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