public KIRK(sbyte[] seed, int seedLength, int fuseid0, int fuseid1)
{
// Set up the data for the pseudo random number generator using a
// seed set by the user.
sbyte[] temp = new sbyte[0x104];
temp[0] = 0;
temp[1] = 0;
temp[2] = 1;
temp[3] = 0;
ByteBuffer bTemp = ByteBuffer.wrap(temp);
ByteBuffer bPRNG = ByteBuffer.wrap(prng_data);
// Random data to act as a key.
sbyte[] key = new sbyte[] { (sbyte)0x07, unchecked ((sbyte)0xAB), unchecked ((sbyte)0xEF), unchecked ((sbyte)0xF8), unchecked ((sbyte)0x96), unchecked ((sbyte)0x8C), unchecked ((sbyte)0xF3), unchecked ((sbyte)0xD6), (sbyte)0x14, unchecked ((sbyte)0xE0), unchecked ((sbyte)0xEB), unchecked ((sbyte)0xB2), unchecked ((sbyte)0x9D), unchecked ((sbyte)0x8B), (sbyte)0x4E, (sbyte)0x74 };
// Direct call to get the system time.
int systime = (int)DateTimeHelper.CurrentUnixTimeMillis();
// Generate a SHA-1 hash for the PRNG.
if (seedLength > 0)
{
sbyte[] seedBuf = new sbyte[seedLength + 4];
ByteBuffer bSeedBuf = ByteBuffer.wrap(seedBuf);
SHA1_Header seedHeader = new SHA1_Header(this, bSeedBuf);
bSeedBuf.rewind();
seedHeader.dataSize = seedLength;
executeKIRKCmd11(bPRNG, bSeedBuf, seedLength + 4);
}
// Use the system time for randomness.
Array.Copy(prng_data, 0, temp, 4, 0x14);
temp[0x18] = unchecked ((sbyte)(systime & 0xFF));
temp[0x19] = unchecked ((sbyte)((systime >> 8) & 0xFF));
temp[0x1A] = unchecked ((sbyte)((systime >> 16) & 0xFF));
temp[0x1B] = unchecked ((sbyte)((systime >> 24) & 0xFF));
// Set the sealed override PRNG number.
Array.Copy(key, 0, temp, 0x1C, 0x10);
bPRNG.clear();
executeKIRKCmd11(bPRNG, bTemp, 0x104);
fuseID0 = fuseid0;
fuseID1 = fuseid1;
}
// Generate SHA1 hash.
private int executeKIRKCmd11(ByteBuffer @out, ByteBuffer @in, int size)
{
// Return an error if the crypto engine hasn't been initialized.
if (!CryptoEngine.CryptoEngineStatus)
{
return(PSP_KIRK_NOT_INIT);
}
int outPosition = @out.position();
SHA1_Header header = new SHA1_Header(this, @in);
SHA1 sha1 = new SHA1();
size = (size < header.dataSize) ? size : header.dataSize;
header.readData(@in, size);
@out.position(outPosition);
@out.put(sha1.doSHA1(header.data, size));
@in.clear();
return(0);
}
