Emit warning with dnssec enabled on FIPS system (#1549507)

Signed-off-by: Petr Menšík <pemensik@redhat.com>

dnsmasq-2.78-fips.patch

@@ -0,0 +1,47 @@
+From c7d5a6a968fa2bd7412c913adf274aaa7174303a Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Petr=20Men=C5=A1=C3=ADk?= <pemensik@redhat.com>
+Date: Fri, 2 Mar 2018 13:17:04 +0100
+Subject: [PATCH] Print warning on FIPS machine with dnssec enabled. Dnsmasq
+ has no proper FIPS 140-2 compliant implementation.
+
+---
+ src/dnsmasq.c | 9 +++++++++
+ 1 file changed, 9 insertions(+)
+
+diff --git a/src/dnsmasq.c b/src/dnsmasq.c
+index 771bec1..1cb69b7 100644
+--- a/src/dnsmasq.c
++++ b/src/dnsmasq.c
+@@ -182,6 +182,7 @@ int main (int argc, char **argv)
+       
+       if (daemon->cachesize < CACHESIZ)
+ 	die(_("cannot reduce cache size from default when DNSSEC enabled"), NULL, EC_BADCONF);
++           
+ #else 
+       die(_("DNSSEC not available: set HAVE_DNSSEC in src/config.h"), NULL, EC_BADCONF);
+ #endif
+@@ -741,6 +742,7 @@ int main (int argc, char **argv)
+   if (option_bool(OPT_DNSSEC_VALID))
+     {
+       int rc;
++      int fips;
+ 
+       /* Delay creating the timestamp file until here, after we've changed user, so that
+ 	 it has the correct owner to allow updating the mtime later. 
+@@ -752,6 +754,13 @@ int main (int argc, char **argv)
+ 	}
+       
+       my_syslog(LOG_INFO, _("DNSSEC validation enabled"));
++
++      fips = open("/etc/system-fips", O_RDONLY);
++      if (fips != -1)
++        {
++          close(fips);
++    	  my_syslog(LOG_WARNING, _("DNSSEC support is not FIPS 140-2 compliant")); 
++        }
+       
+       daemon->dnssec_no_time_check = option_bool(OPT_DNSSEC_TIME);
+       if (option_bool(OPT_DNSSEC_TIME) && !daemon->back_to_the_future)
+-- 
+2.14.3
+

dnsmasq.spec

@@ -13,7 +13,7 @@
 
 Name:           dnsmasq
 Version:        2.78
-Release:        6%{?extraversion:.%{extraversion}}%{?dist}
+Release:        7%{?extraversion:.%{extraversion}}%{?dist}
 Summary:        A lightweight DHCP/caching DNS server
 
 License:        GPLv2 or GPLv3
@@ -25,6 +25,7 @@ Source2:        dnsmasq-systemd-sysusers.conf
 # https://bugzilla.redhat.com/show_bug.cgi?id=1495409
 Patch1:         dnsmasq-2.77-underflow.patch
 Patch2:         dnsmasq-2.78-CVE-2017-15107.patch
+Patch3:         dnsmasq-2.78-fips.patch
 
 
 BuildRequires:  dbus-devel
@@ -58,6 +59,7 @@ server's leases.
 %setup -q -n %{name}-%{version}%{?extraversion}
 %patch1 -p1 -b .underflow
 %patch2 -p1 -b .CVE-2017-15107
+%patch3 -p1 -b .fips
 
 # use /var/lib/dnsmasq instead of /var/lib/misc
 for file in dnsmasq.conf.example man/dnsmasq.8 man/es/dnsmasq.8 src/config.h; do
@@ -157,6 +159,9 @@ install -Dpm 644 %{SOURCE2} %{buildroot}%{_sysusersdir}/dnsmasq.conf
 %{_mandir}/man1/dhcp_*
 
 %changelog
+* Fri Mar 02 2018 Petr Menšík <pemensik@redhat.com> - 2.78-7
+- Emit warning with dnssec enabled on FIPS system (#1549507)
+
 * Sun Feb 25 2018 Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> - 2.78-6
 - Create user before installing files (#1548050)