Hello everyone. I'm trying to implement sphinx password store protocol which needs an inverse element webee.technion.ac.il/~hugo/sphinx.pdf using 25519
It's all ok with p-256 curve (PoC in Golang is here: https://gist.github.com/Scratch-net/37ae11e589ea3d17fe104a2630306042), works like a charm, but nothing helps for Curve25519. I tried to 1) Remove clamping before second scalarMult 2) Inverse Endianness, convert scalar to BigInt, use the standard ModInverse, convert back to bytes and reverse byte order once again but that did not help I'm obviously missing something but cannot figure out what. I'd love to get an advice on how to achieve that using ref10 notation or similar existing code Thanks in advance, Alex. _______________________________________________ Curves mailing list Curves@moderncrypto.org https://moderncrypto.org/mailman/listinfo/curves