public override void doUpdate(byte[] i, int inOffset, int len)
{
byte[] data;
if (nonProcessed != null)
{
int totalLen = len + nonProcessed.Length;
data = new byte[totalLen];
ConversionUtils.arraycopy(nonProcessed, 0, data, 0, nonProcessed.Length);
ConversionUtils.arraycopy(i, inOffset, data, nonProcessed.Length, len);
}
else
{
data = new byte[len];
ConversionUtils.arraycopy(i, inOffset, data, 0, len);
}
int count = 0;
while (count < data.Length - 0x10)
{
byte[] aux = new byte[0x10];
ConversionUtils.arraycopy(data, count, aux, 0, aux.Length);
ToolsImpl.XOR(aux, aux, previous);
ToolsImpl.aesecbEncrypt(key, aux, 0, previous, 0, aux.Length);
count += 0x10;
}
nonProcessed = new byte[data.Length - count];
ConversionUtils.arraycopy(data, count, nonProcessed, 0, nonProcessed.Length);
}
private bool checkNPDHash2(byte[] klicensee, byte[] npd)
{
byte[] xoredKey = new byte[0x10];
ToolsImpl.XOR(xoredKey, klicensee, EDATKeys.npdrm_omac_key2);
byte[] calculated = ToolsImpl.CMAC128(xoredKey, npd, 0, 0x60);
bool result2 = compareBytes(calculated, 0, npd, 0x60, 0x10);
if (result2)
{
Debug.WriteLine("NPD hash 2 is valid (" + ConversionUtils.getHexString(calculated) + ")");
}
return(result2);
}
public override bool doFinal(byte[] expectedhash, int hashOffset, bool hashDebug)
{
byte[] aux = new byte[0x10];
ConversionUtils.arraycopy(nonProcessed, 0, aux, 0, nonProcessed.Length);
if (nonProcessed.Length == 0x10)
{
ToolsImpl.XOR(aux, aux, K1);
}
else
{
aux[nonProcessed.Length] = (byte)0x80;
ToolsImpl.XOR(aux, aux, K2);
}
ToolsImpl.XOR(aux, aux, previous);
byte[] calculatedhash = new byte[0x10];
ToolsImpl.aesecbEncrypt(key, aux, 0, calculatedhash, 0, aux.Length);
return(hashDebug || compareBytes(expectedhash, hashOffset, calculatedhash, 0, hashLen));
}
private byte[] getKey(NPD npd, EDATData data, byte[] devKLic, byte[] keyFromRif)
{
byte[] result = null;
if ((data.getFlags() & FLAG_SDAT) != 0)
{
//Case SDAT
result = new byte[0x10];
ToolsImpl.XOR(result, npd.getDevHash(), EDATKeys.SDATKEY);
}
else
{
//Case EDAT
if (npd.getLicense() == 0x03)
{
result = devKLic;
}
else if (npd.getLicense() == 0x02)
{
result = keyFromRif;
}
}
return(result);
}