crypto/cast5_generic.c

   1 /* Kernel cryptographic api.
   2 * cast5.c - Cast5 cipher algorithm (rfc2144).
   3 *
   4 * Derived from GnuPG implementation of cast5.
   5 *
   6 * Major Changes.
   7 *       Complete conformance to rfc2144.
   8 *       Supports key size from 40 to 128 bits.
   9 *
  10 * Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
  11 * Copyright (C) 2003 Kartikey Mahendra Bhatt <kartik_me@hotmail.com>.
  12 *
  13 * This program is free software; you can redistribute it and/or modify it
  14 * under the terms of GNU General Public License as published by the Free
  15 * Software Foundation; either version 2 of the License, or (at your option)
  16 * any later version.
  17 *
  18 * You should have received a copy of the GNU General Public License
  19 * along with this program; if not, write to the Free Software
  20 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  21 */
  22
  23
  24 #include <asm/byteorder.h>
  25 #include <linux/init.h>
  26 #include <linux/crypto.h>
  27 #include <linux/module.h>
  28 #include <linux/errno.h>
  29 #include <linux/string.h>
  30 #include <linux/types.h>
  31 #include <crypto/cast5.h>
  32
  33 static const u32 s5[256] = {
  34         0x7ec90c04, 0x2c6e74b9, 0x9b0e66df, 0xa6337911, 0xb86a7fff,
  35         0x1dd358f5, 0x44dd9d44, 0x1731167f,
  36         0x08fbf1fa, 0xe7f511cc, 0xd2051b00, 0x735aba00, 0x2ab722d8,
  37         0x386381cb, 0xacf6243a, 0x69befd7a,
  38         0xe6a2e77f, 0xf0c720cd, 0xc4494816, 0xccf5c180, 0x38851640,
  39         0x15b0a848, 0xe68b18cb, 0x4caadeff,
  40         0x5f480a01, 0x0412b2aa, 0x259814fc, 0x41d0efe2, 0x4e40b48d,
  41         0x248eb6fb, 0x8dba1cfe, 0x41a99b02,
  42         0x1a550a04, 0xba8f65cb, 0x7251f4e7, 0x95a51725, 0xc106ecd7,
  43         0x97a5980a, 0xc539b9aa, 0x4d79fe6a,
  44         0xf2f3f763, 0x68af8040, 0xed0c9e56, 0x11b4958b, 0xe1eb5a88,
  45         0x8709e6b0, 0xd7e07156, 0x4e29fea7,
  46         0x6366e52d, 0x02d1c000, 0xc4ac8e05, 0x9377f571, 0x0c05372a,
  47         0x578535f2, 0x2261be02, 0xd642a0c9,
  48         0xdf13a280, 0x74b55bd2, 0x682199c0, 0xd421e5ec, 0x53fb3ce8,
  49         0xc8adedb3, 0x28a87fc9, 0x3d959981,
  50         0x5c1ff900, 0xfe38d399, 0x0c4eff0b, 0x062407ea, 0xaa2f4fb1,
  51         0x4fb96976, 0x90c79505, 0xb0a8a774,
  52         0xef55a1ff, 0xe59ca2c2, 0xa6b62d27, 0xe66a4263, 0xdf65001f,
  53         0x0ec50966, 0xdfdd55bc, 0x29de0655,
  54         0x911e739a, 0x17af8975, 0x32c7911c, 0x89f89468, 0x0d01e980,
  55         0x524755f4, 0x03b63cc9, 0x0cc844b2,
  56         0xbcf3f0aa, 0x87ac36e9, 0xe53a7426, 0x01b3d82b, 0x1a9e7449,
  57         0x64ee2d7e, 0xcddbb1da, 0x01c94910,
  58         0xb868bf80, 0x0d26f3fd, 0x9342ede7, 0x04a5c284, 0x636737b6,
  59         0x50f5b616, 0xf24766e3, 0x8eca36c1,
  60         0x136e05db, 0xfef18391, 0xfb887a37, 0xd6e7f7d4, 0xc7fb7dc9,
  61         0x3063fcdf, 0xb6f589de, 0xec2941da,
  62         0x26e46695, 0xb7566419, 0xf654efc5, 0xd08d58b7, 0x48925401,
  63         0xc1bacb7f, 0xe5ff550f, 0xb6083049,
  64         0x5bb5d0e8, 0x87d72e5a, 0xab6a6ee1, 0x223a66ce, 0xc62bf3cd,
  65         0x9e0885f9, 0x68cb3e47, 0x086c010f,
  66         0xa21de820, 0xd18b69de, 0xf3f65777, 0xfa02c3f6, 0x407edac3,
  67         0xcbb3d550, 0x1793084d, 0xb0d70eba,
  68         0x0ab378d5, 0xd951fb0c, 0xded7da56, 0x4124bbe4, 0x94ca0b56,
  69         0x0f5755d1, 0xe0e1e56e, 0x6184b5be,
  70         0x580a249f, 0x94f74bc0, 0xe327888e, 0x9f7b5561, 0xc3dc0280,
  71         0x05687715, 0x646c6bd7, 0x44904db3,
  72         0x66b4f0a3, 0xc0f1648a, 0x697ed5af, 0x49e92ff6, 0x309e374f,
  73         0x2cb6356a, 0x85808573, 0x4991f840,
  74         0x76f0ae02, 0x083be84d, 0x28421c9a, 0x44489406, 0x736e4cb8,
  75         0xc1092910, 0x8bc95fc6, 0x7d869cf4,
  76         0x134f616f, 0x2e77118d, 0xb31b2be1, 0xaa90b472, 0x3ca5d717,
  77         0x7d161bba, 0x9cad9010, 0xaf462ba2,
  78         0x9fe459d2, 0x45d34559, 0xd9f2da13, 0xdbc65487, 0xf3e4f94e,
  79         0x176d486f, 0x097c13ea, 0x631da5c7,
  80         0x445f7382, 0x175683f4, 0xcdc66a97, 0x70be0288, 0xb3cdcf72,
  81         0x6e5dd2f3, 0x20936079, 0x459b80a5,
  82         0xbe60e2db, 0xa9c23101, 0xeba5315c, 0x224e42f2, 0x1c5c1572,
  83         0xf6721b2c, 0x1ad2fff3, 0x8c25404e,
  84         0x324ed72f, 0x4067b7fd, 0x0523138e, 0x5ca3bc78, 0xdc0fd66e,
  85         0x75922283, 0x784d6b17, 0x58ebb16e,
  86         0x44094f85, 0x3f481d87, 0xfcfeae7b, 0x77b5ff76, 0x8c2302bf,
  87         0xaaf47556, 0x5f46b02a, 0x2b092801,
  88         0x3d38f5f7, 0x0ca81f36, 0x52af4a8a, 0x66d5e7c0, 0xdf3b0874,
  89         0x95055110, 0x1b5ad7a8, 0xf61ed5ad,
  90         0x6cf6e479, 0x20758184, 0xd0cefa65, 0x88f7be58, 0x4a046826,
  91         0x0ff6f8f3, 0xa09c7f70, 0x5346aba0,
  92         0x5ce96c28, 0xe176eda3, 0x6bac307f, 0x376829d2, 0x85360fa9,
  93         0x17e3fe2a, 0x24b79767, 0xf5a96b20,
  94         0xd6cd2595, 0x68ff1ebf, 0x7555442c, 0xf19f06be, 0xf9e0659a,
  95         0xeeb9491d, 0x34010718, 0xbb30cab8,
  96         0xe822fe15, 0x88570983, 0x750e6249, 0xda627e55, 0x5e76ffa8,
  97         0xb1534546, 0x6d47de08, 0xefe9e7d4
  98 };
  99 static const u32 s6[256] = {
 100         0xf6fa8f9d, 0x2cac6ce1, 0x4ca34867, 0xe2337f7c, 0x95db08e7,
 101         0x016843b4, 0xeced5cbc, 0x325553ac,
 102         0xbf9f0960, 0xdfa1e2ed, 0x83f0579d, 0x63ed86b9, 0x1ab6a6b8,
 103         0xde5ebe39, 0xf38ff732, 0x8989b138,
 104         0x33f14961, 0xc01937bd, 0xf506c6da, 0xe4625e7e, 0xa308ea99,
 105         0x4e23e33c, 0x79cbd7cc, 0x48a14367,
 106         0xa3149619, 0xfec94bd5, 0xa114174a, 0xeaa01866, 0xa084db2d,
 107         0x09a8486f, 0xa888614a, 0x2900af98,
 108         0x01665991, 0xe1992863, 0xc8f30c60, 0x2e78ef3c, 0xd0d51932,
 109         0xcf0fec14, 0xf7ca07d2, 0xd0a82072,
 110         0xfd41197e, 0x9305a6b0, 0xe86be3da, 0x74bed3cd, 0x372da53c,
 111         0x4c7f4448, 0xdab5d440, 0x6dba0ec3,
 112         0x083919a7, 0x9fbaeed9, 0x49dbcfb0, 0x4e670c53, 0x5c3d9c01,
 113         0x64bdb941, 0x2c0e636a, 0xba7dd9cd,
 114         0xea6f7388, 0xe70bc762, 0x35f29adb, 0x5c4cdd8d, 0xf0d48d8c,
 115         0xb88153e2, 0x08a19866, 0x1ae2eac8,
 116         0x284caf89, 0xaa928223, 0x9334be53, 0x3b3a21bf, 0x16434be3,
 117         0x9aea3906, 0xefe8c36e, 0xf890cdd9,
 118         0x80226dae, 0xc340a4a3, 0xdf7e9c09, 0xa694a807, 0x5b7c5ecc,
 119         0x221db3a6, 0x9a69a02f, 0x68818a54,
 120         0xceb2296f, 0x53c0843a, 0xfe893655, 0x25bfe68a, 0xb4628abc,
 121         0xcf222ebf, 0x25ac6f48, 0xa9a99387,
 122         0x53bddb65, 0xe76ffbe7, 0xe967fd78, 0x0ba93563, 0x8e342bc1,
 123         0xe8a11be9, 0x4980740d, 0xc8087dfc,
 124         0x8de4bf99, 0xa11101a0, 0x7fd37975, 0xda5a26c0, 0xe81f994f,
 125         0x9528cd89, 0xfd339fed, 0xb87834bf,
 126         0x5f04456d, 0x22258698, 0xc9c4c83b, 0x2dc156be, 0x4f628daa,
 127         0x57f55ec5, 0xe2220abe, 0xd2916ebf,
 128         0x4ec75b95, 0x24f2c3c0, 0x42d15d99, 0xcd0d7fa0, 0x7b6e27ff,
 129         0xa8dc8af0, 0x7345c106, 0xf41e232f,
 130         0x35162386, 0xe6ea8926, 0x3333b094, 0x157ec6f2, 0x372b74af,
 131         0x692573e4, 0xe9a9d848, 0xf3160289,
 132         0x3a62ef1d, 0xa787e238, 0xf3a5f676, 0x74364853, 0x20951063,
 133         0x4576698d, 0xb6fad407, 0x592af950,
 134         0x36f73523, 0x4cfb6e87, 0x7da4cec0, 0x6c152daa, 0xcb0396a8,
 135         0xc50dfe5d, 0xfcd707ab, 0x0921c42f,
 136         0x89dff0bb, 0x5fe2be78, 0x448f4f33, 0x754613c9, 0x2b05d08d,
 137         0x48b9d585, 0xdc049441, 0xc8098f9b,
 138         0x7dede786, 0xc39a3373, 0x42410005, 0x6a091751, 0x0ef3c8a6,
 139         0x890072d6, 0x28207682, 0xa9a9f7be,
 140         0xbf32679d, 0xd45b5b75, 0xb353fd00, 0xcbb0e358, 0x830f220a,
 141         0x1f8fb214, 0xd372cf08, 0xcc3c4a13,
 142         0x8cf63166, 0x061c87be, 0x88c98f88, 0x6062e397, 0x47cf8e7a,
 143         0xb6c85283, 0x3cc2acfb, 0x3fc06976,
 144         0x4e8f0252, 0x64d8314d, 0xda3870e3, 0x1e665459, 0xc10908f0,
 145         0x513021a5, 0x6c5b68b7, 0x822f8aa0,
 146         0x3007cd3e, 0x74719eef, 0xdc872681, 0x073340d4, 0x7e432fd9,
 147         0x0c5ec241, 0x8809286c, 0xf592d891,
 148         0x08a930f6, 0x957ef305, 0xb7fbffbd, 0xc266e96f, 0x6fe4ac98,
 149         0xb173ecc0, 0xbc60b42a, 0x953498da,
 150         0xfba1ae12, 0x2d4bd736, 0x0f25faab, 0xa4f3fceb, 0xe2969123,
 151         0x257f0c3d, 0x9348af49, 0x361400bc,
 152         0xe8816f4a, 0x3814f200, 0xa3f94043, 0x9c7a54c2, 0xbc704f57,
 153         0xda41e7f9, 0xc25ad33a, 0x54f4a084,
 154         0xb17f5505, 0x59357cbe, 0xedbd15c8, 0x7f97c5ab, 0xba5ac7b5,
 155         0xb6f6deaf, 0x3a479c3a, 0x5302da25,
 156         0x653d7e6a, 0x54268d49, 0x51a477ea, 0x5017d55b, 0xd7d25d88,
 157         0x44136c76, 0x0404a8c8, 0xb8e5a121,
 158         0xb81a928a, 0x60ed5869, 0x97c55b96, 0xeaec991b, 0x29935913,
 159         0x01fdb7f1, 0x088e8dfa, 0x9ab6f6f5,
 160         0x3b4cbf9f, 0x4a5de3ab, 0xe6051d35, 0xa0e1d855, 0xd36b4cf1,
 161         0xf544edeb, 0xb0e93524, 0xbebb8fbd,
 162         0xa2d762cf, 0x49c92f54, 0x38b5f331, 0x7128a454, 0x48392905,
 163         0xa65b1db8, 0x851c97bd, 0xd675cf2f
 164 };
 165 static const u32 s7[256] = {
 166         0x85e04019, 0x332bf567, 0x662dbfff, 0xcfc65693, 0x2a8d7f6f,
 167         0xab9bc912, 0xde6008a1, 0x2028da1f,
 168         0x0227bce7, 0x4d642916, 0x18fac300, 0x50f18b82, 0x2cb2cb11,
 169         0xb232e75c, 0x4b3695f2, 0xb28707de,
 170         0xa05fbcf6, 0xcd4181e9, 0xe150210c, 0xe24ef1bd, 0xb168c381,
 171         0xfde4e789, 0x5c79b0d8, 0x1e8bfd43,
 172         0x4d495001, 0x38be4341, 0x913cee1d, 0x92a79c3f, 0x089766be,
 173         0xbaeeadf4, 0x1286becf, 0xb6eacb19,
 174         0x2660c200, 0x7565bde4, 0x64241f7a, 0x8248dca9, 0xc3b3ad66,
 175         0x28136086, 0x0bd8dfa8, 0x356d1cf2,
 176         0x107789be, 0xb3b2e9ce, 0x0502aa8f, 0x0bc0351e, 0x166bf52a,
 177         0xeb12ff82, 0xe3486911, 0xd34d7516,
 178         0x4e7b3aff, 0x5f43671b, 0x9cf6e037, 0x4981ac83, 0x334266ce,
 179         0x8c9341b7, 0xd0d854c0, 0xcb3a6c88,
 180         0x47bc2829, 0x4725ba37, 0xa66ad22b, 0x7ad61f1e, 0x0c5cbafa,
 181         0x4437f107, 0xb6e79962, 0x42d2d816,
 182         0x0a961288, 0xe1a5c06e, 0x13749e67, 0x72fc081a, 0xb1d139f7,
 183         0xf9583745, 0xcf19df58, 0xbec3f756,
 184         0xc06eba30, 0x07211b24, 0x45c28829, 0xc95e317f, 0xbc8ec511,
 185         0x38bc46e9, 0xc6e6fa14, 0xbae8584a,
 186         0xad4ebc46, 0x468f508b, 0x7829435f, 0xf124183b, 0x821dba9f,
 187         0xaff60ff4, 0xea2c4e6d, 0x16e39264,
 188         0x92544a8b, 0x009b4fc3, 0xaba68ced, 0x9ac96f78, 0x06a5b79a,
 189         0xb2856e6e, 0x1aec3ca9, 0xbe838688,
 190         0x0e0804e9, 0x55f1be56, 0xe7e5363b, 0xb3a1f25d, 0xf7debb85,
 191         0x61fe033c, 0x16746233, 0x3c034c28,
 192         0xda6d0c74, 0x79aac56c, 0x3ce4e1ad, 0x51f0c802, 0x98f8f35a,
 193         0x1626a49f, 0xeed82b29, 0x1d382fe3,
 194         0x0c4fb99a, 0xbb325778, 0x3ec6d97b, 0x6e77a6a9, 0xcb658b5c,
 195         0xd45230c7, 0x2bd1408b, 0x60c03eb7,
 196         0xb9068d78, 0xa33754f4, 0xf430c87d, 0xc8a71302, 0xb96d8c32,
 197         0xebd4e7be, 0xbe8b9d2d, 0x7979fb06,
 198         0xe7225308, 0x8b75cf77, 0x11ef8da4, 0xe083c858, 0x8d6b786f,
 199         0x5a6317a6, 0xfa5cf7a0, 0x5dda0033,
 200         0xf28ebfb0, 0xf5b9c310, 0xa0eac280, 0x08b9767a, 0xa3d9d2b0,
 201         0x79d34217, 0x021a718d, 0x9ac6336a,
 202         0x2711fd60, 0x438050e3, 0x069908a8, 0x3d7fedc4, 0x826d2bef,
 203         0x4eeb8476, 0x488dcf25, 0x36c9d566,
 204         0x28e74e41, 0xc2610aca, 0x3d49a9cf, 0xbae3b9df, 0xb65f8de6,
 205         0x92aeaf64, 0x3ac7d5e6, 0x9ea80509,
 206         0xf22b017d, 0xa4173f70, 0xdd1e16c3, 0x15e0d7f9, 0x50b1b887,
 207         0x2b9f4fd5, 0x625aba82, 0x6a017962,
 208         0x2ec01b9c, 0x15488aa9, 0xd716e740, 0x40055a2c, 0x93d29a22,
 209         0xe32dbf9a, 0x058745b9, 0x3453dc1e,
 210         0xd699296e, 0x496cff6f, 0x1c9f4986, 0xdfe2ed07, 0xb87242d1,
 211         0x19de7eae, 0x053e561a, 0x15ad6f8c,
 212         0x66626c1c, 0x7154c24c, 0xea082b2a, 0x93eb2939, 0x17dcb0f0,
 213         0x58d4f2ae, 0x9ea294fb, 0x52cf564c,
 214         0x9883fe66, 0x2ec40581, 0x763953c3, 0x01d6692e, 0xd3a0c108,
 215         0xa1e7160e, 0xe4f2dfa6, 0x693ed285,
 216         0x74904698, 0x4c2b0edd, 0x4f757656, 0x5d393378, 0xa132234f,
 217         0x3d321c5d, 0xc3f5e194, 0x4b269301,
 218         0xc79f022f, 0x3c997e7e, 0x5e4f9504, 0x3ffafbbd, 0x76f7ad0e,
 219         0x296693f4, 0x3d1fce6f, 0xc61e45be,
 220         0xd3b5ab34, 0xf72bf9b7, 0x1b0434c0, 0x4e72b567, 0x5592a33d,
 221         0xb5229301, 0xcfd2a87f, 0x60aeb767,
 222         0x1814386b, 0x30bcc33d, 0x38a0c07d, 0xfd1606f2, 0xc363519b,
 223         0x589dd390, 0x5479f8e6, 0x1cb8d647,
 224         0x97fd61a9, 0xea7759f4, 0x2d57539d, 0x569a58cf, 0xe84e63ad,
 225         0x462e1b78, 0x6580f87e, 0xf3817914,
 226         0x91da55f4, 0x40a230f3, 0xd1988f35, 0xb6e318d2, 0x3ffa50bc,
 227         0x3d40f021, 0xc3c0bdae, 0x4958c24c,
 228         0x518f36b2, 0x84b1d370, 0x0fedce83, 0x878ddada, 0xf2a279c7,
 229         0x94e01be8, 0x90716f4b, 0x954b8aa3
 230 };
 231 static const u32 sb8[256] = {
 232         0xe216300d, 0xbbddfffc, 0xa7ebdabd, 0x35648095, 0x7789f8b7,
 233         0xe6c1121b, 0x0e241600, 0x052ce8b5,
 234         0x11a9cfb0, 0xe5952f11, 0xece7990a, 0x9386d174, 0x2a42931c,
 235         0x76e38111, 0xb12def3a, 0x37ddddfc,
 236         0xde9adeb1, 0x0a0cc32c, 0xbe197029, 0x84a00940, 0xbb243a0f,
 237         0xb4d137cf, 0xb44e79f0, 0x049eedfd,
 238         0x0b15a15d, 0x480d3168, 0x8bbbde5a, 0x669ded42, 0xc7ece831,
 239         0x3f8f95e7, 0x72df191b, 0x7580330d,
 240         0x94074251, 0x5c7dcdfa, 0xabbe6d63, 0xaa402164, 0xb301d40a,
 241         0x02e7d1ca, 0x53571dae, 0x7a3182a2,
 242         0x12a8ddec, 0xfdaa335d, 0x176f43e8, 0x71fb46d4, 0x38129022,
 243         0xce949ad4, 0xb84769ad, 0x965bd862,
 244         0x82f3d055, 0x66fb9767, 0x15b80b4e, 0x1d5b47a0, 0x4cfde06f,
 245         0xc28ec4b8, 0x57e8726e, 0x647a78fc,
 246         0x99865d44, 0x608bd593, 0x6c200e03, 0x39dc5ff6, 0x5d0b00a3,
 247         0xae63aff2, 0x7e8bd632, 0x70108c0c,
 248         0xbbd35049, 0x2998df04, 0x980cf42a, 0x9b6df491, 0x9e7edd53,
 249         0x06918548, 0x58cb7e07, 0x3b74ef2e,
 250         0x522fffb1, 0xd24708cc, 0x1c7e27cd, 0xa4eb215b, 0x3cf1d2e2,
 251         0x19b47a38, 0x424f7618, 0x35856039,
 252         0x9d17dee7, 0x27eb35e6, 0xc9aff67b, 0x36baf5b8, 0x09c467cd,
 253         0xc18910b1, 0xe11dbf7b, 0x06cd1af8,
 254         0x7170c608, 0x2d5e3354, 0xd4de495a, 0x64c6d006, 0xbcc0c62c,
 255         0x3dd00db3, 0x708f8f34, 0x77d51b42,
 256         0x264f620f, 0x24b8d2bf, 0x15c1b79e, 0x46a52564, 0xf8d7e54e,
 257         0x3e378160, 0x7895cda5, 0x859c15a5,
 258         0xe6459788, 0xc37bc75f, 0xdb07ba0c, 0x0676a3ab, 0x7f229b1e,
 259         0x31842e7b, 0x24259fd7, 0xf8bef472,
 260         0x835ffcb8, 0x6df4c1f2, 0x96f5b195, 0xfd0af0fc, 0xb0fe134c,
 261         0xe2506d3d, 0x4f9b12ea, 0xf215f225,
 262         0xa223736f, 0x9fb4c428, 0x25d04979, 0x34c713f8, 0xc4618187,
 263         0xea7a6e98, 0x7cd16efc, 0x1436876c,
 264         0xf1544107, 0xbedeee14, 0x56e9af27, 0xa04aa441, 0x3cf7c899,
 265         0x92ecbae6, 0xdd67016d, 0x151682eb,
 266         0xa842eedf, 0xfdba60b4, 0xf1907b75, 0x20e3030f, 0x24d8c29e,
 267         0xe139673b, 0xefa63fb8, 0x71873054,
 268         0xb6f2cf3b, 0x9f326442, 0xcb15a4cc, 0xb01a4504, 0xf1e47d8d,
 269         0x844a1be5, 0xbae7dfdc, 0x42cbda70,
 270         0xcd7dae0a, 0x57e85b7a, 0xd53f5af6, 0x20cf4d8c, 0xcea4d428,
 271         0x79d130a4, 0x3486ebfb, 0x33d3cddc,
 272         0x77853b53, 0x37effcb5, 0xc5068778, 0xe580b3e6, 0x4e68b8f4,
 273         0xc5c8b37e, 0x0d809ea2, 0x398feb7c,
 274         0x132a4f94, 0x43b7950e, 0x2fee7d1c, 0x223613bd, 0xdd06caa2,
 275         0x37df932b, 0xc4248289, 0xacf3ebc3,
 276         0x5715f6b7, 0xef3478dd, 0xf267616f, 0xc148cbe4, 0x9052815e,
 277         0x5e410fab, 0xb48a2465, 0x2eda7fa4,
 278         0xe87b40e4, 0xe98ea084, 0x5889e9e1, 0xefd390fc, 0xdd07d35b,
 279         0xdb485694, 0x38d7e5b2, 0x57720101,
 280         0x730edebc, 0x5b643113, 0x94917e4f, 0x503c2fba, 0x646f1282,
 281         0x7523d24a, 0xe0779695, 0xf9c17a8f,
 282         0x7a5b2121, 0xd187b896, 0x29263a4d, 0xba510cdf, 0x81f47c9f,
 283         0xad1163ed, 0xea7b5965, 0x1a00726e,
 284         0x11403092, 0x00da6d77, 0x4a0cdd61, 0xad1f4603, 0x605bdfb0,
 285         0x9eedc364, 0x22ebe6a8, 0xcee7d28a,
 286         0xa0e736a0, 0x5564a6b9, 0x10853209, 0xc7eb8f37, 0x2de705ca,
 287         0x8951570f, 0xdf09822b, 0xbd691a6c,
 288         0xaa12e4f2, 0x87451c0f, 0xe0f6a27a, 0x3ada4819, 0x4cf1764f,
 289         0x0d771c2b, 0x67cdb156, 0x350d8384,
 290         0x5938fa0f, 0x42399ef3, 0x36997b07, 0x0e84093d, 0x4aa93e61,
 291         0x8360d87b, 0x1fa98b0c, 0x1149382c,
 292         0xe97625a5, 0x0614d1b7, 0x0e25244b, 0x0c768347, 0x589e8d82,
 293         0x0d2059d1, 0xa466bb1e, 0xf8da0a82,
 294         0x04f19130, 0xba6e4ec0, 0x99265164, 0x1ee7230d, 0x50b2ad80,
 295         0xeaee6801, 0x8db2a283, 0xea8bf59e
 296 };
 297
 298 #define s1 cast_s1
 299 #define s2 cast_s2
 300 #define s3 cast_s3
 301 #define s4 cast_s4
 302
 303 #define F1(D, m, r)  ((I = ((m) + (D))), (I = rol32(I, (r))),   \
 304         (((s1[I >> 24] ^ s2[(I>>16)&0xff]) - s3[(I>>8)&0xff]) + s4[I&0xff]))
 305 #define F2(D, m, r)  ((I = ((m) ^ (D))), (I = rol32(I, (r))),   \
 306         (((s1[I >> 24] - s2[(I>>16)&0xff]) + s3[(I>>8)&0xff]) ^ s4[I&0xff]))
 307 #define F3(D, m, r)  ((I = ((m) - (D))), (I = rol32(I, (r))),   \
 308         (((s1[I >> 24] + s2[(I>>16)&0xff]) ^ s3[(I>>8)&0xff]) - s4[I&0xff]))
 309
 310
 311 void __cast5_encrypt(struct cast5_ctx *c, u8 *outbuf, const u8 *inbuf)
 312 {
 313         const __be32 *src = (const __be32 *)inbuf;
 314         __be32 *dst = (__be32 *)outbuf;
 315         u32 l, r, t;
 316         u32 I;                  /* used by the Fx macros */
 317         u32 *Km;
 318         u8 *Kr;
 319
 320         Km = c->Km;
 321         Kr = c->Kr;
 322
 323         /* (L0,R0) <-- (m1...m64).  (Split the plaintext into left and
 324          * right 32-bit halves L0 = m1...m32 and R0 = m33...m64.)
 325          */
 326         l = be32_to_cpu(src[0]);
 327         r = be32_to_cpu(src[1]);
 328
 329         /* (16 rounds) for i from 1 to 16, compute Li and Ri as follows:
 330          *  Li = Ri-1;
 331          *  Ri = Li-1 ^ f(Ri-1,Kmi,Kri), where f is defined in Section 2.2
 332          * Rounds 1, 4, 7, 10, 13, and 16 use f function Type 1.
 333          * Rounds 2, 5, 8, 11, and 14 use f function Type 2.
 334          * Rounds 3, 6, 9, 12, and 15 use f function Type 3.
 335          */
 336
 337         t = l; l = r; r = t ^ F1(r, Km[0], Kr[0]);
 338         t = l; l = r; r = t ^ F2(r, Km[1], Kr[1]);
 339         t = l; l = r; r = t ^ F3(r, Km[2], Kr[2]);
 340         t = l; l = r; r = t ^ F1(r, Km[3], Kr[3]);
 341         t = l; l = r; r = t ^ F2(r, Km[4], Kr[4]);
 342         t = l; l = r; r = t ^ F3(r, Km[5], Kr[5]);
 343         t = l; l = r; r = t ^ F1(r, Km[6], Kr[6]);
 344         t = l; l = r; r = t ^ F2(r, Km[7], Kr[7]);
 345         t = l; l = r; r = t ^ F3(r, Km[8], Kr[8]);
 346         t = l; l = r; r = t ^ F1(r, Km[9], Kr[9]);
 347         t = l; l = r; r = t ^ F2(r, Km[10], Kr[10]);
 348         t = l; l = r; r = t ^ F3(r, Km[11], Kr[11]);
 349         if (!(c->rr)) {
 350                 t = l; l = r; r = t ^ F1(r, Km[12], Kr[12]);
 351                 t = l; l = r; r = t ^ F2(r, Km[13], Kr[13]);
 352                 t = l; l = r; r = t ^ F3(r, Km[14], Kr[14]);
 353                 t = l; l = r; r = t ^ F1(r, Km[15], Kr[15]);
 354         }
 355
 356         /* c1...c64 <-- (R16,L16).  (Exchange final blocks L16, R16 and
 357          *  concatenate to form the ciphertext.) */
 358         dst[0] = cpu_to_be32(r);
 359         dst[1] = cpu_to_be32(l);
 360 }
 361 EXPORT_SYMBOL_GPL(__cast5_encrypt);
 362
 363 static void cast5_encrypt(struct crypto_tfm *tfm, u8 *outbuf, const u8 *inbuf)
 364 {
 365         __cast5_encrypt(crypto_tfm_ctx(tfm), outbuf, inbuf);
 366 }
 367
 368 void __cast5_decrypt(struct cast5_ctx *c, u8 *outbuf, const u8 *inbuf)
 369 {
 370         const __be32 *src = (const __be32 *)inbuf;
 371         __be32 *dst = (__be32 *)outbuf;
 372         u32 l, r, t;
 373         u32 I;
 374         u32 *Km;
 375         u8 *Kr;
 376
 377         Km = c->Km;
 378         Kr = c->Kr;
 379
 380         l = be32_to_cpu(src[0]);
 381         r = be32_to_cpu(src[1]);
 382
 383         if (!(c->rr)) {
 384                 t = l; l = r; r = t ^ F1(r, Km[15], Kr[15]);
 385                 t = l; l = r; r = t ^ F3(r, Km[14], Kr[14]);
 386                 t = l; l = r; r = t ^ F2(r, Km[13], Kr[13]);
 387                 t = l; l = r; r = t ^ F1(r, Km[12], Kr[12]);
 388         }
 389         t = l; l = r; r = t ^ F3(r, Km[11], Kr[11]);
 390         t = l; l = r; r = t ^ F2(r, Km[10], Kr[10]);
 391         t = l; l = r; r = t ^ F1(r, Km[9], Kr[9]);
 392         t = l; l = r; r = t ^ F3(r, Km[8], Kr[8]);
 393         t = l; l = r; r = t ^ F2(r, Km[7], Kr[7]);
 394         t = l; l = r; r = t ^ F1(r, Km[6], Kr[6]);
 395         t = l; l = r; r = t ^ F3(r, Km[5], Kr[5]);
 396         t = l; l = r; r = t ^ F2(r, Km[4], Kr[4]);
 397         t = l; l = r; r = t ^ F1(r, Km[3], Kr[3]);
 398         t = l; l = r; r = t ^ F3(r, Km[2], Kr[2]);
 399         t = l; l = r; r = t ^ F2(r, Km[1], Kr[1]);
 400         t = l; l = r; r = t ^ F1(r, Km[0], Kr[0]);
 401
 402         dst[0] = cpu_to_be32(r);
 403         dst[1] = cpu_to_be32(l);
 404 }
 405 EXPORT_SYMBOL_GPL(__cast5_decrypt);
 406
 407 static void cast5_decrypt(struct crypto_tfm *tfm, u8 *outbuf, const u8 *inbuf)
 408 {
 409         __cast5_decrypt(crypto_tfm_ctx(tfm), outbuf, inbuf);
 410 }
 411
 412 static void key_schedule(u32 *x, u32 *z, u32 *k)
 413 {
 414
 415 #define xi(i)   ((x[(i)/4] >> (8*(3-((i)%4)))) & 0xff)
 416 #define zi(i)   ((z[(i)/4] >> (8*(3-((i)%4)))) & 0xff)
 417
 418         z[0] = x[0] ^ s5[xi(13)] ^ s6[xi(15)] ^ s7[xi(12)] ^ sb8[xi(14)] ^
 419             s7[xi(8)];
 420         z[1] = x[2] ^ s5[zi(0)] ^ s6[zi(2)] ^ s7[zi(1)] ^ sb8[zi(3)] ^
 421             sb8[xi(10)];
 422         z[2] = x[3] ^ s5[zi(7)] ^ s6[zi(6)] ^ s7[zi(5)] ^ sb8[zi(4)] ^
 423             s5[xi(9)];
 424         z[3] = x[1] ^ s5[zi(10)] ^ s6[zi(9)] ^ s7[zi(11)] ^ sb8[zi(8)] ^
 425             s6[xi(11)];
 426         k[0] = s5[zi(8)] ^ s6[zi(9)] ^ s7[zi(7)] ^ sb8[zi(6)] ^ s5[zi(2)];
 427         k[1] = s5[zi(10)] ^ s6[zi(11)] ^ s7[zi(5)] ^ sb8[zi(4)] ^
 428             s6[zi(6)];
 429         k[2] = s5[zi(12)] ^ s6[zi(13)] ^ s7[zi(3)] ^ sb8[zi(2)] ^
 430             s7[zi(9)];
 431         k[3] = s5[zi(14)] ^ s6[zi(15)] ^ s7[zi(1)] ^ sb8[zi(0)] ^
 432             sb8[zi(12)];
 433
 434         x[0] = z[2] ^ s5[zi(5)] ^ s6[zi(7)] ^ s7[zi(4)] ^ sb8[zi(6)] ^
 435             s7[zi(0)];
 436         x[1] = z[0] ^ s5[xi(0)] ^ s6[xi(2)] ^ s7[xi(1)] ^ sb8[xi(3)] ^
 437             sb8[zi(2)];
 438         x[2] = z[1] ^ s5[xi(7)] ^ s6[xi(6)] ^ s7[xi(5)] ^ sb8[xi(4)] ^
 439             s5[zi(1)];
 440         x[3] = z[3] ^ s5[xi(10)] ^ s6[xi(9)] ^ s7[xi(11)] ^ sb8[xi(8)] ^
 441             s6[zi(3)];
 442         k[4] = s5[xi(3)] ^ s6[xi(2)] ^ s7[xi(12)] ^ sb8[xi(13)] ^
 443             s5[xi(8)];
 444         k[5] = s5[xi(1)] ^ s6[xi(0)] ^ s7[xi(14)] ^ sb8[xi(15)] ^
 445             s6[xi(13)];
 446         k[6] = s5[xi(7)] ^ s6[xi(6)] ^ s7[xi(8)] ^ sb8[xi(9)] ^ s7[xi(3)];
 447         k[7] = s5[xi(5)] ^ s6[xi(4)] ^ s7[xi(10)] ^ sb8[xi(11)] ^
 448             sb8[xi(7)];
 449
 450         z[0] = x[0] ^ s5[xi(13)] ^ s6[xi(15)] ^ s7[xi(12)] ^ sb8[xi(14)] ^
 451             s7[xi(8)];
 452         z[1] = x[2] ^ s5[zi(0)] ^ s6[zi(2)] ^ s7[zi(1)] ^ sb8[zi(3)] ^
 453             sb8[xi(10)];
 454         z[2] = x[3] ^ s5[zi(7)] ^ s6[zi(6)] ^ s7[zi(5)] ^ sb8[zi(4)] ^
 455             s5[xi(9)];
 456         z[3] = x[1] ^ s5[zi(10)] ^ s6[zi(9)] ^ s7[zi(11)] ^ sb8[zi(8)] ^
 457             s6[xi(11)];
 458         k[8] = s5[zi(3)] ^ s6[zi(2)] ^ s7[zi(12)] ^ sb8[zi(13)] ^
 459             s5[zi(9)];
 460         k[9] = s5[zi(1)] ^ s6[zi(0)] ^ s7[zi(14)] ^ sb8[zi(15)] ^
 461             s6[zi(12)];
 462         k[10] = s5[zi(7)] ^ s6[zi(6)] ^ s7[zi(8)] ^ sb8[zi(9)] ^ s7[zi(2)];
 463         k[11] = s5[zi(5)] ^ s6[zi(4)] ^ s7[zi(10)] ^ sb8[zi(11)] ^
 464             sb8[zi(6)];
 465
 466         x[0] = z[2] ^ s5[zi(5)] ^ s6[zi(7)] ^ s7[zi(4)] ^ sb8[zi(6)] ^
 467             s7[zi(0)];
 468         x[1] = z[0] ^ s5[xi(0)] ^ s6[xi(2)] ^ s7[xi(1)] ^ sb8[xi(3)] ^
 469             sb8[zi(2)];
 470         x[2] = z[1] ^ s5[xi(7)] ^ s6[xi(6)] ^ s7[xi(5)] ^ sb8[xi(4)] ^
 471             s5[zi(1)];
 472         x[3] = z[3] ^ s5[xi(10)] ^ s6[xi(9)] ^ s7[xi(11)] ^ sb8[xi(8)] ^
 473             s6[zi(3)];
 474         k[12] = s5[xi(8)] ^ s6[xi(9)] ^ s7[xi(7)] ^ sb8[xi(6)] ^ s5[xi(3)];
 475         k[13] = s5[xi(10)] ^ s6[xi(11)] ^ s7[xi(5)] ^ sb8[xi(4)] ^
 476             s6[xi(7)];
 477         k[14] = s5[xi(12)] ^ s6[xi(13)] ^ s7[xi(3)] ^ sb8[xi(2)] ^
 478             s7[xi(8)];
 479         k[15] = s5[xi(14)] ^ s6[xi(15)] ^ s7[xi(1)] ^ sb8[xi(0)] ^
 480             sb8[xi(13)];
 481
 482 #undef xi
 483 #undef zi
 484 }
 485
 486
 487 int cast5_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int key_len)
 488 {
 489         struct cast5_ctx *c = crypto_tfm_ctx(tfm);
 490         int i;
 491         u32 x[4];
 492         u32 z[4];
 493         u32 k[16];
 494         __be32 p_key[4];
 495
 496         c->rr = key_len <= 10 ? 1 : 0;
 497
 498         memset(p_key, 0, 16);
 499         memcpy(p_key, key, key_len);
 500
 501
 502         x[0] = be32_to_cpu(p_key[0]);
 503         x[1] = be32_to_cpu(p_key[1]);
 504         x[2] = be32_to_cpu(p_key[2]);
 505         x[3] = be32_to_cpu(p_key[3]);
 506
 507         key_schedule(x, z, k);
 508         for (i = 0; i < 16; i++)
 509                 c->Km[i] = k[i];
 510         key_schedule(x, z, k);
 511         for (i = 0; i < 16; i++)
 512                 c->Kr[i] = k[i] & 0x1f;
 513         return 0;
 514 }
 515 EXPORT_SYMBOL_GPL(cast5_setkey);
 516
 517 static struct crypto_alg alg = {
 518         .cra_name               = "cast5",
 519         .cra_driver_name        = "cast5-generic",
 520         .cra_priority           = 100,
 521         .cra_flags              = CRYPTO_ALG_TYPE_CIPHER,
 522         .cra_blocksize          = CAST5_BLOCK_SIZE,
 523         .cra_ctxsize            = sizeof(struct cast5_ctx),
 524         .cra_alignmask          = 3,
 525         .cra_module             = THIS_MODULE,
 526         .cra_u                  = {
 527                 .cipher = {
 528                         .cia_min_keysize = CAST5_MIN_KEY_SIZE,
 529                         .cia_max_keysize = CAST5_MAX_KEY_SIZE,
 530                         .cia_setkey  = cast5_setkey,
 531                         .cia_encrypt = cast5_encrypt,
 532                         .cia_decrypt = cast5_decrypt
 533                 }
 534         }
 535 };
 536
 537 static int __init cast5_mod_init(void)
 538 {
 539         return crypto_register_alg(&alg);
 540 }
 541
 542 static void __exit cast5_mod_fini(void)
 543 {
 544         crypto_unregister_alg(&alg);
 545 }
 546
 547 module_init(cast5_mod_init);
 548 module_exit(cast5_mod_fini);
 549
 550 MODULE_LICENSE("GPL");
 551 MODULE_DESCRIPTION("Cast5 Cipher Algorithm");
 552 MODULE_ALIAS("cast5");