static IVGenerator(){
rc4 = new ARCFOUREncryption();
byte[] longBytes = new byte[8];
long val = DateTime.Now.Ticks;
for (int i = 0; i != 8; i++) {
longBytes[i] = (byte)val;
val = (long)((ulong)val >> 8);
}
rc4.PrepareARCFOURKey(longBytes);
}
static IVGenerator(){
rc4 = new ARCFOUREncryption();
byte[] longBytes = new byte[8];
long val = DateTime.Now.Ticks;
for (int i = 0; i != 8; i++) {
longBytes[i] = (byte)val;
val = (long)((ulong)val >> 8);
}
rc4.PrepareARCFOURKey(longBytes);
}
/** Creates a new instance of StandardDecryption */
public StandardDecryption(byte[] key, int off, int len, int revision) {
aes = (revision == AES_128 || revision == AES_256);
if (aes) {
this.key = new byte[len];
System.Array.Copy(key, off, this.key, 0, len);
}
else {
arcfour = new ARCFOUREncryption();
arcfour.PrepareARCFOURKey(key, off, len);
}
}
/** Creates a new instance of StandardDecryption */
public StandardDecryption(byte[] key, int off, int len, int revision)
{
aes = revision == AES_128;
if (aes)
{
this.key = new byte[len];
System.Array.Copy(key, off, this.key, 0, len);
}
else
{
arcfour = new ARCFOUREncryption();
arcfour.PrepareARCFOURKey(key, off, len);
}
}
public OutputStreamEncryption(Stream outc, byte[] key, int off, int len, int revision) {
this.outc = outc;
aes = revision == AES_128;
if (aes) {
byte[] iv = IVGenerator.GetIV();
byte[] nkey = new byte[len];
System.Array.Copy(key, off, nkey, 0, len);
cipher = new AESCipher(true, nkey, iv);
Write(iv, 0, iv.Length);
}
else {
arcfour = new ARCFOUREncryption();
arcfour.PrepareARCFOURKey(key, off, len);
}
}
