[Libvir] [PATCH] Remote 3/8: Client-side
markmc at redhat.com
Mon May 14 13:16:34 UTC 2007
On Mon, 2007-05-14 at 14:04 +0100, Richard W.M. Jones wrote:
> Mark McLoughlin wrote:
> > 1) Validate the cert was issued by a trusted CA, deny if no
> > 2) Ignore the IP address of client
> > 3) First check whether the cert fingerprint is on the list of allowed
> > client fingerprints, allow if yes
> > 4) Otherwise check whether the contents of the SubjectName name field
> > is on the list of allowed client SubjectNames, allow if yes, deny
> > if no
> > Postfix does (3), but not (4). Apache does (4), in a fairly fancy way,
> > but not (3).
> My reading of:
> The Postfix list manipulation routines give special treatment to
> whitespace and some other characters, making the use of certificate
> names impractical. Instead we use the certificate fingerprints as they
> are difficult to fake but easy to use for lookup.
> ... is that Postfix would do (4), but does (3) because of a shortcoming
> in its configuration file format.
Ah, that explains it.
> (I read "certificate name" to mean DN).
Just to be pedantic:
+ Subject Name : the field in X.509 certs which details the identity
of the holder of the associated private key
+ Distinguished Name : the X.500 format for describing identity which
should be used in the Subject Name field
+ Common Name : one of the possible fields in a Distinguished Name
> We don't have that problem.
Nope, we don't. A list of allowed subject names would be fine for us. I
do like the option of a list of fingerprints too, but it's not that
important if we have the subject name list. And we could also have the
"allow all clients with valid certs" option.
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