nazar-pc / ed25519-to-x25519.wasm

Library for converting Ed25519 signing key pair into X25519/Curve25519 key pair suitable for Diffie-Hellman key exchange

ed25519-to-x25519.wasm

Library for converting Ed25519 signing key pair into X25519/Curve25519 key pair suitable for Diffie-Hellman key exchange.

Based on libsodium, compiles subset of libsodium to WebAssembly and provides 2 wrapper functions for public/private keys conversion.

How to install

npm install ed25519-to-x25519.wasm

How to use

Node.js:

var ed25519_to_x25519 = require('ed25519-to-x25519.wasm')

ed25519_to_x25519.ready(function () {
    // Do stuff
});

Browser:

requirejs(['ed25519-to-x25519.wasm'], function (ed25519_to_x25519) {
    ed25519_to_x25519.ready(function () {
        // Do stuff
    });
})

API

ed25519_to_x25519.ready(callback)

• callback - Callback function that is called when WebAssembly is loaded and library is ready for use

ed25519_to_x25519.convert_public_key(ed25519_public_key : Uint8Array) : Uint8Array

Converts Ed25519 public key into X25519/Curve25519 public key. Returns null if conversion fails.

ed25519_to_x25519.convert_private_key(ed25519_private_key : Uint8Array) : Uint8Array

Converts Ed25519 private key into X25519/Curve25519 private key.

Take a look at src/index.ls for JsDoc sections with arguments and return types as well as methods description, look at tests/index.ls for usage examples.

Contribution

Feel free to create issues and send pull requests (for big changes create an issue first and link it from the PR), they are highly appreciated!

When reading LiveScript code make sure to configure 1 tab to be 4 spaces (GitHub uses 8 by default), otherwise code might be hard to read.

License

Free Public License 1.0.0 / Zero Clause BSD License

https://opensource.org/licenses/FPL-1.0.0

https://tldrlegal.com/license/bsd-0-clause-license

ed25519-to-x25519.wasm's Issues

In-depth question

The script works well, I try to recode it in rust, I have no trouble finding the same result as you on the public key but the private key gives me more trouble, as there are two distinct functions I was thinking that there must be a manipulation to do or a notion that I do not understand to convert the private key Thank you in advance for the answer.