Working example for HTTPS over Eduroam network - WifiClient secure library (#2022)

* Working example for HTTPS over Eduroam network

* Update WiFiClientSecureEnterprise.ino

libraries/WiFiClientSecure/examples/WiFiClientSecureEnterprise/WiFiClientSecureEnterprise.ino

+/*|----------------------------------------------------------|*/
+/*|WORKING EXAMPLE FOR HTTPS CONNECTION                      |*/
+/*|TESTED BOARDS: Devkit v1 DOIT, Devkitc v4                 |*/
+/*|CORE: June 2018                                           |*/
+/*|----------------------------------------------------------|*/
+#include <WiFi.h>
+#include <WiFiClientSecure.h>
+#include "esp_wpa2.h"
+#include <Wire.h>
+#define EAP_IDENTITY "identity" //if connecting from another corporation, use identity@organisation.domain in Eduroam 
+#define EAP_PASSWORD "password" //your Eduroam password
+const char* ssid = "eduroam"; // Eduroam SSID
+const char* host = "arduino.php5.sk"; //external server domain for HTTP connection after authentification
+int counter = 0;
+const char* test_root_ca= \
+"-----BEGIN CERTIFICATE-----\n" \
+"MIIDrzCCApegAwIBAgIQCDvgVpBCRrGhdWrJWZHHSjANBgkqhkiG9w0BAQUFADBh\n" \
+"MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3\n" \
+"d3cuZGlnaWNlcnQuY29tMSAwHgYDVQQDExdEaWdpQ2VydCBHbG9iYWwgUm9vdCBD\n" \
+"QTAeFw0wNjExMTAwMDAwMDBaFw0zMTExMTAwMDAwMDBaMGExCzAJBgNVBAYTAlVT\n" \
+"MRUwEwYDVQQKEwxEaWdpQ2VydCBJbmMxGTAXBgNVBAsTEHd3dy5kaWdpY2VydC5j\n" \
+"b20xIDAeBgNVBAMTF0RpZ2lDZXJ0IEdsb2JhbCBSb290IENBMIIBIjANBgkqhkiG\n" \
+"9w0BAQEFAAOCAQ8AMIIBCgKCAQEA4jvhEXLeqKTTo1eqUKKPC3eQyaKl7hLOllsB\n" \
+"CSDMAZOnTjC3U/dDxGkAV53ijSLdhwZAAIEJzs4bg7/fzTtxRuLWZscFs3YnFo97\n" \
+"nh6Vfe63SKMI2tavegw5BmV/Sl0fvBf4q77uKNd0f3p4mVmFaG5cIzJLv07A6Fpt\n" \
+"43C/dxC//AH2hdmoRBBYMql1GNXRor5H4idq9Joz+EkIYIvUX7Q6hL+hqkpMfT7P\n" \
+"T19sdl6gSzeRntwi5m3OFBqOasv+zbMUZBfHWymeMr/y7vrTC0LUq7dBMtoM1O/4\n" \
+"gdW7jVg/tRvoSSiicNoxBN33shbyTApOB6jtSj1etX+jkMOvJwIDAQABo2MwYTAO\n" \
+"BgNVHQ8BAf8EBAMCAYYwDwYDVR0TAQH/BAUwAwEB/zAdBgNVHQ4EFgQUA95QNVbR\n" \
+"TLtm8KPiGxvDl7I90VUwHwYDVR0jBBgwFoAUA95QNVbRTLtm8KPiGxvDl7I90VUw\n" \
+"DQYJKoZIhvcNAQEFBQADggEBAMucN6pIExIK+t1EnE9SsPTfrgT1eXkIoyQY/Esr\n" \
+"hMAtudXH/vTBH1jLuG2cenTnmCmrEbXjcKChzUyImZOMkXDiqw8cvpOp/2PV5Adg\n" \
+"06O/nVsJ8dWO41P0jmP6P6fbtGbfYmbW0W5BjfIttep3Sp+dWOIrWcBAI+0tKIJF\n" \
+"PnlUkiaY4IBIqDfv8NZ5YBberOgOzW6sRBc4L0na4UU+Krk2U886UAb3LujEV0ls\n" \
+"YSEY1QSteDwsOoBrp+uvFRTp2InBuThs4pFsiv9kuXclVzDAGySj4dzp30d8tbQk\n" \
+"CAUw7C29C79Fv1C5qfPrmAESrciIxpg0X40KPMbp1ZWVbd4=\n" \
+"-----END CERTIFICATE-----\n";
+// You can use x.509 client certificates if you want
+//const char* test_client_key = "";   //to verify the client
+//const char* test_client_cert = "";  //to verify the client
+WiFiClientSecure client;
+void setup() {
+  Serial.begin(115200);
+  delay(10);
+  Serial.println();
+  Serial.print("Connecting to network: ");
+  Serial.println(ssid);
+  WiFi.disconnect(true);  //disconnect form wifi to set new wifi connection
+  WiFi.mode(WIFI_STA); //init wifi mode
+  esp_wifi_sta_wpa2_ent_set_identity((uint8_t *)EAP_IDENTITY, strlen(EAP_IDENTITY)); //provide identity
+  esp_wifi_sta_wpa2_ent_set_username((uint8_t *)EAP_IDENTITY, strlen(EAP_IDENTITY)); //provide username --> identity and username is same
+  esp_wifi_sta_wpa2_ent_set_password((uint8_t *)EAP_PASSWORD, strlen(EAP_PASSWORD)); //provide password
+  esp_wpa2_config_t config = WPA2_CONFIG_INIT_DEFAULT(); //set config settings to default
+  esp_wifi_sta_wpa2_ent_enable(&config); //set config settings to enable function
+  WiFi.begin(ssid); //connect to wifi
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+    counter++;
+    if(counter>=60){ //after 30 seconds timeout - reset board
+      ESP.restart();
+    }
+  }
+  client.setCACert(test_root_ca);
+  //client.setCertificate(test_client_key); // for client verification
+  //client.setPrivateKey(test_client_cert);  // for client verification
+  Serial.println("");
+  Serial.println("WiFi connected");
+  Serial.println("IP address set: "); 
+  Serial.println(WiFi.localIP()); //print LAN IP
+}
+void loop() {
+  if (WiFi.status() == WL_CONNECTED) { //if we are connected to Eduroam network
+    counter = 0; //reset counter
+    Serial.println("Wifi is still connected with IP: "); 
+    Serial.println(WiFi.localIP());   //inform user about his IP address
+  }else if (WiFi.status() != WL_CONNECTED) { //if we lost connection, retry
+    WiFi.begin(ssid);      
+  }
+  while (WiFi.status() != WL_CONNECTED) { //during lost connection, print dots
+    delay(500);
+    Serial.print(".");
+    counter++;
+    if(counter>=60){ //30 seconds timeout - reset board
+    ESP.restart();
+    }
+  }
+  Serial.print("Connecting to website: ");
+  Serial.println(host);
+  if (client.connect(host, 443)) {
+    String url = "/rele/rele1.txt";
+    client.print(String("GET ") + url + " HTTP/1.1\r\n" + "Host: " + host + "\r\n" + "User-Agent: ESP32\r\n" + "Connection: close\r\n\r\n");
+    while (client.connected()) {
+      String header = client.readStringUntil('\n');
+      Serial.println(header);
+      if (header == "\r") {
+        break;
+      }
+    }
+    String line = client.readStringUntil('\n');
+   Serial.println(line);
+  }else{
+      Serial.println("Connection unsucessful");
+    }
+  delay(5000);
+}