Mercurial > dropbear

annotate libtomcrypt/src/prngs/sprng.c @ 307:24b19535264b ucc-axis-hack

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progress for serial logins
author matt-ucc@ucc.asn.au
date Sat, 25 Mar 2006 17:31:52 +0000
parents 1b9e69c058d2
children 0cbe8f6dbf9e
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285
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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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