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Added option for checking mqtt tls against root ca #4703

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Dec 22, 2018
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78 changes: 78 additions & 0 deletions sonoff/my_user_config.h
Original file line number Diff line number Diff line change
Expand Up @@ -248,6 +248,80 @@
// -- MQTT - TLS ----------------------------------
// !!! TLS uses a LOT OF MEMORY so be careful to enable other options at the same time !!!
//#define USE_MQTT_TLS // Use TLS for MQTT connection (+53k code, +15k mem)
#define USE_MQTT_TLS_CA_CERT
#define MQTT_TLS_CA_CERT_LENGTH 846 // Letsencrypt
#define MQTT_TLS_CA_CERT { \
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// -- KNX IP Protocol -----------------------------
//#define USE_KNX // Enable KNX IP Protocol Support (+9.4k code, +3k7 mem)
Expand Down Expand Up @@ -432,4 +506,8 @@
#error "Select either USE_MQTT_TLS or USE_WEBSERVER as there is just not enough memory to play with"
#endif

#if defined(USE_MQTT_TLS_CA_CERT) && defined(ARDUINO_ESP8266_RELEASE_2_3_0)
#error "USE_MQTT_TLS_CA_CERT does not work with core version 2.3.0""
#endif

#endif // _MY_USER_CONFIG_H_
10 changes: 10 additions & 0 deletions sonoff/xdrv_02_mqtt.ino
Original file line number Diff line number Diff line change
Expand Up @@ -467,6 +467,15 @@ boolean MqttCheckTls(void)
Settings.mqtt_host, Settings.mqtt_port, mqtt_retry_counter);
AddLog(LOG_LEVEL_DEBUG);
} else {
#ifdef USE_MQTT_TLS_CA_CERT
unsigned char tls_ca_cert[] = MQTT_TLS_CA_CERT;
if(EspClient.setCACert(tls_ca_cert, MQTT_TLS_CA_CERT_LENGTH)) {
if (EspClient.verifyCertChain(Settings.mqtt_host)) {
AddLog_P(LOG_LEVEL_INFO, S_LOG_MQTT, PSTR(D_VERIFIED "CA"));
result = true;
}
}
#else
if (EspClient.verify(fingerprint1, Settings.mqtt_host)) {
AddLog_P(LOG_LEVEL_INFO, S_LOG_MQTT, PSTR(D_VERIFIED "1"));
result = true;
Expand All @@ -475,6 +484,7 @@ boolean MqttCheckTls(void)
AddLog_P(LOG_LEVEL_INFO, S_LOG_MQTT, PSTR(D_VERIFIED "2"));
result = true;
}
#endif
}
if (!result) AddLog_P(LOG_LEVEL_INFO, S_LOG_MQTT, PSTR(D_FAILED));
EspClient.stop();
Expand Down