TLSA Validation Failed

[Viktor Dukhovni]

On Mon, Jul 13, 2015 at 09:04:34PM +0000, Abdelmeniem Tharwat wrote:

> And when I try to execute dig @8.8.8.8 _443._tcp.xn----ymcadjpj1at5o.xn--wgbh1c +dnssec TLSA,
> I got the TLSA record that is identical to the hash from crt file.

Both are wrong.

> The TLSA validator said that :-
> 
> [cid:image008.jpg at 01D0BDC0.1A30F150]
> 
> any advice !!!

The correct "3 0 1" TLSA for your server is:

    _443._tcp.xn----ymcadjpj1at5o.xn--wgbh1c. TLSA 3 0 1 AD562370D03DFBE4EDFC4780A2367C8FD086D8A00D53A80D8EC6A8909D50DA9A

What you've published is:

    _443._tcp.xn----ymcadjpj1at5o.xn--wgbh1c. TLSA 3 0 1 1A70DF05AC43318AB35A16542A8736D077ACE3126FAFE00508EDD7484F293C6C

No idea what that is the digest of, but it is not the digest of
the DER form of the server certificate.

-- 
	Viktor.