S3Store is a storage module that uses Amazon's S3 object storage as a storage interface for CertMagic.
The NewS3Storage(bucket, region string) function will automatically use credentials from ENV vars, ~/.aws/credentials files and any assumed roles.
It should not be necessary to provide any explicit credentials.
Otherwise, if you want to provide explicit credentials, you can do so with NewS3StorageWithCredentials(accessKey, secretKey, bucket, region string).
This library is distributed under the MIT License, see LICENSE for more information.