Mercurial > dropbear
annotate libtomcrypt/src/ciphers/twofish/twofish.c @ 1866:adfcdfb161a4
Fix missing NULL terminator for re-exec
Also fixes fallback, sockets were not kept open
author | Matt Johnston <matt@ucc.asn.au> |
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date | Mon, 31 Jan 2022 11:12:58 +0800 |
parents | 1ff2a1034c52 |
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1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis |
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2 * |
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3 * LibTomCrypt is a library that provides various cryptographic |
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4 * algorithms in a highly modular and flexible manner. |
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5 * |
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6 * The library is free for all purposes without any express |
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7 * guarantee it works. |
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8 */ |
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9 |
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10 /** |
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11 @file twofish.c |
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12 Implementation of Twofish by Tom St Denis |
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13 */ |
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14 #include "tomcrypt.h" |
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15 |
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16 #ifdef LTC_TWOFISH |
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17 |
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18 /* first LTC_TWOFISH_ALL_TABLES must ensure LTC_TWOFISH_TABLES is defined */ |
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19 #ifdef LTC_TWOFISH_ALL_TABLES |
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20 #ifndef LTC_TWOFISH_TABLES |
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21 #define LTC_TWOFISH_TABLES |
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22 #endif |
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23 #endif |
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24 |
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25 const struct ltc_cipher_descriptor twofish_desc = |
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26 { |
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27 "twofish", |
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28 7, |
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29 16, 32, 16, 16, |
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30 &twofish_setup, |
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31 &twofish_ecb_encrypt, |
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32 &twofish_ecb_decrypt, |
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33 &twofish_test, |
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34 &twofish_done, |
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35 &twofish_keysize, |
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36 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL |
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37 }; |
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38 |
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39 /* the two polynomials */ |
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40 #define MDS_POLY 0x169 |
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41 #define RS_POLY 0x14D |
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42 |
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43 /* The 4x8 RS Linear Transform */ |
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44 static const unsigned char RS[4][8] = { |
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45 { 0x01, 0xA4, 0x55, 0x87, 0x5A, 0x58, 0xDB, 0x9E }, |
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46 { 0xA4, 0x56, 0x82, 0xF3, 0X1E, 0XC6, 0X68, 0XE5 }, |
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47 { 0X02, 0XA1, 0XFC, 0XC1, 0X47, 0XAE, 0X3D, 0X19 }, |
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48 { 0XA4, 0X55, 0X87, 0X5A, 0X58, 0XDB, 0X9E, 0X03 } |
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49 }; |
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50 |
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51 #ifdef LTC_TWOFISH_SMALL |
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52 /* sbox usage orderings */ |
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53 static const unsigned char qord[4][5] = { |
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54 { 1, 1, 0, 0, 1 }, |
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55 { 0, 1, 1, 0, 0 }, |
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56 { 0, 0, 0, 1, 1 }, |
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57 { 1, 0, 1, 1, 0 } |
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58 }; |
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59 #endif /* LTC_TWOFISH_SMALL */ |
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60 |
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61 #ifdef LTC_TWOFISH_TABLES |
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62 |
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63 #define __LTC_TWOFISH_TAB_C__ |
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64 #include "twofish_tab.c" |
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65 |
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66 #define sbox(i, x) ((ulong32)SBOX[i][(x)&255]) |
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67 |
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68 #else |
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69 |
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70 /* The Q-box tables */ |
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71 static const unsigned char qbox[2][4][16] = { |
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72 { |
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73 { 0x8, 0x1, 0x7, 0xD, 0x6, 0xF, 0x3, 0x2, 0x0, 0xB, 0x5, 0x9, 0xE, 0xC, 0xA, 0x4 }, |
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74 { 0xE, 0XC, 0XB, 0X8, 0X1, 0X2, 0X3, 0X5, 0XF, 0X4, 0XA, 0X6, 0X7, 0X0, 0X9, 0XD }, |
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75 { 0XB, 0XA, 0X5, 0XE, 0X6, 0XD, 0X9, 0X0, 0XC, 0X8, 0XF, 0X3, 0X2, 0X4, 0X7, 0X1 }, |
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76 { 0XD, 0X7, 0XF, 0X4, 0X1, 0X2, 0X6, 0XE, 0X9, 0XB, 0X3, 0X0, 0X8, 0X5, 0XC, 0XA } |
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77 }, |
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78 { |
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79 { 0X2, 0X8, 0XB, 0XD, 0XF, 0X7, 0X6, 0XE, 0X3, 0X1, 0X9, 0X4, 0X0, 0XA, 0XC, 0X5 }, |
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80 { 0X1, 0XE, 0X2, 0XB, 0X4, 0XC, 0X3, 0X7, 0X6, 0XD, 0XA, 0X5, 0XF, 0X9, 0X0, 0X8 }, |
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81 { 0X4, 0XC, 0X7, 0X5, 0X1, 0X6, 0X9, 0XA, 0X0, 0XE, 0XD, 0X8, 0X2, 0XB, 0X3, 0XF }, |
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82 { 0xB, 0X9, 0X5, 0X1, 0XC, 0X3, 0XD, 0XE, 0X6, 0X4, 0X7, 0XF, 0X2, 0X0, 0X8, 0XA } |
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83 } |
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84 }; |
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85 |
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86 /* computes S_i[x] */ |
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87 #ifdef LTC_CLEAN_STACK |
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88 static ulong32 _sbox(int i, ulong32 x) |
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89 #else |
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90 static ulong32 sbox(int i, ulong32 x) |
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91 #endif |
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92 { |
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93 unsigned char a0,b0,a1,b1,a2,b2,a3,b3,a4,b4,y; |
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94 |
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95 /* a0,b0 = [x/16], x mod 16 */ |
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96 a0 = (unsigned char)((x>>4)&15); |
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97 b0 = (unsigned char)((x)&15); |
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98 |
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99 /* a1 = a0 ^ b0 */ |
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100 a1 = a0 ^ b0; |
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101 |
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102 /* b1 = a0 ^ ROR(b0, 1) ^ 8a0 */ |
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103 b1 = (a0 ^ ((b0<<3)|(b0>>1)) ^ (a0<<3)) & 15; |
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104 |
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105 /* a2,b2 = t0[a1], t1[b1] */ |
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106 a2 = qbox[i][0][(int)a1]; |
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107 b2 = qbox[i][1][(int)b1]; |
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108 |
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109 /* a3 = a2 ^ b2 */ |
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110 a3 = a2 ^ b2; |
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111 |
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112 /* b3 = a2 ^ ROR(b2, 1) ^ 8a2 */ |
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113 b3 = (a2 ^ ((b2<<3)|(b2>>1)) ^ (a2<<3)) & 15; |
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114 |
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115 /* a4,b4 = t2[a3], t3[b3] */ |
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116 a4 = qbox[i][2][(int)a3]; |
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117 b4 = qbox[i][3][(int)b3]; |
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118 |
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119 /* y = 16b4 + a4 */ |
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120 y = (b4 << 4) + a4; |
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121 |
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122 /* return result */ |
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123 return (ulong32)y; |
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124 } |
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125 |
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126 #ifdef LTC_CLEAN_STACK |
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127 static ulong32 sbox(int i, ulong32 x) |
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128 { |
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129 ulong32 y; |
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130 y = _sbox(i, x); |
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131 burn_stack(sizeof(unsigned char) * 11); |
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132 return y; |
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133 } |
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134 #endif /* LTC_CLEAN_STACK */ |
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135 |
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136 #endif /* LTC_TWOFISH_TABLES */ |
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137 |
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138 /* computes ab mod p */ |
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139 static ulong32 gf_mult(ulong32 a, ulong32 b, ulong32 p) |
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140 { |
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141 ulong32 result, B[2], P[2]; |
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142 |
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143 P[1] = p; |
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144 B[1] = b; |
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145 result = P[0] = B[0] = 0; |
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146 |
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147 /* unrolled branchless GF multiplier */ |
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148 result ^= B[a&1]; a >>= 1; B[1] = P[B[1]>>7] ^ (B[1] << 1); |
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149 result ^= B[a&1]; a >>= 1; B[1] = P[B[1]>>7] ^ (B[1] << 1); |
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150 result ^= B[a&1]; a >>= 1; B[1] = P[B[1]>>7] ^ (B[1] << 1); |
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151 result ^= B[a&1]; a >>= 1; B[1] = P[B[1]>>7] ^ (B[1] << 1); |
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152 result ^= B[a&1]; a >>= 1; B[1] = P[B[1]>>7] ^ (B[1] << 1); |
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153 result ^= B[a&1]; a >>= 1; B[1] = P[B[1]>>7] ^ (B[1] << 1); |
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154 result ^= B[a&1]; a >>= 1; B[1] = P[B[1]>>7] ^ (B[1] << 1); |
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155 result ^= B[a&1]; |
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156 |
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157 return result; |
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158 } |
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159 |
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160 /* computes [y0 y1 y2 y3] = MDS . [x0] */ |
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161 #ifndef LTC_TWOFISH_TABLES |
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162 static ulong32 mds_column_mult(unsigned char in, int col) |
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163 { |
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164 ulong32 x01, x5B, xEF; |
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165 |
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166 x01 = in; |
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167 x5B = gf_mult(in, 0x5B, MDS_POLY); |
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168 xEF = gf_mult(in, 0xEF, MDS_POLY); |
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169 |
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170 switch (col) { |
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171 case 0: |
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172 return (x01 << 0 ) | |
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173 (x5B << 8 ) | |
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174 (xEF << 16) | |
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175 (xEF << 24); |
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176 case 1: |
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177 return (xEF << 0 ) | |
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178 (xEF << 8 ) | |
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179 (x5B << 16) | |
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180 (x01 << 24); |
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181 case 2: |
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182 return (x5B << 0 ) | |
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183 (xEF << 8 ) | |
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184 (x01 << 16) | |
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185 (xEF << 24); |
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186 case 3: |
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187 return (x5B << 0 ) | |
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188 (x01 << 8 ) | |
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189 (xEF << 16) | |
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190 (x5B << 24); |
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191 } |
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192 /* avoid warnings, we'd never get here normally but just to calm compiler warnings... */ |
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193 return 0; |
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194 } |
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195 |
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196 #else /* !LTC_TWOFISH_TABLES */ |
285
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197 |
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198 #define mds_column_mult(x, i) mds_tab[i][x] |
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199 |
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200 #endif /* LTC_TWOFISH_TABLES */ |
285
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201 |
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202 /* Computes [y0 y1 y2 y3] = MDS . [x0 x1 x2 x3] */ |
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203 static void mds_mult(const unsigned char *in, unsigned char *out) |
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204 { |
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205 int x; |
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206 ulong32 tmp; |
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207 for (tmp = x = 0; x < 4; x++) { |
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208 tmp ^= mds_column_mult(in[x], x); |
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209 } |
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210 STORE32L(tmp, out); |
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211 } |
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212 |
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213 #ifdef LTC_TWOFISH_ALL_TABLES |
285
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214 /* computes [y0 y1 y2 y3] = RS . [x0 x1 x2 x3 x4 x5 x6 x7] */ |
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215 static void rs_mult(const unsigned char *in, unsigned char *out) |
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216 { |
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217 ulong32 tmp; |
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218 tmp = rs_tab0[in[0]] ^ rs_tab1[in[1]] ^ rs_tab2[in[2]] ^ rs_tab3[in[3]] ^ |
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219 rs_tab4[in[4]] ^ rs_tab5[in[5]] ^ rs_tab6[in[6]] ^ rs_tab7[in[7]]; |
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220 STORE32L(tmp, out); |
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221 } |
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222 |
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223 #else /* !LTC_TWOFISH_ALL_TABLES */ |
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224 |
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225 /* computes [y0 y1 y2 y3] = RS . [x0 x1 x2 x3 x4 x5 x6 x7] */ |
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226 static void rs_mult(const unsigned char *in, unsigned char *out) |
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227 { |
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228 int x, y; |
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229 for (x = 0; x < 4; x++) { |
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230 out[x] = 0; |
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231 for (y = 0; y < 8; y++) { |
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232 out[x] ^= gf_mult(in[y], RS[x][y], RS_POLY); |
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233 } |
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234 } |
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235 } |
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236 |
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237 #endif |
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238 |
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239 /* computes h(x) */ |
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240 static void h_func(const unsigned char *in, unsigned char *out, unsigned char *M, int k, int offset) |
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241 { |
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242 int x; |
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243 unsigned char y[4]; |
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244 for (x = 0; x < 4; x++) { |
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245 y[x] = in[x]; |
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246 } |
285
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247 switch (k) { |
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248 case 4: |
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249 y[0] = (unsigned char)(sbox(1, (ulong32)y[0]) ^ M[4 * (6 + offset) + 0]); |
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250 y[1] = (unsigned char)(sbox(0, (ulong32)y[1]) ^ M[4 * (6 + offset) + 1]); |
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251 y[2] = (unsigned char)(sbox(0, (ulong32)y[2]) ^ M[4 * (6 + offset) + 2]); |
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252 y[3] = (unsigned char)(sbox(1, (ulong32)y[3]) ^ M[4 * (6 + offset) + 3]); |
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6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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253 /* FALLTHROUGH */ |
285
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254 case 3: |
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255 y[0] = (unsigned char)(sbox(1, (ulong32)y[0]) ^ M[4 * (4 + offset) + 0]); |
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256 y[1] = (unsigned char)(sbox(1, (ulong32)y[1]) ^ M[4 * (4 + offset) + 1]); |
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257 y[2] = (unsigned char)(sbox(0, (ulong32)y[2]) ^ M[4 * (4 + offset) + 2]); |
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258 y[3] = (unsigned char)(sbox(0, (ulong32)y[3]) ^ M[4 * (4 + offset) + 3]); |
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6dba84798cd5
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259 /* FALLTHROUGH */ |
285
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260 case 2: |
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261 y[0] = (unsigned char)(sbox(1, sbox(0, sbox(0, (ulong32)y[0]) ^ M[4 * (2 + offset) + 0]) ^ M[4 * (0 + offset) + 0])); |
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262 y[1] = (unsigned char)(sbox(0, sbox(0, sbox(1, (ulong32)y[1]) ^ M[4 * (2 + offset) + 1]) ^ M[4 * (0 + offset) + 1])); |
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263 y[2] = (unsigned char)(sbox(1, sbox(1, sbox(0, (ulong32)y[2]) ^ M[4 * (2 + offset) + 2]) ^ M[4 * (0 + offset) + 2])); |
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264 y[3] = (unsigned char)(sbox(0, sbox(1, sbox(1, (ulong32)y[3]) ^ M[4 * (2 + offset) + 3]) ^ M[4 * (0 + offset) + 3])); |
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6dba84798cd5
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265 /* FALLTHROUGH */ |
285
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266 } |
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267 mds_mult(y, out); |
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268 } |
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269 |
1435
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270 #ifndef LTC_TWOFISH_SMALL |
285
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271 |
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272 /* for GCC we don't use pointer aliases */ |
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273 #if defined(__GNUC__) |
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274 #define S1 skey->twofish.S[0] |
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275 #define S2 skey->twofish.S[1] |
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276 #define S3 skey->twofish.S[2] |
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277 #define S4 skey->twofish.S[3] |
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278 #endif |
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279 |
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280 /* the G function */ |
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281 #define g_func(x, dum) (S1[byte(x,0)] ^ S2[byte(x,1)] ^ S3[byte(x,2)] ^ S4[byte(x,3)]) |
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282 #define g1_func(x, dum) (S2[byte(x,0)] ^ S3[byte(x,1)] ^ S4[byte(x,2)] ^ S1[byte(x,3)]) |
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283 |
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284 #else |
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285 |
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286 #ifdef LTC_CLEAN_STACK |
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287 static ulong32 _g_func(ulong32 x, symmetric_key *key) |
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288 #else |
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289 static ulong32 g_func(ulong32 x, symmetric_key *key) |
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290 #endif |
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291 { |
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292 unsigned char g, i, y, z; |
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293 ulong32 res; |
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294 |
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295 res = 0; |
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296 for (y = 0; y < 4; y++) { |
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297 z = key->twofish.start; |
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298 |
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299 /* do unkeyed substitution */ |
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300 g = sbox(qord[y][z++], (x >> (8*y)) & 255); |
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301 |
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302 /* first subkey */ |
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303 i = 0; |
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304 |
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305 /* do key mixing+sbox until z==5 */ |
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306 while (z != 5) { |
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307 g = g ^ key->twofish.S[4*i++ + y]; |
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308 g = sbox(qord[y][z++], g); |
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309 } |
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310 |
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311 /* multiply g by a column of the MDS */ |
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312 res ^= mds_column_mult(g, y); |
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313 } |
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314 return res; |
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315 } |
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316 |
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317 #define g1_func(x, key) g_func(ROLc(x, 8), key) |
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318 |
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319 #ifdef LTC_CLEAN_STACK |
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320 static ulong32 g_func(ulong32 x, symmetric_key *key) |
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321 { |
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322 ulong32 y; |
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323 y = _g_func(x, key); |
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324 burn_stack(sizeof(unsigned char) * 4 + sizeof(ulong32)); |
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325 return y; |
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326 } |
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327 #endif /* LTC_CLEAN_STACK */ |
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328 |
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329 #endif /* LTC_TWOFISH_SMALL */ |
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330 |
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331 /** |
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332 Initialize the Twofish block cipher |
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333 @param key The symmetric key you wish to pass |
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334 @param keylen The key length in bytes |
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335 @param num_rounds The number of rounds desired (0 for default) |
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336 @param skey The key in as scheduled by this function. |
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337 @return CRYPT_OK if successful |
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338 */ |
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339 #ifdef LTC_CLEAN_STACK |
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340 static int _twofish_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey) |
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341 #else |
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342 int twofish_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey) |
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343 #endif |
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344 { |
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345 #ifndef LTC_TWOFISH_SMALL |
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346 unsigned char S[4*4], tmpx0, tmpx1; |
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347 #endif |
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348 int k, x, y; |
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349 unsigned char tmp[4], tmp2[4], M[8*4]; |
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350 ulong32 A, B; |
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351 |
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352 LTC_ARGCHK(key != NULL); |
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353 LTC_ARGCHK(skey != NULL); |
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354 |
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355 /* invalid arguments? */ |
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356 if (num_rounds != 16 && num_rounds != 0) { |
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357 return CRYPT_INVALID_ROUNDS; |
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358 } |
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359 |
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360 if (keylen != 16 && keylen != 24 && keylen != 32) { |
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361 return CRYPT_INVALID_KEYSIZE; |
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362 } |
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363 |
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364 /* k = keysize/64 [but since our keysize is in bytes...] */ |
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365 k = keylen / 8; |
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366 |
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367 /* copy the key into M */ |
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368 for (x = 0; x < keylen; x++) { |
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369 M[x] = key[x] & 255; |
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370 } |
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371 |
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372 /* create the S[..] words */ |
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373 #ifndef LTC_TWOFISH_SMALL |
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374 for (x = 0; x < k; x++) { |
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375 rs_mult(M+(x*8), S+(x*4)); |
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376 } |
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377 #else |
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378 for (x = 0; x < k; x++) { |
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379 rs_mult(M+(x*8), skey->twofish.S+(x*4)); |
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380 } |
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381 #endif |
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382 |
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383 /* make subkeys */ |
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384 for (x = 0; x < 20; x++) { |
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385 /* A = h(p * 2x, Me) */ |
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386 for (y = 0; y < 4; y++) { |
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387 tmp[y] = x+x; |
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388 } |
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389 h_func(tmp, tmp2, M, k, 0); |
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390 LOAD32L(A, tmp2); |
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391 |
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392 /* B = ROL(h(p * (2x + 1), Mo), 8) */ |
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393 for (y = 0; y < 4; y++) { |
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394 tmp[y] = (unsigned char)(x+x+1); |
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395 } |
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396 h_func(tmp, tmp2, M, k, 1); |
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397 LOAD32L(B, tmp2); |
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398 B = ROLc(B, 8); |
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399 |
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400 /* K[2i] = A + B */ |
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401 skey->twofish.K[x+x] = (A + B) & 0xFFFFFFFFUL; |
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402 |
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403 /* K[2i+1] = (A + 2B) <<< 9 */ |
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404 skey->twofish.K[x+x+1] = ROLc(B + B + A, 9); |
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405 } |
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
406 |
1435
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update to libtomcrypt 1.17 (with Dropbear changes)
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diff
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|
407 #ifndef LTC_TWOFISH_SMALL |
285
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parents:
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|
408 /* make the sboxes (large ram variant) */ |
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parents:
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|
409 if (k == 2) { |
1b9e69c058d2
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parents:
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|
410 for (x = 0; x < 256; x++) { |
382
0cbe8f6dbf9e
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|
411 tmpx0 = (unsigned char)sbox(0, x); |
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412 tmpx1 = (unsigned char)sbox(1, x); |
285
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parents:
diff
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|
413 skey->twofish.S[0][x] = mds_column_mult(sbox(1, (sbox(0, tmpx0 ^ S[0]) ^ S[4])),0); |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
414 skey->twofish.S[1][x] = mds_column_mult(sbox(0, (sbox(0, tmpx1 ^ S[1]) ^ S[5])),1); |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
415 skey->twofish.S[2][x] = mds_column_mult(sbox(1, (sbox(1, tmpx0 ^ S[2]) ^ S[6])),2); |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
416 skey->twofish.S[3][x] = mds_column_mult(sbox(0, (sbox(1, tmpx1 ^ S[3]) ^ S[7])),3); |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
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|
417 } |
1b9e69c058d2
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418 } else if (k == 3) { |
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419 for (x = 0; x < 256; x++) { |
382
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420 tmpx0 = (unsigned char)sbox(0, x); |
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421 tmpx1 = (unsigned char)sbox(1, x); |
285
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
422 skey->twofish.S[0][x] = mds_column_mult(sbox(1, (sbox(0, sbox(0, tmpx1 ^ S[0]) ^ S[4]) ^ S[8])),0); |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
423 skey->twofish.S[1][x] = mds_column_mult(sbox(0, (sbox(0, sbox(1, tmpx1 ^ S[1]) ^ S[5]) ^ S[9])),1); |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
424 skey->twofish.S[2][x] = mds_column_mult(sbox(1, (sbox(1, sbox(0, tmpx0 ^ S[2]) ^ S[6]) ^ S[10])),2); |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
425 skey->twofish.S[3][x] = mds_column_mult(sbox(0, (sbox(1, sbox(1, tmpx0 ^ S[3]) ^ S[7]) ^ S[11])),3); |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
426 } |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
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|
427 } else { |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
428 for (x = 0; x < 256; x++) { |
382
0cbe8f6dbf9e
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diff
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429 tmpx0 = (unsigned char)sbox(0, x); |
0cbe8f6dbf9e
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diff
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|
430 tmpx1 = (unsigned char)sbox(1, x); |
285
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
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431 skey->twofish.S[0][x] = mds_column_mult(sbox(1, (sbox(0, sbox(0, sbox(1, tmpx1 ^ S[0]) ^ S[4]) ^ S[8]) ^ S[12])),0); |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
432 skey->twofish.S[1][x] = mds_column_mult(sbox(0, (sbox(0, sbox(1, sbox(1, tmpx0 ^ S[1]) ^ S[5]) ^ S[9]) ^ S[13])),1); |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
433 skey->twofish.S[2][x] = mds_column_mult(sbox(1, (sbox(1, sbox(0, sbox(0, tmpx0 ^ S[2]) ^ S[6]) ^ S[10]) ^ S[14])),2); |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
434 skey->twofish.S[3][x] = mds_column_mult(sbox(0, (sbox(1, sbox(1, sbox(0, tmpx1 ^ S[3]) ^ S[7]) ^ S[11]) ^ S[15])),3); |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
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|
435 } |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
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436 } |
1b9e69c058d2
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|
437 #else |
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438 /* where to start in the sbox layers */ |
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diff
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|
439 /* small ram variant */ |
1b9e69c058d2
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440 switch (k) { |
1b9e69c058d2
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diff
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441 case 4 : skey->twofish.start = 0; break; |
1710
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Fix whitespace changes vs upstream libtomcrypt
Matt Johnston <matt@ucc.asn.au>
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442 case 3 : skey->twofish.start = 1; break; |
285
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443 default: skey->twofish.start = 2; break; |
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444 } |
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445 #endif |
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446 return CRYPT_OK; |
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|
447 } |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
448 |
1b9e69c058d2
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|
449 #ifdef LTC_CLEAN_STACK |
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Matt Johnston <matt@ucc.asn.au>
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450 int twofish_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey) |
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diff
changeset
|
451 { |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
452 int x; |
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Matt Johnston <matt@ucc.asn.au>
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diff
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453 x = _twofish_setup(key, keylen, num_rounds, skey); |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
454 burn_stack(sizeof(int) * 7 + sizeof(unsigned char) * 56 + sizeof(ulong32) * 2); |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
455 return x; |
1b9e69c058d2
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parents:
diff
changeset
|
456 } |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
457 #endif |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
458 |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
459 /** |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
460 Encrypts a block of text with Twofish |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
461 @param pt The input plaintext (16 bytes) |
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parents:
diff
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|
462 @param ct The output ciphertext (16 bytes) |
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
463 @param skey The key as scheduled |
382
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285
diff
changeset
|
464 @return CRYPT_OK if successful |
285
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parents:
diff
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|
465 */ |
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Matt Johnston <matt@ucc.asn.au>
parents:
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|
466 #ifdef LTC_CLEAN_STACK |
382
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285
diff
changeset
|
467 static int _twofish_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey) |
285
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parents:
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changeset
|
468 #else |
382
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Matt Johnston <matt@ucc.asn.au>
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285
diff
changeset
|
469 int twofish_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey) |
285
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parents:
diff
changeset
|
470 #endif |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
471 { |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
472 ulong32 a,b,c,d,ta,tb,tc,td,t1,t2, *k; |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
473 int r; |
1435
f849a5ca2efc
update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
1091
diff
changeset
|
474 #if !defined(LTC_TWOFISH_SMALL) && !defined(__GNUC__) |
285
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
475 ulong32 *S1, *S2, *S3, *S4; |
1710
1ff2a1034c52
Fix whitespace changes vs upstream libtomcrypt
Matt Johnston <matt@ucc.asn.au>
parents:
1471
diff
changeset
|
476 #endif |
285
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
477 |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
478 LTC_ARGCHK(pt != NULL); |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
479 LTC_ARGCHK(ct != NULL); |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
480 LTC_ARGCHK(skey != NULL); |
1710
1ff2a1034c52
Fix whitespace changes vs upstream libtomcrypt
Matt Johnston <matt@ucc.asn.au>
parents:
1471
diff
changeset
|
481 |
1435
f849a5ca2efc
update to libtomcrypt 1.17 (with Dropbear changes)
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482 #if !defined(LTC_TWOFISH_SMALL) && !defined(__GNUC__) |
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483 S1 = skey->twofish.S[0]; |
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484 S2 = skey->twofish.S[1]; |
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485 S3 = skey->twofish.S[2]; |
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486 S4 = skey->twofish.S[3]; |
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487 #endif |
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488 |
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489 LOAD32L(a,&pt[0]); LOAD32L(b,&pt[4]); |
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490 LOAD32L(c,&pt[8]); LOAD32L(d,&pt[12]); |
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491 a ^= skey->twofish.K[0]; |
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492 b ^= skey->twofish.K[1]; |
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493 c ^= skey->twofish.K[2]; |
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494 d ^= skey->twofish.K[3]; |
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495 |
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496 k = skey->twofish.K + 8; |
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497 for (r = 8; r != 0; --r) { |
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498 t2 = g1_func(b, skey); |
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499 t1 = g_func(a, skey) + t2; |
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500 c = RORc(c ^ (t1 + k[0]), 1); |
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501 d = ROLc(d, 1) ^ (t2 + t1 + k[1]); |
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502 |
285
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503 t2 = g1_func(d, skey); |
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504 t1 = g_func(c, skey) + t2; |
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505 a = RORc(a ^ (t1 + k[2]), 1); |
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506 b = ROLc(b, 1) ^ (t2 + t1 + k[3]); |
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507 k += 4; |
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508 } |
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509 |
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510 /* output with "undo last swap" */ |
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511 ta = c ^ skey->twofish.K[4]; |
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512 tb = d ^ skey->twofish.K[5]; |
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513 tc = a ^ skey->twofish.K[6]; |
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514 td = b ^ skey->twofish.K[7]; |
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515 |
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516 /* store output */ |
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517 STORE32L(ta,&ct[0]); STORE32L(tb,&ct[4]); |
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518 STORE32L(tc,&ct[8]); STORE32L(td,&ct[12]); |
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519 |
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520 return CRYPT_OK; |
285
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521 } |
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522 |
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523 #ifdef LTC_CLEAN_STACK |
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524 int twofish_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey) |
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525 { |
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526 int err = _twofish_ecb_encrypt(pt, ct, skey); |
285
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527 burn_stack(sizeof(ulong32) * 10 + sizeof(int)); |
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528 return err; |
285
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529 } |
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530 #endif |
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531 |
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532 /** |
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533 Decrypts a block of text with Twofish |
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534 @param ct The input ciphertext (16 bytes) |
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535 @param pt The output plaintext (16 bytes) |
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536 @param skey The key as scheduled |
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537 @return CRYPT_OK if successful |
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538 */ |
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539 #ifdef LTC_CLEAN_STACK |
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540 static int _twofish_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey) |
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541 #else |
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542 int twofish_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey) |
285
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543 #endif |
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544 { |
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545 ulong32 a,b,c,d,ta,tb,tc,td,t1,t2, *k; |
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546 int r; |
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547 #if !defined(LTC_TWOFISH_SMALL) && !defined(__GNUC__) |
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548 ulong32 *S1, *S2, *S3, *S4; |
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549 #endif |
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550 |
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551 LTC_ARGCHK(pt != NULL); |
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552 LTC_ARGCHK(ct != NULL); |
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553 LTC_ARGCHK(skey != NULL); |
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554 |
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555 #if !defined(LTC_TWOFISH_SMALL) && !defined(__GNUC__) |
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556 S1 = skey->twofish.S[0]; |
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557 S2 = skey->twofish.S[1]; |
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558 S3 = skey->twofish.S[2]; |
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559 S4 = skey->twofish.S[3]; |
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560 #endif |
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561 |
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562 /* load input */ |
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563 LOAD32L(ta,&ct[0]); LOAD32L(tb,&ct[4]); |
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Matt Johnston <matt@ucc.asn.au>
parents:
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564 LOAD32L(tc,&ct[8]); LOAD32L(td,&ct[12]); |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
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|
565 |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
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|
566 /* undo undo final swap */ |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
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567 a = tc ^ skey->twofish.K[6]; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
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568 b = td ^ skey->twofish.K[7]; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
569 c = ta ^ skey->twofish.K[4]; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
570 d = tb ^ skey->twofish.K[5]; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
571 |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
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572 k = skey->twofish.K + 36; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
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|
573 for (r = 8; r != 0; --r) { |
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Matt Johnston <matt@ucc.asn.au>
parents:
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|
574 t2 = g1_func(d, skey); |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
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|
575 t1 = g_func(c, skey) + t2; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
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576 a = ROLc(a, 1) ^ (t1 + k[2]); |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
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577 b = RORc(b ^ (t2 + t1 + k[3]), 1); |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
578 |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
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579 t2 = g1_func(b, skey); |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
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|
580 t1 = g_func(a, skey) + t2; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
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581 c = ROLc(c, 1) ^ (t1 + k[0]); |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
582 d = RORc(d ^ (t2 + t1 + k[1]), 1); |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
583 k -= 4; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
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|
584 } |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
585 |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
586 /* pre-white */ |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
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changeset
|
587 a ^= skey->twofish.K[0]; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
588 b ^= skey->twofish.K[1]; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
589 c ^= skey->twofish.K[2]; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
590 d ^= skey->twofish.K[3]; |
1710
1ff2a1034c52
Fix whitespace changes vs upstream libtomcrypt
Matt Johnston <matt@ucc.asn.au>
parents:
1471
diff
changeset
|
591 |
285
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
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|
592 /* store */ |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
593 STORE32L(a, &pt[0]); STORE32L(b, &pt[4]); |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
594 STORE32L(c, &pt[8]); STORE32L(d, &pt[12]); |
382
0cbe8f6dbf9e
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Matt Johnston <matt@ucc.asn.au>
parents:
285
diff
changeset
|
595 return CRYPT_OK; |
285
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Matt Johnston <matt@ucc.asn.au>
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|
596 } |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
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|
597 |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
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|
598 #ifdef LTC_CLEAN_STACK |
382
0cbe8f6dbf9e
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Matt Johnston <matt@ucc.asn.au>
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285
diff
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599 int twofish_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey) |
285
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Matt Johnston <matt@ucc.asn.au>
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600 { |
382
0cbe8f6dbf9e
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Matt Johnston <matt@ucc.asn.au>
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285
diff
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601 int err =_twofish_ecb_decrypt(ct, pt, skey); |
285
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
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602 burn_stack(sizeof(ulong32) * 10 + sizeof(int)); |
382
0cbe8f6dbf9e
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Matt Johnston <matt@ucc.asn.au>
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285
diff
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603 return err; |
285
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Matt Johnston <matt@ucc.asn.au>
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604 } |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
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|
605 #endif |
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Matt Johnston <matt@ucc.asn.au>
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|
606 |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
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|
607 /** |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
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diff
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608 Performs a self-test of the Twofish block cipher |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
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|
609 @return CRYPT_OK if functional, CRYPT_NOP if self-test has been disabled |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
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diff
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|
610 */ |
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
611 int twofish_test(void) |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
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|
612 { |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
613 #ifndef LTC_TEST |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
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diff
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|
614 return CRYPT_NOP; |
1710
1ff2a1034c52
Fix whitespace changes vs upstream libtomcrypt
Matt Johnston <matt@ucc.asn.au>
parents:
1471
diff
changeset
|
615 #else |
1ff2a1034c52
Fix whitespace changes vs upstream libtomcrypt
Matt Johnston <matt@ucc.asn.au>
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|
616 static const struct { |
285
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Matt Johnston <matt@ucc.asn.au>
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|
617 int keylen; |
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
618 unsigned char key[32], pt[16], ct[16]; |
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Matt Johnston <matt@ucc.asn.au>
parents:
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|
619 } tests[] = { |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
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diff
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|
620 { 16, |
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
621 { 0x9F, 0x58, 0x9F, 0x5C, 0xF6, 0x12, 0x2C, 0x32, |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
622 0xB6, 0xBF, 0xEC, 0x2F, 0x2A, 0xE8, 0xC3, 0x5A }, |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
623 { 0xD4, 0x91, 0xDB, 0x16, 0xE7, 0xB1, 0xC3, 0x9E, |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
624 0x86, 0xCB, 0x08, 0x6B, 0x78, 0x9F, 0x54, 0x19 }, |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
625 { 0x01, 0x9F, 0x98, 0x09, 0xDE, 0x17, 0x11, 0x85, |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
626 0x8F, 0xAA, 0xC3, 0xA3, 0xBA, 0x20, 0xFB, 0xC3 } |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
627 }, { |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
628 24, |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
629 { 0x88, 0xB2, 0xB2, 0x70, 0x6B, 0x10, 0x5E, 0x36, |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
630 0xB4, 0x46, 0xBB, 0x6D, 0x73, 0x1A, 0x1E, 0x88, |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
631 0xEF, 0xA7, 0x1F, 0x78, 0x89, 0x65, 0xBD, 0x44 }, |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
632 { 0x39, 0xDA, 0x69, 0xD6, 0xBA, 0x49, 0x97, 0xD5, |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
633 0x85, 0xB6, 0xDC, 0x07, 0x3C, 0xA3, 0x41, 0xB2 }, |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
634 { 0x18, 0x2B, 0x02, 0xD8, 0x14, 0x97, 0xEA, 0x45, |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
635 0xF9, 0xDA, 0xAC, 0xDC, 0x29, 0x19, 0x3A, 0x65 } |
1710
1ff2a1034c52
Fix whitespace changes vs upstream libtomcrypt
Matt Johnston <matt@ucc.asn.au>
parents:
1471
diff
changeset
|
636 }, { |
285
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
637 32, |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
638 { 0xD4, 0x3B, 0xB7, 0x55, 0x6E, 0xA3, 0x2E, 0x46, |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
639 0xF2, 0xA2, 0x82, 0xB7, 0xD4, 0x5B, 0x4E, 0x0D, |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
640 0x57, 0xFF, 0x73, 0x9D, 0x4D, 0xC9, 0x2C, 0x1B, |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
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641 0xD7, 0xFC, 0x01, 0x70, 0x0C, 0xC8, 0x21, 0x6F }, |
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642 { 0x90, 0xAF, 0xE9, 0x1B, 0xB2, 0x88, 0x54, 0x4F, |
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643 0x2C, 0x32, 0xDC, 0x23, 0x9B, 0x26, 0x35, 0xE6 }, |
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644 { 0x6C, 0xB4, 0x56, 0x1C, 0x40, 0xBF, 0x0A, 0x97, |
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645 0x05, 0x93, 0x1C, 0xB6, 0xD4, 0x08, 0xE7, 0xFA } |
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646 } |
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647 }; |
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648 |
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649 |
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650 symmetric_key key; |
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651 unsigned char tmp[2][16]; |
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652 int err, i, y; |
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653 |
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654 for (i = 0; i < (int)(sizeof(tests)/sizeof(tests[0])); i++) { |
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655 if ((err = twofish_setup(tests[i].key, tests[i].keylen, 0, &key)) != CRYPT_OK) { |
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656 return err; |
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657 } |
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658 twofish_ecb_encrypt(tests[i].pt, tmp[0], &key); |
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659 twofish_ecb_decrypt(tmp[0], tmp[1], &key); |
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660 if (compare_testvector(tmp[0], 16, tests[i].ct, 16, "Twofish Encrypt", i) != 0 || |
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661 compare_testvector(tmp[1], 16, tests[i].pt, 16, "Twofish Decrypt", i) != 0) { |
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662 return CRYPT_FAIL_TESTVECTOR; |
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663 } |
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664 /* now see if we can encrypt all zero bytes 1000 times, decrypt and come back where we started */ |
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665 for (y = 0; y < 16; y++) tmp[0][y] = 0; |
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666 for (y = 0; y < 1000; y++) twofish_ecb_encrypt(tmp[0], tmp[0], &key); |
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667 for (y = 0; y < 1000; y++) twofish_ecb_decrypt(tmp[0], tmp[0], &key); |
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668 for (y = 0; y < 16; y++) if (tmp[0][y] != 0) return CRYPT_FAIL_TESTVECTOR; |
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669 } |
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670 return CRYPT_OK; |
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671 #endif |
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672 } |
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673 |
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674 /** Terminate the context |
285
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675 @param skey The scheduled key |
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676 */ |
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677 void twofish_done(symmetric_key *skey) |
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678 { |
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679 LTC_UNUSED_PARAM(skey); |
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680 } |
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681 |
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682 /** |
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683 Gets suitable key size |
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684 @param keysize [in/out] The length of the recommended key (in bytes). This function will store the suitable size back in this variable. |
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685 @return CRYPT_OK if the input key size is acceptable. |
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686 */ |
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687 int twofish_keysize(int *keysize) |
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688 { |
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689 LTC_ARGCHK(keysize); |
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690 if (*keysize < 16) |
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691 return CRYPT_INVALID_KEYSIZE; |
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692 if (*keysize < 24) { |
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693 *keysize = 16; |
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694 return CRYPT_OK; |
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695 } else if (*keysize < 32) { |
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696 *keysize = 24; |
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697 return CRYPT_OK; |
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698 } else { |
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699 *keysize = 32; |
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700 return CRYPT_OK; |
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701 } |
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702 } |
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703 |
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704 #endif |
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705 |
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706 |
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707 |
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708 |
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709 /* ref: $Format:%D$ */ |
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710 /* git commit: $Format:%H$ */ |
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711 /* commit time: $Format:%ai$ */ |