TlsTcpClient for Particle Photn, Now release version 0.1.0.

TLS TCP client library cloud not use on Particle Photon WebIDE, but NOW we can use TLS TCP simple client library based by mbedTLS. Here is sample source code. Developer can connect to every TLS web/server using that Root CA pem file.

#include "application.h"

#include "TlsTcpClient/TlsTcpClient.h"

// Photon connect Let's Encrypt Website in this example.
#define LET_ENCRYPT_CA_PEM                                              \
"-----BEGIN CERTIFICATE----- \r\n"                                      \
"MIIFazCCA1OgAwIBAgIRAIIQz7DSQONZRGPgu2OCiwAwDQYJKoZIhvcNAQELBQAw\r\n"  \
"TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh\r\n"  \
"cmNoIEdyb3VwMRUwEwYDVQQDEwxJU1JHIFJvb3QgWDEwHhcNMTUwNjA0MTEwNDM4\r\n"  \
"WhcNMzUwNjA0MTEwNDM4WjBPMQswCQYDVQQGEwJVUzEpMCcGA1UEChMgSW50ZXJu\r\n"  \
"ZXQgU2VjdXJpdHkgUmVzZWFyY2ggR3JvdXAxFTATBgNVBAMTDElTUkcgUm9vdCBY\r\n"  \
"MTCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIBAK3oJHP0FDfzm54rVygc\r\n"  \
"h77ct984kIxuPOZXoHj3dcKi/vVqbvYATyjb3miGbESTtrFj/RQSa78f0uoxmyF+\r\n"  \
"0TM8ukj13Xnfs7j/EvEhmkvBioZxaUpmZmyPfjxwv60pIgbz5MDmgK7iS4+3mX6U\r\n"  \
"A5/TR5d8mUgjU+g4rk8Kb4Mu0UlXjIB0ttov0DiNewNwIRt18jA8+o+u3dpjq+sW\r\n"  \
"T8KOEUt+zwvo/7V3LvSye0rgTBIlDHCNAymg4VMk7BPZ7hm/ELNKjD+Jo2FR3qyH\r\n"  \
"B5T0Y3HsLuJvW5iB4YlcNHlsdu87kGJ55tukmi8mxdAQ4Q7e2RCOFvu396j3x+UC\r\n"  \
"B5iPNgiV5+I3lg02dZ77DnKxHZu8A/lJBdiB3QW0KtZB6awBdpUKD9jf1b0SHzUv\r\n"  \
"KBds0pjBqAlkd25HN7rOrFleaJ1/ctaJxQZBKT5ZPt0m9STJEadao0xAH0ahmbWn\r\n"  \
"OlFuhjuefXKnEgV4We0+UXgVCwOPjdAvBbI+e0ocS3MFEvzG6uBQE3xDk3SzynTn\r\n"  \
"jh8BCNAw1FtxNrQHusEwMFxIt4I7mKZ9YIqioymCzLq9gwQbooMDQaHWBfEbwrbw\r\n"  \
"qHyGO0aoSCqI3Haadr8faqU9GY/rOPNk3sgrDQoo//fb4hVC1CLQJ13hef4Y53CI\r\n"  \
"rU7m2Ys6xt0nUW7/vGT1M0NPAgMBAAGjQjBAMA4GA1UdDwEB/wQEAwIBBjAPBgNV\r\n"  \
"HRMBAf8EBTADAQH/MB0GA1UdDgQWBBR5tFnme7bl5AFzgAiIyBpY9umbbjANBgkq\r\n"  \
"hkiG9w0BAQsFAAOCAgEAVR9YqbyyqFDQDLHYGmkgJykIrGF1XIpu+ILlaS/V9lZL\r\n"  \
"ubhzEFnTIZd+50xx+7LSYK05qAvqFyFWhfFQDlnrzuBZ6brJFe+GnY+EgPbk6ZGQ\r\n"  \
"3BebYhtF8GaV0nxvwuo77x/Py9auJ/GpsMiu/X1+mvoiBOv/2X/qkSsisRcOj/KK\r\n"  \
"NFtY2PwByVS5uCbMiogziUwthDyC3+6WVwW6LLv3xLfHTjuCvjHIInNzktHCgKQ5\r\n"  \
"ORAzI4JMPJ+GslWYHb4phowim57iaztXOoJwTdwJx4nLCgdNbOhdjsnvzqvHu7Ur\r\n"  \
"TkXWStAmzOVyyghqpZXjFaH3pO3JLF+l+/+sKAIuvtd7u+Nxe5AW0wdeRlN8NwdC\r\n"  \
"jNPElpzVmbUq4JUagEiuTDkHzsxHpFKVK7q4+63SM1N95R1NbdWhscdCb+ZAJzVc\r\n"  \
"oyi3B43njTOQ5yOf+1CceWxG1bQVs5ZufpsMljq4Ui0/1lvh+wjChP4kqKOJ2qxq\r\n"  \
"4RgqsahDYVvTH9w7jXbyLeiNdd8XM2w9U/t7y0Ff/9yi0GE44Za4rF2LN9d11TPA\r\n"  \
"mRGunUHBcnWEvgJBQl9nJEiU0Zsnvgc/ubhPgXRR4Xq37Z0j4r7g1SgEEzwxA57d\r\n"  \
"emyPxgcYxn/eR44/KJ4EBs+lVDR3veyJm+kXQ99b21/+jh5Xos1AnX5iItreGCc=\r\n"  \
"-----END CERTIFICATE----- \r\n"
const char letencryptCaPem[] = LET_ENCRYPT_CA_PEM;

void setup() {
    Serial.begin(9600);
}

void loop() {
    unsigned char buff[256];

    TlsTcpClient client;

    // setup Root CA pem.
    client.init(letencryptCaPem, sizeof(letencryptCaPem));
    
    // connect HTTPS server.
    client.connect("www.hirotakaster.com", 443);
    
    // send to HTTPS request.
    int len = sprintf((char *)buff, "GET /robots.txt HTTP/1.0\r\nHost: www.hirotakaster.com\r\nContent-Length: 0\r\n\r\n");
    client.write(buff, len );

    // GET HTTPS request.
    memset(buff, 0, sizeof(buff));
    while(1) {
        if (!client.available()) {
            delay(100);
        } else {
            int ret = client.read(buff, sizeof(buff) - 1);
            if (ret > 0) {
                Serial.println((char *)buff);
                break;
            }
        }
    };
    delay(5000);
}

This library already add to Particle WebIDE contribute library, it can use very easy.

This is my web server(this blog) and Photon TLS sequence and cipher spec captured with Wireshark. Cipher suites are AES128/256 based.