crypto/blowfish.c

   1 /*
   2  * Cryptographic API.
   3  *
   4  * Blowfish Cipher Algorithm, by Bruce Schneier.
   5  * http://www.counterpane.com/blowfish.html
   6  *
   7  * Adapted from Kerneli implementation.
   8  *
   9  * Copyright (c) Herbert Valerio Riedel <hvr@hvrlab.org>
  10  * Copyright (c) Kyle McMartin <kyle@debian.org>
  11  * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  */
  19 #include <linux/init.h>
  20 #include <linux/module.h>
  21 #include <linux/mm.h>
  22 #include <asm/byteorder.h>
  23 #include <asm/scatterlist.h>
  24 #include <linux/crypto.h>
  25 #include <linux/types.h>
  26
  27 #define BF_BLOCK_SIZE 8
  28 #define BF_MIN_KEY_SIZE 4
  29 #define BF_MAX_KEY_SIZE 56
  30
  31 struct bf_ctx {
  32         u32 p[18];
  33         u32 s[1024];
  34 };
  35
  36 static const u32 bf_pbox[16 + 2] = {
  37         0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344,
  38         0xa4093822, 0x299f31d0, 0x082efa98, 0xec4e6c89,
  39         0x452821e6, 0x38d01377, 0xbe5466cf, 0x34e90c6c,
  40         0xc0ac29b7, 0xc97c50dd, 0x3f84d5b5, 0xb5470917,
  41         0x9216d5d9, 0x8979fb1b,
  42 };
  43
  44 static const u32 bf_sbox[256 * 4] = {
  45         0xd1310ba6, 0x98dfb5ac, 0x2ffd72db, 0xd01adfb7,
  46         0xb8e1afed, 0x6a267e96, 0xba7c9045, 0xf12c7f99,
  47         0x24a19947, 0xb3916cf7, 0x0801f2e2, 0x858efc16,
  48         0x636920d8, 0x71574e69, 0xa458fea3, 0xf4933d7e,
  49         0x0d95748f, 0x728eb658, 0x718bcd58, 0x82154aee,
  50         0x7b54a41d, 0xc25a59b5, 0x9c30d539, 0x2af26013,
  51         0xc5d1b023, 0x286085f0, 0xca417918, 0xb8db38ef,
  52         0x8e79dcb0, 0x603a180e, 0x6c9e0e8b, 0xb01e8a3e,
  53         0xd71577c1, 0xbd314b27, 0x78af2fda, 0x55605c60,
  54         0xe65525f3, 0xaa55ab94, 0x57489862, 0x63e81440,
  55         0x55ca396a, 0x2aab10b6, 0xb4cc5c34, 0x1141e8ce,
  56         0xa15486af, 0x7c72e993, 0xb3ee1411, 0x636fbc2a,
  57         0x2ba9c55d, 0x741831f6, 0xce5c3e16, 0x9b87931e,
  58         0xafd6ba33, 0x6c24cf5c, 0x7a325381, 0x28958677,
  59         0x3b8f4898, 0x6b4bb9af, 0xc4bfe81b, 0x66282193,
  60         0x61d809cc, 0xfb21a991, 0x487cac60, 0x5dec8032,
  61         0xef845d5d, 0xe98575b1, 0xdc262302, 0xeb651b88,
  62         0x23893e81, 0xd396acc5, 0x0f6d6ff3, 0x83f44239,
  63         0x2e0b4482, 0xa4842004, 0x69c8f04a, 0x9e1f9b5e,
  64         0x21c66842, 0xf6e96c9a, 0x670c9c61, 0xabd388f0,
  65         0x6a51a0d2, 0xd8542f68, 0x960fa728, 0xab5133a3,
  66         0x6eef0b6c, 0x137a3be4, 0xba3bf050, 0x7efb2a98,
  67         0xa1f1651d, 0x39af0176, 0x66ca593e, 0x82430e88,
  68         0x8cee8619, 0x456f9fb4, 0x7d84a5c3, 0x3b8b5ebe,
  69         0xe06f75d8, 0x85c12073, 0x401a449f, 0x56c16aa6,
  70         0x4ed3aa62, 0x363f7706, 0x1bfedf72, 0x429b023d,
  71         0x37d0d724, 0xd00a1248, 0xdb0fead3, 0x49f1c09b,
  72         0x075372c9, 0x80991b7b, 0x25d479d8, 0xf6e8def7,
  73         0xe3fe501a, 0xb6794c3b, 0x976ce0bd, 0x04c006ba,
  74         0xc1a94fb6, 0x409f60c4, 0x5e5c9ec2, 0x196a2463,
  75         0x68fb6faf, 0x3e6c53b5, 0x1339b2eb, 0x3b52ec6f,
  76         0x6dfc511f, 0x9b30952c, 0xcc814544, 0xaf5ebd09,
  77         0xbee3d004, 0xde334afd, 0x660f2807, 0x192e4bb3,
  78         0xc0cba857, 0x45c8740f, 0xd20b5f39, 0xb9d3fbdb,
  79         0x5579c0bd, 0x1a60320a, 0xd6a100c6, 0x402c7279,
  80         0x679f25fe, 0xfb1fa3cc, 0x8ea5e9f8, 0xdb3222f8,
  81         0x3c7516df, 0xfd616b15, 0x2f501ec8, 0xad0552ab,
  82         0x323db5fa, 0xfd238760, 0x53317b48, 0x3e00df82,
  83         0x9e5c57bb, 0xca6f8ca0, 0x1a87562e, 0xdf1769db,
  84         0xd542a8f6, 0x287effc3, 0xac6732c6, 0x8c4f5573,
  85         0x695b27b0, 0xbbca58c8, 0xe1ffa35d, 0xb8f011a0,
  86         0x10fa3d98, 0xfd2183b8, 0x4afcb56c, 0x2dd1d35b,
  87         0x9a53e479, 0xb6f84565, 0xd28e49bc, 0x4bfb9790,
  88         0xe1ddf2da, 0xa4cb7e33, 0x62fb1341, 0xcee4c6e8,
  89         0xef20cada, 0x36774c01, 0xd07e9efe, 0x2bf11fb4,
  90         0x95dbda4d, 0xae909198, 0xeaad8e71, 0x6b93d5a0,
  91         0xd08ed1d0, 0xafc725e0, 0x8e3c5b2f, 0x8e7594b7,
  92         0x8ff6e2fb, 0xf2122b64, 0x8888b812, 0x900df01c,
  93         0x4fad5ea0, 0x688fc31c, 0xd1cff191, 0xb3a8c1ad,
  94         0x2f2f2218, 0xbe0e1777, 0xea752dfe, 0x8b021fa1,
  95         0xe5a0cc0f, 0xb56f74e8, 0x18acf3d6, 0xce89e299,
  96         0xb4a84fe0, 0xfd13e0b7, 0x7cc43b81, 0xd2ada8d9,
  97         0x165fa266, 0x80957705, 0x93cc7314, 0x211a1477,
  98         0xe6ad2065, 0x77b5fa86, 0xc75442f5, 0xfb9d35cf,
  99         0xebcdaf0c, 0x7b3e89a0, 0xd6411bd3, 0xae1e7e49,
 100         0x00250e2d, 0x2071b35e, 0x226800bb, 0x57b8e0af,
 101         0x2464369b, 0xf009b91e, 0x5563911d, 0x59dfa6aa,
 102         0x78c14389, 0xd95a537f, 0x207d5ba2, 0x02e5b9c5,
 103         0x83260376, 0x6295cfa9, 0x11c81968, 0x4e734a41,
 104         0xb3472dca, 0x7b14a94a, 0x1b510052, 0x9a532915,
 105         0xd60f573f, 0xbc9bc6e4, 0x2b60a476, 0x81e67400,
 106         0x08ba6fb5, 0x571be91f, 0xf296ec6b, 0x2a0dd915,
 107         0xb6636521, 0xe7b9f9b6, 0xff34052e, 0xc5855664,
 108         0x53b02d5d, 0xa99f8fa1, 0x08ba4799, 0x6e85076a,
 109         0x4b7a70e9, 0xb5b32944, 0xdb75092e, 0xc4192623,
 110         0xad6ea6b0, 0x49a7df7d, 0x9cee60b8, 0x8fedb266,
 111         0xecaa8c71, 0x699a17ff, 0x5664526c, 0xc2b19ee1,
 112         0x193602a5, 0x75094c29, 0xa0591340, 0xe4183a3e,
 113         0x3f54989a, 0x5b429d65, 0x6b8fe4d6, 0x99f73fd6,
 114         0xa1d29c07, 0xefe830f5, 0x4d2d38e6, 0xf0255dc1,
 115         0x4cdd2086, 0x8470eb26, 0x6382e9c6, 0x021ecc5e,
 116         0x09686b3f, 0x3ebaefc9, 0x3c971814, 0x6b6a70a1,
 117         0x687f3584, 0x52a0e286, 0xb79c5305, 0xaa500737,
 118         0x3e07841c, 0x7fdeae5c, 0x8e7d44ec, 0x5716f2b8,
 119         0xb03ada37, 0xf0500c0d, 0xf01c1f04, 0x0200b3ff,
 120         0xae0cf51a, 0x3cb574b2, 0x25837a58, 0xdc0921bd,
 121         0xd19113f9, 0x7ca92ff6, 0x94324773, 0x22f54701,
 122         0x3ae5e581, 0x37c2dadc, 0xc8b57634, 0x9af3dda7,
 123         0xa9446146, 0x0fd0030e, 0xecc8c73e, 0xa4751e41,
 124         0xe238cd99, 0x3bea0e2f, 0x3280bba1, 0x183eb331,
 125         0x4e548b38, 0x4f6db908, 0x6f420d03, 0xf60a04bf,
 126         0x2cb81290, 0x24977c79, 0x5679b072, 0xbcaf89af,
 127         0xde9a771f, 0xd9930810, 0xb38bae12, 0xdccf3f2e,
 128         0x5512721f, 0x2e6b7124, 0x501adde6, 0x9f84cd87,
 129         0x7a584718, 0x7408da17, 0xbc9f9abc, 0xe94b7d8c,
 130         0xec7aec3a, 0xdb851dfa, 0x63094366, 0xc464c3d2,
 131         0xef1c1847, 0x3215d908, 0xdd433b37, 0x24c2ba16,
 132         0x12a14d43, 0x2a65c451, 0x50940002, 0x133ae4dd,
 133         0x71dff89e, 0x10314e55, 0x81ac77d6, 0x5f11199b,
 134         0x043556f1, 0xd7a3c76b, 0x3c11183b, 0x5924a509,
 135         0xf28fe6ed, 0x97f1fbfa, 0x9ebabf2c, 0x1e153c6e,
 136         0x86e34570, 0xeae96fb1, 0x860e5e0a, 0x5a3e2ab3,
 137         0x771fe71c, 0x4e3d06fa, 0x2965dcb9, 0x99e71d0f,
 138         0x803e89d6, 0x5266c825, 0x2e4cc978, 0x9c10b36a,
 139         0xc6150eba, 0x94e2ea78, 0xa5fc3c53, 0x1e0a2df4,
 140         0xf2f74ea7, 0x361d2b3d, 0x1939260f, 0x19c27960,
 141         0x5223a708, 0xf71312b6, 0xebadfe6e, 0xeac31f66,
 142         0xe3bc4595, 0xa67bc883, 0xb17f37d1, 0x018cff28,
 143         0xc332ddef, 0xbe6c5aa5, 0x65582185, 0x68ab9802,
 144         0xeecea50f, 0xdb2f953b, 0x2aef7dad, 0x5b6e2f84,
 145         0x1521b628, 0x29076170, 0xecdd4775, 0x619f1510,
 146         0x13cca830, 0xeb61bd96, 0x0334fe1e, 0xaa0363cf,
 147         0xb5735c90, 0x4c70a239, 0xd59e9e0b, 0xcbaade14,
 148         0xeecc86bc, 0x60622ca7, 0x9cab5cab, 0xb2f3846e,
 149         0x648b1eaf, 0x19bdf0ca, 0xa02369b9, 0x655abb50,
 150         0x40685a32, 0x3c2ab4b3, 0x319ee9d5, 0xc021b8f7,
 151         0x9b540b19, 0x875fa099, 0x95f7997e, 0x623d7da8,
 152         0xf837889a, 0x97e32d77, 0x11ed935f, 0x16681281,
 153         0x0e358829, 0xc7e61fd6, 0x96dedfa1, 0x7858ba99,
 154         0x57f584a5, 0x1b227263, 0x9b83c3ff, 0x1ac24696,
 155         0xcdb30aeb, 0x532e3054, 0x8fd948e4, 0x6dbc3128,
 156         0x58ebf2ef, 0x34c6ffea, 0xfe28ed61, 0xee7c3c73,
 157         0x5d4a14d9, 0xe864b7e3, 0x42105d14, 0x203e13e0,
 158         0x45eee2b6, 0xa3aaabea, 0xdb6c4f15, 0xfacb4fd0,
 159         0xc742f442, 0xef6abbb5, 0x654f3b1d, 0x41cd2105,
 160         0xd81e799e, 0x86854dc7, 0xe44b476a, 0x3d816250,
 161         0xcf62a1f2, 0x5b8d2646, 0xfc8883a0, 0xc1c7b6a3,
 162         0x7f1524c3, 0x69cb7492, 0x47848a0b, 0x5692b285,
 163         0x095bbf00, 0xad19489d, 0x1462b174, 0x23820e00,
 164         0x58428d2a, 0x0c55f5ea, 0x1dadf43e, 0x233f7061,
 165         0x3372f092, 0x8d937e41, 0xd65fecf1, 0x6c223bdb,
 166         0x7cde3759, 0xcbee7460, 0x4085f2a7, 0xce77326e,
 167         0xa6078084, 0x19f8509e, 0xe8efd855, 0x61d99735,
 168         0xa969a7aa, 0xc50c06c2, 0x5a04abfc, 0x800bcadc,
 169         0x9e447a2e, 0xc3453484, 0xfdd56705, 0x0e1e9ec9,
 170         0xdb73dbd3, 0x105588cd, 0x675fda79, 0xe3674340,
 171         0xc5c43465, 0x713e38d8, 0x3d28f89e, 0xf16dff20,
 172         0x153e21e7, 0x8fb03d4a, 0xe6e39f2b, 0xdb83adf7,
 173         0xe93d5a68, 0x948140f7, 0xf64c261c, 0x94692934,
 174         0x411520f7, 0x7602d4f7, 0xbcf46b2e, 0xd4a20068,
 175         0xd4082471, 0x3320f46a, 0x43b7d4b7, 0x500061af,
 176         0x1e39f62e, 0x97244546, 0x14214f74, 0xbf8b8840,
 177         0x4d95fc1d, 0x96b591af, 0x70f4ddd3, 0x66a02f45,
 178         0xbfbc09ec, 0x03bd9785, 0x7fac6dd0, 0x31cb8504,
 179         0x96eb27b3, 0x55fd3941, 0xda2547e6, 0xabca0a9a,
 180         0x28507825, 0x530429f4, 0x0a2c86da, 0xe9b66dfb,
 181         0x68dc1462, 0xd7486900, 0x680ec0a4, 0x27a18dee,
 182         0x4f3ffea2, 0xe887ad8c, 0xb58ce006, 0x7af4d6b6,
 183         0xaace1e7c, 0xd3375fec, 0xce78a399, 0x406b2a42,
 184         0x20fe9e35, 0xd9f385b9, 0xee39d7ab, 0x3b124e8b,
 185         0x1dc9faf7, 0x4b6d1856, 0x26a36631, 0xeae397b2,
 186         0x3a6efa74, 0xdd5b4332, 0x6841e7f7, 0xca7820fb,
 187         0xfb0af54e, 0xd8feb397, 0x454056ac, 0xba489527,
 188         0x55533a3a, 0x20838d87, 0xfe6ba9b7, 0xd096954b,
 189         0x55a867bc, 0xa1159a58, 0xcca92963, 0x99e1db33,
 190         0xa62a4a56, 0x3f3125f9, 0x5ef47e1c, 0x9029317c,
 191         0xfdf8e802, 0x04272f70, 0x80bb155c, 0x05282ce3,
 192         0x95c11548, 0xe4c66d22, 0x48c1133f, 0xc70f86dc,
 193         0x07f9c9ee, 0x41041f0f, 0x404779a4, 0x5d886e17,
 194         0x325f51eb, 0xd59bc0d1, 0xf2bcc18f, 0x41113564,
 195         0x257b7834, 0x602a9c60, 0xdff8e8a3, 0x1f636c1b,
 196         0x0e12b4c2, 0x02e1329e, 0xaf664fd1, 0xcad18115,
 197         0x6b2395e0, 0x333e92e1, 0x3b240b62, 0xeebeb922,
 198         0x85b2a20e, 0xe6ba0d99, 0xde720c8c, 0x2da2f728,
 199         0xd0127845, 0x95b794fd, 0x647d0862, 0xe7ccf5f0,
 200         0x5449a36f, 0x877d48fa, 0xc39dfd27, 0xf33e8d1e,
 201         0x0a476341, 0x992eff74, 0x3a6f6eab, 0xf4f8fd37,
 202         0xa812dc60, 0xa1ebddf8, 0x991be14c, 0xdb6e6b0d,
 203         0xc67b5510, 0x6d672c37, 0x2765d43b, 0xdcd0e804,
 204         0xf1290dc7, 0xcc00ffa3, 0xb5390f92, 0x690fed0b,
 205         0x667b9ffb, 0xcedb7d9c, 0xa091cf0b, 0xd9155ea3,
 206         0xbb132f88, 0x515bad24, 0x7b9479bf, 0x763bd6eb,
 207         0x37392eb3, 0xcc115979, 0x8026e297, 0xf42e312d,
 208         0x6842ada7, 0xc66a2b3b, 0x12754ccc, 0x782ef11c,
 209         0x6a124237, 0xb79251e7, 0x06a1bbe6, 0x4bfb6350,
 210         0x1a6b1018, 0x11caedfa, 0x3d25bdd8, 0xe2e1c3c9,
 211         0x44421659, 0x0a121386, 0xd90cec6e, 0xd5abea2a,
 212         0x64af674e, 0xda86a85f, 0xbebfe988, 0x64e4c3fe,
 213         0x9dbc8057, 0xf0f7c086, 0x60787bf8, 0x6003604d,
 214         0xd1fd8346, 0xf6381fb0, 0x7745ae04, 0xd736fccc,
 215         0x83426b33, 0xf01eab71, 0xb0804187, 0x3c005e5f,
 216         0x77a057be, 0xbde8ae24, 0x55464299, 0xbf582e61,
 217         0x4e58f48f, 0xf2ddfda2, 0xf474ef38, 0x8789bdc2,
 218         0x5366f9c3, 0xc8b38e74, 0xb475f255, 0x46fcd9b9,
 219         0x7aeb2661, 0x8b1ddf84, 0x846a0e79, 0x915f95e2,
 220         0x466e598e, 0x20b45770, 0x8cd55591, 0xc902de4c,
 221         0xb90bace1, 0xbb8205d0, 0x11a86248, 0x7574a99e,
 222         0xb77f19b6, 0xe0a9dc09, 0x662d09a1, 0xc4324633,
 223         0xe85a1f02, 0x09f0be8c, 0x4a99a025, 0x1d6efe10,
 224         0x1ab93d1d, 0x0ba5a4df, 0xa186f20f, 0x2868f169,
 225         0xdcb7da83, 0x573906fe, 0xa1e2ce9b, 0x4fcd7f52,
 226         0x50115e01, 0xa70683fa, 0xa002b5c4, 0x0de6d027,
 227         0x9af88c27, 0x773f8641, 0xc3604c06, 0x61a806b5,
 228         0xf0177a28, 0xc0f586e0, 0x006058aa, 0x30dc7d62,
 229         0x11e69ed7, 0x2338ea63, 0x53c2dd94, 0xc2c21634,
 230         0xbbcbee56, 0x90bcb6de, 0xebfc7da1, 0xce591d76,
 231         0x6f05e409, 0x4b7c0188, 0x39720a3d, 0x7c927c24,
 232         0x86e3725f, 0x724d9db9, 0x1ac15bb4, 0xd39eb8fc,
 233         0xed545578, 0x08fca5b5, 0xd83d7cd3, 0x4dad0fc4,
 234         0x1e50ef5e, 0xb161e6f8, 0xa28514d9, 0x6c51133c,
 235         0x6fd5c7e7, 0x56e14ec4, 0x362abfce, 0xddc6c837,
 236         0xd79a3234, 0x92638212, 0x670efa8e, 0x406000e0,
 237         0x3a39ce37, 0xd3faf5cf, 0xabc27737, 0x5ac52d1b,
 238         0x5cb0679e, 0x4fa33742, 0xd3822740, 0x99bc9bbe,
 239         0xd5118e9d, 0xbf0f7315, 0xd62d1c7e, 0xc700c47b,
 240         0xb78c1b6b, 0x21a19045, 0xb26eb1be, 0x6a366eb4,
 241         0x5748ab2f, 0xbc946e79, 0xc6a376d2, 0x6549c2c8,
 242         0x530ff8ee, 0x468dde7d, 0xd5730a1d, 0x4cd04dc6,
 243         0x2939bbdb, 0xa9ba4650, 0xac9526e8, 0xbe5ee304,
 244         0xa1fad5f0, 0x6a2d519a, 0x63ef8ce2, 0x9a86ee22,
 245         0xc089c2b8, 0x43242ef6, 0xa51e03aa, 0x9cf2d0a4,
 246         0x83c061ba, 0x9be96a4d, 0x8fe51550, 0xba645bd6,
 247         0x2826a2f9, 0xa73a3ae1, 0x4ba99586, 0xef5562e9,
 248         0xc72fefd3, 0xf752f7da, 0x3f046f69, 0x77fa0a59,
 249         0x80e4a915, 0x87b08601, 0x9b09e6ad, 0x3b3ee593,
 250         0xe990fd5a, 0x9e34d797, 0x2cf0b7d9, 0x022b8b51,
 251         0x96d5ac3a, 0x017da67d, 0xd1cf3ed6, 0x7c7d2d28,
 252         0x1f9f25cf, 0xadf2b89b, 0x5ad6b472, 0x5a88f54c,
 253         0xe029ac71, 0xe019a5e6, 0x47b0acfd, 0xed93fa9b,
 254         0xe8d3c48d, 0x283b57cc, 0xf8d56629, 0x79132e28,
 255         0x785f0191, 0xed756055, 0xf7960e44, 0xe3d35e8c,
 256         0x15056dd4, 0x88f46dba, 0x03a16125, 0x0564f0bd,
 257         0xc3eb9e15, 0x3c9057a2, 0x97271aec, 0xa93a072a,
 258         0x1b3f6d9b, 0x1e6321f5, 0xf59c66fb, 0x26dcf319,
 259         0x7533d928, 0xb155fdf5, 0x03563482, 0x8aba3cbb,
 260         0x28517711, 0xc20ad9f8, 0xabcc5167, 0xccad925f,
 261         0x4de81751, 0x3830dc8e, 0x379d5862, 0x9320f991,
 262         0xea7a90c2, 0xfb3e7bce, 0x5121ce64, 0x774fbe32,
 263         0xa8b6e37e, 0xc3293d46, 0x48de5369, 0x6413e680,
 264         0xa2ae0810, 0xdd6db224, 0x69852dfd, 0x09072166,
 265         0xb39a460a, 0x6445c0dd, 0x586cdecf, 0x1c20c8ae,
 266         0x5bbef7dd, 0x1b588d40, 0xccd2017f, 0x6bb4e3bb,
 267         0xdda26a7e, 0x3a59ff45, 0x3e350a44, 0xbcb4cdd5,
 268         0x72eacea8, 0xfa6484bb, 0x8d6612ae, 0xbf3c6f47,
 269         0xd29be463, 0x542f5d9e, 0xaec2771b, 0xf64e6370,
 270         0x740e0d8d, 0xe75b1357, 0xf8721671, 0xaf537d5d,
 271         0x4040cb08, 0x4eb4e2cc, 0x34d2466a, 0x0115af84,
 272         0xe1b00428, 0x95983a1d, 0x06b89fb4, 0xce6ea048,
 273         0x6f3f3b82, 0x3520ab82, 0x011a1d4b, 0x277227f8,
 274         0x611560b1, 0xe7933fdc, 0xbb3a792b, 0x344525bd,
 275         0xa08839e1, 0x51ce794b, 0x2f32c9b7, 0xa01fbac9,
 276         0xe01cc87e, 0xbcc7d1f6, 0xcf0111c3, 0xa1e8aac7,
 277         0x1a908749, 0xd44fbd9a, 0xd0dadecb, 0xd50ada38,
 278         0x0339c32a, 0xc6913667, 0x8df9317c, 0xe0b12b4f,
 279         0xf79e59b7, 0x43f5bb3a, 0xf2d519ff, 0x27d9459c,
 280         0xbf97222c, 0x15e6fc2a, 0x0f91fc71, 0x9b941525,
 281         0xfae59361, 0xceb69ceb, 0xc2a86459, 0x12baa8d1,
 282         0xb6c1075e, 0xe3056a0c, 0x10d25065, 0xcb03a442,
 283         0xe0ec6e0e, 0x1698db3b, 0x4c98a0be, 0x3278e964,
 284         0x9f1f9532, 0xe0d392df, 0xd3a0342b, 0x8971f21e,
 285         0x1b0a7441, 0x4ba3348c, 0xc5be7120, 0xc37632d8,
 286         0xdf359f8d, 0x9b992f2e, 0xe60b6f47, 0x0fe3f11d,
 287         0xe54cda54, 0x1edad891, 0xce6279cf, 0xcd3e7e6f,
 288         0x1618b166, 0xfd2c1d05, 0x848fd2c5, 0xf6fb2299,
 289         0xf523f357, 0xa6327623, 0x93a83531, 0x56cccd02,
 290         0xacf08162, 0x5a75ebb5, 0x6e163697, 0x88d273cc,
 291         0xde966292, 0x81b949d0, 0x4c50901b, 0x71c65614,
 292         0xe6c6c7bd, 0x327a140a, 0x45e1d006, 0xc3f27b9a,
 293         0xc9aa53fd, 0x62a80f00, 0xbb25bfe2, 0x35bdd2f6,
 294         0x71126905, 0xb2040222, 0xb6cbcf7c, 0xcd769c2b,
 295         0x53113ec0, 0x1640e3d3, 0x38abbd60, 0x2547adf0,
 296         0xba38209c, 0xf746ce76, 0x77afa1c5, 0x20756060,
 297         0x85cbfe4e, 0x8ae88dd8, 0x7aaaf9b0, 0x4cf9aa7e,
 298         0x1948c25c, 0x02fb8a8c, 0x01c36ae4, 0xd6ebe1f9,
 299         0x90d4f869, 0xa65cdea0, 0x3f09252d, 0xc208e69f,
 300         0xb74e6132, 0xce77e25b, 0x578fdfe3, 0x3ac372e6,
 301 };
 302
 303 /*
 304  * Round loop unrolling macros, S is a pointer to a S-Box array
 305  * organized in 4 unsigned longs at a row.
 306  */
 307 #define GET32_3(x) (((x) & 0xff))
 308 #define GET32_2(x) (((x) >> (8)) & (0xff))
 309 #define GET32_1(x) (((x) >> (16)) & (0xff))
 310 #define GET32_0(x) (((x) >> (24)) & (0xff))
 311
 312 #define bf_F(x) (((S[GET32_0(x)] + S[256 + GET32_1(x)]) ^ \
 313           S[512 + GET32_2(x)]) + S[768 + GET32_3(x)])
 314
 315 #define ROUND(a, b, n)  b ^= P[n]; a ^= bf_F (b)
 316
 317 /*
 318  * The blowfish encipher, processes 64-bit blocks.
 319  * NOTE: This function MUSTN'T respect endianess
 320  */
 321 static void encrypt_block(struct bf_ctx *bctx, u32 *dst, u32 *src)
 322 {
 323         const u32 *P = bctx->p;
 324         const u32 *S = bctx->s;
 325         u32 yl = src[0];
 326         u32 yr = src[1];
 327
 328         ROUND(yr, yl, 0);
 329         ROUND(yl, yr, 1);
 330         ROUND(yr, yl, 2);
 331         ROUND(yl, yr, 3);
 332         ROUND(yr, yl, 4);
 333         ROUND(yl, yr, 5);
 334         ROUND(yr, yl, 6);
 335         ROUND(yl, yr, 7);
 336         ROUND(yr, yl, 8);
 337         ROUND(yl, yr, 9);
 338         ROUND(yr, yl, 10);
 339         ROUND(yl, yr, 11);
 340         ROUND(yr, yl, 12);
 341         ROUND(yl, yr, 13);
 342         ROUND(yr, yl, 14);
 343         ROUND(yl, yr, 15);
 344
 345         yl ^= P[16];
 346         yr ^= P[17];
 347
 348         dst[0] = yr;
 349         dst[1] = yl;
 350 }
 351
 352 static void bf_encrypt(void *ctx, u8 *dst, const u8 *src)
 353 {
 354         const __be32 *in_blk = (const __be32 *)src;
 355         __be32 *const out_blk = (__be32 *)dst;
 356         u32 in32[2], out32[2];
 357
 358         in32[0] = be32_to_cpu(in_blk[0]);
 359         in32[1] = be32_to_cpu(in_blk[1]);
 360         encrypt_block(ctx, out32, in32);
 361         out_blk[0] = cpu_to_be32(out32[0]);
 362         out_blk[1] = cpu_to_be32(out32[1]);
 363 }
 364
 365 static void bf_decrypt(void *ctx, u8 *dst, const u8 *src)
 366 {
 367         const __be32 *in_blk = (const __be32 *)src;
 368         __be32 *const out_blk = (__be32 *)dst;
 369         const u32 *P = ((struct bf_ctx *)ctx)->p;
 370         const u32 *S = ((struct bf_ctx *)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  * Calculates the blowfish S and P boxes for encryption and decryption.
 400  */
 401 static int bf_setkey(void *ctx, const u8 *key, unsigned int keylen, u32 *flags)
 402 {
 403         short i, j, count;
 404         u32 data[2], temp;
 405         u32 *P = ((struct bf_ctx *)ctx)->p;
 406         u32 *S = ((struct bf_ctx *)ctx)->s;
 407
 408         /* Copy the initialization s-boxes */
 409         for (i = 0, count = 0; i < 256; i++)
 410                 for (j = 0; j < 4; j++, count++)
 411                         S[count] = bf_sbox[count];
 412
 413         /* Set the p-boxes */
 414         for (i = 0; i < 16 + 2; i++)
 415                 P[i] = bf_pbox[i];
 416
 417         /* Actual subkey generation */
 418         for (j = 0, i = 0; i < 16 + 2; i++) {
 419                 temp = (((u32 )key[j] << 24) |
 420                         ((u32 )key[(j + 1) % keylen] << 16) |
 421                         ((u32 )key[(j + 2) % keylen] << 8) |
 422                         ((u32 )key[(j + 3) % keylen]));
 423
 424                 P[i] = P[i] ^ temp;
 425                 j = (j + 4) % keylen;
 426         }
 427
 428         data[0] = 0x00000000;
 429         data[1] = 0x00000000;
 430
 431         for (i = 0; i < 16 + 2; i += 2) {
 432                 encrypt_block((struct bf_ctx *)ctx, data, data);
 433
 434                 P[i] = data[0];
 435                 P[i + 1] = data[1];
 436         }
 437
 438         for (i = 0; i < 4; i++) {
 439                 for (j = 0, count = i * 256; j < 256; j += 2, count += 2) {
 440                         encrypt_block((struct bf_ctx *)ctx, data, data);
 441
 442                         S[count] = data[0];
 443                         S[count + 1] = data[1];
 444                 }
 445         }
 446
 447         /* Bruce says not to bother with the weak key check. */
 448         return 0;
 449 }
 450
 451 static struct crypto_alg alg = {
 452         .cra_name               =       "blowfish",
 453         .cra_flags              =       CRYPTO_ALG_TYPE_CIPHER,
 454         .cra_blocksize          =       BF_BLOCK_SIZE,
 455         .cra_ctxsize            =       sizeof(struct bf_ctx),
 456         .cra_alignmask          =       3,
 457         .cra_module             =       THIS_MODULE,
 458         .cra_list               =       LIST_HEAD_INIT(alg.cra_list),
 459         .cra_u                  =       { .cipher = {
 460         .cia_min_keysize        =       BF_MIN_KEY_SIZE,
 461         .cia_max_keysize        =       BF_MAX_KEY_SIZE,
 462         .cia_setkey             =       bf_setkey,
 463         .cia_encrypt            =       bf_encrypt,
 464         .cia_decrypt            =       bf_decrypt } }
 465 };
 466
 467 static int __init init(void)
 468 {
 469         return crypto_register_alg(&alg);
 470 }
 471
 472 static void __exit fini(void)
 473 {
 474         crypto_unregister_alg(&alg);
 475 }
 476
 477 module_init(init);
 478 module_exit(fini);
 479
 480 MODULE_LICENSE("GPL");
 481 MODULE_DESCRIPTION("Blowfish Cipher Algorithm");