[chrj]

If you have the private key, you can decrypt it in Wireshark.

[nly]

Inaccurate. Most browsers will now be using ephemeral key exchange. You pretty much have to configure one of the end points to dump session keys to a log file, then load that in to wireshark alongside the packet dump.

[amelius]

It would be nice if there was some automated way to do this.