The Tor Browser: security/nss/lib/freebl/sysrand.c@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* This Source Code Form is subject to the terms of the Mozilla Public

     2  * License, v. 2.0. If a copy of the MPL was not distributed with this

     3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     5 #ifdef FREEBL_NO_DEPEND

     6 #include "stubs.h"

     7 #endif

     9 #include "seccomon.h"

    11 #ifndef XP_WIN

    12 static size_t rng_systemFromNoise(unsigned char *dest, size_t maxLen);

    13 #endif

    15 #if defined(XP_UNIX) || defined(XP_BEOS)

    16 #include "unix_rand.c"

    17 #endif

    18 #ifdef XP_WIN

    19 #include "win_rand.c"

    20 #endif

    21 #ifdef XP_OS2

    22 #include "os2_rand.c"

    23 #endif

    25 #ifndef XP_WIN

    26 /*

    27  * Normal RNG_SystemRNG() isn't available, use the system noise to collect

    28  * the required amount of entropy.

    29  */

    30 static size_t

    31 rng_systemFromNoise(unsigned char *dest, size_t maxLen)

    32 {

    33    size_t retBytes = maxLen;

    35    while (maxLen) {

    36 	size_t nbytes = RNG_GetNoise(dest, maxLen);

    38 	PORT_Assert(nbytes != 0);

    40 	dest += nbytes;

    41 	maxLen -= nbytes;

    43 	/* some hw op to try to introduce more entropy into the next

    44 	 * RNG_GetNoise call */

    45 	rng_systemJitter();

    46    }

    47    return retBytes;

    48 }

    49 #endif

The Tor Browser / file revision