/* convert from byte array to point */
public static ECP FromBytes(sbyte[] b)
{
sbyte[] t = new sbyte[BIG.MODBYTES];
BIG p = new BIG(ROM.Modulus);
for (int i = 0; i < BIG.MODBYTES; i++)
{
t[i] = b[i + 1];
}
BIG px = BIG.FromBytes(t);
if (BIG.Comp(px, p) >= 0)
{
return(new ECP());
}
if (CURVETYPE == MONTGOMERY)
{
return(new ECP(px));
}
if (b[0] == 0x04)
{
for (int i = 0; i < BIG.MODBYTES; i++)
{
t[i] = b[i + BIG.MODBYTES + 1];
}
BIG py = BIG.FromBytes(t);
if (BIG.Comp(py, p) >= 0)
{
return(new ECP());
}
return(new ECP(px, py));
}
if (b[0] == 0x02 || b[0] == 0x03)
{
return(new ECP(px, (int)(b[0] & 1)));
}
return(new ECP());
}