gecko/security/nss/lib/freebl/sysrand.c
Brian Smith 4453811aee Bug 795972: Upgrade NSS to NSS_3_14_BETA1, r=me
--HG--
rename : security/nss/lib/freebl/sechash.h => security/nss/lib/cryptohi/sechash.h
rename : security/nss/lib/softoken/secmodt.h => security/nss/lib/pk11wrap/secmodt.h
rename : security/nss/lib/freebl/hasht.h => security/nss/lib/util/hasht.h
extra : rebase_source : 7da6cd73ca2605a261085ad7fb3b90315e38ad6b
2012-10-01 11:02:15 -07:00

47 lines
998 B
C

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifdef FREEBL_NO_DEPEND
#include "stubs.h"
#endif
#include "seccomon.h"
static size_t rng_systemFromNoise(unsigned char *dest, size_t maxLen);
#if defined(XP_UNIX) || defined(XP_BEOS)
#include "unix_rand.c"
#endif
#ifdef XP_WIN
#include "win_rand.c"
#endif
#ifdef XP_OS2
#include "os2_rand.c"
#endif
/*
* Normal RNG_SystemRNG() isn't available, use the system noise to collect
* the required amount of entropy.
*/
static size_t
rng_systemFromNoise(unsigned char *dest, size_t maxLen)
{
size_t retBytes = maxLen;
while (maxLen) {
size_t nbytes = RNG_GetNoise(dest, maxLen);
PORT_Assert(nbytes != 0);
dest += nbytes;
maxLen -= nbytes;
/* some hw op to try to introduce more entropy into the next
* RNG_GetNoise call */
rng_systemJitter();
}
return retBytes;
}