linux/crypto/cast5_generic.c
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   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/* Kernel cryptographic api.
   3* cast5.c - Cast5 cipher algorithm (rfc2144).
   4*
   5* Derived from GnuPG implementation of cast5.
   6*
   7* Major Changes.
   8*       Complete conformance to rfc2144.
   9*       Supports key size from 40 to 128 bits.
  10*
  11* Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
  12* Copyright (C) 2003 Kartikey Mahendra Bhatt <kartik_me@hotmail.com>.
  13*/
  14
  15
  16#include <asm/unaligned.h>
  17#include <linux/init.h>
  18#include <linux/crypto.h>
  19#include <linux/module.h>
  20#include <linux/errno.h>
  21#include <linux/string.h>
  22#include <linux/types.h>
  23#include <crypto/cast5.h>
  24
  25static const u32 s5[256] = {
  26        0x7ec90c04, 0x2c6e74b9, 0x9b0e66df, 0xa6337911, 0xb86a7fff,
  27        0x1dd358f5, 0x44dd9d44, 0x1731167f,
  28        0x08fbf1fa, 0xe7f511cc, 0xd2051b00, 0x735aba00, 0x2ab722d8,
  29        0x386381cb, 0xacf6243a, 0x69befd7a,
  30        0xe6a2e77f, 0xf0c720cd, 0xc4494816, 0xccf5c180, 0x38851640,
  31        0x15b0a848, 0xe68b18cb, 0x4caadeff,
  32        0x5f480a01, 0x0412b2aa, 0x259814fc, 0x41d0efe2, 0x4e40b48d,
  33        0x248eb6fb, 0x8dba1cfe, 0x41a99b02,
  34        0x1a550a04, 0xba8f65cb, 0x7251f4e7, 0x95a51725, 0xc106ecd7,
  35        0x97a5980a, 0xc539b9aa, 0x4d79fe6a,
  36        0xf2f3f763, 0x68af8040, 0xed0c9e56, 0x11b4958b, 0xe1eb5a88,
  37        0x8709e6b0, 0xd7e07156, 0x4e29fea7,
  38        0x6366e52d, 0x02d1c000, 0xc4ac8e05, 0x9377f571, 0x0c05372a,
  39        0x578535f2, 0x2261be02, 0xd642a0c9,
  40        0xdf13a280, 0x74b55bd2, 0x682199c0, 0xd421e5ec, 0x53fb3ce8,
  41        0xc8adedb3, 0x28a87fc9, 0x3d959981,
  42        0x5c1ff900, 0xfe38d399, 0x0c4eff0b, 0x062407ea, 0xaa2f4fb1,
  43        0x4fb96976, 0x90c79505, 0xb0a8a774,
  44        0xef55a1ff, 0xe59ca2c2, 0xa6b62d27, 0xe66a4263, 0xdf65001f,
  45        0x0ec50966, 0xdfdd55bc, 0x29de0655,
  46        0x911e739a, 0x17af8975, 0x32c7911c, 0x89f89468, 0x0d01e980,
  47        0x524755f4, 0x03b63cc9, 0x0cc844b2,
  48        0xbcf3f0aa, 0x87ac36e9, 0xe53a7426, 0x01b3d82b, 0x1a9e7449,
  49        0x64ee2d7e, 0xcddbb1da, 0x01c94910,
  50        0xb868bf80, 0x0d26f3fd, 0x9342ede7, 0x04a5c284, 0x636737b6,
  51        0x50f5b616, 0xf24766e3, 0x8eca36c1,
  52        0x136e05db, 0xfef18391, 0xfb887a37, 0xd6e7f7d4, 0xc7fb7dc9,
  53        0x3063fcdf, 0xb6f589de, 0xec2941da,
  54        0x26e46695, 0xb7566419, 0xf654efc5, 0xd08d58b7, 0x48925401,
  55        0xc1bacb7f, 0xe5ff550f, 0xb6083049,
  56        0x5bb5d0e8, 0x87d72e5a, 0xab6a6ee1, 0x223a66ce, 0xc62bf3cd,
  57        0x9e0885f9, 0x68cb3e47, 0x086c010f,
  58        0xa21de820, 0xd18b69de, 0xf3f65777, 0xfa02c3f6, 0x407edac3,
  59        0xcbb3d550, 0x1793084d, 0xb0d70eba,
  60        0x0ab378d5, 0xd951fb0c, 0xded7da56, 0x4124bbe4, 0x94ca0b56,
  61        0x0f5755d1, 0xe0e1e56e, 0x6184b5be,
  62        0x580a249f, 0x94f74bc0, 0xe327888e, 0x9f7b5561, 0xc3dc0280,
  63        0x05687715, 0x646c6bd7, 0x44904db3,
  64        0x66b4f0a3, 0xc0f1648a, 0x697ed5af, 0x49e92ff6, 0x309e374f,
  65        0x2cb6356a, 0x85808573, 0x4991f840,
  66        0x76f0ae02, 0x083be84d, 0x28421c9a, 0x44489406, 0x736e4cb8,
  67        0xc1092910, 0x8bc95fc6, 0x7d869cf4,
  68        0x134f616f, 0x2e77118d, 0xb31b2be1, 0xaa90b472, 0x3ca5d717,
  69        0x7d161bba, 0x9cad9010, 0xaf462ba2,
  70        0x9fe459d2, 0x45d34559, 0xd9f2da13, 0xdbc65487, 0xf3e4f94e,
  71        0x176d486f, 0x097c13ea, 0x631da5c7,
  72        0x445f7382, 0x175683f4, 0xcdc66a97, 0x70be0288, 0xb3cdcf72,
  73        0x6e5dd2f3, 0x20936079, 0x459b80a5,
  74        0xbe60e2db, 0xa9c23101, 0xeba5315c, 0x224e42f2, 0x1c5c1572,
  75        0xf6721b2c, 0x1ad2fff3, 0x8c25404e,
  76        0x324ed72f, 0x4067b7fd, 0x0523138e, 0x5ca3bc78, 0xdc0fd66e,
  77        0x75922283, 0x784d6b17, 0x58ebb16e,
  78        0x44094f85, 0x3f481d87, 0xfcfeae7b, 0x77b5ff76, 0x8c2302bf,
  79        0xaaf47556, 0x5f46b02a, 0x2b092801,
  80        0x3d38f5f7, 0x0ca81f36, 0x52af4a8a, 0x66d5e7c0, 0xdf3b0874,
  81        0x95055110, 0x1b5ad7a8, 0xf61ed5ad,
  82        0x6cf6e479, 0x20758184, 0xd0cefa65, 0x88f7be58, 0x4a046826,
  83        0x0ff6f8f3, 0xa09c7f70, 0x5346aba0,
  84        0x5ce96c28, 0xe176eda3, 0x6bac307f, 0x376829d2, 0x85360fa9,
  85        0x17e3fe2a, 0x24b79767, 0xf5a96b20,
  86        0xd6cd2595, 0x68ff1ebf, 0x7555442c, 0xf19f06be, 0xf9e0659a,
  87        0xeeb9491d, 0x34010718, 0xbb30cab8,
  88        0xe822fe15, 0x88570983, 0x750e6249, 0xda627e55, 0x5e76ffa8,
  89        0xb1534546, 0x6d47de08, 0xefe9e7d4
  90};
  91static const u32 s6[256] = {
  92        0xf6fa8f9d, 0x2cac6ce1, 0x4ca34867, 0xe2337f7c, 0x95db08e7,
  93        0x016843b4, 0xeced5cbc, 0x325553ac,
  94        0xbf9f0960, 0xdfa1e2ed, 0x83f0579d, 0x63ed86b9, 0x1ab6a6b8,
  95        0xde5ebe39, 0xf38ff732, 0x8989b138,
  96        0x33f14961, 0xc01937bd, 0xf506c6da, 0xe4625e7e, 0xa308ea99,
  97        0x4e23e33c, 0x79cbd7cc, 0x48a14367,
  98        0xa3149619, 0xfec94bd5, 0xa114174a, 0xeaa01866, 0xa084db2d,
  99        0x09a8486f, 0xa888614a, 0x2900af98,
 100        0x01665991, 0xe1992863, 0xc8f30c60, 0x2e78ef3c, 0xd0d51932,
 101        0xcf0fec14, 0xf7ca07d2, 0xd0a82072,
 102        0xfd41197e, 0x9305a6b0, 0xe86be3da, 0x74bed3cd, 0x372da53c,
 103        0x4c7f4448, 0xdab5d440, 0x6dba0ec3,
 104        0x083919a7, 0x9fbaeed9, 0x49dbcfb0, 0x4e670c53, 0x5c3d9c01,
 105        0x64bdb941, 0x2c0e636a, 0xba7dd9cd,
 106        0xea6f7388, 0xe70bc762, 0x35f29adb, 0x5c4cdd8d, 0xf0d48d8c,
 107        0xb88153e2, 0x08a19866, 0x1ae2eac8,
 108        0x284caf89, 0xaa928223, 0x9334be53, 0x3b3a21bf, 0x16434be3,
 109        0x9aea3906, 0xefe8c36e, 0xf890cdd9,
 110        0x80226dae, 0xc340a4a3, 0xdf7e9c09, 0xa694a807, 0x5b7c5ecc,
 111        0x221db3a6, 0x9a69a02f, 0x68818a54,
 112        0xceb2296f, 0x53c0843a, 0xfe893655, 0x25bfe68a, 0xb4628abc,
 113        0xcf222ebf, 0x25ac6f48, 0xa9a99387,
 114        0x53bddb65, 0xe76ffbe7, 0xe967fd78, 0x0ba93563, 0x8e342bc1,
 115        0xe8a11be9, 0x4980740d, 0xc8087dfc,
 116        0x8de4bf99, 0xa11101a0, 0x7fd37975, 0xda5a26c0, 0xe81f994f,
 117        0x9528cd89, 0xfd339fed, 0xb87834bf,
 118        0x5f04456d, 0x22258698, 0xc9c4c83b, 0x2dc156be, 0x4f628daa,
 119        0x57f55ec5, 0xe2220abe, 0xd2916ebf,
 120        0x4ec75b95, 0x24f2c3c0, 0x42d15d99, 0xcd0d7fa0, 0x7b6e27ff,
 121        0xa8dc8af0, 0x7345c106, 0xf41e232f,
 122        0x35162386, 0xe6ea8926, 0x3333b094, 0x157ec6f2, 0x372b74af,
 123        0x692573e4, 0xe9a9d848, 0xf3160289,
 124        0x3a62ef1d, 0xa787e238, 0xf3a5f676, 0x74364853, 0x20951063,
 125        0x4576698d, 0xb6fad407, 0x592af950,
 126        0x36f73523, 0x4cfb6e87, 0x7da4cec0, 0x6c152daa, 0xcb0396a8,
 127        0xc50dfe5d, 0xfcd707ab, 0x0921c42f,
 128        0x89dff0bb, 0x5fe2be78, 0x448f4f33, 0x754613c9, 0x2b05d08d,
 129        0x48b9d585, 0xdc049441, 0xc8098f9b,
 130        0x7dede786, 0xc39a3373, 0x42410005, 0x6a091751, 0x0ef3c8a6,
 131        0x890072d6, 0x28207682, 0xa9a9f7be,
 132        0xbf32679d, 0xd45b5b75, 0xb353fd00, 0xcbb0e358, 0x830f220a,
 133        0x1f8fb214, 0xd372cf08, 0xcc3c4a13,
 134        0x8cf63166, 0x061c87be, 0x88c98f88, 0x6062e397, 0x47cf8e7a,
 135        0xb6c85283, 0x3cc2acfb, 0x3fc06976,
 136        0x4e8f0252, 0x64d8314d, 0xda3870e3, 0x1e665459, 0xc10908f0,
 137        0x513021a5, 0x6c5b68b7, 0x822f8aa0,
 138        0x3007cd3e, 0x74719eef, 0xdc872681, 0x073340d4, 0x7e432fd9,
 139        0x0c5ec241, 0x8809286c, 0xf592d891,
 140        0x08a930f6, 0x957ef305, 0xb7fbffbd, 0xc266e96f, 0x6fe4ac98,
 141        0xb173ecc0, 0xbc60b42a, 0x953498da,
 142        0xfba1ae12, 0x2d4bd736, 0x0f25faab, 0xa4f3fceb, 0xe2969123,
 143        0x257f0c3d, 0x9348af49, 0x361400bc,
 144        0xe8816f4a, 0x3814f200, 0xa3f94043, 0x9c7a54c2, 0xbc704f57,
 145        0xda41e7f9, 0xc25ad33a, 0x54f4a084,
 146        0xb17f5505, 0x59357cbe, 0xedbd15c8, 0x7f97c5ab, 0xba5ac7b5,
 147        0xb6f6deaf, 0x3a479c3a, 0x5302da25,
 148        0x653d7e6a, 0x54268d49, 0x51a477ea, 0x5017d55b, 0xd7d25d88,
 149        0x44136c76, 0x0404a8c8, 0xb8e5a121,
 150        0xb81a928a, 0x60ed5869, 0x97c55b96, 0xeaec991b, 0x29935913,
 151        0x01fdb7f1, 0x088e8dfa, 0x9ab6f6f5,
 152        0x3b4cbf9f, 0x4a5de3ab, 0xe6051d35, 0xa0e1d855, 0xd36b4cf1,
 153        0xf544edeb, 0xb0e93524, 0xbebb8fbd,
 154        0xa2d762cf, 0x49c92f54, 0x38b5f331, 0x7128a454, 0x48392905,
 155        0xa65b1db8, 0x851c97bd, 0xd675cf2f
 156};
 157static const u32 s7[256] = {
 158        0x85e04019, 0x332bf567, 0x662dbfff, 0xcfc65693, 0x2a8d7f6f,
 159        0xab9bc912, 0xde6008a1, 0x2028da1f,
 160        0x0227bce7, 0x4d642916, 0x18fac300, 0x50f18b82, 0x2cb2cb11,
 161        0xb232e75c, 0x4b3695f2, 0xb28707de,
 162        0xa05fbcf6, 0xcd4181e9, 0xe150210c, 0xe24ef1bd, 0xb168c381,
 163        0xfde4e789, 0x5c79b0d8, 0x1e8bfd43,
 164        0x4d495001, 0x38be4341, 0x913cee1d, 0x92a79c3f, 0x089766be,
 165        0xbaeeadf4, 0x1286becf, 0xb6eacb19,
 166        0x2660c200, 0x7565bde4, 0x64241f7a, 0x8248dca9, 0xc3b3ad66,
 167        0x28136086, 0x0bd8dfa8, 0x356d1cf2,
 168        0x107789be, 0xb3b2e9ce, 0x0502aa8f, 0x0bc0351e, 0x166bf52a,
 169        0xeb12ff82, 0xe3486911, 0xd34d7516,
 170        0x4e7b3aff, 0x5f43671b, 0x9cf6e037, 0x4981ac83, 0x334266ce,
 171        0x8c9341b7, 0xd0d854c0, 0xcb3a6c88,
 172        0x47bc2829, 0x4725ba37, 0xa66ad22b, 0x7ad61f1e, 0x0c5cbafa,
 173        0x4437f107, 0xb6e79962, 0x42d2d816,
 174        0x0a961288, 0xe1a5c06e, 0x13749e67, 0x72fc081a, 0xb1d139f7,
 175        0xf9583745, 0xcf19df58, 0xbec3f756,
 176        0xc06eba30, 0x07211b24, 0x45c28829, 0xc95e317f, 0xbc8ec511,
 177        0x38bc46e9, 0xc6e6fa14, 0xbae8584a,
 178        0xad4ebc46, 0x468f508b, 0x7829435f, 0xf124183b, 0x821dba9f,
 179        0xaff60ff4, 0xea2c4e6d, 0x16e39264,
 180        0x92544a8b, 0x009b4fc3, 0xaba68ced, 0x9ac96f78, 0x06a5b79a,
 181        0xb2856e6e, 0x1aec3ca9, 0xbe838688,
 182        0x0e0804e9, 0x55f1be56, 0xe7e5363b, 0xb3a1f25d, 0xf7debb85,
 183        0x61fe033c, 0x16746233, 0x3c034c28,
 184        0xda6d0c74, 0x79aac56c, 0x3ce4e1ad, 0x51f0c802, 0x98f8f35a,
 185        0x1626a49f, 0xeed82b29, 0x1d382fe3,
 186        0x0c4fb99a, 0xbb325778, 0x3ec6d97b, 0x6e77a6a9, 0xcb658b5c,
 187        0xd45230c7, 0x2bd1408b, 0x60c03eb7,
 188        0xb9068d78, 0xa33754f4, 0xf430c87d, 0xc8a71302, 0xb96d8c32,
 189        0xebd4e7be, 0xbe8b9d2d, 0x7979fb06,
 190        0xe7225308, 0x8b75cf77, 0x11ef8da4, 0xe083c858, 0x8d6b786f,
 191        0x5a6317a6, 0xfa5cf7a0, 0x5dda0033,
 192        0xf28ebfb0, 0xf5b9c310, 0xa0eac280, 0x08b9767a, 0xa3d9d2b0,
 193        0x79d34217, 0x021a718d, 0x9ac6336a,
 194        0x2711fd60, 0x438050e3, 0x069908a8, 0x3d7fedc4, 0x826d2bef,
 195        0x4eeb8476, 0x488dcf25, 0x36c9d566,
 196        0x28e74e41, 0xc2610aca, 0x3d49a9cf, 0xbae3b9df, 0xb65f8de6,
 197        0x92aeaf64, 0x3ac7d5e6, 0x9ea80509,
 198        0xf22b017d, 0xa4173f70, 0xdd1e16c3, 0x15e0d7f9, 0x50b1b887,
 199        0x2b9f4fd5, 0x625aba82, 0x6a017962,
 200        0x2ec01b9c, 0x15488aa9, 0xd716e740, 0x40055a2c, 0x93d29a22,
 201        0xe32dbf9a, 0x058745b9, 0x3453dc1e,
 202        0xd699296e, 0x496cff6f, 0x1c9f4986, 0xdfe2ed07, 0xb87242d1,
 203        0x19de7eae, 0x053e561a, 0x15ad6f8c,
 204        0x66626c1c, 0x7154c24c, 0xea082b2a, 0x93eb2939, 0x17dcb0f0,
 205        0x58d4f2ae, 0x9ea294fb, 0x52cf564c,
 206        0x9883fe66, 0x2ec40581, 0x763953c3, 0x01d6692e, 0xd3a0c108,
 207        0xa1e7160e, 0xe4f2dfa6, 0x693ed285,
 208        0x74904698, 0x4c2b0edd, 0x4f757656, 0x5d393378, 0xa132234f,
 209        0x3d321c5d, 0xc3f5e194, 0x4b269301,
 210        0xc79f022f, 0x3c997e7e, 0x5e4f9504, 0x3ffafbbd, 0x76f7ad0e,
 211        0x296693f4, 0x3d1fce6f, 0xc61e45be,
 212        0xd3b5ab34, 0xf72bf9b7, 0x1b0434c0, 0x4e72b567, 0x5592a33d,
 213        0xb5229301, 0xcfd2a87f, 0x60aeb767,
 214        0x1814386b, 0x30bcc33d, 0x38a0c07d, 0xfd1606f2, 0xc363519b,
 215        0x589dd390, 0x5479f8e6, 0x1cb8d647,
 216        0x97fd61a9, 0xea7759f4, 0x2d57539d, 0x569a58cf, 0xe84e63ad,
 217        0x462e1b78, 0x6580f87e, 0xf3817914,
 218        0x91da55f4, 0x40a230f3, 0xd1988f35, 0xb6e318d2, 0x3ffa50bc,
 219        0x3d40f021, 0xc3c0bdae, 0x4958c24c,
 220        0x518f36b2, 0x84b1d370, 0x0fedce83, 0x878ddada, 0xf2a279c7,
 221        0x94e01be8, 0x90716f4b, 0x954b8aa3
 222};
 223static const u32 sb8[256] = {
 224        0xe216300d, 0xbbddfffc, 0xa7ebdabd, 0x35648095, 0x7789f8b7,
 225        0xe6c1121b, 0x0e241600, 0x052ce8b5,
 226        0x11a9cfb0, 0xe5952f11, 0xece7990a, 0x9386d174, 0x2a42931c,
 227        0x76e38111, 0xb12def3a, 0x37ddddfc,
 228        0xde9adeb1, 0x0a0cc32c, 0xbe197029, 0x84a00940, 0xbb243a0f,
 229        0xb4d137cf, 0xb44e79f0, 0x049eedfd,
 230        0x0b15a15d, 0x480d3168, 0x8bbbde5a, 0x669ded42, 0xc7ece831,
 231        0x3f8f95e7, 0x72df191b, 0x7580330d,
 232        0x94074251, 0x5c7dcdfa, 0xabbe6d63, 0xaa402164, 0xb301d40a,
 233        0x02e7d1ca, 0x53571dae, 0x7a3182a2,
 234        0x12a8ddec, 0xfdaa335d, 0x176f43e8, 0x71fb46d4, 0x38129022,
 235        0xce949ad4, 0xb84769ad, 0x965bd862,
 236        0x82f3d055, 0x66fb9767, 0x15b80b4e, 0x1d5b47a0, 0x4cfde06f,
 237        0xc28ec4b8, 0x57e8726e, 0x647a78fc,
 238        0x99865d44, 0x608bd593, 0x6c200e03, 0x39dc5ff6, 0x5d0b00a3,
 239        0xae63aff2, 0x7e8bd632, 0x70108c0c,
 240        0xbbd35049, 0x2998df04, 0x980cf42a, 0x9b6df491, 0x9e7edd53,
 241        0x06918548, 0x58cb7e07, 0x3b74ef2e,
 242        0x522fffb1, 0xd24708cc, 0x1c7e27cd, 0xa4eb215b, 0x3cf1d2e2,
 243        0x19b47a38, 0x424f7618, 0x35856039,
 244        0x9d17dee7, 0x27eb35e6, 0xc9aff67b, 0x36baf5b8, 0x09c467cd,
 245        0xc18910b1, 0xe11dbf7b, 0x06cd1af8,
 246        0x7170c608, 0x2d5e3354, 0xd4de495a, 0x64c6d006, 0xbcc0c62c,
 247        0x3dd00db3, 0x708f8f34, 0x77d51b42,
 248        0x264f620f, 0x24b8d2bf, 0x15c1b79e, 0x46a52564, 0xf8d7e54e,
 249        0x3e378160, 0x7895cda5, 0x859c15a5,
 250        0xe6459788, 0xc37bc75f, 0xdb07ba0c, 0x0676a3ab, 0x7f229b1e,
 251        0x31842e7b, 0x24259fd7, 0xf8bef472,
 252        0x835ffcb8, 0x6df4c1f2, 0x96f5b195, 0xfd0af0fc, 0xb0fe134c,
 253        0xe2506d3d, 0x4f9b12ea, 0xf215f225,
 254        0xa223736f, 0x9fb4c428, 0x25d04979, 0x34c713f8, 0xc4618187,
 255        0xea7a6e98, 0x7cd16efc, 0x1436876c,
 256        0xf1544107, 0xbedeee14, 0x56e9af27, 0xa04aa441, 0x3cf7c899,
 257        0x92ecbae6, 0xdd67016d, 0x151682eb,
 258        0xa842eedf, 0xfdba60b4, 0xf1907b75, 0x20e3030f, 0x24d8c29e,
 259        0xe139673b, 0xefa63fb8, 0x71873054,
 260        0xb6f2cf3b, 0x9f326442, 0xcb15a4cc, 0xb01a4504, 0xf1e47d8d,
 261        0x844a1be5, 0xbae7dfdc, 0x42cbda70,
 262        0xcd7dae0a, 0x57e85b7a, 0xd53f5af6, 0x20cf4d8c, 0xcea4d428,
 263        0x79d130a4, 0x3486ebfb, 0x33d3cddc,
 264        0x77853b53, 0x37effcb5, 0xc5068778, 0xe580b3e6, 0x4e68b8f4,
 265        0xc5c8b37e, 0x0d809ea2, 0x398feb7c,
 266        0x132a4f94, 0x43b7950e, 0x2fee7d1c, 0x223613bd, 0xdd06caa2,
 267        0x37df932b, 0xc4248289, 0xacf3ebc3,
 268        0x5715f6b7, 0xef3478dd, 0xf267616f, 0xc148cbe4, 0x9052815e,
 269        0x5e410fab, 0xb48a2465, 0x2eda7fa4,
 270        0xe87b40e4, 0xe98ea084, 0x5889e9e1, 0xefd390fc, 0xdd07d35b,
 271        0xdb485694, 0x38d7e5b2, 0x57720101,
 272        0x730edebc, 0x5b643113, 0x94917e4f, 0x503c2fba, 0x646f1282,
 273        0x7523d24a, 0xe0779695, 0xf9c17a8f,
 274        0x7a5b2121, 0xd187b896, 0x29263a4d, 0xba510cdf, 0x81f47c9f,
 275        0xad1163ed, 0xea7b5965, 0x1a00726e,
 276        0x11403092, 0x00da6d77, 0x4a0cdd61, 0xad1f4603, 0x605bdfb0,
 277        0x9eedc364, 0x22ebe6a8, 0xcee7d28a,
 278        0xa0e736a0, 0x5564a6b9, 0x10853209, 0xc7eb8f37, 0x2de705ca,
 279        0x8951570f, 0xdf09822b, 0xbd691a6c,
 280        0xaa12e4f2, 0x87451c0f, 0xe0f6a27a, 0x3ada4819, 0x4cf1764f,
 281        0x0d771c2b, 0x67cdb156, 0x350d8384,
 282        0x5938fa0f, 0x42399ef3, 0x36997b07, 0x0e84093d, 0x4aa93e61,
 283        0x8360d87b, 0x1fa98b0c, 0x1149382c,
 284        0xe97625a5, 0x0614d1b7, 0x0e25244b, 0x0c768347, 0x589e8d82,
 285        0x0d2059d1, 0xa466bb1e, 0xf8da0a82,
 286        0x04f19130, 0xba6e4ec0, 0x99265164, 0x1ee7230d, 0x50b2ad80,
 287        0xeaee6801, 0x8db2a283, 0xea8bf59e
 288};
 289
 290#define s1 cast_s1
 291#define s2 cast_s2
 292#define s3 cast_s3
 293#define s4 cast_s4
 294
 295#define F1(D, m, r)  ((I = ((m) + (D))), (I = rol32(I, (r))),   \
 296        (((s1[I >> 24] ^ s2[(I>>16)&0xff]) - s3[(I>>8)&0xff]) + s4[I&0xff]))
 297#define F2(D, m, r)  ((I = ((m) ^ (D))), (I = rol32(I, (r))),   \
 298        (((s1[I >> 24] - s2[(I>>16)&0xff]) + s3[(I>>8)&0xff]) ^ s4[I&0xff]))
 299#define F3(D, m, r)  ((I = ((m) - (D))), (I = rol32(I, (r))),   \
 300        (((s1[I >> 24] + s2[(I>>16)&0xff]) ^ s3[(I>>8)&0xff]) - s4[I&0xff]))
 301
 302
 303void __cast5_encrypt(struct cast5_ctx *c, u8 *outbuf, const u8 *inbuf)
 304{
 305        u32 l, r, t;
 306        u32 I;                  /* used by the Fx macros */
 307        u32 *Km;
 308        u8 *Kr;
 309
 310        Km = c->Km;
 311        Kr = c->Kr;
 312
 313        /* (L0,R0) <-- (m1...m64).  (Split the plaintext into left and
 314         * right 32-bit halves L0 = m1...m32 and R0 = m33...m64.)
 315         */
 316        l = get_unaligned_be32(inbuf);
 317        r = get_unaligned_be32(inbuf + 4);
 318
 319        /* (16 rounds) for i from 1 to 16, compute Li and Ri as follows:
 320         *  Li = Ri-1;
 321         *  Ri = Li-1 ^ f(Ri-1,Kmi,Kri), where f is defined in Section 2.2
 322         * Rounds 1, 4, 7, 10, 13, and 16 use f function Type 1.
 323         * Rounds 2, 5, 8, 11, and 14 use f function Type 2.
 324         * Rounds 3, 6, 9, 12, and 15 use f function Type 3.
 325         */
 326
 327        t = l; l = r; r = t ^ F1(r, Km[0], Kr[0]);
 328        t = l; l = r; r = t ^ F2(r, Km[1], Kr[1]);
 329        t = l; l = r; r = t ^ F3(r, Km[2], Kr[2]);
 330        t = l; l = r; r = t ^ F1(r, Km[3], Kr[3]);
 331        t = l; l = r; r = t ^ F2(r, Km[4], Kr[4]);
 332        t = l; l = r; r = t ^ F3(r, Km[5], Kr[5]);
 333        t = l; l = r; r = t ^ F1(r, Km[6], Kr[6]);
 334        t = l; l = r; r = t ^ F2(r, Km[7], Kr[7]);
 335        t = l; l = r; r = t ^ F3(r, Km[8], Kr[8]);
 336        t = l; l = r; r = t ^ F1(r, Km[9], Kr[9]);
 337        t = l; l = r; r = t ^ F2(r, Km[10], Kr[10]);
 338        t = l; l = r; r = t ^ F3(r, Km[11], Kr[11]);
 339        if (!(c->rr)) {
 340                t = l; l = r; r = t ^ F1(r, Km[12], Kr[12]);
 341                t = l; l = r; r = t ^ F2(r, Km[13], Kr[13]);
 342                t = l; l = r; r = t ^ F3(r, Km[14], Kr[14]);
 343                t = l; l = r; r = t ^ F1(r, Km[15], Kr[15]);
 344        }
 345
 346        /* c1...c64 <-- (R16,L16).  (Exchange final blocks L16, R16 and
 347         *  concatenate to form the ciphertext.) */
 348        put_unaligned_be32(r, outbuf);
 349        put_unaligned_be32(l, outbuf + 4);
 350}
 351EXPORT_SYMBOL_GPL(__cast5_encrypt);
 352
 353static void cast5_encrypt(struct crypto_tfm *tfm, u8 *outbuf, const u8 *inbuf)
 354{
 355        __cast5_encrypt(crypto_tfm_ctx(tfm), outbuf, inbuf);
 356}
 357
 358void __cast5_decrypt(struct cast5_ctx *c, u8 *outbuf, const u8 *inbuf)
 359{
 360        u32 l, r, t;
 361        u32 I;
 362        u32 *Km;
 363        u8 *Kr;
 364
 365        Km = c->Km;
 366        Kr = c->Kr;
 367
 368        l = get_unaligned_be32(inbuf);
 369        r = get_unaligned_be32(inbuf + 4);
 370
 371        if (!(c->rr)) {
 372                t = l; l = r; r = t ^ F1(r, Km[15], Kr[15]);
 373                t = l; l = r; r = t ^ F3(r, Km[14], Kr[14]);
 374                t = l; l = r; r = t ^ F2(r, Km[13], Kr[13]);
 375                t = l; l = r; r = t ^ F1(r, Km[12], Kr[12]);
 376        }
 377        t = l; l = r; r = t ^ F3(r, Km[11], Kr[11]);
 378        t = l; l = r; r = t ^ F2(r, Km[10], Kr[10]);
 379        t = l; l = r; r = t ^ F1(r, Km[9], Kr[9]);
 380        t = l; l = r; r = t ^ F3(r, Km[8], Kr[8]);
 381        t = l; l = r; r = t ^ F2(r, Km[7], Kr[7]);
 382        t = l; l = r; r = t ^ F1(r, Km[6], Kr[6]);
 383        t = l; l = r; r = t ^ F3(r, Km[5], Kr[5]);
 384        t = l; l = r; r = t ^ F2(r, Km[4], Kr[4]);
 385        t = l; l = r; r = t ^ F1(r, Km[3], Kr[3]);
 386        t = l; l = r; r = t ^ F3(r, Km[2], Kr[2]);
 387        t = l; l = r; r = t ^ F2(r, Km[1], Kr[1]);
 388        t = l; l = r; r = t ^ F1(r, Km[0], Kr[0]);
 389
 390        put_unaligned_be32(r, outbuf);
 391        put_unaligned_be32(l, outbuf + 4);
 392}
 393EXPORT_SYMBOL_GPL(__cast5_decrypt);
 394
 395static void cast5_decrypt(struct crypto_tfm *tfm, u8 *outbuf, const u8 *inbuf)
 396{
 397        __cast5_decrypt(crypto_tfm_ctx(tfm), outbuf, inbuf);
 398}
 399
 400static void key_schedule(u32 *x, u32 *z, u32 *k)
 401{
 402
 403#define xi(i)   ((x[(i)/4] >> (8*(3-((i)%4)))) & 0xff)
 404#define zi(i)   ((z[(i)/4] >> (8*(3-((i)%4)))) & 0xff)
 405
 406        z[0] = x[0] ^ s5[xi(13)] ^ s6[xi(15)] ^ s7[xi(12)] ^ sb8[xi(14)] ^
 407            s7[xi(8)];
 408        z[1] = x[2] ^ s5[zi(0)] ^ s6[zi(2)] ^ s7[zi(1)] ^ sb8[zi(3)] ^
 409            sb8[xi(10)];
 410        z[2] = x[3] ^ s5[zi(7)] ^ s6[zi(6)] ^ s7[zi(5)] ^ sb8[zi(4)] ^
 411            s5[xi(9)];
 412        z[3] = x[1] ^ s5[zi(10)] ^ s6[zi(9)] ^ s7[zi(11)] ^ sb8[zi(8)] ^
 413            s6[xi(11)];
 414        k[0] = s5[zi(8)] ^ s6[zi(9)] ^ s7[zi(7)] ^ sb8[zi(6)] ^ s5[zi(2)];
 415        k[1] = s5[zi(10)] ^ s6[zi(11)] ^ s7[zi(5)] ^ sb8[zi(4)] ^
 416            s6[zi(6)];
 417        k[2] = s5[zi(12)] ^ s6[zi(13)] ^ s7[zi(3)] ^ sb8[zi(2)] ^
 418            s7[zi(9)];
 419        k[3] = s5[zi(14)] ^ s6[zi(15)] ^ s7[zi(1)] ^ sb8[zi(0)] ^
 420            sb8[zi(12)];
 421
 422        x[0] = z[2] ^ s5[zi(5)] ^ s6[zi(7)] ^ s7[zi(4)] ^ sb8[zi(6)] ^
 423            s7[zi(0)];
 424        x[1] = z[0] ^ s5[xi(0)] ^ s6[xi(2)] ^ s7[xi(1)] ^ sb8[xi(3)] ^
 425            sb8[zi(2)];
 426        x[2] = z[1] ^ s5[xi(7)] ^ s6[xi(6)] ^ s7[xi(5)] ^ sb8[xi(4)] ^
 427            s5[zi(1)];
 428        x[3] = z[3] ^ s5[xi(10)] ^ s6[xi(9)] ^ s7[xi(11)] ^ sb8[xi(8)] ^
 429            s6[zi(3)];
 430        k[4] = s5[xi(3)] ^ s6[xi(2)] ^ s7[xi(12)] ^ sb8[xi(13)] ^
 431            s5[xi(8)];
 432        k[5] = s5[xi(1)] ^ s6[xi(0)] ^ s7[xi(14)] ^ sb8[xi(15)] ^
 433            s6[xi(13)];
 434        k[6] = s5[xi(7)] ^ s6[xi(6)] ^ s7[xi(8)] ^ sb8[xi(9)] ^ s7[xi(3)];
 435        k[7] = s5[xi(5)] ^ s6[xi(4)] ^ s7[xi(10)] ^ sb8[xi(11)] ^
 436            sb8[xi(7)];
 437
 438        z[0] = x[0] ^ s5[xi(13)] ^ s6[xi(15)] ^ s7[xi(12)] ^ sb8[xi(14)] ^
 439            s7[xi(8)];
 440        z[1] = x[2] ^ s5[zi(0)] ^ s6[zi(2)] ^ s7[zi(1)] ^ sb8[zi(3)] ^
 441            sb8[xi(10)];
 442        z[2] = x[3] ^ s5[zi(7)] ^ s6[zi(6)] ^ s7[zi(5)] ^ sb8[zi(4)] ^
 443            s5[xi(9)];
 444        z[3] = x[1] ^ s5[zi(10)] ^ s6[zi(9)] ^ s7[zi(11)] ^ sb8[zi(8)] ^
 445            s6[xi(11)];
 446        k[8] = s5[zi(3)] ^ s6[zi(2)] ^ s7[zi(12)] ^ sb8[zi(13)] ^
 447            s5[zi(9)];
 448        k[9] = s5[zi(1)] ^ s6[zi(0)] ^ s7[zi(14)] ^ sb8[zi(15)] ^
 449            s6[zi(12)];
 450        k[10] = s5[zi(7)] ^ s6[zi(6)] ^ s7[zi(8)] ^ sb8[zi(9)] ^ s7[zi(2)];
 451        k[11] = s5[zi(5)] ^ s6[zi(4)] ^ s7[zi(10)] ^ sb8[zi(11)] ^
 452            sb8[zi(6)];
 453
 454        x[0] = z[2] ^ s5[zi(5)] ^ s6[zi(7)] ^ s7[zi(4)] ^ sb8[zi(6)] ^
 455            s7[zi(0)];
 456        x[1] = z[0] ^ s5[xi(0)] ^ s6[xi(2)] ^ s7[xi(1)] ^ sb8[xi(3)] ^
 457            sb8[zi(2)];
 458        x[2] = z[1] ^ s5[xi(7)] ^ s6[xi(6)] ^ s7[xi(5)] ^ sb8[xi(4)] ^
 459            s5[zi(1)];
 460        x[3] = z[3] ^ s5[xi(10)] ^ s6[xi(9)] ^ s7[xi(11)] ^ sb8[xi(8)] ^
 461            s6[zi(3)];
 462        k[12] = s5[xi(8)] ^ s6[xi(9)] ^ s7[xi(7)] ^ sb8[xi(6)] ^ s5[xi(3)];
 463        k[13] = s5[xi(10)] ^ s6[xi(11)] ^ s7[xi(5)] ^ sb8[xi(4)] ^
 464            s6[xi(7)];
 465        k[14] = s5[xi(12)] ^ s6[xi(13)] ^ s7[xi(3)] ^ sb8[xi(2)] ^
 466            s7[xi(8)];
 467        k[15] = s5[xi(14)] ^ s6[xi(15)] ^ s7[xi(1)] ^ sb8[xi(0)] ^
 468            sb8[xi(13)];
 469
 470#undef xi
 471#undef zi
 472}
 473
 474
 475int cast5_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int key_len)
 476{
 477        struct cast5_ctx *c = crypto_tfm_ctx(tfm);
 478        int i;
 479        u32 x[4];
 480        u32 z[4];
 481        u32 k[16];
 482        __be32 p_key[4];
 483
 484        c->rr = key_len <= 10 ? 1 : 0;
 485
 486        memset(p_key, 0, 16);
 487        memcpy(p_key, key, key_len);
 488
 489
 490        x[0] = be32_to_cpu(p_key[0]);
 491        x[1] = be32_to_cpu(p_key[1]);
 492        x[2] = be32_to_cpu(p_key[2]);
 493        x[3] = be32_to_cpu(p_key[3]);
 494
 495        key_schedule(x, z, k);
 496        for (i = 0; i < 16; i++)
 497                c->Km[i] = k[i];
 498        key_schedule(x, z, k);
 499        for (i = 0; i < 16; i++)
 500                c->Kr[i] = k[i] & 0x1f;
 501        return 0;
 502}
 503EXPORT_SYMBOL_GPL(cast5_setkey);
 504
 505static struct crypto_alg alg = {
 506        .cra_name               = "cast5",
 507        .cra_driver_name        = "cast5-generic",
 508        .cra_priority           = 100,
 509        .cra_flags              = CRYPTO_ALG_TYPE_CIPHER,
 510        .cra_blocksize          = CAST5_BLOCK_SIZE,
 511        .cra_ctxsize            = sizeof(struct cast5_ctx),
 512        .cra_module             = THIS_MODULE,
 513        .cra_u                  = {
 514                .cipher = {
 515                        .cia_min_keysize = CAST5_MIN_KEY_SIZE,
 516                        .cia_max_keysize = CAST5_MAX_KEY_SIZE,
 517                        .cia_setkey  = cast5_setkey,
 518                        .cia_encrypt = cast5_encrypt,
 519                        .cia_decrypt = cast5_decrypt
 520                }
 521        }
 522};
 523
 524static int __init cast5_mod_init(void)
 525{
 526        return crypto_register_alg(&alg);
 527}
 528
 529static void __exit cast5_mod_fini(void)
 530{
 531        crypto_unregister_alg(&alg);
 532}
 533
 534subsys_initcall(cast5_mod_init);
 535module_exit(cast5_mod_fini);
 536
 537MODULE_LICENSE("GPL");
 538MODULE_DESCRIPTION("Cast5 Cipher Algorithm");
 539MODULE_ALIAS_CRYPTO("cast5");
 540MODULE_ALIAS_CRYPTO("cast5-generic");
 541
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