Mercurial > dropbear

annotate src/headers/tomcrypt_prng.h @ 280:59400faa4b44 libtomcrypt-orig libtomcrypt-1.05

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Re-import libtomcrypt 1.05 for cleaner propagating. From crypt-1.05.tar.bz2, SHA1 of 88250202bb51570dc64f7e8f1c943cda9479258f
author Matt Johnston <matt@ucc.asn.au>
date Wed, 08 Mar 2006 12:58:00 +0000
parents
children d5faf4814ddb
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
280
59400faa4b44 Re-import libtomcrypt 1.05 for cleaner propagating.
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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 };
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8 #endif
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9
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10 #ifdef RC4
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11 struct rc4_prng {
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12 int x, y;
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13 unsigned char buf[256];
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14 };
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15 #endif
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16
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17 #ifdef FORTUNA
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18 struct fortuna_prng {
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19 hash_state pool[FORTUNA_POOLS]; /* the pools */
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20
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21 symmetric_key skey;
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22
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23 unsigned char K[32], /* the current key */
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24 IV[16]; /* IV for CTR mode */
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25
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26 unsigned long pool_idx, /* current pool we will add to */
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27 pool0_len, /* length of 0'th pool */
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28 wd;
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29
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30 ulong64 reset_cnt; /* number of times we have reset */
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31 };
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32 #endif
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33
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34 #ifdef SOBER128
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35 struct sober128_prng {
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36 ulong32 R[17], /* Working storage for the shift register */
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37 initR[17], /* saved register contents */
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38 konst, /* key dependent constant */
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39 sbuf; /* partial word encryption buffer */
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40
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41 int nbuf, /* number of part-word stream bits buffered */
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42 flag, /* first add_entropy call or not? */
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43 set; /* did we call add_entropy to set key? */
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44
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45 };
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46 #endif
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47
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48 typedef union Prng_state {
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49 #ifdef YARROW
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50 struct yarrow_prng yarrow;
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51 #endif
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52 #ifdef RC4
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53 struct rc4_prng rc4;
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54 #endif
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55 #ifdef FORTUNA
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56 struct fortuna_prng fortuna;
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57 #endif
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58 #ifdef SOBER128
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59 struct sober128_prng sober128;
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60 #endif
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61 } prng_state;
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62
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63 extern struct ltc_prng_descriptor {
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64 /** Name of the PRNG */
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65 char *name;
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66 /** size in bytes of exported state */
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67 int export_size;
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68 /** Start a PRNG state
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69 @param prng [out] The state to initialize
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70 @return CRYPT_OK if successful
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71 */
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72 int (*start)(prng_state *prng);
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73 /** Add entropy to the PRNG
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74 @param in The entropy
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75 @param inlen Length of the entropy (octets)\
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76 @param prng The PRNG state
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77 @return CRYPT_OK if successful
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78 */
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79 int (*add_entropy)(const unsigned char *in, unsigned long inlen, prng_state *prng);
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80 /** Ready a PRNG state to read from
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81 @param prng The PRNG state to ready
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82 @return CRYPT_OK if successful
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83 */
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84 int (*ready)(prng_state *prng);
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85 /** Read from the PRNG
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86 @param out [out] Where to store the data
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87 @param outlen Length of data desired (octets)
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88 @param prng The PRNG state to read from
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89 @return Number of octets read
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90 */
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91 unsigned long (*read)(unsigned char *out, unsigned long outlen, prng_state *prng);
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92 /** Terminate a PRNG state
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93 @param prng The PRNG state to terminate
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94 @return CRYPT_OK if successful
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95 */
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96 int (*done)(prng_state *prng);
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97 /** Export a PRNG state
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98 @param out [out] The destination for the state
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99 @param outlen [in/out] The max size and resulting size of the PRNG state
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100 @param prng The PRNG to export
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101 @return CRYPT_OK if successful
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102 */
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103 int (*pexport)(unsigned char *out, unsigned long *outlen, prng_state *prng);
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104 /** Import a PRNG state
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105 @param in The data to import
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106 @param inlen The length of the data to import (octets)
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107 @param prng The PRNG to initialize/import
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108 @return CRYPT_OK if successful
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109 */
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110 int (*pimport)(const unsigned char *in, unsigned long inlen, prng_state *prng);
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111 /** Self-test the PRNG
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112 @return CRYPT_OK if successful, CRYPT_NOP if self-testing has been disabled
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113 */
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114 int (*test)(void);
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115 } prng_descriptor[];
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116
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117 #ifdef YARROW
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118 int yarrow_start(prng_state *prng);
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119 int yarrow_add_entropy(const unsigned char *in, unsigned long inlen, prng_state *prng);
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120 int yarrow_ready(prng_state *prng);
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121 unsigned long yarrow_read(unsigned char *out, unsigned long outlen, prng_state *prng);
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122 int yarrow_done(prng_state *prng);
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123 int yarrow_export(unsigned char *out, unsigned long *outlen, prng_state *prng);
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124 int yarrow_import(const unsigned char *in, unsigned long inlen, prng_state *prng);
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125 int yarrow_test(void);
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126 extern const struct ltc_prng_descriptor yarrow_desc;
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127 #endif
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128
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129 #ifdef FORTUNA
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130 int fortuna_start(prng_state *prng);
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131 int fortuna_add_entropy(const unsigned char *in, unsigned long inlen, prng_state *prng);
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132 int fortuna_ready(prng_state *prng);
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133 unsigned long fortuna_read(unsigned char *out, unsigned long outlen, prng_state *prng);
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134 int fortuna_done(prng_state *prng);
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135 int fortuna_export(unsigned char *out, unsigned long *outlen, prng_state *prng);
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136 int fortuna_import(const unsigned char *in, unsigned long inlen, prng_state *prng);
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137 int fortuna_test(void);
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138 extern const struct ltc_prng_descriptor fortuna_desc;
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139 #endif
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140
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141 #ifdef RC4
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142 int rc4_start(prng_state *prng);
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143 int rc4_add_entropy(const unsigned char *in, unsigned long inlen, prng_state *prng);
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144 int rc4_ready(prng_state *prng);
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145 unsigned long rc4_read(unsigned char *out, unsigned long outlen, prng_state *prng);
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146 int rc4_done(prng_state *prng);
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147 int rc4_export(unsigned char *out, unsigned long *outlen, prng_state *prng);
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148 int rc4_import(const unsigned char *in, unsigned long inlen, prng_state *prng);
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149 int rc4_test(void);
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150 extern const struct ltc_prng_descriptor rc4_desc;
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151 #endif
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152
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153 #ifdef SPRNG
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154 int sprng_start(prng_state *prng);
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155 int sprng_add_entropy(const unsigned char *in, unsigned long inlen, prng_state *prng);
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156 int sprng_ready(prng_state *prng);
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157 unsigned long sprng_read(unsigned char *out, unsigned long outlen, prng_state *prng);
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158 int sprng_done(prng_state *prng);
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159 int sprng_export(unsigned char *out, unsigned long *outlen, prng_state *prng);
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160 int sprng_import(const unsigned char *in, unsigned long inlen, prng_state *prng);
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161 int sprng_test(void);
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162 extern const struct ltc_prng_descriptor sprng_desc;
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163 #endif
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164
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165 #ifdef SOBER128
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166 int sober128_start(prng_state *prng);
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167 int sober128_add_entropy(const unsigned char *in, unsigned long inlen, prng_state *prng);
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168 int sober128_ready(prng_state *prng);
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169 unsigned long sober128_read(unsigned char *out, unsigned long outlen, prng_state *prng);
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170 int sober128_done(prng_state *prng);
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171 int sober128_export(unsigned char *out, unsigned long *outlen, prng_state *prng);
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172 int sober128_import(const unsigned char *in, unsigned long inlen, prng_state *prng);
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173 int sober128_test(void);
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174 extern const struct ltc_prng_descriptor sober128_desc;
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175 #endif
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176
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177 int find_prng(const char *name);
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178 int register_prng(const struct ltc_prng_descriptor *prng);
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179 int unregister_prng(const struct ltc_prng_descriptor *prng);
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180 int prng_is_valid(int idx);
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181 LTC_MUTEX_PROTO(ltc_prng_mutex);
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182
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183 /* Slow RNG you **might** be able to use to seed a PRNG with. Be careful as this
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184 * might not work on all platforms as planned
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185 */
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186 unsigned long rng_get_bytes(unsigned char *out,
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187 unsigned long outlen,
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188 void (*callback)(void));
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189
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190 int rng_make_prng(int bits, int wprng, prng_state *prng, void (*callback)(void));
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191
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192
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193 /* $Source: /cvs/libtom/libtomcrypt/src/headers/tomcrypt_prng.h,v $ */
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194 /* $Revision: 1.3 $ */
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195 /* $Date: 2005/06/19 18:00:28 $ */