| private static bytesToint ( byte inBytes, int inOff ) : int | ||
| inBytes | byte | |
| inOff | int | |
| 리턴 | int | |
private int[] generateWorkingKey(bool forEncryption, byte[] userKey)
{
this.forEncryption = forEncryption;
if (userKey.Length != 32)
{
throw new ArgumentException("Key length invalid. Key needs to be 32 byte - 256 bit!!!");
}
int[] array = new int[8];
for (int num = 0; num != 8; num++)
{
array[num] = Gost28147Engine.bytesToint(userKey, num * 4);
}
return(array);
}
private void Gost28147Func(int[] workingKey, byte[] inBytes, int inOff, byte[] outBytes, int outOff)
{
int num = Gost28147Engine.bytesToint(inBytes, inOff);
int num2 = Gost28147Engine.bytesToint(inBytes, inOff + 4);
if (this.forEncryption)
{
for (int i = 0; i < 3; i++)
{
for (int j = 0; j < 8; j++)
{
int num3 = num;
int num4 = this.Gost28147_mainStep(num, workingKey[j]);
num = (num2 ^ num4);
num2 = num3;
}
}
for (int k = 7; k > 0; k--)
{
int num3 = num;
num = (num2 ^ this.Gost28147_mainStep(num, workingKey[k]));
num2 = num3;
}
}
else
{
for (int l = 0; l < 8; l++)
{
int num3 = num;
num = (num2 ^ this.Gost28147_mainStep(num, workingKey[l]));
num2 = num3;
}
for (int m = 0; m < 3; m++)
{
int num5 = 7;
while (num5 >= 0 && (m != 2 || num5 != 0))
{
int num3 = num;
num = (num2 ^ this.Gost28147_mainStep(num, workingKey[num5]));
num2 = num3;
num5--;
}
}
}
num2 ^= this.Gost28147_mainStep(num, workingKey[0]);
Gost28147Engine.intTobytes(num, outBytes, outOff);
Gost28147Engine.intTobytes(num2, outBytes, outOff + 4);
}