Fix test of none MAC in rekey regression test.

The none MAC is valid in HPN-SSH but it's not enabled by
default in sshd_config. So when the rekey tests tries to test
it then it will fail. This doesn't occur in all scenarious but
absolutely under OSX and other cases in which openssl is disabled.

Author: rapier1

regress/rekey.sh

@@ -88,7 +88,17 @@ for i in $macs; do
 done
 
 for opt in $opts; do
-	verbose "client rekey $opt"
+	# HPN-SSH enables the none MAC but this fails
+	# in the regression tests because, by default,
+	# we don't enable the none MAC so the test
+	# will fail. As such, skip it.
+	# CJR 9/30/2024
+	if echo ${opt} | grep -Eq "none"; then
+	    continue
+	fi
+        verbose "client rekey $opt"
+        if ${SSH} -Q cipher-auth | sed 's/^/Ciphers=/' | \
+            grep $opt >/dev/null; then
 	if ${SSH} -Q cipher-auth | sed 's/^/Ciphers=/' | \
 	    grep $opt >/dev/null; then
 		trace AEAD cipher, testing all KexAlgorithms