Mercurial > dropbear
annotate src/prngs/sprng.c @ 191:1c15b283127b libtomcrypt-orig
Import of libtomcrypt 1.02 with manual path rename rearrangement etc
author | Matt Johnston <matt@ucc.asn.au> |
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date | Fri, 06 May 2005 13:23:02 +0000 |
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children | 39d5d58461d6 |
rev | line source |
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191
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1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis |
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2 * |
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3 * LibTomCrypt is a library that provides various cryptographic |
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4 * algorithms in a highly modular and flexible manner. |
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5 * |
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6 * The library is free for all purposes without any express |
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7 * guarantee it works. |
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8 * |
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9 * Tom St Denis, [email protected], http://libtomcrypt.org |
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10 */ |
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11 #include "tomcrypt.h" |
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12 |
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13 /** |
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14 @file sprng.c |
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15 Secure PRNG, Tom St Denis |
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16 */ |
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17 |
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18 /* A secure PRNG using the RNG functions. Basically this is a |
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19 * wrapper that allows you to use a secure RNG as a PRNG |
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20 * in the various other functions. |
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21 */ |
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22 |
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23 #ifdef SPRNG |
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24 |
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25 const struct ltc_prng_descriptor sprng_desc = |
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26 { |
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27 "sprng", 0, |
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28 &sprng_start, |
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29 &sprng_add_entropy, |
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30 &sprng_ready, |
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31 &sprng_read, |
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32 &sprng_done, |
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33 &sprng_export, |
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34 &sprng_import, |
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35 &sprng_test |
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36 }; |
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37 |
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38 /** |
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39 Start the PRNG |
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40 @param prng [out] The PRNG state to initialize |
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41 @return CRYPT_OK if successful |
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42 */ |
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43 int sprng_start(prng_state *prng) |
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44 { |
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45 return CRYPT_OK; |
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46 } |
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47 |
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48 /** |
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49 Add entropy to the PRNG state |
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50 @param in The data to add |
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51 @param inlen Length of the data to add |
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52 @param prng PRNG state to update |
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53 @return CRYPT_OK if successful |
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54 */ |
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55 int sprng_add_entropy(const unsigned char *in, unsigned long inlen, prng_state *prng) |
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56 { |
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57 return CRYPT_OK; |
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58 } |
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59 |
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60 /** |
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61 Make the PRNG ready to read from |
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62 @param prng The PRNG to make active |
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63 @return CRYPT_OK if successful |
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64 */ |
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65 int sprng_ready(prng_state *prng) |
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66 { |
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67 return CRYPT_OK; |
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68 } |
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69 |
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70 /** |
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71 Read from the PRNG |
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72 @param out Destination |
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73 @param outlen Length of output |
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74 @param prng The active PRNG to read from |
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75 @return Number of octets read |
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76 */ |
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77 unsigned long sprng_read(unsigned char *out, unsigned long outlen, prng_state *prng) |
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78 { |
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79 LTC_ARGCHK(out != NULL); |
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80 return rng_get_bytes(out, outlen, NULL); |
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81 } |
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82 |
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83 /** |
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84 Terminate the PRNG |
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85 @param prng The PRNG to terminate |
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86 @return CRYPT_OK if successful |
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87 */ |
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88 int sprng_done(prng_state *prng) |
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89 { |
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90 return CRYPT_OK; |
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91 } |
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92 |
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93 /** |
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94 Export the PRNG state |
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95 @param out [out] Destination |
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96 @param outlen [in/out] Max size and resulting size of the state |
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97 @param prng The PRNG to export |
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98 @return CRYPT_OK if successful |
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99 */ |
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100 int sprng_export(unsigned char *out, unsigned long *outlen, prng_state *prng) |
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101 { |
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102 LTC_ARGCHK(outlen != NULL); |
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103 |
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104 *outlen = 0; |
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105 return CRYPT_OK; |
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106 } |
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107 |
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108 /** |
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109 Import a PRNG state |
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110 @param in The PRNG state |
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111 @param inlen Size of the state |
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112 @param prng The PRNG to import |
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113 @return CRYPT_OK if successful |
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114 */ |
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115 int sprng_import(const unsigned char *in, unsigned long inlen, prng_state *prng) |
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116 { |
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117 return CRYPT_OK; |
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118 } |
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119 |
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120 /** |
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121 PRNG self-test |
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122 @return CRYPT_OK if successful, CRYPT_NOP if self-testing has been disabled |
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123 */ |
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124 int sprng_test(void) |
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125 { |
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126 return CRYPT_OK; |
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Import of libtomcrypt 1.02 with manual path rename rearrangement etc
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parents:
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127 } |
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parents:
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128 |
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129 #endif |
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130 |
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parents:
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131 |
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Import of libtomcrypt 1.02 with manual path rename rearrangement etc
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parents:
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132 |