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  1. package cpu;
  2.  
  3. /****************************************************************************
  4. * Java-based implementation of the unix crypt(3) command
  5. *
  6. * Based upon C source code written by Eric Young, eay@psych.uq.oz.au
  7. * Java conversion by John F. Dumas, jdumas@zgs.com
  8. *
  9. * Found at http://locutus.kingwoodcable.com/jfd/crypt.html
  10. * Minor optimizations by Wes Biggs, wes@cacas.org
  11. *
  12. * Eric's original code is licensed under the BSD license. As this is
  13. * derivative, the same license applies.
  14. *
  15. * Note: cpu.Crypt.class is much smaller when compiled with javac -O
  16. ****************************************************************************/
  17.  
  18. public class Crypt {
  19. private Crypt() {} // defined so class can't be instantiated.
  20.  
  21. private static final int ITERATIONS = 16;
  22.  
  23. public static final boolean[] shifts2 = {
  24. false, false, true, true, true, true, true, true,
  25. false, true, true, true, true, true, true, false
  26. };
  27.  
  28. public static final int[][] skb = {
  29. {
  30. /* for C bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
  31. 0x00000000, 0x00000010, 0x20000000, 0x20000010,
  32. 0x00010000, 0x00010010, 0x20010000, 0x20010010,
  33. 0x00000800, 0x00000810, 0x20000800, 0x20000810,
  34. 0x00010800, 0x00010810, 0x20010800, 0x20010810,
  35. 0x00000020, 0x00000030, 0x20000020, 0x20000030,
  36. 0x00010020, 0x00010030, 0x20010020, 0x20010030,
  37. 0x00000820, 0x00000830, 0x20000820, 0x20000830,
  38. 0x00010820, 0x00010830, 0x20010820, 0x20010830,
  39. 0x00080000, 0x00080010, 0x20080000, 0x20080010,
  40. 0x00090000, 0x00090010, 0x20090000, 0x20090010,
  41. 0x00080800, 0x00080810, 0x20080800, 0x20080810,
  42. 0x00090800, 0x00090810, 0x20090800, 0x20090810,
  43. 0x00080020, 0x00080030, 0x20080020, 0x20080030,
  44. 0x00090020, 0x00090030, 0x20090020, 0x20090030,
  45. 0x00080820, 0x00080830, 0x20080820, 0x20080830,
  46. 0x00090820, 0x00090830, 0x20090820, 0x20090830,
  47. },
  48. {
  49. /* for C bits (numbered as per FIPS 46) 7 8 10 11 12 13 */
  50. 0x00000000, 0x02000000, 0x00002000, 0x02002000,
  51. 0x00200000, 0x02200000, 0x00202000, 0x02202000,
  52. 0x00000004, 0x02000004, 0x00002004, 0x02002004,
  53. 0x00200004, 0x02200004, 0x00202004, 0x02202004,
  54. 0x00000400, 0x02000400, 0x00002400, 0x02002400,
  55. 0x00200400, 0x02200400, 0x00202400, 0x02202400,
  56. 0x00000404, 0x02000404, 0x00002404, 0x02002404,
  57. 0x00200404, 0x02200404, 0x00202404, 0x02202404,
  58. 0x10000000, 0x12000000, 0x10002000, 0x12002000,
  59. 0x10200000, 0x12200000, 0x10202000, 0x12202000,
  60. 0x10000004, 0x12000004, 0x10002004, 0x12002004,
  61. 0x10200004, 0x12200004, 0x10202004, 0x12202004,
  62. 0x10000400, 0x12000400, 0x10002400, 0x12002400,
  63. 0x10200400, 0x12200400, 0x10202400, 0x12202400,
  64. 0x10000404, 0x12000404, 0x10002404, 0x12002404,
  65. 0x10200404, 0x12200404, 0x10202404, 0x12202404,
  66. },
  67. {
  68. /* for C bits (numbered as per FIPS 46) 14 15 16 17 19 20 */
  69. 0x00000000, 0x00000001, 0x00040000, 0x00040001,
  70. 0x01000000, 0x01000001, 0x01040000, 0x01040001,
  71. 0x00000002, 0x00000003, 0x00040002, 0x00040003,
  72. 0x01000002, 0x01000003, 0x01040002, 0x01040003,
  73. 0x00000200, 0x00000201, 0x00040200, 0x00040201,
  74. 0x01000200, 0x01000201, 0x01040200, 0x01040201,
  75. 0x00000202, 0x00000203, 0x00040202, 0x00040203,
  76. 0x01000202, 0x01000203, 0x01040202, 0x01040203,
  77. 0x08000000, 0x08000001, 0x08040000, 0x08040001,
  78. 0x09000000, 0x09000001, 0x09040000, 0x09040001,
  79. 0x08000002, 0x08000003, 0x08040002, 0x08040003,
  80. 0x09000002, 0x09000003, 0x09040002, 0x09040003,
  81. 0x08000200, 0x08000201, 0x08040200, 0x08040201,
  82. 0x09000200, 0x09000201, 0x09040200, 0x09040201,
  83. 0x08000202, 0x08000203, 0x08040202, 0x08040203,
  84. 0x09000202, 0x09000203, 0x09040202, 0x09040203,
  85. },
  86. {
  87. /* for C bits (numbered as per FIPS 46) 21 23 24 26 27 28 */
  88. 0x00000000, 0x00100000, 0x00000100, 0x00100100,
  89. 0x00000008, 0x00100008, 0x00000108, 0x00100108,
  90. 0x00001000, 0x00101000, 0x00001100, 0x00101100,
  91. 0x00001008, 0x00101008, 0x00001108, 0x00101108,
  92. 0x04000000, 0x04100000, 0x04000100, 0x04100100,
  93. 0x04000008, 0x04100008, 0x04000108, 0x04100108,
  94. 0x04001000, 0x04101000, 0x04001100, 0x04101100,
  95. 0x04001008, 0x04101008, 0x04001108, 0x04101108,
  96. 0x00020000, 0x00120000, 0x00020100, 0x00120100,
  97. 0x00020008, 0x00120008, 0x00020108, 0x00120108,
  98. 0x00021000, 0x00121000, 0x00021100, 0x00121100,
  99. 0x00021008, 0x00121008, 0x00021108, 0x00121108,
  100. 0x04020000, 0x04120000, 0x04020100, 0x04120100,
  101. 0x04020008, 0x04120008, 0x04020108, 0x04120108,
  102. 0x04021000, 0x04121000, 0x04021100, 0x04121100,
  103. 0x04021008, 0x04121008, 0x04021108, 0x04121108,
  104. },
  105. {
  106. /* for D bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
  107. 0x00000000, 0x10000000, 0x00010000, 0x10010000,
  108. 0x00000004, 0x10000004, 0x00010004, 0x10010004,
  109. 0x20000000, 0x30000000, 0x20010000, 0x30010000,
  110. 0x20000004, 0x30000004, 0x20010004, 0x30010004,
  111. 0x00100000, 0x10100000, 0x00110000, 0x10110000,
  112. 0x00100004, 0x10100004, 0x00110004, 0x10110004,
  113. 0x20100000, 0x30100000, 0x20110000, 0x30110000,
  114. 0x20100004, 0x30100004, 0x20110004, 0x30110004,
  115. 0x00001000, 0x10001000, 0x00011000, 0x10011000,
  116. 0x00001004, 0x10001004, 0x00011004, 0x10011004,
  117. 0x20001000, 0x30001000, 0x20011000, 0x30011000,
  118. 0x20001004, 0x30001004, 0x20011004, 0x30011004,
  119. 0x00101000, 0x10101000, 0x00111000, 0x10111000,
  120. 0x00101004, 0x10101004, 0x00111004, 0x10111004,
  121. 0x20101000, 0x30101000, 0x20111000, 0x30111000,
  122. 0x20101004, 0x30101004, 0x20111004, 0x30111004,
  123. },
  124. {
  125. /* for D bits (numbered as per FIPS 46) 8 9 11 12 13 14 */
  126. 0x00000000, 0x08000000, 0x00000008, 0x08000008,
  127. 0x00000400, 0x08000400, 0x00000408, 0x08000408,
  128. 0x00020000, 0x08020000, 0x00020008, 0x08020008,
  129. 0x00020400, 0x08020400, 0x00020408, 0x08020408,
  130. 0x00000001, 0x08000001, 0x00000009, 0x08000009,
  131. 0x00000401, 0x08000401, 0x00000409, 0x08000409,
  132. 0x00020001, 0x08020001, 0x00020009, 0x08020009,
  133. 0x00020401, 0x08020401, 0x00020409, 0x08020409,
  134. 0x02000000, 0x0A000000, 0x02000008, 0x0A000008,
  135. 0x02000400, 0x0A000400, 0x02000408, 0x0A000408,
  136. 0x02020000, 0x0A020000, 0x02020008, 0x0A020008,
  137. 0x02020400, 0x0A020400, 0x02020408, 0x0A020408,
  138. 0x02000001, 0x0A000001, 0x02000009, 0x0A000009,
  139. 0x02000401, 0x0A000401, 0x02000409, 0x0A000409,
  140. 0x02020001, 0x0A020001, 0x02020009, 0x0A020009,
  141. 0x02020401, 0x0A020401, 0x02020409, 0x0A020409,
  142. },
  143. {
  144. /* for D bits (numbered as per FIPS 46) 16 17 18 19 20 21 */
  145. 0x00000000, 0x00000100, 0x00080000, 0x00080100,
  146. 0x01000000, 0x01000100, 0x01080000, 0x01080100,
  147. 0x00000010, 0x00000110, 0x00080010, 0x00080110,
  148. 0x01000010, 0x01000110, 0x01080010, 0x01080110,
  149. 0x00200000, 0x00200100, 0x00280000, 0x00280100,
  150. 0x01200000, 0x01200100, 0x01280000, 0x01280100,
  151. 0x00200010, 0x00200110, 0x00280010, 0x00280110,
  152. 0x01200010, 0x01200110, 0x01280010, 0x01280110,
  153. 0x00000200, 0x00000300, 0x00080200, 0x00080300,
  154. 0x01000200, 0x01000300, 0x01080200, 0x01080300,
  155. 0x00000210, 0x00000310, 0x00080210, 0x00080310,
  156. 0x01000210, 0x01000310, 0x01080210, 0x01080310,
  157. 0x00200200, 0x00200300, 0x00280200, 0x00280300,
  158. 0x01200200, 0x01200300, 0x01280200, 0x01280300,
  159. 0x00200210, 0x00200310, 0x00280210, 0x00280310,
  160. 0x01200210, 0x01200310, 0x01280210, 0x01280310,
  161. },
  162. {
  163. /* for D bits (numbered as per FIPS 46) 22 23 24 25 27 28 */
  164. 0x00000000, 0x04000000, 0x00040000, 0x04040000,
  165. 0x00000002, 0x04000002, 0x00040002, 0x04040002,
  166. 0x00002000, 0x04002000, 0x00042000, 0x04042000,
  167. 0x00002002, 0x04002002, 0x00042002, 0x04042002,
  168. 0x00000020, 0x04000020, 0x00040020, 0x04040020,
  169. 0x00000022, 0x04000022, 0x00040022, 0x04040022,
  170. 0x00002020, 0x04002020, 0x00042020, 0x04042020,
  171. 0x00002022, 0x04002022, 0x00042022, 0x04042022,
  172. 0x00000800, 0x04000800, 0x00040800, 0x04040800,
  173. 0x00000802, 0x04000802, 0x00040802, 0x04040802,
  174. 0x00002800, 0x04002800, 0x00042800, 0x04042800,
  175. 0x00002802, 0x04002802, 0x00042802, 0x04042802,
  176. 0x00000820, 0x04000820, 0x00040820, 0x04040820,
  177. 0x00000822, 0x04000822, 0x00040822, 0x04040822,
  178. 0x00002820, 0x04002820, 0x00042820, 0x04042820,
  179. 0x00002822, 0x04002822, 0x00042822, 0x04042822,
  180. }
  181. };
  182.  
  183. private static final int SPtrans[][] = {
  184. {
  185. /* nibble 0 */
  186. 0x00820200, 0x00020000, 0x80800000, 0x80820200,
  187. 0x00800000, 0x80020200, 0x80020000, 0x80800000,
  188. 0x80020200, 0x00820200, 0x00820000, 0x80000200,
  189. 0x80800200, 0x00800000, 0x00000000, 0x80020000,
  190. 0x00020000, 0x80000000, 0x00800200, 0x00020200,
  191. 0x80820200, 0x00820000, 0x80000200, 0x00800200,
  192. 0x80000000, 0x00000200, 0x00020200, 0x80820000,
  193. 0x00000200, 0x80800200, 0x80820000, 0x00000000,
  194. 0x00000000, 0x80820200, 0x00800200, 0x80020000,
  195. 0x00820200, 0x00020000, 0x80000200, 0x00800200,
  196. 0x80820000, 0x00000200, 0x00020200, 0x80800000,
  197. 0x80020200, 0x80000000, 0x80800000, 0x00820000,
  198. 0x80820200, 0x00020200, 0x00820000, 0x80800200,
  199. 0x00800000, 0x80000200, 0x80020000, 0x00000000,
  200. 0x00020000, 0x00800000, 0x80800200, 0x00820200,
  201. 0x80000000, 0x80820000, 0x00000200, 0x80020200,
  202. },
  203. {
  204. /* nibble 1 */
  205. 0x10042004, 0x00000000, 0x00042000, 0x10040000,
  206. 0x10000004, 0x00002004, 0x10002000, 0x00042000,
  207. 0x00002000, 0x10040004, 0x00000004, 0x10002000,
  208. 0x00040004, 0x10042000, 0x10040000, 0x00000004,
  209. 0x00040000, 0x10002004, 0x10040004, 0x00002000,
  210. 0x00042004, 0x10000000, 0x00000000, 0x00040004,
  211. 0x10002004, 0x00042004, 0x10042000, 0x10000004,
  212. 0x10000000, 0x00040000, 0x00002004, 0x10042004,
  213. 0x00040004, 0x10042000, 0x10002000, 0x00042004,
  214. 0x10042004, 0x00040004, 0x10000004, 0x00000000,
  215. 0x10000000, 0x00002004, 0x00040000, 0x10040004,
  216. 0x00002000, 0x10000000, 0x00042004, 0x10002004,
  217. 0x10042000, 0x00002000, 0x00000000, 0x10000004,
  218. 0x00000004, 0x10042004, 0x00042000, 0x10040000,
  219. 0x10040004, 0x00040000, 0x00002004, 0x10002000,
  220. 0x10002004, 0x00000004, 0x10040000, 0x00042000,
  221. },
  222. {
  223. /* nibble 2 */
  224. 0x41000000, 0x01010040, 0x00000040, 0x41000040,
  225. 0x40010000, 0x01000000, 0x41000040, 0x00010040,
  226. 0x01000040, 0x00010000, 0x01010000, 0x40000000,
  227. 0x41010040, 0x40000040, 0x40000000, 0x41010000,
  228. 0x00000000, 0x40010000, 0x01010040, 0x00000040,
  229. 0x40000040, 0x41010040, 0x00010000, 0x41000000,
  230. 0x41010000, 0x01000040, 0x40010040, 0x01010000,
  231. 0x00010040, 0x00000000, 0x01000000, 0x40010040,
  232. 0x01010040, 0x00000040, 0x40000000, 0x00010000,
  233. 0x40000040, 0x40010000, 0x01010000, 0x41000040,
  234. 0x00000000, 0x01010040, 0x00010040, 0x41010000,
  235. 0x40010000, 0x01000000, 0x41010040, 0x40000000,
  236. 0x40010040, 0x41000000, 0x01000000, 0x41010040,
  237. 0x00010000, 0x01000040, 0x41000040, 0x00010040,
  238. 0x01000040, 0x00000000, 0x41010000, 0x40000040,
  239. 0x41000000, 0x40010040, 0x00000040, 0x01010000,
  240. },
  241. {
  242. /* nibble 3 */
  243. 0x00100402, 0x04000400, 0x00000002, 0x04100402,
  244. 0x00000000, 0x04100000, 0x04000402, 0x00100002,
  245. 0x04100400, 0x04000002, 0x04000000, 0x00000402,
  246. 0x04000002, 0x00100402, 0x00100000, 0x04000000,
  247. 0x04100002, 0x00100400, 0x00000400, 0x00000002,
  248. 0x00100400, 0x04000402, 0x04100000, 0x00000400,
  249. 0x00000402, 0x00000000, 0x00100002, 0x04100400,
  250. 0x04000400, 0x04100002, 0x04100402, 0x00100000,
  251. 0x04100002, 0x00000402, 0x00100000, 0x04000002,
  252. 0x00100400, 0x04000400, 0x00000002, 0x04100000,
  253. 0x04000402, 0x00000000, 0x00000400, 0x00100002,
  254. 0x00000000, 0x04100002, 0x04100400, 0x00000400,
  255. 0x04000000, 0x04100402, 0x00100402, 0x00100000,
  256. 0x04100402, 0x00000002, 0x04000400, 0x00100402,
  257. 0x00100002, 0x00100400, 0x04100000, 0x04000402,
  258. 0x00000402, 0x04000000, 0x04000002, 0x04100400,
  259. },
  260. {
  261. /* nibble 4 */
  262. 0x02000000, 0x00004000, 0x00000100, 0x02004108,
  263. 0x02004008, 0x02000100, 0x00004108, 0x02004000,
  264. 0x00004000, 0x00000008, 0x02000008, 0x00004100,
  265. 0x02000108, 0x02004008, 0x02004100, 0x00000000,
  266. 0x00004100, 0x02000000, 0x00004008, 0x00000108,
  267. 0x02000100, 0x00004108, 0x00000000, 0x02000008,
  268. 0x00000008, 0x02000108, 0x02004108, 0x00004008,
  269. 0x02004000, 0x00000100, 0x00000108, 0x02004100,
  270. 0x02004100, 0x02000108, 0x00004008, 0x02004000,
  271. 0x00004000, 0x00000008, 0x02000008, 0x02000100,
  272. 0x02000000, 0x00004100, 0x02004108, 0x00000000,
  273. 0x00004108, 0x02000000, 0x00000100, 0x00004008,
  274. 0x02000108, 0x00000100, 0x00000000, 0x02004108,
  275. 0x02004008, 0x02004100, 0x00000108, 0x00004000,
  276. 0x00004100, 0x02004008, 0x02000100, 0x00000108,
  277. 0x00000008, 0x00004108, 0x02004000, 0x02000008,
  278. },
  279. {
  280. /* nibble 5 */
  281. 0x20000010, 0x00080010, 0x00000000, 0x20080800,
  282. 0x00080010, 0x00000800, 0x20000810, 0x00080000,
  283. 0x00000810, 0x20080810, 0x00080800, 0x20000000,
  284. 0x20000800, 0x20000010, 0x20080000, 0x00080810,
  285. 0x00080000, 0x20000810, 0x20080010, 0x00000000,
  286. 0x00000800, 0x00000010, 0x20080800, 0x20080010,
  287. 0x20080810, 0x20080000, 0x20000000, 0x00000810,
  288. 0x00000010, 0x00080800, 0x00080810, 0x20000800,
  289. 0x00000810, 0x20000000, 0x20000800, 0x00080810,
  290. 0x20080800, 0x00080010, 0x00000000, 0x20000800,
  291. 0x20000000, 0x00000800, 0x20080010, 0x00080000,
  292. 0x00080010, 0x20080810, 0x00080800, 0x00000010,
  293. 0x20080810, 0x00080800, 0x00080000, 0x20000810,
  294. 0x20000010, 0x20080000, 0x00080810, 0x00000000,
  295. 0x00000800, 0x20000010, 0x20000810, 0x20080800,
  296. 0x20080000, 0x00000810, 0x00000010, 0x20080010,
  297. },
  298. {
  299. /* nibble 6 */
  300. 0x00001000, 0x00000080, 0x00400080, 0x00400001,
  301. 0x00401081, 0x00001001, 0x00001080, 0x00000000,
  302. 0x00400000, 0x00400081, 0x00000081, 0x00401000,
  303. 0x00000001, 0x00401080, 0x00401000, 0x00000081,
  304. 0x00400081, 0x00001000, 0x00001001, 0x00401081,
  305. 0x00000000, 0x00400080, 0x00400001, 0x00001080,
  306. 0x00401001, 0x00001081, 0x00401080, 0x00000001,
  307. 0x00001081, 0x00401001, 0x00000080, 0x00400000,
  308. 0x00001081, 0x00401000, 0x00401001, 0x00000081,
  309. 0x00001000, 0x00000080, 0x00400000, 0x00401001,
  310. 0x00400081, 0x00001081, 0x00001080, 0x00000000,
  311. 0x00000080, 0x00400001, 0x00000001, 0x00400080,
  312. 0x00000000, 0x00400081, 0x00400080, 0x00001080,
  313. 0x00000081, 0x00001000, 0x00401081, 0x00400000,
  314. 0x00401080, 0x00000001, 0x00001001, 0x00401081,
  315. 0x00400001, 0x00401080, 0x00401000, 0x00001001,
  316. },
  317. {
  318. /* nibble 7 */
  319. 0x08200020, 0x08208000, 0x00008020, 0x00000000,
  320. 0x08008000, 0x00200020, 0x08200000, 0x08208020,
  321. 0x00000020, 0x08000000, 0x00208000, 0x00008020,
  322. 0x00208020, 0x08008020, 0x08000020, 0x08200000,
  323. 0x00008000, 0x00208020, 0x00200020, 0x08008000,
  324. 0x08208020, 0x08000020, 0x00000000, 0x00208000,
  325. 0x08000000, 0x00200000, 0x08008020, 0x08200020,
  326. 0x00200000, 0x00008000, 0x08208000, 0x00000020,
  327. 0x00200000, 0x00008000, 0x08000020, 0x08208020,
  328. 0x00008020, 0x08000000, 0x00000000, 0x00208000,
  329. 0x08200020, 0x08008020, 0x08008000, 0x00200020,
  330. 0x08208000, 0x00000020, 0x00200020, 0x08008000,
  331. 0x08208020, 0x00200000, 0x08200000, 0x08000020,
  332. 0x00208000, 0x00008020, 0x08008020, 0x08200000,
  333. 0x00000020, 0x08208000, 0x00208020, 0x00000000,
  334. 0x08000000, 0x08200020, 0x00008000, 0x00208020
  335. }
  336. };
  337.  
  338. private static final int byteToUnsigned(byte b) {
  339. int value = (int) b;
  340. return (value >= 0) ? value : value + 256;
  341. }
  342.  
  343. public static int fourBytesToInt(byte b[], int offset) {
  344. return byteToUnsigned(b[offset++])
  345. | (byteToUnsigned(b[offset++]) << 8)
  346. | (byteToUnsigned(b[offset++]) << 16)
  347. | (byteToUnsigned(b[offset]) << 24);
  348. }
  349.  
  350. public static final void intToFourBytes(int iValue, byte b[], int offset) {
  351. b[offset++] = (byte)((iValue) & 0xff);
  352. b[offset++] = (byte)((iValue >>> 8 ) & 0xff);
  353. b[offset++] = (byte)((iValue >>> 16) & 0xff);
  354. b[offset] = (byte)((iValue >>> 24) & 0xff);
  355. }
  356.  
  357. public static final void PERM_OP(int a, int b, int n, int m, int results[]) {
  358. int t;
  359.  
  360. t = ((a >>> n) ^ b) & m;
  361. a ^= t << n;
  362. b ^= t;
  363.  
  364. results[0] = a;
  365. results[1] = b;
  366. }
  367.  
  368. public static final int HPERM_OP(int a, int n, int m) {
  369. int t;
  370.  
  371. t = ((a << (16 - n)) ^ a) & m;
  372. a = a ^ t ^ (t >>> (16 - n));
  373.  
  374. return a;
  375. }
  376.  
  377. public static int [] des_set_key(byte key[]) {
  378. int schedule[] = new int [ITERATIONS * 2];
  379.  
  380. int c = fourBytesToInt(key, 0);
  381. int d = fourBytesToInt(key, 4);
  382.  
  383. int results[] = new int[2];
  384.  
  385. PERM_OP(d, c, 4, 0x0f0f0f0f, results);
  386. d = results[0]; c = results[1];
  387.  
  388. c = HPERM_OP(c, -2, 0xcccc0000);
  389. d = HPERM_OP(d, -2, 0xcccc0000);
  390.  
  391. PERM_OP(d, c, 1, 0x55555555, results);
  392. d = results[0]; c = results[1];
  393.  
  394. PERM_OP(c, d, 8, 0x00ff00ff, results);
  395. c = results[0]; d = results[1];
  396.  
  397. PERM_OP(d, c, 1, 0x55555555, results);
  398. d = results[0]; c = results[1];
  399.  
  400. d = (((d & 0x000000ff) << 16) | (d & 0x0000ff00) |
  401. ((d & 0x00ff0000) >>> 16) | ((c & 0xf0000000) >>> 4));
  402. c &= 0x0fffffff;
  403.  
  404. int s, t;
  405. int j = 0;
  406.  
  407. for(int i = 0; i < ITERATIONS; i ++) {
  408. if(shifts2[i]) {
  409. c = (c >>> 2) | (c << 26);
  410. d = (d >>> 2) | (d << 26);
  411. } else {
  412. c = (c >>> 1) | (c << 27);
  413. d = (d >>> 1) | (d << 27);
  414. }
  415.  
  416. c &= 0x0fffffff;
  417. d &= 0x0fffffff;
  418.  
  419. s = skb[0][ (c ) & 0x3f ]|
  420. skb[1][((c >>> 6) & 0x03) | ((c >>> 7) & 0x3c)]|
  421. skb[2][((c >>> 13) & 0x0f) | ((c >>> 14) & 0x30)]|
  422. skb[3][((c >>> 20) & 0x01) | ((c >>> 21) & 0x06) |
  423. ((c >>> 22) & 0x38)];
  424.  
  425. t = skb[4][ (d ) & 0x3f ]|
  426. skb[5][((d >>> 7) & 0x03) | ((d >>> 8) & 0x3c)]|
  427. skb[6][ (d >>>15) & 0x3f ]|
  428. skb[7][((d >>>21) & 0x0f) | ((d >>> 22) & 0x30)];
  429.  
  430. schedule[j++] = ((t << 16) | (s & 0x0000ffff)) & 0xffffffff;
  431. s = ((s >>> 16) | (t & 0xffff0000));
  432.  
  433. s = (s << 4) | (s >>> 28);
  434. schedule[j++] = s & 0xffffffff;
  435. }
  436. return schedule;
  437. }
  438.  
  439. public static final int D_ENCRYPT(int L, int R, int S, int E0, int E1, int s[]) {
  440. int t, u, v;
  441.  
  442. v = R ^ (R >>> 16);
  443. u = v & E0;
  444. v = v & E1;
  445. u = (u ^ (u << 16)) ^ R ^ s[S];
  446. t = (v ^ (v << 16)) ^ R ^ s[S + 1];
  447. t = (t >>> 4) | (t << 28);
  448.  
  449. L ^= SPtrans[1][(t ) & 0x3f] |
  450. SPtrans[3][(t >>> 8) & 0x3f] |
  451. SPtrans[5][(t >>> 16) & 0x3f] |
  452. SPtrans[7][(t >>> 24) & 0x3f] |
  453. SPtrans[0][(u ) & 0x3f] |
  454. SPtrans[2][(u >>> 8) & 0x3f] |
  455. SPtrans[4][(u >>> 16) & 0x3f] |
  456. SPtrans[6][(u >>> 24) & 0x3f];
  457.  
  458. return L;
  459. }
  460.  
  461. public static final int [] body(int schedule[], int Eswap0, int Eswap1) {
  462. int left = 0;
  463. int right = 0;
  464. int t = 0;
  465.  
  466. for (int j = 0; j < 25; j ++) {
  467. for (int i = 0; i < ITERATIONS * 2; i += 4) {
  468. left = D_ENCRYPT(left, right, i, Eswap0, Eswap1, schedule);
  469. right = D_ENCRYPT(right, left, i + 2, Eswap0, Eswap1, schedule);
  470. }
  471. t = left;
  472. left = right;
  473. right = t;
  474. }
  475.  
  476. t = right;
  477.  
  478. right = (left >>> 1) | (left << 31);
  479. left = (t >>> 1) | (t << 31);
  480.  
  481. left &= 0xffffffff;
  482. right &= 0xffffffff;
  483.  
  484. int results[] = new int[2];
  485.  
  486. PERM_OP(right, left, 1, 0x55555555, results);
  487. right = results[0]; left = results[1];
  488.  
  489. PERM_OP(left, right, 8, 0x00ff00ff, results);
  490. left = results[0]; right = results[1];
  491.  
  492. PERM_OP(right, left, 2, 0x33333333, results);
  493. right = results[0]; left = results[1];
  494.  
  495. PERM_OP(left, right, 16, 0x0000ffff, results);
  496. left = results[0]; right = results[1];
  497.  
  498. PERM_OP(right, left, 4, 0x0f0f0f0f, results);
  499. right = results[0]; left = results[1];
  500.  
  501. int out[] = new int[2];
  502.  
  503. out[0] = left;
  504. out[1] = right;
  505.  
  506. return out;
  507. }
  508.  
  509. public static final char[] alphabet = {'.', '/', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C',
  510. 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
  511. 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's',
  512. 't', 'u', 'v', 'w', 'x', 'y', 'z'};
  513.  
  514. public static final String crypt(char[] salt, char[] original) {
  515. char[] buffer = new char [13];
  516.  
  517. char charZero = salt[0];
  518. char charOne = salt[1];
  519.  
  520. buffer[0] = charZero;
  521. buffer[1] = charOne;
  522.  
  523. int Eswap0 = 0;
  524. int Eswap1 = 0;
  525. int flag = 0;
  526.  
  527. for(int i = 0; i < alphabet.length && flag != 0b11;i++){
  528. char c = alphabet[i];
  529. if(c == charZero){
  530. Eswap0 = c;
  531. flag |= 0b01;
  532. }
  533. if(c == charOne) {
  534. Eswap1 = c;
  535. flag |= 0b10;
  536. }
  537. }
  538. byte key[] = new byte[8];
  539.  
  540. int len = Math.min(key.length,original.length);
  541. for(int i = 0; i < len; i ++)
  542. key[i] = (byte) (((int) original[i]) << 1);
  543.  
  544. int schedule[] = des_set_key(key);
  545. int out[] = body(schedule, Eswap0, Eswap1);
  546.  
  547. byte b[] = new byte[9];
  548.  
  549. intToFourBytes(out[0], b, 0);
  550. intToFourBytes(out[1], b, 4);
  551. b[8] = 0;
  552.  
  553. for(int i = 2, y = 0, u = 0x80; i < 13; i ++) {
  554. for(int j = 0, c = 0; j < 6; j ++) {
  555. c <<= 1;
  556.  
  557. if(((int)b[y] & u) != 0)
  558. c |= 1;
  559.  
  560. u >>>= 1;
  561.  
  562. if (u == 0) {
  563. y++;
  564. u = 0x80;
  565. }
  566. buffer[i] = alphabet[c];
  567. }
  568. }
  569. return new String(buffer);
  570. }
  571. }
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