Daml

Rotate the envelope wrapper key

Some KMS providers (e.g., AWS) offer automatic rotation of symmetric KMS keys (typically yearly). Canton extends this by allowing node administrators to manually rotate the KMS wrapper key.

Note

You can change the key specification (e.g., enabling multi-region in AWS) during rotation by updating the configuration before rotating the wrapper key.

Key rotation does not delete the previous key. While the old key becomes inactive, it is still persisted. To permanently delete the previous key, see Delete Canton node keys.

Rotate with an auto-generated key

Use the following command:

participant1.keys.secret.rotate_wrapper_key()

Canton will automatically create a new wrapper key using the configured KMS.

Rotate with a manually generated key

First, you must create a new wrapper key in your KMS that meets the requirements described here. Afterwards, you can rotate to that key using the following command:

participant1.keys.secret.rotate_wrapper_key(newWrapperKeyId)

newWrapperKeyId: the identifier of the wrapper key you want to rotate to.

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