Force V4 authorization for us-east-2

[LorneFlindall]

Using libs3 in us-east-1, us-west-1 and 2 work for us, but us-east-2 fails. We get Error: S3 Copy Failed : The authorization mechanism you have provided is not supported. Please use AWS4-HMAC-SHA256.

Is there a way to force V4 authorization for these newer regions.
The following regions don't support Signature Version 2. You must use Signature Version 4 to sign API requests in these regions:

US East (Ohio) Region
Canada (Central) Region
Asia Pacific (Mumbai) Region
Asia Pacific (Seoul) Region
EU (Frankfurt) Region
EU (London) Region
China (Beijing) Region

[aghiles]

Make sure you are you are correctly setting the bucket_context.authRegion (in your case, set it to "us-east-2"). Not setting that member will cause these kind of errors in V4 environments.