Page MenuHomeFreeBSD

Use G_ELI_IVKEYLEN as the size of IV in the user test code.
ClosedPublic

Authored by jhb on Jan 13 2022, 9:28 PM.

Details

Summary

IVs are not the size of keys as a general case. Most often they are
the size of a single block.

Sponsored by: The FreeBSD Foundation

Diff Detail

Repository
rG FreeBSD src repository
Lint
Automatic diff as part of commit; lint not applicable.
Unit
Automatic diff as part of commit; unit tests not applicable.

Event Timeline

jhb requested review of this revision.Jan 13 2022, 9:28 PM

Do you need a kassert G_ELI_IVKEYLEN >= keysize?

This revision is now accepted and ready to land.Jan 13 2022, 9:51 PM
In D33885#766236, @imp wrote:

Do you need a kassert G_ELI_IVKEYLEN >= keysize?

No, the entire point is that IV sizes have no relation to key sizes. For the ciphers involved in fact, the key sizes are generally larger than the IVs (e.g. 8 byte IV for AES-XTS vs a 256/512 bit key).