[DO NOT MERGE] crypto: ed25519 -> Wei conversion#10345
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j-berman wants to merge 6 commits intomonero-project:masterfrom
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[DO NOT MERGE] crypto: ed25519 -> Wei conversion#10345j-berman wants to merge 6 commits intomonero-project:masterfrom
j-berman wants to merge 6 commits intomonero-project:masterfrom
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https://iacr.org/archive/pkc2004/29470042/29470042.pdf 2.2 Co-authored-by: Jeffro <jeffro256@tutanota.com>
j-berman
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This was referenced Mar 2, 2026
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Builds on top of:
fe_batch_invertusing Montgomery's trick #10111When inserting outputs into the FCMP++ tree, we convert each output pubkey, key image generator, and commitment (ed25519 points) into Wei x and y coordinates (as part of the tower cycle critical for the curve tree -- Wei coordinates are "Selene" scalars).
This PR introduces the crypto functions necessary to perform the conversion:
point_to_ed_derivativesed_derivatives_to_wei_x_yfe_ed_derivatives_to_wei_x_yIt uses the equation from E.2 in https://www.ietf.org/archive/id/draft-ietf-lwig-curve-representations-02.pdf.