/// <summary> /// S盒 /// </summary> /// <param name="input">输入(48位)</param> /// <returns>输出(32位)</returns> private static BitArray SBox(BitArray input) { BitArray output = new BitArray(32); //8个S盒 for (int i = 0; i < 8; i++) { int col = 0; int row = 0; GenerateRowAndColumnNumber(input, i*6, out row, out col); //output.SetRange(i*4, 4, SwitchSBox(i)[row][col]); output.SetRange(i*4, 4, SB[i][row][col]); } return output; }
/// <summary> /// 生成子密钥 /// </summary> /// <param name="key">密钥</param> /// <returns></returns> private static BitArray[] GenerateKeys(BitArray key) { //置换选择1 64位->56位 key = SwapSelect1(key); //Debug.WriteLine(key.PrintInBinary()); BitArray[] output = new BitArray[16]; BitArray c = new BitArray(28); BitArray d = new BitArray(28); c.SetRange(0, 28, key); d.SetRange(0, 28, key, 28); //Debug.WriteLine(c.PrintInBinary()); //Debug.WriteLine(d.PrintInBinary()); for (int i = 0; i < 16; i++) { //密钥产生 //循环左移 c = c.ROL(LeftShiftTime[i]); d = d.ROL(LeftShiftTime[i]); //Debug.WriteLine("i:{2} C:{0} D:{1}", c.PrintInBinary(), d.PrintInBinary(), i+1); //置换选择2 output[i] = SwapSelect2(c.Append(d)); //Debug.WriteLine(output[i].PrintInBinary()); //Debug.WriteLine("C:{0} D:{1} out:{2}",c.PrintInHex(),d.PrintInHex(),output[i].PrintInHex()); } return output; }