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00002
00003
00004 #include "pch.h"
00005
00006 #ifndef CRYPTOPP_IMPORTS
00007
00008 #include "skipjack.h"
00009
00010
00011
00012
00013
00014
00015
00016
00017
00018 NAMESPACE_BEGIN(CryptoPP)
00019
00020
00021
00022
00023 const byte SKIPJACK::Base::fTable[256] = {
00024 0xa3,0xd7,0x09,0x83,0xf8,0x48,0xf6,0xf4,0xb3,0x21,0x15,0x78,0x99,0xb1,0xaf,0xf9,
00025 0xe7,0x2d,0x4d,0x8a,0xce,0x4c,0xca,0x2e,0x52,0x95,0xd9,0x1e,0x4e,0x38,0x44,0x28,
00026 0x0a,0xdf,0x02,0xa0,0x17,0xf1,0x60,0x68,0x12,0xb7,0x7a,0xc3,0xe9,0xfa,0x3d,0x53,
00027 0x96,0x84,0x6b,0xba,0xf2,0x63,0x9a,0x19,0x7c,0xae,0xe5,0xf5,0xf7,0x16,0x6a,0xa2,
00028 0x39,0xb6,0x7b,0x0f,0xc1,0x93,0x81,0x1b,0xee,0xb4,0x1a,0xea,0xd0,0x91,0x2f,0xb8,
00029 0x55,0xb9,0xda,0x85,0x3f,0x41,0xbf,0xe0,0x5a,0x58,0x80,0x5f,0x66,0x0b,0xd8,0x90,
00030 0x35,0xd5,0xc0,0xa7,0x33,0x06,0x65,0x69,0x45,0x00,0x94,0x56,0x6d,0x98,0x9b,0x76,
00031 0x97,0xfc,0xb2,0xc2,0xb0,0xfe,0xdb,0x20,0xe1,0xeb,0xd6,0xe4,0xdd,0x47,0x4a,0x1d,
00032 0x42,0xed,0x9e,0x6e,0x49,0x3c,0xcd,0x43,0x27,0xd2,0x07,0xd4,0xde,0xc7,0x67,0x18,
00033 0x89,0xcb,0x30,0x1f,0x8d,0xc6,0x8f,0xaa,0xc8,0x74,0xdc,0xc9,0x5d,0x5c,0x31,0xa4,
00034 0x70,0x88,0x61,0x2c,0x9f,0x0d,0x2b,0x87,0x50,0x82,0x54,0x64,0x26,0x7d,0x03,0x40,
00035 0x34,0x4b,0x1c,0x73,0xd1,0xc4,0xfd,0x3b,0xcc,0xfb,0x7f,0xab,0xe6,0x3e,0x5b,0xa5,
00036 0xad,0x04,0x23,0x9c,0x14,0x51,0x22,0xf0,0x29,0x79,0x71,0x7e,0xff,0x8c,0x0e,0xe2,
00037 0x0c,0xef,0xbc,0x72,0x75,0x6f,0x37,0xa1,0xec,0xd3,0x8e,0x62,0x8b,0x86,0x10,0xe8,
00038 0x08,0x77,0x11,0xbe,0x92,0x4f,0x24,0xc5,0x32,0x36,0x9d,0xcf,0xf3,0xa6,0xbb,0xac,
00039 0x5e,0x6c,0xa9,0x13,0x57,0x25,0xb5,0xe3,0xbd,0xa8,0x3a,0x01,0x05,0x59,0x2a,0x46
00040 };
00041
00042
00043
00044
00045
00046
00047 #define g(tab, w, i, j, k, l) \
00048 { \
00049 w ^= (word)tab[i*256 + (w & 0xff)] << 8; \
00050 w ^= (word)tab[j*256 + (w >> 8)]; \
00051 w ^= (word)tab[k*256 + (w & 0xff)] << 8; \
00052 w ^= (word)tab[l*256 + (w >> 8)]; \
00053 }
00054
00055 #define g0(tab, w) g(tab, w, 0, 1, 2, 3)
00056 #define g1(tab, w) g(tab, w, 4, 5, 6, 7)
00057 #define g2(tab, w) g(tab, w, 8, 9, 0, 1)
00058 #define g3(tab, w) g(tab, w, 2, 3, 4, 5)
00059 #define g4(tab, w) g(tab, w, 6, 7, 8, 9)
00060
00061
00062
00063
00064 #define h(tab, w, i, j, k, l) \
00065 { \
00066 w ^= (word)tab[l*256 + (w >> 8)]; \
00067 w ^= (word)tab[k*256 + (w & 0xff)] << 8; \
00068 w ^= (word)tab[j*256 + (w >> 8)]; \
00069 w ^= (word)tab[i*256 + (w & 0xff)] << 8; \
00070 }
00071
00072 #define h0(tab, w) h(tab, w, 0, 1, 2, 3)
00073 #define h1(tab, w) h(tab, w, 4, 5, 6, 7)
00074 #define h2(tab, w) h(tab, w, 8, 9, 0, 1)
00075 #define h3(tab, w) h(tab, w, 2, 3, 4, 5)
00076 #define h4(tab, w) h(tab, w, 6, 7, 8, 9)
00077
00078
00079
00080
00081 void SKIPJACK::Base::UncheckedSetKey(const byte *key, unsigned int length, const NameValuePairs &)
00082 {
00083 AssertValidKeyLength(length);
00084
00085
00086 int i;
00087 for (i = 0; i < 10; i++) {
00088 byte *t = tab+i*256, k = key[9-i];
00089 int c;
00090 for (c = 0; c < 256; c++) {
00091 t[c] = fTable[c ^ k];
00092 }
00093 }
00094 }
00095
00096 typedef BlockGetAndPut<word16, LittleEndian> Block;
00097
00098
00099
00100
00101 void SKIPJACK::Enc::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const
00102 {
00103 word16 w1, w2, w3, w4;
00104 Block::Get(inBlock)(w4)(w3)(w2)(w1);
00105
00106
00107 g0(tab, w1); w4 ^= w1 ^ 1;
00108 g1(tab, w4); w3 ^= w4 ^ 2;
00109 g2(tab, w3); w2 ^= w3 ^ 3;
00110 g3(tab, w2); w1 ^= w2 ^ 4;
00111 g4(tab, w1); w4 ^= w1 ^ 5;
00112 g0(tab, w4); w3 ^= w4 ^ 6;
00113 g1(tab, w3); w2 ^= w3 ^ 7;
00114 g2(tab, w2); w1 ^= w2 ^ 8;
00115
00116
00117 w2 ^= w1 ^ 9; g3(tab, w1);
00118 w1 ^= w4 ^ 10; g4(tab, w4);
00119 w4 ^= w3 ^ 11; g0(tab, w3);
00120 w3 ^= w2 ^ 12; g1(tab, w2);
00121 w2 ^= w1 ^ 13; g2(tab, w1);
00122 w1 ^= w4 ^ 14; g3(tab, w4);
00123 w4 ^= w3 ^ 15; g4(tab, w3);
00124 w3 ^= w2 ^ 16; g0(tab, w2);
00125
00126
00127 g1(tab, w1); w4 ^= w1 ^ 17;
00128 g2(tab, w4); w3 ^= w4 ^ 18;
00129 g3(tab, w3); w2 ^= w3 ^ 19;
00130 g4(tab, w2); w1 ^= w2 ^ 20;
00131 g0(tab, w1); w4 ^= w1 ^ 21;
00132 g1(tab, w4); w3 ^= w4 ^ 22;
00133 g2(tab, w3); w2 ^= w3 ^ 23;
00134 g3(tab, w2); w1 ^= w2 ^ 24;
00135
00136
00137 w2 ^= w1 ^ 25; g4(tab, w1);
00138 w1 ^= w4 ^ 26; g0(tab, w4);
00139 w4 ^= w3 ^ 27; g1(tab, w3);
00140 w3 ^= w2 ^ 28; g2(tab, w2);
00141 w2 ^= w1 ^ 29; g3(tab, w1);
00142 w1 ^= w4 ^ 30; g4(tab, w4);
00143 w4 ^= w3 ^ 31; g0(tab, w3);
00144 w3 ^= w2 ^ 32; g1(tab, w2);
00145
00146 Block::Put(xorBlock, outBlock)(w4)(w3)(w2)(w1);
00147 }
00148
00149
00150
00151
00152 void SKIPJACK::Dec::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const
00153 {
00154 word16 w1, w2, w3, w4;
00155 Block::Get(inBlock)(w4)(w3)(w2)(w1);
00156
00157
00158 h1(tab, w2); w3 ^= w2 ^ 32;
00159 h0(tab, w3); w4 ^= w3 ^ 31;
00160 h4(tab, w4); w1 ^= w4 ^ 30;
00161 h3(tab, w1); w2 ^= w1 ^ 29;
00162 h2(tab, w2); w3 ^= w2 ^ 28;
00163 h1(tab, w3); w4 ^= w3 ^ 27;
00164 h0(tab, w4); w1 ^= w4 ^ 26;
00165 h4(tab, w1); w2 ^= w1 ^ 25;
00166
00167
00168 w1 ^= w2 ^ 24; h3(tab, w2);
00169 w2 ^= w3 ^ 23; h2(tab, w3);
00170 w3 ^= w4 ^ 22; h1(tab, w4);
00171 w4 ^= w1 ^ 21; h0(tab, w1);
00172 w1 ^= w2 ^ 20; h4(tab, w2);
00173 w2 ^= w3 ^ 19; h3(tab, w3);
00174 w3 ^= w4 ^ 18; h2(tab, w4);
00175 w4 ^= w1 ^ 17; h1(tab, w1);
00176
00177
00178 h0(tab, w2); w3 ^= w2 ^ 16;
00179 h4(tab, w3); w4 ^= w3 ^ 15;
00180 h3(tab, w4); w1 ^= w4 ^ 14;
00181 h2(tab, w1); w2 ^= w1 ^ 13;
00182 h1(tab, w2); w3 ^= w2 ^ 12;
00183 h0(tab, w3); w4 ^= w3 ^ 11;
00184 h4(tab, w4); w1 ^= w4 ^ 10;
00185 h3(tab, w1); w2 ^= w1 ^ 9;
00186
00187
00188 w1 ^= w2 ^ 8; h2(tab, w2);
00189 w2 ^= w3 ^ 7; h1(tab, w3);
00190 w3 ^= w4 ^ 6; h0(tab, w4);
00191 w4 ^= w1 ^ 5; h4(tab, w1);
00192 w1 ^= w2 ^ 4; h3(tab, w2);
00193 w2 ^= w3 ^ 3; h2(tab, w3);
00194 w3 ^= w4 ^ 2; h1(tab, w4);
00195 w4 ^= w1 ^ 1; h0(tab, w1);
00196
00197 Block::Put(xorBlock, outBlock)(w4)(w3)(w2)(w1);
00198 }
00199
00200 NAMESPACE_END
00201
00202 #endif