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Add support X.509 client certificates for MQTT. (#5778)

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Co-authored-by: h2zero <powellperalata@gmail.com>
Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
This commit is contained in:
h2zero 2024-01-17 16:26:56 -07:00 committed by GitHub
parent b606e976e1
commit e731a2ffaa
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5 changed files with 29 additions and 0 deletions
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11
esphome/components/mqtt/__init__.py
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@ -10,6 +10,8 @@ from esphome.const import (
CONF_BIRTH_MESSAGE,
CONF_BROKER,
CONF_CERTIFICATE_AUTHORITY,
CONF_CLIENT_CERTIFICATE,
CONF_CLIENT_CERTIFICATE_KEY,
CONF_CLIENT_ID,
CONF_COMMAND_TOPIC,
CONF_COMMAND_RETAIN,
@ -199,6 +201,12 @@ CONFIG_SCHEMA = cv.All(
cv.Optional(CONF_CERTIFICATE_AUTHORITY): cv.All(
cv.string, cv.only_with_esp_idf
),
cv.Inclusive(CONF_CLIENT_CERTIFICATE, "cert-key-pair"): cv.All(
cv.string, cv.only_on_esp32
),
cv.Inclusive(CONF_CLIENT_CERTIFICATE_KEY, "cert-key-pair"): cv.All(
cv.string, cv.only_on_esp32
),
cv.SplitDefault(CONF_SKIP_CERT_CN_CHECK, esp32_idf=False): cv.All(
cv.boolean, cv.only_with_esp_idf
),
@ -378,6 +386,9 @@ async def to_code(config):
if CONF_CERTIFICATE_AUTHORITY in config:
cg.add(var.set_ca_certificate(config[CONF_CERTIFICATE_AUTHORITY]))
cg.add(var.set_skip_cert_cn_check(config[CONF_SKIP_CERT_CN_CHECK]))
if CONF_CLIENT_CERTIFICATE in config:
cg.add(var.set_cl_certificate(config[CONF_CLIENT_CERTIFICATE]))
cg.add(var.set_cl_key(config[CONF_CLIENT_CERTIFICATE_KEY]))
# prevent error -0x428e
# See https://github.com/espressif/esp-idf/issues/139

10
esphome/components/mqtt/mqtt_backend_esp32.cpp
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@ -45,6 +45,11 @@ bool MQTTBackendESP32::initialize_() {
mqtt_cfg_.cert_pem = ca_certificate_.value().c_str();
mqtt_cfg_.skip_cert_common_name_check = skip_cert_cn_check_;
mqtt_cfg_.transport = MQTT_TRANSPORT_OVER_SSL;
if (this->cl_certificate_.has_value() && this->cl_key_.has_value()) {
mqtt_cfg_.client_cert_pem = this->cl_certificate_.value().c_str();
mqtt_cfg_.client_key_pem = this->cl_key_.value().c_str();
}
} else {
mqtt_cfg_.transport = MQTT_TRANSPORT_OVER_TCP;
}
@ -79,6 +84,11 @@ bool MQTTBackendESP32::initialize_() {
mqtt_cfg_.broker.verification.certificate = ca_certificate_.value().c_str();
mqtt_cfg_.broker.verification.skip_cert_common_name_check = skip_cert_cn_check_;
mqtt_cfg_.broker.address.transport = MQTT_TRANSPORT_OVER_SSL;
if (this->cl_certificate_.has_value() && this->cl_key_.has_value()) {
mqtt_cfg_.credentials.authentication.certificate = this->cl_certificate_.value().c_str();
mqtt_cfg_.credentials.authentication.key = this->cl_key_.value().c_str();
}
} else {
mqtt_cfg_.broker.address.transport = MQTT_TRANSPORT_OVER_TCP;
}

4
esphome/components/mqtt/mqtt_backend_esp32.h
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@ -124,6 +124,8 @@ class MQTTBackendESP32 final : public MQTTBackend {
void loop() final;
void set_ca_certificate(const std::string &cert) { ca_certificate_ = cert; }
void set_cl_certificate(const std::string &cert) { cl_certificate_ = cert; }
void set_cl_key(const std::string &key) { cl_key_ = key; }
void set_skip_cert_cn_check(bool skip_check) { skip_cert_cn_check_ = skip_check; }
protected:
@ -154,6 +156,8 @@ class MQTTBackendESP32 final : public MQTTBackend {
uint16_t keep_alive_;
bool clean_session_;
optional<std::string> ca_certificate_;
optional<std::string> cl_certificate_;
optional<std::string> cl_key_;
bool skip_cert_cn_check_{false};
// callbacks

2
esphome/components/mqtt/mqtt_client.h
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@ -146,6 +146,8 @@ class MQTTClientComponent : public Component {
#endif
#ifdef USE_ESP32
void set_ca_certificate(const char *cert) { this->mqtt_backend_.set_ca_certificate(cert); }
void set_cl_certificate(const char *cert) { this->mqtt_backend_.set_cl_certificate(cert); }
void set_cl_key(const char *key) { this->mqtt_backend_.set_cl_key(key); }
void set_skip_cert_cn_check(bool skip_check) { this->mqtt_backend_.set_skip_cert_cn_check(skip_check); }
#endif
const Availability &get_availability();

2
esphome/const.py
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@ -112,6 +112,8 @@ CONF_CHANNELS = "channels"
CONF_CHARACTERISTIC_UUID = "characteristic_uuid"
CONF_CHIPSET = "chipset"
CONF_CLEAR_IMPEDANCE = "clear_impedance"
CONF_CLIENT_CERTIFICATE = "client_certificate"
CONF_CLIENT_CERTIFICATE_KEY = "client_certificate_key"
CONF_CLIENT_ID = "client_id"
CONF_CLK_PIN = "clk_pin"
CONF_CLOCK_PIN = "clock_pin"