Certificate with multiple CN fields - valid?

2010-06-02 Thread John Nagle
Normally, when a certificate is to be valid for more than one domain name, one name is in the CN field, and the others are in the subjectAltName extension. But look at the cert for https://www.ipmirror.com/;. It has CN = admincms.ipmirror.com CN = business.ipmirror.cn CN =

Re: Certificate with multiple CN fields - valid?

2010-06-02 Thread Konrads Smelkovs
Valid is whatever browser understands. As X.509 is/was related to LDAP, then having multiple cn's in an entry is a no-no. -- Konrads Smelkovs Applied IT sorcery. On Wed, Jun 2, 2010 at 5:23 AM, John Nagle na...@sitetruth.com wrote: Normally, when a certificate is to be valid for more than

Re: Certificate with multiple CN fields - valid?

2010-06-02 Thread Willy Weisz
In order to be valid for the authentication of multiple DNS names an X.509 certificate has to have them included in the subjAlternativeName entry not in multiple CN entries in the subjectName. The latter represents a single entity with potentially multiple CN entries, not multiple entities each

Re: Certificate with multiple CN fields - valid?

2010-06-02 Thread Michael Ströder
John Nagle wrote: Normally, when a certificate is to be valid for more than one domain name, one name is in the CN field, and the others are in the subjectAltName extension. But look at the cert for https://www.ipmirror.com/;. This might serve as an interesting example for the people