Add some more tests for the crypto module

test/tests.js

@@ -11,6 +11,32 @@ test("key generation", function() {
     var newKey = safe.crypto.genKey(pwd, key.salt, keyLength);
 
     // Using the same password and salt should result in the same key
-    equal(key.key.join(), newKey.key.join());
-    equal(key.salt.join(), newKey.salt.join());
+    deepEqual(key.key, newKey.key);
+    deepEqual(key.salt, newKey.salt);
+
+    newKey = safe.crypto.genKey(pwd, null, keyLength);
+
+    // A key generated with new salt should turn out differently.
+    notDeepEqual(newKey.key, key.key);
+});
+
+test("encrypt/decrypt roundtrip", function() {
+    var pwd = "password", pt = "Hello World!";
+    var key = safe.crypto.genKey(pwd);
+
+    var c = safe.crypto.encrypt(key.key, pt);
+
+    // We should get back a _safe.crypto.container_ object
+    ok(safe.crypto.container.isPrototypeOf(c));
+
+    // Encrypting the same value twice with the same key should
+    // result in two different cipher texts, since a new iv is randomly
+    // generated each time
+    var newC = safe.crypto.encrypt(key.key, pt);
+    notEqual(newC.ct, c.ct);
+
+    // Decrypted value should be equal to the original value
+    var dec = safe.crypto.decrypt(key.key, c);
+
+    equal(dec, pt);
 });