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국산암호_소스코드_개발_매뉴얼(SEED).pdf
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📔 암호 블록 체인 (cipher-block chaining, CBC)
암호 블록 체인 (cipher-block chaining, CBC) 방식은 1976년 IBM에 의해 개발되었다. 각 블록은 암호화되기 전에 이전 블록의 암호화 결과와 XOR되며, 첫 블록의 경우에는 초기화 벡터가 사용된다. 초기화 벡터가 같은 경우 출력 결과가 항상 같기 때문에, 매 암호화마다 다른 초기화 벡터를 사용해야 한다.
CBC 방식은 현재 널리 사용되는 운용 방식 중 하나이다. CBC는 암호화 입력 값이 이전 결과에 의존하기 때문에 병렬화가 불가능하지만, 복호화의 경우 각 블록을 복호화한 다음 이전 암호화 블록과 XOR하여 복구할 수 있기 때문에 병렬화가 가능하다.
📄 암호 블록 체인 (cipher-block chaining, CBC) C Source Code
KISA_SEED_ECB_CBC_CTR_CCM_GCM.zip
0.27MB
KISA_SEED_CBC.c
0.03MB
KISA_SEED_CBC.h
0.00MB
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "KISA_SEED_CBC.h"
// S-BOX
const static DWORD 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
};
const static DWORD 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
};
const static DWORD 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
};
const static DWORD 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
};
#define BLOCK_SIZE_SEED 16
#define BLOCK_SIZE_SEED_INT 4
#define GetB0(A) ( (BYTE)((A) ) )
#define GetB1(A) ( (BYTE)((A)>> 8) )
#define GetB2(A) ( (BYTE)((A)>>16) )
#define GetB3(A) ( (BYTE)((A)>>24) )
// Round function F and adding output of F to L.
// L0, L1 : left input values at each round
// R0, R1 : right input values at each round
// K : round keys at each round
#define SeedRound(L0, L1, R0, R1, K) { \
T0 = R0 ^ (K)[0]; \
T1 = R1 ^ (K)[1]; \
T1 ^= T0; \
T1 = SS0[GetB0(T1)] ^ SS1[GetB1(T1)] ^ \
SS2[GetB2(T1)] ^ SS3[GetB3(T1)]; \
T0 += T1; \
T0 = SS0[GetB0(T0)] ^ SS1[GetB1(T0)] ^ \
SS2[GetB2(T0)] ^ SS3[GetB3(T0)]; \
T1 += T0; \
T1 = SS0[GetB0(T1)] ^ SS1[GetB1(T1)] ^ \
SS2[GetB2(T1)] ^ SS3[GetB3(T1)]; \
T0 += T1; \
L0 ^= T0; L1 ^= T1; \
}
#define ROTL(x, n) (((x) << (n)) | ((x) >> (32-(n))))
#define ROTR(x, n) (((x) >> (n)) | ((x) << (32-(n))))
#define EndianChange(dwS) \
( (ROTL((dwS), 8) & (DWORD)0x00ff00ff) | \
(ROTL((dwS), 24) & (DWORD)0xff00ff00) ) \
/************************ Constants for Key schedule **************************/
#define KC0 0x9e3779b9UL
#define KC1 0x3c6ef373UL
#define KC2 0x78dde6e6UL
#define KC3 0xf1bbcdccUL
#define KC4 0xe3779b99UL
#define KC5 0xc6ef3733UL
#define KC6 0x8dde6e67UL
#define KC7 0x1bbcdccfUL
#define KC8 0x3779b99eUL
#define KC9 0x6ef3733cUL
#define KC10 0xdde6e678UL
#define KC11 0xbbcdccf1UL
#define KC12 0x779b99e3UL
#define KC13 0xef3733c6UL
#define KC14 0xde6e678dUL
#define KC15 0xbcdccf1bUL
#define RoundKeyUpdate0(K, A, B, C, D, KC) { \
T0 = A + C - KC; \
T1 = B + KC - D; \
(K)[0] = SS0[GetB0(T0)] ^ SS1[GetB1(T0)] ^ \
SS2[GetB2(T0)] ^ SS3[GetB3(T0)]; \
(K)[1] = SS0[GetB0(T1)] ^ SS1[GetB1(T1)] ^ \
SS2[GetB2(T1)] ^ SS3[GetB3(T1)]; \
T0 = A; \
A = (A>>8) ^ (B<<24); \
B = (B>>8) ^ (T0<<24); \
}
#define RoundKeyUpdate1(K, A, B, C, D, KC) { \
T0 = A + C - KC; \
T1 = B + KC - D; \
(K)[0] = SS0[GetB0(T0)] ^ SS1[GetB1(T0)] ^ \
SS2[GetB2(T0)] ^ SS3[GetB3(T0)]; \
(K)[1] = SS0[GetB0(T1)] ^ SS1[GetB1(T1)] ^ \
SS2[GetB2(T1)] ^ SS3[GetB3(T1)]; \
T0 = C; \
C = (C<<8) ^ (D>>24); \
D = (D<<8) ^ (T0>>24); \
}
#define BLOCK_XOR_CBC( OUT_VALUE, IN_VALUE1, IN_VALUE2 ) { \
OUT_VALUE[0] = IN_VALUE1[0] ^ IN_VALUE2[0]; \
OUT_VALUE[1] = IN_VALUE1[1] ^ IN_VALUE2[1]; \
OUT_VALUE[2] = IN_VALUE1[2] ^ IN_VALUE2[2]; \
OUT_VALUE[3] = IN_VALUE1[3] ^ IN_VALUE2[3]; \
}
void KISA_SEED_Encrypt_Block_forCBC( unsigned int *in, unsigned int *out, KISA_SEED_KEY *ks )
{
DWORD L0, L1, R0, R1; // Iuput/output values at each rounds
DWORD T0, T1; // Temporary variables for round function F
DWORD *K = ks->key_data; // Pointer of round keys
// Set up input values for first round
L0 = in[0];
L1 = in[1];
R0 = in[2];
R1 = in[3];
// Reorder for big endian
// Because SEED use little endian order in default
#ifndef BIG_ENDIAN
L0 = EndianChange(L0);
L1 = EndianChange(L1);
R0 = EndianChange(R0);
R1 = EndianChange(R1);
#endif
SeedRound(L0, L1, R0, R1, K ); // Round 1
SeedRound(R0, R1, L0, L1, K+ 2); // Round 2
SeedRound(L0, L1, R0, R1, K+ 4); // Round 3
SeedRound(R0, R1, L0, L1, K+ 6); // Round 4
SeedRound(L0, L1, R0, R1, K+ 8); // Round 5
SeedRound(R0, R1, L0, L1, K+10); // Round 6
SeedRound(L0, L1, R0, R1, K+12); // Round 7
SeedRound(R0, R1, L0, L1, K+14); // Round 8
SeedRound(L0, L1, R0, R1, K+16); // Round 9
SeedRound(R0, R1, L0, L1, K+18); // Round 10
SeedRound(L0, L1, R0, R1, K+20); // Round 11
SeedRound(R0, R1, L0, L1, K+22); // Round 12
SeedRound(L0, L1, R0, R1, K+24); // Round 13
SeedRound(R0, R1, L0, L1, K+26); // Round 14
SeedRound(L0, L1, R0, R1, K+28); // Round 15
SeedRound(R0, R1, L0, L1, K+30); // Round 16
#ifndef BIG_ENDIAN
L0 = EndianChange(L0);
L1 = EndianChange(L1);
R0 = EndianChange(R0);
R1 = EndianChange(R1);
#endif
// Copying output values from last round to pbData
out[0] = R0;
out[1] = R1;
out[2] = L0;
out[3] = L1;
}
void KISA_SEED_Decrypt_Block_forCBC( unsigned int *in, unsigned int *out, KISA_SEED_KEY *ks )
{
DWORD L0, L1, R0, R1; // Iuput/output values at each rounds
DWORD T0, T1; // Temporary variables for round function F
DWORD *K = ks->key_data; // Pointer of round keys
// Set up input values for first round
L0 = in[0];
L1 = in[1];
R0 = in[2];
R1 = in[3];
// Reorder for big endian
#ifndef BIG_ENDIAN
L0 = EndianChange(L0);
L1 = EndianChange(L1);
R0 = EndianChange(R0);
R1 = EndianChange(R1);
#endif
SeedRound(L0, L1, R0, R1, K+30); // Round 1
SeedRound(R0, R1, L0, L1, K+28); // Round 2
SeedRound(L0, L1, R0, R1, K+26); // Round 3
SeedRound(R0, R1, L0, L1, K+24); // Round 4
SeedRound(L0, L1, R0, R1, K+22); // Round 5
SeedRound(R0, R1, L0, L1, K+20); // Round 6
SeedRound(L0, L1, R0, R1, K+18); // Round 7
SeedRound(R0, R1, L0, L1, K+16); // Round 8
SeedRound(L0, L1, R0, R1, K+14); // Round 9
SeedRound(R0, R1, L0, L1, K+12); // Round 10
SeedRound(L0, L1, R0, R1, K+10); // Round 11
SeedRound(R0, R1, L0, L1, K+ 8); // Round 12
SeedRound(L0, L1, R0, R1, K+ 6); // Round 13
SeedRound(R0, R1, L0, L1, K+ 4); // Round 14
SeedRound(L0, L1, R0, R1, K+ 2); // Round 15
SeedRound(R0, R1, L0, L1, K+ 0); // Round 16
#ifndef BIG_ENDIAN
L0 = EndianChange(L0);
L1 = EndianChange(L1);
R0 = EndianChange(R0);
R1 = EndianChange(R1);
#endif
// Copy output values from last round to pbData
out[0] = R0;
out[1] = R1;
out[2] = L0;
out[3] = L1;
}
DWORD* chartoint32_for_SEED_CBC( IN BYTE *in, IN int nLen )
{
unsigned int *data;
int len,i;
if(nLen % 4)
len = (nLen/4)+1;
else
len = (nLen/4);
data = malloc(sizeof(unsigned int) * len);
for(i=0;i<len;i++)
{
data[i] = ((unsigned int*)in)[i];
}
return data;
}
BYTE* int32tochar_for_SEED_CBC( IN DWORD *in, IN int nLen )
{
unsigned char *data;
int i;
data = malloc(sizeof(unsigned char) * nLen);
#ifndef BIG_ENDIAN
for(i=0;i<nLen;i++)
{
data[i] = (unsigned char)(in[i/4] >> ((i%4)*8));
}
#else
for(i=0;i<inLen;i++)
{
data[i] = (unsigned char)(in[i/4] >> ((3-(i%4))*8));
}
#endif
return data;
}
int SEED_CBC_init( OUT KISA_SEED_INFO *pInfo, IN KISA_ENC_DEC enc, IN BYTE *pbszUserKey, IN BYTE *pbszIV )
{
DWORD A, B, C, D; // Iuput/output values at each rounds
DWORD T0, T1; // Temporary variable
DWORD *K;
if( NULL == pInfo ||
NULL == pbszUserKey ||
NULL == pbszIV )
return 0;
memset( pInfo, 0, sizeof(KISA_SEED_INFO) );
K = pInfo->seed_key.key_data; // Pointer of round keys
pInfo->encrypt = enc;
memcpy( pInfo->ivec, pbszIV, 16 );
pInfo->last_block_flag = pInfo->buffer_length = 0;
// Set up input values for Key Schedule
A = ((DWORD *)pbszUserKey)[0];
B = ((DWORD *)pbszUserKey)[1];
C = ((DWORD *)pbszUserKey)[2];
D = ((DWORD *)pbszUserKey)[3];
// Reorder for big endian
#ifndef BIG_ENDIAN
A = EndianChange(A);
B = EndianChange(B);
C = EndianChange(C);
D = EndianChange(D);
#endif
// i-th round keys( K_i,0 and K_i,1 ) are denoted as K[2*(i-1)] and K[2*i-1], respectively
RoundKeyUpdate0(K , A, B, C, D, KC0 ); // K_1,0 and K_1,1
RoundKeyUpdate1(K+ 2, A, B, C, D, KC1 ); // K_2,0 and K_2,1
RoundKeyUpdate0(K+ 4, A, B, C, D, KC2 ); // K_3,0 and K_3,1
RoundKeyUpdate1(K+ 6, A, B, C, D, KC3 ); // K_4,0 and K_4,1
RoundKeyUpdate0(K+ 8, A, B, C, D, KC4 ); // K_5,0 and K_5,1
RoundKeyUpdate1(K+10, A, B, C, D, KC5 ); // K_6,0 and K_6,1
RoundKeyUpdate0(K+12, A, B, C, D, KC6 ); // K_7,0 and K_7,1
RoundKeyUpdate1(K+14, A, B, C, D, KC7 ); // K_8,0 and K_8,1
RoundKeyUpdate0(K+16, A, B, C, D, KC8 ); // K_9,0 and K_9,1
RoundKeyUpdate1(K+18, A, B, C, D, KC9 ); // K_10,0 and K_10,1
RoundKeyUpdate0(K+20, A, B, C, D, KC10); // K_11,0 and K_11,1
RoundKeyUpdate1(K+22, A, B, C, D, KC11); // K_12,0 and K_12,1
RoundKeyUpdate0(K+24, A, B, C, D, KC12); // K_13,0 and K_13,1
RoundKeyUpdate1(K+26, A, B, C, D, KC13); // K_14,0 and K_14,1
RoundKeyUpdate0(K+28, A, B, C, D, KC14); // K_15,0 and K_15,1
T0 = A + C - KC15;
T1 = B - D + KC15;
K[30] = SS0[GetB0(T0)] ^ SS1[GetB1(T0)] ^ // K_16,0
SS2[GetB2(T0)] ^ SS3[GetB3(T0)];
K[31] = SS0[GetB0(T1)] ^ SS1[GetB1(T1)] ^ // K_16,1
SS2[GetB2(T1)] ^ SS3[GetB3(T1)];
return 1;
}
int SEED_CBC_Process( OUT KISA_SEED_INFO *pInfo, IN DWORD *in, IN int inLen, OUT DWORD *out, OUT int *outLen )
{
int nCurrentCount = BLOCK_SIZE_SEED;
DWORD *pdwXOR;
if( NULL == pInfo ||
NULL == in ||
NULL == out ||
0 > inLen )
return 0;
pInfo->buffer_length = inLen - nCurrentCount;
if( KISA_ENCRYPT == pInfo->encrypt )
{
pdwXOR = pInfo->ivec;
while( nCurrentCount <= inLen )
{
BLOCK_XOR_CBC( out, in, pdwXOR );
KISA_SEED_Encrypt_Block_forCBC( out, out, &pInfo->seed_key );
pdwXOR = out;
nCurrentCount += BLOCK_SIZE_SEED;
in += BLOCK_SIZE_SEED_INT;
out += BLOCK_SIZE_SEED_INT;
}
*outLen = nCurrentCount - BLOCK_SIZE_SEED;
pInfo->buffer_length = inLen - *outLen;
memcpy( pInfo->ivec, pdwXOR, BLOCK_SIZE_SEED );
memcpy( pInfo->cbc_buffer, in, pInfo->buffer_length );
}
else
{
pdwXOR = pInfo->ivec;
while( nCurrentCount <= inLen )
{
KISA_SEED_Decrypt_Block_forCBC( in, out, &pInfo->seed_key );
BLOCK_XOR_CBC( out, out, pdwXOR );
pdwXOR = in;
nCurrentCount += BLOCK_SIZE_SEED;
in += BLOCK_SIZE_SEED_INT;
out += BLOCK_SIZE_SEED_INT;
}
*outLen = nCurrentCount - BLOCK_SIZE_SEED;
memcpy( pInfo->ivec, pdwXOR, BLOCK_SIZE_SEED );
memcpy( pInfo->cbc_last_block, out - BLOCK_SIZE_SEED_INT, BLOCK_SIZE_SEED );
}
return 1;
}
int SEED_CBC_Close( OUT KISA_SEED_INFO *pInfo, IN DWORD *out, IN int *outLen )
{
unsigned int nPaddngLeng;
int i;
BYTE *pOut = (BYTE *)(out);
*outLen = 0;
if( NULL == out )
return 0;
if( KISA_ENCRYPT == pInfo->encrypt )
{
nPaddngLeng = BLOCK_SIZE_SEED - pInfo->buffer_length;
for( i = pInfo->buffer_length; i<BLOCK_SIZE_SEED; i++ )
((BYTE *)pInfo->cbc_buffer)[i] = (BYTE)nPaddngLeng;
BLOCK_XOR_CBC( pInfo->cbc_buffer, pInfo->cbc_buffer, pInfo->ivec );
KISA_SEED_Encrypt_Block_forCBC( pInfo->cbc_buffer, out, &pInfo->seed_key );
out += BLOCK_SIZE_SEED_INT;
*outLen = BLOCK_SIZE_SEED;
}
else
{
nPaddngLeng = ((BYTE*)pInfo->cbc_last_block)[BLOCK_SIZE_SEED-1];
if( nPaddngLeng > 0 && nPaddngLeng <= BLOCK_SIZE_SEED )
{
for (i = nPaddngLeng; i>0; i--)
{
*(pOut - i) = (BYTE)0x00;
}
*outLen = nPaddngLeng;
}
else
return 0;
}
return 1;
}
int SEED_CBC_Encrypt( IN BYTE *pbszUserKey, IN BYTE *pbszIV, IN BYTE *pbszPlainText, IN int nPlainTextLen, OUT BYTE *pbszCipherText )
{
KISA_SEED_INFO info;
unsigned int *outbuf;
unsigned int *data;
unsigned char *newpbszPlainText;
unsigned char *cdata;
int outlen = 0;
int nRetOutLeng = 0;
int nPaddingLeng = 0;
int i;
int nPlainTextPadding = (BLOCK_SIZE_SEED - (nPlainTextLen % BLOCK_SIZE_SEED));
newpbszPlainText = malloc(sizeof(unsigned char) * (nPlainTextLen + nPlainTextPadding));
memcpy(newpbszPlainText, pbszPlainText, nPlainTextLen);
SEED_CBC_init( &info, KISA_ENCRYPT, pbszUserKey, pbszIV );
outlen = ((nPlainTextLen/16) + 1) *4 ;
outbuf = malloc(sizeof(unsigned int) * outlen);
data = chartoint32_for_SEED_CBC(newpbszPlainText, nPlainTextLen);
SEED_CBC_Process( &info, data, nPlainTextLen, outbuf, &nRetOutLeng );
SEED_CBC_Close( &info, outbuf + (nRetOutLeng)/4, &nPaddingLeng );
cdata = int32tochar_for_SEED_CBC(outbuf, nRetOutLeng + nPaddingLeng);
memcpy(pbszCipherText, cdata, nRetOutLeng + nPaddingLeng);
free(data);
free(cdata);
free(outbuf);
return nRetOutLeng+nPaddingLeng;
}
int SEED_CBC_Decrypt( IN BYTE *pbszUserKey, IN BYTE *pbszIV, IN BYTE *pbszCipherText, IN int nCipherTextLen, OUT BYTE *result )
{
KISA_SEED_INFO info;
unsigned int *outbuf;
unsigned int *data;
BYTE *newpbszCipherText;
BYTE *pbszPlainText;
unsigned char *cdata;
int outlen = 0;
int nRetOutLeng = 0;
int nPaddingLeng = 0;
int message_length = 0;
if ((nCipherTextLen % BLOCK_SIZE_SEED) > 0)
{
return 0;
}
newpbszCipherText = malloc(sizeof(unsigned char) * (nCipherTextLen));
memcpy(newpbszCipherText, pbszCipherText, nCipherTextLen);
pbszPlainText = malloc(sizeof(unsigned char) * (nCipherTextLen));
SEED_CBC_init( &info, KISA_DECRYPT, pbszUserKey, pbszIV );
outlen = (nCipherTextLen/16) * 4;
outbuf = malloc(sizeof(unsigned int) * outlen);
data = chartoint32_for_SEED_CBC(newpbszCipherText, nCipherTextLen);
SEED_CBC_Process( &info, data, nCipherTextLen, outbuf, &nRetOutLeng );
if (SEED_CBC_Close( &info, outbuf + (nRetOutLeng)/4, &nPaddingLeng ) > 0)
{
cdata = int32tochar_for_SEED_CBC( outbuf, nRetOutLeng - nPaddingLeng );
memcpy( pbszPlainText, cdata, nRetOutLeng - nPaddingLeng );
message_length = nRetOutLeng - nPaddingLeng;
if (message_length < 0)
{
message_length = 0;
}
memcpy( result, pbszPlainText, message_length);
free(data);
free(cdata);
free(outbuf);
return message_length;
}
else
return 0;
}
/*
// method 1 start
void main()
{
BYTE pbszUserKey[16] = {0x088, 0x0e3, 0x04f, 0x08f, 0x008, 0x017, 0x079, 0x0f1, 0x0e9, 0x0f3, 0x094, 0x037, 0x00a, 0x0d4, 0x005, 0x089};
BYTE pbszIV[16] = {0x026, 0x08d, 0x066, 0x0a7, 0x035, 0x0a8, 0x01a, 0x081, 0x06f, 0x0ba, 0x0d9, 0x0fa, 0x036, 0x016, 0x025, 0x001};
BYTE plainText[71] = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06};
BYTE pbszCipherText[80] = {0x00};
BYTE pbszPlainText[80] = {0x00};
int i;
int nPlainTextLen;
int nCipherTextLen;
printf ("Key : ");
for (i=0;i<16;i++) {printf("%02X ",pbszUserKey[i]);}
printf ("\nIV : ");
for (i=0;i<16;i++) {printf("%02X ",pbszIV[i]);}
printf ("\n\nLength of Plaintext : ");
scanf("%d", &nPlainTextLen);
printf ("\nPlaintext(%d) : ", nPlainTextLen);
for (i=0;i<nPlainTextLen;i++) {printf("%02X ",plainText[i]);}
printf ("\nEncryption....\n");
// Encryption Algorithm //
nCipherTextLen = SEED_CBC_Encrypt( pbszUserKey, pbszIV, plainText, nPlainTextLen, pbszCipherText );
printf ("\nCiphertext(%d) : ", nCipherTextLen);
for (i=0;i<nCipherTextLen;i++) {printf("%02X ",pbszCipherText[i]);}
printf ("\n\nLength of Ciphertext : ");
scanf("%d", &nCipherTextLen);
printf ("\nCiphertext(%d) : ", nCipherTextLen);
for (i=0;i<nCipherTextLen;i++) {printf("%02X ",pbszCipherText[i]);}
printf ("\n\nDecryption....");
// Decryption Algorithm //
nPlainTextLen = SEED_CBC_Decrypt( pbszUserKey, pbszIV, pbszCipherText, nCipherTextLen, pbszPlainText );
printf ("\nPlaintext(%d) : ", nPlainTextLen);
for (i=0;i<nPlainTextLen;i++) {printf("%02X ",pbszPlainText[i]);}
printf ("\n");
}
// method 1 end
*/
// method 2 start
void main()
{
BYTE pbszUserKey[16] = {0x088, 0x0e3, 0x04f, 0x08f, 0x008, 0x017, 0x079, 0x0f1, 0x0e9, 0x0f3, 0x094, 0x037, 0x00a, 0x0d4, 0x005, 0x089};
BYTE pbszIV[16] = {0x026, 0x08d, 0x066, 0x0a7, 0x035, 0x0a8, 0x01a, 0x081, 0x06f, 0x0ba, 0x0d9, 0x0fa, 0x036, 0x016, 0x025, 0x001};
BYTE plainText[71] = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06};
BYTE pbszCipherText[80] = {0x00};
BYTE pbszPlainText[80] = {0x00};
KISA_SEED_INFO info;
int i;
int nPlainTextLen = 0;
int nCipherTextLen = 0;
int message_length = 0;
int EncryptedMessage_length = 0;
#define process_blockLeng 32
unsigned int *outbuf;
unsigned char *PlainBytes = (BYTE *)(plainText);
unsigned char *CipherBytes = (BYTE *)(pbszCipherText);
unsigned int *data;
unsigned char *cdata;
int nRetOutLeng = 0;
int remainleng = 0;
int nPaddingLeng = 0;
printf ("Key : ");
for (i=0;i<16;i++) {printf("%02X ",pbszUserKey[i]);}
printf ("\nIV : ");
for (i=0;i<16;i++) {printf("%02X ",pbszIV[i]);}
printf ("\n\nLength of Plaintext : ");
scanf("%d", &nPlainTextLen);
printf ("\nPlaintext(%d) : ", nPlainTextLen);
for (i=0;i<nPlainTextLen;i++) {printf("%02X ",plainText[i]);}
printf ("\nEncryption....\n");
// Encryption Algorithm //
message_length = nPlainTextLen;
SEED_CBC_init( &info, KISA_ENCRYPT, pbszUserKey, pbszIV );
outbuf = malloc(sizeof(unsigned int) * process_blockLeng);
for (i = 0; i < message_length - process_blockLeng; )
{
memcpy( pbszPlainText, PlainBytes + i, process_blockLeng );
data = chartoint32_for_SEED_CBC(pbszPlainText, process_blockLeng);
SEED_CBC_Process( &info, data, process_blockLeng, outbuf, &nRetOutLeng );
cdata = int32tochar_for_SEED_CBC( outbuf, nRetOutLeng);
memcpy( CipherBytes + i, cdata, nRetOutLeng );
i += nRetOutLeng;
}
remainleng = message_length % process_blockLeng;
if (remainleng == 0)
{
remainleng = process_blockLeng;
}
memcpy( pbszPlainText, PlainBytes + i, remainleng );
data = chartoint32_for_SEED_CBC(pbszPlainText, remainleng);
SEED_CBC_Process( &info, data, remainleng, outbuf, &nRetOutLeng );
cdata = int32tochar_for_SEED_CBC( outbuf, nRetOutLeng);
memcpy( CipherBytes + i, cdata, nRetOutLeng );
i += nRetOutLeng;
free(cdata);
SEED_CBC_Close( &info, outbuf, &nPaddingLeng );
cdata = int32tochar_for_SEED_CBC(outbuf, nPaddingLeng);
memcpy(CipherBytes + i, cdata, nPaddingLeng);
free(data);
free(cdata);
nCipherTextLen = i + nPaddingLeng;
printf ("\nCiphertext(%d) : ", nCipherTextLen);
for (i=0;i<nCipherTextLen;i++) {printf("%02X ",CipherBytes[i]);}
printf ("\n\nLength of Ciphertext : ");
scanf("%d", &nCipherTextLen);
printf ("\nCiphertext(%d) : ", nCipherTextLen);
for (i=0;i<nCipherTextLen;i++) {printf("%02X ",CipherBytes[i]);}
printf ("\n\nDecryption....");
// Decryption Algorithm //
EncryptedMessage_length = nCipherTextLen;
if (EncryptedMessage_length % BLOCK_SIZE_SEED > 0)
{
nPlainTextLen = 0;
}
else
{
SEED_CBC_init( &info, KISA_DECRYPT, pbszUserKey, pbszIV );
for (i = 0; i < EncryptedMessage_length - process_blockLeng; )
{
memcpy( pbszCipherText, CipherBytes + i, process_blockLeng );
data = chartoint32_for_SEED_CBC(pbszCipherText, process_blockLeng);
SEED_CBC_Process( &info, data, process_blockLeng, outbuf, &nRetOutLeng );
cdata = int32tochar_for_SEED_CBC( outbuf, nRetOutLeng);
memcpy( PlainBytes + i, cdata, nRetOutLeng );
i += nRetOutLeng;
}
remainleng = EncryptedMessage_length % process_blockLeng;
if (remainleng == 0)
{
remainleng = process_blockLeng;
}
memcpy( pbszCipherText, CipherBytes + i, remainleng );
data = chartoint32_for_SEED_CBC(pbszCipherText, remainleng);
SEED_CBC_Process( &info, data, remainleng, outbuf, &nRetOutLeng );
if (SEED_CBC_Close( &info, outbuf + (nRetOutLeng)/4, &nPaddingLeng ) > 0)
{
cdata = int32tochar_for_SEED_CBC(outbuf, remainleng - nPaddingLeng);
memcpy(PlainBytes + i, cdata, remainleng - nPaddingLeng);
message_length = i + remainleng - nPaddingLeng;
free(data);
free(cdata);
free(outbuf);
nPlainTextLen = message_length;
}
else
{
nPlainTextLen = 0;
}
}
printf ("\nPlaintext(%d) : ", nPlainTextLen);
for (i=0;i<nPlainTextLen;i++) {printf("%02X ",PlainBytes[i]);}
printf ("\n");
}
// method 2 end
🚀 REFERENCE
KISA 암호이용활성화 - 암호알고리즘 소스코드
한국인터넷진흥원(KISA)에서는 128비트 블록암호 SEED를 쉽게 활용할 수 있도록, ECB, CBC, CTR, CCM, GCM 운영모드에 대한 소스코드를 배포하고 있습니다. 언어 : C/C++, Java, ASP, JSP, PHP 다음글 2019-01-31 이전글 2019-01-31
seed.kisa.or.kr
블록 암호 운용 방식 - 위키백과, 우리 모두의 백과사전
위키백과, 우리 모두의 백과사전. 암호학에서 블록 암호 운용 방식(영어: block cipher modes of operation)은 하나의 키 하에서 블록 암호를 반복적으로 안전하게 이용하게 하는 절차를 말한다.[1][2] 블록 암호는 특정한 길이의 블록 단위로 동작하기 때문에, 가변 길이 데이터를 암호화하기 위해서는 먼저 이들을 단위 블록들로 나누어야 하며, 그리고 그 블록들을 어떻게 암호화할지를 정해야 하는데, 이때 블록들의 암호화 방식을 운용 방식
ko.wikipedia.org
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