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19#include <linux/init.h>
20#include <linux/module.h>
21#include <linux/mm.h>
22#include <asm/byteorder.h>
23#include <linux/crypto.h>
24#include <linux/types.h>
25
26#define BF_BLOCK_SIZE 8
27#define BF_MIN_KEY_SIZE 4
28#define BF_MAX_KEY_SIZE 56
29
30struct bf_ctx {
31 u32 p[18];
32 u32 s[1024];
33};
34
35static const u32 bf_pbox[16 + 2] = {
36 0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344,
37 0xa4093822, 0x299f31d0, 0x082efa98, 0xec4e6c89,
38 0x452821e6, 0x38d01377, 0xbe5466cf, 0x34e90c6c,
39 0xc0ac29b7, 0xc97c50dd, 0x3f84d5b5, 0xb5470917,
40 0x9216d5d9, 0x8979fb1b,
41};
42
43static const u32 bf_sbox[256 * 4] = {
44 0xd1310ba6, 0x98dfb5ac, 0x2ffd72db, 0xd01adfb7,
45 0xb8e1afed, 0x6a267e96, 0xba7c9045, 0xf12c7f99,
46 0x24a19947, 0xb3916cf7, 0x0801f2e2, 0x858efc16,
47 0x636920d8, 0x71574e69, 0xa458fea3, 0xf4933d7e,
48 0x0d95748f, 0x728eb658, 0x718bcd58, 0x82154aee,
49 0x7b54a41d, 0xc25a59b5, 0x9c30d539, 0x2af26013,
50 0xc5d1b023, 0x286085f0, 0xca417918, 0xb8db38ef,
51 0x8e79dcb0, 0x603a180e, 0x6c9e0e8b, 0xb01e8a3e,
52 0xd71577c1, 0xbd314b27, 0x78af2fda, 0x55605c60,
53 0xe65525f3, 0xaa55ab94, 0x57489862, 0x63e81440,
54 0x55ca396a, 0x2aab10b6, 0xb4cc5c34, 0x1141e8ce,
55 0xa15486af, 0x7c72e993, 0xb3ee1411, 0x636fbc2a,
56 0x2ba9c55d, 0x741831f6, 0xce5c3e16, 0x9b87931e,
57 0xafd6ba33, 0x6c24cf5c, 0x7a325381, 0x28958677,
58 0x3b8f4898, 0x6b4bb9af, 0xc4bfe81b, 0x66282193,
59 0x61d809cc, 0xfb21a991, 0x487cac60, 0x5dec8032,
60 0xef845d5d, 0xe98575b1, 0xdc262302, 0xeb651b88,
61 0x23893e81, 0xd396acc5, 0x0f6d6ff3, 0x83f44239,
62 0x2e0b4482, 0xa4842004, 0x69c8f04a, 0x9e1f9b5e,
63 0x21c66842, 0xf6e96c9a, 0x670c9c61, 0xabd388f0,
64 0x6a51a0d2, 0xd8542f68, 0x960fa728, 0xab5133a3,
65 0x6eef0b6c, 0x137a3be4, 0xba3bf050, 0x7efb2a98,
66 0xa1f1651d, 0x39af0176, 0x66ca593e, 0x82430e88,
67 0x8cee8619, 0x456f9fb4, 0x7d84a5c3, 0x3b8b5ebe,
68 0xe06f75d8, 0x85c12073, 0x401a449f, 0x56c16aa6,
69 0x4ed3aa62, 0x363f7706, 0x1bfedf72, 0x429b023d,
70 0x37d0d724, 0xd00a1248, 0xdb0fead3, 0x49f1c09b,
71 0x075372c9, 0x80991b7b, 0x25d479d8, 0xf6e8def7,
72 0xe3fe501a, 0xb6794c3b, 0x976ce0bd, 0x04c006ba,
73 0xc1a94fb6, 0x409f60c4, 0x5e5c9ec2, 0x196a2463,
74 0x68fb6faf, 0x3e6c53b5, 0x1339b2eb, 0x3b52ec6f,
75 0x6dfc511f, 0x9b30952c, 0xcc814544, 0xaf5ebd09,
76 0xbee3d004, 0xde334afd, 0x660f2807, 0x192e4bb3,
77 0xc0cba857, 0x45c8740f, 0xd20b5f39, 0xb9d3fbdb,
78 0x5579c0bd, 0x1a60320a, 0xd6a100c6, 0x402c7279,
79 0x679f25fe, 0xfb1fa3cc, 0x8ea5e9f8, 0xdb3222f8,
80 0x3c7516df, 0xfd616b15, 0x2f501ec8, 0xad0552ab,
81 0x323db5fa, 0xfd238760, 0x53317b48, 0x3e00df82,
82 0x9e5c57bb, 0xca6f8ca0, 0x1a87562e, 0xdf1769db,
83 0xd542a8f6, 0x287effc3, 0xac6732c6, 0x8c4f5573,
84 0x695b27b0, 0xbbca58c8, 0xe1ffa35d, 0xb8f011a0,
85 0x10fa3d98, 0xfd2183b8, 0x4afcb56c, 0x2dd1d35b,
86 0x9a53e479, 0xb6f84565, 0xd28e49bc, 0x4bfb9790,
87 0xe1ddf2da, 0xa4cb7e33, 0x62fb1341, 0xcee4c6e8,
88 0xef20cada, 0x36774c01, 0xd07e9efe, 0x2bf11fb4,
89 0x95dbda4d, 0xae909198, 0xeaad8e71, 0x6b93d5a0,
90 0xd08ed1d0, 0xafc725e0, 0x8e3c5b2f, 0x8e7594b7,
91 0x8ff6e2fb, 0xf2122b64, 0x8888b812, 0x900df01c,
92 0x4fad5ea0, 0x688fc31c, 0xd1cff191, 0xb3a8c1ad,
93 0x2f2f2218, 0xbe0e1777, 0xea752dfe, 0x8b021fa1,
94 0xe5a0cc0f, 0xb56f74e8, 0x18acf3d6, 0xce89e299,
95 0xb4a84fe0, 0xfd13e0b7, 0x7cc43b81, 0xd2ada8d9,
96 0x165fa266, 0x80957705, 0x93cc7314, 0x211a1477,
97 0xe6ad2065, 0x77b5fa86, 0xc75442f5, 0xfb9d35cf,
98 0xebcdaf0c, 0x7b3e89a0, 0xd6411bd3, 0xae1e7e49,
99 0x00250e2d, 0x2071b35e, 0x226800bb, 0x57b8e0af,
100 0x2464369b, 0xf009b91e, 0x5563911d, 0x59dfa6aa,
101 0x78c14389, 0xd95a537f, 0x207d5ba2, 0x02e5b9c5,
102 0x83260376, 0x6295cfa9, 0x11c81968, 0x4e734a41,
103 0xb3472dca, 0x7b14a94a, 0x1b510052, 0x9a532915,
104 0xd60f573f, 0xbc9bc6e4, 0x2b60a476, 0x81e67400,
105 0x08ba6fb5, 0x571be91f, 0xf296ec6b, 0x2a0dd915,
106 0xb6636521, 0xe7b9f9b6, 0xff34052e, 0xc5855664,
107 0x53b02d5d, 0xa99f8fa1, 0x08ba4799, 0x6e85076a,
108 0x4b7a70e9, 0xb5b32944, 0xdb75092e, 0xc4192623,
109 0xad6ea6b0, 0x49a7df7d, 0x9cee60b8, 0x8fedb266,
110 0xecaa8c71, 0x699a17ff, 0x5664526c, 0xc2b19ee1,
111 0x193602a5, 0x75094c29, 0xa0591340, 0xe4183a3e,
112 0x3f54989a, 0x5b429d65, 0x6b8fe4d6, 0x99f73fd6,
113 0xa1d29c07, 0xefe830f5, 0x4d2d38e6, 0xf0255dc1,
114 0x4cdd2086, 0x8470eb26, 0x6382e9c6, 0x021ecc5e,
115 0x09686b3f, 0x3ebaefc9, 0x3c971814, 0x6b6a70a1,
116 0x687f3584, 0x52a0e286, 0xb79c5305, 0xaa500737,
117 0x3e07841c, 0x7fdeae5c, 0x8e7d44ec, 0x5716f2b8,
118 0xb03ada37, 0xf0500c0d, 0xf01c1f04, 0x0200b3ff,
119 0xae0cf51a, 0x3cb574b2, 0x25837a58, 0xdc0921bd,
120 0xd19113f9, 0x7ca92ff6, 0x94324773, 0x22f54701,
121 0x3ae5e581, 0x37c2dadc, 0xc8b57634, 0x9af3dda7,
122 0xa9446146, 0x0fd0030e, 0xecc8c73e, 0xa4751e41,
123 0xe238cd99, 0x3bea0e2f, 0x3280bba1, 0x183eb331,
124 0x4e548b38, 0x4f6db908, 0x6f420d03, 0xf60a04bf,
125 0x2cb81290, 0x24977c79, 0x5679b072, 0xbcaf89af,
126 0xde9a771f, 0xd9930810, 0xb38bae12, 0xdccf3f2e,
127 0x5512721f, 0x2e6b7124, 0x501adde6, 0x9f84cd87,
128 0x7a584718, 0x7408da17, 0xbc9f9abc, 0xe94b7d8c,
129 0xec7aec3a, 0xdb851dfa, 0x63094366, 0xc464c3d2,
130 0xef1c1847, 0x3215d908, 0xdd433b37, 0x24c2ba16,
131 0x12a14d43, 0x2a65c451, 0x50940002, 0x133ae4dd,
132 0x71dff89e, 0x10314e55, 0x81ac77d6, 0x5f11199b,
133 0x043556f1, 0xd7a3c76b, 0x3c11183b, 0x5924a509,
134 0xf28fe6ed, 0x97f1fbfa, 0x9ebabf2c, 0x1e153c6e,
135 0x86e34570, 0xeae96fb1, 0x860e5e0a, 0x5a3e2ab3,
136 0x771fe71c, 0x4e3d06fa, 0x2965dcb9, 0x99e71d0f,
137 0x803e89d6, 0x5266c825, 0x2e4cc978, 0x9c10b36a,
138 0xc6150eba, 0x94e2ea78, 0xa5fc3c53, 0x1e0a2df4,
139 0xf2f74ea7, 0x361d2b3d, 0x1939260f, 0x19c27960,
140 0x5223a708, 0xf71312b6, 0xebadfe6e, 0xeac31f66,
141 0xe3bc4595, 0xa67bc883, 0xb17f37d1, 0x018cff28,
142 0xc332ddef, 0xbe6c5aa5, 0x65582185, 0x68ab9802,
143 0xeecea50f, 0xdb2f953b, 0x2aef7dad, 0x5b6e2f84,
144 0x1521b628, 0x29076170, 0xecdd4775, 0x619f1510,
145 0x13cca830, 0xeb61bd96, 0x0334fe1e, 0xaa0363cf,
146 0xb5735c90, 0x4c70a239, 0xd59e9e0b, 0xcbaade14,
147 0xeecc86bc, 0x60622ca7, 0x9cab5cab, 0xb2f3846e,
148 0x648b1eaf, 0x19bdf0ca, 0xa02369b9, 0x655abb50,
149 0x40685a32, 0x3c2ab4b3, 0x319ee9d5, 0xc021b8f7,
150 0x9b540b19, 0x875fa099, 0x95f7997e, 0x623d7da8,
151 0xf837889a, 0x97e32d77, 0x11ed935f, 0x16681281,
152 0x0e358829, 0xc7e61fd6, 0x96dedfa1, 0x7858ba99,
153 0x57f584a5, 0x1b227263, 0x9b83c3ff, 0x1ac24696,
154 0xcdb30aeb, 0x532e3054, 0x8fd948e4, 0x6dbc3128,
155 0x58ebf2ef, 0x34c6ffea, 0xfe28ed61, 0xee7c3c73,
156 0x5d4a14d9, 0xe864b7e3, 0x42105d14, 0x203e13e0,
157 0x45eee2b6, 0xa3aaabea, 0xdb6c4f15, 0xfacb4fd0,
158 0xc742f442, 0xef6abbb5, 0x654f3b1d, 0x41cd2105,
159 0xd81e799e, 0x86854dc7, 0xe44b476a, 0x3d816250,
160 0xcf62a1f2, 0x5b8d2646, 0xfc8883a0, 0xc1c7b6a3,
161 0x7f1524c3, 0x69cb7492, 0x47848a0b, 0x5692b285,
162 0x095bbf00, 0xad19489d, 0x1462b174, 0x23820e00,
163 0x58428d2a, 0x0c55f5ea, 0x1dadf43e, 0x233f7061,
164 0x3372f092, 0x8d937e41, 0xd65fecf1, 0x6c223bdb,
165 0x7cde3759, 0xcbee7460, 0x4085f2a7, 0xce77326e,
166 0xa6078084, 0x19f8509e, 0xe8efd855, 0x61d99735,
167 0xa969a7aa, 0xc50c06c2, 0x5a04abfc, 0x800bcadc,
168 0x9e447a2e, 0xc3453484, 0xfdd56705, 0x0e1e9ec9,
169 0xdb73dbd3, 0x105588cd, 0x675fda79, 0xe3674340,
170 0xc5c43465, 0x713e38d8, 0x3d28f89e, 0xf16dff20,
171 0x153e21e7, 0x8fb03d4a, 0xe6e39f2b, 0xdb83adf7,
172 0xe93d5a68, 0x948140f7, 0xf64c261c, 0x94692934,
173 0x411520f7, 0x7602d4f7, 0xbcf46b2e, 0xd4a20068,
174 0xd4082471, 0x3320f46a, 0x43b7d4b7, 0x500061af,
175 0x1e39f62e, 0x97244546, 0x14214f74, 0xbf8b8840,
176 0x4d95fc1d, 0x96b591af, 0x70f4ddd3, 0x66a02f45,
177 0xbfbc09ec, 0x03bd9785, 0x7fac6dd0, 0x31cb8504,
178 0x96eb27b3, 0x55fd3941, 0xda2547e6, 0xabca0a9a,
179 0x28507825, 0x530429f4, 0x0a2c86da, 0xe9b66dfb,
180 0x68dc1462, 0xd7486900, 0x680ec0a4, 0x27a18dee,
181 0x4f3ffea2, 0xe887ad8c, 0xb58ce006, 0x7af4d6b6,
182 0xaace1e7c, 0xd3375fec, 0xce78a399, 0x406b2a42,
183 0x20fe9e35, 0xd9f385b9, 0xee39d7ab, 0x3b124e8b,
184 0x1dc9faf7, 0x4b6d1856, 0x26a36631, 0xeae397b2,
185 0x3a6efa74, 0xdd5b4332, 0x6841e7f7, 0xca7820fb,
186 0xfb0af54e, 0xd8feb397, 0x454056ac, 0xba489527,
187 0x55533a3a, 0x20838d87, 0xfe6ba9b7, 0xd096954b,
188 0x55a867bc, 0xa1159a58, 0xcca92963, 0x99e1db33,
189 0xa62a4a56, 0x3f3125f9, 0x5ef47e1c, 0x9029317c,
190 0xfdf8e802, 0x04272f70, 0x80bb155c, 0x05282ce3,
191 0x95c11548, 0xe4c66d22, 0x48c1133f, 0xc70f86dc,
192 0x07f9c9ee, 0x41041f0f, 0x404779a4, 0x5d886e17,
193 0x325f51eb, 0xd59bc0d1, 0xf2bcc18f, 0x41113564,
194 0x257b7834, 0x602a9c60, 0xdff8e8a3, 0x1f636c1b,
195 0x0e12b4c2, 0x02e1329e, 0xaf664fd1, 0xcad18115,
196 0x6b2395e0, 0x333e92e1, 0x3b240b62, 0xeebeb922,
197 0x85b2a20e, 0xe6ba0d99, 0xde720c8c, 0x2da2f728,
198 0xd0127845, 0x95b794fd, 0x647d0862, 0xe7ccf5f0,
199 0x5449a36f, 0x877d48fa, 0xc39dfd27, 0xf33e8d1e,
200 0x0a476341, 0x992eff74, 0x3a6f6eab, 0xf4f8fd37,
201 0xa812dc60, 0xa1ebddf8, 0x991be14c, 0xdb6e6b0d,
202 0xc67b5510, 0x6d672c37, 0x2765d43b, 0xdcd0e804,
203 0xf1290dc7, 0xcc00ffa3, 0xb5390f92, 0x690fed0b,
204 0x667b9ffb, 0xcedb7d9c, 0xa091cf0b, 0xd9155ea3,
205 0xbb132f88, 0x515bad24, 0x7b9479bf, 0x763bd6eb,
206 0x37392eb3, 0xcc115979, 0x8026e297, 0xf42e312d,
207 0x6842ada7, 0xc66a2b3b, 0x12754ccc, 0x782ef11c,
208 0x6a124237, 0xb79251e7, 0x06a1bbe6, 0x4bfb6350,
209 0x1a6b1018, 0x11caedfa, 0x3d25bdd8, 0xe2e1c3c9,
210 0x44421659, 0x0a121386, 0xd90cec6e, 0xd5abea2a,
211 0x64af674e, 0xda86a85f, 0xbebfe988, 0x64e4c3fe,
212 0x9dbc8057, 0xf0f7c086, 0x60787bf8, 0x6003604d,
213 0xd1fd8346, 0xf6381fb0, 0x7745ae04, 0xd736fccc,
214 0x83426b33, 0xf01eab71, 0xb0804187, 0x3c005e5f,
215 0x77a057be, 0xbde8ae24, 0x55464299, 0xbf582e61,
216 0x4e58f48f, 0xf2ddfda2, 0xf474ef38, 0x8789bdc2,
217 0x5366f9c3, 0xc8b38e74, 0xb475f255, 0x46fcd9b9,
218 0x7aeb2661, 0x8b1ddf84, 0x846a0e79, 0x915f95e2,
219 0x466e598e, 0x20b45770, 0x8cd55591, 0xc902de4c,
220 0xb90bace1, 0xbb8205d0, 0x11a86248, 0x7574a99e,
221 0xb77f19b6, 0xe0a9dc09, 0x662d09a1, 0xc4324633,
222 0xe85a1f02, 0x09f0be8c, 0x4a99a025, 0x1d6efe10,
223 0x1ab93d1d, 0x0ba5a4df, 0xa186f20f, 0x2868f169,
224 0xdcb7da83, 0x573906fe, 0xa1e2ce9b, 0x4fcd7f52,
225 0x50115e01, 0xa70683fa, 0xa002b5c4, 0x0de6d027,
226 0x9af88c27, 0x773f8641, 0xc3604c06, 0x61a806b5,
227 0xf0177a28, 0xc0f586e0, 0x006058aa, 0x30dc7d62,
228 0x11e69ed7, 0x2338ea63, 0x53c2dd94, 0xc2c21634,
229 0xbbcbee56, 0x90bcb6de, 0xebfc7da1, 0xce591d76,
230 0x6f05e409, 0x4b7c0188, 0x39720a3d, 0x7c927c24,
231 0x86e3725f, 0x724d9db9, 0x1ac15bb4, 0xd39eb8fc,
232 0xed545578, 0x08fca5b5, 0xd83d7cd3, 0x4dad0fc4,
233 0x1e50ef5e, 0xb161e6f8, 0xa28514d9, 0x6c51133c,
234 0x6fd5c7e7, 0x56e14ec4, 0x362abfce, 0xddc6c837,
235 0xd79a3234, 0x92638212, 0x670efa8e, 0x406000e0,
236 0x3a39ce37, 0xd3faf5cf, 0xabc27737, 0x5ac52d1b,
237 0x5cb0679e, 0x4fa33742, 0xd3822740, 0x99bc9bbe,
238 0xd5118e9d, 0xbf0f7315, 0xd62d1c7e, 0xc700c47b,
239 0xb78c1b6b, 0x21a19045, 0xb26eb1be, 0x6a366eb4,
240 0x5748ab2f, 0xbc946e79, 0xc6a376d2, 0x6549c2c8,
241 0x530ff8ee, 0x468dde7d, 0xd5730a1d, 0x4cd04dc6,
242 0x2939bbdb, 0xa9ba4650, 0xac9526e8, 0xbe5ee304,
243 0xa1fad5f0, 0x6a2d519a, 0x63ef8ce2, 0x9a86ee22,
244 0xc089c2b8, 0x43242ef6, 0xa51e03aa, 0x9cf2d0a4,
245 0x83c061ba, 0x9be96a4d, 0x8fe51550, 0xba645bd6,
246 0x2826a2f9, 0xa73a3ae1, 0x4ba99586, 0xef5562e9,
247 0xc72fefd3, 0xf752f7da, 0x3f046f69, 0x77fa0a59,
248 0x80e4a915, 0x87b08601, 0x9b09e6ad, 0x3b3ee593,
249 0xe990fd5a, 0x9e34d797, 0x2cf0b7d9, 0x022b8b51,
250 0x96d5ac3a, 0x017da67d, 0xd1cf3ed6, 0x7c7d2d28,
251 0x1f9f25cf, 0xadf2b89b, 0x5ad6b472, 0x5a88f54c,
252 0xe029ac71, 0xe019a5e6, 0x47b0acfd, 0xed93fa9b,
253 0xe8d3c48d, 0x283b57cc, 0xf8d56629, 0x79132e28,
254 0x785f0191, 0xed756055, 0xf7960e44, 0xe3d35e8c,
255 0x15056dd4, 0x88f46dba, 0x03a16125, 0x0564f0bd,
256 0xc3eb9e15, 0x3c9057a2, 0x97271aec, 0xa93a072a,
257 0x1b3f6d9b, 0x1e6321f5, 0xf59c66fb, 0x26dcf319,
258 0x7533d928, 0xb155fdf5, 0x03563482, 0x8aba3cbb,
259 0x28517711, 0xc20ad9f8, 0xabcc5167, 0xccad925f,
260 0x4de81751, 0x3830dc8e, 0x379d5862, 0x9320f991,
261 0xea7a90c2, 0xfb3e7bce, 0x5121ce64, 0x774fbe32,
262 0xa8b6e37e, 0xc3293d46, 0x48de5369, 0x6413e680,
263 0xa2ae0810, 0xdd6db224, 0x69852dfd, 0x09072166,
264 0xb39a460a, 0x6445c0dd, 0x586cdecf, 0x1c20c8ae,
265 0x5bbef7dd, 0x1b588d40, 0xccd2017f, 0x6bb4e3bb,
266 0xdda26a7e, 0x3a59ff45, 0x3e350a44, 0xbcb4cdd5,
267 0x72eacea8, 0xfa6484bb, 0x8d6612ae, 0xbf3c6f47,
268 0xd29be463, 0x542f5d9e, 0xaec2771b, 0xf64e6370,
269 0x740e0d8d, 0xe75b1357, 0xf8721671, 0xaf537d5d,
270 0x4040cb08, 0x4eb4e2cc, 0x34d2466a, 0x0115af84,
271 0xe1b00428, 0x95983a1d, 0x06b89fb4, 0xce6ea048,
272 0x6f3f3b82, 0x3520ab82, 0x011a1d4b, 0x277227f8,
273 0x611560b1, 0xe7933fdc, 0xbb3a792b, 0x344525bd,
274 0xa08839e1, 0x51ce794b, 0x2f32c9b7, 0xa01fbac9,
275 0xe01cc87e, 0xbcc7d1f6, 0xcf0111c3, 0xa1e8aac7,
276 0x1a908749, 0xd44fbd9a, 0xd0dadecb, 0xd50ada38,
277 0x0339c32a, 0xc6913667, 0x8df9317c, 0xe0b12b4f,
278 0xf79e59b7, 0x43f5bb3a, 0xf2d519ff, 0x27d9459c,
279 0xbf97222c, 0x15e6fc2a, 0x0f91fc71, 0x9b941525,
280 0xfae59361, 0xceb69ceb, 0xc2a86459, 0x12baa8d1,
281 0xb6c1075e, 0xe3056a0c, 0x10d25065, 0xcb03a442,
282 0xe0ec6e0e, 0x1698db3b, 0x4c98a0be, 0x3278e964,
283 0x9f1f9532, 0xe0d392df, 0xd3a0342b, 0x8971f21e,
284 0x1b0a7441, 0x4ba3348c, 0xc5be7120, 0xc37632d8,
285 0xdf359f8d, 0x9b992f2e, 0xe60b6f47, 0x0fe3f11d,
286 0xe54cda54, 0x1edad891, 0xce6279cf, 0xcd3e7e6f,
287 0x1618b166, 0xfd2c1d05, 0x848fd2c5, 0xf6fb2299,
288 0xf523f357, 0xa6327623, 0x93a83531, 0x56cccd02,
289 0xacf08162, 0x5a75ebb5, 0x6e163697, 0x88d273cc,
290 0xde966292, 0x81b949d0, 0x4c50901b, 0x71c65614,
291 0xe6c6c7bd, 0x327a140a, 0x45e1d006, 0xc3f27b9a,
292 0xc9aa53fd, 0x62a80f00, 0xbb25bfe2, 0x35bdd2f6,
293 0x71126905, 0xb2040222, 0xb6cbcf7c, 0xcd769c2b,
294 0x53113ec0, 0x1640e3d3, 0x38abbd60, 0x2547adf0,
295 0xba38209c, 0xf746ce76, 0x77afa1c5, 0x20756060,
296 0x85cbfe4e, 0x8ae88dd8, 0x7aaaf9b0, 0x4cf9aa7e,
297 0x1948c25c, 0x02fb8a8c, 0x01c36ae4, 0xd6ebe1f9,
298 0x90d4f869, 0xa65cdea0, 0x3f09252d, 0xc208e69f,
299 0xb74e6132, 0xce77e25b, 0x578fdfe3, 0x3ac372e6,
300};
301
302
303
304
305
306#define GET32_3(x) (((x) & 0xff))
307#define GET32_2(x) (((x) >> (8)) & (0xff))
308#define GET32_1(x) (((x) >> (16)) & (0xff))
309#define GET32_0(x) (((x) >> (24)) & (0xff))
310
311#define bf_F(x) (((S[GET32_0(x)] + S[256 + GET32_1(x)]) ^ \
312 S[512 + GET32_2(x)]) + S[768 + GET32_3(x)])
313
314#define ROUND(a, b, n) b ^= P[n]; a ^= bf_F (b)
315
316
317
318
319
320static void encrypt_block(struct bf_ctx *bctx, u32 *dst, u32 *src)
321{
322 const u32 *P = bctx->p;
323 const u32 *S = bctx->s;
324 u32 yl = src[0];
325 u32 yr = src[1];
326
327 ROUND(yr, yl, 0);
328 ROUND(yl, yr, 1);
329 ROUND(yr, yl, 2);
330 ROUND(yl, yr, 3);
331 ROUND(yr, yl, 4);
332 ROUND(yl, yr, 5);
333 ROUND(yr, yl, 6);
334 ROUND(yl, yr, 7);
335 ROUND(yr, yl, 8);
336 ROUND(yl, yr, 9);
337 ROUND(yr, yl, 10);
338 ROUND(yl, yr, 11);
339 ROUND(yr, yl, 12);
340 ROUND(yl, yr, 13);
341 ROUND(yr, yl, 14);
342 ROUND(yl, yr, 15);
343
344 yl ^= P[16];
345 yr ^= P[17];
346
347 dst[0] = yr;
348 dst[1] = yl;
349}
350
351static void bf_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
352{
353 const __be32 *in_blk = (const __be32 *)src;
354 __be32 *const out_blk = (__be32 *)dst;
355 u32 in32[2], out32[2];
356
357 in32[0] = be32_to_cpu(in_blk[0]);
358 in32[1] = be32_to_cpu(in_blk[1]);
359 encrypt_block(crypto_tfm_ctx(tfm), out32, in32);
360 out_blk[0] = cpu_to_be32(out32[0]);
361 out_blk[1] = cpu_to_be32(out32[1]);
362}
363
364static void bf_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
365{
366 struct bf_ctx *ctx = crypto_tfm_ctx(tfm);
367 const __be32 *in_blk = (const __be32 *)src;
368 __be32 *const out_blk = (__be32 *)dst;
369 const u32 *P = ctx->p;
370 const u32 *S = ctx->s;
371 u32 yl = be32_to_cpu(in_blk[0]);
372 u32 yr = be32_to_cpu(in_blk[1]);
373
374 ROUND(yr, yl, 17);
375 ROUND(yl, yr, 16);
376 ROUND(yr, yl, 15);
377 ROUND(yl, yr, 14);
378 ROUND(yr, yl, 13);
379 ROUND(yl, yr, 12);
380 ROUND(yr, yl, 11);
381 ROUND(yl, yr, 10);
382 ROUND(yr, yl, 9);
383 ROUND(yl, yr, 8);
384 ROUND(yr, yl, 7);
385 ROUND(yl, yr, 6);
386 ROUND(yr, yl, 5);
387 ROUND(yl, yr, 4);
388 ROUND(yr, yl, 3);
389 ROUND(yl, yr, 2);
390
391 yl ^= P[1];
392 yr ^= P[0];
393
394 out_blk[0] = cpu_to_be32(yr);
395 out_blk[1] = cpu_to_be32(yl);
396}
397
398
399
400
401static int bf_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen)
402{
403 struct bf_ctx *ctx = crypto_tfm_ctx(tfm);
404 u32 *P = ctx->p;
405 u32 *S = ctx->s;
406 short i, j, count;
407 u32 data[2], temp;
408
409
410 for (i = 0, count = 0; i < 256; i++)
411 for (j = 0; j < 4; j++, count++)
412 S[count] = bf_sbox[count];
413
414
415 for (i = 0; i < 16 + 2; i++)
416 P[i] = bf_pbox[i];
417
418
419 for (j = 0, i = 0; i < 16 + 2; i++) {
420 temp = (((u32)key[j] << 24) |
421 ((u32)key[(j + 1) % keylen] << 16) |
422 ((u32)key[(j + 2) % keylen] << 8) |
423 ((u32)key[(j + 3) % keylen]));
424
425 P[i] = P[i] ^ temp;
426 j = (j + 4) % keylen;
427 }
428
429 data[0] = 0x00000000;
430 data[1] = 0x00000000;
431
432 for (i = 0; i < 16 + 2; i += 2) {
433 encrypt_block((struct bf_ctx *)ctx, data, data);
434
435 P[i] = data[0];
436 P[i + 1] = data[1];
437 }
438
439 for (i = 0; i < 4; i++) {
440 for (j = 0, count = i * 256; j < 256; j += 2, count += 2) {
441 encrypt_block((struct bf_ctx *)ctx, data, data);
442
443 S[count] = data[0];
444 S[count + 1] = data[1];
445 }
446 }
447
448
449 return 0;
450}
451
452static struct crypto_alg alg = {
453 .cra_name = "blowfish",
454 .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
455 .cra_blocksize = BF_BLOCK_SIZE,
456 .cra_ctxsize = sizeof(struct bf_ctx),
457 .cra_alignmask = 3,
458 .cra_module = THIS_MODULE,
459 .cra_list = LIST_HEAD_INIT(alg.cra_list),
460 .cra_u = { .cipher = {
461 .cia_min_keysize = BF_MIN_KEY_SIZE,
462 .cia_max_keysize = BF_MAX_KEY_SIZE,
463 .cia_setkey = bf_setkey,
464 .cia_encrypt = bf_encrypt,
465 .cia_decrypt = bf_decrypt } }
466};
467
468static int __init blowfish_mod_init(void)
469{
470 return crypto_register_alg(&alg);
471}
472
473static void __exit blowfish_mod_fini(void)
474{
475 crypto_unregister_alg(&alg);
476}
477
478module_init(blowfish_mod_init);
479module_exit(blowfish_mod_fini);
480
481MODULE_LICENSE("GPL");
482MODULE_DESCRIPTION("Blowfish Cipher Algorithm");
483
