Supporting S3 signature version 4

Hey,

I had a problem with not being able to use S3 via Amazon S3 and Cloudfront and it turns out this was because you don’t support V4 authentication (required by the new eu-central-1 region).

Just in case anybody’s wondering, it can be fixed by updating the AWS PHP SDK to the latest version (to support the new region) under ‘vendor’ and by modifying amazon-web-services.php under ‘classes’:

line 192:

$args = array(
		'key'    => $this->get_access_key_id(),
		'secret' => $this->get_secret_access_key(),
                'signature' => 'v4'
		);

So I simply added the ‘signature’ argument. V4 also requires the region to be set, so just set it in your wp-config.php with:

define( 'AWS_REGION', 'eu-central-1' );

I realize this is not really a fix as it forces V4 but it is a temporary fix for anybody using the new region.

Cheers.

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