subtle-derive

A set of derive macros for subtle traits:

• #[derive(ConstantTimeEq)]: Implement equality by &=ing the .ct_eq() of every pair of fields.
• #[derive(ConstantTimeGreater)]: Implement comparison in a more complex way by using .ct_eq() and .ct_gt() on each pair of fields.

TODO: Upstream patches required

This derive macro requires:

• the ConstantTime{Partial,}Ord traits from dalek-cryptography/subtle#98 to exist
• the Iterated{Eq,Less,Greater} structs from dalek-cryptography/subtle#99 to exist

so it depends on the integration branch of https://github.com/cosmicexplorer/subtle in its dev-dependencies for now.

License

BSD 3 Clause, to match the license of subtle.