Mercurial > dropbear
view libtomcrypt/src/prngs/sprng.c @ 536:1037aabf701b
- Turn DROPBEAR_SMALL_CODE off by default
author | Matt Johnston <matt@ucc.asn.au> |
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date | Tue, 03 Mar 2009 13:42:54 +0000 (2009-03-03) |
parents | 0cbe8f6dbf9e |
children | f849a5ca2efc |
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/* LibTomCrypt, modular cryptographic library -- Tom St Denis * * LibTomCrypt is a library that provides various cryptographic * algorithms in a highly modular and flexible manner. * * The library is free for all purposes without any express * guarantee it works. * * Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.com */ #include "tomcrypt.h" /** @file sprng.c Secure PRNG, Tom St Denis */ /* A secure PRNG using the RNG functions. Basically this is a * wrapper that allows you to use a secure RNG as a PRNG * in the various other functions. */ #ifdef SPRNG const struct ltc_prng_descriptor sprng_desc = { "sprng", 0, &sprng_start, &sprng_add_entropy, &sprng_ready, &sprng_read, &sprng_done, &sprng_export, &sprng_import, &sprng_test }; /** Start the PRNG @param prng [out] The PRNG state to initialize @return CRYPT_OK if successful */ int sprng_start(prng_state *prng) { return CRYPT_OK; } /** Add entropy to the PRNG state @param in The data to add @param inlen Length of the data to add @param prng PRNG state to update @return CRYPT_OK if successful */ int sprng_add_entropy(const unsigned char *in, unsigned long inlen, prng_state *prng) { return CRYPT_OK; } /** Make the PRNG ready to read from @param prng The PRNG to make active @return CRYPT_OK if successful */ int sprng_ready(prng_state *prng) { return CRYPT_OK; } /** Read from the PRNG @param out Destination @param outlen Length of output @param prng The active PRNG to read from @return Number of octets read */ unsigned long sprng_read(unsigned char *out, unsigned long outlen, prng_state *prng) { LTC_ARGCHK(out != NULL); return rng_get_bytes(out, outlen, NULL); } /** Terminate the PRNG @param prng The PRNG to terminate @return CRYPT_OK if successful */ int sprng_done(prng_state *prng) { return CRYPT_OK; } /** Export the PRNG state @param out [out] Destination @param outlen [in/out] Max size and resulting size of the state @param prng The PRNG to export @return CRYPT_OK if successful */ int sprng_export(unsigned char *out, unsigned long *outlen, prng_state *prng) { LTC_ARGCHK(outlen != NULL); *outlen = 0; return CRYPT_OK; } /** Import a PRNG state @param in The PRNG state @param inlen Size of the state @param prng The PRNG to import @return CRYPT_OK if successful */ int sprng_import(const unsigned char *in, unsigned long inlen, prng_state *prng) { return CRYPT_OK; } /** PRNG self-test @return CRYPT_OK if successful, CRYPT_NOP if self-testing has been disabled */ int sprng_test(void) { return CRYPT_OK; } #endif /* $Source: /cvs/libtom/libtomcrypt/src/prngs/sprng.c,v $ */ /* $Revision: 1.4 $ */ /* $Date: 2006/03/31 14:15:35 $ */