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_sodium_alignedcalloc(): use arc4random_buf() if available

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Frank Denis 2013-10-21 21:07:39 -07:00
parent 323f24ef60
commit 696934b123
1 changed files with 5 additions and 0 deletions
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5
src/libsodium/sodium/utils.c
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@ -54,9 +54,14 @@ _sodium_alignedcalloc(unsigned char ** const unaligned_p, const size_t len)
return NULL;
}
*unaligned_p = unaligned;
#ifdef HAVE_ARC4RANDOM
(void) i;
arc4random_buf(unaligned, len + (size_t) 256U);
#else
for (i = (size_t) 0U; i < len + (size_t) 256U; ++i) {
unaligned[i] = (unsigned char) rand();
}
#endif
aligned = unaligned + 64;
aligned += (ptrdiff_t) 63 & (-(ptrdiff_t) aligned);
memset(aligned, 0, len);