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TLS dual mode

This commit is contained in:
Stephan Hadinger 2021-10-09 09:49:00 +02:00
parent 89751c4d86
commit 1a96a39d3a
2 changed files with 26 additions and 20 deletions
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42
lib/lib_ssl/tls_mini/src/WiFiClientSecureLightBearSSL.cpp
View File

@ -191,6 +191,11 @@ void WiFiClientSecure_light::_clear() {
_last_error = 0;
_recvapp_buf = nullptr;
_recvapp_len = 0;
#ifdef USE_MQTT_TLS_CA_CERT
_insecure = false; // insecure (fingerprint) mode is only enabled if setPubKeyFingerprint() is called
#else
_insecure = true; // force insecure if CA validation is not enabled
#endif
_fingerprint_any = true; // by default accept all fingerprints
_fingerprint1 = nullptr;
_fingerprint2 = nullptr;
@ -954,10 +959,9 @@ extern "C" {
bool WiFiClientSecure_light::_connectSSL(const char* hostName) {
// Validation context, either full CA validation or checking only fingerprints
#ifdef USE_MQTT_TLS_CA_CERT
br_x509_minimal_context *x509_minimal;
#else
br_x509_pubkeyfingerprint_context *x509_insecure;
br_x509_minimal_context *x509_minimal = nullptr;
#endif
br_x509_pubkeyfingerprint_context *x509_insecure = nullptr;
LOG_HEAP_SIZE("_connectSSL.start");
@ -984,24 +988,26 @@ bool WiFiClientSecure_light::_connectSSL(const char* hostName) {
// Allocatte and initialize Decoder Context
LOG_HEAP_SIZE("_connectSSL before DecoderContext allocation");
// Only failure possible in the installation is OOM
#ifdef USE_MQTT_TLS_CA_CERT
x509_minimal = (br_x509_minimal_context*) malloc(sizeof(br_x509_minimal_context));
if (!x509_minimal) break;
br_x509_minimal_init(x509_minimal, &br_sha256_vtable, _ta_P, _ta_size);
br_x509_minimal_set_rsa(x509_minimal, br_ssl_engine_get_rsavrfy(_eng));
br_x509_minimal_set_hash(x509_minimal, br_sha256_ID, &br_sha256_vtable);
br_ssl_engine_set_x509(_eng, &x509_minimal->vtable);
uint32_t now = UtcTime();
uint32_t cfg_time = CfgTime();
if (cfg_time > now) { now = cfg_time; }
br_x509_minimal_set_time(x509_minimal, now / 86400 + 719528, now % 86400);
#else
x509_insecure = (br_x509_pubkeyfingerprint_context*) malloc(sizeof(br_x509_pubkeyfingerprint_context));
//x509_insecure = std::unique_ptr<br_x509_pubkeyfingerprint_context>(new br_x509_pubkeyfingerprint_context);
if (!x509_insecure) break;
br_x509_pubkeyfingerprint_init(x509_insecure, _fingerprint1, _fingerprint2, _recv_fingerprint, _fingerprint_any);
br_ssl_engine_set_x509(_eng, &x509_insecure->vtable);
#ifdef USE_MQTT_TLS_CA_CERT
if (!_insecure) {
x509_minimal = (br_x509_minimal_context*) malloc(sizeof(br_x509_minimal_context));
if (!x509_minimal) break;
br_x509_minimal_init(x509_minimal, &br_sha256_vtable, _ta_P, _ta_size);
br_x509_minimal_set_rsa(x509_minimal, br_ssl_engine_get_rsavrfy(_eng));
br_x509_minimal_set_hash(x509_minimal, br_sha256_ID, &br_sha256_vtable);
br_ssl_engine_set_x509(_eng, &x509_minimal->vtable);
uint32_t now = UtcTime();
uint32_t cfg_time = CfgTime();
if (cfg_time > now) { now = cfg_time; }
br_x509_minimal_set_time(x509_minimal, now / 86400 + 719528, now % 86400);
}
#endif
LOG_HEAP_SIZE("_connectSSL after DecoderContext allocation");
@ -1043,9 +1049,8 @@ bool WiFiClientSecure_light::_connectSSL(const char* hostName) {
#ifdef USE_MQTT_TLS_CA_CERT
free(x509_minimal);
#else
free(x509_insecure);
#endif
free(x509_insecure);
LOG_HEAP_SIZE("_connectSSL after release of Priv Key");
return ret;
} while (0);
@ -1059,9 +1064,8 @@ bool WiFiClientSecure_light::_connectSSL(const char* hostName) {
#endif
#ifdef USE_MQTT_TLS_CA_CERT
free(x509_minimal);
#else
free(x509_insecure);
#endif
free(x509_insecure);
LOG_HEAP_SIZE("_connectSSL clean_on_error");
return false;
}

4
lib/lib_ssl/tls_mini/src/WiFiClientSecureLightBearSSL.h
View File

@ -82,6 +82,7 @@ class WiFiClientSecure_light : public WiFiClient {
_fingerprint1 = f1;
_fingerprint2 = f2;
_fingerprint_any = f_any;
_insecure = true;
}
const uint8_t * getRecvPubKeyFingerprint(void) {
return _recv_fingerprint;
@ -132,7 +133,8 @@ class WiFiClientSecure_light : public WiFiClient {
bool _handshake_done;
uint64_t _last_error;
bool _fingerprint_any; // accept all fingerprints
bool _fingerprint_any; // accept all fingerprints
bool _insecure; // force fingerprint
const uint8_t *_fingerprint1; // fingerprint1 to be checked against
const uint8_t *_fingerprint2; // fingerprint2 to be checked against
// **** Start patch Castellucci