crypto: don't ignore DH init errors

src/node_crypto.cc

@@ -3504,8 +3504,7 @@ class DiffieHellman : public ObjectWrap {
 
     if (args.Length() > 0) {
       if (args[0]->IsInt32()) {
-        diffieHellman->Init(args[0]->Int32Value());
-        initialized = true;
+        initialized = diffieHellman->Init(args[0]->Int32Value());
       } else {
         if (args[0]->IsString()) {
           char* buf;
@@ -3521,16 +3520,15 @@ class DiffieHellman : public ObjectWrap {
             return ThrowException(Exception::Error(
                   String::New("Invalid argument")));
           } else {
-            diffieHellman->Init(reinterpret_cast<unsigned char*>(buf), len);
+            initialized = diffieHellman->Init(
+                reinterpret_cast<unsigned char*>(buf), len);
             delete[] buf;
-            initialized = true;
           }
         } else if (Buffer::HasInstance(args[0])) {
           Local<Object> buffer = args[0]->ToObject();
-          diffieHellman->Init(
+          initialized = diffieHellman->Init(
                   reinterpret_cast<unsigned char*>(Buffer::Data(buffer)),
                   Buffer::Length(buffer));
-          initialized = true;
         }
       }
     }

test/simple/test-crypto.js

@@ -380,6 +380,14 @@ var secret3 = dh3.computeSecret(key2, 'hex', 'base64');
 
 assert.equal(secret1, secret3);
 
+// https://github.com/joyent/node/issues/2338
+assert.throws(function() {
+  var p = 'FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E088A67CC74' +
+          '020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B302B0A6DF25F1437' +
+          '4FE1356D6D51C245E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED' +
+          'EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE65381FFFFFFFFFFFFFFFF';
+  crypto.createDiffieHellman(p, 'hex');
+});
 
 // Test RSA key signing/verification
 var rsaSign = crypto.createSign('RSA-SHA1');