org.bouncycastle.crypto.engines.VMPCKSA3Engine Maven / Gradle / Ivy
package org.bouncycastle.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;
}
}