1 files changed, 26 insertions, 0 deletions
diff --git a/library/cryptojs/components/pad-iso97971.js b/library/cryptojs/components/pad-iso97971.js
new file mode 100644
index 000000000..a60e23192
--- /dev/null
+++ b/library/cryptojs/components/pad-iso97971.js
@@ -0,0 +1,26 @@
+/*
+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--;
+    }
+};