[Enhancement]: Support ED25519 and ECDSA keys for Transfer Server

[Sodki]

Description

AWS Transfer Server now supports ED25519 and ECDSA keys for the host servers, besides RSA.

Affected Resource(s) and/or Data Source(s)

aws _transfer_server

Potential Terraform Configuration

No response

References

https://repost.aws/articles/ARTPkMfLZQSQijKgOCdyQpLg/announcing-support-for-multiple-host-keys-and-key-types-for-aws-transfer-family-servers

Would you like to implement a fix?

No response

[github-actions]

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[teddylear]

@ewbankkit @Sodki I can take a look into this if that's alright

[mrLarbi]

I would also add that AWS added the support of multiple host keys (up to 10). Strongly interested in that too (as of now, if I am not mistaken, we can only provide a single key to AWS Transfer Family with Terraform).

[ewbankkit]

The current aws_transfer_server.host_key attribute supports RSA, ECDSA, or ED25519 private keys even though the documentation says only PEM. I'll update that.

The additional keys require a new resource, aws_transfer_host_key.