http://bugs.winehq.org/show_bug.cgi?id=17296
--- Comment #48 from Juan Lang juan_lang@yahoo.com 2009-11-05 16:22:57 --- (In reply to comment #47)
How do I import this certificate for Wine to see and use?
Wine reads the certs from your distro, so you'll have to install it using whatever mechanism is appropriate for your distro. On your system, I think they're installed in /etc/ssl/certs, and they're in PEM format. So if you have a cert in DER format (binary), you'd have to convert it first, e.g.: $ openssl rsa -inform DER -outform PEM -in cert.crt -out cert.pem then copy it to /etc/ssl/certs.
(Maybe Wine should use the Trust store too, but that'd be a different bug.)