_sodium_alignedcalloc(): use arc4random_buf() if available

2013-10-21 21:07:39 -07:00 · 2013-10-21 21:07:39 -07:00 · 696934b123
commit 696934b123
parent 323f24ef60
1 changed files with 5 additions and 0 deletions
--- a/src/libsodium/sodium/utils.c
+++ b/src/libsodium/sodium/utils.c
@ -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);