/* 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/. */ #include <fcntl.h> #include <unistd.h> #include "secerr.h" #include "secrng.h" #include "prprf.h" void RNG_SystemInfoForRNG(void) { PRUint8 bytes[SYSTEM_RNG_SEED_COUNT]; size_t numBytes = RNG_SystemRNG(bytes, SYSTEM_RNG_SEED_COUNT); if (!numBytes) { /* error is set */ return; } RNG_RandomUpdate(bytes, numBytes); } size_t RNG_SystemRNG(void *dest, size_t maxLen) { int fd; int bytes; size_t fileBytes = 0; unsigned char *buffer = dest; fd = open("/dev/urandom", O_RDONLY); if (fd < 0) { PORT_SetError(SEC_ERROR_NEED_RANDOM); return 0; } while (fileBytes < maxLen) { bytes = read(fd, buffer, maxLen - fileBytes); if (bytes <= 0) { break; } fileBytes += bytes; buffer += bytes; } (void)close(fd); if (fileBytes != maxLen) { PORT_SetError(SEC_ERROR_NEED_RANDOM); return 0; } return fileBytes; }