OptionalcaOptionalcaOptionalcaOptionalcertOptionalcertOptionalclientOptionalclientOptionalclientOptionalclientOptionaldaysOptionalhostOptionalopensslOptionalportOptionalserverOptionalserverOptionalserverOptionalserverOptionalsizeOptionalvalid
the size of the private key to generate in bits. This must be the last option specified. The default is 2048.