createDiffieHellman derps

hrmm.js

var assert = require('assert')
var crypto = require('crypto')
var fs = require('fs')

var alice = crypto.createDiffieHellman(2048)
alice.setPrivateKey(fs.readFileSync('../alice.private.pem').toString('hex'),'hex')
alice.setPublicKey(fs.readFileSync('../alice.public.pem').toString('hex'),'hex')

var bob = crypto.createDiffieHellman(2048)
bob.setPrivateKey(fs.readFileSync('../bob.private.pem').toString('hex'),'hex')
bob.setPublicKey(fs.readFileSync('../bob.public.pem').toString('hex'),'hex')

console.log(alice.computeSecret(bob.getPublicKey('base64'), 'base64', 'base64'))

keygen.sh

#!/bin/env bash

# generate parameters for each person
openssl genpkey -genparam -algorithm DH -pkeyopt dh_rfc5114:2 -out params.diffie.alice.pem
openssl genpkey -genparam -algorithm DH -pkeyopt dh_rfc5114:2 -out params.diffie.bob.pem

# generate the private keys for each person
openssl genpkey -paramfile params.diffie.alice.pem -out alice.private.pem
openssl genpkey -paramfile params.diffie.alice.pem -out bob.private.pem

# generate the public keys for each person
openssl pkey -in alice.private.pem -pubout -out alice.public.pem
openssl pkey -in bob.private.pem -pubout -out bob.public.pem