net-snmp: support openssl without 3des

net-snmp enables 3des support by default and fails to build with distro
feature openssl-no-weak-ciphers:

| ../../net-snmp-5.7.3/snmplib/scapi.c:82:25: fatal error: openssl/des.h: No such file or directory
|  #include <openssl/des.h>

To fix the issue:
* add a patch to include des.h only if it's found in openssl
* disable des when openssl-no-weak-ciphers is enabled

Signed-off-by: Jackie Huang <jackie.huang@windriver.com>
Signed-off-by: Joe MacDonald <joe_macdonald@mentor.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Joe MacDonald <joe_macdonald@mentor.com>

2 files changed, 35 insertions, 1 deletions

diff --git a/meta-networking/recipes-protocols/net-snmp/net-snmp/net-snmp-fix-for-disable-des.patch b/meta-networking/recipes-protocols/net-snmp/net-snmp/net-snmp-fix-for-disable-des.patch
new file mode 100644
index 000000000..25eb9c96f
--- /dev/null
+++ b/meta-networking/recipes-protocols/net-snmp/net-snmp/net-snmp-fix-for-disable-des.patch
@@ -0,0 +1,32 @@
+From 270e952f58a7e5ddeabe5a15e3ddaaadf40017d0 Mon Sep 17 00:00:00 2001
+From: Jackie Huang <jackie.huang@windriver.com>
+Date: Thu, 22 Jun 2017 10:25:08 +0800
+Subject: [PATCH] net-snmp: fix for --disable-des
+
+Include des.h only if it's found in openssl so that
+the --disable-des works correctly.
+
+Upstream-Status: Submitted [net-snmp-coders@lists.sourceforge.net]
+
+Signed-off-by: Jackie Huang <jackie.huang@windriver.com>
+---
+ snmplib/scapi.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/snmplib/scapi.c b/snmplib/scapi.c
+index 16ac829..271684b 100644
+--- a/snmplib/scapi.c
++++ b/snmplib/scapi.c
+@@ -79,7 +79,9 @@ netsnmp_feature_child_of(usm_scapi, usm_support)
+ #include <openssl/hmac.h>
+ #include <openssl/evp.h>
+ #include <openssl/rand.h>
++#ifdef HAVE_OPENSSL_DES_H
+ #include <openssl/des.h>
++#endif
+ #ifdef HAVE_AES
+ #include <openssl/aes.h>
+ #endif
+-- 
+2.11.0
+
diff --git a/meta-networking/recipes-protocols/net-snmp/net-snmp_5.7.3.bb b/meta-networking/recipes-protocols/net-snmp/net-snmp_5.7.3.bb
index af6fd1b1f..849ae0763 100644
--- a/meta-networking/recipes-protocols/net-snmp/net-snmp_5.7.3.bb
+++ b/meta-networking/recipes-protocols/net-snmp/net-snmp_5.7.3.bb
@@ -31,6 +31,7 @@ SRC_URI = "${SOURCEFORGE_MIRROR}/net-snmp/net-snmp-${PV}.zip \
            file://0003-CHANGES-BUG-2712-Fix-Perl-module-compilation.patch \
            file://0004-configure-fix-incorrect-variable.patch \
            file://net-snmp-5.7.2-fix-engineBoots-value-on-SIGHUP.patch \
+           file://net-snmp-fix-for-disable-des.patch \
            "
 SRC_URI[md5sum] = "9f682bd70c717efdd9f15b686d07baee"
 SRC_URI[sha256sum] = "e8dfc79b6539b71a6ff335746ce63d2da2239062ad41872fff4354cafed07a3e"
@@ -59,7 +60,8 @@ EXTRA_OECONF = "--enable-shared \
                 --with-defaults \
                 --with-install-prefix=${D} \
                 --with-persistent-directory=${localstatedir}/lib/net-snmp \
-                ${@base_conditional('SITEINFO_ENDIANNESS', 'le', '--with-endianness=little', '--with-endianness=big', d)}"
+                ${@base_conditional('SITEINFO_ENDIANNESS', 'le', '--with-endianness=little', '--with-endianness=big', d)} \
+"
 
 # net-snmp needs to have mib-modules=smux enabled to enable quagga to support snmp
 EXTRA_OECONF += "--with-mib-modules=smux"