Writing Vault plugins in languages other than Golang

[John]

Is it possible to write Vault plugins in a language other than Golang?  

What needs to be done and is there a worked example somewhere (other than the Golang example here)? Is there an example using Rust?

[Brian Kassouf]

Hi John,

Yes it is possible, though it wont be super straight forward since we
only offer a framework library for golang and I don't know of any
plugins written in other languages. We use gRPC communications for our
plugins and so you'll need to implement the services defined here:

https://github.com/hashicorp/vault/blob/master/logical/plugin/pb/backend.proto
https://github.com/hashicorp/go-plugin/blob/master/grpc_broker.proto

Checkout our framework library for a better understanding of how they
implement the protocol:

https://github.com/hashicorp/vault/tree/master/logical/plugin
https://github.com/hashicorp/vault/tree/master/logical/framework

Hope this helps,

Brian

On Sun, Jul 22, 2018 at 7:39 AM John <john_...@hotmail.com> wrote:
>
> Is it possible to write Vault plugins in a language other than Golang?
>
> What needs to be done and is there a worked example somewhere (other than the Golang example here)? Is there an example using Rust?
>

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