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src/js/lib/cryptojs/pad-iso97971.js

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+/*
+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
+*/
+/**
+ * ISO/IEC 9797-1 Padding Method 2.
+ */
+CryptoJS.pad.Iso97971 = {
+    pad: function (data, blockSize) {
+        // Add 0x80 byte
+        data.concat(CryptoJS.lib.WordArray.create([0x80000000], 1));
+
+        // Zero pad the rest
+        CryptoJS.pad.ZeroPadding.pad(data, blockSize);
+    },
+
+    unpad: function (data) {
+        // Remove zero padding
+        CryptoJS.pad.ZeroPadding.unpad(data);
+
+        // Remove one more byte -- the 0x80 byte
+        data.sigBytes--;
+    }
+};