How do I verify the integrity of the setup.exe binary?

How do I verify the integrity of the setup.exe binary?

[Kasper Dupont]

I wanted to install Cygwin on one machine, but I got stuck
trying to figure out how to verify the integrity of the
downloaded setup.exe binary.

The documentation points at a signature file and public key
file hosted on the same webserver as setup.exe. Thus those
could be tampered with just as easily as setup.exe itself.

If I knew how to get the public key from a secure source, I
know how to use gpg to validate the signature. I would have
expected the public key to be available over https as well,
but I wasn't able to find it anywhere.

I looked through the FAQ, but this question did not appear
to have been addressed there.

-- 
Kasper Dupont -- Rigtige mænd skriver deres egne backupprogrammer
#define _(_)"d.%.4s%."_"2s" /* This is my email address */
char*_="@2kaspner"_()"%03"_("4s%.")"t\n";printf(_+11,_+6,_,11,_+2,_+7,_+6);

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