commtableprg.pas

des 3des加密delphi例子；标准的des,3des算法

unit CommTablePrg;

interface
 // initial permutation (IP)   数据处理IP置换
const
  IP_Table :array[0..63]of Integer =(
	58, 50, 42, 34, 26, 18, 10, 2, 60, 52, 44, 36, 28, 20, 12, 4,
	62, 54, 46, 38, 30, 22, 14, 6, 64, 56, 48, 40, 32, 24, 16, 8,
	57, 49, 41, 33, 25, 17,  9, 1, 59, 51, 43, 35, 27, 19, 11, 3,
  61, 53, 45, 37, 29, 21, 13, 5, 63, 55, 47, 39, 31, 23, 15, 7);

  PC1_Table:array[0..55]of Integer = (
	57, 49, 41, 33, 25, 17,  9,  1, 58, 50, 42, 34, 26, 18,
	10,  2, 59, 51, 43, 35, 27, 19, 11,  3, 60, 52, 44, 36,
	63, 55, 47, 39, 31, 23, 15,  7, 62, 54, 46, 38, 30, 22,
	14,  6, 61, 53, 45, 37, 29, 21, 13,  5, 28, 20, 12,  4);

  // number left rotations of pc1
  Shift_Table:array[0..15]of Integer = (
	1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1);

  // permuted choice key (PC2)
  PC2_Table:array[0..47]of Integer = (
	14, 17, 11, 24,  1,  5,  3, 28, 15,  6, 21, 10,
	23, 19, 12,  4, 26,  8, 16,  7, 27, 20, 13,  2,
	41, 52, 31, 37, 47, 55, 30, 40, 51, 45, 33, 48,
	44, 49, 39, 56, 34, 53, 46, 42, 50, 36, 29, 32);

  // expansion operation matrix (E)
  E_Table:array[0..47]of Integer =(32,  1,  2,  3,  4,  5,  4,  5,  6,  7,  8,  9,
	 8,  9, 10, 11, 12, 13, 12, 13, 14, 15, 16, 17,
	16, 17, 18, 19, 20, 21, 20, 21, 22, 23, 24, 25,
	24, 25, 26, 27, 28, 29, 28, 29, 30, 31, 32,  1);

  // final permutation IP^-1 
  IPR_Table:array[0..63]of Char =(
	Char(40), Char(8), Char(48), Char(16), Char(56), Char(24), Char(64), Char(32), Char(39),
  Char(7), Char(47), Char(15), Char(55), Char(23), Char(63), Char(31),Char(38), Char(6),
  Char(46), Char(14), Char(54), Char(22), Char(62), Char(30), Char(37), Char(5), Char(45),
  Char(13), Char(53), Char(21), Char(61), Char(29), Char(36), Char(4), Char(44), Char(12),
  Char(52), Char(20), Char(60), Char(28), Char(35), Char(3), Char(43), Char(11), Char(51),
  Char(19), Char(59), Char(27), Char(34), Char(2), Char(42), Char(10), Char(50), Char(18),
  Char(58), Char(26), Char(33), Char(1), Char(41),  Char(9), Char(49), Char(17), Char(57), Char(25));

  // 32-bit permutation function P used on the output of the S-boxes 
  P_Table:array[0..31]of Char = (
	Char(16), Char(7), Char(20), Char(21), Char(29), Char(12), Char(28),
  Char(17), Char(1),  Char(15), Char(23), Char(26), Char(5),  Char(18),
  Char(31), Char(10), Char(2),  Char(8), Char(24), Char(14), Char(32),
  Char(27), Char(3),  Char(9),  Char(19), Char(13), Char(30), Char(6),
  Char(22), Char(11), Char(4),  Char(25));

// The (in)famous S-boxes
  S_Box:array[0..7]of array[0..3,0..15]of Integer = (
  //S1
   ((14,  4,	13,  1,  2, 15, 11,  8,  3, 10,  6, 12,  5,  9,  0,  7),
	 (0, 15,  7,  4, 14,  2, 13,  1, 10,  6, 12, 11,  9,  5,  3,  8),
	 (4,  1, 14,  8, 13,  6,  2, 11, 15, 12,  9,  7,  3, 10,  5,  0),
   (15, 12,  8,  2,  4,  9,  1,  7,  5, 11,  3, 14, 10,  0,  6, 13)),

	// S2
  ((15,  1,  8, 14,  6, 11,  3,  4,  9,  7,  2, 13, 12,  0,  5, 10),
	 (3, 13,  4,  7, 15,  2,  8, 14, 12,  0,  1, 10,  6,  9, 11,  5),
	 (0, 14,  7, 11, 10,  4, 13,  1,  5,  8, 12,  6,  9,  3,  2, 15),
   (13,  8, 10,  1,  3, 15,  4,  2, 11,  6,  7, 12,  0,  5, 14,  9)),

	// S3
  ((10,  0,  9, 14,  6,  3, 15,  5,  1, 13, 12,  7, 11,  4,  2,  8),
	(13,  7,  0,  9,  3,  4,  6, 10,  2,  8,  5, 14, 12, 11, 15,  1),
	(13,  6,  4,  9,  8, 15,  3,  0, 11,  1,  2, 12,  5, 10, 14,  7),
  (1, 10, 13,  0,  6,  9,  8,  7,  4, 15, 14,  3, 11,  5,  2, 12)),
	// S4
  ((7, 13, 14,  3,  0,  6,  9, 10,  1,  2,  8,  5, 11, 12,  4, 15),
	(13,  8, 11,  5,  6, 15,  0,  3,  4,  7,  2, 12,  1, 10, 14,  9),
	(10,  6,  9,  0, 12, 11,  7, 13, 15,  1,  3, 14,  5,  2,  8,  4),
  (3, 15,  0,  6, 10,  1, 13,  8,  9,  4,  5, 11, 12,  7,  2, 14)),
	// S5
  ((2, 12,  4,  1,  7, 10, 11,  6,  8,  5,  3, 15, 13,  0, 14,  9),
	(14, 11,  2, 12,  4,  7, 13,  1,  5,  0, 15, 10,  3,  9,  8,  6),
	 (4,  2,  1, 11, 10, 13,  7,  8, 15,  9, 12,  5,  6,  3,  0, 14),
   (11,  8, 12,  7,  1, 14,  2, 13,  6, 15,  0,  9, 10,  4,  5,  3)),
	// S6
  ((12,  1, 10, 15,  9,  2,  6,  8,  0, 13,  3,  4, 14,  7,  5, 11),
	(10, 15,  4,  2,  7, 12,  9,  5,  6,  1, 13, 14,  0, 11,  3,  8),
	 (9, 14, 15,  5,  2,  8, 12,  3,  7,  0,  4, 10,  1, 13, 11,  6),
   (4,  3,  2, 12,  9,  5, 15, 10, 11, 14,  1,  7,  6,  0,  8, 13)),
	// S7
  ((4, 11,  2, 14, 15,  0,  8, 13,  3, 12,  9,  7,  5, 10,  6,  1),
	(13,  0, 11,  7,  4,  9,  1, 10, 14,  3,  5, 12,  2, 15,  8,  6),
	 (1,  4, 11, 13, 12,  3,  7, 14, 10, 15,  6,  8,  0,  5,  9,  2),
   (6, 11, 13,  8,  1,  4, 10,  7,  9,  5,  0, 15, 14,  2,  3, 12)),
	// S8
  ((13,  2,  8,  4,  6, 15, 11,  1, 10,  9,  3, 14,  5,  0, 12,  7),
	 (1, 15, 13,  8, 10,  3,  7,  4, 12,  5,  6, 11,  0, 14,  9,  2),
	 (7, 11,  4,  1,  9, 12, 14,  2,  0,  6, 10, 13, 15,  3,  5,  8),
   (2,  1, 14,  7,  4, 10,  8, 13, 15, 12,  9,  0,  3,  5,  6, 11)));

type
  TSubKey = array[0..15,0..47]of Char;

implementation

end.