public static void Des(byte[] from, byte[] to, int length, D3DesKey key)
{
UInt32[] work = new UInt32[2];
for (int i = 0; i < length; i += 8)
{
Scrunch(from, (UInt32)i, work);
DesFunc(work, key);
UnScrun(work, to, (UInt32)i);
}
}
public static void EncryptBytes(byte[] bytes, string passwd)
{
byte[] rawKey = new byte[MaxPasswdLen];
for (int i = 0; i < MaxPasswdLen; i++)
{
if (i < passwd.Length)
{
rawKey[i] = (byte)passwd[i];
}
else
{
rawKey[i] = 0;
}
}
D3DesKey key = new D3DesKey(rawKey, EncryptMode.EN0);
D3Des.Des(bytes, bytes, RfbSize.AuthChallenge, key);
}
private static void DesFunc(UInt32[] block, D3DesKey key)
{
UInt32 work;
UInt32 leftt = block[0];
UInt32 right = block[1];
work = ((leftt >> 4) ^ right) & 0x0F0F0F0F;
right ^= work;
leftt ^= (work << 4);
work = ((leftt >> 16) ^ right) & 0x0000FFFF;
right ^= work;
leftt ^= (work << 16);
work = ((right >> 2) ^ leftt) & 0x33333333;
leftt ^= work;
right ^= (work << 2);
work = ((right >> 8) ^ leftt) & 0x00FF00FF;
leftt ^= work;
right ^= (work << 8);
right = ((right << 1) | ((right >> 31) & 1)) & 0xFFFFFFFF;
work = (leftt ^ right) & 0xAAAAAAAA;
leftt ^= work;
right ^= work;
leftt = ((leftt << 1) | ((leftt >> 31) & 1)) & 0xFFFFFFFF;
int keyIndex = 0;
for (int round = 0; round < 8; round++)
{
UInt32 fval;
work = (right << 28) | (right >> 4);
work ^= key[keyIndex++];
fval = sp7[work & 0x3F];
fval |= sp5[(work >> 8) & 0x3F];
fval |= sp3[(work >> 16) & 0x3F];
fval |= sp1[(work >> 24) & 0x3F];
work = right ^ key[keyIndex++];
fval |= sp8[work & 0x3F];
fval |= sp6[(work >> 8) & 0x3F];
fval |= sp4[(work >> 16) & 0x3F];
fval |= sp2[(work >> 24) & 0x3F];
leftt ^= fval;
work = (leftt << 28) | (leftt >> 4);
work ^= key[keyIndex++];
fval = sp7[work & 0x3F];
fval |= sp5[(work >> 8) & 0x3F];
fval |= sp3[(work >> 16) & 0x3F];
fval |= sp1[(work >> 24) & 0x3F];
work = leftt ^ key[keyIndex++];
fval |= sp8[work & 0x3F];
fval |= sp6[(work >> 8) & 0x3F];
fval |= sp4[(work >> 16) & 0x3F];
fval |= sp2[(work >> 24) & 0x3F];
right ^= fval;
}
right = (right << 31) | (right >> 1);
work = (leftt ^ right) & 0xAAAAAAAA;
leftt ^= work;
right ^= work;
leftt = (leftt << 31) | (leftt >> 1);
work = ((leftt >> 8) ^ right) & 0x00FF00FF;
right ^= work;
leftt ^= (work << 8);
work = ((leftt >> 2) ^ right) & 0x33333333;
right ^= work;
leftt ^= (work << 2);
work = ((right >> 16) ^ leftt) & 0x0000FFFF;
leftt ^= work;
right ^= (work << 16);
work = ((right >> 4) ^ leftt) & 0x0F0F0F0F;
leftt ^= work;
right ^= (work << 4);
block[0] = right;
block[1] = leftt;
}
