Mercurial > dropbear
annotate libtomcrypt/src/ciphers/kasumi.c @ 1273:139935236c72
const variables
author | Francois Perrad <francois.perrad@gadz.org> |
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date | Fri, 01 Jan 2016 09:20:50 +0100 |
parents | 0cbe8f6dbf9e |
children | f849a5ca2efc |
rev | line source |
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382
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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 * Tom St Denis, [email protected], http://libtomcrypt.com |
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10 */ |
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11 |
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12 /** |
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13 @file kasumi.c |
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14 Implementation of the 3GPP Kasumi block cipher |
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15 Derived from the 3GPP standard source code |
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16 */ |
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17 |
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18 #include "tomcrypt.h" |
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19 |
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20 #ifdef LTC_KASUMI |
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21 |
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22 typedef unsigned u16; |
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23 |
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24 #define ROL16(x, y) ((((x)<<(y)) | ((x)>>(16-(y)))) & 0xFFFF) |
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25 |
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26 const struct ltc_cipher_descriptor kasumi_desc = { |
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27 "kasumi", |
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28 21, |
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29 16, 16, 8, 8, |
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30 &kasumi_setup, |
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31 &kasumi_ecb_encrypt, |
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32 &kasumi_ecb_decrypt, |
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33 &kasumi_test, |
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34 &kasumi_done, |
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35 &kasumi_keysize, |
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36 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 static u16 FI( u16 in, u16 subkey ) |
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40 { |
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41 u16 nine, seven; |
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42 static const u16 S7[128] = { |
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43 54, 50, 62, 56, 22, 34, 94, 96, 38, 6, 63, 93, 2, 18,123, 33, |
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44 55,113, 39,114, 21, 67, 65, 12, 47, 73, 46, 27, 25,111,124, 81, |
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45 53, 9,121, 79, 52, 60, 58, 48,101,127, 40,120,104, 70, 71, 43, |
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46 20,122, 72, 61, 23,109, 13,100, 77, 1, 16, 7, 82, 10,105, 98, |
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47 117,116, 76, 11, 89,106, 0,125,118, 99, 86, 69, 30, 57,126, 87, |
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48 112, 51, 17, 5, 95, 14, 90, 84, 91, 8, 35,103, 32, 97, 28, 66, |
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49 102, 31, 26, 45, 75, 4, 85, 92, 37, 74, 80, 49, 68, 29,115, 44, |
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50 64,107,108, 24,110, 83, 36, 78, 42, 19, 15, 41, 88,119, 59, 3 }; |
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51 static const u16 S9[512] = { |
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52 167,239,161,379,391,334, 9,338, 38,226, 48,358,452,385, 90,397, |
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53 183,253,147,331,415,340, 51,362,306,500,262, 82,216,159,356,177, |
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54 175,241,489, 37,206, 17, 0,333, 44,254,378, 58,143,220, 81,400, |
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55 95, 3,315,245, 54,235,218,405,472,264,172,494,371,290,399, 76, |
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56 165,197,395,121,257,480,423,212,240, 28,462,176,406,507,288,223, |
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57 501,407,249,265, 89,186,221,428,164, 74,440,196,458,421,350,163, |
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58 232,158,134,354, 13,250,491,142,191, 69,193,425,152,227,366,135, |
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59 344,300,276,242,437,320,113,278, 11,243, 87,317, 36, 93,496, 27, |
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60 487,446,482, 41, 68,156,457,131,326,403,339, 20, 39,115,442,124, |
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61 475,384,508, 53,112,170,479,151,126,169, 73,268,279,321,168,364, |
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62 363,292, 46,499,393,327,324, 24,456,267,157,460,488,426,309,229, |
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63 439,506,208,271,349,401,434,236, 16,209,359, 52, 56,120,199,277, |
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64 465,416,252,287,246, 6, 83,305,420,345,153,502, 65, 61,244,282, |
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65 173,222,418, 67,386,368,261,101,476,291,195,430, 49, 79,166,330, |
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66 280,383,373,128,382,408,155,495,367,388,274,107,459,417, 62,454, |
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67 132,225,203,316,234, 14,301, 91,503,286,424,211,347,307,140,374, |
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68 35,103,125,427, 19,214,453,146,498,314,444,230,256,329,198,285, |
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69 50,116, 78,410, 10,205,510,171,231, 45,139,467, 29, 86,505, 32, |
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70 72, 26,342,150,313,490,431,238,411,325,149,473, 40,119,174,355, |
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71 185,233,389, 71,448,273,372, 55,110,178,322, 12,469,392,369,190, |
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72 1,109,375,137,181, 88, 75,308,260,484, 98,272,370,275,412,111, |
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Matt Johnston <matt@ucc.asn.au>
parents:
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|
73 336,318, 4,504,492,259,304, 77,337,435, 21,357,303,332,483, 18, |
0cbe8f6dbf9e
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Matt Johnston <matt@ucc.asn.au>
parents:
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74 47, 85, 25,497,474,289,100,269,296,478,270,106, 31,104,433, 84, |
0cbe8f6dbf9e
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Matt Johnston <matt@ucc.asn.au>
parents:
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|
75 414,486,394, 96, 99,154,511,148,413,361,409,255,162,215,302,201, |
0cbe8f6dbf9e
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
Matt Johnston <matt@ucc.asn.au>
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76 266,351,343,144,441,365,108,298,251, 34,182,509,138,210,335,133, |
0cbe8f6dbf9e
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
Matt Johnston <matt@ucc.asn.au>
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77 311,352,328,141,396,346,123,319,450,281,429,228,443,481, 92,404, |
0cbe8f6dbf9e
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
Matt Johnston <matt@ucc.asn.au>
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78 485,422,248,297, 23,213,130,466, 22,217,283, 70,294,360,419,127, |
0cbe8f6dbf9e
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
Matt Johnston <matt@ucc.asn.au>
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79 312,377, 7,468,194, 2,117,295,463,258,224,447,247,187, 80,398, |
0cbe8f6dbf9e
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
Matt Johnston <matt@ucc.asn.au>
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80 284,353,105,390,299,471,470,184, 57,200,348, 63,204,188, 33,451, |
0cbe8f6dbf9e
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
Matt Johnston <matt@ucc.asn.au>
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81 97, 30,310,219, 94,160,129,493, 64,179,263,102,189,207,114,402, |
0cbe8f6dbf9e
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Matt Johnston <matt@ucc.asn.au>
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82 438,477,387,122,192, 42,381, 5,145,118,180,449,293,323,136,380, |
0cbe8f6dbf9e
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Matt Johnston <matt@ucc.asn.au>
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83 43, 66, 60,455,341,445,202,432, 8,237, 15,376,436,464, 59,461}; |
0cbe8f6dbf9e
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84 |
0cbe8f6dbf9e
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85 /* The sixteen bit input is split into two unequal halves, * |
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Matt Johnston <matt@ucc.asn.au>
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86 * nine bits and seven bits - as is the subkey */ |
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87 |
0cbe8f6dbf9e
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88 nine = (u16)(in>>7)&0x1FF; |
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89 seven = (u16)(in&0x7F); |
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90 |
0cbe8f6dbf9e
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91 /* Now run the various operations */ |
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92 nine = (u16)(S9[nine] ^ seven); |
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93 seven = (u16)(S7[seven] ^ (nine & 0x7F)); |
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94 seven ^= (subkey>>9); |
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95 nine ^= (subkey&0x1FF); |
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96 nine = (u16)(S9[nine] ^ seven); |
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97 seven = (u16)(S7[seven] ^ (nine & 0x7F)); |
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98 return (u16)(seven<<9) + nine; |
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99 } |
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100 |
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101 static ulong32 FO( ulong32 in, int round_no, symmetric_key *key) |
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102 { |
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103 u16 left, right; |
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104 |
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105 /* Split the input into two 16-bit words */ |
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106 left = (u16)(in>>16); |
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107 right = (u16) in&0xFFFF; |
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108 |
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109 /* Now apply the same basic transformation three times */ |
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110 left ^= key->kasumi.KOi1[round_no]; |
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111 left = FI( left, key->kasumi.KIi1[round_no] ); |
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112 left ^= right; |
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113 |
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114 right ^= key->kasumi.KOi2[round_no]; |
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115 right = FI( right, key->kasumi.KIi2[round_no] ); |
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116 right ^= left; |
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117 |
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118 left ^= key->kasumi.KOi3[round_no]; |
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119 left = FI( left, key->kasumi.KIi3[round_no] ); |
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120 left ^= right; |
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121 |
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122 return (((ulong32)right)<<16)+left; |
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123 } |
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124 |
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125 static ulong32 FL( ulong32 in, int round_no, symmetric_key *key ) |
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126 { |
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127 u16 l, r, a, b; |
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128 /* split out the left and right halves */ |
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129 l = (u16)(in>>16); |
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130 r = (u16)(in)&0xFFFF; |
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131 /* do the FL() operations */ |
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132 a = (u16) (l & key->kasumi.KLi1[round_no]); |
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133 r ^= ROL16(a,1); |
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134 b = (u16)(r | key->kasumi.KLi2[round_no]); |
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135 l ^= ROL16(b,1); |
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136 /* put the two halves back together */ |
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137 |
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138 return (((ulong32)l)<<16) + r; |
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139 } |
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140 |
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141 int kasumi_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey) |
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142 { |
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143 ulong32 left, right, temp; |
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144 int n; |
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145 |
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146 LTC_ARGCHK(pt != NULL); |
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147 LTC_ARGCHK(ct != NULL); |
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Matt Johnston <matt@ucc.asn.au>
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148 LTC_ARGCHK(skey != NULL); |
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
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149 |
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150 LOAD32H(left, pt); |
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151 LOAD32H(right, pt+4); |
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152 |
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153 for (n = 0; n <= 7; ) { |
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154 temp = FL(left, n, skey); |
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Matt Johnston <matt@ucc.asn.au>
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155 temp = FO(temp, n++, skey); |
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Matt Johnston <matt@ucc.asn.au>
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156 right ^= temp; |
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157 temp = FO(right, n, skey); |
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Matt Johnston <matt@ucc.asn.au>
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158 temp = FL(temp, n++, skey); |
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Matt Johnston <matt@ucc.asn.au>
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159 left ^= temp; |
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160 } |
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161 |
0cbe8f6dbf9e
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162 STORE32H(left, ct); |
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163 STORE32H(right, ct+4); |
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164 |
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165 return CRYPT_OK; |
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166 } |
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167 |
0cbe8f6dbf9e
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168 int kasumi_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey) |
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169 { |
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170 ulong32 left, right, temp; |
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171 int n; |
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172 |
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173 LTC_ARGCHK(pt != NULL); |
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Matt Johnston <matt@ucc.asn.au>
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174 LTC_ARGCHK(ct != NULL); |
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Matt Johnston <matt@ucc.asn.au>
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175 LTC_ARGCHK(skey != NULL); |
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176 |
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Matt Johnston <matt@ucc.asn.au>
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177 LOAD32H(left, ct); |
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178 LOAD32H(right, ct+4); |
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179 |
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180 for (n = 7; n >= 0; ) { |
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181 temp = FO(right, n, skey); |
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Matt Johnston <matt@ucc.asn.au>
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182 temp = FL(temp, n--, skey); |
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Matt Johnston <matt@ucc.asn.au>
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183 left ^= temp; |
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184 temp = FL(left, n, skey); |
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185 temp = FO(temp, n--, skey); |
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186 right ^= temp; |
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187 } |
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188 |
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189 STORE32H(left, pt); |
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190 STORE32H(right, pt+4); |
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191 |
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192 return CRYPT_OK; |
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193 } |
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194 |
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195 int kasumi_setup(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey) |
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196 { |
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197 static const u16 C[8] = { 0x0123,0x4567,0x89AB,0xCDEF, 0xFEDC,0xBA98,0x7654,0x3210 }; |
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198 u16 ukey[8], Kprime[8]; |
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199 int n; |
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200 |
0cbe8f6dbf9e
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Matt Johnston <matt@ucc.asn.au>
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201 LTC_ARGCHK(key != NULL); |
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Matt Johnston <matt@ucc.asn.au>
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202 LTC_ARGCHK(skey != NULL); |
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203 |
0cbe8f6dbf9e
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204 if (keylen != 16) { |
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Matt Johnston <matt@ucc.asn.au>
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205 return CRYPT_INVALID_KEYSIZE; |
0cbe8f6dbf9e
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Matt Johnston <matt@ucc.asn.au>
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206 } |
0cbe8f6dbf9e
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207 |
0cbe8f6dbf9e
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Matt Johnston <matt@ucc.asn.au>
parents:
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208 if (num_rounds != 0 && num_rounds != 8) { |
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Matt Johnston <matt@ucc.asn.au>
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209 return CRYPT_INVALID_ROUNDS; |
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210 } |
0cbe8f6dbf9e
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211 |
0cbe8f6dbf9e
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
212 /* Start by ensuring the subkeys are endian correct on a 16-bit basis */ |
0cbe8f6dbf9e
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Matt Johnston <matt@ucc.asn.au>
parents:
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213 for (n = 0; n < 8; n++ ) { |
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Matt Johnston <matt@ucc.asn.au>
parents:
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|
214 ukey[n] = (((u16)key[2*n]) << 8) | key[2*n+1]; |
0cbe8f6dbf9e
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parents:
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215 } |
0cbe8f6dbf9e
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216 |
0cbe8f6dbf9e
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Matt Johnston <matt@ucc.asn.au>
parents:
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|
217 /* Now build the K'[] keys */ |
0cbe8f6dbf9e
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Matt Johnston <matt@ucc.asn.au>
parents:
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|
218 for (n = 0; n < 8; n++) { |
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Matt Johnston <matt@ucc.asn.au>
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219 Kprime[n] = ukey[n] ^ C[n]; |
0cbe8f6dbf9e
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Matt Johnston <matt@ucc.asn.au>
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220 } |
0cbe8f6dbf9e
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Matt Johnston <matt@ucc.asn.au>
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221 |
0cbe8f6dbf9e
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Matt Johnston <matt@ucc.asn.au>
parents:
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changeset
|
222 /* Finally construct the various sub keys */ |
0cbe8f6dbf9e
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Matt Johnston <matt@ucc.asn.au>
parents:
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|
223 for(n = 0; n < 8; n++) { |
0cbe8f6dbf9e
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Matt Johnston <matt@ucc.asn.au>
parents:
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changeset
|
224 skey->kasumi.KLi1[n] = ROL16(ukey[n],1); |
0cbe8f6dbf9e
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
Matt Johnston <matt@ucc.asn.au>
parents:
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|
225 skey->kasumi.KLi2[n] = Kprime[(n+2)&0x7]; |
0cbe8f6dbf9e
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Matt Johnston <matt@ucc.asn.au>
parents:
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|
226 skey->kasumi.KOi1[n] = ROL16(ukey[(n+1)&0x7],5); |
0cbe8f6dbf9e
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
Matt Johnston <matt@ucc.asn.au>
parents:
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|
227 skey->kasumi.KOi2[n] = ROL16(ukey[(n+5)&0x7],8); |
0cbe8f6dbf9e
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
Matt Johnston <matt@ucc.asn.au>
parents:
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|
228 skey->kasumi.KOi3[n] = ROL16(ukey[(n+6)&0x7],13); |
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229 skey->kasumi.KIi1[n] = Kprime[(n+4)&0x7]; |
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230 skey->kasumi.KIi2[n] = Kprime[(n+3)&0x7]; |
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231 skey->kasumi.KIi3[n] = Kprime[(n+7)&0x7]; |
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232 } |
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233 |
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234 return CRYPT_OK; |
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235 } |
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236 |
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237 void kasumi_done(symmetric_key *skey) |
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238 { |
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239 } |
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240 |
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241 int kasumi_keysize(int *keysize) |
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242 { |
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243 LTC_ARGCHK(keysize != NULL); |
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244 if (*keysize >= 16) { |
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245 *keysize = 16; |
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246 return CRYPT_OK; |
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247 } else { |
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248 return CRYPT_INVALID_KEYSIZE; |
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249 } |
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250 } |
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251 |
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252 int kasumi_test(void) |
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253 { |
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254 #ifndef LTC_TEST |
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255 return CRYPT_NOP; |
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256 #else |
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257 static const struct { |
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258 unsigned char key[16], pt[8], ct[8]; |
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259 } tests[] = { |
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260 |
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261 { |
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262 { 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, |
0cbe8f6dbf9e
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263 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, |
0cbe8f6dbf9e
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264 { 0x4B, 0x58, 0xA7, 0x71, 0xAF, 0xC7, 0xE5, 0xE8 } |
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265 }, |
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266 |
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267 { |
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268 { 0x00, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, |
0cbe8f6dbf9e
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269 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, |
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270 { 0x7E, 0xEF, 0x11, 0x3C, 0x95, 0xBB, 0x5A, 0x77 } |
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271 }, |
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272 |
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273 { |
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274 { 0x00, 0x00, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, |
0cbe8f6dbf9e
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
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275 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, |
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276 { 0x5F, 0x14, 0x06, 0x86, 0xD7, 0xAD, 0x5A, 0x39 }, |
0cbe8f6dbf9e
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277 }, |
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278 |
0cbe8f6dbf9e
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279 { |
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280 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }, |
0cbe8f6dbf9e
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281 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, |
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282 { 0x2E, 0x14, 0x91, 0xCF, 0x70, 0xAA, 0x46, 0x5D } |
0cbe8f6dbf9e
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283 }, |
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284 |
0cbe8f6dbf9e
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285 { |
0cbe8f6dbf9e
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286 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00 }, |
0cbe8f6dbf9e
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
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287 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, |
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288 { 0xB5, 0x45, 0x86, 0xF4, 0xAB, 0x9A, 0xE5, 0x46 } |
0cbe8f6dbf9e
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289 }, |
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290 |
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291 }; |
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292 unsigned char buf[2][8]; |
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293 symmetric_key key; |
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294 int err, x; |
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295 |
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296 for (x = 0; x < (int)(sizeof(tests)/sizeof(tests[0])); x++) { |
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297 if ((err = kasumi_setup(tests[x].key, 16, 0, &key)) != CRYPT_OK) { |
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298 return err; |
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299 } |
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300 if ((err = kasumi_ecb_encrypt(tests[x].pt, buf[0], &key)) != CRYPT_OK) { |
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301 return err; |
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302 } |
0cbe8f6dbf9e
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303 if ((err = kasumi_ecb_decrypt(tests[x].ct, buf[1], &key)) != CRYPT_OK) { |
0cbe8f6dbf9e
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Matt Johnston <matt@ucc.asn.au>
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304 return err; |
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305 } |
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306 if (XMEMCMP(tests[x].pt, buf[1], 8) || XMEMCMP(tests[x].ct, buf[0], 8)) { |
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307 return CRYPT_FAIL_TESTVECTOR; |
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308 } |
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309 } |
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310 return CRYPT_OK; |
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311 #endif |
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312 } |
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313 |
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314 #endif |
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315 |
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316 /* $Source: /cvs/libtom/libtomcrypt/src/ciphers/kasumi.c,v $ */ |
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317 /* $Revision: 1.7 $ */ |
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318 /* $Date: 2006/11/09 03:05:44 $ */ |