In my httpd.conf:

If I have my virtual host configured as:

NameVirtualHost *:80

<VirtualHost *:80>
    ServerName foo.com
    ServerAlias www.foo.com
    Include conf.d/foo.conf
</VirtualHost>

<VirtualHost *:80>
    ServerName bar.com
    ServerAlias www.bar.com
    Include conf.d/bar.conf
</VirtualHost>

Can I get by with a single domain SSL certificate or must I purchase a wildcard SSL certificate to handle the www subdomain?

I am now trying to configure the ssl.conf file, can I use name-based vhosts in my ssl.conf file like this:

NameVirtualHost *:443

<VirtualHost *:443>
    ServerName foo.com
    ServerAlias www.foo.com
    ...
    Include conf.d/foo.conf
</VirtualHost>

<VirtualHost *:443>
    ServerName bar.com
    ServerAlias www.bar.com
    ...
    Include conf.d/bar.conf
</VirtualHost>

or do I need IP based vhosts? If this is possible, what kind of cert would I need in order to do this?