// Copyright © 2001 by Neal R. Wagner. All rights reserved.
//   Any use of this code must include a reference to the author.
//
// AESdecrypt: AES decryption
// Copy: copy arrays of bytes
public class Copy {
   private static final int Nb = 4;
   // copy: copy in to state
   public static void copy(byte[][] state, byte[] in) {
      int inLoc = 0;
      for (int c = 0; c < Nb; c++)
         for (int r = 0; r < 4; r++)
            state[r][c] = in[inLoc++];
   }
            
   // copy: copy state to out
   public static void copy(byte[] out, byte[][] state) {
      int outLoc = 0;
      for (int c = 0; c < Nb; c++)
         for (int r = 0; r < 4; r++)
            out[outLoc++] = state[r][c];
   }      
}