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