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, see <http://www.gnu.org/licenses/>.
20*/
21
22
23#include <asm/byteorder.h>
24#include <linux/init.h>
25#include <linux/crypto.h>
26#include <linux/module.h>
27#include <linux/errno.h>
28#include <linux/string.h>
29#include <linux/types.h>
30#include <crypto/cast5.h>
31
32static const u32 s5[256] = {
33 0x7ec90c04, 0x2c6e74b9, 0x9b0e66df, 0xa6337911, 0xb86a7fff,
34 0x1dd358f5, 0x44dd9d44, 0x1731167f,
35 0x08fbf1fa, 0xe7f511cc, 0xd2051b00, 0x735aba00, 0x2ab722d8,
36 0x386381cb, 0xacf6243a, 0x69befd7a,
37 0xe6a2e77f, 0xf0c720cd, 0xc4494816, 0xccf5c180, 0x38851640,
38 0x15b0a848, 0xe68b18cb, 0x4caadeff,
39 0x5f480a01, 0x0412b2aa, 0x259814fc, 0x41d0efe2, 0x4e40b48d,
40 0x248eb6fb, 0x8dba1cfe, 0x41a99b02,
41 0x1a550a04, 0xba8f65cb, 0x7251f4e7, 0x95a51725, 0xc106ecd7,
42 0x97a5980a, 0xc539b9aa, 0x4d79fe6a,
43 0xf2f3f763, 0x68af8040, 0xed0c9e56, 0x11b4958b, 0xe1eb5a88,
44 0x8709e6b0, 0xd7e07156, 0x4e29fea7,
45 0x6366e52d, 0x02d1c000, 0xc4ac8e05, 0x9377f571, 0x0c05372a,
46 0x578535f2, 0x2261be02, 0xd642a0c9,
47 0xdf13a280, 0x74b55bd2, 0x682199c0, 0xd421e5ec, 0x53fb3ce8,
48 0xc8adedb3, 0x28a87fc9, 0x3d959981,
49 0x5c1ff900, 0xfe38d399, 0x0c4eff0b, 0x062407ea, 0xaa2f4fb1,
50 0x4fb96976, 0x90c79505, 0xb0a8a774,
51 0xef55a1ff, 0xe59ca2c2, 0xa6b62d27, 0xe66a4263, 0xdf65001f,
52 0x0ec50966, 0xdfdd55bc, 0x29de0655,
53 0x911e739a, 0x17af8975, 0x32c7911c, 0x89f89468, 0x0d01e980,
54 0x524755f4, 0x03b63cc9, 0x0cc844b2,
55 0xbcf3f0aa, 0x87ac36e9, 0xe53a7426, 0x01b3d82b, 0x1a9e7449,
56 0x64ee2d7e, 0xcddbb1da, 0x01c94910,
57 0xb868bf80, 0x0d26f3fd, 0x9342ede7, 0x04a5c284, 0x636737b6,
58 0x50f5b616, 0xf24766e3, 0x8eca36c1,
59 0x136e05db, 0xfef18391, 0xfb887a37, 0xd6e7f7d4, 0xc7fb7dc9,
60 0x3063fcdf, 0xb6f589de, 0xec2941da,
61 0x26e46695, 0xb7566419, 0xf654efc5, 0xd08d58b7, 0x48925401,
62 0xc1bacb7f, 0xe5ff550f, 0xb6083049,
63 0x5bb5d0e8, 0x87d72e5a, 0xab6a6ee1, 0x223a66ce, 0xc62bf3cd,
64 0x9e0885f9, 0x68cb3e47, 0x086c010f,
65 0xa21de820, 0xd18b69de, 0xf3f65777, 0xfa02c3f6, 0x407edac3,
66 0xcbb3d550, 0x1793084d, 0xb0d70eba,
67 0x0ab378d5, 0xd951fb0c, 0xded7da56, 0x4124bbe4, 0x94ca0b56,
68 0x0f5755d1, 0xe0e1e56e, 0x6184b5be,
69 0x580a249f, 0x94f74bc0, 0xe327888e, 0x9f7b5561, 0xc3dc0280,
70 0x05687715, 0x646c6bd7, 0x44904db3,
71 0x66b4f0a3, 0xc0f1648a, 0x697ed5af, 0x49e92ff6, 0x309e374f,
72 0x2cb6356a, 0x85808573, 0x4991f840,
73 0x76f0ae02, 0x083be84d, 0x28421c9a, 0x44489406, 0x736e4cb8,
74 0xc1092910, 0x8bc95fc6, 0x7d869cf4,
75 0x134f616f, 0x2e77118d, 0xb31b2be1, 0xaa90b472, 0x3ca5d717,
76 0x7d161bba, 0x9cad9010, 0xaf462ba2,
77 0x9fe459d2, 0x45d34559, 0xd9f2da13, 0xdbc65487, 0xf3e4f94e,
78 0x176d486f, 0x097c13ea, 0x631da5c7,
79 0x445f7382, 0x175683f4, 0xcdc66a97, 0x70be0288, 0xb3cdcf72,
80 0x6e5dd2f3, 0x20936079, 0x459b80a5,
81 0xbe60e2db, 0xa9c23101, 0xeba5315c, 0x224e42f2, 0x1c5c1572,
82 0xf6721b2c, 0x1ad2fff3, 0x8c25404e,
83 0x324ed72f, 0x4067b7fd, 0x0523138e, 0x5ca3bc78, 0xdc0fd66e,
84 0x75922283, 0x784d6b17, 0x58ebb16e,
85 0x44094f85, 0x3f481d87, 0xfcfeae7b, 0x77b5ff76, 0x8c2302bf,
86 0xaaf47556, 0x5f46b02a, 0x2b092801,
87 0x3d38f5f7, 0x0ca81f36, 0x52af4a8a, 0x66d5e7c0, 0xdf3b0874,
88 0x95055110, 0x1b5ad7a8, 0xf61ed5ad,
89 0x6cf6e479, 0x20758184, 0xd0cefa65, 0x88f7be58, 0x4a046826,
90 0x0ff6f8f3, 0xa09c7f70, 0x5346aba0,
91 0x5ce96c28, 0xe176eda3, 0x6bac307f, 0x376829d2, 0x85360fa9,
92 0x17e3fe2a, 0x24b79767, 0xf5a96b20,
93 0xd6cd2595, 0x68ff1ebf, 0x7555442c, 0xf19f06be, 0xf9e0659a,
94 0xeeb9491d, 0x34010718, 0xbb30cab8,
95 0xe822fe15, 0x88570983, 0x750e6249, 0xda627e55, 0x5e76ffa8,
96 0xb1534546, 0x6d47de08, 0xefe9e7d4
97};
98static const u32 s6[256] = {
99 0xf6fa8f9d, 0x2cac6ce1, 0x4ca34867, 0xe2337f7c, 0x95db08e7,
100 0x016843b4, 0xeced5cbc, 0x325553ac,
101 0xbf9f0960, 0xdfa1e2ed, 0x83f0579d, 0x63ed86b9, 0x1ab6a6b8,
102 0xde5ebe39, 0xf38ff732, 0x8989b138,
103 0x33f14961, 0xc01937bd, 0xf506c6da, 0xe4625e7e, 0xa308ea99,
104 0x4e23e33c, 0x79cbd7cc, 0x48a14367,
105 0xa3149619, 0xfec94bd5, 0xa114174a, 0xeaa01866, 0xa084db2d,
106 0x09a8486f, 0xa888614a, 0x2900af98,
107 0x01665991, 0xe1992863, 0xc8f30c60, 0x2e78ef3c, 0xd0d51932,
108 0xcf0fec14, 0xf7ca07d2, 0xd0a82072,
109 0xfd41197e, 0x9305a6b0, 0xe86be3da, 0x74bed3cd, 0x372da53c,
110 0x4c7f4448, 0xdab5d440, 0x6dba0ec3,
111 0x083919a7, 0x9fbaeed9, 0x49dbcfb0, 0x4e670c53, 0x5c3d9c01,
112 0x64bdb941, 0x2c0e636a, 0xba7dd9cd,
113 0xea6f7388, 0xe70bc762, 0x35f29adb, 0x5c4cdd8d, 0xf0d48d8c,
114 0xb88153e2, 0x08a19866, 0x1ae2eac8,
115 0x284caf89, 0xaa928223, 0x9334be53, 0x3b3a21bf, 0x16434be3,
116 0x9aea3906, 0xefe8c36e, 0xf890cdd9,
117 0x80226dae, 0xc340a4a3, 0xdf7e9c09, 0xa694a807, 0x5b7c5ecc,
118 0x221db3a6, 0x9a69a02f, 0x68818a54,
119 0xceb2296f, 0x53c0843a, 0xfe893655, 0x25bfe68a, 0xb4628abc,
120 0xcf222ebf, 0x25ac6f48, 0xa9a99387,
121 0x53bddb65, 0xe76ffbe7, 0xe967fd78, 0x0ba93563, 0x8e342bc1,
122 0xe8a11be9, 0x4980740d, 0xc8087dfc,
123 0x8de4bf99, 0xa11101a0, 0x7fd37975, 0xda5a26c0, 0xe81f994f,
124 0x9528cd89, 0xfd339fed, 0xb87834bf,
125 0x5f04456d, 0x22258698, 0xc9c4c83b, 0x2dc156be, 0x4f628daa,
126 0x57f55ec5, 0xe2220abe, 0xd2916ebf,
127 0x4ec75b95, 0x24f2c3c0, 0x42d15d99, 0xcd0d7fa0, 0x7b6e27ff,
128 0xa8dc8af0, 0x7345c106, 0xf41e232f,
129 0x35162386, 0xe6ea8926, 0x3333b094, 0x157ec6f2, 0x372b74af,
130 0x692573e4, 0xe9a9d848, 0xf3160289,
131 0x3a62ef1d, 0xa787e238, 0xf3a5f676, 0x74364853, 0x20951063,
132 0x4576698d, 0xb6fad407, 0x592af950,
133 0x36f73523, 0x4cfb6e87, 0x7da4cec0, 0x6c152daa, 0xcb0396a8,
134 0xc50dfe5d, 0xfcd707ab, 0x0921c42f,
135 0x89dff0bb, 0x5fe2be78, 0x448f4f33, 0x754613c9, 0x2b05d08d,
136 0x48b9d585, 0xdc049441, 0xc8098f9b,
137 0x7dede786, 0xc39a3373, 0x42410005, 0x6a091751, 0x0ef3c8a6,
138 0x890072d6, 0x28207682, 0xa9a9f7be,
139 0xbf32679d, 0xd45b5b75, 0xb353fd00, 0xcbb0e358, 0x830f220a,
140 0x1f8fb214, 0xd372cf08, 0xcc3c4a13,
141 0x8cf63166, 0x061c87be, 0x88c98f88, 0x6062e397, 0x47cf8e7a,
142 0xb6c85283, 0x3cc2acfb, 0x3fc06976,
143 0x4e8f0252, 0x64d8314d, 0xda3870e3, 0x1e665459, 0xc10908f0,
144 0x513021a5, 0x6c5b68b7, 0x822f8aa0,
145 0x3007cd3e, 0x74719eef, 0xdc872681, 0x073340d4, 0x7e432fd9,
146 0x0c5ec241, 0x8809286c, 0xf592d891,
147 0x08a930f6, 0x957ef305, 0xb7fbffbd, 0xc266e96f, 0x6fe4ac98,
148 0xb173ecc0, 0xbc60b42a, 0x953498da,
149 0xfba1ae12, 0x2d4bd736, 0x0f25faab, 0xa4f3fceb, 0xe2969123,
150 0x257f0c3d, 0x9348af49, 0x361400bc,
151 0xe8816f4a, 0x3814f200, 0xa3f94043, 0x9c7a54c2, 0xbc704f57,
152 0xda41e7f9, 0xc25ad33a, 0x54f4a084,
153 0xb17f5505, 0x59357cbe, 0xedbd15c8, 0x7f97c5ab, 0xba5ac7b5,
154 0xb6f6deaf, 0x3a479c3a, 0x5302da25,
155 0x653d7e6a, 0x54268d49, 0x51a477ea, 0x5017d55b, 0xd7d25d88,
156 0x44136c76, 0x0404a8c8, 0xb8e5a121,
157 0xb81a928a, 0x60ed5869, 0x97c55b96, 0xeaec991b, 0x29935913,
158 0x01fdb7f1, 0x088e8dfa, 0x9ab6f6f5,
159 0x3b4cbf9f, 0x4a5de3ab, 0xe6051d35, 0xa0e1d855, 0xd36b4cf1,
160 0xf544edeb, 0xb0e93524, 0xbebb8fbd,
161 0xa2d762cf, 0x49c92f54, 0x38b5f331, 0x7128a454, 0x48392905,
162 0xa65b1db8, 0x851c97bd, 0xd675cf2f
163};
164static const u32 s7[256] = {
165 0x85e04019, 0x332bf567, 0x662dbfff, 0xcfc65693, 0x2a8d7f6f,
166 0xab9bc912, 0xde6008a1, 0x2028da1f,
167 0x0227bce7, 0x4d642916, 0x18fac300, 0x50f18b82, 0x2cb2cb11,
168 0xb232e75c, 0x4b3695f2, 0xb28707de,
169 0xa05fbcf6, 0xcd4181e9, 0xe150210c, 0xe24ef1bd, 0xb168c381,
170 0xfde4e789, 0x5c79b0d8, 0x1e8bfd43,
171 0x4d495001, 0x38be4341, 0x913cee1d, 0x92a79c3f, 0x089766be,
172 0xbaeeadf4, 0x1286becf, 0xb6eacb19,
173 0x2660c200, 0x7565bde4, 0x64241f7a, 0x8248dca9, 0xc3b3ad66,
174 0x28136086, 0x0bd8dfa8, 0x356d1cf2,
175 0x107789be, 0xb3b2e9ce, 0x0502aa8f, 0x0bc0351e, 0x166bf52a,
176 0xeb12ff82, 0xe3486911, 0xd34d7516,
177 0x4e7b3aff, 0x5f43671b, 0x9cf6e037, 0x4981ac83, 0x334266ce,
178 0x8c9341b7, 0xd0d854c0, 0xcb3a6c88,
179 0x47bc2829, 0x4725ba37, 0xa66ad22b, 0x7ad61f1e, 0x0c5cbafa,
180 0x4437f107, 0xb6e79962, 0x42d2d816,
181 0x0a961288, 0xe1a5c06e, 0x13749e67, 0x72fc081a, 0xb1d139f7,
182 0xf9583745, 0xcf19df58, 0xbec3f756,
183 0xc06eba30, 0x07211b24, 0x45c28829, 0xc95e317f, 0xbc8ec511,
184 0x38bc46e9, 0xc6e6fa14, 0xbae8584a,
185 0xad4ebc46, 0x468f508b, 0x7829435f, 0xf124183b, 0x821dba9f,
186 0xaff60ff4, 0xea2c4e6d, 0x16e39264,
187 0x92544a8b, 0x009b4fc3, 0xaba68ced, 0x9ac96f78, 0x06a5b79a,
188 0xb2856e6e, 0x1aec3ca9, 0xbe838688,
189 0x0e0804e9, 0x55f1be56, 0xe7e5363b, 0xb3a1f25d, 0xf7debb85,
190 0x61fe033c, 0x16746233, 0x3c034c28,
191 0xda6d0c74, 0x79aac56c, 0x3ce4e1ad, 0x51f0c802, 0x98f8f35a,
192 0x1626a49f, 0xeed82b29, 0x1d382fe3,
193 0x0c4fb99a, 0xbb325778, 0x3ec6d97b, 0x6e77a6a9, 0xcb658b5c,
194 0xd45230c7, 0x2bd1408b, 0x60c03eb7,
195 0xb9068d78, 0xa33754f4, 0xf430c87d, 0xc8a71302, 0xb96d8c32,
196 0xebd4e7be, 0xbe8b9d2d, 0x7979fb06,
197 0xe7225308, 0x8b75cf77, 0x11ef8da4, 0xe083c858, 0x8d6b786f,
198 0x5a6317a6, 0xfa5cf7a0, 0x5dda0033,
199 0xf28ebfb0, 0xf5b9c310, 0xa0eac280, 0x08b9767a, 0xa3d9d2b0,
200 0x79d34217, 0x021a718d, 0x9ac6336a,
201 0x2711fd60, 0x438050e3, 0x069908a8, 0x3d7fedc4, 0x826d2bef,
202 0x4eeb8476, 0x488dcf25, 0x36c9d566,
203 0x28e74e41, 0xc2610aca, 0x3d49a9cf, 0xbae3b9df, 0xb65f8de6,
204 0x92aeaf64, 0x3ac7d5e6, 0x9ea80509,
205 0xf22b017d, 0xa4173f70, 0xdd1e16c3, 0x15e0d7f9, 0x50b1b887,
206 0x2b9f4fd5, 0x625aba82, 0x6a017962,
207 0x2ec01b9c, 0x15488aa9, 0xd716e740, 0x40055a2c, 0x93d29a22,
208 0xe32dbf9a, 0x058745b9, 0x3453dc1e,
209 0xd699296e, 0x496cff6f, 0x1c9f4986, 0xdfe2ed07, 0xb87242d1,
210 0x19de7eae, 0x053e561a, 0x15ad6f8c,
211 0x66626c1c, 0x7154c24c, 0xea082b2a, 0x93eb2939, 0x17dcb0f0,
212 0x58d4f2ae, 0x9ea294fb, 0x52cf564c,
213 0x9883fe66, 0x2ec40581, 0x763953c3, 0x01d6692e, 0xd3a0c108,
214 0xa1e7160e, 0xe4f2dfa6, 0x693ed285,
215 0x74904698, 0x4c2b0edd, 0x4f757656, 0x5d393378, 0xa132234f,
216 0x3d321c5d, 0xc3f5e194, 0x4b269301,
217 0xc79f022f, 0x3c997e7e, 0x5e4f9504, 0x3ffafbbd, 0x76f7ad0e,
218 0x296693f4, 0x3d1fce6f, 0xc61e45be,
219 0xd3b5ab34, 0xf72bf9b7, 0x1b0434c0, 0x4e72b567, 0x5592a33d,
220 0xb5229301, 0xcfd2a87f, 0x60aeb767,
221 0x1814386b, 0x30bcc33d, 0x38a0c07d, 0xfd1606f2, 0xc363519b,
222 0x589dd390, 0x5479f8e6, 0x1cb8d647,
223 0x97fd61a9, 0xea7759f4, 0x2d57539d, 0x569a58cf, 0xe84e63ad,
224 0x462e1b78, 0x6580f87e, 0xf3817914,
225 0x91da55f4, 0x40a230f3, 0xd1988f35, 0xb6e318d2, 0x3ffa50bc,
226 0x3d40f021, 0xc3c0bdae, 0x4958c24c,
227 0x518f36b2, 0x84b1d370, 0x0fedce83, 0x878ddada, 0xf2a279c7,
228 0x94e01be8, 0x90716f4b, 0x954b8aa3
229};
230static const u32 sb8[256] = {
231 0xe216300d, 0xbbddfffc, 0xa7ebdabd, 0x35648095, 0x7789f8b7,
232 0xe6c1121b, 0x0e241600, 0x052ce8b5,
233 0x11a9cfb0, 0xe5952f11, 0xece7990a, 0x9386d174, 0x2a42931c,
234 0x76e38111, 0xb12def3a, 0x37ddddfc,
235 0xde9adeb1, 0x0a0cc32c, 0xbe197029, 0x84a00940, 0xbb243a0f,
236 0xb4d137cf, 0xb44e79f0, 0x049eedfd,
237 0x0b15a15d, 0x480d3168, 0x8bbbde5a, 0x669ded42, 0xc7ece831,
238 0x3f8f95e7, 0x72df191b, 0x7580330d,
239 0x94074251, 0x5c7dcdfa, 0xabbe6d63, 0xaa402164, 0xb301d40a,
240 0x02e7d1ca, 0x53571dae, 0x7a3182a2,
241 0x12a8ddec, 0xfdaa335d, 0x176f43e8, 0x71fb46d4, 0x38129022,
242 0xce949ad4, 0xb84769ad, 0x965bd862,
243 0x82f3d055, 0x66fb9767, 0x15b80b4e, 0x1d5b47a0, 0x4cfde06f,
244 0xc28ec4b8, 0x57e8726e, 0x647a78fc,
245 0x99865d44, 0x608bd593, 0x6c200e03, 0x39dc5ff6, 0x5d0b00a3,
246 0xae63aff2, 0x7e8bd632, 0x70108c0c,
247 0xbbd35049, 0x2998df04, 0x980cf42a, 0x9b6df491, 0x9e7edd53,
248 0x06918548, 0x58cb7e07, 0x3b74ef2e,
249 0x522fffb1, 0xd24708cc, 0x1c7e27cd, 0xa4eb215b, 0x3cf1d2e2,
250 0x19b47a38, 0x424f7618, 0x35856039,
251 0x9d17dee7, 0x27eb35e6, 0xc9aff67b, 0x36baf5b8, 0x09c467cd,
252 0xc18910b1, 0xe11dbf7b, 0x06cd1af8,
253 0x7170c608, 0x2d5e3354, 0xd4de495a, 0x64c6d006, 0xbcc0c62c,
254 0x3dd00db3, 0x708f8f34, 0x77d51b42,
255 0x264f620f, 0x24b8d2bf, 0x15c1b79e, 0x46a52564, 0xf8d7e54e,
256 0x3e378160, 0x7895cda5, 0x859c15a5,
257 0xe6459788, 0xc37bc75f, 0xdb07ba0c, 0x0676a3ab, 0x7f229b1e,
258 0x31842e7b, 0x24259fd7, 0xf8bef472,
259 0x835ffcb8, 0x6df4c1f2, 0x96f5b195, 0xfd0af0fc, 0xb0fe134c,
260 0xe2506d3d, 0x4f9b12ea, 0xf215f225,
261 0xa223736f, 0x9fb4c428, 0x25d04979, 0x34c713f8, 0xc4618187,
262 0xea7a6e98, 0x7cd16efc, 0x1436876c,
263 0xf1544107, 0xbedeee14, 0x56e9af27, 0xa04aa441, 0x3cf7c899,
264 0x92ecbae6, 0xdd67016d, 0x151682eb,
265 0xa842eedf, 0xfdba60b4, 0xf1907b75, 0x20e3030f, 0x24d8c29e,
266 0xe139673b, 0xefa63fb8, 0x71873054,
267 0xb6f2cf3b, 0x9f326442, 0xcb15a4cc, 0xb01a4504, 0xf1e47d8d,
268 0x844a1be5, 0xbae7dfdc, 0x42cbda70,
269 0xcd7dae0a, 0x57e85b7a, 0xd53f5af6, 0x20cf4d8c, 0xcea4d428,
270 0x79d130a4, 0x3486ebfb, 0x33d3cddc,
271 0x77853b53, 0x37effcb5, 0xc5068778, 0xe580b3e6, 0x4e68b8f4,
272 0xc5c8b37e, 0x0d809ea2, 0x398feb7c,
273 0x132a4f94, 0x43b7950e, 0x2fee7d1c, 0x223613bd, 0xdd06caa2,
274 0x37df932b, 0xc4248289, 0xacf3ebc3,
275 0x5715f6b7, 0xef3478dd, 0xf267616f, 0xc148cbe4, 0x9052815e,
276 0x5e410fab, 0xb48a2465, 0x2eda7fa4,
277 0xe87b40e4, 0xe98ea084, 0x5889e9e1, 0xefd390fc, 0xdd07d35b,
278 0xdb485694, 0x38d7e5b2, 0x57720101,
279 0x730edebc, 0x5b643113, 0x94917e4f, 0x503c2fba, 0x646f1282,
280 0x7523d24a, 0xe0779695, 0xf9c17a8f,
281 0x7a5b2121, 0xd187b896, 0x29263a4d, 0xba510cdf, 0x81f47c9f,
282 0xad1163ed, 0xea7b5965, 0x1a00726e,
283 0x11403092, 0x00da6d77, 0x4a0cdd61, 0xad1f4603, 0x605bdfb0,
284 0x9eedc364, 0x22ebe6a8, 0xcee7d28a,
285 0xa0e736a0, 0x5564a6b9, 0x10853209, 0xc7eb8f37, 0x2de705ca,
286 0x8951570f, 0xdf09822b, 0xbd691a6c,
287 0xaa12e4f2, 0x87451c0f, 0xe0f6a27a, 0x3ada4819, 0x4cf1764f,
288 0x0d771c2b, 0x67cdb156, 0x350d8384,
289 0x5938fa0f, 0x42399ef3, 0x36997b07, 0x0e84093d, 0x4aa93e61,
290 0x8360d87b, 0x1fa98b0c, 0x1149382c,
291 0xe97625a5, 0x0614d1b7, 0x0e25244b, 0x0c768347, 0x589e8d82,
292 0x0d2059d1, 0xa466bb1e, 0xf8da0a82,
293 0x04f19130, 0xba6e4ec0, 0x99265164, 0x1ee7230d, 0x50b2ad80,
294 0xeaee6801, 0x8db2a283, 0xea8bf59e
295};
296
297#define s1 cast_s1
298#define s2 cast_s2
299#define s3 cast_s3
300#define s4 cast_s4
301
302#define F1(D, m, r) ((I = ((m) + (D))), (I = rol32(I, (r))), \
303 (((s1[I >> 24] ^ s2[(I>>16)&0xff]) - s3[(I>>8)&0xff]) + s4[I&0xff]))
304#define F2(D, m, r) ((I = ((m) ^ (D))), (I = rol32(I, (r))), \
305 (((s1[I >> 24] - s2[(I>>16)&0xff]) + s3[(I>>8)&0xff]) ^ s4[I&0xff]))
306#define F3(D, m, r) ((I = ((m) - (D))), (I = rol32(I, (r))), \
307 (((s1[I >> 24] + s2[(I>>16)&0xff]) ^ s3[(I>>8)&0xff]) - s4[I&0xff]))
308
309
310void __cast5_encrypt(struct cast5_ctx *c, u8 *outbuf, const u8 *inbuf)
311{
312 const __be32 *src = (const __be32 *)inbuf;
313 __be32 *dst = (__be32 *)outbuf;
314 u32 l, r, t;
315 u32 I; /* used by the Fx macros */
316 u32 *Km;
317 u8 *Kr;
318
319 Km = c->Km;
320 Kr = c->Kr;
321
322 /* (L0,R0) <-- (m1...m64). (Split the plaintext into left and
323 * right 32-bit halves L0 = m1...m32 and R0 = m33...m64.)
324 */
325 l = be32_to_cpu(src[0]);
326 r = be32_to_cpu(src[1]);
327
328 /* (16 rounds) for i from 1 to 16, compute Li and Ri as follows:
329 * Li = Ri-1;
330 * Ri = Li-1 ^ f(Ri-1,Kmi,Kri), where f is defined in Section 2.2
331 * Rounds 1, 4, 7, 10, 13, and 16 use f function Type 1.
332 * Rounds 2, 5, 8, 11, and 14 use f function Type 2.
333 * Rounds 3, 6, 9, 12, and 15 use f function Type 3.
334 */
335
336 t = l; l = r; r = t ^ F1(r, Km[0], Kr[0]);
337 t = l; l = r; r = t ^ F2(r, Km[1], Kr[1]);
338 t = l; l = r; r = t ^ F3(r, Km[2], Kr[2]);
339 t = l; l = r; r = t ^ F1(r, Km[3], Kr[3]);
340 t = l; l = r; r = t ^ F2(r, Km[4], Kr[4]);
341 t = l; l = r; r = t ^ F3(r, Km[5], Kr[5]);
342 t = l; l = r; r = t ^ F1(r, Km[6], Kr[6]);
343 t = l; l = r; r = t ^ F2(r, Km[7], Kr[7]);
344 t = l; l = r; r = t ^ F3(r, Km[8], Kr[8]);
345 t = l; l = r; r = t ^ F1(r, Km[9], Kr[9]);
346 t = l; l = r; r = t ^ F2(r, Km[10], Kr[10]);
347 t = l; l = r; r = t ^ F3(r, Km[11], Kr[11]);
348 if (!(c->rr)) {
349 t = l; l = r; r = t ^ F1(r, Km[12], Kr[12]);
350 t = l; l = r; r = t ^ F2(r, Km[13], Kr[13]);
351 t = l; l = r; r = t ^ F3(r, Km[14], Kr[14]);
352 t = l; l = r; r = t ^ F1(r, Km[15], Kr[15]);
353 }
354
355 /* c1...c64 <-- (R16,L16). (Exchange final blocks L16, R16 and
356 * concatenate to form the ciphertext.) */
357 dst[0] = cpu_to_be32(r);
358 dst[1] = cpu_to_be32(l);
359}
360EXPORT_SYMBOL_GPL(__cast5_encrypt);
361
362static void cast5_encrypt(struct crypto_tfm *tfm, u8 *outbuf, const u8 *inbuf)
363{
364 __cast5_encrypt(crypto_tfm_ctx(tfm), outbuf, inbuf);
365}
366
367void __cast5_decrypt(struct cast5_ctx *c, u8 *outbuf, const u8 *inbuf)
368{
369 const __be32 *src = (const __be32 *)inbuf;
370 __be32 *dst = (__be32 *)outbuf;
371 u32 l, r, t;
372 u32 I;
373 u32 *Km;
374 u8 *Kr;
375
376 Km = c->Km;
377 Kr = c->Kr;
378
379 l = be32_to_cpu(src[0]);
380 r = be32_to_cpu(src[1]);
381
382 if (!(c->rr)) {
383 t = l; l = r; r = t ^ F1(r, Km[15], Kr[15]);
384 t = l; l = r; r = t ^ F3(r, Km[14], Kr[14]);
385 t = l; l = r; r = t ^ F2(r, Km[13], Kr[13]);
386 t = l; l = r; r = t ^ F1(r, Km[12], Kr[12]);
387 }
388 t = l; l = r; r = t ^ F3(r, Km[11], Kr[11]);
389 t = l; l = r; r = t ^ F2(r, Km[10], Kr[10]);
390 t = l; l = r; r = t ^ F1(r, Km[9], Kr[9]);
391 t = l; l = r; r = t ^ F3(r, Km[8], Kr[8]);
392 t = l; l = r; r = t ^ F2(r, Km[7], Kr[7]);
393 t = l; l = r; r = t ^ F1(r, Km[6], Kr[6]);
394 t = l; l = r; r = t ^ F3(r, Km[5], Kr[5]);
395 t = l; l = r; r = t ^ F2(r, Km[4], Kr[4]);
396 t = l; l = r; r = t ^ F1(r, Km[3], Kr[3]);
397 t = l; l = r; r = t ^ F3(r, Km[2], Kr[2]);
398 t = l; l = r; r = t ^ F2(r, Km[1], Kr[1]);
399 t = l; l = r; r = t ^ F1(r, Km[0], Kr[0]);
400
401 dst[0] = cpu_to_be32(r);
402 dst[1] = cpu_to_be32(l);
403}
404EXPORT_SYMBOL_GPL(__cast5_decrypt);
405
406static void cast5_decrypt(struct crypto_tfm *tfm, u8 *outbuf, const u8 *inbuf)
407{
408 __cast5_decrypt(crypto_tfm_ctx(tfm), outbuf, inbuf);
409}
410
411static void key_schedule(u32 *x, u32 *z, u32 *k)
412{
413
414#define xi(i) ((x[(i)/4] >> (8*(3-((i)%4)))) & 0xff)
415#define zi(i) ((z[(i)/4] >> (8*(3-((i)%4)))) & 0xff)
416
417 z[0] = x[0] ^ s5[xi(13)] ^ s6[xi(15)] ^ s7[xi(12)] ^ sb8[xi(14)] ^
418 s7[xi(8)];
419 z[1] = x[2] ^ s5[zi(0)] ^ s6[zi(2)] ^ s7[zi(1)] ^ sb8[zi(3)] ^
420 sb8[xi(10)];
421 z[2] = x[3] ^ s5[zi(7)] ^ s6[zi(6)] ^ s7[zi(5)] ^ sb8[zi(4)] ^
422 s5[xi(9)];
423 z[3] = x[1] ^ s5[zi(10)] ^ s6[zi(9)] ^ s7[zi(11)] ^ sb8[zi(8)] ^
424 s6[xi(11)];
425 k[0] = s5[zi(8)] ^ s6[zi(9)] ^ s7[zi(7)] ^ sb8[zi(6)] ^ s5[zi(2)];
426 k[1] = s5[zi(10)] ^ s6[zi(11)] ^ s7[zi(5)] ^ sb8[zi(4)] ^
427 s6[zi(6)];
428 k[2] = s5[zi(12)] ^ s6[zi(13)] ^ s7[zi(3)] ^ sb8[zi(2)] ^
429 s7[zi(9)];
430 k[3] = s5[zi(14)] ^ s6[zi(15)] ^ s7[zi(1)] ^ sb8[zi(0)] ^
431 sb8[zi(12)];
432
433 x[0] = z[2] ^ s5[zi(5)] ^ s6[zi(7)] ^ s7[zi(4)] ^ sb8[zi(6)] ^
434 s7[zi(0)];
435 x[1] = z[0] ^ s5[xi(0)] ^ s6[xi(2)] ^ s7[xi(1)] ^ sb8[xi(3)] ^
436 sb8[zi(2)];
437 x[2] = z[1] ^ s5[xi(7)] ^ s6[xi(6)] ^ s7[xi(5)] ^ sb8[xi(4)] ^
438 s5[zi(1)];
439 x[3] = z[3] ^ s5[xi(10)] ^ s6[xi(9)] ^ s7[xi(11)] ^ sb8[xi(8)] ^
440 s6[zi(3)];
441 k[4] = s5[xi(3)] ^ s6[xi(2)] ^ s7[xi(12)] ^ sb8[xi(13)] ^
442 s5[xi(8)];
443 k[5] = s5[xi(1)] ^ s6[xi(0)] ^ s7[xi(14)] ^ sb8[xi(15)] ^
444 s6[xi(13)];
445 k[6] = s5[xi(7)] ^ s6[xi(6)] ^ s7[xi(8)] ^ sb8[xi(9)] ^ s7[xi(3)];
446 k[7] = s5[xi(5)] ^ s6[xi(4)] ^ s7[xi(10)] ^ sb8[xi(11)] ^
447 sb8[xi(7)];
448
449 z[0] = x[0] ^ s5[xi(13)] ^ s6[xi(15)] ^ s7[xi(12)] ^ sb8[xi(14)] ^
450 s7[xi(8)];
451 z[1] = x[2] ^ s5[zi(0)] ^ s6[zi(2)] ^ s7[zi(1)] ^ sb8[zi(3)] ^
452 sb8[xi(10)];
453 z[2] = x[3] ^ s5[zi(7)] ^ s6[zi(6)] ^ s7[zi(5)] ^ sb8[zi(4)] ^
454 s5[xi(9)];
455 z[3] = x[1] ^ s5[zi(10)] ^ s6[zi(9)] ^ s7[zi(11)] ^ sb8[zi(8)] ^
456 s6[xi(11)];
457 k[8] = s5[zi(3)] ^ s6[zi(2)] ^ s7[zi(12)] ^ sb8[zi(13)] ^
458 s5[zi(9)];
459 k[9] = s5[zi(1)] ^ s6[zi(0)] ^ s7[zi(14)] ^ sb8[zi(15)] ^
460 s6[zi(12)];
461 k[10] = s5[zi(7)] ^ s6[zi(6)] ^ s7[zi(8)] ^ sb8[zi(9)] ^ s7[zi(2)];
462 k[11] = s5[zi(5)] ^ s6[zi(4)] ^ s7[zi(10)] ^ sb8[zi(11)] ^
463 sb8[zi(6)];
464
465 x[0] = z[2] ^ s5[zi(5)] ^ s6[zi(7)] ^ s7[zi(4)] ^ sb8[zi(6)] ^
466 s7[zi(0)];
467 x[1] = z[0] ^ s5[xi(0)] ^ s6[xi(2)] ^ s7[xi(1)] ^ sb8[xi(3)] ^
468 sb8[zi(2)];
469 x[2] = z[1] ^ s5[xi(7)] ^ s6[xi(6)] ^ s7[xi(5)] ^ sb8[xi(4)] ^
470 s5[zi(1)];
471 x[3] = z[3] ^ s5[xi(10)] ^ s6[xi(9)] ^ s7[xi(11)] ^ sb8[xi(8)] ^
472 s6[zi(3)];
473 k[12] = s5[xi(8)] ^ s6[xi(9)] ^ s7[xi(7)] ^ sb8[xi(6)] ^ s5[xi(3)];
474 k[13] = s5[xi(10)] ^ s6[xi(11)] ^ s7[xi(5)] ^ sb8[xi(4)] ^
475 s6[xi(7)];
476 k[14] = s5[xi(12)] ^ s6[xi(13)] ^ s7[xi(3)] ^ sb8[xi(2)] ^
477 s7[xi(8)];
478 k[15] = s5[xi(14)] ^ s6[xi(15)] ^ s7[xi(1)] ^ sb8[xi(0)] ^
479 sb8[xi(13)];
480
481#undef xi
482#undef zi
483}
484
485
486int cast5_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int key_len)
487{
488 struct cast5_ctx *c = crypto_tfm_ctx(tfm);
489 int i;
490 u32 x[4];
491 u32 z[4];
492 u32 k[16];
493 __be32 p_key[4];
494
495 c->rr = key_len <= 10 ? 1 : 0;
496
497 memset(p_key, 0, 16);
498 memcpy(p_key, key, key_len);
499
500
501 x[0] = be32_to_cpu(p_key[0]);
502 x[1] = be32_to_cpu(p_key[1]);
503 x[2] = be32_to_cpu(p_key[2]);
504 x[3] = be32_to_cpu(p_key[3]);
505
506 key_schedule(x, z, k);
507 for (i = 0; i < 16; i++)
508 c->Km[i] = k[i];
509 key_schedule(x, z, k);
510 for (i = 0; i < 16; i++)
511 c->Kr[i] = k[i] & 0x1f;
512 return 0;
513}
514EXPORT_SYMBOL_GPL(cast5_setkey);
515
516static struct crypto_alg alg = {
517 .cra_name = "cast5",
518 .cra_driver_name = "cast5-generic",
519 .cra_priority = 100,
520 .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
521 .cra_blocksize = CAST5_BLOCK_SIZE,
522 .cra_ctxsize = sizeof(struct cast5_ctx),
523 .cra_alignmask = 3,
524 .cra_module = THIS_MODULE,
525 .cra_u = {
526 .cipher = {
527 .cia_min_keysize = CAST5_MIN_KEY_SIZE,
528 .cia_max_keysize = CAST5_MAX_KEY_SIZE,
529 .cia_setkey = cast5_setkey,
530 .cia_encrypt = cast5_encrypt,
531 .cia_decrypt = cast5_decrypt
532 }
533 }
534};
535
536static int __init cast5_mod_init(void)
537{
538 return crypto_register_alg(&alg);
539}
540
541static void __exit cast5_mod_fini(void)
542{
543 crypto_unregister_alg(&alg);
544}
545
546module_init(cast5_mod_init);
547module_exit(cast5_mod_fini);
548
549MODULE_LICENSE("GPL");
550MODULE_DESCRIPTION("Cast5 Cipher Algorithm");
551MODULE_ALIAS_CRYPTO("cast5");
552MODULE_ALIAS_CRYPTO("cast5-generic");
553