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[Change] Instead of seeding the MT with a bit of random, we use full urandom.

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This commit is contained in:
Allanis 2013-04-23 22:01:18 +01:00
parent ceb96b0f13
commit 1391fabc65
1 changed files with 9 additions and 5 deletions
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12
src/rng.c
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@ -24,13 +24,16 @@ static uint32_t mt_getInt(void);
void rng_init(void) { void rng_init(void) {
uint32_t i; uint32_t i;
int need_init;
need_init = 1; // Initialize by default.
#ifdef LINUX #ifdef LINUX
int fd; char buf[4]; int fd;
fd = open("/dev/random", O_RDONLY); fd = open("/dev/urandom", O_RDONLY); // /dev/urandom is better then time seed.
if(fd != -1) { if(fd != -1) {
if(read(fd, buf, 4) < 4) i = sizeof(uint32_t)*624;
memcpy(&i, buf, 4); if(read(fd, &MT, i) == 1)
need_init = 0;
else else
i = rng_timeEntropy(); i = rng_timeEntropy();
close(fd); close(fd);
@ -39,6 +42,7 @@ void rng_init(void) {
#else #else
i = rng_timeEntropy(); i = rng_timeEntropy();
#endif #endif
if(need_init)
mt_initArray(i); mt_initArray(i);
for(i = 0; i < 10; i++) for(i = 0; i < 10; i++)
// Generate numbers to get away from poor initial values. // Generate numbers to get away from poor initial values.