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native_simulator: ensure nsi_host_random() returns 64 bits of randomness #83428

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native_simulator: ensure nsi_host_random() returns 64 bits of randomness #83428

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9 changes: 8 additions & 1 deletion scripts/native_simulator/common/src/nsi_host_trampolines.c
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Original file line number Diff line number Diff line change
Expand Up @@ -48,7 +48,14 @@ int nsi_host_open(const char *pathname, int flags)

long nsi_host_random(void)
{
return random();
long ret = 0;
size_t bits = 8 * sizeof(ret);

/* Each call to random() returns 31 bits of randomness. */
for (size_t shift = 0; shift < bits; shift += 31) {
ret |= random() << shift;
}
return ret;
}

long nsi_host_read(int fd, void *buffer, unsigned long size)
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