Mercurial > dropbear
annotate libtomcrypt/src/headers/tomcrypt_prng.h @ 1150:261535598456
Added signature for changeset ef4b26364b0c
author | Matt Johnston <matt@ucc.asn.au> |
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date | Sat, 08 Aug 2015 22:14:30 +0800 |
parents | 0cbe8f6dbf9e |
children | f849a5ca2efc |
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1 /* ---- PRNG Stuff ---- */ |
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2 #ifdef YARROW |
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3 struct yarrow_prng { |
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4 int cipher, hash; |
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5 unsigned char pool[MAXBLOCKSIZE]; |
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6 symmetric_CTR ctr; |
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7 LTC_MUTEX_TYPE(prng_lock) |
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8 }; |
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9 #endif |
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10 |
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11 #ifdef RC4 |
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12 struct rc4_prng { |
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13 int x, y; |
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14 unsigned char buf[256]; |
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15 }; |
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16 #endif |
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17 |
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18 #ifdef FORTUNA |
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19 struct fortuna_prng { |
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20 hash_state pool[FORTUNA_POOLS]; /* the pools */ |
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21 |
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22 symmetric_key skey; |
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23 |
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24 unsigned char K[32], /* the current key */ |
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25 IV[16]; /* IV for CTR mode */ |
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26 |
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27 unsigned long pool_idx, /* current pool we will add to */ |
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28 pool0_len, /* length of 0'th pool */ |
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29 wd; |
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30 |
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31 ulong64 reset_cnt; /* number of times we have reset */ |
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32 LTC_MUTEX_TYPE(prng_lock) |
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33 }; |
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34 #endif |
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35 |
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36 #ifdef SOBER128 |
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37 struct sober128_prng { |
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38 ulong32 R[17], /* Working storage for the shift register */ |
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39 initR[17], /* saved register contents */ |
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40 konst, /* key dependent constant */ |
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41 sbuf; /* partial word encryption buffer */ |
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42 |
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43 int nbuf, /* number of part-word stream bits buffered */ |
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44 flag, /* first add_entropy call or not? */ |
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45 set; /* did we call add_entropy to set key? */ |
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46 |
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47 }; |
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48 #endif |
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49 |
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50 typedef union Prng_state { |
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51 char dummy[1]; |
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52 #ifdef YARROW |
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53 struct yarrow_prng yarrow; |
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54 #endif |
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55 #ifdef RC4 |
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56 struct rc4_prng rc4; |
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57 #endif |
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58 #ifdef FORTUNA |
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59 struct fortuna_prng fortuna; |
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60 #endif |
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61 #ifdef SOBER128 |
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62 struct sober128_prng sober128; |
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63 #endif |
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64 } prng_state; |
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65 |
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66 /** PRNG descriptor */ |
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67 extern struct ltc_prng_descriptor { |
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68 /** Name of the PRNG */ |
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69 char *name; |
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70 /** size in bytes of exported state */ |
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71 int export_size; |
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72 /** Start a PRNG state |
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73 @param prng [out] The state to initialize |
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74 @return CRYPT_OK if successful |
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75 */ |
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76 int (*start)(prng_state *prng); |
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77 /** Add entropy to the PRNG |
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78 @param in The entropy |
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79 @param inlen Length of the entropy (octets)\ |
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80 @param prng The PRNG state |
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81 @return CRYPT_OK if successful |
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82 */ |
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83 int (*add_entropy)(const unsigned char *in, unsigned long inlen, prng_state *prng); |
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84 /** Ready a PRNG state to read from |
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85 @param prng The PRNG state to ready |
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86 @return CRYPT_OK if successful |
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87 */ |
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88 int (*ready)(prng_state *prng); |
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89 /** Read from the PRNG |
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90 @param out [out] Where to store the data |
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91 @param outlen Length of data desired (octets) |
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92 @param prng The PRNG state to read from |
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93 @return Number of octets read |
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94 */ |
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95 unsigned long (*read)(unsigned char *out, unsigned long outlen, prng_state *prng); |
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96 /** Terminate a PRNG state |
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97 @param prng The PRNG state to terminate |
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98 @return CRYPT_OK if successful |
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99 */ |
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100 int (*done)(prng_state *prng); |
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101 /** Export a PRNG state |
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102 @param out [out] The destination for the state |
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103 @param outlen [in/out] The max size and resulting size of the PRNG state |
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104 @param prng The PRNG to export |
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105 @return CRYPT_OK if successful |
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106 */ |
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107 int (*pexport)(unsigned char *out, unsigned long *outlen, prng_state *prng); |
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108 /** Import a PRNG state |
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109 @param in The data to import |
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110 @param inlen The length of the data to import (octets) |
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111 @param prng The PRNG to initialize/import |
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112 @return CRYPT_OK if successful |
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113 */ |
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114 int (*pimport)(const unsigned char *in, unsigned long inlen, prng_state *prng); |
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115 /** Self-test the PRNG |
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116 @return CRYPT_OK if successful, CRYPT_NOP if self-testing has been disabled |
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117 */ |
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118 int (*test)(void); |
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119 } prng_descriptor[]; |
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120 |
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121 #ifdef YARROW |
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122 int yarrow_start(prng_state *prng); |
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123 int yarrow_add_entropy(const unsigned char *in, unsigned long inlen, prng_state *prng); |
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124 int yarrow_ready(prng_state *prng); |
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125 unsigned long yarrow_read(unsigned char *out, unsigned long outlen, prng_state *prng); |
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126 int yarrow_done(prng_state *prng); |
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127 int yarrow_export(unsigned char *out, unsigned long *outlen, prng_state *prng); |
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128 int yarrow_import(const unsigned char *in, unsigned long inlen, prng_state *prng); |
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129 int yarrow_test(void); |
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130 extern const struct ltc_prng_descriptor yarrow_desc; |
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131 #endif |
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132 |
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133 #ifdef FORTUNA |
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134 int fortuna_start(prng_state *prng); |
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135 int fortuna_add_entropy(const unsigned char *in, unsigned long inlen, prng_state *prng); |
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136 int fortuna_ready(prng_state *prng); |
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137 unsigned long fortuna_read(unsigned char *out, unsigned long outlen, prng_state *prng); |
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138 int fortuna_done(prng_state *prng); |
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139 int fortuna_export(unsigned char *out, unsigned long *outlen, prng_state *prng); |
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140 int fortuna_import(const unsigned char *in, unsigned long inlen, prng_state *prng); |
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141 int fortuna_test(void); |
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142 extern const struct ltc_prng_descriptor fortuna_desc; |
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143 #endif |
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144 |
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145 #ifdef RC4 |
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146 int rc4_start(prng_state *prng); |
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147 int rc4_add_entropy(const unsigned char *in, unsigned long inlen, prng_state *prng); |
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148 int rc4_ready(prng_state *prng); |
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149 unsigned long rc4_read(unsigned char *out, unsigned long outlen, prng_state *prng); |
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150 int rc4_done(prng_state *prng); |
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151 int rc4_export(unsigned char *out, unsigned long *outlen, prng_state *prng); |
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152 int rc4_import(const unsigned char *in, unsigned long inlen, prng_state *prng); |
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153 int rc4_test(void); |
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154 extern const struct ltc_prng_descriptor rc4_desc; |
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155 #endif |
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156 |
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157 #ifdef SPRNG |
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158 int sprng_start(prng_state *prng); |
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159 int sprng_add_entropy(const unsigned char *in, unsigned long inlen, prng_state *prng); |
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160 int sprng_ready(prng_state *prng); |
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161 unsigned long sprng_read(unsigned char *out, unsigned long outlen, prng_state *prng); |
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162 int sprng_done(prng_state *prng); |
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163 int sprng_export(unsigned char *out, unsigned long *outlen, prng_state *prng); |
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164 int sprng_import(const unsigned char *in, unsigned long inlen, prng_state *prng); |
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165 int sprng_test(void); |
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166 extern const struct ltc_prng_descriptor sprng_desc; |
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167 #endif |
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168 |
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169 #ifdef SOBER128 |
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170 int sober128_start(prng_state *prng); |
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171 int sober128_add_entropy(const unsigned char *in, unsigned long inlen, prng_state *prng); |
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172 int sober128_ready(prng_state *prng); |
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173 unsigned long sober128_read(unsigned char *out, unsigned long outlen, prng_state *prng); |
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174 int sober128_done(prng_state *prng); |
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175 int sober128_export(unsigned char *out, unsigned long *outlen, prng_state *prng); |
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176 int sober128_import(const unsigned char *in, unsigned long inlen, prng_state *prng); |
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177 int sober128_test(void); |
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178 extern const struct ltc_prng_descriptor sober128_desc; |
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179 #endif |
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180 |
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181 int find_prng(const char *name); |
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182 int register_prng(const struct ltc_prng_descriptor *prng); |
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183 int unregister_prng(const struct ltc_prng_descriptor *prng); |
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184 int prng_is_valid(int idx); |
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185 LTC_MUTEX_PROTO(ltc_prng_mutex) |
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186 |
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187 /* Slow RNG you **might** be able to use to seed a PRNG with. Be careful as this |
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188 * might not work on all platforms as planned |
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189 */ |
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190 unsigned long rng_get_bytes(unsigned char *out, |
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191 unsigned long outlen, |
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192 void (*callback)(void)); |
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193 |
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194 int rng_make_prng(int bits, int wprng, prng_state *prng, void (*callback)(void)); |
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195 |
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196 |
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197 /* $Source: /cvs/libtom/libtomcrypt/src/headers/tomcrypt_prng.h,v $ */ |
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198 /* $Revision: 1.8 $ */ |
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199 /* $Date: 2006/11/05 01:36:43 $ */ |