private void NextKey()
{
SM3Digest sm3keycur = new SM3Digest(this.sm3keybase);
sm3keycur.Update((byte)(ct >> 24 & 0xff));
sm3keycur.Update((byte)(ct >> 16 & 0xff));
sm3keycur.Update((byte)(ct >> 8 & 0xff));
sm3keycur.Update((byte)(ct & 0xff));
sm3keycur.DoFinal(key, 0);
this.keyOff = 0;
this.ct++;
}
private void Reset()
{
this.sm3keybase = new SM3Digest();
this.sm3c3 = new SM3Digest();
byte[] p = byteConvert32Bytes(p2.Normalize().XCoord.ToBigInteger());
this.sm3keybase.BlockUpdate(p, 0, p.Length);
this.sm3c3.BlockUpdate(p, 0, p.Length);
p = byteConvert32Bytes(p2.Normalize().YCoord.ToBigInteger());
this.sm3keybase.BlockUpdate(p, 0, p.Length);
this.ct = 1;
NextKey();
}
public virtual byte[] Sm2GetZ(byte[] userId, ECPoint userKey)
{
SM3Digest sm3 = new SM3Digest();
byte[] p;
// userId length
int len = userId.Length * 8;
sm3.Update((byte)(len >> 8 & 0x00ff));
sm3.Update((byte)(len & 0x00ff));
// userId
sm3.BlockUpdate(userId, 0, userId.Length);
// a,b
p = ecc_a.ToByteArray();
sm3.BlockUpdate(p, 0, p.Length);
p = ecc_b.ToByteArray();
sm3.BlockUpdate(p, 0, p.Length);
// gx,gy
p = ecc_gx.ToByteArray();
sm3.BlockUpdate(p, 0, p.Length);
p = ecc_gy.ToByteArray();
sm3.BlockUpdate(p, 0, p.Length);
// x,y
p = userKey.AffineXCoord.ToBigInteger().ToByteArray();
sm3.BlockUpdate(p, 0, p.Length);
p = userKey.AffineYCoord.ToBigInteger().ToByteArray();
sm3.BlockUpdate(p, 0, p.Length);
// Z
byte[] md = new byte[sm3.GetDigestSize()];
sm3.DoFinal(md, 0);
return(md);
}