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3
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1 /* ---- PRNG Stuff ---- */ |
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2 struct yarrow_prng { |
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3 int cipher, hash; |
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4 unsigned char pool[MAXBLOCKSIZE]; |
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5 symmetric_CTR ctr; |
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6 }; |
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7 |
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8 struct rc4_prng { |
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9 int x, y; |
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10 unsigned char buf[256]; |
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11 }; |
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12 |
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143
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13 struct fortuna_prng { |
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14 hash_state pool[FORTUNA_POOLS]; /* the pools */ |
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15 |
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16 symmetric_key skey; |
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17 |
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18 unsigned char K[32], /* the current key */ |
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19 IV[16]; /* IV for CTR mode */ |
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20 |
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21 unsigned long pool_idx, /* current pool we will add to */ |
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22 pool0_len, /* length of 0'th pool */ |
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23 wd; |
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24 |
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25 ulong64 reset_cnt; /* number of times we have reset */ |
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26 }; |
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27 |
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28 struct sober128_prng { |
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29 ulong32 R[17], /* Working storage for the shift register */ |
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30 initR[17], /* saved register contents */ |
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31 konst, /* key dependent constant */ |
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32 sbuf; /* partial word encryption buffer */ |
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33 |
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34 int nbuf, /* number of part-word stream bits buffered */ |
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35 flag, /* first add_entropy call or not? */ |
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36 set; /* did we call add_entropy to set key? */ |
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37 |
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38 }; |
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39 |
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40 typedef union Prng_state { |
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143
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41 #ifdef YARROW |
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42 struct yarrow_prng yarrow; |
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143
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43 #endif |
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44 #ifdef RC4 |
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45 struct rc4_prng rc4; |
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143
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46 #endif |
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47 #ifdef FORTUNA |
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48 struct fortuna_prng fortuna; |
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49 #endif |
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50 #ifdef SOBER128 |
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51 struct sober128_prng sober128; |
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52 #endif |
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53 } prng_state; |
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54 |
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55 extern struct _prng_descriptor { |
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56 char *name; |
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143
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57 int export_size; /* size in bytes of exported state */ |
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58 int (*start)(prng_state *); |
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59 int (*add_entropy)(const unsigned char *, unsigned long, prng_state *); |
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60 int (*ready)(prng_state *); |
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143
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61 unsigned long (*read)(unsigned char *, unsigned long, prng_state *); |
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62 int (*done)(prng_state *); |
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63 int (*pexport)(unsigned char *, unsigned long *, prng_state *); |
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64 int (*pimport)(const unsigned char *, unsigned long, prng_state *); |
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65 int (*test)(void); |
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66 } prng_descriptor[]; |
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67 |
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68 #ifdef YARROW |
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143
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69 int yarrow_start(prng_state *prng); |
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70 int yarrow_add_entropy(const unsigned char *buf, unsigned long len, prng_state *prng); |
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71 int yarrow_ready(prng_state *prng); |
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72 unsigned long yarrow_read(unsigned char *buf, unsigned long len, prng_state *prng); |
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73 int yarrow_done(prng_state *prng); |
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74 int yarrow_export(unsigned char *out, unsigned long *outlen, prng_state *prng); |
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75 int yarrow_import(const unsigned char *in, unsigned long inlen, prng_state *prng); |
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76 int yarrow_test(void); |
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77 extern const struct _prng_descriptor yarrow_desc; |
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78 #endif |
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79 |
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80 #ifdef FORTUNA |
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81 int fortuna_start(prng_state *prng); |
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82 int fortuna_add_entropy(const unsigned char *buf, unsigned long len, prng_state *prng); |
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83 int fortuna_ready(prng_state *prng); |
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84 unsigned long fortuna_read(unsigned char *buf, unsigned long len, prng_state *prng); |
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85 int fortuna_done(prng_state *prng); |
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86 int fortuna_export(unsigned char *out, unsigned long *outlen, prng_state *prng); |
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87 int fortuna_import(const unsigned char *in, unsigned long inlen, prng_state *prng); |
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88 int fortuna_test(void); |
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89 extern const struct _prng_descriptor fortuna_desc; |
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90 #endif |
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91 |
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92 #ifdef RC4 |
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143
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93 int rc4_start(prng_state *prng); |
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94 int rc4_add_entropy(const unsigned char *buf, unsigned long len, prng_state *prng); |
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95 int rc4_ready(prng_state *prng); |
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96 unsigned long rc4_read(unsigned char *buf, unsigned long len, prng_state *prng); |
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97 int rc4_done(prng_state *prng); |
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98 int rc4_export(unsigned char *out, unsigned long *outlen, prng_state *prng); |
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99 int rc4_import(const unsigned char *in, unsigned long inlen, prng_state *prng); |
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100 int rc4_test(void); |
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101 extern const struct _prng_descriptor rc4_desc; |
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102 #endif |
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103 |
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104 #ifdef SPRNG |
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143
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105 int sprng_start(prng_state *prng); |
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106 int sprng_add_entropy(const unsigned char *buf, unsigned long len, prng_state *prng); |
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107 int sprng_ready(prng_state *prng); |
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108 unsigned long sprng_read(unsigned char *buf, unsigned long len, prng_state *prng); |
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109 int sprng_done(prng_state *prng); |
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110 int sprng_export(unsigned char *out, unsigned long *outlen, prng_state *prng); |
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111 int sprng_import(const unsigned char *in, unsigned long inlen, prng_state *prng); |
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112 int sprng_test(void); |
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113 extern const struct _prng_descriptor sprng_desc; |
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114 #endif |
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115 |
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143
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116 #ifdef SOBER128 |
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117 int sober128_start(prng_state *prng); |
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118 int sober128_add_entropy(const unsigned char *buf, unsigned long len, prng_state *prng); |
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119 int sober128_ready(prng_state *prng); |
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120 unsigned long sober128_read(unsigned char *buf, unsigned long len, prng_state *prng); |
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121 int sober128_done(prng_state *prng); |
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122 int sober128_export(unsigned char *out, unsigned long *outlen, prng_state *prng); |
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123 int sober128_import(const unsigned char *in, unsigned long inlen, prng_state *prng); |
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124 int sober128_test(void); |
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125 extern const struct _prng_descriptor sober128_desc; |
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126 #endif |
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127 |
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143
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128 int find_prng(const char *name); |
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129 int register_prng(const struct _prng_descriptor *prng); |
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130 int unregister_prng(const struct _prng_descriptor *prng); |
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131 int prng_is_valid(int idx); |
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132 |
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133 /* Slow RNG you **might** be able to use to seed a PRNG with. Be careful as this |
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134 * might not work on all platforms as planned |
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135 */ |
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143
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136 unsigned long rng_get_bytes(unsigned char *buf, |
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137 unsigned long len, |
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138 void (*callback)(void)); |
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139 |
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143
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140 int rng_make_prng(int bits, int wprng, prng_state *prng, void (*callback)(void)); |
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141 |
