[CentOS] https and self signed

Fri Jun 17 15:59:45 UTC 2016
Valeri Galtsev <galtsev at kicp.uchicago.edu>

On Fri, June 17, 2016 9:56 am, Michael H wrote:
> On 17/06/16 15:46, James B. Byrne wrote:
>> On Thu, June 16, 2016 13:53, Walter H. wrote:
>>> On 15.06.2016 16:17, Warren Young wrote:
>>>>  but it also affects the other public CAs: you can’t get a
>>>> publicly-trusted cert for a machine without a publicly-recognized and
-visible domain name.  For that, you still need to use
>>>> self-signed certs or certs signed by a private CA.
>>> A private CA is the same as self signed;
>> No it is not.  A private CA is as trustworthy as the organisation that
operates it.  No more and not one bit less.
>> We operate a private CA for our domain and have since 2005.  We
maintain a public CRL strictly in accordance with our CPS and have our
own OID assigned.  Our CPS and CRL together with our active, expired
and revoked certificate inventory is available online at
>> ca.harte-lyne.ca.  Our CPS states that we will only issue certificates
for our own domain and furthermore we only issue them for equipment and
personnel under our direct control.
>> In a few years DANE is going to destroy the entire market of 'TRUSTED'
root CA's  -- because really none of them are trust 'worthy' --.  And
that development is long overdue.  When we reach that point many
domains, if not most, will have their DNS forward zones providing TLSA
RRs for their domain CA certificates and signatures.  And most of those
that do this are going to be running their own private CA's simply to
maintain control of their certificates.
>> Our DNS TLSA flags tell those that verify using DANE that our private
CA is the only authority that can issue a valid certificate for
harte-lyne.ca and its sub-domains.  Compare that to the present case
wherein any 'trusted' CA can issue a certificate for any domain
whatsoever; whether they are authorised by the domain owner or not[1].
>>  So in a future with DANE it will be possible to detect when an
>> apparently 'valid' certificate is issued by a rogue CA.
>> The existing CA structure could not have been better designed for
exploitation by special interests.  It has been and continues to be so
>> Personally I distrust every one of the preloaded root CAs shipped with
Firefox by manually removing all of their trust flags. I do the same
with any other browser I use.  I then add back in those trusts
>> essential for my browser operation as empirical evidence warrants. So I
must trust certain DigiCert certificates for GitHub and
>> DuckDuckGo, GeoTrust for Google, COMODO for Wikipedia, and so forth.
These I set the trust flags for web services only.  The rest can go
pound salt as we used to say.
>> [1]
>> https://nakedsecurity.sophos.com/2013/12/09/serious-security-google-finds-fake-but-trusted-ssl-certificates-for-its-domains-made-in-france/
> https://harte-lyne.ca/

Michael, no offense intended, but I really would suggest to do some
reading instead of quoting what web browser tells you here. James gives
excellent explanations, and all of them are extremely instructive. But one
really needs to do a bit of reading to follow them. In a nut shell: what
James described is exactly as the CA authorities operate with slight
difference: propagation of private CA trust to clients.

Again, please, do some reading on the subject and then re-read what James
posted. Please, do not take it as offense, James' write up is really
instructive, everyone of us who ever run own Certification Authority will
attest to that.


Valeri Galtsev
Sr System Administrator
Department of Astronomy and Astrophysics
Kavli Institute for Cosmological Physics
University of Chicago
Phone: 773-702-4247