Cannot list KMS keys when using IAM Cross Account Roles

[cyberduck]

b0c4c67 created the issue

I'm trying to use Cyberduck with cross account roles and KMS encryption. When I go to the bucket info to set the encryption key, I get a response of "unknown" in the drop down. See https://www.evernote.com/l/ADWy3EPIlTFDt5XkrjMW2lOfwNCABQVf2Eg. Along with this I'm getting an error of "Unknown application error. Secret key cannot be null." The error feels related, but I'm not sure.

If I create an IAM user in the AWS account that has identical permissions to the role assumed, I'm able to see the keys. See https://www.evernote.com/l/ADWXNccmWJ9DU7CzpTFWwNL_j-PRu5RXVCU

[cyberduck]

@ylangisc commented

In 656a031.