Seperate arc4random's os-dependent parts into static inline functions,

making it much easier for libressl -portable to fill in the gaps.
ok bcook beck

1 files changed, 46 insertions, 0 deletions

diff --git a/src/lib/libc/crypt/arc4random.h b/src/lib/libc/crypt/arc4random.h
new file mode 100644
index 0000000000..e0309a3184
--- /dev/null
+++ b/src/lib/libc/crypt/arc4random.h
@@ -0,0 +1,46 @@
+/*      $OpenBSD: arc4random.h,v 1.1 2014/07/18 02:05:55 deraadt Exp $  */
+
+/*
+ * Copyright (c) 1996, David Mazieres <dm@uun.org>
+ * Copyright (c) 2008, Damien Miller <djm@openbsd.org>
+ * Copyright (c) 2013, Markus Friedl <markus@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * Stub functions for portability.
+ */
+
+static inline void *
+_rs_allocate(size_t len)
+{
+        void *p;
+
+        if ((p = mmap(NULL, sizeof(*rs), PROT_READ|PROT_WRITE,
+            MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED)
+                return (NULL);
+        return (p);
+}
+
+static inline void
+_rs_forkdetect(void)
+{
+}
+
+static inline void
+_rs_forkdetectsetup(struct _rs *rs, size_t len)
+{
+        if (minherit(rs, len, MAP_INHERIT_ZERO) == -1)
+                abort();
+}