[src/trunk]: src/sys/secmodel/securelevel Accept ioctl(RNDADDDATA) estimates ...

[riastradh <riastradh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/7788c4bef86e
branches:  trunk
changeset: 972521:7788c4bef86e
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Thu May 28 23:17:25 2020 +0000

description:
Accept ioctl(RNDADDDATA) estimates at securelevel 1 (but not 2).

securelevel=1 is supposed to be a reasonable default for normal
computers.  This got in the way of ever getting entropy from a seed
on a machine with no HWRNG -- e.g., from another machine, or by
making the executive decision that what has been sampled is good
enough and issuing `head -c 32 < /dev/urandom > /dev/random'.

diffstat:

 sys/secmodel/securelevel/secmodel_securelevel.c |  6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diffs (27 lines):

diff -r 937875f2e9b8 -r 7788c4bef86e sys/secmodel/securelevel/secmodel_securelevel.c
--- a/sys/secmodel/securelevel/secmodel_securelevel.c   Thu May 28 20:29:21 2020 +0000
+++ b/sys/secmodel/securelevel/secmodel_securelevel.c   Thu May 28 23:17:25 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: secmodel_securelevel.c,v 1.35 2020/05/11 19:36:39 alnsn Exp $ */
+/* $NetBSD: secmodel_securelevel.c,v 1.36 2020/05/28 23:17:25 riastradh Exp $ */
 /*-
  * Copyright (c) 2006 Elad Efrat <elad%NetBSD.org@localhost>
  * All rights reserved.
@@ -35,7 +35,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: secmodel_securelevel.c,v 1.35 2020/05/11 19:36:39 alnsn Exp $");
+__KERNEL_RCSID(0, "$NetBSD: secmodel_securelevel.c,v 1.36 2020/05/28 23:17:25 riastradh Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_insecure.h"
@@ -593,7 +593,7 @@
                break;
 
        case KAUTH_DEVICE_RND_ADDDATA_ESTIMATE:
-               if (securelevel > 0)
+               if (securelevel > 1)
                        result = KAUTH_RESULT_DENY;
                break;