Correctly use the KDFs
Created by: claucece
As we are currently implementing the revision number 2 of the OTRv4 specification, we need to include a consistent way of using KDFs.
Please, refer to the "Key Derivation Functions" section of the OTRv4 spec.
KDF_1on the library.
- Check that we use a correct usageID for each time a KDF is used, as defined on the spec.
- Should we use "OTRv4" as the domain separation for the function?