1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/security/nss/lib/freebl/sysrand.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,49 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.6 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +#ifdef FREEBL_NO_DEPEND
1.9 +#include "stubs.h"
1.10 +#endif
1.11 +
1.12 +#include "seccomon.h"
1.13 +
1.14 +#ifndef XP_WIN
1.15 +static size_t rng_systemFromNoise(unsigned char *dest, size_t maxLen);
1.16 +#endif
1.17 +
1.18 +#if defined(XP_UNIX) || defined(XP_BEOS)
1.19 +#include "unix_rand.c"
1.20 +#endif
1.21 +#ifdef XP_WIN
1.22 +#include "win_rand.c"
1.23 +#endif
1.24 +#ifdef XP_OS2
1.25 +#include "os2_rand.c"
1.26 +#endif
1.27 +
1.28 +#ifndef XP_WIN
1.29 +/*
1.30 + * Normal RNG_SystemRNG() isn't available, use the system noise to collect
1.31 + * the required amount of entropy.
1.32 + */
1.33 +static size_t
1.34 +rng_systemFromNoise(unsigned char *dest, size_t maxLen)
1.35 +{
1.36 + size_t retBytes = maxLen;
1.37 +
1.38 + while (maxLen) {
1.39 + size_t nbytes = RNG_GetNoise(dest, maxLen);
1.40 +
1.41 + PORT_Assert(nbytes != 0);
1.42 +
1.43 + dest += nbytes;
1.44 + maxLen -= nbytes;
1.45 +
1.46 + /* some hw op to try to introduce more entropy into the next
1.47 + * RNG_GetNoise call */
1.48 + rng_systemJitter();
1.49 + }
1.50 + return retBytes;
1.51 +}
1.52 +#endif
