S/MIME X509 certificate requirements for Thunderbird 60.x

Kai Engert <[email protected]>
Newsgroups gmane.comp.mozilla.crypto
Message-ID <[email protected]>
On 22.11.18 17:38, [email protected] wrote:
> Now, I want to import a certificate, originally created by our company PKI as SSL-Client certificate for use with Cisco Anyconnect VPN clients.
> 
> I realized that it differs in its DN format, misses explicit mail sing/encryption flags and has additional subject alternative names. 
> 
> Two of my company email addresses are contained as 
> 
>   1. "Subject: CN = <myuid>@<companydomain>" 
>   2."X509v3 Subject Alternative Name: DNS:vpn.<companydomain>, email:<myemailname>@<companydomain>
> 
> I was trying to figure out why Thunderbird refuses to accept this cert for use with either

How did you learn that TB refused it?

In account settings, security tab (not openpgp security tab), if you
click a select button, does TB offer you to use that certificate?

If it isn't offered, your certificate doesn't have the properties that
TB expects. It would be helpful to see a full dump of the properties of
your certificate. Does it include a certificate key usage extension that
allows both digital signature and data encipherment?

Kai
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