S3 presigned URL fails when deployed to Elastic Beanstalk

Question

I'm trying to use a presigned URL to upload files to S3. It works fine in my testing enviroment, but when I try and use the same code in the live environment (on elastic beanstalk) it returns an "AccessDenied" error.

I notice that the live request has completely different parameters, though the code is the same. On localhost I have:

X-Amz-Expires, X-Amz-Algorithm, X-Amz-Credential, X-Amz-Date, X-Amz-SignedHeaders, X-Amz-Signature

On live I have:

AWSAccessKeyId, Expires,x-amz-security-token, Signature

Answer 1

I determined the issue. I hadn't authenticated the live servers, but had done so on our own machines.