README.LSB


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OE-Core aims to be able to provide basic LSB compatible images. There
are some challenges for OE as LSB isn't always 100% relevant to its
target embedded and IoT audiences. 

One challenge is that the LSB spec is no longer being actively
developed [https://github.com/LinuxStandardBase/lsb] and has 
components which are end of life or significantly dated. OE 
therefore provides compatibility with the following caveats:

* Qt4 is provided by the separate meta-qt4 layer. Its noted that Qt4 
  is end of life and this isn't something the core project regularly 
  tests any longer. Users are recommended to group together to support
  maintenance of that layer. [http://git.yoctoproject.org/cgit/cgit.cgi/meta-qt4/]

* mailx has been dropped since its no longer being developed upstream 
  and there are better, more modern replacements such as s-nail 
  (http://sdaoden.eu/code.html) or mailutils (http://mailutils.org/).

* A few perl modules that were required by LSB 4.x aren't provided:
  libclass-isa, libenv, libdumpvalue, libfile-checktree,
  libi18n-collate, libpod-plainer.

* libpng 1.2 isn't provided; oe-core includes the latest release of libpng
  instead.

* pax (POSIX standard archive) tool is not provided.
/*
 * Cryptographic API.
 *
 * SEED Cipher Algorithm.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Documentation of SEED can be found in RFC 4269.
 * Copyright (C) 2007 Korea Information Security Agency (KISA).
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/crypto.h>
#include <asm/byteorder.h>

#define SEED_NUM_KCONSTANTS	16
#define SEED_KEY_SIZE		16
#define SEED_BLOCK_SIZE		16
#define SEED_KEYSCHED_LEN	32

/*
 * #define byte(x, nr) ((unsigned char)((x) >> (nr*8)))
 */
static inline u8
byte(const u32 x, const unsigned n)
{
	return x >> (n << 3);
}

struct seed_ctx {
	u32 keysched[SEED_KEYSCHED_LEN];
};

static const u32 SS0[256] = {
	0x2989a1a8, 0x05858184, 0x16c6d2d4, 0x13c3d3d0,
	0x14445054, 0x1d0d111c, 0x2c8ca0ac, 0x25052124,
	0x1d4d515c, 0x03434340, 0x18081018, 0x1e0e121c,
	0x11415150, 0x3cccf0fc, 0x0acac2c8, 0x23436360,
	0x28082028, 0x04444044, 0x20002020, 0x1d8d919c,
	0x20c0e0e0, 0x22c2e2e0, 0x08c8c0c8, 0x17071314,
	0x2585a1a4, 0x0f8f838c, 0x03030300, 0x3b4b7378,
	0x3b8bb3b8, 0x13031310, 0x12c2d2d0, 0x2ecee2ec,
	0x30407070, 0x0c8c808c, 0x3f0f333c, 0x2888a0a8,
	0x32023230, 0x1dcdd1dc, 0x36c6f2f4, 0x34447074,
	0x2ccce0ec, 0x15859194, 0x0b0b0308, 0x17475354,
	0x1c4c505c, 0x1b4b5358, 0x3d8db1bc, 0x01010100,
	0x24042024, 0x1c0c101c, 0x33437370, 0x18889098,
	0x10001010, 0x0cccc0cc, 0x32c2f2f0, 0x19c9d1d8,
	0x2c0c202c, 0x27c7e3e4, 0x32427270, 0x03838380,
	0x1b8b9398, 0x11c1d1d0, 0x06868284, 0x09c9c1c8,
	0x20406060, 0x10405050, 0x2383a3a0, 0x2bcbe3e8,
	0x0d0d010c, 0x3686b2b4, 0x1e8e929c, 0x0f4f434c,
	0x3787b3b4, 0x1a4a5258, 0x06c6c2c4, 0x38487078,
	0x2686a2a4, 0x12021210, 0x2f8fa3ac, 0x15c5d1d4,
	0x21416160, 0x03c3c3c0, 0x3484b0b4, 0x01414140,
	0x12425250, 0x3d4d717c, 0x0d8d818c, 0x08080008,
	0x1f0f131c, 0x19899198, 0x00000000, 0x19091118,
	0x04040004, 0x13435350, 0x37c7f3f4, 0x21c1e1e0,
	0x3dcdf1fc, 0x36467274, 0x2f0f232c, 0x27072324,
	0x3080b0b0, 0x0b8b8388, 0x0e0e020c, 0x2b8ba3a8,
	0x2282a2a0, 0x2e4e626c, 0x13839390, 0x0d4d414c,
	0x29496168, 0x3c4c707c, 0x09090108, 0x0a0a0208,
	0x3f8fb3bc, 0x2fcfe3ec, 0x33c3f3f0, 0x05c5c1c4,
	0x07878384, 0x14041014, 0x3ecef2fc, 0x24446064,
	0x1eced2dc, 0x2e0e222c, 0x0b4b4348, 0x1a0a1218,
	0x06060204, 0x21012120, 0x2b4b6368, 0x26466264,
	0x02020200, 0x35c5f1f4, 0x12829290, 0x0a8a8288,
	0x0c0c000c, 0x3383b3b0, 0x3e4e727c, 0x10c0d0d0,
	0x3a4a7278, 0x07474344, 0x16869294, 0x25c5e1e4,
	0x26062224, 0x00808080, 0x2d8da1ac, 0x1fcfd3dc,
	0x2181a1a0, 0x30003030, 0x37073334, 0x2e8ea2ac,
	0x36063234, 0x15051114, 0x22022220, 0x38083038,
	0x34c4f0f4, 0x2787a3a4, 0x05454144, 0x0c4c404c,
	0x01818180, 0x29c9e1e8, 0x04848084, 0x17879394,
	0x35053134, 0x0bcbc3c8, 0x0ecec2cc, 0x3c0c303c,
	0x31417170, 0x11011110, 0x07c7c3c4, 0x09898188,
	0x35457174, 0x3bcbf3f8, 0x1acad2d8, 0x38c8f0f8,
	0x14849094, 0x19495158, 0x02828280, 0x04c4c0c4,
	0x3fcff3fc, 0x09494148, 0x39093138, 0x27476364,
	0x00c0c0c0, 0x0fcfc3cc, 0x17c7d3d4, 0x3888b0b8,
	0x0f0f030c, 0x0e8e828c, 0x02424240, 0x23032320,
	0x11819190, 0x2c4c606c, 0x1bcbd3d8, 0x2484a0a4,
	0x34043034, 0x31c1f1f0, 0x08484048, 0x02c2c2c0,
	0x2f4f636c, 0x3d0d313c, 0x2d0d212c, 0x00404040,
	0x3e8eb2bc, 0x3e0e323c, 0x3c8cb0bc, 0x01c1c1c0,
	0x2a8aa2a8, 0x3a8ab2b8, 0x0e4e424c, 0x15455154,
	0x3b0b3338, 0x1cccd0dc, 0x28486068, 0x3f4f737c,
	0x1c8c909c, 0x18c8d0d8, 0x0a4a4248, 0x16465254,
	0x37477374, 0x2080a0a0, 0x2dcde1ec, 0x06464244,
	0x3585b1b4, 0x2b0b2328, 0x25456164, 0x3acaf2f8,
	0x23c3e3e0, 0x3989b1b8, 0x3181b1b0, 0x1f8f939c,
	0x1e4e525c, 0x39c9f1f8, 0x26c6e2e4, 0x3282b2b0,
	0x31013130, 0x2acae2e8, 0x2d4d616c, 0x1f4f535c,
	0x24c4e0e4, 0x30c0f0f0, 0x0dcdc1cc, 0x08888088,
	0x16061214, 0x3a0a3238, 0x18485058, 0x14c4d0d4,
	0x22426260, 0x29092128, 0x07070304, 0x33033330,
	0x28c8e0e8, 0x1b0b1318, 0x05050104, 0x39497178,
	0x10809090, 0x2a4a6268, 0x2a0a2228, 0x1a8a9298,
};

static const u32 SS1[256] = {
	0x38380830, 0xe828c8e0, 0x2c2d0d21, 0xa42686a2,
	0xcc0fcfc3, 0xdc1eced2, 0xb03383b3, 0xb83888b0,
	0xac2f8fa3, 0x60204060, 0x54154551, 0xc407c7c3,
	0x44044440, 0x6c2f4f63, 0x682b4b63, 0x581b4b53,
	0xc003c3c3, 0x60224262, 0x30330333, 0xb43585b1,
	0x28290921, 0xa02080a0, 0xe022c2e2, 0xa42787a3,
	0xd013c3d3, 0x90118191, 0x10110111, 0x04060602,
	0x1c1c0c10, 0xbc3c8cb0, 0x34360632, 0x480b4b43,
	0xec2fcfe3, 0x88088880, 0x6c2c4c60, 0xa82888a0,
	0x14170713, 0xc404c4c0, 0x14160612, 0xf434c4f0,
	0xc002c2c2, 0x44054541, 0xe021c1e1, 0xd416c6d2,
	0x3c3f0f33, 0x3c3d0d31, 0x8c0e8e82, 0x98188890,
	0x28280820, 0x4c0e4e42, 0xf436c6f2, 0x3c3e0e32,
	0xa42585a1, 0xf839c9f1, 0x0c0d0d01, 0xdc1fcfd3,
	0xd818c8d0, 0x282b0b23, 0x64264662, 0x783a4a72,
	0x24270723, 0x2c2f0f23, 0xf031c1f1, 0x70324272,
	0x40024242, 0xd414c4d0, 0x40014141, 0xc000c0c0,
	0x70334373, 0x64274763, 0xac2c8ca0, 0x880b8b83,
	0xf437c7f3, 0xac2d8da1, 0x80008080, 0x1c1f0f13,
	0xc80acac2, 0x2c2c0c20, 0xa82a8aa2, 0x34340430,
	0xd012c2d2, 0x080b0b03, 0xec2ecee2, 0xe829c9e1,
	0x5c1d4d51, 0x94148490, 0x18180810, 0xf838c8f0,
	0x54174753, 0xac2e8ea2, 0x08080800, 0xc405c5c1,
	0x10130313, 0xcc0dcdc1, 0x84068682, 0xb83989b1,
	0xfc3fcff3, 0x7c3d4d71, 0xc001c1c1, 0x30310131,
	0xf435c5f1, 0x880a8a82, 0x682a4a62, 0xb03181b1,
	0xd011c1d1, 0x20200020, 0xd417c7d3, 0x00020202,
	0x20220222, 0x04040400, 0x68284860, 0x70314171,
	0x04070703, 0xd81bcbd3, 0x9c1d8d91, 0x98198991,
	0x60214161, 0xbc3e8eb2, 0xe426c6e2, 0x58194951,
	0xdc1dcdd1, 0x50114151, 0x90108090, 0xdc1cccd0,
	0x981a8a92, 0xa02383a3, 0xa82b8ba3, 0xd010c0d0,
	0x80018181, 0x0c0f0f03, 0x44074743, 0x181a0a12,
	0xe023c3e3, 0xec2ccce0, 0x8c0d8d81, 0xbc3f8fb3,
	0x94168692, 0x783b4b73, 0x5c1c4c50, 0xa02282a2,
	0xa02181a1, 0x60234363, 0x20230323, 0x4c0d4d41,
	0xc808c8c0, 0x9c1e8e92, 0x9c1c8c90, 0x383a0a32,
	0x0c0c0c00, 0x2c2e0e22, 0xb83a8ab2, 0x6c2e4e62,
	0x9c1f8f93, 0x581a4a52, 0xf032c2f2, 0x90128292,
	0xf033c3f3, 0x48094941, 0x78384870, 0xcc0cccc0,
	0x14150511, 0xf83bcbf3, 0x70304070, 0x74354571,
	0x7c3f4f73, 0x34350531, 0x10100010, 0x00030303,
	0x64244460, 0x6c2d4d61, 0xc406c6c2, 0x74344470,
	0xd415c5d1, 0xb43484b0, 0xe82acae2, 0x08090901,
	0x74364672, 0x18190911, 0xfc3ecef2, 0x40004040,
	0x10120212, 0xe020c0e0, 0xbc3d8db1, 0x04050501,
	0xf83acaf2, 0x00010101, 0xf030c0f0, 0x282a0a22,
	0x5c1e4e52, 0xa82989a1, 0x54164652, 0x40034343,
	0x84058581, 0x14140410, 0x88098981, 0x981b8b93,
	0xb03080b0, 0xe425c5e1, 0x48084840, 0x78394971,
	0x94178793, 0xfc3cccf0, 0x1c1e0e12, 0x80028282,
	0x20210121, 0x8c0c8c80, 0x181b0b13, 0x5c1f4f53,
	0x74374773, 0x54144450, 0xb03282b2, 0x1c1d0d11,
	0x24250521, 0x4c0f4f43, 0x00000000, 0x44064642,
	0xec2dcde1, 0x58184850, 0x50124252, 0xe82bcbe3,
	0x7c3e4e72, 0xd81acad2, 0xc809c9c1, 0xfc3dcdf1,
	0x30300030, 0x94158591, 0x64254561, 0x3c3c0c30,
	0xb43686b2, 0xe424c4e0, 0xb83b8bb3, 0x7c3c4c70,
	0x0c0e0e02, 0x50104050, 0x38390931, 0x24260622,
	0x30320232, 0x84048480, 0x68294961, 0x90138393,
	0x34370733, 0xe427c7e3, 0x24240420, 0xa42484a0,
	0xc80bcbc3, 0x50134353, 0x080a0a02, 0x84078783,
	0xd819c9d1, 0x4c0c4c40, 0x80038383, 0x8c0f8f83,
	0xcc0ecec2, 0x383b0b33, 0x480a4a42, 0xb43787b3,
};

static const u32 SS2[256] = {
	0xa1a82989, 0x81840585, 0xd2d416c6, 0xd3d013c3,
	0x50541444, 0x111c1d0d, 0xa0ac2c8c, 0x21242505,
	0x515c1d4d, 0x43400343, 0x10181808, 0x121c1e0e,
	0x51501141, 0xf0fc3ccc, 0xc2c80aca, 0x63602343,
	0x20282808, 0x40440444, 0x20202000, 0x919c1d8d,
	0xe0e020c0, 0xe2e022c2, 0xc0c808c8, 0x13141707,
	0xa1a42585, 0x838c0f8f, 0x03000303, 0x73783b4b,
	0xb3b83b8b, 0x13101303, 0xd2d012c2, 0xe2ec2ece,
	0x70703040, 0x808c0c8c, 0x333c3f0f, 0xa0a82888,
	0x32303202, 0xd1dc1dcd, 0xf2f436c6, 0x70743444,
	0xe0ec2ccc, 0x91941585, 0x03080b0b, 0x53541747,
	0x505c1c4c, 0x53581b4b, 0xb1bc3d8d, 0x01000101,
	0x20242404, 0x101c1c0c, 0x73703343, 0x90981888,
	0x10101000, 0xc0cc0ccc, 0xf2f032c2, 0xd1d819c9,
	0x202c2c0c, 0xe3e427c7, 0x72703242, 0x83800383,
	0x93981b8b, 0xd1d011c1, 0x82840686, 0xc1c809c9,
	0x60602040, 0x50501040, 0xa3a02383, 0xe3e82bcb,
	0x010c0d0d, 0xb2b43686, 0x929c1e8e, 0x434c0f4f,
	0xb3b43787, 0x52581a4a, 0xc2c406c6, 0x70783848,
	0xa2a42686, 0x12101202, 0xa3ac2f8f, 0xd1d415c5,
	0x61602141, 0xc3c003c3, 0xb0b43484, 0x41400141,
	0x52501242, 0x717c3d4d, 0x818c0d8d, 0x00080808,
	0x131c1f0f, 0x91981989, 0x00000000, 0x11181909,
	0x00040404, 0x53501343, 0xf3f437c7, 0xe1e021c1,
	0xf1fc3dcd, 0x72743646, 0x232c2f0f, 0x23242707,
	0xb0b03080, 0x83880b8b, 0x020c0e0e, 0xa3a82b8b,
	0xa2a02282, 0x626c2e4e, 0x93901383, 0x414c0d4d,
	0x61682949, 0x707c3c4c, 0x01080909, 0x02080a0a,
	0xb3bc3f8f, 0xe3ec2fcf, 0xf3f033c3, 0xc1c405c5,
	0x83840787, 0x10141404, 0xf2fc3ece, 0x60642444,
	0xd2dc1ece, 0x222c2e0e, 0x43480b4b, 0x12181a0a,
	0x02040606, 0x21202101, 0x63682b4b, 0x62642646,
	0x02000202, 0xf1f435c5, 0x92901282, 0x82880a8a,
	0x000c0c0c, 0xb3b03383, 0x727c3e4e, 0xd0d010c0,
	0x72783a4a, 0x43440747, 0x92941686, 0xe1e425c5,
	0x22242606, 0x80800080, 0xa1ac2d8d, 0xd3dc1fcf,
	0xa1a02181, 0x30303000, 0x33343707, 0xa2ac2e8e,
	0x32343606, 0x11141505, 0x22202202, 0x30383808,
	0xf0f434c4, 0xa3a42787, 0x41440545, 0x404c0c4c,
	0x81800181, 0xe1e829c9, 0x80840484, 0x93941787,
	0x31343505, 0xc3c80bcb, 0xc2cc0ece, 0x303c3c0c,
	0x71703141, 0x11101101, 0xc3c407c7, 0x81880989,
	0x71743545, 0xf3f83bcb, 0xd2d81aca, 0xf0f838c8,
	0x90941484, 0x51581949, 0x82800282, 0xc0c404c4,
	0xf3fc3fcf, 0x41480949, 0x31383909, 0x63642747,
	0xc0c000c0, 0xc3cc0fcf, 0xd3d417c7, 0xb0b83888,
	0x030c0f0f, 0x828c0e8e, 0x42400242, 0x23202303,
	0x91901181, 0x606c2c4c, 0xd3d81bcb, 0xa0a42484,
	0x30343404, 0xf1f031c1, 0x40480848, 0xc2c002c2,
	0x636c2f4f, 0x313c3d0d, 0x212c2d0d, 0x40400040,
	0xb2bc3e8e, 0x323c3e0e, 0xb0bc3c8c, 0xc1c001c1,
	0xa2a82a8a, 0xb2b83a8a, 0x424c0e4e, 0x51541545,
	0x33383b0b, 0xd0dc1ccc, 0x60682848, 0x737c3f4f,
	0x909c1c8c, 0xd0d818c8, 0x42480a4a, 0x52541646,
	0x73743747, 0xa0a02080, 0xe1ec2dcd, 0x42440646,
	0xb1b43585, 0x23282b0b, 0x61642545, 0xf2f83aca,
	0xe3e023c3, 0xb1b83989, 0xb1b03181, 0x939c1f8f,
	0x525c1e4e, 0xf1f839c9, 0xe2e426c6, 0xb2b03282,
	0x31303101, 0xe2e82aca, 0x616c2d4d, 0x535c1f4f,
	0xe0e424c4, 0xf0f030c0, 0xc1cc0dcd, 0x80880888,
	0x12141606, 0x32383a0a, 0x50581848, 0xd0d414c4,
	0x62602242, 0x21282909, 0x03040707, 0x33303303,
	0xe0e828c8, 0x13181b0b, 0x01040505, 0x71783949,
	0x90901080, 0x62682a4a, 0x22282a0a, 0x92981a8a,
};

static const u32 SS3[256] = {
	0x08303838, 0xc8e0e828, 0x0d212c2d, 0x86a2a426,
	0xcfc3cc0f, 0xced2dc1e, 0x83b3b033, 0x88b0b838,
	0x8fa3ac2f, 0x40606020, 0x45515415, 0xc7c3c407,
	0x44404404, 0x4f636c2f, 0x4b63682b, 0x4b53581b,
	0xc3c3c003, 0x42626022, 0x03333033, 0x85b1b435,
	0x09212829, 0x80a0a020, 0xc2e2e022, 0x87a3a427,
	0xc3d3d013, 0x81919011, 0x01111011, 0x06020406,
	0x0c101c1c, 0x8cb0bc3c, 0x06323436, 0x4b43480b,
	0xcfe3ec2f, 0x88808808, 0x4c606c2c, 0x88a0a828,
	0x07131417, 0xc4c0c404, 0x06121416, 0xc4f0f434,
	0xc2c2c002, 0x45414405, 0xc1e1e021, 0xc6d2d416,
	0x0f333c3f, 0x0d313c3d, 0x8e828c0e, 0x88909818,
	0x08202828, 0x4e424c0e, 0xc6f2f436, 0x0e323c3e,
	0x85a1a425, 0xc9f1f839, 0x0d010c0d, 0xcfd3dc1f,
	0xc8d0d818, 0x0b23282b, 0x46626426, 0x4a72783a,
	0x07232427, 0x0f232c2f, 0xc1f1f031, 0x42727032,
	0x42424002, 0xc4d0d414, 0x41414001, 0xc0c0c000,
	0x43737033, 0x47636427, 0x8ca0ac2c, 0x8b83880b,
	0xc7f3f437, 0x8da1ac2d, 0x80808000, 0x0f131c1f,
	0xcac2c80a, 0x0c202c2c, 0x8aa2a82a, 0x04303434,
	0xc2d2d012, 0x0b03080b, 0xcee2ec2e, 0xc9e1e829,
	0x4d515c1d, 0x84909414, 0x08101818, 0xc8f0f838,
	0x47535417, 0x8ea2ac2e, 0x08000808, 0xc5c1c405,
	0x03131013, 0xcdc1cc0d, 0x86828406, 0x89b1b839,
	0xcff3fc3f, 0x4d717c3d, 0xc1c1c001, 0x01313031,
	0xc5f1f435, 0x8a82880a, 0x4a62682a, 0x81b1b031,
	0xc1d1d011, 0x00202020, 0xc7d3d417, 0x02020002,
	0x02222022, 0x04000404, 0x48606828, 0x41717031,
	0x07030407, 0xcbd3d81b, 0x8d919c1d, 0x89919819,
	0x41616021, 0x8eb2bc3e, 0xc6e2e426, 0x49515819,
	0xcdd1dc1d, 0x41515011, 0x80909010, 0xccd0dc1c,
	0x8a92981a, 0x83a3a023, 0x8ba3a82b, 0xc0d0d010,
	0x81818001, 0x0f030c0f, 0x47434407, 0x0a12181a,
	0xc3e3e023, 0xcce0ec2c, 0x8d818c0d, 0x8fb3bc3f,
	0x86929416, 0x4b73783b, 0x4c505c1c, 0x82a2a022,
	0x81a1a021, 0x43636023, 0x03232023, 0x4d414c0d,
	0xc8c0c808, 0x8e929c1e, 0x8c909c1c, 0x0a32383a,
	0x0c000c0c, 0x0e222c2e, 0x8ab2b83a, 0x4e626c2e,
	0x8f939c1f, 0x4a52581a, 0xc2f2f032, 0x82929012,
	0xc3f3f033, 0x49414809, 0x48707838, 0xccc0cc0c,
	0x05111415, 0xcbf3f83b, 0x40707030, 0x45717435,
	0x4f737c3f, 0x05313435, 0x00101010, 0x03030003,
	0x44606424, 0x4d616c2d, 0xc6c2c406, 0x44707434,
	0xc5d1d415, 0x84b0b434, 0xcae2e82a, 0x09010809,
	0x46727436, 0x09111819, 0xcef2fc3e, 0x40404000,
	0x02121012, 0xc0e0e020, 0x8db1bc3d, 0x05010405,
	0xcaf2f83a, 0x01010001, 0xc0f0f030, 0x0a22282a,
	0x4e525c1e, 0x89a1a829, 0x46525416, 0x43434003,
	0x85818405, 0x04101414, 0x89818809, 0x8b93981b,
	0x80b0b030, 0xc5e1e425, 0x48404808, 0x49717839,
	0x87939417, 0xccf0fc3c, 0x0e121c1e, 0x82828002,
	0x01212021, 0x8c808c0c, 0x0b13181b, 0x4f535c1f,
	0x47737437, 0x44505414, 0x82b2b032, 0x0d111c1d,
	0x05212425, 0x4f434c0f, 0x00000000, 0x46424406,
	0xcde1ec2d, 0x48505818, 0x42525012, 0xcbe3e82b,
	0x4e727c3e, 0xcad2d81a, 0xc9c1c809, 0xcdf1fc3d,
	0x00303030, 0x85919415, 0x45616425, 0x0c303c3c,
	0x86b2b436, 0xc4e0e424, 0x8bb3b83b, 0x4c707c3c,
	0x0e020c0e, 0x40505010, 0x09313839, 0x06222426,
	0x02323032, 0x84808404, 0x49616829, 0x83939013,
	0x07333437, 0xc7e3e427, 0x04202424, 0x84a0a424,
	0xcbc3c80b, 0x43535013, 0x0a02080a, 0x87838407,
	0xc9d1d819, 0x4c404c0c, 0x83838003, 0x8f838c0f,
	0xcec2cc0e, 0x0b33383b, 0x4a42480a, 0x87b3b437,
};

static const u32 KC[SEED_NUM_KCONSTANTS] = {
	0x9e3779b9, 0x3c6ef373, 0x78dde6e6, 0xf1bbcdcc,
	0xe3779b99, 0xc6ef3733, 0x8dde6e67, 0x1bbcdccf,
	0x3779b99e, 0x6ef3733c, 0xdde6e678, 0xbbcdccf1,
	0x779b99e3, 0xef3733c6, 0xde6e678d, 0xbcdccf1b,
};

#define OP(X1, X2, X3, X4, rbase)			\
	t0 = X3 ^ ks[rbase];				\
	t1 = X4 ^ ks[rbase+1];				\
	t1 ^= t0;					\
	t1 = SS0[byte(t1, 0)] ^ SS1[byte(t1, 1)] ^	\
		SS2[byte(t1, 2)] ^ SS3[byte(t1, 3)];	\
	t0 += t1;					\
	t0 = SS0[byte(t0, 0)] ^ SS1[byte(t0, 1)] ^	\
		SS2[byte(t0, 2)] ^ SS3[byte(t0, 3)];	\
	t1 += t0;					\
	t1 = SS0[byte(t1, 0)] ^ SS1[byte(t1, 1)] ^	\
		SS2[byte(t1, 2)] ^ SS3[byte(t1, 3)];	\
	t0 += t1;					\
	X1 ^= t0;					\
	X2 ^= t1;

static int seed_set_key(struct crypto_tfm *tfm, const u8 *in_key,
		        unsigned int key_len)
{
	struct seed_ctx *ctx = crypto_tfm_ctx(tfm);
	u32 *keyout = ctx->keysched;
	const __be32 *key = (const __be32 *)in_key;
	u32 i, t0, t1, x1, x2, x3, x4;

	x1 = be32_to_cpu(key[0]);
	x2 = be32_to_cpu(key[1]);
	x3 = be32_to_cpu(key[2]);
	x4 = be32_to_cpu(key[3]);

	for (i = 0; i < SEED_NUM_KCONSTANTS; i++) {
		t0 = x1 + x3 - KC[i];
		t1 = x2 + KC[i] - x4;
		*(keyout++) = SS0[byte(t0, 0)] ^ SS1[byte(t0, 1)] ^
				SS2[byte(t0, 2)] ^ SS3[byte(t0, 3)];
		*(keyout++) = SS0[byte(t1, 0)] ^ SS1[byte(t1, 1)] ^
				SS2[byte(t1, 2)] ^ SS3[byte(t1, 3)];

		if (i % 2 == 0) {
			t0 = x1;
			x1 = (x1 >> 8) ^ (x2 << 24);
			x2 = (x2 >> 8) ^ (t0 << 24);
		} else {
			t0 = x3;
			x3 = (x3 << 8) ^ (x4 >> 24);
			x4 = (x4 << 8) ^ (t0 >> 24);
		}
	}

	return 0;
}

/* encrypt a block of text */

static void seed_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
{
	const struct seed_ctx *ctx = crypto_tfm_ctx(tfm);
	const __be32 *src = (const __be32 *)in;
	__be32 *dst = (__be32 *)out;
	u32 x1, x2, x3, x4, t0, t1;
	const u32 *ks = ctx->keysched;

	x1 = be32_to_cpu(src[0]);
	x2 = be32_to_cpu(src[1]);
	x3 = be32_to_cpu(src[2]);
	x4 = be32_to_cpu(src[3]);

	OP(x1, x2, x3, x4, 0);
	OP(x3, x4, x1, x2, 2);
	OP(x1, x2, x3, x4, 4);
	OP(x3, x4, x1, x2, 6);
	OP(x1, x2, x3, x4, 8);
	OP(x3, x4, x1, x2, 10);
	OP(x1, x2, x3, x4, 12);
	OP(x3, x4, x1, x2, 14);
	OP(x1, x2, x3, x4, 16);
	OP(x3, x4, x1, x2, 18);
	OP(x1, x2, x3, x4, 20);
	OP(x3, x4, x1, x2, 22);
	OP(x1, x2, x3, x4, 24);
	OP(x3, x4, x1, x2, 26);
	OP(x1, x2, x3, x4, 28);
	OP(x3, x4, x1, x2, 30);

	dst[0] = cpu_to_be32(x3);
	dst[1] = cpu_to_be32(x4);
	dst[2] = cpu_to_be32(x1);
	dst[3] = cpu_to_be32(x2);
}

/* decrypt a block of text */

static void seed_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
{
	const struct seed_ctx *ctx = crypto_tfm_ctx(tfm);
	const __be32 *src = (const __be32 *)in;
	__be32 *dst = (__be32 *)out;
	u32 x1, x2, x3, x4, t0, t1;
	const u32 *ks = ctx->keysched;

	x1 = be32_to_cpu(src[0]);
	x2 = be32_to_cpu(src[1]);
	x3 = be32_to_cpu(src[2]);
	x4 = be32_to_cpu(src[3]);

	OP(x1, x2, x3, x4, 30);
	OP(x3, x4, x1, x2, 28);
	OP(x1, x2, x3, x4, 26);
	OP(x3, x4, x1, x2, 24);
	OP(x1, x2, x3, x4, 22);
	OP(x3, x4, x1, x2, 20);
	OP(x1, x2, x3, x4, 18);
	OP(x3, x4, x1, x2, 16);
	OP(x1, x2, x3, x4, 14);
	OP(x3, x4, x1, x2, 12);
	OP(x1, x2, x3, x4, 10);
	OP(x3, x4, x1, x2, 8);
	OP(x1, x2, x3, x4, 6);
	OP(x3, x4, x1, x2, 4);
	OP(x1, x2, x3, x4, 2);
	OP(x3, x4, x1, x2, 0);

	dst[0] = cpu_to_be32(x3);
	dst[1] = cpu_to_be32(x4);
	dst[2] = cpu_to_be32(x1);
	dst[3] = cpu_to_be32(x2);
}


static struct crypto_alg seed_alg = {
	.cra_name		=	"seed",
	.cra_driver_name	=	"seed-generic",
	.cra_priority		=	100,
	.cra_flags		=	CRYPTO_ALG_TYPE_CIPHER,
	.cra_blocksize		=	SEED_BLOCK_SIZE,
	.cra_ctxsize		=	sizeof(struct seed_ctx),
	.cra_alignmask		=	3,
	.cra_module		=	THIS_MODULE,
	.cra_u			=	{
		.cipher = {
			.cia_min_keysize	=	SEED_KEY_SIZE,
			.cia_max_keysize	=	SEED_KEY_SIZE,
			.cia_setkey		=	seed_set_key,
			.cia_encrypt		=	seed_encrypt,
			.cia_decrypt		=	seed_decrypt
		}
	}
};

static int __init seed_init(void)
{
	return crypto_register_alg(&seed_alg);
}

static void __exit seed_fini(void)
{
	crypto_unregister_alg(&seed_alg);
}

module_init(seed_init);
module_exit(seed_fini);

MODULE_DESCRIPTION("SEED Cipher Algorithm");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Hye-Shik Chang <perky@FreeBSD.org>, Kim Hyun <hkim@kisa.or.kr>");
MODULE_ALIAS_CRYPTO("seed");