How would you create a random Mac UUID?

[CKingX]

I see a Version::Mac and UUID Builder, but you would have to provide the bytes. Is it possible to use say new_v1() (to get the UUID and convert it to bytes and use those bytes in the builder) or do we get random bytes ourselves and then pass it to the Builder?

[KodrAus]

Hi @CKingX 👋

You should be able to use a library like rand to generate a random [u8; 6] array, and then pass that to Uuid::new_v1. It kind of sounds like you might really be after is a V7 UUID, but we don't support those yet 🙂

[CKingX]

Thank you! I was just wondering how to create any of these UUIDs for ruuhid:

• Mac
• Dce
• Md5

Since the only reference to Mac UUID was in the Version enum, and Version enum itself mentioned Mac is a version 1 UUID, I thought it would be a version 1 UUID. I will be reading up more on the different kinds of UUIDs

[KodrAus]

I think the ruuhid utility is still mostly stubbed at this stage, so it only supports generating random (v4) UUIDs. The uuid library itself has features and methods for:

• v1: MAC
• v3: MD5
• v4: Random
• v5: SHA1

The notable omission there is v2 (DCE) support since RFC4122 doesn't actually specify how to generate them.