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comparison libtomcrypt/src/prngs/rng_make_prng.c @ 1471:6dba84798cd5

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Update to libtomcrypt 1.18.1, merged with Dropbear changes
author Matt Johnston <matt@ucc.asn.au>
date Fri, 09 Feb 2018 21:44:05 +0800
parents f849a5ca2efc
children
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1470:8bba51a55704 1471:6dba84798cd5
3 * LibTomCrypt is a library that provides various cryptographic 3 * LibTomCrypt is a library that provides various cryptographic
4 * algorithms in a highly modular and flexible manner. 4 * algorithms in a highly modular and flexible manner.
5 * 5 *
6 * The library is free for all purposes without any express 6 * The library is free for all purposes without any express
7 * guarantee it works. 7 * guarantee it works.
8 *
9 * Tom St Denis, [email protected], http://libtom.org
10 */ 8 */
11 #include "tomcrypt.h" 9 #include "tomcrypt.h"
12 10
13 /** 11 #ifdef LTC_RNG_MAKE_PRNG
12 /**
14 @file rng_make_prng.c 13 @file rng_make_prng.c
15 portable way to get secure random bits to feed a PRNG (Tom St Denis) 14 portable way to get secure random bits to feed a PRNG (Tom St Denis)
16 */ 15 */
17 16
18 /** 17 /**
20 @param bits Number of bits of entropy desired (64 ... 1024) 19 @param bits Number of bits of entropy desired (64 ... 1024)
21 @param wprng Index of which PRNG to setup 20 @param wprng Index of which PRNG to setup
22 @param prng [out] PRNG state to initialize 21 @param prng [out] PRNG state to initialize
23 @param callback A pointer to a void function for when the RNG is slow, this can be NULL 22 @param callback A pointer to a void function for when the RNG is slow, this can be NULL
24 @return CRYPT_OK if successful 23 @return CRYPT_OK if successful
25 */ 24 */
26 int rng_make_prng(int bits, int wprng, prng_state *prng, 25 int rng_make_prng(int bits, int wprng, prng_state *prng,
27 void (*callback)(void)) 26 void (*callback)(void))
28 { 27 {
29 unsigned char buf[256]; 28 unsigned char buf[256];
30 int err; 29 int err;
31 30
32 LTC_ARGCHK(prng != NULL); 31 LTC_ARGCHK(prng != NULL);
33 32
34 /* check parameter */ 33 /* check parameter */
35 if ((err = prng_is_valid(wprng)) != CRYPT_OK) { 34 if ((err = prng_is_valid(wprng)) != CRYPT_OK) {
36 return err; 35 return err;
60 #ifdef LTC_CLEAN_STACK 59 #ifdef LTC_CLEAN_STACK
61 zeromem(buf, sizeof(buf)); 60 zeromem(buf, sizeof(buf));
62 #endif 61 #endif
63 return CRYPT_OK; 62 return CRYPT_OK;
64 } 63 }
64 #endif /* #ifdef LTC_RNG_MAKE_PRNG */
65 65
66 66
67 /* $Source$ */ 67 /* ref: $Format:%D$ */
68 /* $Revision$ */ 68 /* git commit: $Format:%H$ */
69 /* $Date$ */ 69 /* commit time: $Format:%ai$ */