- (djm) [configure.ac defines.h] Skip arc4random_stir() calls on platforms

   that lack it but have arc4random_uniform()

3 files changed, 15 insertions, 3 deletions

diff --git a/ChangeLog b/ChangeLog
index 2864e1623..be1c19090 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -3,6 +3,8 @@
    that got lost in recent merge.
  - (djm) [Makefile.in monitor.c] Missed chunks of curve25519 KEX diff
  - (djm) [regress/modpipe.c regress/rekey.sh] Never intended to commit these
+ - (djm) [configure.ac defines.h] Skip arc4random_stir() calls on platforms
+   that lack it but have arc4random_uniform()
 
 20131104
  - (djm) OpenBSD CVS Sync
diff --git a/configure.ac b/configure.ac
index 0611b71b9..e545730d7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,4 +1,4 @@
-# $Id: configure.ac,v 1.537 2013/11/03 07:43:55 dtucker Exp $
+# $Id: configure.ac,v 1.538 2013/11/07 02:28:16 djm Exp $
 #
 # Copyright (c) 1999-2004 Damien Miller
 #
@@ -15,7 +15,7 @@
 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
 AC_INIT([OpenSSH], [Portable], [openssh-unix-dev@mindrot.org])
-AC_REVISION($Revision: 1.537 $)
+AC_REVISION($Revision: 1.538 $)
 AC_CONFIG_SRCDIR([ssh.c])
 AC_LANG([C])
 
@@ -1528,6 +1528,7 @@ dnl    Checks for library functions. Please keep in alphabetical order
 AC_CHECK_FUNCS([ \
         arc4random \
         arc4random_buf \
+        arc4random_stir \
         arc4random_uniform \
         asprintf \
         b64_ntop \
diff --git a/defines.h b/defines.h
index f4b262c82..b014f349b 100644
--- a/defines.h
+++ b/defines.h
@@ -25,7 +25,7 @@
 #ifndef _DEFINES_H
 #define _DEFINES_H
 
-/* $Id: defines.h,v 1.173 2013/11/03 07:43:55 dtucker Exp $ */
+/* $Id: defines.h,v 1.174 2013/11/07 02:28:16 djm Exp $ */
 
 
 /* Constants */
@@ -810,4 +810,13 @@ struct winsize {
 # endif
 #endif
 
+/*
+ * Platforms that have arc4random_uniform() and not arc4random_stir()
+ * shouldn't need the latter.
+ */
+#if defined(HAVE_ARC4RANDOM) && defined(HAVE_ARC4RANDOM_UNIFORM) && \
+    !defined(HAVE_ARC4RANDOM_STIR)
+# define arc4random_stir()
+#endif
+
 #endif /* _DEFINES_H */