Security0 implementation

lib/esp_provisioning_ble.dart

@@ -1,5 +1,6 @@
+export 'src/connection_models.dart';
 export 'src/esp_prov.dart';
 export 'src/security.dart';
+export 'src/security0.dart';
 export 'src/security1.dart';
 export 'src/transport.dart';
-export 'src/connection_models.dart';

lib/src/security.dart

@@ -9,6 +9,11 @@ enum SecurityState {
   finish,
 }
 
+enum Security0State {
+  step0Request,
+  step0Response,
+}
+
 abstract class ProvSecurity {
   Future<Uint8List> encrypt(Uint8List data);
 

lib/src/security0.dart

@@ -0,0 +1,76 @@
+import 'package:flutter/foundation.dart';
+
+import 'protos/generated/sec0.pb.dart';
+import 'protos/generated/session.pb.dart';
+import 'security.dart';
+
+class Security0 implements ProvSecurity {
+  final bool verbose;
+  Security0State sessionState;
+
+  Security0({
+    this.verbose = false,
+    this.sessionState = Security0State.step0Request,
+  });
+
+  void _verbose(dynamic data) {
+    if (verbose) {
+      if (kDebugMode) {
+        print('+++ $data +++');
+      }
+    }
+  }
+
+  @override
+  Future<Uint8List> encrypt(Uint8List data) async {
+    return data;
+  }
+
+  @override
+  Future<Uint8List> decrypt(Uint8List data) async {
+    return data;
+  }
+
+  @override
+  Future<SessionData?> securitySession(SessionData? responseData) async {
+    SessionData? sessionData;
+    switch (sessionState) {
+      case Security0State.step0Request:
+        sessionState = Security0State.step0Response;
+        sessionData = getStep0Request();
+        break;
+
+      case Security0State.step0Response:
+        processStep0Response(responseData);
+        break;
+    }
+    return sessionData;
+  }
+
+  SessionData getStep0Request() {
+    _verbose('step0Request');
+    var setupRequest = SessionData();
+
+    setupRequest.secVer = SecSchemeVersion.SecScheme0;
+
+    S0SessionCmd sc0 = S0SessionCmd();
+    Sec0Payload s0p = Sec0Payload();
+
+    s0p.sc = sc0;
+    setupRequest.sec0 = s0p;
+    return setupRequest;
+  }
+
+  void processStep0Response(SessionData? responseData) {
+    try {
+      if (responseData == null) {
+        throw Exception('No response from device');
+      }
+      if (responseData.secVer != SecSchemeVersion.SecScheme0) {
+        throw Exception('Security version mismatch');
+      }
+    } catch (e) {
+      throw Exception('Unsupported security protocol');
+    }
+  }
+}

pubspec.yaml

@@ -1,6 +1,6 @@
 name: esp_provisioning_ble
 description: A Flutter plugin that simplifies the provisioning configuration of ESP32 modules using Bluetooth Low Energy (BLE). 
-version: 1.0.0
+version: 1.1.0
 homepage: https://github.com/ogabrielinacio/esp_provisioning_ble
 
 environment: