open-vault/website/content/docs/configuration/seal/ocikms.mdx

---
layout: docs
page_title: OCI KMS - Seals - Configuration
description: |-
  The OCI KMS seal configures Vault to use OCI KMS as the seal wrapping
  mechanism.
---

# `ocikms` Seal

-> **Note:** The Seal Wrap functionality is enabled by default. For this reason, the KMS service must be available throughout Vault's runtime and not just during the unseal process. Refer to the [Seal Wrap](/docs/enterprise/sealwrap) documenation for more information.

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

- The presence of a `seal "ocikms"` block in Vault's configuration file
- The presence of the environment variable `VAULT_SEAL_TYPE` set to `ocikms`. If
  enabling via environment variable, all other required values specific to OCI
  KMS (i.e. `VAULT_OCIKMS_SEAL_KEY_ID`, `VAULT_OCIKMS_CRYPTO_ENDPOINT` `VAULT_OCIKMS_MANAGEMENT_ENDPOINT`) must be also supplied, as well as all
  other OCI-related [environment variables][oci-sdk] that lends to successful
  authentication.

## `ocikms` Example

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

```hcl
seal "ocikms" {
    key_id               = "ocid1.key.oc1.iad.afnxza26aag4s.abzwkljsbapzb2nrha5nt3s7s7p42ctcrcj72vn3kq5qx"
    crypto_endpoint      = "https://afnxza26aag4s-crypto.kms.us-ashburn-1.oraclecloud.com"
    management_endpoint  = "https://afnxza26aag4s-management.kms.us-ashburn-1.oraclecloud.com"
    auth_type_api_key    = "true"
}
```

## `ocikms` Parameters

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

- `key_id` `(string: <required>)`: The OCI KMS key ID to use. May also be
  specified by the `VAULT_OCIKMS_SEAL_KEY_ID` environment variable.
- `crypto_endpoint` `(string: <required>)`: The OCI KMS cryptographic endpoint (or data plane endpoint)
  to be used to make OCI KMS encryption/decryption requests. May also be specified by the `VAULT_OCIKMS_CRYPTO_ENDPOINT` environment
  variable.
- `management_endpoint` `(string: <required>)`: The OCI KMS management endpoint (or control plane endpoint)
  to be used to make OCI KMS key management requests. May also be specified by the `VAULT_OCIKMS_MANAGEMENT_ENDPOINT` environment
  variable.
- `auth_type_api_key` `(boolean: false)`: Specifies if using API key to authenticate to OCI KMS service.
  If it is `false`, Vault authenticates using the instance principal from the compute instance. See Authentication section for details. Default is `false`.

- `disabled` `(string: "")`: Set this to `true` if Vault is migrating from an auto seal configuration. Otherwise, set to `false`.

Refer to the [Seal Migration](/docs/concepts/seal#seal-migration) documentation for more information about the seal migration process.

## Authentication

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

If you want to use Instance Principal, add section configuration below and add further configuration settings as detailed in the [configuration docs](/docs/configuration/).

```hcl
seal "ocikms" {
    crypto_endpoint     = "<kms-crypto-endpoint>"
    management_endpoint = "<kms-management-endpoint>"
    key_id              = "<kms-key-id>"
}
# Notes:
# crypto_endpoint can be replaced by VAULT_OCIKMS_CRYPTO_ENDPOINT environment var
# management_endpoint can be replaced by VAULT_OCIKMS_MANAGEMENT_ENDPOINT environment var
# key_id can be replaced by VAULT_OCIKMS_SEAL_KEY_ID environment var
```

If you want to use User Principal, the plugin will take the API key you defined for OCI SDK, often under `~/.oci/config`.

```hcl
seal "ocikms" {
    auth_type_api_key   = true
    crypto_endpoint     = "<kms-crypto-endpoint>"
    management_endpoint = "<kms-management-endpoint>"
    key_id              = "<kms-key-id>"
}
```

To grant permission for a compute instance to use OCI KMS service, write policies for KMS access.

- Create a [Dynamic Group][oci-dg] in your OCI tenancy.
- Create a policy that allows the Dynamic Group to use or manage keys from OCI KMS. There are multiple ways to write these policies. The [OCI Identity Policy][oci-id] can be used as a reference or starting point.

The most common policy allows a dynamic group of tenant A to use KMS's keys in tenant B:

```text
define tenancy tenantB as <tenantB-ocid>

endorse dynamic-group <dynamic-group-name> to use keys in tenancy tenantB

```

```text
define tenancy tenantA as <tenantA-ocid>

define dynamic-group <dynamic-group-name> as <dynamic-group-ocid>

admit dynamic-group <dynamic-group-name> of tenancy tenantA to use keys in compartment <key-compartment>

```

## `ocikms` Rotate OCI KMS Master Key

For the [OCI KMS key rotation feature][oci-kms-rotation], OCI KMS will create a new version of key internally. This process is independent from Vault, and Vault still uses the same `key_id` without any interruption.

If you want to change the `key_id`: migrate to Shamir, change `key_id`, and then migrate to OCI KMS with the new `key_id`.

[oci-sdk]: https://docs.cloud.oracle.com/iaas/Content/API/Concepts/sdkconfig.htm
[oci-dg]: https://docs.cloud.oracle.com/iaas/Content/Identity/Tasks/managingdynamicgroups.htm
[oci-id]: https://docs.cloud.oracle.com/iaas/Content/Identity/Concepts/policies.htm
[oci-kms-rotation]: https://docs.cloud.oracle.com/iaas/Content/KeyManagement/Tasks/managingkeys.htm