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  1. package com.hurlant.crypto.symmetric
  2. {
  3.    import com.hurlant.util.Memory;
  4.    import flash.utils.ByteArray;
  5.    
  6.    public class ButtHoleKey implements ISymmetricKey
  7.    {
  8.      
  9.       private static const KP:Array = [608135816,-2052912941,320440878,57701188,-1542899678,698298832,137296536,-330404727,1160258022,953160567,-1101764913,887688300,-1062458953,-914599715,1065670069,-1253635817,-1843997223,-1988494565];
  10.      
  11.       private static const KS0:Array = [-785314906,-1730169428,805139163,-803545161,-1193168915,1780907670,-1166241723,-248741991,614570311,-1282315017,134345442,-2054226922,1667834072,1901547113,-1537671517,-191677058,227898511,1921955416,1904987480,-2112533778,2069144605,-1034266187,-1674521287,720527379,-976113629,677414384,-901678824,-1193592593,-1904616272,1614419982,1822297739,-1340175810,-686458943,-1120842969,2024746970,1432378464,-430627341,-1437226092,1464375394,1676153920,1439316330,715854006,-1261675468,289532110,-1588296017,2087905683,-1276242927,1668267050,732546397,1947742710,-832815594,-1685613794,-1344882125,1814351708,2050118529,680887927,999245976,1800124847,-994056165,1713906067,1641548236,-81679983,1216130144,1575780402,-276538019,-377129551,-601480446,-345695352,596196993,-745100091,258830323,-2081144263,772490370,-1534844924,1774776394,-1642095778,566650946,-152474470,1728879713,-1412200208,1783734482,-665571480,-1777359064,-1420741725,1861159788,326777828,-1170476976,2130389656,-1578015459,967770486,1724537150,-2109534584,-1930525159,1164943284,2105845187,998989502,-529566248,-2050940813,1075463327,1455516326,1322494562,910128902,469688178,1117454909,936433444,-804646328,-619713837,1240580251,122909385,-2137449605,634681816,-152510729,-469872614,-1233564613,-1754472259,79693498,-1045868618,1084186820,1583128258,426386531,1761308591,1047286709,322548459,995290223,1845252383,-1691314900,-863943356,-1352745719,-1092366332,-567063811,1712269319,422464435,-1060394921,1170764815,-771006663,-1177289765,1434042557,442511882,-694091578,1076654713,1738483198,-81812532,-1901729288,-617471240,1014306527,-43947243,793779912,-1392160085,842905082,-48003232,1395751752,1040244610,-1638115397,-898659168,445077038,-552113701,-717051658,679411651,-1402522938,-1940957837,1767581616,-1144366904,-503340195,-1192226400,284835224,-48135240,1258075500,768725851,-1705778055,-1225243291,-762426948,1274779536,-505548070,-1530167757,1660621633,-823867672,-283063590,913787905,-797008130,737222580,-1780753843,-1366257256,-357724559,1804850592,-795946544,-1345903136,-1908647121,-1904896841,-1879645445,-233690268,-2004305902,-1878134756,1336762016,1754252060,-774901359,-1280786003,791618072,-1106372745,-361419266,-1962795103,-442446833,-1250986776,413987798,-829824359,-1264037920,-49028937,2093235073,-760370983,375366246,-2137688315,-1815317740,555357303,-424861595,2008414854,-950779147,-73583153,-338841844,2067696032,-700376109,-1373733303,2428461,544322398,577241275,1471733935,610547355,-267798242,1432588573,1507829418,2025931657,-648391809,545086370,48609733,-2094660746,1653985193,298326376,1316178497,-1287180854,2064951626,458293330,-1705826027,-703637697,-1130641692,727753846,-2115603456,146436021,1461446943,-224990101,705550613,-1235000031,-407242314,-13368018,-981117340,1404054877,-1449160799,146425753,1854211946];
  12.      
  13.       private static const KS1:Array = [1266315497,-1246549692,-613086930,-1004984797,-1385257296,1235738493,-1662099272,-1880247706,-324367247,1771706367,1449415276,-1028546847,422970021,1963543593,-1604775104,-468174274,1062508698,1531092325,1804592342,-1711849514,-1580033017,-269995787,1294809318,-265986623,1289560198,-2072974554,1669523910,35572830,157838143,1052438473,1016535060,1802137761,1753167236,1386275462,-1214491899,-1437595849,1040679964,2145300060,-1904392980,1461121720,-1338320329,-263189491,-266592508,33600511,-1374882534,1018524850,629373528,-603381315,-779021319,2091462646,-1808644237,586499841,988145025,935516892,-927631820,-1695294041,-1455136442,265290510,-322386114,-1535828415,-499593831,1005194799,847297441,406762289,1314163512,1332590856,1866599683,-167115585,750260880,613907577,1450815602,-1129346641,-560302305,-644675568,-1282691566,-590397650,1427272223,778793252,1343938022,-1618686585,2052605720,1946737175,-1130390852,-380928628,-327488454,-612033030,1661551462,-1000029230,-283371449,840292616,-582796489,616741398,312560963,711312465,1351876610,322626781,1910503582,271666773,-2119403562,1594956187,70604529,-677132437,1007753275,1495573769,-225450259,-1745748998,-1631928532,504708206,-2031925904,-353800271,-2045878774,1514023603,1998579484,1312622330,694541497,-1712906993,-2143385130,1382467621,776784248,-1676627094,-971698502,-1797068168,-1510196141,503983604,-218673497,907881277,423175695,432175456,1378068232,-149744970,-340918674,-356311194,-474200683,-1501837181,-1317062703,26017576,-1020076561,-1100195163,1700274565,1756076034,-288447217,-617638597,720338349,1533947780,354530856,688349552,-321042571,1637815568,332179504,-345916010,53804574,-1442618417,-1250730864,1282449977,-711025141,-877994476,-288586052,1617046695,-1666491221,-1292663698,1686838959,431878346,-1608291911,1700445008,1080580658,1009431731,832498133,-1071531785,-1688990951,-2023776103,-1778935426,1648197032,-130578278,-1746719369,300782431,375919233,238389289,-941219882,-1763778655,2019080857,1475708069,455242339,-1685863425,448939670,-843904277,1395535956,-1881585436,1841049896,1491858159,885456874,-30872223,-293847949,1565136089,-396052509,1108368660,540939232,1173283510,-1549095958,-613658859,-87339056,-951913406,-278217803,1699691293,1103962373,-669091426,-2038084153,-464828566,1031889488,-815619598,1535977030,-58162272,-1043876189,2132092099,1774941330,1199868427,1452454533,157007616,-1390851939,342012276,595725824,1480756522,206960106,497939518,591360097,863170706,-1919713727,-698356495,1814182875,2094937945,-873565088,1082520231,-831049106,-1509457788,435703966,-386934699,1641649973,-1452693590,-989067582,1510255612,-2146710820,-1639679442,-1018874748,-36346107,236887753,-613164077,274041037,1734335097,-479771840,-976997275,1899903192,1026095262,-244449504,356393447,-1884275382,-421290197,-612127241];
  14.      
  15.       private static const KS2:Array = [-381855128,-1803468553,-162781668,-1805047500,1091903735,1979897079,-1124832466,-727580568,-737663887,857797738,1136121015,1342202287,507115054,-1759230650,337727348,-1081374656,1301675037,-1766485585,1895095763,1721773893,-1078195732,62756741,2142006736,835421444,-1762973773,1442658625,-635090970,-1412822374,676362277,1392781812,170690266,-373920261,1759253602,-683120384,1745797284,664899054,1329594018,-393761396,-1249058810,2062866102,-1429332356,-751345684,-830954599,1080764994,553557557,-638351943,-298199125,991055499,499776247,1265440854,648242737,-354183246,980351604,-581221582,1749149687,-898096901,-83167922,-654396521,1161844396,-1169648345,1431517754,545492359,-26498633,-795437749,1437099964,-1592419752,-861329053,-1713251533,-1507177898,1060185593,1593081372,-1876348548,-34019326,69676912,-2135222948,86519011,-1782508216,-456757982,1220612927,-955283748,133810670,1090789135,1078426020,1569222167,845107691,-711212847,-222510705,1091646820,628848692,1613405280,-537335645,526609435,236106946,48312990,-1352249391,-892239595,1797494240,859738849,992217954,-289490654,-2051890674,-424014439,-562951028,765654824,-804095931,-1783130883,1685915746,-405998096,1414112111,-2021832454,-1013056217,-214004450,172450625,-1724973196,980381355,-185008841,-1475158944,-1578377736,-1726226100,-613520627,-964995824,1835478071,660984891,-590288892,-248967737,-872349789,-1254551662,1762651403,1719377915,-824476260,-1601057013,-652910941,-1156370552,1364962596,2073328063,1983633131,926494387,-871278215,-2144935273,-198299347,1749200295,-966120645,309677260,2016342300,1779581495,-1215147545,111262694,1274766160,443224088,298511866,1025883608,-488520759,1145181785,168956806,-653464466,-710153686,1689216846,-628709281,-1094719096,1692713982,-1648590761,-252198778,1618508792,1610833997,-771914938,-164094032,2001055236,-684262196,-2092799181,-266425487,-1333771897,1006657119,2006996926,-1108824540,1430667929,-1084739999,1314452623,-220332638,-193663176,-2021016126,1399257539,-927756684,-1267338667,1190975929,2062231137,-1960976508,-2073424263,-1856006686,1181637006,548689776,-1932175983,-922558900,-1190417183,-1149106736,296247880,1970579870,-1216407114,-525738999,1714227617,-1003338189,-396747006,166772364,1251581989,493813264,448347421,195405023,-1584991729,677966185,-591930749,1463355134,-1578971493,1338867538,1343315457,-1492745222,-1610435132,233230375,-1694987225,2000651841,-1017099258,1638401717,-266896856,-1057650976,6314154,819756386,300326615,590932579,1405279636,-1027467724,-1144263082,-1866680610,-335774303,-833020554,1862657033,1266418056,963775037,2089974820,-2031914401,1917689273,448879540,-744572676,-313240200,150775221,-667058989,1303187396,508620638,-1318983944,-1568336679,1817252668,1876281319,1457606340,908771278,-574175177,-677760460,-1838972398,1729034894,1080033504];
  16.      
  17.       private static const KS3:Array = [976866871,-738527793,-1413318857,1522871579,1555064734,1336096578,-746444992,-1715692610,-720269667,-1089506539,-701686658,-956251013,-1215554709,564236357,-1301368386,1781952180,1464380207,-1131123079,-962365742,1699332808,1393555694,1183702653,-713881059,1288719814,691649499,-1447410096,-1399511320,-1101077756,-1577396752,1781354906,1676643554,-1702433246,-1064713544,1126444790,-1524759638,-1661808476,-2084544070,-1679201715,-1880812208,-1167828010,673620729,-1489356063,1269405062,-279616791,-953159725,-145557542,1057255273,2012875353,-2132498155,-2018474495,-1693849939,993977747,-376373926,-1640704105,753973209,36408145,-1764381638,25011837,-774947114,2088578344,530523599,-1376601957,1524020338,1518925132,-534139791,-535190042,1202760957,-309069157,-388774771,674977740,-120232407,2031300136,2019492241,-311074731,-141160892,-472686964,352677332,-1997247046,60907813,90501309,-1007968747,1016092578,-1759044884,-1455814870,457141659,509813237,-174299397,652014361,1966332200,-1319764491,55981186,-1967506245,676427537,-1039476232,-1412673177,-861040033,1307055953,942726286,933058658,-1826555503,-361066302,-79791154,1361170020,2001714738,-1464409218,-1020707514,1222529897,1679025792,-1565652976,-580013532,1770335741,151462246,-1281735158,1682292957,1483529935,471910574,1539241949,458788160,-858652289,1807016891,-576558466,978976581,1043663428,-1129001515,1927990952,-94075717,-1922690386,-1086558393,-761535389,1412390302,-1362987237,-162634896,1947078029,-413461673,-126740879,-1353482915,1077988104,1320477388,886195818,18198404,-508558296,-1785185763,112762804,-831610808,1866414978,891333506,18488651,661792760,1628790961,-409780260,-1153795797,876946877,-1601685023,1372485963,791857591,-1608533303,-534984578,-1127755274,-822013501,-1578587449,445679433,-732971622,-790962485,-720709064,54117162,-963561881,-1913048708,-525259953,-140617289,1140177722,-220915201,668550556,-1080614356,367459370,261225585,-1684794075,-85617823,-826893077,-1029151655,314222801,-1228863650,-486184436,282218597,-888953790,-521376242,379116347,1285071038,846784868,-1625320142,-523005217,-744475605,-1989021154,453669953,1268987020,-977374944,-1015663912,-550133875,-1684459730,-435458233,266596637,-447948204,517658769,-832407089,-851542417,370717030,-47440635,-2070949179,-151313767,-182193321,-1506642397,-1817692879,1456262402,-1393524382,1517677493,1846949527,-1999473716,-560569710,-2118563376,1280348187,1908823572,-423180355,846861322,1172426758,-1007518822,-911584259,1655181056,-1155153950,901632758,1897031941,-1308360158,-1228157060,-847864789,1393639104,373351379,950779232,625454576,-1170726756,-146354570,2007998917,544563296,-2050228658,-1964470824,2058025392,1291430526,424198748,50039436,29584100,-689184263,-1865090967,-1503863136,1057563949,-1039604065,-1219600078,-831004069,1469046755,985887462];
  18.      
  19.       private static const ROUNDS:uint = 16;
  20.      
  21.       private static const BLOCK_SIZE:uint = 8;
  22.      
  23.       private static const SBOX_SK:uint = 256;
  24.      
  25.       private static const P_SZ:uint = ROUNDS + 2;
  26.        
  27.      
  28.       private var S0:Array;
  29.      
  30.       private var S1:Array;
  31.      
  32.       private var S2:Array;
  33.      
  34.       private var S3:Array;
  35.      
  36.       private var P:Array;
  37.      
  38.       private var cheese:ByteArray;
  39.      
  40.       public function ButtHoleKey(param1:ByteArray)
  41.       {
  42.          super();
  43.          this.cheese = param1;
  44.          this.setCheese(param1);
  45.       }
  46.      
  47.       public function getBlockSize() : uint
  48.       {
  49.          return BLOCK_SIZE;
  50.       }
  51.      
  52.       public function decrypt(param1:ByteArray, param2:uint = 0) : void
  53.       {
  54.          this.decryptBlock(param1,param2,param1,param2);
  55.       }
  56.      
  57.       public function dispose() : void
  58.       {
  59.          var _loc1_:uint = 0;
  60.          _loc1_ = 0;
  61.          while(_loc1_ < this.S0.length)
  62.          {
  63.             this.S0[_loc1_] = 0;
  64.             _loc1_++;
  65.          }
  66.          _loc1_ = 0;
  67.          while(_loc1_ < this.S1.length)
  68.          {
  69.             this.S1[_loc1_] = 0;
  70.             _loc1_++;
  71.          }
  72.          _loc1_ = 0;
  73.          while(_loc1_ < this.S2.length)
  74.          {
  75.             this.S2[_loc1_] = 0;
  76.             _loc1_++;
  77.          }
  78.          _loc1_ = 0;
  79.          while(_loc1_ < this.S3.length)
  80.          {
  81.             this.S3[_loc1_] = 0;
  82.             _loc1_++;
  83.          }
  84.          _loc1_ = 0;
  85.          while(_loc1_ < this.P.length)
  86.          {
  87.             this.P[_loc1_] = 0;
  88.             _loc1_++;
  89.          }
  90.          this.S0 = null;
  91.          this.S1 = null;
  92.          this.S2 = null;
  93.          this.S3 = null;
  94.          this.P = null;
  95.          _loc1_ = 0;
  96.          while(_loc1_ < this.cheese.length)
  97.          {
  98.             this.cheese[_loc1_] = 0;
  99.             _loc1_++;
  100.          }
  101.          this.cheese.length = 0;
  102.          this.cheese = null;
  103.          Memory.gc();
  104.       }
  105.      
  106.       public function encrypt(param1:ByteArray, param2:uint = 0) : void
  107.       {
  108.          this.encryptBlock(param1,param2,param1,param2);
  109.       }
  110.      
  111.       private function F(param1:uint) : uint
  112.       {
  113.          return (this.S0[param1 >>> 24] + this.S1[param1 >>> 16 & 255] ^ this.S2[param1 >>> 8 & 255]) + this.S3[param1 & 255];
  114.       }
  115.      
  116.       private function processTable(param1:uint, param2:uint, param3:Array) : void
  117.       {
  118.          var _loc6_:uint = 0;
  119.          var _loc4_:uint = param3.length;
  120.          var _loc5_:uint = 0;
  121.          while(_loc5_ < _loc4_)
  122.          {
  123.             param1 = param1 ^ this.P[0];
  124.             _loc6_ = 1;
  125.             while(_loc6_ < ROUNDS)
  126.             {
  127.                param2 = param2 ^ (this.F(param1) ^ this.P[_loc6_]);
  128.                param1 = param1 ^ (this.F(param2) ^ this.P[_loc6_ + 1]);
  129.                _loc6_ = _loc6_ + 2;
  130.             }
  131.             param2 = param2 ^ this.P[ROUNDS + 1];
  132.             param3[_loc5_] = param2;
  133.             param3[_loc5_ + 1] = param1;
  134.             param2 = param1;
  135.             param1 = param3[_loc5_];
  136.             _loc5_ = _loc5_ + 2;
  137.          }
  138.       }
  139.      
  140.       private function setCheese(param1:ByteArray) : void
  141.       {
  142.          var _loc5_:uint = 0;
  143.          var _loc6_:uint = 0;
  144.          this.S0 = KS0.concat();
  145.          this.S1 = KS1.concat();
  146.          this.S2 = KS2.concat();
  147.          this.S3 = KS3.concat();
  148.          this.P = KP.concat();
  149.          var _loc2_:uint = param1.length;
  150.          var _loc3_:uint = 0;
  151.          var _loc4_:uint = 0;
  152.          while(_loc4_ < P_SZ)
  153.          {
  154.             _loc5_ = 0;
  155.             _loc6_ = 0;
  156.             while(_loc6_ < 4)
  157.             {
  158.                _loc5_ = _loc5_ << 8 | param1[_loc3_++] & 255;
  159.                if(_loc3_ >= _loc2_)
  160.                {
  161.                   _loc3_ = 0;
  162.                }
  163.                _loc6_++;
  164.             }
  165.             this.P[_loc4_] = this.P[_loc4_] ^ _loc5_;
  166.             _loc4_++;
  167.          }
  168.          this.processTable(0,0,this.P);
  169.          this.processTable(this.P[P_SZ - 2],this.P[P_SZ - 1],this.S0);
  170.          this.processTable(this.S0[SBOX_SK - 2],this.S0[SBOX_SK - 1],this.S1);
  171.          this.processTable(this.S1[SBOX_SK - 2],this.S1[SBOX_SK - 1],this.S2);
  172.          this.processTable(this.S2[SBOX_SK - 2],this.S2[SBOX_SK - 1],this.S3);
  173.       }
  174.      
  175.       private function encryptBlock(param1:ByteArray, param2:uint, param3:ByteArray, param4:uint) : void
  176.       {
  177.          var _loc5_:uint = this.BytesTo32bits(param1,param2);
  178.          var _loc6_:uint = this.BytesTo32bits(param1,param2 + 4);
  179.          _loc5_ = _loc5_ ^ this.P[0];
  180.          var _loc7_:uint = 1;
  181.          while(_loc7_ < ROUNDS)
  182.          {
  183.             _loc6_ = _loc6_ ^ (this.F(_loc5_) ^ this.P[_loc7_]);
  184.             _loc5_ = _loc5_ ^ (this.F(_loc6_) ^ this.P[_loc7_ + 1]);
  185.             _loc7_ = _loc7_ + 2;
  186.          }
  187.          _loc6_ = _loc6_ ^ this.P[ROUNDS + 1];
  188.          this.Bits32ToBytes(_loc6_,param3,param4);
  189.          this.Bits32ToBytes(_loc5_,param3,param4 + 4);
  190.       }
  191.      
  192.       private function decryptBlock(param1:ByteArray, param2:uint, param3:ByteArray, param4:uint) : void
  193.       {
  194.          var _loc5_:uint = this.BytesTo32bits(param1,param2);
  195.          var _loc6_:uint = this.BytesTo32bits(param1,param2 + 4);
  196.          _loc5_ = _loc5_ ^ this.P[ROUNDS + 1];
  197.          var _loc7_:uint = ROUNDS;
  198.          while(_loc7_ > 0)
  199.          {
  200.             _loc6_ = _loc6_ ^ (this.F(_loc5_) ^ this.P[_loc7_]);
  201.             _loc5_ = _loc5_ ^ (this.F(_loc6_) ^ this.P[_loc7_ - 1]);
  202.             _loc7_ = _loc7_ - 2;
  203.          }
  204.          _loc6_ = _loc6_ ^ this.P[0];
  205.          this.Bits32ToBytes(_loc6_,param3,param4);
  206.          this.Bits32ToBytes(_loc5_,param3,param4 + 4);
  207.       }
  208.      
  209.       private function BytesTo32bits(param1:ByteArray, param2:uint) : uint
  210.       {
  211.          return (param1[param2] & 255) << 24 | (param1[param2 + 1] & 255) << 16 | (param1[param2 + 2] & 255) << 8 | param1[param2 + 3] & 255;
  212.       }
  213.      
  214.       private function Bits32ToBytes(param1:uint, param2:ByteArray, param3:uint) : void
  215.       {
  216.          param2[param3 + 3] = param1;
  217.          param2[param3 + 2] = param1 >> 8;
  218.          param2[param3 + 1] = param1 >> 16;
  219.          param2[param3] = param1 >> 24;
  220.       }
  221.      
  222.       public function toString() : String
  223.       {
  224.          return "butthole";
  225.       }
  226.    }
  227. }
  228.