1 files changed, 31 insertions, 0 deletions
diff --git a/library/cryptojs/components/pad-zeropadding.js b/library/cryptojs/components/pad-zeropadding.js
new file mode 100644
index 000000000..e4b5acb99
--- /dev/null
+++ b/library/cryptojs/components/pad-zeropadding.js
@@ -0,0 +1,31 @@
+/*
+CryptoJS v3.1.2
+code.google.com/p/crypto-js
+(c) 2009-2013 by Jeff Mott. All rights reserved.
+code.google.com/p/crypto-js/wiki/License
+*/
+/**
+ * Zero padding strategy.
+ */
+CryptoJS.pad.ZeroPadding = {
+    pad: function (data, blockSize) {
+        // Shortcut
+        var blockSizeBytes = blockSize * 4;
+
+        // Pad
+        data.clamp();
+        data.sigBytes += blockSizeBytes - ((data.sigBytes % blockSizeBytes) || blockSizeBytes);
+    },
+
+    unpad: function (data) {
+        // Shortcut
+        var dataWords = data.words;
+
+        // Unpad
+        var i = data.sigBytes - 1;
+        while (!((dataWords[i >>> 2] >>> (24 - (i % 4) * 8)) & 0xff)) {
+            i--;
+        }
+        data.sigBytes = i + 1;
+    }
+};