Storing Encryption Keys for OCI Object Storage Security

Question

Pulumi · Accepted Answer

Encryption keys are essential for securing data at rest, especially when dealing with cloud object storage solutions like Oracle Cloud Infrastructure (OCI) Object Storage. OCI provides Key Management Service (KMS) to manage the lifecycle of your keys, including creation, rotation, and deletion.

In Pulumi, we can automate the process of key management by creating and rotating encryption keys using the OCI provider. Below is a Pulumi program that demonstrates how to create a new Key and KeyVersion in OCI using Pulumi. The Key resource represents a master encryption key that can be used to encrypt your data. The KeyVersion resource is a specific version of a Key that you can use to encrypt and decrypt data.

Here's how you can use Pulumi with OCI to manage encryption keys:

1. Import the necessary Pulumi OCI package.
2. Create a Key by specifying the desired properties such as the algorithm, key length, and purpose.
3. Create a KeyVersion to use with a specific Key when encrypting your Object Storage data.

```python
import pulumi
import pulumi_oci as oci

# Create an OCI KMS Key for encryption
# The `oci.Kms.Key` resource manages a master encryption key in OCI.
key = oci.kms.Key("my-encryption-key",
                  compartment_id=oci.Config().require("compartment_id"),
                  display_name="my-key",
                  key_shape=oci.kms.KeyKeyShapeArgs(
                      algorithm="AES",
                      length=32,
                  ))

# Create a KeyVersion. Key versions are the actual cryptographic material used for encrypting data.
# When you enable automatic key rotation, Oracle creates a new key version at the specified rotation interval,
# and the new key version becomes the current key version for the master encryption key.
key_version = oci.kms.KeyVersion("my-key-version",
                                 key_id=key.id,
                                 management_endpoint=oci.Config().require("management_endpoint"))

# Export the key id and key version id to be used in other parts of your infrastructure,
# such as when configuring OCI Object Storage to use the KeyVersion for server-side encryption.
pulumi.export("key_id", key.id)
pulumi.export("key_version_id", key_version.id)
```

In the program above:

- You define an OCI KMS `Key` for encryption. The key shape indicates you want to use an AES algorithm with a key length of 32 bytes.
- You create a `KeyVersion` which relates to the created key. The KeyVersion is the actual encryption material that will be used.
- You export the `key_id` and `key_version_id`. These can be referenced in other Pulumi scripts or can be used to configure your OCI Object Storage to employ this key for server-side encryption

Please ensure you replace `compartment_id` and `management_endpoint` with your specific OCI compartment ID and KMS management endpoint. You can find these pieces of information in your OCI console or configuration files.

Note: This program assumes that you have set up your OCI provider credentials and the Pulumi configuration for your compartment ID and management endpoint. Make sure you have the Pulumi CLI and appropriate OCI configurations set up before running this program.