal_id = self.ensure_identity_assigned(
                resource_group_name, account_name, region, storage_client)

            # Check if the Key Vault created by CHSS exists in the given region and resource group.
            key_vault_name = generate_name(region, subscription_id,
                                           resource_group_name)
            key_vault = self.check_key_vault(keyvault_client, region,
                                             key_vault_name,
                                             resource_group_name)
            if key_vault is None:
                # If the Key Vault does not exists then create the Key Vault.
                key_vault = self.create_key_vault(
                    keyvault_client,
                    resource_group_name,
                    key_vault_name,
                    region,
                    tenant_id,
                    app_details.value,
                    principal_id,
                )
                # Create a Key to encrypt the Storage Account.
                key = self.create_key(credentials, key_vault_name,
                                      account_name)
                log = LogSettings(
                    category="AuditEvent",
                    enabled=True,
                    retention_policy=RetentionPolicy(enabled=True, days=180),
                )

                # Check if the Storage Account created by CHSS exists in the given region and resource group.
                stg_name = generate_name(region, subscription_id,
                                         resource_group_name)
                stg_account = self.check_stg_account(storage_client, region,
                                                     stg_name,
                                                     resource_group_name)
                if stg_account is None:
                    # If the Storage Account does not exists then create the Storage Account.
                    stg_account = self.create_storage_account(
                        resource_group_name, stg_name, region, storage_client)

                    # Create a Key to encrypt the Storage Account.
                    key = self.create_key(credentials, key_vault.name,
                                          stg_account.name)
                    # Update the Access policy for the Key Vault to give access to the Storage Account which is being created.
                    self.update_key_vault_access_policy(
                        keyvault_client,
                        resource_group_name,
                        key_vault_name,
                        tenant_id,
                        app_details.value,
                        stg_account.identity.principal_id,
                    )
                    # Encrypt the Storage Account which is being created with the above Key.
                    self.update_storage_account_encryption(
                        storage_client,
                        resource_group_name,
                        stg_name,
                        key.name,
                        key_vault.properties.vault_uri,
                    )
                # Create Diagnostic Setting to store key vault logs
                self.create_diagnostic_setting(
                    monitor_client,
                    key_vault.id,
                    key_vault.name,
                    stg_account.id,
                    log,
                )
            else:
                # If the Key Vault exists then update the access policy to give access to app and the Storage Account
                self.update_key_vault_access_policy(
                    keyvault_client,
                    resource_group_name,
                    key_vault_name,
                    tenant_id,
                    app_details.value,
                    principal_id,
                )
                # Create a Key to encrypt the Storage Account.
                key = self.create_key(credentials, key_vault.name,
                                      account_name)
            # Encrypt the Storage Account with the Key which was created.
            self.update_storage_account_encryption(
                storage_client,
                resource_group_name,
                account_name,
                key.name,
                key_vault.properties.vault_uri,
            )

        except Exception as e:
            logging.error(f"{str(e)}")
            raise

        return 0
示例#9
0
    def remediate(
        self,
        client_id,
        tenant_id,
        credentials,
        client,
        client_storage,
        keyvault_client,
        graph_client,
        monitor_client,
        client_authorization,
        resource_group_name,
        sql_server_name,
        region,
        subscription_id,
    ):
        """Enable Server blob auditing policy for Azure SQL Server
        :param client_id: Azure Client ID.
        :param tenant_id: Azure Tenant ID.
        :param graph_client: Instance of the AzureGraphRbacManagementClient.
        :param keyvault_client: Instance of the Azure KeyVaultManagementClient.
        :param monitor_client: Instance of the Azure MonitorClient.
        :param credentials: Azure Credential object.
        :param client: Instance of the Azure SqlManagementClient.
        :param client_storage: Instance of the Azure StorageManagementClient.
        :param resource_group_name: The name of the resource group to which the SQL Server belongs.
        :param sql_server_name: The name of the SQL Server.
        :param subscription_id: Azure Subscription Id
        :type client_id: str
        :type tenant_id: str
        :type graph_client: object
        :type keyvault_client: object
        :type client_storage: object
        :type monitor_client: object
        :type credentials: object
        :type client: object
        :type resource_group_name: str.
        :type sql_server_name: str.
        :type region: str.
        :type subscription_id: str
        :returns: Integer signaling success or failure
        :rtype: int
        :raises: msrestazure.azure_exceptions.CloudError
        """
        try:
            guid = uuid.uuid4()
            # Check if identity is assigned. If not then assign the identity.
            principalId = self.ensure_identity_assigned(
                client, resource_group_name, sql_server_name, region
            )
            # Check if the Storage Account Created by CHSS exists
            stg_name = generate_name(region, subscription_id, resource_group_name)
            stg_account = self.check_stg_account(
                client_storage, region, stg_name, resource_group_name
            )
            # If Storage Account created by CHSS does not exists
            if stg_account is None:
                # Create a Storage Account to store logs if it does not exists
                stg_account = self.create_storage_account(
                    resource_group_name, stg_name, region, client_storage,
                )

                app_details = graph_client.applications.get_service_principals_id_by_app_id(
                    application_id=client_id
                )
                log = LogSettings(
                    category="AuditEvent",
                    enabled=True,
                    retention_policy=RetentionPolicy(enabled=True, days=180),
                )
                # Check if the keyvault created by CHSS exists
                encryption_key_vault_name = generate_name(
                    region, subscription_id, resource_group_name
                )
                key_vault = self.check_key_vault(
                    keyvault_client,
                    region,
                    encryption_key_vault_name,
                    resource_group_name,
                )
                # If Key Vault created by CHSS does not exists
                if key_vault is None:
                    # Create a Key Vault if it does not exists
                    key_vault = self.create_key_vault(
                        keyvault_client,
                        resource_group_name,
                        encryption_key_vault_name,
                        region,
                        tenant_id,
                        app_details.value,
                        stg_account.identity.principal_id,
                    )
                    # Create a Key to encrypt the Storage Account
                    key = self.create_key(
                        credentials, encryption_key_vault_name, stg_account.name
                    )
                    # Create a diagnostic setting to store Key Vault logs
                    self.create_diagnostic_setting(
                        monitor_client,
                        key_vault.id,
                        key_vault.name,
                        stg_account.id,
                        log,
                    )
                else:
                    # If the Key Vault exists. Update the access policy of the Key Vault by giving access to the app and Storage Account
                    self.update_key_vault_access_policy(
                        keyvault_client,
                        resource_group_name,
                        key_vault.name,
                        tenant_id,
                        app_details.value,
                        stg_account.identity.principal_id,
                    )
                    # Create a Key to encrypt the Storage Account
                    key = self.create_key(credentials, key_vault.name, stg_account.name)
                # Encrypt the Storage Account using the Key which was created
                self.update_storage_account_encryption(
                    client_storage,
                    resource_group_name,
                    stg_account.name,
                    key.name,
                    key_vault.properties.vault_uri,
                )

                scope = f"/subscriptions/{subscription_id}/resourceGroups/{resource_group_name}/providers/Microsoft.Storage/storageAccounts/{stg_account.name}"
                # Assign Storage Blob Contributer role to the SQL Server
                self.create_role_assignment(
                    stg_name,
                    subscription_id,
                    client_authorization,
                    guid,
                    scope,
                    principalId,
                    sql_server_name,
                )
            else:
                # If the Storage Account Created by CHSS exists
                stg_id = stg_account.id
                stg_components = stg_id.split("/")
                if len(stg_components) > MAX_COUNT_COMPONENT:
                    resource_grp = stg_components[MAX_COUNT_COMPONENT]
                    scope = f"/subscriptions/{subscription_id}/resourceGroups/{resource_grp}/providers/Microsoft.Storage/storageAccounts/{stg_account.name}"
                    role_definition_id = f"/subscriptions/{subscription_id}/providers/Microsoft.Authorization/roleDefinitions/ba92f5b4-2d11-453d-a403-e96b0029c9fe"
                    # Check if the role assignment for the SQL Server in the Storage Account already exists
                    status = self.check_role_assignment(
                        client_authorization, scope, principalId, role_definition_id
                    )
                    if status is False:
                        # If role assignment does not exists, assign the Storage Blob Contributer Role to the SQL Server
                        self.create_role_assignment(
                            stg_account.name,
                            subscription_id,
                            client_authorization,
                            guid,
                            scope,
                            principalId,
                            sql_server_name,
                        )
                else:
                    logging.error("Resource group name not found")
                    return -1
            # Enable blob auditing for the SQL Server
            self.create_server_blob_auditing_policy(
                resource_group_name, sql_server_name, stg_account.name, client
            )
        except Exception as e:
            logging.error(f"{str(e)}")
            raise
        return 0
 def remediate(
     self,
     client_id,
     tenant_id,
     keyvault_client,
     monitor_client,
     storage_client,
     graph_client,
     credentials,
     resource_group_name,
     key_vault_name,
     region,
     subscription_id,
 ):
     """Enable key vault logging
     :param client_id: Azure Client ID.
     :param tenant_id: Azure Tenant ID.
     :param graph_client: Instance of the AzureGraphRbacManagementClient.
     :param keyvault_client: Instance of the Azure KeyVaultManagementClient.
     :param storage_client: Instance of the Azure StorageManagementClient.
     :param monitor_client: Instance of the Azure MonitorClient.
     :param credentials: Azure Credential object.
     :param resource_group_name: The name of the resource group to which the storage account belongs.
     :param key_vault_name: The name of the key vault.
     :param region: The region in which the key vault is present.
     :param subscription_id: Azure Subscription Id
     :type client_id: str
     :type tenant_id: str
     :type graph_client: object
     :type keyvault_client: object
     :type storage_client: object
     :type monitor_client: object
     :type credentials: object
     :type resource_group_name: str.
     :type key_vault_name: str.
     :type region: str.
     :type subscription_id: str
     :returns: Integer signaling success or failure
     :rtype: int
     :raises: msrestazure.azure_exceptions.CloudError
     """
     try:
         key_vault = keyvault_client.vaults.get(
             resource_group_name=resource_group_name,
             vault_name=key_vault_name,
         )
         log = LogSettings(
             category="AuditEvent",
             enabled=True,
             retention_policy=RetentionPolicy(enabled=True, days=180),
         )
         app_details = graph_client.applications.get_service_principals_id_by_app_id(
             application_id=client_id)
         # Check if the Storage Account Created by CHSS is available in the same region and resource group
         stg_name = generate_name(region, subscription_id,
                                  resource_group_name)
         stg_account = self.check_stg_account(storage_client, region,
                                              stg_name, resource_group_name)
         if stg_account is None:
             # If the Storage Account does not exists, create a storage account to store logs
             logging.info("    Creating a Storage Account")
             logging.info(
                 "    executing client_storage.storage_accounts.begin_create"
             )
             logging.info(
                 f"      resource_group_name={resource_group_name}")
             logging.info(f"      account_name={stg_name}")
             stg_account = self.create_storage_account(
                 resource_group_name, stg_name, region, storage_client)
             # Check if the Key Vault created by CHSS exists in the given region and resource group
             encryption_key_vault_name = generate_name(
                 region, subscription_id, resource_group_name)
             encryption_key_vault = self.check_key_vault(
                 keyvault_client,
                 region,
                 encryption_key_vault_name,
                 resource_group_name,
             )
             if encryption_key_vault is None:
                 # If the Key Vault does not exists, create Key Vault
                 encryption_key_vault = self.create_key_vault(
                     keyvault_client,
                     resource_group_name,
                     encryption_key_vault_name,
                     region,
                     tenant_id,
                     app_details.value,
                     stg_account.identity.principal_id,
                 )
                 # Create a key to encrypt the Storage Account
                 key = self.create_key(credentials,
                                       encryption_key_vault_name,
                                       stg_account.name)
                 # Encrypt the Storage Account using the above Key
                 self.update_storage_account_encryption(
                     storage_client,
                     resource_group_name,
                     stg_name,
                     key.name,
                     encryption_key_vault.properties.vault_uri,
                 )
                 # Create a diagnostic setting to store Key Vault Logs
                 self.create_diagnostic_setting(
                     monitor_client,
                     encryption_key_vault.id,
                     encryption_key_vault.name,
                     stg_account.id,
                     log,
                 )
             else:
                 # Update the key vault access policy to give permissions for both app and storage account.
                 self.update_key_vault_access_policy(
                     keyvault_client,
                     resource_group_name,
                     encryption_key_vault.name,
                     tenant_id,
                     app_details.value,
                     stg_account.identity.principal_id,
                 )
                 # Create a key to encrypt the Storage Account
                 key = self.create_key(credentials,
                                       encryption_key_vault.name,
                                       stg_account.name)
                 # Encrypt the Storage Account using the above Key
                 self.update_storage_account_encryption(
                     storage_client,
                     resource_group_name,
                     stg_account.name,
                     key.name,
                     encryption_key_vault.properties.vault_uri,
                 )
         # Creating Diagnostic settings to store violated Key vault's logs
         self.create_diagnostic_setting(monitor_client, key_vault.id,
                                        key_vault_name, stg_account.id, log)
     except Exception as e:
         logging.error(f"{str(e)}")
         raise
     return 0
示例#11
0
    def ensure_key_with_permission_exists(
        self,
        key_vault_name,
        client_id,
        tenant_id,
        credentials,
        client,
        client_storage,
        keyvault_client,
        graph_client,
        monitor_client,
        resource_group_name,
        sql_server_name,
        region,
        subscription_id,
        principal_id,
        app_object_id,
    ):
        """Ensure that a Key Vault with key created by CHSS exists
        :param client_id: Azure Client ID.
        :param tenant_id: Azure Tenant ID.
        :param graph_client: Instance of the AzureGraphRbacManagementClient.
        :param keyvault_client: Instance of the Azure KeyVaultManagementClient.
        :param monitor_client: Instance of the Azure MonitorClient.
        :param credentials: Azure Credential object.
        :param client: Instance of the Azure SqlManagementClient.
        :param client_storage: Instance of the Azure StorageManagementClient.
        :param resource_group_name: The name of the resource group to which the SQL Server belongs.
        :param sql_server_name: The name of the SQL Server.
        :param subscription_id: Azure Subscription Id
        :param principal_id: SQL Server Principal Id.
        :param app_object_id: Object Id of the Application that is running the code.
        :type client_id: str
        :type tenant_id: str
        :type graph_client: object
        :type keyvault_client: object
        :type client_storage: object
        :type monitor_client: object
        :type credentials: object
        :type client: object
        :type resource_group_name: str.
        :type sql_server_name: str.
        :type region: str.
        :type subscription_id: str
        :type principal_id: str.
        :type app_object_id: str.
        :returns: Integer signaling success or failure
        :rtype: int
        :raises: msrestazure.azure_exceptions.CloudError
        """
        # Check if the Key Vault created by CHSS exists in the given region and resource group.
        key_vault = self.check_key_vault(
            keyvault_client, region, key_vault_name, resource_group_name
        )
        if key_vault is None:
            # If the Key Vault does not exists then create the Key Vault.
            key_vault = self.create_key_vault(
                keyvault_client,
                resource_group_name,
                key_vault_name,
                region,
                tenant_id,
                app_object_id,
                principal_id,
            )
            log = LogSettings(
                category="AuditEvent",
                enabled=True,
                retention_policy=RetentionPolicy(enabled=True, days=180),
            )

            # Check if the Storage Account created by CHSS exists in the given region and resource group.
            stg_name = generate_name(region, subscription_id, resource_group_name)
            stg_account = self.check_stg_account(
                client_storage, region, stg_name, resource_group_name
            )
            if stg_account is None:
                # If the Storage Account does not exists then create the Storage Account.
                stg_account = self.create_storage_account(
                    resource_group_name, stg_name, region, client_storage
                )

                # Create a Key to encrypt the Storage Account.
                key = self.create_key(credentials, key_vault.name, stg_account.name)
                
                # Update the Access policy for the Key Vault to give access to the Storage Account which is being created.
                self.update_key_vault_access_policy(
                    keyvault_client,
                    resource_group_name,
                    key_vault_name,
                    tenant_id,
                    app_object_id,
                    stg_account.identity.principal_id,
                )
                # Encrypt the Storage Account which is being created with the above Key.
                self.update_storage_account_encryption(
                    client_storage,
                    resource_group_name,
                    stg_name,
                    key.name,
                    key_vault.properties.vault_uri,
                )
            # Create Diagnostic Setting to store key vault logs
            self.create_diagnostic_setting(
                monitor_client, key_vault.id, key_vault.name, stg_account.id, log,
            )
        else:
            # If the Key Vault exists then update the access policy to give access to app and the Storage Account
            self.update_key_vault_access_policy(
                keyvault_client,
                resource_group_name,
                key_vault_name,
                tenant_id,
                app_object_id,
                principal_id,
            )
        # Create a Key to encrypt the Sql Server TDE.
        key = self.create_key(credentials, key_vault_name, sql_server_name)
        return key