ssb-keys/sodium.js

'use strict'
var sodium = require('chloride')

module.exports = {

  curves: ['ed25519'],

  generate: function (seed) {
    if(!seed) sodium.randombytes(seed = new Buffer(32))

    var keys = seed ? sodium.crypto_sign_seed_keypair(seed) : sodium.crypto_sign_keypair()
    return {
      curve: 'ed25519',
      public: keys.publicKey,

      //so that this works with either sodium
      //or libsodium-wrappers (in browser)
      private: keys.privateKey || keys.secretKey
    }
  },

  sign: function (privateKey, message) {
    return sodium.crypto_sign_detached(message, privateKey)
  },

  verify: function (publicKey, sig, message) {
    return sodium.crypto_sign_verify_detached(sig, message, publicKey)
  }

}