From 29ad6b692e5bac9a1282f3dcf05222c79f086fc2 Mon Sep 17 00:00:00 2001
From: Andreas Brekken <a@abrkn.com>
Date: Tue, 11 Mar 2014 18:25:36 +0100
Subject: [PATCH 1/3] Message signing does not work with compressed keys. ref
 #61

---
 test/message.js | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/test/message.js b/test/message.js
index 553cd13..fd00fa9 100644
--- a/test/message.js
+++ b/test/message.js
@@ -30,5 +30,21 @@ describe('Message', function() {
             var sig = Message.signMessage(key, msg);
             assert.ok(!Message.verifyMessage(addr, sig, msg));
         })
+
+        it('handles compressed keys', function() {
+            var key = new ECKey(hexToBytes(priv));
+            key.compressed = true
+
+            var addr = key.getBitcoinAddress().toString()
+
+            var sig = Message.signMessage(key, msg);
+            assert.ok(Message.verifyMessage(addr, sig, msg));
+
+            // wrong message
+            assert.ok(!Message.verifyMessage(addr, sig, 'not foobar'));
+
+            // wrong address
+            assert.ok(!Message.verifyMessage('1MsHWS1BnwMc3tLE8G35UXsS58fKipzB7a', sig, msg));
+        })
     })
 })

From f09890fed1331931d083ebcdc9f4052fd7498137 Mon Sep 17 00:00:00 2001
From: Andreas Brekken <a@abrkn.com>
Date: Tue, 11 Mar 2014 18:26:40 +0100
Subject: [PATCH 2/3] Determine whether key is compressed from the key itself.
 ref #61

---
 src/message.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/message.js b/src/message.js
index b370f92..beacfa6 100644
--- a/src/message.js
+++ b/src/message.js
@@ -27,7 +27,7 @@ Message.getHash = function (message) {
   return Crypto.SHA256(Crypto.SHA256(buffer, {asBytes: true}), {asBytes: true});
 };
 
-Message.signMessage = function (key, message, compressed) {
+Message.signMessage = function (key, message) {
   var hash = Message.getHash(message);
 
   var sig = key.sign(hash);
@@ -37,7 +37,7 @@ Message.signMessage = function (key, message, compressed) {
   var i = ecdsa.calcPubkeyRecoveryParam(key, obj.r, obj.s, hash);
 
   i += 27;
-  if (compressed) i += 4;
+  if (key.compressed) i += 4;
 
   var rBa = obj.r.toByteArrayUnsigned();
   var sBa = obj.s.toByteArrayUnsigned();

From 08e75a82c91368af8002865e66adee6c01eb9167 Mon Sep 17 00:00:00 2001
From: Andreas Brekken <a@abrkn.com>
Date: Tue, 11 Mar 2014 18:28:04 +0100
Subject: [PATCH 3/3] Add whether pubkey recovered from sig is compressed.
 close #61

---
 src/message.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/message.js b/src/message.js
index beacfa6..e2367c7 100644
--- a/src/message.js
+++ b/src/message.js
@@ -59,6 +59,7 @@ Message.verifyMessage = function (address, sig, message) {
 
   var isCompressed = !!(sig.i & 4);
   var pubKey = ecdsa.recoverPubKey(sig.r, sig.s, hash, sig.i);
+  pubKey.compressed = isCompressed;
 
   var expectedAddress = pubKey.getBitcoinAddress().toString();