Generate a secp521r1 EC keypair

generate_ec_keypair.js

var child_process = require('child_process')

function generateKeyPair(callback) {
  
  var keypair = {
    privKey: '',
    pubKey: ''
  }
  
  var priv_openssl = child_process.spawn('openssl', ['ecparam', '-name', 'secp521r1', '-genkey', '-noout'])
  var pub_openssl = require('child_process').spawn('openssl' ,['ec','-pubout', '-conv_form', 'compressed'])

  pub_openssl.stdout.setEncoding('utf8')
  pub_openssl.stdout.on('data', function(data) {
    keypair.pubKey += data
  })

  pub_openssl.stdout.on('end', function() {
    var ecFound = /-----BEGIN PUBLIC KEY-----/.exec(keypair.pubKey);
    if (!ecFound) {
      callback(new Error("Output doesn't look like a EC public key"))
    }

    return callback(null, keypair)
  })

  pub_openssl.on('error', function(err){
    return callback(err)
  })

  priv_openssl.stdout.on('data', function(data) {
    keypair.privKey += data
  })
  
  priv_openssl.stdout.on('end', function() {
    var ecFound = /-----BEGIN EC PRIVATE KEY-----/.exec(keypair.privKey);
    if (!ecFound) {
      return callback(new Error("Output doesn't look like a EC private key"))
    }
  })
  
  priv_openssl.on('error', function(err) {
    return callback(err)
  })
  
  pub_openssl.stdin.setEncoding('utf-8')
  priv_openssl.stdout.pipe(pub_openssl.stdin)
}

module.exports.generateKeyPair = generateKeyPair