Base64 decoding in JCasC

[amoutaux]

What feature do you want to see added?

The JCasC offers the base64 and decodeBase64 helpers that can be applied to a secret prior to use, but they are not applicable here. Also, the secretBytes of a file Credential are automatically base64-decoded before being passed to a pipeline.

When migrating to hashicorp-vault-plugin (say from file Credential to vaultFileCredentialImpl), there is no way to retrieve the same behavior. A base64-encoded file that lies in Vault cannot be passed to a pipeline decoded already which forces us to modify the way pipelines handle such Credentials.

Did I miss anything ?

Thanks a lot

Upstream changes

No response