Addition of X.509 authentication to the Database


Proposal: 

To add an X509 authentication type to the "auth:" attribute.
Attributes with this type will use the Distinguished Name (DN) of the
certificate to identify it.


Motivation:

X.509 allows a single authentication method to work for both e-mail
and the web.  LIRs can receive an X.509 certificate through the LIR
Portal, and should be able to use this to update records they control
in the Database.  X.509 is "strong", like PGP, although a different
trust model is used.


Details:

The "auth:" attribute of the mntner class will have a new
authentication scheme, X509.  The DN, as defined in RFC 2253, will be
used to identify the specific certificate used.

Note that there is no key-cert object for the X509 scheme.  Instead,
the certificate must be signed by a trusted authority.  The trusted
authority will be the RIPE NCC Certificate Authority (CA) that is
currently only available to LIRs.  It is possible to configure
additional CAs in future, should this become desirable.  For instance,
existing commercial CAs could be allowed, or the RIPE NCC could create
a CA to issue certificates to non-LIRs for this purpose only.

Below is an example of a maintainer with X.509 authentication:

mntner:       EXAMPLE-MNT
descr:        Sample maintainer for example.
admin-c:      SWK1-RIPE
tech-c:       RD132-RIPE
tech-c:       HOHO-RIPE
upd-to:       ripe-dbm@ripe.net
mnt-nfy:      ripe-dbm@ripe.net
auth:         X509 C=NL, O=RIPE NCC, OU=Members, CN=zz.example.user1
auth:         X509 C=NL, O=RIPE NCC, OU=Members, CN=zz.example.user2
notify:       ripe-dbm@ripe.net
mnt-by:       EXAMPLE-MNT
referral-by:  RIPE-DBM-MNT
changed:      ripe-dbm@ripe.net 20030813
source:       RIPE


Usage:

E-mail updates for objects maintained by a maintainer with X509
authentication must be sent in S/MIME format and signed (not
encrypted) using the private key associated with the issued
certificate.

Synchronous updates for objects maintained by a maintainer with X509
authentication must use an SSL connection using the private key from
the issued certificate on the client side.

Web updates for objects maintained by a maintainer with X509
authentication can use a browser with the certificate loaded.  The web
updates screens will allow users to specify that they want to identify
themselves using the client-side private key, over an SSL connection.