tls13: add helpers to check if psk[_ephemeral] allowed by ticket

Signed-off-by: Pengyu Lv <pengyu.lv@arm.com>
diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index 9444c29..b468c6c 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -2785,6 +2785,20 @@
     return mbedtls_ssl_session_get_ticket_flags(session, flags) == 0;
 }
 
+static inline unsigned int mbedtls_ssl_session_ticket_allow_psk(
+    mbedtls_ssl_session *session)
+{
+    return !mbedtls_ssl_session_check_ticket_flags(session,
+                                                   MBEDTLS_SSL_TLS1_3_TICKET_ALLOW_PSK_RESUMPTION);
+}
+
+static inline unsigned int mbedtls_ssl_session_ticket_allow_psk_ephemeral(
+    mbedtls_ssl_session *session)
+{
+    return !mbedtls_ssl_session_check_ticket_flags(session,
+                                                   MBEDTLS_SSL_TLS1_3_TICKET_ALLOW_PSK_EPHEMERAL_RESUMPTION);
+}
+
 static inline void mbedtls_ssl_session_set_ticket_flags(
     mbedtls_ssl_session *session, unsigned int flags)
 {