public FileInfo(Reader reader)
{
byte ss = reader.ReadByte();
char buf = ',';
string DecryptedString = "";
for (int i = 0; i < ss; i++)
{
byte b = reader.ReadByte();
int bufInt = b;
bufInt ^= 0xFF;
buf = (char)bufInt;
DecryptedString = DecryptedString + buf;
}
FileName = DecryptedString;
//Console.WriteLine(FileName);
fileSize = reader.ReadUInt32();
byte[] tmp = reader.ReadBytes(fileSize);
int[] outbuf = new int[fileSize];
for (int i = 0; i < (int)fileSize; i++)
{
outbuf[i] = tmp[i];
}
decryptKeyZ = ((int)fileSize & 0x1fc) >> 2;
decryptKeyIndex2 = (decryptKeyZ % 9) + 1;
decryptKeyIndex1 = (decryptKeyZ % decryptKeyIndex2) + 1;
decryptKeyIndexZ = 0;
for (int i = 0; i < (int)fileSize; i++)
{
outbuf[i] ^= decryptKey2[decryptKeyIndex2++] ^ decryptKeyZ;
if (decryptKeyIndexZ == 1) // swap nibbles
{
outbuf[i] = (outbuf[i] >> 4) | ((outbuf[i] & 0xf) << 4);
}
outbuf[i] ^= decryptKey1[decryptKeyIndex1++];
if ((decryptKeyIndex1 <= 19) || (decryptKeyIndex2 <= 11))
{
if (decryptKeyIndex1 > 19)
{
decryptKeyIndex1 = 1;
decryptKeyIndexZ ^= 1;
}
if (decryptKeyIndex2 > 11)
{
decryptKeyIndex2 = 1;
decryptKeyIndexZ ^= 1;
}
}
else
{
decryptKeyZ++;
decryptKeyZ &= 0x7F;
if (decryptKeyIndexZ != 0)
{
decryptKeyIndex1 = (decryptKeyZ % 12) + 6;
decryptKeyIndex2 = (decryptKeyZ % 5) + 4;
decryptKeyIndexZ = 0;
}
else
{
decryptKeyIndexZ = 1;
decryptKeyIndex1 = (decryptKeyZ % 15) + 3;
decryptKeyIndex2 = (decryptKeyZ % 7) + 1;
}
}
}
Filedata = new byte[outbuf.Length];
for (int i = 0; i < outbuf.Length; i++)
{
Filedata[i] = (byte)outbuf[i];
}
}