From abcd174bd355b840cefa61e627bdc44424593e2a Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Tue, 23 Feb 2016 13:25:21 -0800
Subject: [PATCH] add random function.

---
 lib/bcoin/ec.js | 7 +++++++
 lib/bcoin/hd.js | 4 ++--
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/lib/bcoin/ec.js b/lib/bcoin/ec.js
index dae1bba3..c09b786b 100644
--- a/lib/bcoin/ec.js
+++ b/lib/bcoin/ec.js
@@ -5,6 +5,7 @@
  */
 
 var bcoin = require('../bcoin');
+var elliptic = require('elliptic');
 var bn = require('bn.js');
 var utils = bcoin.utils;
 var assert = utils.assert;
@@ -31,6 +32,12 @@ ec.generate = function generate(options) {
   return { privateKey: priv, publicKey: pub };
 };
 
+ec.random = function random(size) {
+  if (bcoin.crypto)
+    return bcoin.crypto.randomBytes(size);
+  return new Buffer(elliptic.rand(size));
+};
+
 ec.verify = function verify(msg, sig, key, historical) {
   if (key.getPublicKey)
     key = key.getPublicKey();
diff --git a/lib/bcoin/hd.js b/lib/bcoin/hd.js
index 1aa47713..4cb6f7ff 100644
--- a/lib/bcoin/hd.js
+++ b/lib/bcoin/hd.js
@@ -75,7 +75,7 @@ function HDSeed(options) {
   options = options || {};
 
   this.bits = options.bits || 128;
-  this.entropy = options.entropy || new Buffer(elliptic.rand(this.bits / 8));
+  this.entropy = options.entropy || bcoin.ec.random(this.bits / 8);
   this.mnemonic = options.mnemonic || HDSeed._mnemonic(this.entropy);
   this.seed = this.createSeed(options.passphrase);
 }
@@ -622,7 +622,7 @@ HDPrivateKey.prototype._generate = function _generate(privateKey, entropy) {
     privateKey = bcoin.keypair._fromSecret(privateKey).privateKey;
 
   if (!entropy)
-    entropy = new Buffer(elliptic.rand(32));
+    entropy = bcoin.ec.random(32);
 
   return {
     version: network[this.network].prefixes.xprivkey,