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WiFiClientSecure: add example of setCACert/verifyCertChain

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This commit is contained in:
Ivan Grokhotkov 2017-05-22 00:59:47 +08:00 committed by Ivan Grokhotkov
parent 79cfad5d46
commit a8e8ecb687
2 changed files with 218 additions and 0 deletions
libraries/ESP8266WiFi/examples/HTTPSRequestCACert
CACert.inoHTTPSRequestCACert.ino

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libraries/ESP8266WiFi/examples/HTTPSRequestCACert/CACert.ino Normal file

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const unsigned char caCert[] = {
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};
const unsigned int caCertLen = 969;

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libraries/ESP8266WiFi/examples/HTTPSRequestCACert/HTTPSRequestCACert.ino Normal file

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