33 lines
731 B
Go
33 lines
731 B
Go
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/*
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* Copyright (c) 2026 Kaiy Ragur
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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package utils
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import (
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"crypto/ed25519"
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"crypto/sha512"
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"filippo.io/edwards25519"
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)
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func PubEd25519ToX25519(pub ed25519.PublicKey) ([]byte, error) {
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point, err := edwards25519.NewIdentityPoint().SetBytes(pub)
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if err != nil {
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return nil, err
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}
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x25519Pub := point.BytesMontgomery()
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return x25519Pub, nil
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}
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func PrivEd25519ToX25519(priv ed25519.PrivateKey) ([]byte, error) {
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seed := priv.Seed()
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h := sha512.Sum512(seed)
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x25519Priv := h[:32]
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return x25519Priv, nil
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}
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