fix(curves): correct nb_scalar_bits calculation in WeierstrassParameters#463
Merged
eigmax merged 2 commits intoProjectZKM:pre-release-v1.2.5from Mar 6, 2026
Merged
Conversation
eigmax
reviewed
Mar 2, 2026
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Fixed wrong multiplier in
nb_scalar_bits()for Weierstrass curves.Was:
NB_LIMBS * 16= 512 bitsNow:
NB_LIMBS * NB_BITS_PER_LIMB= 256 bitsThis bug was inherited from SP1 (same issue exists in upstream). The code worked correctly but performed 2x unnecessary iterations in scalar multiplication (256 extra double operations with zero bits).