From 6e1f95163795d07a3c6eaed7384f7017a2a75774 Mon Sep 17 00:00:00 2001
From: Alex Beregszaszi <alex@rtfs.hu>
Date: Tue, 8 Mar 2016 21:44:42 +0000
Subject: [PATCH] Support Quorum Wallet seed

---
 README.md     |  1 +
 index.js      | 10 ++++++++++
 test/index.js |  7 +++++++
 3 files changed, 18 insertions(+)

diff --git a/README.md b/README.md
index 3c5434b..d3f1b7c 100644
--- a/README.md
+++ b/README.md
@@ -29,6 +29,7 @@ Constructors:
 * `fromEtherCamp(passphrase)` - import a brain wallet used by Ether.Camp
 * `fromEtherWallet(input, password)` - import a wallet generated by EtherWallet
 * `fromKryptoKit(seed)` - import a wallet from a KryptoKit seed
+* `fromQuorumWallet(passphrase, userid)` - import a brain wallet used by Quorum Wallet
 
 For the V1, V3 and EthSale formats the input is a JSON serialized string. All these formats require a password.
 
diff --git a/index.js b/index.js
index 7697e48..be55ea6 100644
--- a/index.js
+++ b/index.js
@@ -418,4 +418,14 @@ Wallet.fromKryptoKit = function (entropy, password) {
   return new Wallet(privKey)
 }
 
+Wallet.fromQuorumWallet = function (passphrase, userid) {
+  assert(passphrase.length >= 10)
+  assert(userid.length >= 10)
+
+  var seed = passphrase + userid
+  seed = crypto.pbkdf2Sync(seed, seed, 2000, 32, 'sha256');
+
+  return new Wallet(seed)
+}
+
 module.exports = Wallet
diff --git a/test/index.js b/test/index.js
index 400334c..60ef537 100644
--- a/test/index.js
+++ b/test/index.js
@@ -148,3 +148,10 @@ describe('.fromKryptoKit()', function () {
     assert.equal(wallet.getAddressString(), '0x3c753e27834db67329d1ec1fab67970ec1e27112')
   })
 })
+
+describe('.fromQuorumWallet()', function () {
+  it('should work', function () {
+    var wallet = Wallet.fromQuorumWallet('testtesttest', 'ethereumjs-wallet')
+    assert.equal(wallet.getAddressString(), '0x1b86ccc22e8f137f204a41a23033541242a48815')
+  })
+})