On Tue, Oct 21, 2014 at 04:17:25PM -0700, lists@xxxxxxxxxxxxxxxxxx wrote:
> I've already confirmed for example, that using openssl s_client as you mention
> above doesn't actually check the certs, just lists them.
Actually it does check them as well.
e.g.
openssl s_client -connect localhost:443 < /dev/null > /dev/null
depth=0 /C=--/ST=SomeState/L=SomeCity/O=SomeOrganization/OU=SomeOrganizationalUnit/CN=a.example.com/emailAddress=root@xxxxxxxxxxxxx
verify error:num=18:self signed certificate
verify return:1
depth=0 /C=--/ST=SomeState/L=SomeCity/O=SomeOrganization/OU=SomeOrganizationalUnit/CN=a.example.com/emailAddress=root@xxxxxxxxxxxxx
verify error:num=10:certificate has expired
notAfter=Aug 9 23:55:39 2014 GMT
verify return:1
depth=0 /C=--/ST=SomeState/L=SomeCity/O=SomeOrganization/OU=SomeOrganizationalUnit/CN=a.example.com/emailAddress=root@xxxxxxxxxxxxx
notAfter=Aug 9 23:55:39 2014 GMT
verify return:1
DONE
Notice the "verify error" lines; it's both self-signed _and_ expired.
In chained certs it'll check each of the chains.
e.g.
openssl s_client -connect www.google.com:443 < /dev/null > /dev/null
CONNECTED(00000003)
depth=3 /C=US/O=Equifax/OU=Equifax Secure Certificate Authority
verify return:1
depth=2 /C=US/O=GeoTrust Inc./CN=GeoTrust Global CA
verify return:1
depth=1 /C=US/O=Google Inc/CN=Google Internet Authority G2
verify return:1
depth=0 /C=US/ST=California/L=Mountain View/O=Google Inc/CN=www.google.com
verify return:1
---
Certificate chain
0 s:/C=US/ST=California/L=Mountain View/O=Google Inc/CN=www.google.com
i:/C=US/O=Google Inc/CN=Google Internet Authority G2
1 s:/C=US/O=Google Inc/CN=Google Internet Authority G2
i:/C=US/O=GeoTrust Inc./CN=GeoTrust Global CA
2 s:/C=US/O=GeoTrust Inc./CN=GeoTrust Global CA
i:/C=US/O=Equifax/OU=Equifax Secure Certificate Authority
You can do a _LOT_ with the openssl command line (e.g. show all the
intermediate certs in detail with -showcerts). 'man s_client'
If you have a server with a broken intermediate chain then run the command
and see what it returns.
--
rgds
Stephen
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