feat: add tests for gssapi-with-mic

feat: tests set hostname for sshd, make GSSAPIStrictAcceptorCheck yes pass

feat: add GSSAPI_TESTING cmake option

feat: gssapi libssh server test

feat: make kdc setup and teardown functions

feat: add kinit, kadmin scripts to kdc setup function

feat: add some client gssapi auth tests

Signed-off-by: Gauravsingh Sisodia <xaerru@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Sahana Prasad <sahana@redhat.com>

tests/gss/kdcsetup.sh

@@ -0,0 +1,52 @@
+#!/bin/sh
+
+SOCKDIR=$1
+WORKDIR=$SOCKDIR/gss
+
+mkdir "$WORKDIR"/k  "$WORKDIR"/d
+
+cat<<EOF > "$WORKDIR"/k/kdc.conf
+[realms]
+    LIBSSH.SITE = {
+        database_name = $WORKDIR/principal
+        key_stash_file = $WORKDIR/stash
+        kdc_listen = $(hostname -f)
+        kdc_tcp_listen = $(hostname -f)
+        default_principal_flags = +preauth
+    }
+[logging]
+   kdc = FILE:$WORKDIR/kdc.log
+   debug = true
+EOF
+
+cat<<EOF > "$WORKDIR"/k/krb5.conf
+[libdefaults]
+        default_realm = LIBSSH.SITE
+
+[realms]
+        LIBSSH.SITE = {
+                kdc = $(hostname -f)
+        }
+[domain_realm]
+        .$(hostname -d) = LIBSSH.SITE
+
+EOF
+
+kdb5_util -P foo create -s
+
+bash "$WORKDIR"/kadmin.sh
+
+krb5kdc -w 1 -P "$WORKDIR"/pid
+
+# Wait till KDC binds to the ports, 0x58 is port 88
+i=0
+while [ ! -S "$SOCKDIR"/T0B0058 ] && [ ! -S "$SOCKDIR"/U0B0058 ]; do
+    i=$((i + 1))
+    [ "$i" -eq 5 ] && exit 1
+    sleep 1
+done
+
+bash "$WORKDIR"/kinit.sh
+
+klist
+exit 0