Not too sure you can rely on Chocolatey to be direct..? Last time I installed WinDirStat using Chocolatey it got the install file from Sourceforge (over an unencrypted HTTP connection)
It links to official installers which are sometimes on SourceForge, but uses installer switches to set options to deselect crapware, do silent install, etc.
http://imgur.com/fajFMUA