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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 |
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12 /* A secure PRNG using the RNG functions. Basically this is a |
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13 * wrapper that allows you to use a secure RNG as a PRNG |
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14 * in the various other functions. |
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15 */ |
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16 #include "mycrypt.h" |
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17 |
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18 #ifdef SPRNG |
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19 |
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20 const struct _prng_descriptor sprng_desc = |
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21 { |
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143
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22 "sprng", 0, |
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23 &sprng_start, |
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24 &sprng_add_entropy, |
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25 &sprng_ready, |
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143
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26 &sprng_read, |
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27 &sprng_done, |
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28 &sprng_export, |
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29 &sprng_import, |
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30 &sprng_test |
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31 }; |
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32 |
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33 int sprng_start(prng_state *prng) |
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34 { |
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35 return CRYPT_OK; |
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36 } |
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37 |
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38 int sprng_add_entropy(const unsigned char *buf, unsigned long len, prng_state *prng) |
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39 { |
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40 return CRYPT_OK; |
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41 } |
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42 |
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43 int sprng_ready(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 unsigned long sprng_read(unsigned char *buf, unsigned long len, prng_state *prng) |
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49 { |
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50 _ARGCHK(buf != NULL); |
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51 return rng_get_bytes(buf, len, NULL); |
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52 } |
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53 |
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54 int sprng_done(prng_state *prng) |
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55 { |
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56 return CRYPT_OK; |
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57 } |
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58 |
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59 int sprng_export(unsigned char *out, unsigned long *outlen, prng_state *prng) |
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60 { |
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61 _ARGCHK(outlen != NULL); |
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62 |
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63 *outlen = 0; |
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64 return CRYPT_OK; |
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65 } |
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66 |
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67 int sprng_import(const unsigned char *in, unsigned long inlen, prng_state *prng) |
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68 { |
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69 return CRYPT_OK; |
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70 } |
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71 |
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72 int sprng_test(void) |
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73 { |
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74 return CRYPT_OK; |
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75 } |
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76 |
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77 #endif |
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78 |
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79 |
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80 |
