Support for custom_metadata in `Versioned.Metadata`

[commjoen]

Hi there,
love the Hashicorp Vault support build here! Now I was wondering: can we please have support for the custom_metadata as part of org.springframework.vault.support.Versioned.Metadata? I would love to use that in a challenge we are building at OWASP WrongSecrets (See OWASP/wrongsecrets#719 for more details).

Or is there already another way in which I would be able to retrieve the custom_metadata for a secrets entry?

[mp911de]

Currently, Versioned.Metadata doesn't have a field to hold custom_metadata. You could use the plain read and write API on VaultTemplate to work around this limitation.

It would make sense to extend Metadata with the custom metadata. Feel free to submit a pull request.

[commjoen]

Thank you @mp911de ! I hope to have a look somewhere this month to try to make something out of a first PR.

[commjoen]

Can you please assign the issue to me good sir? So I will not forget about it ;-).

[commjoen]

Sorry for being a bit slower than expected. It looks like the customMetadata in https://developer.hashicorp.com/vault/api-docs/secret/kv/kv-v2 lives next to the versions (so extending VaultMetadataResponse makes more sense i guess :) ?)

[commjoen]

Would the approach in #808 make sense? (or what would you rather prefer me to do instead?)