| /* 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@iahu.ca, http://libtomcrypt.org |
| */ |
| |
| /* 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. |
| */ |
| #include "mycrypt.h" |
| |
| #ifdef SPRNG |
| |
| const struct _prng_descriptor sprng_desc = |
| { |
| "sprng", 0, |
| &sprng_start, |
| &sprng_add_entropy, |
| &sprng_ready, |
| &sprng_read, |
| &sprng_done, |
| &sprng_export, |
| &sprng_import, |
| &sprng_test |
| }; |
| |
| int sprng_start(prng_state *prng) |
| { |
| return CRYPT_OK; |
| } |
| |
| int sprng_add_entropy(const unsigned char *buf, unsigned long len, prng_state *prng) |
| { |
| return CRYPT_OK; |
| } |
| |
| int sprng_ready(prng_state *prng) |
| { |
| return CRYPT_OK; |
| } |
| |
| unsigned long sprng_read(unsigned char *buf, unsigned long len, prng_state *prng) |
| { |
| _ARGCHK(buf != NULL); |
| return rng_get_bytes(buf, len, NULL); |
| } |
| |
| int sprng_done(prng_state *prng) |
| { |
| return CRYPT_OK; |
| } |
| |
| int sprng_export(unsigned char *out, unsigned long *outlen, prng_state *prng) |
| { |
| _ARGCHK(outlen != NULL); |
| |
| *outlen = 0; |
| return CRYPT_OK; |
| } |
| |
| int sprng_import(const unsigned char *in, unsigned long inlen, prng_state *prng) |
| { |
| return CRYPT_OK; |
| } |
| |
| int sprng_test(void) |
| { |
| return CRYPT_OK; |
| } |
| |
| #endif |
| |
| |
| |