first draft

Author: srieteja

at_lookup/lib/at_lookup.dart

@@ -11,3 +11,4 @@ export 'src/exception/at_lookup_exception.dart';
 export 'src/monitor_client.dart';
 export 'src/cache/secondary_address_finder.dart';
 export 'src/cache/cacheable_secondary_address_finder.dart';
+export 'src/util/secure_socket_util.dart';

at_lookup/lib/src/at_lookup_impl.dart

@@ -470,9 +470,9 @@ class AtLookupImpl implements AtLookUp {
         !(_isPkamAuthenticated || _isCramAuthenticated);
   }
 
-  Future<bool> createOutBoundConnection(host, port, toAtSign) async {
+  Future<bool> createOutBoundConnection(host, port, toAtSign, {decryptPackets = false}) async {
     try {
-      var secureSocket = await SecureSocket.connect(host, int.parse(port));
+      var secureSocket = await SecureSocketUtil.createSecureContext(host, port, decryptPackets: decryptPackets);
       _connection = OutboundConnectionImpl(secureSocket);
       if (outboundConnectionTimeout != null) {
         _connection!.setIdleTime(outboundConnectionTimeout);

at_lookup/lib/src/util/secure_socket_util.dart

@@ -0,0 +1,15 @@
+import 'dart:io';
+class SecureSocketUtil{
+  ///method that creates and returns a [SecureSocket]. If [decryptPackets] is set to true,the TLS keys are logged into a file.
+  static Future<SecureSocket> createSecureContext(host, port, {decryptPackets = false}){
+    if (decryptPackets){
+      SecurityContext securityContext = SecurityContext();
+      File keysFile = File('tls_keys_file');
+      //securityContext.setTrustedCertificates();
+      return SecureSocket.connect(host, int.parse(port), context: securityContext, keyLog: (line) => keysFile.writeAsStringSync(line, mode: FileMode.append));
+    }
+    else{
+      return SecureSocket.connect(host, int.parse(port));
+    }
+  }
+}