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Allow OS-neutral builds for platforms where some versions have arc4random_buf

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This commit is contained in:
Mitchell Livingston 2011-08-08 17:06:46 -04:00 committed by Nick Mathewson
parent 4a343943bd
commit b4423029b9
1 changed files with 12 additions and 4 deletions
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16
evutil_rand.c
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@ -55,10 +55,12 @@ evutil_secure_rng_global_setup_locks_(const int enable_locks)
return 0; return 0;
} }
#ifndef _EVENT_HAVE_ARC4RANDOM_BUF
static void static void
arc4random_buf(void *buf, size_t n) ev_arc4random_buf(void *buf, size_t n)
{ {
#ifdef _EVENT_HAVE_ARC4RANDOM_BUF
return arc4random_buf(buf, n);
#else
unsigned char *b = buf; unsigned char *b = buf;
/* Make sure that we start out with b at a 4-byte alignment; plenty /* Make sure that we start out with b at a 4-byte alignment; plenty
* of CPUs care about this for 32-bit access. */ * of CPUs care about this for 32-bit access. */
@ -78,8 +80,8 @@ arc4random_buf(void *buf, size_t n)
ev_uint32_t u = arc4random(); ev_uint32_t u = arc4random();
memcpy(b, &u, n); memcpy(b, &u, n);
} }
}
#endif #endif
}
#else /* !_EVENT_HAVE_ARC4RANDOM { */ #else /* !_EVENT_HAVE_ARC4RANDOM { */
@ -122,12 +124,18 @@ evutil_secure_rng_init(void)
return val; return val;
} }
static void
ev_arc4random_buf(void *buf, size_t n)
{
arc4random_buf(buf, n);
}
#endif /* } !_EVENT_HAVE_ARC4RANDOM */ #endif /* } !_EVENT_HAVE_ARC4RANDOM */
void void
evutil_secure_rng_get_bytes(void *buf, size_t n) evutil_secure_rng_get_bytes(void *buf, size_t n)
{ {
arc4random_buf(buf, n); ev_arc4random_buf(buf, n);
} }
void void