tests: Convert existing test case to use file descriptor for reading …

…password

Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>

tests/_test_save_load_encrypted_state

@@ -305,9 +305,11 @@ sha1_permanent=$(get_sha1_file "${STATE_FILE}")
 echo "sha1(volatile) : $sha1_volatile"
 echo "sha1(permanent): $sha1_permanent"
 
+exec 101<$keyfile
 run_swtpm ${SWTPM_INTERFACE} \
-	--key pwdfile=$keyfile \
+	--key pwdfd=101 \
 	--log file=$logfile
+exec 101>&-
 
 display_processes_by_name "$SWTPM"