From 46ebd7128fd38f3eac5289ba281f3f25bad1d899 Mon Sep 17 00:00:00 2001
From: Luca Deri <deri@ntop.org>
Date: Sat, 7 Aug 2021 17:10:18 +0200
Subject: Added ability to report whether a protocol is encrypted

Added new API calls
- u_int8_t ndpi_is_valid_protoId(u_int16_t protoId);
Cleaned up code and organized in a function.

- u_int8_t ndpi_is_encrypted_proto(struct ndpi_detection_module_struct *ndpi_str, ndpi_protocol proto);
Check whether a protocol is encrypted or not based on master and app protocols
---
 src/lib/ndpi_utils.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'src/lib/ndpi_utils.c')

diff --git a/src/lib/ndpi_utils.c b/src/lib/ndpi_utils.c
index 48788c15d..0008835f4 100644
--- a/src/lib/ndpi_utils.c
+++ b/src/lib/ndpi_utils.c
@@ -2226,3 +2226,21 @@ u_int8_t is_a_common_alpn(struct ndpi_detection_module_struct *ndpi_str,
   
   return(0);
 }
+
+/* ******************************************* */
+
+u_int8_t ndpi_is_valid_protoId(u_int16_t protoId) {
+  return((protoId >= NDPI_MAX_SUPPORTED_PROTOCOLS + NDPI_MAX_NUM_CUSTOM_PROTOCOLS) ? 0 : 1);  
+}
+
+/* ******************************************* */
+
+u_int8_t ndpi_is_encrypted_proto(struct ndpi_detection_module_struct *ndpi_str,
+				 ndpi_protocol proto) {
+
+  if(ndpi_is_valid_protoId(proto.master_protocol) && ndpi_is_valid_protoId(proto.app_protocol)) {    
+    return((ndpi_str->proto_defaults[proto.master_protocol].isClearTextProto
+	    && ndpi_str->proto_defaults[proto.app_protocol].isClearTextProto) ? 0 : 1);
+  } else
+    return(0);
+}
-- 
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