Azure Key Vault Secret client library for Python Azure SDK for Python 2.0.0 documentation

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Azure Key Vault helps solve the following problems:

Source code | Package (PyPI) | API reference documentation | Product documentation | Samples

Getting started

Install the package

Install the Azure Key Vault Secrets client library for Python with pip:

pip install azure-keyvault-secrets

Prerequisites

  • An Azure subscription

  • Python 2.7, 3.5.3, or later

  • A Key Vault. If you need to create one, you can use the Azure Cloud Shell to create one with these commands (replace "my-resource-group" and "my-key-vault" with your own, unique names):

    • (Optional) if you want a new resource group to hold the Key Vault: .. code-block:: sh

      az group create –name my-resource-group –location westus2

    • Create the Key Vault:

      az keyvault create --resource-group my-resource-group --name my-key-vault

      Output:

      { "id": "...", "location": "westus2", "name": "my-key-vault", "properties": { "accessPolicies": [...], "createMode": null, "enablePurgeProtection": null, "enableSoftDelete": null, "enabledForDeployment": false, "enabledForDiskEncryption": null, "enabledForTemplateDeployment": null, "networkAcls": null, "provisioningState": "Succeeded", "sku": { "name": "standard" }, "tenantId": "...", "vaultUri": "https://my-key-vault.vault.azure.net/" }, "resourceGroup": "my-resource-group", "type": "Microsoft.KeyVault/vaults" }

      The "vaultUri" property is the vault_url used by SecretClient

Authenticate the client

In order to interact with a Key Vault’s secrets, you’ll need an instance of the ``SecretClient` <https://azure.github.io/azure-sdk-for-python/ref/azure.keyvault.secrets.html#azure.keyvault.secrets.SecretClient>`_ class. Creating one requires a vault url and credential. This document demonstrates using DefaultAzureCredential as the credential, authenticating with a service principal’s client id, secret, and tenant id. Other authentication methods are supported. See the azure-identity documentation for more details.

Create a service principal

This Azure Cloud Shell snippet shows how to create a new service principal. Before using it, replace “your-application-name” with a more appropriate name for your service principal.

  • Create a service principal: .. code-block:: Bash

    { "appId": "generated app id", "displayName": "my-application", "name": "http://my-application", "password": "random password", "tenant": "tenant id" }

  • Use the output 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 Bash:

    export AZURE_CLIENT_ID="generated app id" export AZURE_CLIENT_SECRET="random password" export AZURE_TENANT_ID="tenant id"

  • Authorize the service principal to perform key operations in your Key Vault:

    az keyvault set-policy --name my-key-vault --spn $AZURE_CLIENT_ID --key-permissions backup delete get list create

    Possible key permissions:

    • Key management: backup, delete, get, list, purge, recover, restore, create, update, import

    • Cryptographic operations: decrypt, encrypt, unwrapKey, wrapKey, verify, sign

Key concepts

With a SecretClient, you can get secrets from the vault, create new secrets and update their values, and delete secrets, as shown in the examples below.

Secret

A secret consists of a secret value and its associated metadata and management information. For this library secret values are strings, but Azure Key Vault doesn’t store them as such. For more information about secrets and how Key Vault stores and manages them, see the Key Vault documentation .

Examples

This section contains code snippets covering common tasks:

Create a Secret

set_secret creates a secret in the vault. If a secret with the same name already exists, a new version of that secret is created.

secret = secret_client.set_secret("secret-name", "secret-value") print(secret.name) print(secret.value) print(secret.properties.version)

Retrieve a Secret

get_secret retrieves a secret previously stored in the Key Vault.

secret = secret_client.get_secret("secret-name") print(secret.name) print(secret.value)

Update Secret metadata

update_secret updates a secret’s metadata. It cannot change the secret’s value; use ``set_secret` <#create-a-secret>`_ to set a secret’s value.

# Clients may specify the content type of a secret to assist in interpreting the secret data when it's retrieved content_type = "text/plain" # You can specify additional application-specific metadata in the form of tags. tags = {"foo": "updated tag"} updated_secret_properties = secret_client.update_secret_properties("secret-name", content_type=content_type, tags=tags) print(updated_secret_properties.updated_on) print(updated_secret_properties.content_type) print(updated_secret_properties.tags)

Delete a Secret

begin_delete_secret requests Key Vault delete a secret, returning a poller which allows you to wait for the deletion to finish. Waiting is helpful when the vault has soft-delete enabled, and you want to purge (permanently delete) the secret as soon as possible. When soft-delete is disabled, deletion is always permanent.

deleted_secret = secret_client.begin_delete_secret("secret-name").result() print(deleted_secret.name) print(deleted_secret.properties.deleted_date)

List secrets

This example lists all the secrets in the vault. The list doesn’t include secret values; use ``get_secret` <#retrieve-a-secret>`_ to get a secret’s value.

secret_properties = secret_client.list_properties_of_secrets() for secret_property in secret_properties: # the list doesn't include values or versions of the secrets print(secret_property.name)

Async create a secret

This example creates a secret in the Key Vault with the specified optional arguments.

from azure.identity.aio import DefaultAzureCredential from azure.keyvault.secrets.aio import SecretClient credential = DefaultAzureCredential() secret_client = SecretClient(vault_url="https://my-key-vault.vault.azure.net/", credential=credential) secret = await secret_client.set_secret("secret-name", "secret-value") print(secret.name) print(secret.value) print(secret.properties.version)

Async list secrets

This example lists properties of all the secrets in the specified Key Vault. Note that secret values are not included.

secret_properties = secret_client.list_properties_of_secrets() async for secret_property in secret_properties: # the list doesn't include values or versions of the secrets print(secret_property.name)

Troubleshooting

General

Key Vault clients raise exceptions defined in ``azure-core` <https://github.com/Azure/azure-sdk-for-python/blob/master/sdk/core/azure-core/docs/exceptions.md>`_. For example, if you try to get a key that doesn’t exist in the vault, SecretClient raises ResourceNotFoundError:

from azure.core.exceptions import ResourceNotFoundError secret_client.begin_delete_secret("my-secret").wait() try: secret_client.get_secret("my-secret") except ResourceNotFoundError as e: print(e.message)

Logging

Network trace logging is disabled by default for this library. When enabled, HTTP requests will be logged at DEBUG level using the logging library. You can configure logging to print debugging information to stdout or write it to a file:

from azure.identity import DefaultAzureCredential from azure.keyvault.secrets import SecretClient import sys import logging # Create a logger for the 'azure' SDK logger = logging.getLogger('azure') logger.setLevel(logging.DEBUG) # Configure a console output handler = logging.StreamHandler(stream=sys.stdout) logger.addHandler(handler) credential = DefaultAzureCredential() # Enable network trace logging. Each HTTP request will be logged at DEBUG level. client = SecretClient(vault_url="https://my-key-vault.vault.azure.net/", credential=credential, logging_enable=True)

Network trace logging can also be enabled for any single operation:

secret = secret_client.get_secret("secret-name", logging_enable=True)

Next steps

Several samples are available in the Azure SDK for Python GitHub repository. These provide example code for additional Key Vault scenarios:

Contributing

This project welcomes contributions and suggestions. Most contributions require you to agree to a Contributor License Agreement (CLA) declaring that you have the right to, and actually do, grant us the rights to use your contribution. For details, visit https://cla.microsoft.com.

When you submit a pull request, a CLA-bot will automatically determine whether you need to provide a CLA and decorate the PR appropriately (e.g., label, comment). Simply follow the instructions provided by the bot. You will only need to do this once across all repos using our CLA.

This project has adopted the Microsoft Open Source Code of Conduct. For more information, see the Code of Conduct FAQ or contact opencode@microsoft.com with any additional questions or comments.

Impressions

Indices and tables

Developer Documentation

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