af7e489f01
* WiFiClientSecure: add support for PSK (pre-shared key) ciphers * add example for WiFiClientSecure PSK * WiFiClientSecure: added README
86 lines
2.4 KiB
C++
86 lines
2.4 KiB
C++
/*
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Wifi secure connection example for ESP32 using a pre-shared key (PSK)
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This is useful with MQTT servers instead of using a self-signed cert, tested with mosquitto.
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Running on TLS 1.2 using mbedTLS
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To test run a test server using: openssl s_server -accept 8443 -psk 1a2b3c4d -nocert
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It will show the http request made, but there's no easy way to send a reply back...
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2017 - Evandro Copercini - Apache 2.0 License.
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2018 - Adapted for PSK by Thorsten von Eicken
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*/
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#include <WiFiClientSecure.h>
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#if 0
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const char* ssid = "your-ssid"; // your network SSID (name of wifi network)
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const char* password = "your-password"; // your network password
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#else
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const char* ssid = "test"; // your network SSID (name of wifi network)
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const char* password = "securetest"; // your network password
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#endif
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//const char* server = "server.local"; // Server hostname
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const IPAddress server = IPAddress(192, 168, 0, 14); // Server IP address
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const int port = 8443; // server's port (8883 for MQTT)
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const char* pskIdent = "Client_identity"; // PSK identity (sometimes called key hint)
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const char* psKey = "1a2b3c4d"; // PSK Key (must be hex string without 0x)
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WiFiClientSecure client;
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void setup() {
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//Initialize serial and wait for port to open:
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Serial.begin(115200);
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delay(100);
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Serial.print("Attempting to connect to SSID: ");
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Serial.println(ssid);
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WiFi.begin(ssid, password);
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// attempt to connect to Wifi network:
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while (WiFi.status() != WL_CONNECTED) {
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Serial.print(".");
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// wait 1 second for re-trying
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delay(1000);
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}
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Serial.print("Connected to ");
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Serial.println(ssid);
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client.setPreSharedKey(pskIdent, psKey);
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Serial.println("\nStarting connection to server...");
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if (!client.connect(server, port))
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Serial.println("Connection failed!");
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else {
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Serial.println("Connected to server!");
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// Make a HTTP request:
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client.println("GET /a/check HTTP/1.0");
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client.print("Host: ");
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client.println(server);
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client.println("Connection: close");
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client.println();
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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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// if there are incoming bytes available
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// from the server, read them and print them:
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while (client.available()) {
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char c = client.read();
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Serial.write(c);
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}
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client.stop();
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}
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}
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void loop() {
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// do nothing
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}
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