Mercurial > dropbear
annotate libtomcrypt/src/hashes/sha1.c @ 1057:16584026a1f0 nocircbuffer
allocate buffer and data in a single allocation
author | Matt Johnston <matt@ucc.asn.au> |
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date | Sun, 01 Mar 2015 21:16:09 +0800 |
parents | 0cbe8f6dbf9e |
children | f849a5ca2efc |
rev | line source |
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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 #include "tomcrypt.h" |
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12 |
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13 /** |
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14 @file sha1.c |
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15 SHA1 code by Tom St Denis |
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16 */ |
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17 |
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18 |
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19 #ifdef SHA1 |
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20 |
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21 const struct ltc_hash_descriptor sha1_desc = |
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22 { |
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23 "sha1", |
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24 2, |
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25 20, |
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26 64, |
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27 |
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28 /* OID */ |
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29 { 1, 3, 14, 3, 2, 26, }, |
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30 6, |
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31 |
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32 &sha1_init, |
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33 &sha1_process, |
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34 &sha1_done, |
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35 &sha1_test, |
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36 NULL |
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37 }; |
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38 |
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39 #define F0(x,y,z) (z ^ (x & (y ^ z))) |
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40 #define F1(x,y,z) (x ^ y ^ z) |
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41 #define F2(x,y,z) ((x & y) | (z & (x | y))) |
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42 #define F3(x,y,z) (x ^ y ^ z) |
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43 |
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44 #ifdef LTC_CLEAN_STACK |
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45 static int _sha1_compress(hash_state *md, unsigned char *buf) |
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46 #else |
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47 static int sha1_compress(hash_state *md, unsigned char *buf) |
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48 #endif |
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49 { |
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50 ulong32 a,b,c,d,e,W[80],i; |
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51 #ifdef LTC_SMALL_CODE |
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52 ulong32 t; |
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53 #endif |
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54 |
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55 /* copy the state into 512-bits into W[0..15] */ |
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56 for (i = 0; i < 16; i++) { |
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57 LOAD32H(W[i], buf + (4*i)); |
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58 } |
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59 |
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60 /* copy state */ |
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61 a = md->sha1.state[0]; |
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62 b = md->sha1.state[1]; |
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63 c = md->sha1.state[2]; |
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64 d = md->sha1.state[3]; |
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65 e = md->sha1.state[4]; |
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66 |
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67 /* expand it */ |
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68 for (i = 16; i < 80; i++) { |
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69 W[i] = ROL(W[i-3] ^ W[i-8] ^ W[i-14] ^ W[i-16], 1); |
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70 } |
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71 |
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72 /* compress */ |
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73 /* round one */ |
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74 #define FF0(a,b,c,d,e,i) e = (ROLc(a, 5) + F0(b,c,d) + e + W[i] + 0x5a827999UL); b = ROLc(b, 30); |
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75 #define FF1(a,b,c,d,e,i) e = (ROLc(a, 5) + F1(b,c,d) + e + W[i] + 0x6ed9eba1UL); b = ROLc(b, 30); |
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76 #define FF2(a,b,c,d,e,i) e = (ROLc(a, 5) + F2(b,c,d) + e + W[i] + 0x8f1bbcdcUL); b = ROLc(b, 30); |
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77 #define FF3(a,b,c,d,e,i) e = (ROLc(a, 5) + F3(b,c,d) + e + W[i] + 0xca62c1d6UL); b = ROLc(b, 30); |
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78 |
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79 #ifdef LTC_SMALL_CODE |
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80 |
1b9e69c058d2
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81 for (i = 0; i < 20; ) { |
1b9e69c058d2
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82 FF0(a,b,c,d,e,i++); t = e; e = d; d = c; c = b; b = a; a = t; |
1b9e69c058d2
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83 } |
1b9e69c058d2
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84 |
1b9e69c058d2
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85 for (; i < 40; ) { |
1b9e69c058d2
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86 FF1(a,b,c,d,e,i++); t = e; e = d; d = c; c = b; b = a; a = t; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
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87 } |
1b9e69c058d2
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88 |
1b9e69c058d2
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89 for (; i < 60; ) { |
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90 FF2(a,b,c,d,e,i++); t = e; e = d; d = c; c = b; b = a; a = t; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
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91 } |
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92 |
1b9e69c058d2
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93 for (; i < 80; ) { |
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94 FF3(a,b,c,d,e,i++); t = e; e = d; d = c; c = b; b = a; a = t; |
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95 } |
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96 |
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97 #else |
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98 |
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99 for (i = 0; i < 20; ) { |
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100 FF0(a,b,c,d,e,i++); |
1b9e69c058d2
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101 FF0(e,a,b,c,d,i++); |
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102 FF0(d,e,a,b,c,i++); |
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103 FF0(c,d,e,a,b,i++); |
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104 FF0(b,c,d,e,a,i++); |
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105 } |
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106 |
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107 /* round two */ |
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108 for (; i < 40; ) { |
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109 FF1(a,b,c,d,e,i++); |
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110 FF1(e,a,b,c,d,i++); |
1b9e69c058d2
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111 FF1(d,e,a,b,c,i++); |
1b9e69c058d2
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112 FF1(c,d,e,a,b,i++); |
1b9e69c058d2
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113 FF1(b,c,d,e,a,i++); |
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114 } |
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115 |
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116 /* round three */ |
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117 for (; i < 60; ) { |
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118 FF2(a,b,c,d,e,i++); |
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119 FF2(e,a,b,c,d,i++); |
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120 FF2(d,e,a,b,c,i++); |
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121 FF2(c,d,e,a,b,i++); |
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122 FF2(b,c,d,e,a,i++); |
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123 } |
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124 |
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125 /* round four */ |
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126 for (; i < 80; ) { |
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127 FF3(a,b,c,d,e,i++); |
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128 FF3(e,a,b,c,d,i++); |
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129 FF3(d,e,a,b,c,i++); |
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130 FF3(c,d,e,a,b,i++); |
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131 FF3(b,c,d,e,a,i++); |
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132 } |
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133 #endif |
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134 |
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135 #undef FF0 |
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136 #undef FF1 |
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137 #undef FF2 |
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138 #undef FF3 |
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139 |
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140 /* store */ |
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141 md->sha1.state[0] = md->sha1.state[0] + a; |
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142 md->sha1.state[1] = md->sha1.state[1] + b; |
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143 md->sha1.state[2] = md->sha1.state[2] + c; |
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144 md->sha1.state[3] = md->sha1.state[3] + d; |
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145 md->sha1.state[4] = md->sha1.state[4] + e; |
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146 |
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147 return CRYPT_OK; |
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148 } |
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149 |
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150 #ifdef LTC_CLEAN_STACK |
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151 static int sha1_compress(hash_state *md, unsigned char *buf) |
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152 { |
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153 int err; |
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154 err = _sha1_compress(md, buf); |
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155 burn_stack(sizeof(ulong32) * 87); |
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156 return err; |
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157 } |
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158 #endif |
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159 |
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160 /** |
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161 Initialize the hash state |
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162 @param md The hash state you wish to initialize |
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163 @return CRYPT_OK if successful |
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164 */ |
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165 int sha1_init(hash_state * md) |
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166 { |
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167 LTC_ARGCHK(md != NULL); |
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168 md->sha1.state[0] = 0x67452301UL; |
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169 md->sha1.state[1] = 0xefcdab89UL; |
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170 md->sha1.state[2] = 0x98badcfeUL; |
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171 md->sha1.state[3] = 0x10325476UL; |
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172 md->sha1.state[4] = 0xc3d2e1f0UL; |
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173 md->sha1.curlen = 0; |
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174 md->sha1.length = 0; |
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175 return CRYPT_OK; |
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176 } |
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177 |
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178 /** |
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179 Process a block of memory though the hash |
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180 @param md The hash state |
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181 @param in The data to hash |
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182 @param inlen The length of the data (octets) |
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183 @return CRYPT_OK if successful |
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184 */ |
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185 HASH_PROCESS(sha1_process, sha1_compress, sha1, 64) |
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186 |
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187 /** |
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188 Terminate the hash to get the digest |
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189 @param md The hash state |
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190 @param out [out] The destination of the hash (20 bytes) |
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191 @return CRYPT_OK if successful |
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192 */ |
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193 int sha1_done(hash_state * md, unsigned char *out) |
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194 { |
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195 int i; |
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196 |
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197 LTC_ARGCHK(md != NULL); |
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198 LTC_ARGCHK(out != NULL); |
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199 |
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200 if (md->sha1.curlen >= sizeof(md->sha1.buf)) { |
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201 return CRYPT_INVALID_ARG; |
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202 } |
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203 |
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204 /* increase the length of the message */ |
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205 md->sha1.length += md->sha1.curlen * 8; |
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206 |
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207 /* append the '1' bit */ |
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208 md->sha1.buf[md->sha1.curlen++] = (unsigned char)0x80; |
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209 |
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210 /* if the length is currently above 56 bytes we append zeros |
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211 * then compress. Then we can fall back to padding zeros and length |
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212 * encoding like normal. |
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213 */ |
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214 if (md->sha1.curlen > 56) { |
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215 while (md->sha1.curlen < 64) { |
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216 md->sha1.buf[md->sha1.curlen++] = (unsigned char)0; |
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217 } |
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218 sha1_compress(md, md->sha1.buf); |
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219 md->sha1.curlen = 0; |
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220 } |
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221 |
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222 /* pad upto 56 bytes of zeroes */ |
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223 while (md->sha1.curlen < 56) { |
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224 md->sha1.buf[md->sha1.curlen++] = (unsigned char)0; |
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225 } |
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226 |
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227 /* store length */ |
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228 STORE64H(md->sha1.length, md->sha1.buf+56); |
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229 sha1_compress(md, md->sha1.buf); |
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230 |
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231 /* copy output */ |
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232 for (i = 0; i < 5; i++) { |
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233 STORE32H(md->sha1.state[i], out+(4*i)); |
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234 } |
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235 #ifdef LTC_CLEAN_STACK |
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236 zeromem(md, sizeof(hash_state)); |
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237 #endif |
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238 return CRYPT_OK; |
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239 } |
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240 |
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241 /** |
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242 Self-test the hash |
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243 @return CRYPT_OK if successful, CRYPT_NOP if self-tests have been disabled |
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244 */ |
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245 int sha1_test(void) |
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246 { |
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247 #ifndef LTC_TEST |
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248 return CRYPT_NOP; |
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249 #else |
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250 static const struct { |
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251 char *msg; |
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252 unsigned char hash[20]; |
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253 } tests[] = { |
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254 { "abc", |
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255 { 0xa9, 0x99, 0x3e, 0x36, 0x47, 0x06, 0x81, 0x6a, |
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256 0xba, 0x3e, 0x25, 0x71, 0x78, 0x50, 0xc2, 0x6c, |
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257 0x9c, 0xd0, 0xd8, 0x9d } |
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258 }, |
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259 { "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", |
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260 { 0x84, 0x98, 0x3E, 0x44, 0x1C, 0x3B, 0xD2, 0x6E, |
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261 0xBA, 0xAE, 0x4A, 0xA1, 0xF9, 0x51, 0x29, 0xE5, |
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262 0xE5, 0x46, 0x70, 0xF1 } |
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263 } |
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264 }; |
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265 |
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266 int i; |
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267 unsigned char tmp[20]; |
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268 hash_state md; |
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269 |
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270 for (i = 0; i < (int)(sizeof(tests) / sizeof(tests[0])); i++) { |
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271 sha1_init(&md); |
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272 sha1_process(&md, (unsigned char*)tests[i].msg, (unsigned long)strlen(tests[i].msg)); |
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273 sha1_done(&md, tmp); |
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274 if (XMEMCMP(tmp, tests[i].hash, 20) != 0) { |
285
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275 return CRYPT_FAIL_TESTVECTOR; |
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276 } |
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277 } |
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278 return CRYPT_OK; |
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279 #endif |
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280 } |
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281 |
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282 #endif |
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283 |
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284 |
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285 |
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286 /* $Source: /cvs/libtom/libtomcrypt/src/hashes/sha1.c,v $ */ |
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287 /* $Revision: 1.8 $ */ |
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288 /* $Date: 2006/11/01 09:28:17 $ */ |