linux/crypto/seed.c
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   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Cryptographic API.
   4 *
   5 * SEED Cipher Algorithm.
   6 *
   7 * Documentation of SEED can be found in RFC 4269.
   8 * Copyright (C) 2007 Korea Information Security Agency (KISA).
   9 */
  10
  11#include <linux/module.h>
  12#include <linux/init.h>
  13#include <linux/types.h>
  14#include <linux/errno.h>
  15#include <linux/crypto.h>
  16#include <asm/byteorder.h>
  17
  18#define SEED_NUM_KCONSTANTS     16
  19#define SEED_KEY_SIZE           16
  20#define SEED_BLOCK_SIZE         16
  21#define SEED_KEYSCHED_LEN       32
  22
  23/*
  24 * #define byte(x, nr) ((unsigned char)((x) >> (nr*8)))
  25 */
  26static inline u8
  27byte(const u32 x, const unsigned n)
  28{
  29        return x >> (n << 3);
  30}
  31
  32struct seed_ctx {
  33        u32 keysched[SEED_KEYSCHED_LEN];
  34};
  35
  36static const u32 SS0[256] = {
  37        0x2989a1a8, 0x05858184, 0x16c6d2d4, 0x13c3d3d0,
  38        0x14445054, 0x1d0d111c, 0x2c8ca0ac, 0x25052124,
  39        0x1d4d515c, 0x03434340, 0x18081018, 0x1e0e121c,
  40        0x11415150, 0x3cccf0fc, 0x0acac2c8, 0x23436360,
  41        0x28082028, 0x04444044, 0x20002020, 0x1d8d919c,
  42        0x20c0e0e0, 0x22c2e2e0, 0x08c8c0c8, 0x17071314,
  43        0x2585a1a4, 0x0f8f838c, 0x03030300, 0x3b4b7378,
  44        0x3b8bb3b8, 0x13031310, 0x12c2d2d0, 0x2ecee2ec,
  45        0x30407070, 0x0c8c808c, 0x3f0f333c, 0x2888a0a8,
  46        0x32023230, 0x1dcdd1dc, 0x36c6f2f4, 0x34447074,
  47        0x2ccce0ec, 0x15859194, 0x0b0b0308, 0x17475354,
  48        0x1c4c505c, 0x1b4b5358, 0x3d8db1bc, 0x01010100,
  49        0x24042024, 0x1c0c101c, 0x33437370, 0x18889098,
  50        0x10001010, 0x0cccc0cc, 0x32c2f2f0, 0x19c9d1d8,
  51        0x2c0c202c, 0x27c7e3e4, 0x32427270, 0x03838380,
  52        0x1b8b9398, 0x11c1d1d0, 0x06868284, 0x09c9c1c8,
  53        0x20406060, 0x10405050, 0x2383a3a0, 0x2bcbe3e8,
  54        0x0d0d010c, 0x3686b2b4, 0x1e8e929c, 0x0f4f434c,
  55        0x3787b3b4, 0x1a4a5258, 0x06c6c2c4, 0x38487078,
  56        0x2686a2a4, 0x12021210, 0x2f8fa3ac, 0x15c5d1d4,
  57        0x21416160, 0x03c3c3c0, 0x3484b0b4, 0x01414140,
  58        0x12425250, 0x3d4d717c, 0x0d8d818c, 0x08080008,
  59        0x1f0f131c, 0x19899198, 0x00000000, 0x19091118,
  60        0x04040004, 0x13435350, 0x37c7f3f4, 0x21c1e1e0,
  61        0x3dcdf1fc, 0x36467274, 0x2f0f232c, 0x27072324,
  62        0x3080b0b0, 0x0b8b8388, 0x0e0e020c, 0x2b8ba3a8,
  63        0x2282a2a0, 0x2e4e626c, 0x13839390, 0x0d4d414c,
  64        0x29496168, 0x3c4c707c, 0x09090108, 0x0a0a0208,
  65        0x3f8fb3bc, 0x2fcfe3ec, 0x33c3f3f0, 0x05c5c1c4,
  66        0x07878384, 0x14041014, 0x3ecef2fc, 0x24446064,
  67        0x1eced2dc, 0x2e0e222c, 0x0b4b4348, 0x1a0a1218,
  68        0x06060204, 0x21012120, 0x2b4b6368, 0x26466264,
  69        0x02020200, 0x35c5f1f4, 0x12829290, 0x0a8a8288,
  70        0x0c0c000c, 0x3383b3b0, 0x3e4e727c, 0x10c0d0d0,
  71        0x3a4a7278, 0x07474344, 0x16869294, 0x25c5e1e4,
  72        0x26062224, 0x00808080, 0x2d8da1ac, 0x1fcfd3dc,
  73        0x2181a1a0, 0x30003030, 0x37073334, 0x2e8ea2ac,
  74        0x36063234, 0x15051114, 0x22022220, 0x38083038,
  75        0x34c4f0f4, 0x2787a3a4, 0x05454144, 0x0c4c404c,
  76        0x01818180, 0x29c9e1e8, 0x04848084, 0x17879394,
  77        0x35053134, 0x0bcbc3c8, 0x0ecec2cc, 0x3c0c303c,
  78        0x31417170, 0x11011110, 0x07c7c3c4, 0x09898188,
  79        0x35457174, 0x3bcbf3f8, 0x1acad2d8, 0x38c8f0f8,
  80        0x14849094, 0x19495158, 0x02828280, 0x04c4c0c4,
  81        0x3fcff3fc, 0x09494148, 0x39093138, 0x27476364,
  82        0x00c0c0c0, 0x0fcfc3cc, 0x17c7d3d4, 0x3888b0b8,
  83        0x0f0f030c, 0x0e8e828c, 0x02424240, 0x23032320,
  84        0x11819190, 0x2c4c606c, 0x1bcbd3d8, 0x2484a0a4,
  85        0x34043034, 0x31c1f1f0, 0x08484048, 0x02c2c2c0,
  86        0x2f4f636c, 0x3d0d313c, 0x2d0d212c, 0x00404040,
  87        0x3e8eb2bc, 0x3e0e323c, 0x3c8cb0bc, 0x01c1c1c0,
  88        0x2a8aa2a8, 0x3a8ab2b8, 0x0e4e424c, 0x15455154,
  89        0x3b0b3338, 0x1cccd0dc, 0x28486068, 0x3f4f737c,
  90        0x1c8c909c, 0x18c8d0d8, 0x0a4a4248, 0x16465254,
  91        0x37477374, 0x2080a0a0, 0x2dcde1ec, 0x06464244,
  92        0x3585b1b4, 0x2b0b2328, 0x25456164, 0x3acaf2f8,
  93        0x23c3e3e0, 0x3989b1b8, 0x3181b1b0, 0x1f8f939c,
  94        0x1e4e525c, 0x39c9f1f8, 0x26c6e2e4, 0x3282b2b0,
  95        0x31013130, 0x2acae2e8, 0x2d4d616c, 0x1f4f535c,
  96        0x24c4e0e4, 0x30c0f0f0, 0x0dcdc1cc, 0x08888088,
  97        0x16061214, 0x3a0a3238, 0x18485058, 0x14c4d0d4,
  98        0x22426260, 0x29092128, 0x07070304, 0x33033330,
  99        0x28c8e0e8, 0x1b0b1318, 0x05050104, 0x39497178,
 100        0x10809090, 0x2a4a6268, 0x2a0a2228, 0x1a8a9298,
 101};
 102
 103static const u32 SS1[256] = {
 104        0x38380830, 0xe828c8e0, 0x2c2d0d21, 0xa42686a2,
 105        0xcc0fcfc3, 0xdc1eced2, 0xb03383b3, 0xb83888b0,
 106        0xac2f8fa3, 0x60204060, 0x54154551, 0xc407c7c3,
 107        0x44044440, 0x6c2f4f63, 0x682b4b63, 0x581b4b53,
 108        0xc003c3c3, 0x60224262, 0x30330333, 0xb43585b1,
 109        0x28290921, 0xa02080a0, 0xe022c2e2, 0xa42787a3,
 110        0xd013c3d3, 0x90118191, 0x10110111, 0x04060602,
 111        0x1c1c0c10, 0xbc3c8cb0, 0x34360632, 0x480b4b43,
 112        0xec2fcfe3, 0x88088880, 0x6c2c4c60, 0xa82888a0,
 113        0x14170713, 0xc404c4c0, 0x14160612, 0xf434c4f0,
 114        0xc002c2c2, 0x44054541, 0xe021c1e1, 0xd416c6d2,
 115        0x3c3f0f33, 0x3c3d0d31, 0x8c0e8e82, 0x98188890,
 116        0x28280820, 0x4c0e4e42, 0xf436c6f2, 0x3c3e0e32,
 117        0xa42585a1, 0xf839c9f1, 0x0c0d0d01, 0xdc1fcfd3,
 118        0xd818c8d0, 0x282b0b23, 0x64264662, 0x783a4a72,
 119        0x24270723, 0x2c2f0f23, 0xf031c1f1, 0x70324272,
 120        0x40024242, 0xd414c4d0, 0x40014141, 0xc000c0c0,
 121        0x70334373, 0x64274763, 0xac2c8ca0, 0x880b8b83,
 122        0xf437c7f3, 0xac2d8da1, 0x80008080, 0x1c1f0f13,
 123        0xc80acac2, 0x2c2c0c20, 0xa82a8aa2, 0x34340430,
 124        0xd012c2d2, 0x080b0b03, 0xec2ecee2, 0xe829c9e1,
 125        0x5c1d4d51, 0x94148490, 0x18180810, 0xf838c8f0,
 126        0x54174753, 0xac2e8ea2, 0x08080800, 0xc405c5c1,
 127        0x10130313, 0xcc0dcdc1, 0x84068682, 0xb83989b1,
 128        0xfc3fcff3, 0x7c3d4d71, 0xc001c1c1, 0x30310131,
 129        0xf435c5f1, 0x880a8a82, 0x682a4a62, 0xb03181b1,
 130        0xd011c1d1, 0x20200020, 0xd417c7d3, 0x00020202,
 131        0x20220222, 0x04040400, 0x68284860, 0x70314171,
 132        0x04070703, 0xd81bcbd3, 0x9c1d8d91, 0x98198991,
 133        0x60214161, 0xbc3e8eb2, 0xe426c6e2, 0x58194951,
 134        0xdc1dcdd1, 0x50114151, 0x90108090, 0xdc1cccd0,
 135        0x981a8a92, 0xa02383a3, 0xa82b8ba3, 0xd010c0d0,
 136        0x80018181, 0x0c0f0f03, 0x44074743, 0x181a0a12,
 137        0xe023c3e3, 0xec2ccce0, 0x8c0d8d81, 0xbc3f8fb3,
 138        0x94168692, 0x783b4b73, 0x5c1c4c50, 0xa02282a2,
 139        0xa02181a1, 0x60234363, 0x20230323, 0x4c0d4d41,
 140        0xc808c8c0, 0x9c1e8e92, 0x9c1c8c90, 0x383a0a32,
 141        0x0c0c0c00, 0x2c2e0e22, 0xb83a8ab2, 0x6c2e4e62,
 142        0x9c1f8f93, 0x581a4a52, 0xf032c2f2, 0x90128292,
 143        0xf033c3f3, 0x48094941, 0x78384870, 0xcc0cccc0,
 144        0x14150511, 0xf83bcbf3, 0x70304070, 0x74354571,
 145        0x7c3f4f73, 0x34350531, 0x10100010, 0x00030303,
 146        0x64244460, 0x6c2d4d61, 0xc406c6c2, 0x74344470,
 147        0xd415c5d1, 0xb43484b0, 0xe82acae2, 0x08090901,
 148        0x74364672, 0x18190911, 0xfc3ecef2, 0x40004040,
 149        0x10120212, 0xe020c0e0, 0xbc3d8db1, 0x04050501,
 150        0xf83acaf2, 0x00010101, 0xf030c0f0, 0x282a0a22,
 151        0x5c1e4e52, 0xa82989a1, 0x54164652, 0x40034343,
 152        0x84058581, 0x14140410, 0x88098981, 0x981b8b93,
 153        0xb03080b0, 0xe425c5e1, 0x48084840, 0x78394971,
 154        0x94178793, 0xfc3cccf0, 0x1c1e0e12, 0x80028282,
 155        0x20210121, 0x8c0c8c80, 0x181b0b13, 0x5c1f4f53,
 156        0x74374773, 0x54144450, 0xb03282b2, 0x1c1d0d11,
 157        0x24250521, 0x4c0f4f43, 0x00000000, 0x44064642,
 158        0xec2dcde1, 0x58184850, 0x50124252, 0xe82bcbe3,
 159        0x7c3e4e72, 0xd81acad2, 0xc809c9c1, 0xfc3dcdf1,
 160        0x30300030, 0x94158591, 0x64254561, 0x3c3c0c30,
 161        0xb43686b2, 0xe424c4e0, 0xb83b8bb3, 0x7c3c4c70,
 162        0x0c0e0e02, 0x50104050, 0x38390931, 0x24260622,
 163        0x30320232, 0x84048480, 0x68294961, 0x90138393,
 164        0x34370733, 0xe427c7e3, 0x24240420, 0xa42484a0,
 165        0xc80bcbc3, 0x50134353, 0x080a0a02, 0x84078783,
 166        0xd819c9d1, 0x4c0c4c40, 0x80038383, 0x8c0f8f83,
 167        0xcc0ecec2, 0x383b0b33, 0x480a4a42, 0xb43787b3,
 168};
 169
 170static const u32 SS2[256] = {
 171        0xa1a82989, 0x81840585, 0xd2d416c6, 0xd3d013c3,
 172        0x50541444, 0x111c1d0d, 0xa0ac2c8c, 0x21242505,
 173        0x515c1d4d, 0x43400343, 0x10181808, 0x121c1e0e,
 174        0x51501141, 0xf0fc3ccc, 0xc2c80aca, 0x63602343,
 175        0x20282808, 0x40440444, 0x20202000, 0x919c1d8d,
 176        0xe0e020c0, 0xe2e022c2, 0xc0c808c8, 0x13141707,
 177        0xa1a42585, 0x838c0f8f, 0x03000303, 0x73783b4b,
 178        0xb3b83b8b, 0x13101303, 0xd2d012c2, 0xe2ec2ece,
 179        0x70703040, 0x808c0c8c, 0x333c3f0f, 0xa0a82888,
 180        0x32303202, 0xd1dc1dcd, 0xf2f436c6, 0x70743444,
 181        0xe0ec2ccc, 0x91941585, 0x03080b0b, 0x53541747,
 182        0x505c1c4c, 0x53581b4b, 0xb1bc3d8d, 0x01000101,
 183        0x20242404, 0x101c1c0c, 0x73703343, 0x90981888,
 184        0x10101000, 0xc0cc0ccc, 0xf2f032c2, 0xd1d819c9,
 185        0x202c2c0c, 0xe3e427c7, 0x72703242, 0x83800383,
 186        0x93981b8b, 0xd1d011c1, 0x82840686, 0xc1c809c9,
 187        0x60602040, 0x50501040, 0xa3a02383, 0xe3e82bcb,
 188        0x010c0d0d, 0xb2b43686, 0x929c1e8e, 0x434c0f4f,
 189        0xb3b43787, 0x52581a4a, 0xc2c406c6, 0x70783848,
 190        0xa2a42686, 0x12101202, 0xa3ac2f8f, 0xd1d415c5,
 191        0x61602141, 0xc3c003c3, 0xb0b43484, 0x41400141,
 192        0x52501242, 0x717c3d4d, 0x818c0d8d, 0x00080808,
 193        0x131c1f0f, 0x91981989, 0x00000000, 0x11181909,
 194        0x00040404, 0x53501343, 0xf3f437c7, 0xe1e021c1,
 195        0xf1fc3dcd, 0x72743646, 0x232c2f0f, 0x23242707,
 196        0xb0b03080, 0x83880b8b, 0x020c0e0e, 0xa3a82b8b,
 197        0xa2a02282, 0x626c2e4e, 0x93901383, 0x414c0d4d,
 198        0x61682949, 0x707c3c4c, 0x01080909, 0x02080a0a,
 199        0xb3bc3f8f, 0xe3ec2fcf, 0xf3f033c3, 0xc1c405c5,
 200        0x83840787, 0x10141404, 0xf2fc3ece, 0x60642444,
 201        0xd2dc1ece, 0x222c2e0e, 0x43480b4b, 0x12181a0a,
 202        0x02040606, 0x21202101, 0x63682b4b, 0x62642646,
 203        0x02000202, 0xf1f435c5, 0x92901282, 0x82880a8a,
 204        0x000c0c0c, 0xb3b03383, 0x727c3e4e, 0xd0d010c0,
 205        0x72783a4a, 0x43440747, 0x92941686, 0xe1e425c5,
 206        0x22242606, 0x80800080, 0xa1ac2d8d, 0xd3dc1fcf,
 207        0xa1a02181, 0x30303000, 0x33343707, 0xa2ac2e8e,
 208        0x32343606, 0x11141505, 0x22202202, 0x30383808,
 209        0xf0f434c4, 0xa3a42787, 0x41440545, 0x404c0c4c,
 210        0x81800181, 0xe1e829c9, 0x80840484, 0x93941787,
 211        0x31343505, 0xc3c80bcb, 0xc2cc0ece, 0x303c3c0c,
 212        0x71703141, 0x11101101, 0xc3c407c7, 0x81880989,
 213        0x71743545, 0xf3f83bcb, 0xd2d81aca, 0xf0f838c8,
 214        0x90941484, 0x51581949, 0x82800282, 0xc0c404c4,
 215        0xf3fc3fcf, 0x41480949, 0x31383909, 0x63642747,
 216        0xc0c000c0, 0xc3cc0fcf, 0xd3d417c7, 0xb0b83888,
 217        0x030c0f0f, 0x828c0e8e, 0x42400242, 0x23202303,
 218        0x91901181, 0x606c2c4c, 0xd3d81bcb, 0xa0a42484,
 219        0x30343404, 0xf1f031c1, 0x40480848, 0xc2c002c2,
 220        0x636c2f4f, 0x313c3d0d, 0x212c2d0d, 0x40400040,
 221        0xb2bc3e8e, 0x323c3e0e, 0xb0bc3c8c, 0xc1c001c1,
 222        0xa2a82a8a, 0xb2b83a8a, 0x424c0e4e, 0x51541545,
 223        0x33383b0b, 0xd0dc1ccc, 0x60682848, 0x737c3f4f,
 224        0x909c1c8c, 0xd0d818c8, 0x42480a4a, 0x52541646,
 225        0x73743747, 0xa0a02080, 0xe1ec2dcd, 0x42440646,
 226        0xb1b43585, 0x23282b0b, 0x61642545, 0xf2f83aca,
 227        0xe3e023c3, 0xb1b83989, 0xb1b03181, 0x939c1f8f,
 228        0x525c1e4e, 0xf1f839c9, 0xe2e426c6, 0xb2b03282,
 229        0x31303101, 0xe2e82aca, 0x616c2d4d, 0x535c1f4f,
 230        0xe0e424c4, 0xf0f030c0, 0xc1cc0dcd, 0x80880888,
 231        0x12141606, 0x32383a0a, 0x50581848, 0xd0d414c4,
 232        0x62602242, 0x21282909, 0x03040707, 0x33303303,
 233        0xe0e828c8, 0x13181b0b, 0x01040505, 0x71783949,
 234        0x90901080, 0x62682a4a, 0x22282a0a, 0x92981a8a,
 235};
 236
 237static const u32 SS3[256] = {
 238        0x08303838, 0xc8e0e828, 0x0d212c2d, 0x86a2a426,
 239        0xcfc3cc0f, 0xced2dc1e, 0x83b3b033, 0x88b0b838,
 240        0x8fa3ac2f, 0x40606020, 0x45515415, 0xc7c3c407,
 241        0x44404404, 0x4f636c2f, 0x4b63682b, 0x4b53581b,
 242        0xc3c3c003, 0x42626022, 0x03333033, 0x85b1b435,
 243        0x09212829, 0x80a0a020, 0xc2e2e022, 0x87a3a427,
 244        0xc3d3d013, 0x81919011, 0x01111011, 0x06020406,
 245        0x0c101c1c, 0x8cb0bc3c, 0x06323436, 0x4b43480b,
 246        0xcfe3ec2f, 0x88808808, 0x4c606c2c, 0x88a0a828,
 247        0x07131417, 0xc4c0c404, 0x06121416, 0xc4f0f434,
 248        0xc2c2c002, 0x45414405, 0xc1e1e021, 0xc6d2d416,
 249        0x0f333c3f, 0x0d313c3d, 0x8e828c0e, 0x88909818,
 250        0x08202828, 0x4e424c0e, 0xc6f2f436, 0x0e323c3e,
 251        0x85a1a425, 0xc9f1f839, 0x0d010c0d, 0xcfd3dc1f,
 252        0xc8d0d818, 0x0b23282b, 0x46626426, 0x4a72783a,
 253        0x07232427, 0x0f232c2f, 0xc1f1f031, 0x42727032,
 254        0x42424002, 0xc4d0d414, 0x41414001, 0xc0c0c000,
 255        0x43737033, 0x47636427, 0x8ca0ac2c, 0x8b83880b,
 256        0xc7f3f437, 0x8da1ac2d, 0x80808000, 0x0f131c1f,
 257        0xcac2c80a, 0x0c202c2c, 0x8aa2a82a, 0x04303434,
 258        0xc2d2d012, 0x0b03080b, 0xcee2ec2e, 0xc9e1e829,
 259        0x4d515c1d, 0x84909414, 0x08101818, 0xc8f0f838,
 260        0x47535417, 0x8ea2ac2e, 0x08000808, 0xc5c1c405,
 261        0x03131013, 0xcdc1cc0d, 0x86828406, 0x89b1b839,
 262        0xcff3fc3f, 0x4d717c3d, 0xc1c1c001, 0x01313031,
 263        0xc5f1f435, 0x8a82880a, 0x4a62682a, 0x81b1b031,
 264        0xc1d1d011, 0x00202020, 0xc7d3d417, 0x02020002,
 265        0x02222022, 0x04000404, 0x48606828, 0x41717031,
 266        0x07030407, 0xcbd3d81b, 0x8d919c1d, 0x89919819,
 267        0x41616021, 0x8eb2bc3e, 0xc6e2e426, 0x49515819,
 268        0xcdd1dc1d, 0x41515011, 0x80909010, 0xccd0dc1c,
 269        0x8a92981a, 0x83a3a023, 0x8ba3a82b, 0xc0d0d010,
 270        0x81818001, 0x0f030c0f, 0x47434407, 0x0a12181a,
 271        0xc3e3e023, 0xcce0ec2c, 0x8d818c0d, 0x8fb3bc3f,
 272        0x86929416, 0x4b73783b, 0x4c505c1c, 0x82a2a022,
 273        0x81a1a021, 0x43636023, 0x03232023, 0x4d414c0d,
 274        0xc8c0c808, 0x8e929c1e, 0x8c909c1c, 0x0a32383a,
 275        0x0c000c0c, 0x0e222c2e, 0x8ab2b83a, 0x4e626c2e,
 276        0x8f939c1f, 0x4a52581a, 0xc2f2f032, 0x82929012,
 277        0xc3f3f033, 0x49414809, 0x48707838, 0xccc0cc0c,
 278        0x05111415, 0xcbf3f83b, 0x40707030, 0x45717435,
 279        0x4f737c3f, 0x05313435, 0x00101010, 0x03030003,
 280        0x44606424, 0x4d616c2d, 0xc6c2c406, 0x44707434,
 281        0xc5d1d415, 0x84b0b434, 0xcae2e82a, 0x09010809,
 282        0x46727436, 0x09111819, 0xcef2fc3e, 0x40404000,
 283        0x02121012, 0xc0e0e020, 0x8db1bc3d, 0x05010405,
 284        0xcaf2f83a, 0x01010001, 0xc0f0f030, 0x0a22282a,
 285        0x4e525c1e, 0x89a1a829, 0x46525416, 0x43434003,
 286        0x85818405, 0x04101414, 0x89818809, 0x8b93981b,
 287        0x80b0b030, 0xc5e1e425, 0x48404808, 0x49717839,
 288        0x87939417, 0xccf0fc3c, 0x0e121c1e, 0x82828002,
 289        0x01212021, 0x8c808c0c, 0x0b13181b, 0x4f535c1f,
 290        0x47737437, 0x44505414, 0x82b2b032, 0x0d111c1d,
 291        0x05212425, 0x4f434c0f, 0x00000000, 0x46424406,
 292        0xcde1ec2d, 0x48505818, 0x42525012, 0xcbe3e82b,
 293        0x4e727c3e, 0xcad2d81a, 0xc9c1c809, 0xcdf1fc3d,
 294        0x00303030, 0x85919415, 0x45616425, 0x0c303c3c,
 295        0x86b2b436, 0xc4e0e424, 0x8bb3b83b, 0x4c707c3c,
 296        0x0e020c0e, 0x40505010, 0x09313839, 0x06222426,
 297        0x02323032, 0x84808404, 0x49616829, 0x83939013,
 298        0x07333437, 0xc7e3e427, 0x04202424, 0x84a0a424,
 299        0xcbc3c80b, 0x43535013, 0x0a02080a, 0x87838407,
 300        0xc9d1d819, 0x4c404c0c, 0x83838003, 0x8f838c0f,
 301        0xcec2cc0e, 0x0b33383b, 0x4a42480a, 0x87b3b437,
 302};
 303
 304static const u32 KC[SEED_NUM_KCONSTANTS] = {
 305        0x9e3779b9, 0x3c6ef373, 0x78dde6e6, 0xf1bbcdcc,
 306        0xe3779b99, 0xc6ef3733, 0x8dde6e67, 0x1bbcdccf,
 307        0x3779b99e, 0x6ef3733c, 0xdde6e678, 0xbbcdccf1,
 308        0x779b99e3, 0xef3733c6, 0xde6e678d, 0xbcdccf1b,
 309};
 310
 311#define OP(X1, X2, X3, X4, rbase)                       \
 312        t0 = X3 ^ ks[rbase];                            \
 313        t1 = X4 ^ ks[rbase+1];                          \
 314        t1 ^= t0;                                       \
 315        t1 = SS0[byte(t1, 0)] ^ SS1[byte(t1, 1)] ^      \
 316                SS2[byte(t1, 2)] ^ SS3[byte(t1, 3)];    \
 317        t0 += t1;                                       \
 318        t0 = SS0[byte(t0, 0)] ^ SS1[byte(t0, 1)] ^      \
 319                SS2[byte(t0, 2)] ^ SS3[byte(t0, 3)];    \
 320        t1 += t0;                                       \
 321        t1 = SS0[byte(t1, 0)] ^ SS1[byte(t1, 1)] ^      \
 322                SS2[byte(t1, 2)] ^ SS3[byte(t1, 3)];    \
 323        t0 += t1;                                       \
 324        X1 ^= t0;                                       \
 325        X2 ^= t1
 326
 327static int seed_set_key(struct crypto_tfm *tfm, const u8 *in_key,
 328                        unsigned int key_len)
 329{
 330        struct seed_ctx *ctx = crypto_tfm_ctx(tfm);
 331        u32 *keyout = ctx->keysched;
 332        const __be32 *key = (const __be32 *)in_key;
 333        u32 i, t0, t1, x1, x2, x3, x4;
 334
 335        x1 = be32_to_cpu(key[0]);
 336        x2 = be32_to_cpu(key[1]);
 337        x3 = be32_to_cpu(key[2]);
 338        x4 = be32_to_cpu(key[3]);
 339
 340        for (i = 0; i < SEED_NUM_KCONSTANTS; i++) {
 341                t0 = x1 + x3 - KC[i];
 342                t1 = x2 + KC[i] - x4;
 343                *(keyout++) = SS0[byte(t0, 0)] ^ SS1[byte(t0, 1)] ^
 344                                SS2[byte(t0, 2)] ^ SS3[byte(t0, 3)];
 345                *(keyout++) = SS0[byte(t1, 0)] ^ SS1[byte(t1, 1)] ^
 346                                SS2[byte(t1, 2)] ^ SS3[byte(t1, 3)];
 347
 348                if (i % 2 == 0) {
 349                        t0 = x1;
 350                        x1 = (x1 >> 8) ^ (x2 << 24);
 351                        x2 = (x2 >> 8) ^ (t0 << 24);
 352                } else {
 353                        t0 = x3;
 354                        x3 = (x3 << 8) ^ (x4 >> 24);
 355                        x4 = (x4 << 8) ^ (t0 >> 24);
 356                }
 357        }
 358
 359        return 0;
 360}
 361
 362/* encrypt a block of text */
 363
 364static void seed_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
 365{
 366        const struct seed_ctx *ctx = crypto_tfm_ctx(tfm);
 367        const __be32 *src = (const __be32 *)in;
 368        __be32 *dst = (__be32 *)out;
 369        u32 x1, x2, x3, x4, t0, t1;
 370        const u32 *ks = ctx->keysched;
 371
 372        x1 = be32_to_cpu(src[0]);
 373        x2 = be32_to_cpu(src[1]);
 374        x3 = be32_to_cpu(src[2]);
 375        x4 = be32_to_cpu(src[3]);
 376
 377        OP(x1, x2, x3, x4, 0);
 378        OP(x3, x4, x1, x2, 2);
 379        OP(x1, x2, x3, x4, 4);
 380        OP(x3, x4, x1, x2, 6);
 381        OP(x1, x2, x3, x4, 8);
 382        OP(x3, x4, x1, x2, 10);
 383        OP(x1, x2, x3, x4, 12);
 384        OP(x3, x4, x1, x2, 14);
 385        OP(x1, x2, x3, x4, 16);
 386        OP(x3, x4, x1, x2, 18);
 387        OP(x1, x2, x3, x4, 20);
 388        OP(x3, x4, x1, x2, 22);
 389        OP(x1, x2, x3, x4, 24);
 390        OP(x3, x4, x1, x2, 26);
 391        OP(x1, x2, x3, x4, 28);
 392        OP(x3, x4, x1, x2, 30);
 393
 394        dst[0] = cpu_to_be32(x3);
 395        dst[1] = cpu_to_be32(x4);
 396        dst[2] = cpu_to_be32(x1);
 397        dst[3] = cpu_to_be32(x2);
 398}
 399
 400/* decrypt a block of text */
 401
 402static void seed_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
 403{
 404        const struct seed_ctx *ctx = crypto_tfm_ctx(tfm);
 405        const __be32 *src = (const __be32 *)in;
 406        __be32 *dst = (__be32 *)out;
 407        u32 x1, x2, x3, x4, t0, t1;
 408        const u32 *ks = ctx->keysched;
 409
 410        x1 = be32_to_cpu(src[0]);
 411        x2 = be32_to_cpu(src[1]);
 412        x3 = be32_to_cpu(src[2]);
 413        x4 = be32_to_cpu(src[3]);
 414
 415        OP(x1, x2, x3, x4, 30);
 416        OP(x3, x4, x1, x2, 28);
 417        OP(x1, x2, x3, x4, 26);
 418        OP(x3, x4, x1, x2, 24);
 419        OP(x1, x2, x3, x4, 22);
 420        OP(x3, x4, x1, x2, 20);
 421        OP(x1, x2, x3, x4, 18);
 422        OP(x3, x4, x1, x2, 16);
 423        OP(x1, x2, x3, x4, 14);
 424        OP(x3, x4, x1, x2, 12);
 425        OP(x1, x2, x3, x4, 10);
 426        OP(x3, x4, x1, x2, 8);
 427        OP(x1, x2, x3, x4, 6);
 428        OP(x3, x4, x1, x2, 4);
 429        OP(x1, x2, x3, x4, 2);
 430        OP(x3, x4, x1, x2, 0);
 431
 432        dst[0] = cpu_to_be32(x3);
 433        dst[1] = cpu_to_be32(x4);
 434        dst[2] = cpu_to_be32(x1);
 435        dst[3] = cpu_to_be32(x2);
 436}
 437
 438
 439static struct crypto_alg seed_alg = {
 440        .cra_name               =       "seed",
 441        .cra_driver_name        =       "seed-generic",
 442        .cra_priority           =       100,
 443        .cra_flags              =       CRYPTO_ALG_TYPE_CIPHER,
 444        .cra_blocksize          =       SEED_BLOCK_SIZE,
 445        .cra_ctxsize            =       sizeof(struct seed_ctx),
 446        .cra_alignmask          =       3,
 447        .cra_module             =       THIS_MODULE,
 448        .cra_u                  =       {
 449                .cipher = {
 450                        .cia_min_keysize        =       SEED_KEY_SIZE,
 451                        .cia_max_keysize        =       SEED_KEY_SIZE,
 452                        .cia_setkey             =       seed_set_key,
 453                        .cia_encrypt            =       seed_encrypt,
 454                        .cia_decrypt            =       seed_decrypt
 455                }
 456        }
 457};
 458
 459static int __init seed_init(void)
 460{
 461        return crypto_register_alg(&seed_alg);
 462}
 463
 464static void __exit seed_fini(void)
 465{
 466        crypto_unregister_alg(&seed_alg);
 467}
 468
 469subsys_initcall(seed_init);
 470module_exit(seed_fini);
 471
 472MODULE_DESCRIPTION("SEED Cipher Algorithm");
 473MODULE_LICENSE("GPL");
 474MODULE_AUTHOR("Hye-Shik Chang <perky@FreeBSD.org>, Kim Hyun <hkim@kisa.or.kr>");
 475MODULE_ALIAS_CRYPTO("seed");
 476
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