[openssl-users] Personal CA: are cert serial numbers critical?

Salz, Rich rsalz at akamai.com
Wed Aug 16 21:01:40 UTC 2017

> There’s no such requirement. It MUST be at most 20 octets long.
    >> - Serial numbers contain cryptographically strong random bits, currently at
    >> least 64 random bits, though it is best if the entire serial number looks
    >> random from the outside.  This is not implemented by the openssl ca program.

Edit apps/apps.h to change SERIAL_RAND_BITS and use the –create_serial flag.

I’ll be making a patch to do this more easily for master.

>Use of the commonName attribute has been deprecated long ago.
 >   Where is this documented?
RFC 2818 in 2000.  See aslo  https://groups.google.com/a/chromium.org/forum/#!topic/security-dev/IGT2fLJrAeo

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