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WiFiClientSecure: add example of setCACert/verifyCertChain
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‎libraries/ESP8266WiFi/examples/HTTPSRequestCACert/CACert.ino

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const unsigned char caCert[] = {
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0xf8, 0xe9, 0x2e, 0x13, 0xa3, 0x77, 0xe8, 0x1f, 0x4a
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};
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const unsigned int caCertLen = 969;
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‎libraries/ESP8266WiFi/examples/HTTPSRequestCACert/HTTPSRequestCACert.ino

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/*
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HTTP over TLS (HTTPS) example sketch
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This example demonstrates how to use
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WiFiClientSecure class to connect to a TLS server.
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This example verifies server certificate using the
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root CA certificate.
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We fetch and display the status of
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esp8266/Arduino project continuous integration
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build.
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Created by Ivan Grokhotkov, 2017.
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This example is in public domain.
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*/
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#include <time.h>
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#include <ESP8266WiFi.h>
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#include <WiFiClientSecure.h>
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const char* ssid = "........";
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const char* password = "........";
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const char* host = "api.github.com";
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const int httpsPort = 443;
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// Root certificate used by api.github.com.
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// Defined in "CACert" tab.
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extern const unsigned char caCert[];
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extern const unsigned int caCertLen;
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WiFiClientSecure client;
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void setup() {
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Serial.begin(115200);
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Serial.println();
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Serial.print("connecting to ");
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Serial.println(ssid);
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WiFi.begin(ssid, password);
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while (WiFi.status() != WL_CONNECTED) {
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delay(500);
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Serial.print(".");
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}
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Serial.println("");
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Serial.println("WiFi connected");
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Serial.println("IP address: ");
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Serial.println(WiFi.localIP());
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// Synchronize time useing SNTP. This is necessary to verify that
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// the TLS certificates offered by the server are currently valid.
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Serial.print("Setting time using SNTP");
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configTime(8 * 3600, 0, "pool.ntp.org", "time.nist.gov");
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time_t now = time(nullptr);
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while (now < 1000) {
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delay(500);
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Serial.print(".");
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now = time(nullptr);
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}
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Serial.println("");
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struct tm timeinfo;
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gmtime_r(&now, &timeinfo);
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Serial.print("Current time: ");
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Serial.print(asctime(&timeinfo));
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// Load root certificate in DER format into WiFiClientSecure object
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bool res = client.setCACert(caCert, caCertLen);
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if (!res) {
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Serial.println("Failed to load root CA certificate!");
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while (true) {
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yield();
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}
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}
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}
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void loop() {
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// Connect to remote server
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Serial.print("connecting to ");
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Serial.println(host);
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if (!client.connect(host, httpsPort)) {
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Serial.println("connection failed");
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return;
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}
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// Verify validity of server's certificate
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if (client.verifyCertChain(host)) {
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Serial.println("Server certificate verified");
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} else {
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Serial.println("ERROR: certificate verification failed!");
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return;
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}
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String url = "/repos/esp8266/Arduino/commits/master/status";
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Serial.print("requesting URL: ");
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Serial.println(url);
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client.print(String("GET ") + url + " HTTP/1.1\r\n" +
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"Host: " + host + "\r\n" +
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"User-Agent: BuildFailureDetectorESP8266\r\n" +
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"Connection: close\r\n\r\n");
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Serial.println("request sent");
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while (client.connected()) {
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String line = client.readStringUntil('\n');
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if (line == "\r") {
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Serial.println("headers received");
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break;
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}
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}
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String line = client.readStringUntil('\n');
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if (line.startsWith("{\"state\":\"success\"")) {
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Serial.println("esp8266/Arduino CI successfull!");
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} else {
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Serial.println("esp8266/Arduino CI has failed");
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}
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Serial.println("reply was:");
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Serial.println("==========");
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Serial.println(line);
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Serial.println("==========");
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Serial.println();
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static int repeat = 0;
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if (++repeat == 3) {
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Serial.println("Done");
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while (true) {
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delay(1000);
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}
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}
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delay(10000);
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}
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