Merge branch 'https' into 'main'

implement https

See merge request toheer/iot-security-tools!2

.gitignore

@@ -880,3 +880,4 @@ Temporary Items
 
 .pio/
 .vscode/
+SourceCode/arduino/lib/esp32_https_server/

SourceCode/arduino/lib/Firewall/Firewall.cpp

@@ -1,11 +1,15 @@
 #include "Firewall.h"
 
-ESPFirewall::ESPFirewall(int port)
+ESPFirewall::ESPFirewall(int api_port)
 {
     this->setup_eeprom();
-    log_i("Starting Firewall-API on %i", port);
-    this->firewall_api = new AsyncWebServer(port);
-    this->setup_routing();
+    this->setup_certificate();
+    this->setup_firewall_api(api_port);
+}
+
+void ESPFirewall::handle_firewall_api_clients()
+{
+    this->firewall_api->loop();
 }
 
 String ESPFirewall::protocol_to_string(firewall_protocol_t &protocol)
@@ -21,11 +25,11 @@ String ESPFirewall::protocol_to_string(firewall_protocol_t &protocol)
     }
 }
 
-firewall_protocol_t ESPFirewall::string_to_protocol(String &protocol)
+firewall_protocol_t ESPFirewall::string_to_protocol(std::string &protocol)
 {
-    if (protocol.equals("TCP"))
+    if (protocol.compare("TCP") == 0)
         return FW_TCP;
-    else if (protocol.equals("UDP"))
+    else if (protocol.compare("UDP") == 0)
         return FW_UDP;
     else
         return FW_ALL;
@@ -44,11 +48,11 @@ String ESPFirewall::target_to_string(firewall_target_t &target)
     }
 }
 
-firewall_target_t ESPFirewall::string_to_target(String &target)
+firewall_target_t ESPFirewall::string_to_target(std::string &target)
 {
-    if (target.equals("REJECT"))
+    if (target.compare("REJECT") == 0)
         return FW_REJECT;
-    else if (target.equals("DROP"))
+    else if (target.compare("DROP") == 0)
         return FW_DROP;
     else
         return FW_ACCEPT;
@@ -206,30 +210,70 @@ bool ESPFirewall::delete_rule_from_firewall(uint8_t key)
     return true;
 }
 
-void ESPFirewall::setup_routing()
+void ESPFirewall::setup_certificate()
 {
-    this->firewall_api->on("^\\/api/v1/firewall\\/([0-9]+)$", HTTP_GET, std::bind(&ESPFirewall::get_firewall_rule_handler, this, std::placeholders::_1));
-    this->firewall_api->on("/api/v1/firewall", HTTP_GET, std::bind(&ESPFirewall::get_firewall_rules_handler, this, std::placeholders::_1));
-    this->firewall_api->on("/api/v1/firewall", HTTP_POST, std::bind(&ESPFirewall::post_firewall_handler, this, std::placeholders::_1));
-    this->firewall_api->on("^\\/api/v1/firewall\\/([0-9]+)$", HTTP_DELETE, std::bind(&ESPFirewall::delete_firewall_handler, this, std::placeholders::_1));
-
-    this->firewall_api->on("/api/v1/device/restart", HTTP_GET, std::bind(&ESPFirewall::restart_device_handler, this, std::placeholders::_1));
-    this->firewall_api->onNotFound(std::bind(&ESPFirewall::not_found, this, std::placeholders::_1));
-    this->firewall_api->begin();
+    log_i("Creating the certificate...");
+    this->certificate = new SSLCert();
+    int createCertResult = createSelfSignedCert(
+        *this->certificate,
+        KEYSIZE_2048,
+        "CN=myesp32.local,O=Firewall,C=DE",
+        "20220101000000",
+        "20320101000000");
+    if (createCertResult != 0)
+    {
+        log_e("Cerating certificate failed. Error Code = 0x%02X, check SSLCert.hpp for details", createCertResult);
+        while (true)
+            delay(500);
+    }
+    log_i("Creating the certificate was successful");
 }
 
-void ESPFirewall::json_message_response(AsyncWebServerRequest *request, String message, int response_code)
+void ESPFirewall::setup_firewall_api(int api_port)
 {
-    DynamicJsonDocument json(256);
-    String response;
+    this->firewall_api = new HTTPSServer(this->certificate, api_port, 5);
+    ResourceNode *get_firewall_rule = new ResourceNode("/api/v1/firewall/*", "GET", std::bind(&ESPFirewall::get_firewall_rule_handler, this, std::placeholders::_1, std::placeholders::_2));
+    ResourceNode *get_firewall_rules = new ResourceNode("/api/v1/firewall", "GET", std::bind(&ESPFirewall::get_firewall_rules_handler, this, std::placeholders::_1, std::placeholders::_2));
+    ResourceNode *post_firewall = new ResourceNode("/api/v1/firewall", "POST", std::bind(&ESPFirewall::post_firewall_handler, this, std::placeholders::_1, std::placeholders::_2));
+    ResourceNode *delete_firewall = new ResourceNode("/api/v1/firewall/*", "DELETE", std::bind(&ESPFirewall::delete_firewall_handler, this, std::placeholders::_1, std::placeholders::_2));
+    ResourceNode *restart_device = new ResourceNode("/api/v1/device/restart", "GET", std::bind(&ESPFirewall::restart_device_handler, this, std::placeholders::_1, std::placeholders::_2));
+    ResourceNode *not_found = new ResourceNode("", "GET", std::bind(&ESPFirewall::not_found_handler, this, std::placeholders::_1, std::placeholders::_2));
+    this->firewall_api->registerNode(get_firewall_rule);
+    this->firewall_api->registerNode(get_firewall_rules);
+    this->firewall_api->registerNode(post_firewall);
+    this->firewall_api->registerNode(delete_firewall);
+    this->firewall_api->setDefaultNode(restart_device);
+    this->firewall_api->setDefaultNode(not_found);
+
+    log_i("Starting server...");
+    this->firewall_api->start();
+    if (this->firewall_api->isRunning())
+    {
+        log_i("Server ready.");
+    }
+}
+
+void ESPFirewall::json_generic_response(HTTPResponse *response, String serialized, int response_code)
+{
+    response->setHeader("Content-Type", "application/json");
+    response->setStatusCode(response_code);
+    response->println(serialized);
+}
+
+void ESPFirewall::json_message_response(HTTPResponse *response, String message, int response_code)
+{
+    response->setHeader("Content-Type", "application/json");
+    response->setStatusCode(response_code);
+    StaticJsonDocument<96> json;
+    String serialized;
     json["message"] = message;
-    serializeJson(json, response);
-    request->send(response_code, "application/json", response);
+    serializeJson(json, serialized);
+    response->println(serialized);
 }
 
 String ESPFirewall::construct_json_firewall_rule(firewall_rule_t *rule_ptr)
 {
-    StaticJsonDocument<192> doc;
+    StaticJsonDocument<256> doc;
     doc["key"] = rule_ptr->key;
     doc["source"] = rule_ptr->source;
     doc["destination"] = rule_ptr->destination;
@@ -262,77 +306,88 @@ String ESPFirewall::construct_json_firewall()
     return response;
 }
 
-void ESPFirewall::not_found(AsyncWebServerRequest *request)
+void ESPFirewall::not_found_handler(HTTPRequest *request, HTTPResponse *response)
 {
-    this->json_message_response(request, "not found", 404);
+    this->json_message_response(response, "not found", 404);
 }
 
-void ESPFirewall::restart_device_handler(AsyncWebServerRequest *request)
+void ESPFirewall::restart_device_handler(HTTPRequest *request, HTTPResponse *response)
 {
-    this->json_message_response(request, "restarting device in 2 sec", 200);
+    this->json_message_response(response, "restarting device in 2 sec", 200);
     sleep(2000);
     esp_restart();
 }
 
-void ESPFirewall::get_firewall_rule_handler(AsyncWebServerRequest *request)
+void ESPFirewall::get_firewall_rule_handler(HTTPRequest *request, HTTPResponse *response)
 {
-    int rule_number = request->pathArg(0).toInt();
+    ResourceParameters *params = request->getParams();
+    int rule_number = atoi(params->getPathParameter(0).c_str());
     firewall_rule_t *rule_ptr = this->get_rule_from_firewall(rule_number);
     if (rule_ptr == NULL)
     {
-        this->json_message_response(request, "rule not found", 404);
+        this->json_message_response(response, "rule not found", 404);
     }
     else
     {
-        request->send(200, "application/json", this->construct_json_firewall_rule(rule_ptr));
+        response->setHeader("Content-Type", "application/json");
+        response->setStatusCode(200);
+        response->print(this->construct_json_firewall_rule(rule_ptr));
     }
 }
 
-void ESPFirewall::get_firewall_rules_handler(AsyncWebServerRequest *request)
+void ESPFirewall::get_firewall_rules_handler(HTTPRequest *request, HTTPResponse *response)
 {
-    String response = this->construct_json_firewall();
-    request->send(200, "application/json", response);
+    this->json_generic_response(response, this->construct_json_firewall(), 200);
 }
 
-bool ESPFirewall::request_has_firewall_parameter(AsyncWebServerRequest *request)
+bool ESPFirewall::request_has_firewall_parameter(ResourceParameters *params)
 {
-    return request->hasParam("source") || request->hasParam("destination") || request->hasParam("protocol") || request->hasParam("target");
+    return params->isQueryParameterSet("source") || params->isQueryParameterSet("destination") || params->isQueryParameterSet("protocol") || params->isQueryParameterSet("target");
 }
 
-void ESPFirewall::post_firewall_handler(AsyncWebServerRequest *request)
+void ESPFirewall::post_firewall_handler(HTTPRequest *request, HTTPResponse *response)
 {
-    if (request_has_firewall_parameter(request))
+    ResourceParameters *params = request->getParams();
+    if (request_has_firewall_parameter(params))
     {
         firewall_rule_t *rule_ptr = (firewall_rule_t *)malloc(sizeof(firewall_rule_t));
         rule_ptr->key = ++amount_of_rules;
 
         // carefully copying c-string that is shorter then the destination char-array length
-        String source = request->getParam("source")->value();
+        std::string source;
+        params->getQueryParameter("source", source);
         strcpy(rule_ptr->source, source.length() <= IP4ADDR_STRLEN_MAX ? source.c_str() : "");
-        String destination = request->getParam("destination")->value();
+        std::string destination;
+        params->getQueryParameter("destination", destination);
         strcpy(rule_ptr->destination, destination.length() <= IP4ADDR_STRLEN_MAX ? destination.c_str() : "");
 
-        String protocol = request->getParam("protocol")->value();
+        std::string protocol;
+        params->getQueryParameter("protocol", protocol);
         rule_ptr->protocol = string_to_protocol(protocol);
-        String target = request->getParam("target")->value();
+        std::string target;
+        params->getQueryParameter("target", target);
         rule_ptr->target = string_to_target(target);
 
         this->add_rule_to_firewall(rule_ptr);
         this->eeprom_write_firewall_rule(rule_ptr);
-        request->send(200, "application/json", this->construct_json_firewall_rule(rule_ptr));
+        this->json_generic_response(response, this->construct_json_firewall_rule(rule_ptr), 200);
     }
     else
     {
-        this->json_message_response(request, "not enough parameter", 200);
+        this->json_message_response(response, "not enough parameter", 400);
     }
 }
 
-void ESPFirewall::delete_firewall_handler(AsyncWebServerRequest *request)
+void ESPFirewall::delete_firewall_handler(HTTPRequest *request, HTTPResponse *response)
 {
-    int rule_number = request->pathArg(0).toInt();
+    ResourceParameters *params = request->getParams();
+    int rule_number = atoi(params->getPathParameter(0).c_str());
     if (this->delete_rule_from_firewall(rule_number))
     {
-        this->json_message_response(request, "firewall rule deleted", 200);
+        this->json_message_response(response, "firewall rule deleted", 200);
+    }
+    else
+    {
+        this->json_message_response(response, "cannot delete firewall rule", 500);
     }
-    this->json_message_response(request, "cannot delete firewall rule", 500);
 }

SourceCode/arduino/lib/Firewall/Firewall.h

@@ -2,19 +2,16 @@
 #define FIREWALL_H
 
 #include "Arduino.h"
-#include "AsyncJson.h"
 #include "ArduinoJson.h"
 #include "EEPROM.h"
-#ifdef ESP32
-#include "WiFi.h"
-#include "AsyncTCP.h"
-#elif defined(ESP8266)
-#include "ESP8266WiFi.h"
-#include "ESPAsyncTCP.h"
-#endif
-#include "ESPAsyncWebServer.h"
+
+#include "HTTPSServer.hpp"
+#include "SSLCert.hpp"
+#include "HTTPRequest.hpp"
+#include "HTTPResponse.hpp"
 
 #define eeprom_start_firewall_rules 4
+using namespace httpsserver;
 
 typedef enum firewall_target : uint8_t
 {
@@ -49,13 +46,14 @@ class ESPFirewall
     int eeprom_rules_head = eeprom_start_firewall_rules;
     struct firewall_rule *head = NULL;
 
-    AsyncWebServer *firewall_api;
+    HTTPSServer *firewall_api;
+    SSLCert *certificate;
 
     // Protocol / Target conversion
     String protocol_to_string(firewall_protocol_t &);
-    firewall_protocol_t string_to_protocol(String &);
+    firewall_protocol_t string_to_protocol(std::string &);
     String target_to_string(firewall_target_t &);
-    firewall_target_t string_to_target(String &);
+    firewall_target_t string_to_target(std::string &);
 
     // EEPROM
     void setup_eeprom();
@@ -70,20 +68,23 @@ class ESPFirewall
     bool delete_rule_from_firewall(uint8_t);
 
     // Firewall-API Actions
-    void setup_routing();
-    void json_message_response(AsyncWebServerRequest *, String, int);
+    void setup_certificate();
+    void setup_firewall_api(int);
+    void json_generic_response(HTTPResponse *, String, int);
+    void json_message_response(HTTPResponse *, String, int);
     String construct_json_firewall_rule(firewall_rule_t *);
     String construct_json_firewall();
-    void not_found(AsyncWebServerRequest *);
-    void restart_device_handler(AsyncWebServerRequest *);
-    void get_firewall_rule_handler(AsyncWebServerRequest *);
-    void get_firewall_rules_handler(AsyncWebServerRequest *);
-    bool request_has_firewall_parameter(AsyncWebServerRequest *);
-    void post_firewall_handler(AsyncWebServerRequest *);
-    void delete_firewall_handler(AsyncWebServerRequest *);
+    void not_found_handler(HTTPRequest *, HTTPResponse *);
+    void restart_device_handler(HTTPRequest *, HTTPResponse *);
+    void get_firewall_rule_handler(HTTPRequest *, HTTPResponse *);
+    void get_firewall_rules_handler(HTTPRequest *, HTTPResponse *);
+    bool request_has_firewall_parameter(ResourceParameters *);
+    void post_firewall_handler(HTTPRequest *, HTTPResponse *);
+    void delete_firewall_handler(HTTPRequest *, HTTPResponse *);
 
 public:
     ESPFirewall(int port = 8080);
+    void handle_firewall_api_clients();
 };
 
 #endif

SourceCode/arduino/platformio.ini

@@ -13,21 +13,17 @@ platform = espressif32
 board = esp32-evb
 framework = arduino
 monitor_speed = 115200
-build_flags =
+build_flags = 
 	-DCORE_DEBUG_LEVEL=3
-  	-DASYNCWEBSERVER_REGEX
-lib_deps =
+lib_deps = 
 	bblanchon/ArduinoJson@^6.19.4
-	ottowinter/ESPAsyncWebServer-esphome@^2.1.0
 
 [env:esp32-dev]
 platform = espressif32
 board = az-delivery-devkit-v4
 framework = arduino
 monitor_speed = 115200
-build_flags =
+build_flags = 
 	-DCORE_DEBUG_LEVEL=3
-  	-DASYNCWEBSERVER_REGEX
-lib_deps =
+lib_deps = 
 	bblanchon/ArduinoJson@^6.19.4
-	ottowinter/ESPAsyncWebServer-esphome@^2.1.0

SourceCode/arduino/src/main.cpp

@@ -1,5 +1,6 @@
-#include <Arduino.h>
+#include "Arduino.h"
 #include "theSecrets.h"
+#include "WiFi.h"
 #include "Firewall.h"
 #include "esp32-hal-log.h"
 
@@ -30,4 +31,5 @@ void setup()
 
 void loop()
 {
+  firewall->handle_firewall_api_clients();
 }