open-vault/website/source/docs/configuration/seal/azurekeyvault.html.md

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docs	Azure Key Vault - Seals - Configuration	Azure Key Vault	docs-configuration-seal-azurekeyvault	The Azure Key Vault seal configures Vault to use Azure Key Vault as the seal wrapping mechanism.

azurekeyvault Seal

The Azure Key Vault seal configures Vault to use Azure Key Vault as the seal wrapping mechanism. The Azure Key Vault seal is activated by one of the following:

• The presence of a seal "azurekeyvault" block in Vault's configuration file.
• The presence of the environment variable VAULT_SEAL_TYPE set to azurekeyvault. If enabling via environment variable, all other required values specific to Key Vault (i.e. VAULT_AZUREKEYVAULT_VAULT_NAME, etc.) must be also supplied, as well as all other Azure-related environment variables that lends to successful authentication (i.e. AZURE_TENANT_ID, etc.).

azurekeyvault Example

This example shows configuring Azure Key Vault seal through the Vault configuration file by providing all the required values:

seal "azurekeyvault" {
  tenant_id      = "46646709-b63e-4747-be42-516edeaf1e14"
  client_id      = "03dc33fc-16d9-4b77-8152-3ec568f8af6e"
  client_secret  = "DUJDS3..."
  vault_name     = "hc-vault"
  key_name       = "vault_key"
}

azurekeyvault Parameters

These parameters apply to the seal stanza in the Vault configuration file:

• tenant_id (string: <required>): The tenant id for the Azure Active Directory organization. May also be specified by the AZURE_TENANT_ID environment variable.

• client_id (string: <required or MSI>): The client id for credentials to query the Azure APIs. May also be specified by the AZURE_CLIENT_ID environment variable.

• client_secret (string: <required or MSI>): The client id for credentials to query the Azure APIs. May also be specified by the AZURE_CLIENT_ID environment variable.

• environment (string: "AZUREPUBLICCLOUD"): The Azure Cloud environment API endpoints to use. May also be specified by the VAULT_AZUREKEYVAULT_VAULT_NAME environment variable.

• vault_name (string: <required>): The Key Vault vault to use the encryption keys for encryption and decryption. May also be specified by the VAULT_AZUREKEYVAULT_KEY_NAME environment variable.

• key_name (string: <required>): The Key Vault key to use for encryption and decryption. May also be specified by the VAULT_AZUREKEYVAULT_KEY_NAME environment variable.

Authentication

Authentication-related values must be provided, either as environment variables or as configuration parameters.

Azure authentication values:

* `AZURE_TENANT_ID`
* `AZURE_CLIENT_ID`
* `AZURE_CLIENT_SECRET`
* `AZURE_ENVIRONMENT`

Note: If Vault is hosted on Azure, Vault can use Managed Service Identities (MSI) to access Azure instead of an environment and shared client id and secret. MSI must be enabled on the VMs hosting Vault.

azurekeyvault Environment Variables

Alternatively, the Azure Key Vault seal can be activated by providing the following environment variables:

* `VAULT_AZUREKEYVAULT_VAULT_NAME`
* `VAULT_AZUREKEYVAULT_KEY_NAME`

Key Rotation

This seal supports rotating keys defined in Azure Key Vault. Key metadata is stored with the encrypted data to ensure the correct key is used during decryption operations.