Cannot transfer files with AWS4 authentication that have @ in the name

[cyberduck]

9716037 created the issue

Given the following list of files (all copies of one file) and connecting to region eu-central-1:

image.jpg
image@.jpg
image@2.jpg
image@2x.jpg
image2x.jpg

I cannot upload (or download) the following:

image@.jpg
image@2.jpg
image@2x.jpg

The error is:
Upload image@2x.jpg failed.
The request signature we calculated does not match the signature you provided. Check your key and signing method. Please contact your web hosting service provider for assistance.

The same operation in any other S3 region completes without error.

[cyberduck]

9716037 commented

Let me know if I can be of any assistance with this, either access or testing. Cyberduck is the only (reliable) app that can connect to Frankfurt S3, and this issue actually means we can't use it in our workflow currently. We're resorting to uploading via the web console. Many thanks

[cyberduck]

@dkocher commented

In e9fc527.