| private static XorPad ( byte pad, int len, byte n ) : void | ||
| pad | byte | |
| len | int | |
| n | byte | |
| return | void | |
public virtual void Init(ICipherParameters parameters)
{
this.digest.Reset();
byte[] key = ((KeyParameter)parameters).GetKey();
int num = key.Length;
if (num > this.blockLength)
{
this.digest.BlockUpdate(key, 0, num);
this.digest.DoFinal(this.inputPad, 0);
num = this.digestSize;
}
else
{
Array.Copy(key, 0, this.inputPad, 0, num);
}
Array.Clear(this.inputPad, num, this.blockLength - num);
Array.Copy(this.inputPad, 0, this.outputBuf, 0, this.blockLength);
HMac.XorPad(this.inputPad, this.blockLength, 54);
HMac.XorPad(this.outputBuf, this.blockLength, 92);
if (this.digest is IMemoable)
{
this.opadState = ((IMemoable)this.digest).Copy();
((IDigest)this.opadState).BlockUpdate(this.outputBuf, 0, this.blockLength);
}
this.digest.BlockUpdate(this.inputPad, 0, this.inputPad.Length);
if (this.digest is IMemoable)
{
this.ipadState = ((IMemoable)this.digest).Copy();
}
}