Botan  2.6.0
Crypto and TLS for C++11
seed.cpp
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1 /*
2 * SEED
3 * (C) 1999-2007 Jack Lloyd
4 *
5 * Botan is released under the Simplified BSD License (see license.txt)
6 */
7 
8 #include <botan/seed.h>
9 #include <botan/loadstor.h>
10 
11 namespace Botan {
12 
13 namespace {
14 
15 const uint32_t SEED_S0[256] = {
16  0x2989A1A8, 0x05858184, 0x16C6D2D4, 0x13C3D3D0, 0x14445054, 0x1D0D111C,
17  0x2C8CA0AC, 0x25052124, 0x1D4D515C, 0x03434340, 0x18081018, 0x1E0E121C,
18  0x11415150, 0x3CCCF0FC, 0x0ACAC2C8, 0x23436360, 0x28082028, 0x04444044,
19  0x20002020, 0x1D8D919C, 0x20C0E0E0, 0x22C2E2E0, 0x08C8C0C8, 0x17071314,
20  0x2585A1A4, 0x0F8F838C, 0x03030300, 0x3B4B7378, 0x3B8BB3B8, 0x13031310,
21  0x12C2D2D0, 0x2ECEE2EC, 0x30407070, 0x0C8C808C, 0x3F0F333C, 0x2888A0A8,
22  0x32023230, 0x1DCDD1DC, 0x36C6F2F4, 0x34447074, 0x2CCCE0EC, 0x15859194,
23  0x0B0B0308, 0x17475354, 0x1C4C505C, 0x1B4B5358, 0x3D8DB1BC, 0x01010100,
24  0x24042024, 0x1C0C101C, 0x33437370, 0x18889098, 0x10001010, 0x0CCCC0CC,
25  0x32C2F2F0, 0x19C9D1D8, 0x2C0C202C, 0x27C7E3E4, 0x32427270, 0x03838380,
26  0x1B8B9398, 0x11C1D1D0, 0x06868284, 0x09C9C1C8, 0x20406060, 0x10405050,
27  0x2383A3A0, 0x2BCBE3E8, 0x0D0D010C, 0x3686B2B4, 0x1E8E929C, 0x0F4F434C,
28  0x3787B3B4, 0x1A4A5258, 0x06C6C2C4, 0x38487078, 0x2686A2A4, 0x12021210,
29  0x2F8FA3AC, 0x15C5D1D4, 0x21416160, 0x03C3C3C0, 0x3484B0B4, 0x01414140,
30  0x12425250, 0x3D4D717C, 0x0D8D818C, 0x08080008, 0x1F0F131C, 0x19899198,
31  0x00000000, 0x19091118, 0x04040004, 0x13435350, 0x37C7F3F4, 0x21C1E1E0,
32  0x3DCDF1FC, 0x36467274, 0x2F0F232C, 0x27072324, 0x3080B0B0, 0x0B8B8388,
33  0x0E0E020C, 0x2B8BA3A8, 0x2282A2A0, 0x2E4E626C, 0x13839390, 0x0D4D414C,
34  0x29496168, 0x3C4C707C, 0x09090108, 0x0A0A0208, 0x3F8FB3BC, 0x2FCFE3EC,
35  0x33C3F3F0, 0x05C5C1C4, 0x07878384, 0x14041014, 0x3ECEF2FC, 0x24446064,
36  0x1ECED2DC, 0x2E0E222C, 0x0B4B4348, 0x1A0A1218, 0x06060204, 0x21012120,
37  0x2B4B6368, 0x26466264, 0x02020200, 0x35C5F1F4, 0x12829290, 0x0A8A8288,
38  0x0C0C000C, 0x3383B3B0, 0x3E4E727C, 0x10C0D0D0, 0x3A4A7278, 0x07474344,
39  0x16869294, 0x25C5E1E4, 0x26062224, 0x00808080, 0x2D8DA1AC, 0x1FCFD3DC,
40  0x2181A1A0, 0x30003030, 0x37073334, 0x2E8EA2AC, 0x36063234, 0x15051114,
41  0x22022220, 0x38083038, 0x34C4F0F4, 0x2787A3A4, 0x05454144, 0x0C4C404C,
42  0x01818180, 0x29C9E1E8, 0x04848084, 0x17879394, 0x35053134, 0x0BCBC3C8,
43  0x0ECEC2CC, 0x3C0C303C, 0x31417170, 0x11011110, 0x07C7C3C4, 0x09898188,
44  0x35457174, 0x3BCBF3F8, 0x1ACAD2D8, 0x38C8F0F8, 0x14849094, 0x19495158,
45  0x02828280, 0x04C4C0C4, 0x3FCFF3FC, 0x09494148, 0x39093138, 0x27476364,
46  0x00C0C0C0, 0x0FCFC3CC, 0x17C7D3D4, 0x3888B0B8, 0x0F0F030C, 0x0E8E828C,
47  0x02424240, 0x23032320, 0x11819190, 0x2C4C606C, 0x1BCBD3D8, 0x2484A0A4,
48  0x34043034, 0x31C1F1F0, 0x08484048, 0x02C2C2C0, 0x2F4F636C, 0x3D0D313C,
49  0x2D0D212C, 0x00404040, 0x3E8EB2BC, 0x3E0E323C, 0x3C8CB0BC, 0x01C1C1C0,
50  0x2A8AA2A8, 0x3A8AB2B8, 0x0E4E424C, 0x15455154, 0x3B0B3338, 0x1CCCD0DC,
51  0x28486068, 0x3F4F737C, 0x1C8C909C, 0x18C8D0D8, 0x0A4A4248, 0x16465254,
52  0x37477374, 0x2080A0A0, 0x2DCDE1EC, 0x06464244, 0x3585B1B4, 0x2B0B2328,
53  0x25456164, 0x3ACAF2F8, 0x23C3E3E0, 0x3989B1B8, 0x3181B1B0, 0x1F8F939C,
54  0x1E4E525C, 0x39C9F1F8, 0x26C6E2E4, 0x3282B2B0, 0x31013130, 0x2ACAE2E8,
55  0x2D4D616C, 0x1F4F535C, 0x24C4E0E4, 0x30C0F0F0, 0x0DCDC1CC, 0x08888088,
56  0x16061214, 0x3A0A3238, 0x18485058, 0x14C4D0D4, 0x22426260, 0x29092128,
57  0x07070304, 0x33033330, 0x28C8E0E8, 0x1B0B1318, 0x05050104, 0x39497178,
58  0x10809090, 0x2A4A6268, 0x2A0A2228, 0x1A8A9298 };
59 
60 const uint32_t SEED_S1[256] = {
61  0x38380830, 0xE828C8E0, 0x2C2D0D21, 0xA42686A2, 0xCC0FCFC3, 0xDC1ECED2,
62  0xB03383B3, 0xB83888B0, 0xAC2F8FA3, 0x60204060, 0x54154551, 0xC407C7C3,
63  0x44044440, 0x6C2F4F63, 0x682B4B63, 0x581B4B53, 0xC003C3C3, 0x60224262,
64  0x30330333, 0xB43585B1, 0x28290921, 0xA02080A0, 0xE022C2E2, 0xA42787A3,
65  0xD013C3D3, 0x90118191, 0x10110111, 0x04060602, 0x1C1C0C10, 0xBC3C8CB0,
66  0x34360632, 0x480B4B43, 0xEC2FCFE3, 0x88088880, 0x6C2C4C60, 0xA82888A0,
67  0x14170713, 0xC404C4C0, 0x14160612, 0xF434C4F0, 0xC002C2C2, 0x44054541,
68  0xE021C1E1, 0xD416C6D2, 0x3C3F0F33, 0x3C3D0D31, 0x8C0E8E82, 0x98188890,
69  0x28280820, 0x4C0E4E42, 0xF436C6F2, 0x3C3E0E32, 0xA42585A1, 0xF839C9F1,
70  0x0C0D0D01, 0xDC1FCFD3, 0xD818C8D0, 0x282B0B23, 0x64264662, 0x783A4A72,
71  0x24270723, 0x2C2F0F23, 0xF031C1F1, 0x70324272, 0x40024242, 0xD414C4D0,
72  0x40014141, 0xC000C0C0, 0x70334373, 0x64274763, 0xAC2C8CA0, 0x880B8B83,
73  0xF437C7F3, 0xAC2D8DA1, 0x80008080, 0x1C1F0F13, 0xC80ACAC2, 0x2C2C0C20,
74  0xA82A8AA2, 0x34340430, 0xD012C2D2, 0x080B0B03, 0xEC2ECEE2, 0xE829C9E1,
75  0x5C1D4D51, 0x94148490, 0x18180810, 0xF838C8F0, 0x54174753, 0xAC2E8EA2,
76  0x08080800, 0xC405C5C1, 0x10130313, 0xCC0DCDC1, 0x84068682, 0xB83989B1,
77  0xFC3FCFF3, 0x7C3D4D71, 0xC001C1C1, 0x30310131, 0xF435C5F1, 0x880A8A82,
78  0x682A4A62, 0xB03181B1, 0xD011C1D1, 0x20200020, 0xD417C7D3, 0x00020202,
79  0x20220222, 0x04040400, 0x68284860, 0x70314171, 0x04070703, 0xD81BCBD3,
80  0x9C1D8D91, 0x98198991, 0x60214161, 0xBC3E8EB2, 0xE426C6E2, 0x58194951,
81  0xDC1DCDD1, 0x50114151, 0x90108090, 0xDC1CCCD0, 0x981A8A92, 0xA02383A3,
82  0xA82B8BA3, 0xD010C0D0, 0x80018181, 0x0C0F0F03, 0x44074743, 0x181A0A12,
83  0xE023C3E3, 0xEC2CCCE0, 0x8C0D8D81, 0xBC3F8FB3, 0x94168692, 0x783B4B73,
84  0x5C1C4C50, 0xA02282A2, 0xA02181A1, 0x60234363, 0x20230323, 0x4C0D4D41,
85  0xC808C8C0, 0x9C1E8E92, 0x9C1C8C90, 0x383A0A32, 0x0C0C0C00, 0x2C2E0E22,
86  0xB83A8AB2, 0x6C2E4E62, 0x9C1F8F93, 0x581A4A52, 0xF032C2F2, 0x90128292,
87  0xF033C3F3, 0x48094941, 0x78384870, 0xCC0CCCC0, 0x14150511, 0xF83BCBF3,
88  0x70304070, 0x74354571, 0x7C3F4F73, 0x34350531, 0x10100010, 0x00030303,
89  0x64244460, 0x6C2D4D61, 0xC406C6C2, 0x74344470, 0xD415C5D1, 0xB43484B0,
90  0xE82ACAE2, 0x08090901, 0x74364672, 0x18190911, 0xFC3ECEF2, 0x40004040,
91  0x10120212, 0xE020C0E0, 0xBC3D8DB1, 0x04050501, 0xF83ACAF2, 0x00010101,
92  0xF030C0F0, 0x282A0A22, 0x5C1E4E52, 0xA82989A1, 0x54164652, 0x40034343,
93  0x84058581, 0x14140410, 0x88098981, 0x981B8B93, 0xB03080B0, 0xE425C5E1,
94  0x48084840, 0x78394971, 0x94178793, 0xFC3CCCF0, 0x1C1E0E12, 0x80028282,
95  0x20210121, 0x8C0C8C80, 0x181B0B13, 0x5C1F4F53, 0x74374773, 0x54144450,
96  0xB03282B2, 0x1C1D0D11, 0x24250521, 0x4C0F4F43, 0x00000000, 0x44064642,
97  0xEC2DCDE1, 0x58184850, 0x50124252, 0xE82BCBE3, 0x7C3E4E72, 0xD81ACAD2,
98  0xC809C9C1, 0xFC3DCDF1, 0x30300030, 0x94158591, 0x64254561, 0x3C3C0C30,
99  0xB43686B2, 0xE424C4E0, 0xB83B8BB3, 0x7C3C4C70, 0x0C0E0E02, 0x50104050,
100  0x38390931, 0x24260622, 0x30320232, 0x84048480, 0x68294961, 0x90138393,
101  0x34370733, 0xE427C7E3, 0x24240420, 0xA42484A0, 0xC80BCBC3, 0x50134353,
102  0x080A0A02, 0x84078783, 0xD819C9D1, 0x4C0C4C40, 0x80038383, 0x8C0F8F83,
103  0xCC0ECEC2, 0x383B0B33, 0x480A4A42, 0xB43787B3 };
104 
105 const uint32_t SEED_S2[256] = {
106  0xA1A82989, 0x81840585, 0xD2D416C6, 0xD3D013C3, 0x50541444, 0x111C1D0D,
107  0xA0AC2C8C, 0x21242505, 0x515C1D4D, 0x43400343, 0x10181808, 0x121C1E0E,
108  0x51501141, 0xF0FC3CCC, 0xC2C80ACA, 0x63602343, 0x20282808, 0x40440444,
109  0x20202000, 0x919C1D8D, 0xE0E020C0, 0xE2E022C2, 0xC0C808C8, 0x13141707,
110  0xA1A42585, 0x838C0F8F, 0x03000303, 0x73783B4B, 0xB3B83B8B, 0x13101303,
111  0xD2D012C2, 0xE2EC2ECE, 0x70703040, 0x808C0C8C, 0x333C3F0F, 0xA0A82888,
112  0x32303202, 0xD1DC1DCD, 0xF2F436C6, 0x70743444, 0xE0EC2CCC, 0x91941585,
113  0x03080B0B, 0x53541747, 0x505C1C4C, 0x53581B4B, 0xB1BC3D8D, 0x01000101,
114  0x20242404, 0x101C1C0C, 0x73703343, 0x90981888, 0x10101000, 0xC0CC0CCC,
115  0xF2F032C2, 0xD1D819C9, 0x202C2C0C, 0xE3E427C7, 0x72703242, 0x83800383,
116  0x93981B8B, 0xD1D011C1, 0x82840686, 0xC1C809C9, 0x60602040, 0x50501040,
117  0xA3A02383, 0xE3E82BCB, 0x010C0D0D, 0xB2B43686, 0x929C1E8E, 0x434C0F4F,
118  0xB3B43787, 0x52581A4A, 0xC2C406C6, 0x70783848, 0xA2A42686, 0x12101202,
119  0xA3AC2F8F, 0xD1D415C5, 0x61602141, 0xC3C003C3, 0xB0B43484, 0x41400141,
120  0x52501242, 0x717C3D4D, 0x818C0D8D, 0x00080808, 0x131C1F0F, 0x91981989,
121  0x00000000, 0x11181909, 0x00040404, 0x53501343, 0xF3F437C7, 0xE1E021C1,
122  0xF1FC3DCD, 0x72743646, 0x232C2F0F, 0x23242707, 0xB0B03080, 0x83880B8B,
123  0x020C0E0E, 0xA3A82B8B, 0xA2A02282, 0x626C2E4E, 0x93901383, 0x414C0D4D,
124  0x61682949, 0x707C3C4C, 0x01080909, 0x02080A0A, 0xB3BC3F8F, 0xE3EC2FCF,
125  0xF3F033C3, 0xC1C405C5, 0x83840787, 0x10141404, 0xF2FC3ECE, 0x60642444,
126  0xD2DC1ECE, 0x222C2E0E, 0x43480B4B, 0x12181A0A, 0x02040606, 0x21202101,
127  0x63682B4B, 0x62642646, 0x02000202, 0xF1F435C5, 0x92901282, 0x82880A8A,
128  0x000C0C0C, 0xB3B03383, 0x727C3E4E, 0xD0D010C0, 0x72783A4A, 0x43440747,
129  0x92941686, 0xE1E425C5, 0x22242606, 0x80800080, 0xA1AC2D8D, 0xD3DC1FCF,
130  0xA1A02181, 0x30303000, 0x33343707, 0xA2AC2E8E, 0x32343606, 0x11141505,
131  0x22202202, 0x30383808, 0xF0F434C4, 0xA3A42787, 0x41440545, 0x404C0C4C,
132  0x81800181, 0xE1E829C9, 0x80840484, 0x93941787, 0x31343505, 0xC3C80BCB,
133  0xC2CC0ECE, 0x303C3C0C, 0x71703141, 0x11101101, 0xC3C407C7, 0x81880989,
134  0x71743545, 0xF3F83BCB, 0xD2D81ACA, 0xF0F838C8, 0x90941484, 0x51581949,
135  0x82800282, 0xC0C404C4, 0xF3FC3FCF, 0x41480949, 0x31383909, 0x63642747,
136  0xC0C000C0, 0xC3CC0FCF, 0xD3D417C7, 0xB0B83888, 0x030C0F0F, 0x828C0E8E,
137  0x42400242, 0x23202303, 0x91901181, 0x606C2C4C, 0xD3D81BCB, 0xA0A42484,
138  0x30343404, 0xF1F031C1, 0x40480848, 0xC2C002C2, 0x636C2F4F, 0x313C3D0D,
139  0x212C2D0D, 0x40400040, 0xB2BC3E8E, 0x323C3E0E, 0xB0BC3C8C, 0xC1C001C1,
140  0xA2A82A8A, 0xB2B83A8A, 0x424C0E4E, 0x51541545, 0x33383B0B, 0xD0DC1CCC,
141  0x60682848, 0x737C3F4F, 0x909C1C8C, 0xD0D818C8, 0x42480A4A, 0x52541646,
142  0x73743747, 0xA0A02080, 0xE1EC2DCD, 0x42440646, 0xB1B43585, 0x23282B0B,
143  0x61642545, 0xF2F83ACA, 0xE3E023C3, 0xB1B83989, 0xB1B03181, 0x939C1F8F,
144  0x525C1E4E, 0xF1F839C9, 0xE2E426C6, 0xB2B03282, 0x31303101, 0xE2E82ACA,
145  0x616C2D4D, 0x535C1F4F, 0xE0E424C4, 0xF0F030C0, 0xC1CC0DCD, 0x80880888,
146  0x12141606, 0x32383A0A, 0x50581848, 0xD0D414C4, 0x62602242, 0x21282909,
147  0x03040707, 0x33303303, 0xE0E828C8, 0x13181B0B, 0x01040505, 0x71783949,
148  0x90901080, 0x62682A4A, 0x22282A0A, 0x92981A8A };
149 
150 const uint32_t SEED_S3[256] = {
151  0x08303838, 0xC8E0E828, 0x0D212C2D, 0x86A2A426, 0xCFC3CC0F, 0xCED2DC1E,
152  0x83B3B033, 0x88B0B838, 0x8FA3AC2F, 0x40606020, 0x45515415, 0xC7C3C407,
153  0x44404404, 0x4F636C2F, 0x4B63682B, 0x4B53581B, 0xC3C3C003, 0x42626022,
154  0x03333033, 0x85B1B435, 0x09212829, 0x80A0A020, 0xC2E2E022, 0x87A3A427,
155  0xC3D3D013, 0x81919011, 0x01111011, 0x06020406, 0x0C101C1C, 0x8CB0BC3C,
156  0x06323436, 0x4B43480B, 0xCFE3EC2F, 0x88808808, 0x4C606C2C, 0x88A0A828,
157  0x07131417, 0xC4C0C404, 0x06121416, 0xC4F0F434, 0xC2C2C002, 0x45414405,
158  0xC1E1E021, 0xC6D2D416, 0x0F333C3F, 0x0D313C3D, 0x8E828C0E, 0x88909818,
159  0x08202828, 0x4E424C0E, 0xC6F2F436, 0x0E323C3E, 0x85A1A425, 0xC9F1F839,
160  0x0D010C0D, 0xCFD3DC1F, 0xC8D0D818, 0x0B23282B, 0x46626426, 0x4A72783A,
161  0x07232427, 0x0F232C2F, 0xC1F1F031, 0x42727032, 0x42424002, 0xC4D0D414,
162  0x41414001, 0xC0C0C000, 0x43737033, 0x47636427, 0x8CA0AC2C, 0x8B83880B,
163  0xC7F3F437, 0x8DA1AC2D, 0x80808000, 0x0F131C1F, 0xCAC2C80A, 0x0C202C2C,
164  0x8AA2A82A, 0x04303434, 0xC2D2D012, 0x0B03080B, 0xCEE2EC2E, 0xC9E1E829,
165  0x4D515C1D, 0x84909414, 0x08101818, 0xC8F0F838, 0x47535417, 0x8EA2AC2E,
166  0x08000808, 0xC5C1C405, 0x03131013, 0xCDC1CC0D, 0x86828406, 0x89B1B839,
167  0xCFF3FC3F, 0x4D717C3D, 0xC1C1C001, 0x01313031, 0xC5F1F435, 0x8A82880A,
168  0x4A62682A, 0x81B1B031, 0xC1D1D011, 0x00202020, 0xC7D3D417, 0x02020002,
169  0x02222022, 0x04000404, 0x48606828, 0x41717031, 0x07030407, 0xCBD3D81B,
170  0x8D919C1D, 0x89919819, 0x41616021, 0x8EB2BC3E, 0xC6E2E426, 0x49515819,
171  0xCDD1DC1D, 0x41515011, 0x80909010, 0xCCD0DC1C, 0x8A92981A, 0x83A3A023,
172  0x8BA3A82B, 0xC0D0D010, 0x81818001, 0x0F030C0F, 0x47434407, 0x0A12181A,
173  0xC3E3E023, 0xCCE0EC2C, 0x8D818C0D, 0x8FB3BC3F, 0x86929416, 0x4B73783B,
174  0x4C505C1C, 0x82A2A022, 0x81A1A021, 0x43636023, 0x03232023, 0x4D414C0D,
175  0xC8C0C808, 0x8E929C1E, 0x8C909C1C, 0x0A32383A, 0x0C000C0C, 0x0E222C2E,
176  0x8AB2B83A, 0x4E626C2E, 0x8F939C1F, 0x4A52581A, 0xC2F2F032, 0x82929012,
177  0xC3F3F033, 0x49414809, 0x48707838, 0xCCC0CC0C, 0x05111415, 0xCBF3F83B,
178  0x40707030, 0x45717435, 0x4F737C3F, 0x05313435, 0x00101010, 0x03030003,
179  0x44606424, 0x4D616C2D, 0xC6C2C406, 0x44707434, 0xC5D1D415, 0x84B0B434,
180  0xCAE2E82A, 0x09010809, 0x46727436, 0x09111819, 0xCEF2FC3E, 0x40404000,
181  0x02121012, 0xC0E0E020, 0x8DB1BC3D, 0x05010405, 0xCAF2F83A, 0x01010001,
182  0xC0F0F030, 0x0A22282A, 0x4E525C1E, 0x89A1A829, 0x46525416, 0x43434003,
183  0x85818405, 0x04101414, 0x89818809, 0x8B93981B, 0x80B0B030, 0xC5E1E425,
184  0x48404808, 0x49717839, 0x87939417, 0xCCF0FC3C, 0x0E121C1E, 0x82828002,
185  0x01212021, 0x8C808C0C, 0x0B13181B, 0x4F535C1F, 0x47737437, 0x44505414,
186  0x82B2B032, 0x0D111C1D, 0x05212425, 0x4F434C0F, 0x00000000, 0x46424406,
187  0xCDE1EC2D, 0x48505818, 0x42525012, 0xCBE3E82B, 0x4E727C3E, 0xCAD2D81A,
188  0xC9C1C809, 0xCDF1FC3D, 0x00303030, 0x85919415, 0x45616425, 0x0C303C3C,
189  0x86B2B436, 0xC4E0E424, 0x8BB3B83B, 0x4C707C3C, 0x0E020C0E, 0x40505010,
190  0x09313839, 0x06222426, 0x02323032, 0x84808404, 0x49616829, 0x83939013,
191  0x07333437, 0xC7E3E427, 0x04202424, 0x84A0A424, 0xCBC3C80B, 0x43535013,
192  0x0A02080A, 0x87838407, 0xC9D1D819, 0x4C404C0C, 0x83838003, 0x8F838C0F,
193  0xCEC2CC0E, 0x0B33383B, 0x4A42480A, 0x87B3B437 };
194 
195 /*
196 * SEED G Function
197 */
198 inline uint32_t SEED_G(uint32_t X)
199  {
200  return (SEED_S0[get_byte(3, X)] ^ SEED_S1[get_byte(2, X)] ^
201  SEED_S2[get_byte(1, X)] ^ SEED_S3[get_byte(0, X)]);
202  }
203 
204 }
205 
206 /*
207 * SEED Encryption
208 */
209 void SEED::encrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const
210  {
211  verify_key_set(m_K.empty() == false);
212 
213  for(size_t i = 0; i != blocks; ++i)
214  {
215  uint32_t B0 = load_be<uint32_t>(in, 0);
216  uint32_t B1 = load_be<uint32_t>(in, 1);
217  uint32_t B2 = load_be<uint32_t>(in, 2);
218  uint32_t B3 = load_be<uint32_t>(in, 3);
219 
220  for(size_t j = 0; j != 16; j += 2)
221  {
222  uint32_t T0, T1;
223 
224  T0 = B2 ^ m_K[2*j];
225  T1 = SEED_G(B2 ^ B3 ^ m_K[2*j+1]);
226  T0 = SEED_G(T1 + T0);
227  T1 = SEED_G(T1 + T0);
228  B1 ^= T1;
229  B0 ^= T0 + T1;
230 
231  T0 = B0 ^ m_K[2*j+2];
232  T1 = SEED_G(B0 ^ B1 ^ m_K[2*j+3]);
233  T0 = SEED_G(T1 + T0);
234  T1 = SEED_G(T1 + T0);
235  B3 ^= T1;
236  B2 ^= T0 + T1;
237  }
238 
239  store_be(out, B2, B3, B0, B1);
240 
241  in += BLOCK_SIZE;
242  out += BLOCK_SIZE;
243  }
244  }
245 
246 /*
247 * SEED Decryption
248 */
249 void SEED::decrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const
250  {
251  verify_key_set(m_K.empty() == false);
252 
253  for(size_t i = 0; i != blocks; ++i)
254  {
255  uint32_t B0 = load_be<uint32_t>(in, 0);
256  uint32_t B1 = load_be<uint32_t>(in, 1);
257  uint32_t B2 = load_be<uint32_t>(in, 2);
258  uint32_t B3 = load_be<uint32_t>(in, 3);
259 
260  for(size_t j = 0; j != 16; j += 2)
261  {
262  uint32_t T0, T1;
263 
264  T0 = B2 ^ m_K[30-2*j];
265  T1 = SEED_G(B2 ^ B3 ^ m_K[31-2*j]);
266  T0 = SEED_G(T1 + T0);
267  T1 = SEED_G(T1 + T0);
268  B1 ^= T1;
269  B0 ^= T0 + T1;
270 
271  T0 = B0 ^ m_K[28-2*j];
272  T1 = SEED_G(B0 ^ B1 ^ m_K[29-2*j]);
273  T0 = SEED_G(T1 + T0);
274  T1 = SEED_G(T1 + T0);
275  B3 ^= T1;
276  B2 ^= T0 + T1;
277  }
278 
279  store_be(out, B2, B3, B0, B1);
280 
281  in += BLOCK_SIZE;
282  out += BLOCK_SIZE;
283  }
284  }
285 
286 /*
287 * SEED Key Schedule
288 */
289 void SEED::key_schedule(const uint8_t key[], size_t)
290  {
291  const uint32_t RC[16] = {
292  0x9E3779B9, 0x3C6EF373, 0x78DDE6E6, 0xF1BBCDCC,
293  0xE3779B99, 0xC6EF3733, 0x8DDE6E67, 0x1BBCDCCF,
294  0x3779B99E, 0x6EF3733C, 0xDDE6E678, 0xBBCDCCF1,
295  0x779B99E3, 0xEF3733C6, 0xDE6E678D, 0xBCDCCF1B
296  };
297 
298  secure_vector<uint32_t> WK(4);
299 
300  for(size_t i = 0; i != 4; ++i)
301  WK[i] = load_be<uint32_t>(key, i);
302 
303  m_K.resize(32);
304 
305  for(size_t i = 0; i != 16; i += 2)
306  {
307  m_K[2*i ] = SEED_G(WK[0] + WK[2] - RC[i]);
308  m_K[2*i+1] = SEED_G(WK[1] - WK[3] + RC[i]) ^ m_K[2*i];
309 
310  uint32_t T = (WK[0] & 0xFF) << 24;
311  WK[0] = (WK[0] >> 8) | (get_byte(3, WK[1]) << 24);
312  WK[1] = (WK[1] >> 8) | T;
313 
314  m_K[2*i+2] = SEED_G(WK[0] + WK[2] - RC[i+1]);
315  m_K[2*i+3] = SEED_G(WK[1] - WK[3] + RC[i+1]) ^ m_K[2*i+2];
316 
317  T = get_byte(0, WK[3]);
318  WK[3] = (WK[3] << 8) | get_byte(0, WK[2]);
319  WK[2] = (WK[2] << 8) | T;
320  }
321  }
322 
323 void SEED::clear()
324  {
325  zap(m_K);
326  }
327 
328 }
X
fe X
Definition: ge.cpp:27
Botan::SymmetricAlgorithm::verify_key_set
void verify_key_set(bool cond) const
Definition: sym_algo.h:95
Botan::SEED::decrypt_n
void decrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const override
Definition: seed.cpp:249
Botan::Block_Cipher_Fixed_Params< 16, 16 >::BLOCK_SIZE
Definition: block_cipher.h:207
Botan::zap
void zap(std::vector< T, Alloc > &vec)
Definition: secmem.h:193
Botan::store_be
void store_be(uint16_t in, uint8_t out[2])
Definition: loadstor.h:434
Botan::load_be< uint32_t >
uint32_t load_be< uint32_t >(const uint8_t in[], size_t off)
Definition: loadstor.h:177
Botan::SEED::clear
void clear() override
Definition: seed.cpp:323
Botan
Definition: alg_id.cpp:13
Botan::SEED::encrypt_n
void encrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const override
Definition: seed.cpp:209
T
fe T
Definition: ge.cpp:37
Botan::get_byte
uint8_t get_byte(size_t byte_num, T input)
Definition: loadstor.h:39
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