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Added RNG support for non-Linux/BSD systems #9

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Added RNG support for non-Linux/BSD systems #9

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27 changes: 17 additions & 10 deletions lib/Transforms/Obfuscation/PrngAESCtr.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -764,18 +764,25 @@ void PrngAESCtr::prng_seed () {
}

devrandom.close();
DEBUG_WITH_TYPE ("cprng", dbgs() << "CPNRG seeded with /dev/random");

memset(ctr, 0, 16);

// Once the seed is there, we compute the
// AES128 key-schedule
aes_compute_ks(ks, key);

seeded = true;
DEBUG_WITH_TYPE ("cprng", dbgs() << "CPRNG seeded with /dev/random");

} else {
ctx.emitError (Twine ("Cannot open /dev/random"));
srand((unsigned int)__rdtsc());
uint8_t tempKey[16];

for (int i = 0; i < 16; i++)
tempKey[i] = rand() % 255;
memcpy(key, tempKey, 16);
DEBUG_WITH_TYPE("cprng", dbgs() << "CPRNG seeded with rand()");
}

memset(ctr, 0, 16);

// Once the seed is there, we compute the
// AES128 key-schedule
aes_compute_ks(ks, key);

seeded = true;
}

void PrngAESCtr::inc_ctr() {
Expand Down