fix private key validation and base58 invalid tests

PrivateKey.js

@@ -19,6 +19,7 @@ PrivateKey.prototype.validate = function() {
     if (this.data.length < 32 || (this.data.length > 1+32 && !this.compressed()) || (this.data.length==1+32+1 && this.data[1+32+1-1]!=1) || this.data.length>1+32+1)
       throw new Error('invalid data length');
   });
+  if (typeof this.network() === 'undefined') throw new Error('invalid network');
 };
 
 // get or set the payload data (as a Buffer object)

WalletKey.js

@@ -42,6 +42,7 @@ WalletKey.prototype.fromObj = function(obj) {
     this.privKey.compressed = typeof obj.compressed === 'undefined'? true: obj.compressed;
   } else {
     var priv = new PrivateKey(obj.priv);
+    priv.validate();
     this.privKey.private = new Buffer(priv.payload());
     this.privKey.compressed = priv.compressed();
   }

test/test.misc.js

@@ -131,11 +131,31 @@ describe('Miscelaneous stuff', function() {
   });
   testdata.dataBase58KeysInvalid.forEach(function(datum) {
     var b58 = datum[0];
-    it('shouldnt be able to create Address nor WalletKey with ' + b58, function() {
+    it('shouldnt be able to create Address with ' + b58, function() {
       var a = new Address(b58);
       var invalidAddress = (!a.isValid());
       invalidAddress.should.equal(true);
     });
+    it('shouldnt be able to create WalletKey with ' + b58, function() {
+      var kl = new WalletKey({
+        network: networks.livenet
+      });
+      var kt = new WalletKey({
+        network: networks.livenet
+      });
+      var createLivenet = function() {
+        kl.fromObj({
+          priv: b58
+        });
+      };
+      var createTestnet = function() {
+        kt.fromObj({
+          priv: b58
+        });
+      };
+      createLivenet.should.throw();
+      createTestnet.should.throw();
+    });
   });
 
 });