Mercurial > dropbear
annotate libtomcrypt/src/prngs/fortuna.c @ 1589:35af85194268
Add kexdh and kexecdh fuzzers
author | Matt Johnston <matt@ucc.asn.au> |
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date | Mon, 05 Mar 2018 11:50:31 +0800 |
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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 #include "tomcrypt.h" |
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10 |
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11 /** |
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12 @file fortuna.c |
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13 Fortuna PRNG, Tom St Denis |
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14 */ |
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15 |
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16 /* Implementation of Fortuna by Tom St Denis |
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17 |
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18 We deviate slightly here for reasons of simplicity [and to fit in the API]. First all "sources" |
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19 in the AddEntropy function are fixed to 0. Second since no reliable timer is provided |
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20 we reseed automatically when len(pool0) >= 64 or every LTC_FORTUNA_WD calls to the read function */ |
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21 |
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22 #ifdef LTC_FORTUNA |
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23 |
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24 /* requries LTC_SHA256 and AES */ |
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25 #if !(defined(LTC_RIJNDAEL) && defined(LTC_SHA256)) |
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26 #error LTC_FORTUNA requires LTC_SHA256 and LTC_RIJNDAEL (AES) |
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27 #endif |
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28 |
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29 #ifndef LTC_FORTUNA_POOLS |
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30 #warning LTC_FORTUNA_POOLS was not previously defined (old headers?) |
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31 #define LTC_FORTUNA_POOLS 32 |
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32 #endif |
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33 |
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34 #if LTC_FORTUNA_POOLS < 4 || LTC_FORTUNA_POOLS > 32 |
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35 #error LTC_FORTUNA_POOLS must be in [4..32] |
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36 #endif |
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37 |
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38 const struct ltc_prng_descriptor fortuna_desc = { |
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39 "fortuna", |
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40 (32 * LTC_FORTUNA_POOLS), /* default: 1024 */ |
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41 &fortuna_start, |
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42 &fortuna_add_entropy, |
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43 &fortuna_ready, |
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44 &fortuna_read, |
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45 &fortuna_done, |
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46 &fortuna_export, |
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47 &fortuna_import, |
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48 &fortuna_test |
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49 }; |
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50 |
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51 /* update the IV */ |
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52 static void _fortuna_update_iv(prng_state *prng) |
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53 { |
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54 int x; |
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55 unsigned char *IV; |
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56 /* update IV */ |
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57 IV = prng->fortuna.IV; |
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58 for (x = 0; x < 16; x++) { |
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59 IV[x] = (IV[x] + 1) & 255; |
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60 if (IV[x] != 0) break; |
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61 } |
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62 } |
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63 |
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64 /* reseed the PRNG */ |
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65 static int _fortuna_reseed(prng_state *prng) |
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66 { |
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67 unsigned char tmp[MAXBLOCKSIZE]; |
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68 hash_state md; |
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69 int err, x; |
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70 |
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71 ++prng->fortuna.reset_cnt; |
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72 |
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73 /* new K == LTC_SHA256(K || s) where s == LTC_SHA256(P0) || LTC_SHA256(P1) ... */ |
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74 sha256_init(&md); |
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75 if ((err = sha256_process(&md, prng->fortuna.K, 32)) != CRYPT_OK) { |
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76 sha256_done(&md, tmp); |
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77 return err; |
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78 } |
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79 |
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80 for (x = 0; x < LTC_FORTUNA_POOLS; x++) { |
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81 if (x == 0 || ((prng->fortuna.reset_cnt >> (x-1)) & 1) == 0) { |
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82 /* terminate this hash */ |
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83 if ((err = sha256_done(&prng->fortuna.pool[x], tmp)) != CRYPT_OK) { |
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84 sha256_done(&md, tmp); |
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85 return err; |
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86 } |
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87 /* add it to the string */ |
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88 if ((err = sha256_process(&md, tmp, 32)) != CRYPT_OK) { |
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89 sha256_done(&md, tmp); |
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90 return err; |
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91 } |
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92 /* reset this pool */ |
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93 if ((err = sha256_init(&prng->fortuna.pool[x])) != CRYPT_OK) { |
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94 sha256_done(&md, tmp); |
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95 return err; |
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96 } |
285
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97 } else { |
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98 break; |
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99 } |
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100 } |
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101 |
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102 /* finish key */ |
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103 if ((err = sha256_done(&md, prng->fortuna.K)) != CRYPT_OK) { |
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104 return err; |
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105 } |
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106 if ((err = rijndael_setup(prng->fortuna.K, 32, 0, &prng->fortuna.skey)) != CRYPT_OK) { |
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107 return err; |
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108 } |
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109 _fortuna_update_iv(prng); |
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110 |
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111 /* reset pool len */ |
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112 prng->fortuna.pool0_len = 0; |
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113 prng->fortuna.wd = 0; |
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114 |
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115 |
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116 #ifdef LTC_CLEAN_STACK |
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117 zeromem(&md, sizeof(md)); |
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118 zeromem(tmp, sizeof(tmp)); |
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119 #endif |
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120 |
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121 return CRYPT_OK; |
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122 } |
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123 |
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124 /** |
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125 Start the PRNG |
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126 @param prng [out] The PRNG state to initialize |
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127 @return CRYPT_OK if successful |
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128 */ |
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129 int fortuna_start(prng_state *prng) |
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130 { |
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131 int err, x, y; |
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132 unsigned char tmp[MAXBLOCKSIZE]; |
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133 |
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134 LTC_ARGCHK(prng != NULL); |
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135 prng->ready = 0; |
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136 |
285
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137 /* initialize the pools */ |
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138 for (x = 0; x < LTC_FORTUNA_POOLS; x++) { |
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139 if ((err = sha256_init(&prng->fortuna.pool[x])) != CRYPT_OK) { |
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140 for (y = 0; y < x; y++) { |
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141 sha256_done(&prng->fortuna.pool[y], tmp); |
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142 } |
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143 return err; |
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144 } |
285
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145 } |
382
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146 prng->fortuna.pool_idx = prng->fortuna.pool0_len = prng->fortuna.wd = 0; |
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147 prng->fortuna.reset_cnt = 0; |
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148 |
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149 /* reset bufs */ |
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150 zeromem(prng->fortuna.K, 32); |
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151 if ((err = rijndael_setup(prng->fortuna.K, 32, 0, &prng->fortuna.skey)) != CRYPT_OK) { |
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152 for (x = 0; x < LTC_FORTUNA_POOLS; x++) { |
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153 sha256_done(&prng->fortuna.pool[x], tmp); |
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154 } |
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155 return err; |
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156 } |
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157 zeromem(prng->fortuna.IV, 16); |
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158 |
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159 LTC_MUTEX_INIT(&prng->lock) |
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160 |
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161 return CRYPT_OK; |
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162 } |
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163 |
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164 /** |
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165 Add entropy to the PRNG state |
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166 @param in The data to add |
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167 @param inlen Length of the data to add |
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168 @param prng PRNG state to update |
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169 @return CRYPT_OK if successful |
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170 */ |
285
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171 int fortuna_add_entropy(const unsigned char *in, unsigned long inlen, prng_state *prng) |
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172 { |
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173 unsigned char tmp[2]; |
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174 int err; |
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175 |
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176 LTC_ARGCHK(prng != NULL); |
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177 LTC_ARGCHK(in != NULL); |
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178 LTC_ARGCHK(inlen > 0); |
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179 |
285
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180 /* ensure inlen <= 32 */ |
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181 if (inlen > 32) { |
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182 inlen = 32; |
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183 } |
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184 |
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185 /* add s || length(in) || in to pool[pool_idx] */ |
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186 tmp[0] = 0; |
382
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187 tmp[1] = (unsigned char)inlen; |
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188 |
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189 LTC_MUTEX_LOCK(&prng->lock); |
285
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190 if ((err = sha256_process(&prng->fortuna.pool[prng->fortuna.pool_idx], tmp, 2)) != CRYPT_OK) { |
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191 goto LBL_UNLOCK; |
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192 } |
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193 if ((err = sha256_process(&prng->fortuna.pool[prng->fortuna.pool_idx], in, inlen)) != CRYPT_OK) { |
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194 goto LBL_UNLOCK; |
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195 } |
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196 if (prng->fortuna.pool_idx == 0) { |
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197 prng->fortuna.pool0_len += inlen; |
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198 } |
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199 if (++(prng->fortuna.pool_idx) == LTC_FORTUNA_POOLS) { |
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200 prng->fortuna.pool_idx = 0; |
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201 } |
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202 err = CRYPT_OK; /* success */ |
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203 |
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204 LBL_UNLOCK: |
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205 LTC_MUTEX_UNLOCK(&prng->lock); |
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206 return err; |
285
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207 } |
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208 |
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209 /** |
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210 Make the PRNG ready to read from |
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211 @param prng The PRNG to make active |
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212 @return CRYPT_OK if successful |
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213 */ |
285
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214 int fortuna_ready(prng_state *prng) |
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215 { |
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216 int err; |
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217 LTC_ARGCHK(prng != NULL); |
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218 |
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219 LTC_MUTEX_LOCK(&prng->lock); |
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220 err = _fortuna_reseed(prng); |
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221 prng->ready = (err == CRYPT_OK) ? 1 : 0; |
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222 |
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223 LTC_MUTEX_UNLOCK(&prng->lock); |
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224 return err; |
285
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225 } |
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226 |
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227 /** |
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228 Read from the PRNG |
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229 @param out Destination |
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230 @param outlen Length of output |
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231 @param prng The active PRNG to read from |
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232 @return Number of octets read |
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233 */ |
285
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234 unsigned long fortuna_read(unsigned char *out, unsigned long outlen, prng_state *prng) |
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235 { |
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236 unsigned char tmp[16]; |
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237 unsigned long tlen = 0; |
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238 |
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239 if (outlen == 0 || prng == NULL || out == NULL) return 0; |
285
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240 |
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241 LTC_MUTEX_LOCK(&prng->lock); |
285
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242 |
1471
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243 if (!prng->ready) { |
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244 goto LBL_UNLOCK; |
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Update to libtomcrypt 1.18.1, merged with Dropbear changes
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245 } |
382
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246 |
285
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247 /* do we have to reseed? */ |
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248 if (++prng->fortuna.wd == LTC_FORTUNA_WD || prng->fortuna.pool0_len >= 64) { |
1471
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249 if (_fortuna_reseed(prng) != CRYPT_OK) { |
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250 goto LBL_UNLOCK; |
285
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251 } |
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252 } |
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253 |
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254 /* now generate the blocks required */ |
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255 tlen = outlen; |
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256 |
382
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diff
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|
257 /* handle whole blocks without the extra XMEMCPY */ |
285
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258 while (outlen >= 16) { |
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259 /* encrypt the IV and store it */ |
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260 rijndael_ecb_encrypt(prng->fortuna.IV, out, &prng->fortuna.skey); |
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261 out += 16; |
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262 outlen -= 16; |
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263 _fortuna_update_iv(prng); |
285
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264 } |
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265 |
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266 /* left over bytes? */ |
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267 if (outlen > 0) { |
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268 rijndael_ecb_encrypt(prng->fortuna.IV, tmp, &prng->fortuna.skey); |
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269 XMEMCPY(out, tmp, outlen); |
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270 _fortuna_update_iv(prng); |
285
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271 } |
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272 |
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273 /* generate new key */ |
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274 rijndael_ecb_encrypt(prng->fortuna.IV, prng->fortuna.K , &prng->fortuna.skey); |
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275 _fortuna_update_iv(prng); |
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276 |
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277 rijndael_ecb_encrypt(prng->fortuna.IV, prng->fortuna.K+16, &prng->fortuna.skey); |
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278 _fortuna_update_iv(prng); |
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279 |
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280 if (rijndael_setup(prng->fortuna.K, 32, 0, &prng->fortuna.skey) != CRYPT_OK) { |
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281 tlen = 0; |
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282 } |
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283 |
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284 LBL_UNLOCK: |
285
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285 #ifdef LTC_CLEAN_STACK |
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286 zeromem(tmp, sizeof(tmp)); |
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287 #endif |
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288 LTC_MUTEX_UNLOCK(&prng->lock); |
285
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289 return tlen; |
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290 } |
285
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291 |
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292 /** |
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293 Terminate the PRNG |
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294 @param prng The PRNG to terminate |
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295 @return CRYPT_OK if successful |
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296 */ |
285
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297 int fortuna_done(prng_state *prng) |
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298 { |
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299 int err, x; |
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300 unsigned char tmp[32]; |
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301 |
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302 LTC_ARGCHK(prng != NULL); |
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303 |
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304 LTC_MUTEX_LOCK(&prng->lock); |
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305 prng->ready = 0; |
285
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306 |
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307 /* terminate all the hashes */ |
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308 for (x = 0; x < LTC_FORTUNA_POOLS; x++) { |
285
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309 if ((err = sha256_done(&(prng->fortuna.pool[x]), tmp)) != CRYPT_OK) { |
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310 goto LBL_UNLOCK; |
285
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311 } |
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312 } |
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313 /* call cipher done when we invent one ;-) */ |
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314 err = CRYPT_OK; /* success */ |
285
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315 |
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316 LBL_UNLOCK: |
285
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317 #ifdef LTC_CLEAN_STACK |
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318 zeromem(tmp, sizeof(tmp)); |
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319 #endif |
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320 LTC_MUTEX_UNLOCK(&prng->lock); |
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321 LTC_MUTEX_DESTROY(&prng->lock); |
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322 return err; |
285
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323 } |
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324 |
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325 /** |
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326 Export the PRNG state |
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327 @param out [out] Destination |
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328 @param outlen [in/out] Max size and resulting size of the state |
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329 @param prng The PRNG to export |
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330 @return CRYPT_OK if successful |
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331 */ |
285
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332 int fortuna_export(unsigned char *out, unsigned long *outlen, prng_state *prng) |
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333 { |
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334 int x, err; |
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335 hash_state *md; |
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336 unsigned long len = fortuna_desc.export_size; |
285
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337 |
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338 LTC_ARGCHK(out != NULL); |
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339 LTC_ARGCHK(outlen != NULL); |
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340 LTC_ARGCHK(prng != NULL); |
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341 |
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342 LTC_MUTEX_LOCK(&prng->lock); |
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343 |
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344 if (!prng->ready) { |
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345 err = CRYPT_ERROR; |
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346 goto LBL_UNLOCK; |
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347 } |
382
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348 |
285
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349 /* we'll write bytes for s&g's */ |
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6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
1435
diff
changeset
|
350 if (*outlen < len) { |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
351 *outlen = len; |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
1435
diff
changeset
|
352 err = CRYPT_BUFFER_OVERFLOW; |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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parents:
1435
diff
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|
353 goto LBL_UNLOCK; |
285
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
354 } |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
355 |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
356 md = XMALLOC(sizeof(hash_state)); |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
357 if (md == NULL) { |
1471
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
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1435
diff
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|
358 err = CRYPT_MEM; |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
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1435
diff
changeset
|
359 goto LBL_UNLOCK; |
285
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
360 } |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
361 |
1471
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
362 /* to emit the state we copy each pool, terminate it then hash it again so |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
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diff
changeset
|
363 * an attacker who sees the state can't determine the current state of the PRNG |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
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diff
changeset
|
364 */ |
1435
f849a5ca2efc
update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
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382
diff
changeset
|
365 for (x = 0; x < LTC_FORTUNA_POOLS; x++) { |
285
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
366 /* copy the PRNG */ |
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
367 XMEMCPY(md, &(prng->fortuna.pool[x]), sizeof(*md)); |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
368 |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
369 /* terminate it */ |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
370 if ((err = sha256_done(md, out+x*32)) != CRYPT_OK) { |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
371 goto LBL_ERR; |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
372 } |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
373 |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
374 /* now hash it */ |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
375 if ((err = sha256_init(md)) != CRYPT_OK) { |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
376 goto LBL_ERR; |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
377 } |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
378 if ((err = sha256_process(md, out+x*32, 32)) != CRYPT_OK) { |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
379 goto LBL_ERR; |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
380 } |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
381 if ((err = sha256_done(md, out+x*32)) != CRYPT_OK) { |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
382 goto LBL_ERR; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
383 } |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
384 } |
1471
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
1435
diff
changeset
|
385 *outlen = len; |
285
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
386 err = CRYPT_OK; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
387 |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
388 LBL_ERR: |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
389 #ifdef LTC_CLEAN_STACK |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
390 zeromem(md, sizeof(*md)); |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
391 #endif |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
392 XFREE(md); |
1471
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
1435
diff
changeset
|
393 LBL_UNLOCK: |
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
1435
diff
changeset
|
394 LTC_MUTEX_UNLOCK(&prng->lock); |
285
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
395 return err; |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
396 } |
1471
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
1435
diff
changeset
|
397 |
285
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
398 /** |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
399 Import a PRNG state |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
400 @param in The PRNG state |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
401 @param inlen Size of the state |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
402 @param prng The PRNG to import |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
403 @return CRYPT_OK if successful |
1471
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
1435
diff
changeset
|
404 */ |
285
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
405 int fortuna_import(const unsigned char *in, unsigned long inlen, prng_state *prng) |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
406 { |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
407 int err, x; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
408 |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
409 LTC_ARGCHK(in != NULL); |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
410 LTC_ARGCHK(prng != NULL); |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
411 |
1471
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
1435
diff
changeset
|
412 if (inlen < (unsigned long)fortuna_desc.export_size) { |
285
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
413 return CRYPT_INVALID_ARG; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
414 } |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
415 |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
416 if ((err = fortuna_start(prng)) != CRYPT_OK) { |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
417 return err; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
418 } |
1435
f849a5ca2efc
update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents:
382
diff
changeset
|
419 for (x = 0; x < LTC_FORTUNA_POOLS; x++) { |
285
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
420 if ((err = fortuna_add_entropy(in+x*32, 32, prng)) != CRYPT_OK) { |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
421 return err; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
422 } |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
423 } |
1471
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
1435
diff
changeset
|
424 return CRYPT_OK; |
285
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
425 } |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
426 |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
427 /** |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
428 PRNG self-test |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
429 @return CRYPT_OK if successful, CRYPT_NOP if self-testing has been disabled |
1471
6dba84798cd5
Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
1435
diff
changeset
|
430 */ |
285
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
431 int fortuna_test(void) |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
432 { |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
433 #ifndef LTC_TEST |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
434 return CRYPT_NOP; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
435 #else |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
436 int err; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
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437 |
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438 if ((err = sha256_test()) != CRYPT_OK) { |
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439 return err; |
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440 } |
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441 return rijndael_test(); |
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442 #endif |
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443 } |
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444 |
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445 #endif |
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446 |
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447 |
1471
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448 /* ref: $Format:%D$ */ |
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449 /* git commit: $Format:%H$ */ |
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450 /* commit time: $Format:%ai$ */ |