[openssl-users] Certificate serialnumber?

Salz, Rich rsalz at akamai.com
Sun Jul 5 15:56:15 UTC 2015

> > the question: where does the serial number for this certificate come from?
> > is it random by default when nothing is said about it?

It will be random if (a) the serial file does not exist; and (b) you specify the -create_serial flag.  Otherwise it opens the file, reads the number (defaulting to zero if not exists) and increments it, updates the file, and uses that as the new serial number.

More information about the openssl-users mailing list