1 files changed, 45 insertions, 0 deletions
diff --git a/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/engines/VMPCKSA3Engine.java b/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/engines/VMPCKSA3Engine.java
new file mode 100644
index 000000000..2e03fdbbb
--- /dev/null
+++ b/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/engines/VMPCKSA3Engine.java
@@ -0,0 +1,45 @@
+package org.spongycastle.crypto.engines;
+
+public class VMPCKSA3Engine extends VMPCEngine
+{
+    public String getAlgorithmName()
+    {
+        return "VMPC-KSA3";
+    }
+
+    protected void initKey(byte[] keyBytes, byte[] ivBytes)
+    {
+        s = 0;
+        P = new byte[256];
+        for (int i = 0; i < 256; i++)
+        {
+            P[i] = (byte) i;
+        }
+
+        for (int m = 0; m < 768; m++)
+        {
+            s = P[(s + P[m & 0xff] + keyBytes[m % keyBytes.length]) & 0xff];
+            byte temp = P[m & 0xff];
+            P[m & 0xff] = P[s & 0xff];
+            P[s & 0xff] = temp;
+        }
+
+        for (int m = 0; m < 768; m++)
+        {
+            s = P[(s + P[m & 0xff] + ivBytes[m % ivBytes.length]) & 0xff];
+            byte temp = P[m & 0xff];
+            P[m & 0xff] = P[s & 0xff];
+            P[s & 0xff] = temp;
+        }
+
+        for (int m = 0; m < 768; m++)
+        {
+            s = P[(s + P[m & 0xff] + keyBytes[m % keyBytes.length]) & 0xff];
+            byte temp = P[m & 0xff];
+            P[m & 0xff] = P[s & 0xff];
+            P[s & 0xff] = temp;
+        }
+
+        n = 0;
+    }
+}