runtime-node-crypto/index.js

A Node compatible Crypto module for runtimejs

'use strict';

var Hash = require('./lib/hash');
var ciphers = require('./lib/cipher');

/* Since sodium uses crypto.randomBytes:
A) This module will ONLY work when aliased to 'crypto' in runtimeify, AND
B) It MUST expose randomBytes BEFORE requiring sodium-browserify
*/
module.exports = {
  randomBytes: function(length) {
    if (!length) {
      throw new Error('runtime-node-crytpo: length must be provided.');
    }
    
    if (length === 0) {
      throw new Error('runtime-node-crytpo: length must be greater than 0.');
    }
    
    var u8 = runtime.random.getRandomValues(length);
    return new Buffer(u8);
  },
  getRandomValues: runtime.random.getRandomValues // <-- for diffie-hellman and browserify-sign to not complain
};

global.crypto = module.exports; // <-- again, for diffie-hellman and browserify-sign to not complain

// Now we can use all the goodies!
const sodium = require('sodium-browserify');

// Just copy them to module.exports...
for (let k in sodium) {
  module.exports[k] = sodium[k];
}

module.exports.createHash = function(alg, opt) {
  return new Hash(alg, opt);
}

module.exports.Hash = Hash;

var dh = require('diffie-hellman');

// Copy diffie-hellman
for (let k in dh) {
  module.exports[k] = dh[k];
}

var bs = require('browserify-sign');

// Copy browserify-sign
for (let k in bs) {
  module.exports[k] = bs[k];
}

module.exports.createCipher = function(cipher, key) {
  return new ciphers.Cipher(cipher, key);
}

module.exports.createCipheriv = function(cipher, key, iv) {
  return new ciphers.Cipheriv(cipher, key, iv);
}

module.exports.createDecipher = function(cipher, key) {
  return new ciphers.Decipher(cipher, key);
}

module.exports.createDecipheriv = function(cipher, key, iv) {
  return new ciphers.Decipheriv(cipher, key, iv);
}

// Copy the cipher classes
for (let k in ciphers) {
  module.exports[k] = ciphers[k];
}

var ch = require('create-hmac');

// Copy create-hmac
for (let k in ch) {
  module.exports[k] = ch[k];
}

global.crypto = module.exports;