The current repo's BLS expand_message_xof was designed before the hash-to-curve RFC 9380 or its previous draft versions became available.
Although the design follows the requirements of a variant expand message, it resulted in a specific design that is different than what is used by BLS other open source libraries.
Users of the lib can define any other expand-to-message implementation as a Hasher used by the BLS signing interface, but it would be good if the package supports the more standard designs.
Issue to be solved
The current repo's BLS
expand_message_xofwas designed before the hash-to-curve RFC 9380 or its previous draft versions became available. Although the design follows the requirements of a variant expand message, it resulted in a specific design that is different than what is used by BLS other open source libraries.Users of the lib can define any other expand-to-message implementation as a
Hasherused by the BLS signing interface, but it would be good if the package supports the more standard designs.Definition of done:
HHSuggested Solution
No response