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C/C++ Source or Header  |  1990-09-22  |  5.5 KB  |  155 lines
  1. /* --------------- tables.c --------------- */
  2.  
  3. /*
  4.  * tables for the DES algorithm
  5.  */
  6.  
  7. /* --------- macros to define a permutation table ---------- */
  8. #define ps(n)       ((unsigned char)(0x80 >> (n-1)))
  9. #define b(n,r)      ((n>r||n<r-7)?0:ps(n-(r-8)))
  10. #define p(n)        b(n, 8),b(n,16),b(n,24),b(n,32),\
  11.                     b(n,40),b(n,48),b(n,56),b(n,64)
  12. #define p3(n)       b(n, 8),b(n,16),b(n,24),b(n,32)
  13. #define q(n)        p((n)+4)
  14.  
  15. /* --------- permutation masks ----------- */
  16. unsigned char Pmask[] = {
  17.     p( 1),p( 2),p( 3),p( 4),p( 5),p( 6),p( 7),p( 8),
  18.     p( 9),p(10),p(11),p(12),p(13),p(14),p(15),p(16),
  19.     p(17),p(18),p(19),p(20),p(21),p(22),p(23),p(24),
  20.     p(25),p(26),p(27),p(28),p(29),p(30),p(31),p(32),
  21.     p(33),p(34),p(35),p(36),p(37),p(38),p(39),p(40),
  22.     p(41),p(42),p(43),p(44),p(45),p(46),p(47),p(48),
  23.     p(49),p(50),p(51),p(52),p(53),p(54),p(55),p(56),
  24.     p(57),p(58),p(59),p(60),p(61),p(62),p(63),p(64)
  25. };
  26.  
  27. /* ---------- mask for 32 bit permutation ---------- */
  28. unsigned char P3mask[] = {
  29.     p3( 1),p3( 2),p3( 3),p3( 4),p3( 5),p3( 6),p3( 7),p3( 8),
  30.     p3( 9),p3(10),p3(11),p3(12),p3(13),p3(14),p3(15),p3(16),
  31.     p3(17),p3(18),p3(19),p3(20),p3(21),p3(22),p3(23),p3(24),
  32.     p3(25),p3(26),p3(27),p3(28),p3(29),p3(30),p3(31),p3(32)
  33. };
  34.  
  35. /* ----- initial and inverse-initial permutation table ----- */
  36. unsigned char IPtbl[] = {
  37.     p(58),p(50),p(42),p(34),p(26),p(18),p(10),p( 2),
  38.     p(60),p(52),p(44),p(36),p(28),p(20),p(12),p( 4),
  39.     p(62),p(54),p(46),p(38),p(30),p(22),p(14),p( 6),
  40.     p(64),p(56),p(48),p(40),p(32),p(24),p(16),p( 8),
  41.     p(57),p(49),p(41),p(33),p(25),p(17),p( 9),p( 1),
  42.     p(59),p(51),p(43),p(35),p(27),p(19),p(11),p( 3),
  43.     p(61),p(53),p(45),p(37),p(29),p(21),p(13),p( 5),
  44.     p(63),p(55),p(47),p(39),p(31),p(23),p(15),p( 7)
  45. };
  46.  
  47. /* ---------- permutation table P for f function --------- */
  48. unsigned char Ptbl[] = {
  49.     p3(16),p3( 7),p3(20),p3(21),p3(29),p3(12),p3(28),p3(17),
  50.     p3( 1),p3(15),p3(23),p3(26),p3( 5),p3(18),p3(31),p3(10),
  51.     p3( 2),p3( 8),p3(24),p3(14),p3(32),p3(27),p3( 3),p3( 9),
  52.     p3(19),p3(13),p3(30),p3( 6),p3(22),p3(11),p3( 4),p3(25)
  53. };
  54.  
  55. /* --- table for converting six-bit to four-bit stream --- */
  56. unsigned char stbl[8][4][16] = {
  57.     /* ------------- s1 --------------- */
  58.     14,4,13,1,2,15,11,8,3,10,6,12,5,9,0,7,
  59.     0,15,7,4,14,2,13,1,10,6,12,11,9,5,3,8,
  60.     4,1,14,8,13,6,2,11,15,12,9,7,3,10,5,0,
  61.     15,12,8,2,4,9,1,7,5,11,3,14,10,0,6,13,
  62.     /* ------------- s2 --------------- */
  63.     15,1,8,14,6,11,3,4,9,7,2,13,12,0,5,10,
  64.     3,13,4,7,15,2,8,14,12,0,1,10,6,9,11,5,
  65.     0,14,7,11,10,4,13,1,5,8,12,6,9,3,2,15,
  66.     13,8,10,1,3,15,4,2,11,6,7,12,0,5,14,9,
  67.     /* ------------- s3 --------------- */
  68.     10,0,9,14,6,3,15,5,1,13,12,7,11,4,2,8,
  69.     13,7,0,9,3,4,6,10,2,8,5,14,12,11,15,1,
  70.     13,6,4,9,8,15,3,0,11,1,2,12,5,10,14,7,
  71.     1,10,13,0,6,9,8,7,4,15,14,3,11,5,2,12,
  72.     /* ------------- s4 --------------- */
  73.     7,13,14,3,0,6,9,10,1,2,8,5,11,12,4,15,
  74.     13,8,11,5,6,15,0,3,4,7,2,12,1,10,14,9,
  75.     10,6,9,0,12,11,7,13,15,1,3,14,5,2,8,4,
  76.     3,15,0,6,10,1,13,8,9,4,5,11,12,7,2,14,
  77.     /* ------------- s5 --------------- */
  78.     2,12,4,1,7,10,11,6,8,5,3,15,13,0,14,9,
  79.     14,11,2,12,4,7,13,1,5,0,15,10,3,9,8,6,
  80.     4,2,1,11,10,13,7,8,15,9,12,5,6,3,0,14,
  81.     11,8,12,7,1,14,2,13,6,15,0,9,10,4,5,3,
  82.     /* ------------- s6 --------------- */
  83.     12,1,10,15,9,2,6,8,0,13,3,4,14,7,5,11,
  84.     10,15,4,2,7,12,9,5,6,1,13,14,0,11,3,8,
  85.     9,14,15,5,2,8,12,3,7,0,4,10,1,13,11,6,
  86.     4,3,2,12,9,5,15,10,11,14,1,7,6,0,8,13,
  87.     /* ------------- s7 --------------- */
  88.     4,11,2,14,15,0,8,13,3,12,9,7,5,10,6,1,
  89.     13,0,11,7,4,9,1,10,14,3,5,12,2,15,8,6,
  90.     1,4,11,13,12,3,7,14,10,15,6,8,0,5,9,2,
  91.     6,11,13,8,1,4,10,7,9,5,0,15,14,2,3,12,
  92.     /* ------------- s8 --------------- */
  93.     13,2,8,4,6,15,11,1,10,9,3,14,5,0,12,7,
  94.     1,15,13,8,10,3,7,4,12,5,6,11,0,14,9,2,
  95.     7,11,4,1,9,12,14,2,0,6,10,13,15,3,5,8,
  96.     2,1,14,7,4,10,8,13,15,12,9,0,3,5,6,11
  97. };
  98.  
  99. /* ---- Permuted Choice 1 for Key Schedule calculation ---- */
  100. unsigned char PC1tbl[] = {
  101.     p(57),p(49),p(41),p(33),p(25),p(17),p( 9),
  102.     p( 1),p(58),p(50),p(42),p(34),p(26),p(18),
  103.     p(10),p( 2),p(59),p(51),p(43),p(35),p(27),
  104.     p(19),p(11),p( 3),p(60),p(52),p(44),p(36),
  105.     p(0),p(0),p(0),p(0),
  106.  
  107.     p(63),p(55),p(47),p(39),p(31),p(23),p(15),
  108.     p( 7),p(62),p(54),p(46),p(38),p(30),p(22),
  109.     p(14),p( 6),p(61),p(53),p(45),p(37),p(29),
  110.     p(21),p(13),p( 5),p(28),p(20),p(12),p( 4),
  111.     p(0),p(0),p(0),p(0)
  112. };
  113.  
  114. /* ---- Permuted Choice 2 for Key Schedule calculation ---- */
  115. unsigned char PC2tbl[] = {
  116.     p(14),p(17),p(11),p(24),p( 1),p( 5),p( 3),p(28),
  117.     p(15),p( 6),p(21),p(10),p(23),p(19),p(12),p( 4),
  118.     p(26),p( 8),p(16),p( 7),p(27),p(20),p(13),p( 2),
  119.  
  120.     q(41),q(52),q(31),q(37),q(47),q(55),q(30),q(40),
  121.     q(51),q(45),q(33),q(48),q(44),q(49),q(39),q(56),
  122.     q(34),q(53),q(46),q(42),q(50),q(36),q(29),q(32)
  123. };
  124.  
  125. /* ---- For extracting 6-bit strings from 64-bit string ---- */
  126. unsigned char ex6[8][2][4] = {
  127.     /* byte, >>, <<, & */
  128.     /* ---- s = 8  ---- */
  129.     0,2,0,0x3f,
  130.     0,2,0,0x3f,
  131.     /* ---- s = 7  ---- */
  132.     0,0,4,0x30,
  133.     1,4,0,0x0f,
  134.     /* ---- s = 6  ---- */
  135.     1,0,2,0x3c,
  136.     2,6,0,0x03,
  137.     /* ---- s = 5  ---- */
  138.     2,0,0,0x3f,    
  139.     2,0,0,0x3f,
  140.     /* ---- s = 4 ---- */
  141.     3,2,0,0x3f,
  142.     3,2,0,0x3f,
  143.     /* ---- s = 3 ---- */
  144.     3,0,4,0x30,
  145.     4,4,0,0x0f,
  146.     /* ---- s = 2 ---- */
  147.     4,0,2,0x3c,
  148.     5,6,0,0x03,
  149.     /* ---- s = 1 ---- */
  150.     5,0,0,0x3f,    
  151.     5,0,0,0x3f    
  152. };
  153.  
  154.  
  155.