1/*
2 * Cryptographic API.
3 *
4 * Common Blowfish algorithm parts shared between the c and assembler
5 * implementations.
6 *
7 * Blowfish Cipher Algorithm, by Bruce Schneier.
8 * http://www.counterpane.com/blowfish.html
9 *
10 * Adapted from Kerneli implementation.
11 *
12 * Copyright (c) Herbert Valerio Riedel <hvr@hvrlab.org>
13 * Copyright (c) Kyle McMartin <kyle@debian.org>
14 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
15 *
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
20 *
21 */
22#include <linux/init.h>
23#include <linux/module.h>
24#include <linux/mm.h>
25#include <asm/byteorder.h>
26#include <linux/crypto.h>
27#include <linux/types.h>
28#include <crypto/blowfish.h>
29
30static const u32 bf_pbox[16 + 2] = {
31 0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344,
32 0xa4093822, 0x299f31d0, 0x082efa98, 0xec4e6c89,
33 0x452821e6, 0x38d01377, 0xbe5466cf, 0x34e90c6c,
34 0xc0ac29b7, 0xc97c50dd, 0x3f84d5b5, 0xb5470917,
35 0x9216d5d9, 0x8979fb1b,
36};
37
38static const u32 bf_sbox[256 * 4] = {
39 0xd1310ba6, 0x98dfb5ac, 0x2ffd72db, 0xd01adfb7,
40 0xb8e1afed, 0x6a267e96, 0xba7c9045, 0xf12c7f99,
41 0x24a19947, 0xb3916cf7, 0x0801f2e2, 0x858efc16,
42 0x636920d8, 0x71574e69, 0xa458fea3, 0xf4933d7e,
43 0x0d95748f, 0x728eb658, 0x718bcd58, 0x82154aee,
44 0x7b54a41d, 0xc25a59b5, 0x9c30d539, 0x2af26013,
45 0xc5d1b023, 0x286085f0, 0xca417918, 0xb8db38ef,
46 0x8e79dcb0, 0x603a180e, 0x6c9e0e8b, 0xb01e8a3e,
47 0xd71577c1, 0xbd314b27, 0x78af2fda, 0x55605c60,
48 0xe65525f3, 0xaa55ab94, 0x57489862, 0x63e81440,
49 0x55ca396a, 0x2aab10b6, 0xb4cc5c34, 0x1141e8ce,
50 0xa15486af, 0x7c72e993, 0xb3ee1411, 0x636fbc2a,
51 0x2ba9c55d, 0x741831f6, 0xce5c3e16, 0x9b87931e,
52 0xafd6ba33, 0x6c24cf5c, 0x7a325381, 0x28958677,
53 0x3b8f4898, 0x6b4bb9af, 0xc4bfe81b, 0x66282193,
54 0x61d809cc, 0xfb21a991, 0x487cac60, 0x5dec8032,
55 0xef845d5d, 0xe98575b1, 0xdc262302, 0xeb651b88,
56 0x23893e81, 0xd396acc5, 0x0f6d6ff3, 0x83f44239,
57 0x2e0b4482, 0xa4842004, 0x69c8f04a, 0x9e1f9b5e,
58 0x21c66842, 0xf6e96c9a, 0x670c9c61, 0xabd388f0,
59 0x6a51a0d2, 0xd8542f68, 0x960fa728, 0xab5133a3,
60 0x6eef0b6c, 0x137a3be4, 0xba3bf050, 0x7efb2a98,
61 0xa1f1651d, 0x39af0176, 0x66ca593e, 0x82430e88,
62 0x8cee8619, 0x456f9fb4, 0x7d84a5c3, 0x3b8b5ebe,
63 0xe06f75d8, 0x85c12073, 0x401a449f, 0x56c16aa6,
64 0x4ed3aa62, 0x363f7706, 0x1bfedf72, 0x429b023d,
65 0x37d0d724, 0xd00a1248, 0xdb0fead3, 0x49f1c09b,
66 0x075372c9, 0x80991b7b, 0x25d479d8, 0xf6e8def7,
67 0xe3fe501a, 0xb6794c3b, 0x976ce0bd, 0x04c006ba,
68 0xc1a94fb6, 0x409f60c4, 0x5e5c9ec2, 0x196a2463,
69 0x68fb6faf, 0x3e6c53b5, 0x1339b2eb, 0x3b52ec6f,
70 0x6dfc511f, 0x9b30952c, 0xcc814544, 0xaf5ebd09,
71 0xbee3d004, 0xde334afd, 0x660f2807, 0x192e4bb3,
72 0xc0cba857, 0x45c8740f, 0xd20b5f39, 0xb9d3fbdb,
73 0x5579c0bd, 0x1a60320a, 0xd6a100c6, 0x402c7279,
74 0x679f25fe, 0xfb1fa3cc, 0x8ea5e9f8, 0xdb3222f8,
75 0x3c7516df, 0xfd616b15, 0x2f501ec8, 0xad0552ab,
76 0x323db5fa, 0xfd238760, 0x53317b48, 0x3e00df82,
77 0x9e5c57bb, 0xca6f8ca0, 0x1a87562e, 0xdf1769db,
78 0xd542a8f6, 0x287effc3, 0xac6732c6, 0x8c4f5573,
79 0x695b27b0, 0xbbca58c8, 0xe1ffa35d, 0xb8f011a0,
80 0x10fa3d98, 0xfd2183b8, 0x4afcb56c, 0x2dd1d35b,
81 0x9a53e479, 0xb6f84565, 0xd28e49bc, 0x4bfb9790,
82 0xe1ddf2da, 0xa4cb7e33, 0x62fb1341, 0xcee4c6e8,
83 0xef20cada, 0x36774c01, 0xd07e9efe, 0x2bf11fb4,
84 0x95dbda4d, 0xae909198, 0xeaad8e71, 0x6b93d5a0,
85 0xd08ed1d0, 0xafc725e0, 0x8e3c5b2f, 0x8e7594b7,
86 0x8ff6e2fb, 0xf2122b64, 0x8888b812, 0x900df01c,
87 0x4fad5ea0, 0x688fc31c, 0xd1cff191, 0xb3a8c1ad,
88 0x2f2f2218, 0xbe0e1777, 0xea752dfe, 0x8b021fa1,
89 0xe5a0cc0f, 0xb56f74e8, 0x18acf3d6, 0xce89e299,
90 0xb4a84fe0, 0xfd13e0b7, 0x7cc43b81, 0xd2ada8d9,
91 0x165fa266, 0x80957705, 0x93cc7314, 0x211a1477,
92 0xe6ad2065, 0x77b5fa86, 0xc75442f5, 0xfb9d35cf,
93 0xebcdaf0c, 0x7b3e89a0, 0xd6411bd3, 0xae1e7e49,
94 0x00250e2d, 0x2071b35e, 0x226800bb, 0x57b8e0af,
95 0x2464369b, 0xf009b91e, 0x5563911d, 0x59dfa6aa,
96 0x78c14389, 0xd95a537f, 0x207d5ba2, 0x02e5b9c5,
97 0x83260376, 0x6295cfa9, 0x11c81968, 0x4e734a41,
98 0xb3472dca, 0x7b14a94a, 0x1b510052, 0x9a532915,
99 0xd60f573f, 0xbc9bc6e4, 0x2b60a476, 0x81e67400,
100 0x08ba6fb5, 0x571be91f, 0xf296ec6b, 0x2a0dd915,
101 0xb6636521, 0xe7b9f9b6, 0xff34052e, 0xc5855664,
102 0x53b02d5d, 0xa99f8fa1, 0x08ba4799, 0x6e85076a,
103 0x4b7a70e9, 0xb5b32944, 0xdb75092e, 0xc4192623,
104 0xad6ea6b0, 0x49a7df7d, 0x9cee60b8, 0x8fedb266,
105 0xecaa8c71, 0x699a17ff, 0x5664526c, 0xc2b19ee1,
106 0x193602a5, 0x75094c29, 0xa0591340, 0xe4183a3e,
107 0x3f54989a, 0x5b429d65, 0x6b8fe4d6, 0x99f73fd6,
108 0xa1d29c07, 0xefe830f5, 0x4d2d38e6, 0xf0255dc1,
109 0x4cdd2086, 0x8470eb26, 0x6382e9c6, 0x021ecc5e,
110 0x09686b3f, 0x3ebaefc9, 0x3c971814, 0x6b6a70a1,
111 0x687f3584, 0x52a0e286, 0xb79c5305, 0xaa500737,
112 0x3e07841c, 0x7fdeae5c, 0x8e7d44ec, 0x5716f2b8,
113 0xb03ada37, 0xf0500c0d, 0xf01c1f04, 0x0200b3ff,
114 0xae0cf51a, 0x3cb574b2, 0x25837a58, 0xdc0921bd,
115 0xd19113f9, 0x7ca92ff6, 0x94324773, 0x22f54701,
116 0x3ae5e581, 0x37c2dadc, 0xc8b57634, 0x9af3dda7,
117 0xa9446146, 0x0fd0030e, 0xecc8c73e, 0xa4751e41,
118 0xe238cd99, 0x3bea0e2f, 0x3280bba1, 0x183eb331,
119 0x4e548b38, 0x4f6db908, 0x6f420d03, 0xf60a04bf,
120 0x2cb81290, 0x24977c79, 0x5679b072, 0xbcaf89af,
121 0xde9a771f, 0xd9930810, 0xb38bae12, 0xdccf3f2e,
122 0x5512721f, 0x2e6b7124, 0x501adde6, 0x9f84cd87,
123 0x7a584718, 0x7408da17, 0xbc9f9abc, 0xe94b7d8c,
124 0xec7aec3a, 0xdb851dfa, 0x63094366, 0xc464c3d2,
125 0xef1c1847, 0x3215d908, 0xdd433b37, 0x24c2ba16,
126 0x12a14d43, 0x2a65c451, 0x50940002, 0x133ae4dd,
127 0x71dff89e, 0x10314e55, 0x81ac77d6, 0x5f11199b,
128 0x043556f1, 0xd7a3c76b, 0x3c11183b, 0x5924a509,
129 0xf28fe6ed, 0x97f1fbfa, 0x9ebabf2c, 0x1e153c6e,
130 0x86e34570, 0xeae96fb1, 0x860e5e0a, 0x5a3e2ab3,
131 0x771fe71c, 0x4e3d06fa, 0x2965dcb9, 0x99e71d0f,
132 0x803e89d6, 0x5266c825, 0x2e4cc978, 0x9c10b36a,
133 0xc6150eba, 0x94e2ea78, 0xa5fc3c53, 0x1e0a2df4,
134 0xf2f74ea7, 0x361d2b3d, 0x1939260f, 0x19c27960,
135 0x5223a708, 0xf71312b6, 0xebadfe6e, 0xeac31f66,
136 0xe3bc4595, 0xa67bc883, 0xb17f37d1, 0x018cff28,
137 0xc332ddef, 0xbe6c5aa5, 0x65582185, 0x68ab9802,
138 0xeecea50f, 0xdb2f953b, 0x2aef7dad, 0x5b6e2f84,
139 0x1521b628, 0x29076170, 0xecdd4775, 0x619f1510,
140 0x13cca830, 0xeb61bd96, 0x0334fe1e, 0xaa0363cf,
141 0xb5735c90, 0x4c70a239, 0xd59e9e0b, 0xcbaade14,
142 0xeecc86bc, 0x60622ca7, 0x9cab5cab, 0xb2f3846e,
143 0x648b1eaf, 0x19bdf0ca, 0xa02369b9, 0x655abb50,
144 0x40685a32, 0x3c2ab4b3, 0x319ee9d5, 0xc021b8f7,
145 0x9b540b19, 0x875fa099, 0x95f7997e, 0x623d7da8,
146 0xf837889a, 0x97e32d77, 0x11ed935f, 0x16681281,
147 0x0e358829, 0xc7e61fd6, 0x96dedfa1, 0x7858ba99,
148 0x57f584a5, 0x1b227263, 0x9b83c3ff, 0x1ac24696,
149 0xcdb30aeb, 0x532e3054, 0x8fd948e4, 0x6dbc3128,
150 0x58ebf2ef, 0x34c6ffea, 0xfe28ed61, 0xee7c3c73,
151 0x5d4a14d9, 0xe864b7e3, 0x42105d14, 0x203e13e0,
152 0x45eee2b6, 0xa3aaabea, 0xdb6c4f15, 0xfacb4fd0,
153 0xc742f442, 0xef6abbb5, 0x654f3b1d, 0x41cd2105,
154 0xd81e799e, 0x86854dc7, 0xe44b476a, 0x3d816250,
155 0xcf62a1f2, 0x5b8d2646, 0xfc8883a0, 0xc1c7b6a3,
156 0x7f1524c3, 0x69cb7492, 0x47848a0b, 0x5692b285,
157 0x095bbf00, 0xad19489d, 0x1462b174, 0x23820e00,
158 0x58428d2a, 0x0c55f5ea, 0x1dadf43e, 0x233f7061,
159 0x3372f092, 0x8d937e41, 0xd65fecf1, 0x6c223bdb,
160 0x7cde3759, 0xcbee7460, 0x4085f2a7, 0xce77326e,
161 0xa6078084, 0x19f8509e, 0xe8efd855, 0x61d99735,
162 0xa969a7aa, 0xc50c06c2, 0x5a04abfc, 0x800bcadc,
163 0x9e447a2e, 0xc3453484, 0xfdd56705, 0x0e1e9ec9,
164 0xdb73dbd3, 0x105588cd, 0x675fda79, 0xe3674340,
165 0xc5c43465, 0x713e38d8, 0x3d28f89e, 0xf16dff20,
166 0x153e21e7, 0x8fb03d4a, 0xe6e39f2b, 0xdb83adf7,
167 0xe93d5a68, 0x948140f7, 0xf64c261c, 0x94692934,
168 0x411520f7, 0x7602d4f7, 0xbcf46b2e, 0xd4a20068,
169 0xd4082471, 0x3320f46a, 0x43b7d4b7, 0x500061af,
170 0x1e39f62e, 0x97244546, 0x14214f74, 0xbf8b8840,
171 0x4d95fc1d, 0x96b591af, 0x70f4ddd3, 0x66a02f45,
172 0xbfbc09ec, 0x03bd9785, 0x7fac6dd0, 0x31cb8504,
173 0x96eb27b3, 0x55fd3941, 0xda2547e6, 0xabca0a9a,
174 0x28507825, 0x530429f4, 0x0a2c86da, 0xe9b66dfb,
175 0x68dc1462, 0xd7486900, 0x680ec0a4, 0x27a18dee,
176 0x4f3ffea2, 0xe887ad8c, 0xb58ce006, 0x7af4d6b6,
177 0xaace1e7c, 0xd3375fec, 0xce78a399, 0x406b2a42,
178 0x20fe9e35, 0xd9f385b9, 0xee39d7ab, 0x3b124e8b,
179 0x1dc9faf7, 0x4b6d1856, 0x26a36631, 0xeae397b2,
180 0x3a6efa74, 0xdd5b4332, 0x6841e7f7, 0xca7820fb,
181 0xfb0af54e, 0xd8feb397, 0x454056ac, 0xba489527,
182 0x55533a3a, 0x20838d87, 0xfe6ba9b7, 0xd096954b,
183 0x55a867bc, 0xa1159a58, 0xcca92963, 0x99e1db33,
184 0xa62a4a56, 0x3f3125f9, 0x5ef47e1c, 0x9029317c,
185 0xfdf8e802, 0x04272f70, 0x80bb155c, 0x05282ce3,
186 0x95c11548, 0xe4c66d22, 0x48c1133f, 0xc70f86dc,
187 0x07f9c9ee, 0x41041f0f, 0x404779a4, 0x5d886e17,
188 0x325f51eb, 0xd59bc0d1, 0xf2bcc18f, 0x41113564,
189 0x257b7834, 0x602a9c60, 0xdff8e8a3, 0x1f636c1b,
190 0x0e12b4c2, 0x02e1329e, 0xaf664fd1, 0xcad18115,
191 0x6b2395e0, 0x333e92e1, 0x3b240b62, 0xeebeb922,
192 0x85b2a20e, 0xe6ba0d99, 0xde720c8c, 0x2da2f728,
193 0xd0127845, 0x95b794fd, 0x647d0862, 0xe7ccf5f0,
194 0x5449a36f, 0x877d48fa, 0xc39dfd27, 0xf33e8d1e,
195 0x0a476341, 0x992eff74, 0x3a6f6eab, 0xf4f8fd37,
196 0xa812dc60, 0xa1ebddf8, 0x991be14c, 0xdb6e6b0d,
197 0xc67b5510, 0x6d672c37, 0x2765d43b, 0xdcd0e804,
198 0xf1290dc7, 0xcc00ffa3, 0xb5390f92, 0x690fed0b,
199 0x667b9ffb, 0xcedb7d9c, 0xa091cf0b, 0xd9155ea3,
200 0xbb132f88, 0x515bad24, 0x7b9479bf, 0x763bd6eb,
201 0x37392eb3, 0xcc115979, 0x8026e297, 0xf42e312d,
202 0x6842ada7, 0xc66a2b3b, 0x12754ccc, 0x782ef11c,
203 0x6a124237, 0xb79251e7, 0x06a1bbe6, 0x4bfb6350,
204 0x1a6b1018, 0x11caedfa, 0x3d25bdd8, 0xe2e1c3c9,
205 0x44421659, 0x0a121386, 0xd90cec6e, 0xd5abea2a,
206 0x64af674e, 0xda86a85f, 0xbebfe988, 0x64e4c3fe,
207 0x9dbc8057, 0xf0f7c086, 0x60787bf8, 0x6003604d,
208 0xd1fd8346, 0xf6381fb0, 0x7745ae04, 0xd736fccc,
209 0x83426b33, 0xf01eab71, 0xb0804187, 0x3c005e5f,
210 0x77a057be, 0xbde8ae24, 0x55464299, 0xbf582e61,
211 0x4e58f48f, 0xf2ddfda2, 0xf474ef38, 0x8789bdc2,
212 0x5366f9c3, 0xc8b38e74, 0xb475f255, 0x46fcd9b9,
213 0x7aeb2661, 0x8b1ddf84, 0x846a0e79, 0x915f95e2,
214 0x466e598e, 0x20b45770, 0x8cd55591, 0xc902de4c,
215 0xb90bace1, 0xbb8205d0, 0x11a86248, 0x7574a99e,
216 0xb77f19b6, 0xe0a9dc09, 0x662d09a1, 0xc4324633,
217 0xe85a1f02, 0x09f0be8c, 0x4a99a025, 0x1d6efe10,
218 0x1ab93d1d, 0x0ba5a4df, 0xa186f20f, 0x2868f169,
219 0xdcb7da83, 0x573906fe, 0xa1e2ce9b, 0x4fcd7f52,
220 0x50115e01, 0xa70683fa, 0xa002b5c4, 0x0de6d027,
221 0x9af88c27, 0x773f8641, 0xc3604c06, 0x61a806b5,
222 0xf0177a28, 0xc0f586e0, 0x006058aa, 0x30dc7d62,
223 0x11e69ed7, 0x2338ea63, 0x53c2dd94, 0xc2c21634,
224 0xbbcbee56, 0x90bcb6de, 0xebfc7da1, 0xce591d76,
225 0x6f05e409, 0x4b7c0188, 0x39720a3d, 0x7c927c24,
226 0x86e3725f, 0x724d9db9, 0x1ac15bb4, 0xd39eb8fc,
227 0xed545578, 0x08fca5b5, 0xd83d7cd3, 0x4dad0fc4,
228 0x1e50ef5e, 0xb161e6f8, 0xa28514d9, 0x6c51133c,
229 0x6fd5c7e7, 0x56e14ec4, 0x362abfce, 0xddc6c837,
230 0xd79a3234, 0x92638212, 0x670efa8e, 0x406000e0,
231 0x3a39ce37, 0xd3faf5cf, 0xabc27737, 0x5ac52d1b,
232 0x5cb0679e, 0x4fa33742, 0xd3822740, 0x99bc9bbe,
233 0xd5118e9d, 0xbf0f7315, 0xd62d1c7e, 0xc700c47b,
234 0xb78c1b6b, 0x21a19045, 0xb26eb1be, 0x6a366eb4,
235 0x5748ab2f, 0xbc946e79, 0xc6a376d2, 0x6549c2c8,
236 0x530ff8ee, 0x468dde7d, 0xd5730a1d, 0x4cd04dc6,
237 0x2939bbdb, 0xa9ba4650, 0xac9526e8, 0xbe5ee304,
238 0xa1fad5f0, 0x6a2d519a, 0x63ef8ce2, 0x9a86ee22,
239 0xc089c2b8, 0x43242ef6, 0xa51e03aa, 0x9cf2d0a4,
240 0x83c061ba, 0x9be96a4d, 0x8fe51550, 0xba645bd6,
241 0x2826a2f9, 0xa73a3ae1, 0x4ba99586, 0xef5562e9,
242 0xc72fefd3, 0xf752f7da, 0x3f046f69, 0x77fa0a59,
243 0x80e4a915, 0x87b08601, 0x9b09e6ad, 0x3b3ee593,
244 0xe990fd5a, 0x9e34d797, 0x2cf0b7d9, 0x022b8b51,
245 0x96d5ac3a, 0x017da67d, 0xd1cf3ed6, 0x7c7d2d28,
246 0x1f9f25cf, 0xadf2b89b, 0x5ad6b472, 0x5a88f54c,
247 0xe029ac71, 0xe019a5e6, 0x47b0acfd, 0xed93fa9b,
248 0xe8d3c48d, 0x283b57cc, 0xf8d56629, 0x79132e28,
249 0x785f0191, 0xed756055, 0xf7960e44, 0xe3d35e8c,
250 0x15056dd4, 0x88f46dba, 0x03a16125, 0x0564f0bd,
251 0xc3eb9e15, 0x3c9057a2, 0x97271aec, 0xa93a072a,
252 0x1b3f6d9b, 0x1e6321f5, 0xf59c66fb, 0x26dcf319,
253 0x7533d928, 0xb155fdf5, 0x03563482, 0x8aba3cbb,
254 0x28517711, 0xc20ad9f8, 0xabcc5167, 0xccad925f,
255 0x4de81751, 0x3830dc8e, 0x379d5862, 0x9320f991,
256 0xea7a90c2, 0xfb3e7bce, 0x5121ce64, 0x774fbe32,
257 0xa8b6e37e, 0xc3293d46, 0x48de5369, 0x6413e680,
258 0xa2ae0810, 0xdd6db224, 0x69852dfd, 0x09072166,
259 0xb39a460a, 0x6445c0dd, 0x586cdecf, 0x1c20c8ae,
260 0x5bbef7dd, 0x1b588d40, 0xccd2017f, 0x6bb4e3bb,
261 0xdda26a7e, 0x3a59ff45, 0x3e350a44, 0xbcb4cdd5,
262 0x72eacea8, 0xfa6484bb, 0x8d6612ae, 0xbf3c6f47,
263 0xd29be463, 0x542f5d9e, 0xaec2771b, 0xf64e6370,
264 0x740e0d8d, 0xe75b1357, 0xf8721671, 0xaf537d5d,
265 0x4040cb08, 0x4eb4e2cc, 0x34d2466a, 0x0115af84,
266 0xe1b00428, 0x95983a1d, 0x06b89fb4, 0xce6ea048,
267 0x6f3f3b82, 0x3520ab82, 0x011a1d4b, 0x277227f8,
268 0x611560b1, 0xe7933fdc, 0xbb3a792b, 0x344525bd,
269 0xa08839e1, 0x51ce794b, 0x2f32c9b7, 0xa01fbac9,
270 0xe01cc87e, 0xbcc7d1f6, 0xcf0111c3, 0xa1e8aac7,
271 0x1a908749, 0xd44fbd9a, 0xd0dadecb, 0xd50ada38,
272 0x0339c32a, 0xc6913667, 0x8df9317c, 0xe0b12b4f,
273 0xf79e59b7, 0x43f5bb3a, 0xf2d519ff, 0x27d9459c,
274 0xbf97222c, 0x15e6fc2a, 0x0f91fc71, 0x9b941525,
275 0xfae59361, 0xceb69ceb, 0xc2a86459, 0x12baa8d1,
276 0xb6c1075e, 0xe3056a0c, 0x10d25065, 0xcb03a442,
277 0xe0ec6e0e, 0x1698db3b, 0x4c98a0be, 0x3278e964,
278 0x9f1f9532, 0xe0d392df, 0xd3a0342b, 0x8971f21e,
279 0x1b0a7441, 0x4ba3348c, 0xc5be7120, 0xc37632d8,
280 0xdf359f8d, 0x9b992f2e, 0xe60b6f47, 0x0fe3f11d,
281 0xe54cda54, 0x1edad891, 0xce6279cf, 0xcd3e7e6f,
282 0x1618b166, 0xfd2c1d05, 0x848fd2c5, 0xf6fb2299,
283 0xf523f357, 0xa6327623, 0x93a83531, 0x56cccd02,
284 0xacf08162, 0x5a75ebb5, 0x6e163697, 0x88d273cc,
285 0xde966292, 0x81b949d0, 0x4c50901b, 0x71c65614,
286 0xe6c6c7bd, 0x327a140a, 0x45e1d006, 0xc3f27b9a,
287 0xc9aa53fd, 0x62a80f00, 0xbb25bfe2, 0x35bdd2f6,
288 0x71126905, 0xb2040222, 0xb6cbcf7c, 0xcd769c2b,
289 0x53113ec0, 0x1640e3d3, 0x38abbd60, 0x2547adf0,
290 0xba38209c, 0xf746ce76, 0x77afa1c5, 0x20756060,
291 0x85cbfe4e, 0x8ae88dd8, 0x7aaaf9b0, 0x4cf9aa7e,
292 0x1948c25c, 0x02fb8a8c, 0x01c36ae4, 0xd6ebe1f9,
293 0x90d4f869, 0xa65cdea0, 0x3f09252d, 0xc208e69f,
294 0xb74e6132, 0xce77e25b, 0x578fdfe3, 0x3ac372e6,
295};
296
297/*
298 * Round loop unrolling macros, S is a pointer to a S-Box array
299 * organized in 4 unsigned longs at a row.
300 */
301#define GET32_3(x) (((x) & 0xff))
302#define GET32_2(x) (((x) >> (8)) & (0xff))
303#define GET32_1(x) (((x) >> (16)) & (0xff))
304#define GET32_0(x) (((x) >> (24)) & (0xff))
305
306#define bf_F(x) (((S[GET32_0(x)] + S[256 + GET32_1(x)]) ^ \
307 S[512 + GET32_2(x)]) + S[768 + GET32_3(x)])
308
309#define ROUND(a, b, n) ({ b ^= P[n]; a ^= bf_F(b); })
310
311/*
312 * The blowfish encipher, processes 64-bit blocks.
313 * NOTE: This function MUSTN'T respect endianess
314 */
315static void encrypt_block(struct bf_ctx *bctx, u32 *dst, u32 *src)
316{
317 const u32 *P = bctx->p;
318 const u32 *S = bctx->s;
319 u32 yl = src[0];
320 u32 yr = src[1];
321
322 ROUND(yr, yl, 0);
323 ROUND(yl, yr, 1);
324 ROUND(yr, yl, 2);
325 ROUND(yl, yr, 3);
326 ROUND(yr, yl, 4);
327 ROUND(yl, yr, 5);
328 ROUND(yr, yl, 6);
329 ROUND(yl, yr, 7);
330 ROUND(yr, yl, 8);
331 ROUND(yl, yr, 9);
332 ROUND(yr, yl, 10);
333 ROUND(yl, yr, 11);
334 ROUND(yr, yl, 12);
335 ROUND(yl, yr, 13);
336 ROUND(yr, yl, 14);
337 ROUND(yl, yr, 15);
338
339 yl ^= P[16];
340 yr ^= P[17];
341
342 dst[0] = yr;
343 dst[1] = yl;
344}
345
346/*
347 * Calculates the blowfish S and P boxes for encryption and decryption.
348 */
349int blowfish_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen)
350{
351 struct bf_ctx *ctx = crypto_tfm_ctx(tfm);
352 u32 *P = ctx->p;
353 u32 *S = ctx->s;
354 short i, j, count;
355 u32 data[2], temp;
356
357 /* Copy the initialization s-boxes */
358 for (i = 0, count = 0; i < 256; i++)
359 for (j = 0; j < 4; j++, count++)
360 S[count] = bf_sbox[count];
361
362 /* Set the p-boxes */
363 for (i = 0; i < 16 + 2; i++)
364 P[i] = bf_pbox[i];
365
366 /* Actual subkey generation */
367 for (j = 0, i = 0; i < 16 + 2; i++) {
368 temp = (((u32)key[j] << 24) |
369 ((u32)key[(j + 1) % keylen] << 16) |
370 ((u32)key[(j + 2) % keylen] << 8) |
371 ((u32)key[(j + 3) % keylen]));
372
373 P[i] = P[i] ^ temp;
374 j = (j + 4) % keylen;
375 }
376
377 data[0] = 0x00000000;
378 data[1] = 0x00000000;
379
380 for (i = 0; i < 16 + 2; i += 2) {
381 encrypt_block((struct bf_ctx *)ctx, data, data);
382
383 P[i] = data[0];
384 P[i + 1] = data[1];
385 }
386
387 for (i = 0; i < 4; i++) {
388 for (j = 0, count = i * 256; j < 256; j += 2, count += 2) {
389 encrypt_block((struct bf_ctx *)ctx, data, data);
390
391 S[count] = data[0];
392 S[count + 1] = data[1];
393 }
394 }
395
396 /* Bruce says not to bother with the weak key check. */
397 return 0;
398}
399EXPORT_SYMBOL_GPL(blowfish_setkey);
400
401MODULE_LICENSE("GPL");
402MODULE_DESCRIPTION("Blowfish Cipher common functions");
403