public static void SHA256Transform(byte[] pstate, byte[] pinput, byte[] pinit)
{
Sha256Computer ctx = new Sha256Computer();
Buffer.BlockCopy(pinit, 0, ctx._state, 0, 32);
ctx.Process(pinput, 0, 64);
Buffer.BlockCopy(ctx._state, 0, pstate, 0, 32);
}
public static UInt256 ComputeSha256Hash(byte[] vch, int offset, int count)
{
var sha256Computer = new Sha256Computer();
UInt256 result = new UInt256();
var data = result.bytes;
sha256Computer.Compute(vch, offset, (uint)count, data);
sha256Computer.Compute(data, data);
return result;
}