freeswitch-stable: fix weak md in gentls_cert

gentls_cert generates certificates that are deemed too weak by Debian's
OpenSSL (on Buster and up). This patch upgrades the message digest to
SHA256 to address this.

See patch for details. Sent upstream ([1]).

[1] https://github.com/signalwire/freeswitch/pull/126

Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>

diff --git a/net/freeswitch-stable/patches/040-gentls_cert_update_message_digest.patch b/net/freeswitch-stable/patches/040-gentls_cert_update_message_digest.patch
new file mode 100644 (file)
index 0000000..ff5226d
--- /dev/null
+++ b/net/freeswitch-stable/patches/040-gentls_cert_update_message_digest.patch
@@ -0,0 +1,51 @@
+commit 70d1cbafe4ab0176cd9fc01f740e34cd1bae326b
+Author: Sebastian Kemper <sebastian_ml@gmx.net>
+Date:   Wed Nov 13 20:29:50 2019 +0100
+
+    [gentls_cert] Update message digest
+    
+    Debian Buster updated /etc/ssl/openssl.cnf to default to
+    
+    MinProtocol = TLSv1.2
+    CipherString = DEFAULT@SECLEVEL=2
+    
+    gentls_cert currently uses SHA1 as message digest. According to OpenSSL
+    documentation this only offers 80 bit of security. 80 bits is enough for
+    security level 1, but not 2.
+    
+    The OpenSSL default MD nowadays is SHA256. This commit updates
+    gentls_cert to use it.
+    
+    Issue was reported on the FS mailing list. The certificates created by
+    gentls_cert caused "md too weak" errors and clients were unable to
+    connect.
+    
+    Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>
+
+diff --git a/scripts/gentls_cert.in b/scripts/gentls_cert.in
+index 43aa8ac605..dd56c9f6dc 100644
+--- a/scripts/gentls_cert.in
++++ b/scripts/gentls_cert.in
+@@ -89,7 +89,7 @@ setup_ca() {
+ 
+       openssl req -out "${CONFDIR}/CA/cacert.pem" \
+               -new -x509 -keyout "${CONFDIR}/CA/cakey.pem" \
+-              -config "${TMPFILE}.cfg" -nodes -days ${DAYS} -sha1 >/dev/null || exit 1
++              -config "${TMPFILE}.cfg" -nodes -days ${DAYS} -sha256 >/dev/null || exit 1
+       cat "${CONFDIR}/CA/cacert.pem" > "${CONFDIR}/cafile.pem"
+       cp $TMPFILE.cfg /tmp/ssl.cfg
+       rm "${TMPFILE}.cfg"
+@@ -131,11 +131,11 @@ generate_cert() {
+ 
+       openssl req -new -out "${TMPFILE}.req" \
+               -newkey rsa:${KEY_SIZE} -keyout "${TMPFILE}.key" \
+-              -config "${TMPFILE}.cfg" -nodes -sha1 >/dev/null || exit 1
++              -config "${TMPFILE}.cfg" -nodes -sha256 >/dev/null || exit 1
+ 
+       openssl x509 -req -CAkey "${CONFDIR}/CA/cakey.pem" -CA "${CONFDIR}/CA/cacert.pem" -CAcreateserial \
+               -in "${TMPFILE}.req" -out "${TMPFILE}.crt" -extfile "${TMPFILE}.cfg" \
+-              -extensions "${EXTENSIONS}" -days ${DAYS} -sha1 >/dev/null || exit 1
++              -extensions "${EXTENSIONS}" -days ${DAYS} -sha256 >/dev/null || exit 1
+ 
+       cat "${TMPFILE}.crt" "${TMPFILE}.key" > "${CONFDIR}/${OUTFILE}"
+