Developer question on sign tools

Some of the users of my Addon Sync Tool are asking to include signing/signature checking features.

I think i could achieve this by including DSCheckSignatures.exe and DSsignfile.exe and create some kind of .Net wrapper around them.

The problem i face is: am i legally  allowed to do this?

I could of course have the users download the tools manually and include some kind of "install function", but if possible it would save a whole lot of hassle (and possibly win over some more player's/admin's hearts) if i could simply bundle them in.

So here it goes: can i or can i not bundle your sign tools?

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