Change _rs_allocate so it can combine the two regions (rs and rsx)

into one if a system has an awesome getentropy().  In that case it
is valid to totally throw away the rsx state in the child.  If the
getentropy() is not very good and has a lazy reseed operation, this
combining is a bad idea, and the reseed should probably continue to
use the "something old, something new" mix.  _rs_allocate() can
accomodate either method, but not on the fly.
ok matthew

4 files changed, 55 insertions, 55 deletions

diff --git a/lib/libcrypto/arc4random/arc4random_linux.h b/lib/libcrypto/arc4random/arc4random_linux.h
index f02ae388d5f..a713d15e06d 100644
--- a/lib/libcrypto/arc4random/arc4random_linux.h
+++ b/lib/libcrypto/arc4random/arc4random_linux.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: arc4random_linux.h,v 1.2 2014/07/18 21:40:54 matthew Exp $	*/
+/*	$OpenBSD: arc4random_linux.h,v 1.3 2014/07/19 00:08:43 deraadt Exp $	*/
 
 /*
  * Copyright (c) 1996, David Mazieres <dm@uun.org>
@@ -22,15 +22,21 @@
  * Stub functions for portability.
  */
 
-static inline void *
-_rs_allocate(size_t len)
+static inline int
+_rs_allocate(struct _rs **rsp, struct _rsx **rsxp)
 {
-	void *p;
-
-	if ((p = mmap(NULL, len, PROT_READ|PROT_WRITE,
+	if ((*rsp = mmap(NULL, sizeof(**rsp), PROT_READ|PROT_WRITE,
 	    MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED)
-		return (NULL);
-	return (p);
+		return (-1);
+
+	if ((*rsxp = mmap(NULL, sizeof(**rsxp) PROT_READ|PROT_WRITE,
+	    MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED) {
+		munmap(*rsxp, sizeof(**rsxp);
+		return (-1);
+	}
+
+	_ARC4_ATFORK(_rs_forkhandler);
+	return (0);
 }
 
 static volatile sig_atomic_t _rs_forked;
@@ -54,10 +60,3 @@ _rs_forkdetect(void)
 			memset(rs, 0, sizeof(*rs));
 	}
 }
-
-static inline void
-_rs_forkdetectsetup(struct _rs *rs, size_t len)
-{
-	_ARC4_ATFORK(_rs_forkhandler);
-}
-
diff --git a/lib/libcrypto/arc4random/arc4random_osx.h b/lib/libcrypto/arc4random/arc4random_osx.h
index 46053a45b9f..ea4bd70fcd0 100644
--- a/lib/libcrypto/arc4random/arc4random_osx.h
+++ b/lib/libcrypto/arc4random/arc4random_osx.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: arc4random_osx.h,v 1.2 2014/07/18 21:40:54 matthew Exp $	*/
+/*	$OpenBSD: arc4random_osx.h,v 1.3 2014/07/19 00:08:43 deraadt Exp $	*/
 
 /*
  * Copyright (c) 1996, David Mazieres <dm@uun.org>
@@ -22,15 +22,21 @@
  * Stub functions for portability.
  */
 
-static inline void *
-_rs_allocate(size_t len)
+static inline int
+_rs_allocate(struct _rs **rsp, struct _rsx **rsxp)
 {
-	void *p;
-
-	if ((p = mmap(NULL, len, PROT_READ|PROT_WRITE,
+	if ((*rsp = mmap(NULL, sizeof(**rsp), PROT_READ|PROT_WRITE,
 	    MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED)
-		return (NULL);
-	return (p);
+		return (-1);
+
+	if ((*rsxp = mmap(NULL, sizeof(**rsxp) PROT_READ|PROT_WRITE,
+	    MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED) {
+		munmap(*rsxp, sizeof(**rsxp);
+		return (-1);
+	}
+
+	_ARC4_ATFORK(_rs_forkhandler);
+	return (0);
 }
 
 static volatile sig_atomic_t _rs_forked;
@@ -54,10 +60,3 @@ _rs_forkdetect(void)
 			memset(rs, 0, sizeof(*rs));
 	}
 }
-
-static inline void
-_rs_forkdetectsetup(struct _rs *rs, size_t len)
-{
-	_ARC4_ATFORK(_rs_forkhandler);
-}
-
diff --git a/lib/libcrypto/arc4random/arc4random_solaris.h b/lib/libcrypto/arc4random/arc4random_solaris.h
index 2386dbe8851..ec9353f1b77 100644
--- a/lib/libcrypto/arc4random/arc4random_solaris.h
+++ b/lib/libcrypto/arc4random/arc4random_solaris.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: arc4random_solaris.h,v 1.2 2014/07/18 21:40:54 matthew Exp $	*/
+/*	$OpenBSD: arc4random_solaris.h,v 1.3 2014/07/19 00:08:43 deraadt Exp $	*/
 
 /*
  * Copyright (c) 1996, David Mazieres <dm@uun.org>
@@ -22,15 +22,21 @@
  * Stub functions for portability.
  */
 
-static inline void *
-_rs_allocate(size_t len)
+static inline int
+_rs_allocate(struct _rs **rsp, struct _rsx **rsxp)
 {
-	void *p;
-
-	if ((p = mmap(NULL, len, PROT_READ|PROT_WRITE,
+	if ((*rsp = mmap(NULL, sizeof(**rsp), PROT_READ|PROT_WRITE,
 	    MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED)
-		return (NULL);
-	return (p);
+		return (-1);
+
+	if ((*rsxp = mmap(NULL, sizeof(**rsxp) PROT_READ|PROT_WRITE,
+	    MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED) {
+		munmap(*rsxp, sizeof(**rsxp);
+		return (-1);
+	}
+
+	_ARC4_ATFORK(_rs_forkhandler);
+	return (0);
 }
 
 static volatile sig_atomic_t _rs_forked;
@@ -54,10 +60,3 @@ _rs_forkdetect(void)
 			memset(rs, 0, sizeof(*rs));
 	}
 }
-
-static inline void
-_rs_forkdetectsetup(struct _rs *rs, size_t len)
-{
-	_ARC4_ATFORK(_rs_forkhandler);
-}
-
diff --git a/lib/libcrypto/arc4random/arc4random_win.h b/lib/libcrypto/arc4random/arc4random_win.h
index 7d01d42be50..1fc228d1091 100644
--- a/lib/libcrypto/arc4random/arc4random_win.h
+++ b/lib/libcrypto/arc4random/arc4random_win.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: arc4random_win.h,v 1.1 2014/07/18 02:05:55 deraadt Exp $	*/
+/*	$OpenBSD: arc4random_win.h,v 1.2 2014/07/19 00:08:43 deraadt Exp $	*/
 
 /*
  * Copyright (c) 1996, David Mazieres <dm@uun.org>
@@ -22,10 +22,19 @@
  * Stub functions for portability.
  */
 
-static inline void *
-_rs_allocate(size_t len)
+static inline int
+_rs_allocate(struct _rs **rsp, struct _rsx **rsxp)
 {
-	return calloc(1, sizeof(*rs));
+	*rsp = calloc(1, sizeof(**rsp));
+	if (*rsp == NULL)
+		return (-1);
+
+	*rsxp = calloc(1, sizeof(**rsxp));
+	if (*rsxp == NULL) {
+		free(*rsp);
+		return (-1);
+	}
+	return (0);
 }
 
 static inline void
@@ -37,9 +46,3 @@ static inline void
 _rs_forkdetect(void)
 {
 }
-
-static inline void
-_rs_forkdetectsetup(struct _rs *rs, size_t len)
-{
-}
-