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Fixes failing https connections to HelloServerBearSSL#8206

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Merged
d-a-v merged 2 commits intoesp8266:masterfrommhightower83:pr-bearssl-alloc-iobuf
Jul 11, 2021
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58 changes: 29 additions & 29 deletionslibraries/ESP8266WiFi/src/WiFiClientSecureBearSSL.cpp
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Original file line numberDiff line numberDiff line change
Expand Up@@ -1083,6 +1083,17 @@ bool WiFiClientSecureCtx::_installClientX509Validator() {
return true;
}

std::shared_ptr<unsigned char> WiFiClientSecureCtx::_alloc_iobuf(size_t sz)
{ // Allocate buffer with preference to IRAM
HeapSelectIram primary;
auto sptr = std::shared_ptr<unsigned char>(new (std::nothrow) unsigned char[sz], std::default_delete<unsigned char[]>());
if (!sptr) {
HeapSelectDram alternate;
sptr = std::shared_ptr<unsigned char>(new (std::nothrow) unsigned char[sz], std::default_delete<unsigned char[]>());
}
return sptr;
}

// Called by connect() to do the actual SSL setup and handshake.
// Returns if the SSL handshake succeeded.
bool WiFiClientSecureCtx::_connectSSL(const char* hostName) {
Expand All@@ -1099,17 +1110,12 @@ bool WiFiClientSecureCtx::_connectSSL(const char* hostName) {

_sc = std::make_shared<br_ssl_client_context>();
_eng = &_sc->eng; // Allocation/deallocation taken care of by the _sc shared_ptr
//C This was borrowed from @earlephilhower PoC, to exemplify the use of IRAM.
//C Is this something we want to keep in the final release?
{ // ESP.setIramHeap(); would be an alternative to using a class to set a scope for IRAM usage.
HeapSelectIram ephemeral;
_iobuf_in = std::shared_ptr<unsigned char>(new (std::nothrow) unsigned char[_iobuf_in_size], std::default_delete<unsigned char[]>());
_iobuf_out = std::shared_ptr<unsigned char>(new (std::nothrow) unsigned char[_iobuf_out_size], std::default_delete<unsigned char[]>());
DBG_MMU_PRINTF("\n_iobuf_in: %p\n", _iobuf_in.get());
DBG_MMU_PRINTF( "_iobuf_out: %p\n", _iobuf_out.get());
DBG_MMU_PRINTF( "_iobuf_in_size: %u\n", _iobuf_in_size);
DBG_MMU_PRINTF( "_iobuf_out_size: %u\n", _iobuf_out_size);
} // ESP.resetHeap();
_iobuf_in = _alloc_iobuf(_iobuf_in_size);
_iobuf_out = _alloc_iobuf(_iobuf_out_size);
DBG_MMU_PRINTF("\n_iobuf_in: %p\n", _iobuf_in.get());
DBG_MMU_PRINTF( "_iobuf_out: %p\n", _iobuf_out.get());
DBG_MMU_PRINTF( "_iobuf_in_size: %u\n", _iobuf_in_size);
DBG_MMU_PRINTF( "_iobuf_out_size: %u\n", _iobuf_out_size);

if (!_sc || !_iobuf_in || !_iobuf_out) {
_freeSSL(); // Frees _sc, _iobuf*
Expand DownExpand Up@@ -1225,15 +1231,12 @@ bool WiFiClientSecureCtx::_connectSSLServerRSA(const X509List *chain,
_oom_err = false;
_sc_svr = std::make_shared<br_ssl_server_context>();
_eng = &_sc_svr->eng; // Allocation/deallocation taken care of by the _sc shared_ptr
{ // ESP.setIramHeap();
HeapSelectIram ephemeral;
_iobuf_in = std::shared_ptr<unsigned char>(new (std::nothrow) unsigned char[_iobuf_in_size], std::default_delete<unsigned char[]>());
_iobuf_out = std::shared_ptr<unsigned char>(new (std::nothrow) unsigned char[_iobuf_out_size], std::default_delete<unsigned char[]>());
DBG_MMU_PRINTF("\n_iobuf_in: %p\n", _iobuf_in.get());
DBG_MMU_PRINTF( "_iobuf_out: %p\n", _iobuf_out.get());
DBG_MMU_PRINTF( "_iobuf_in_size: %u\n", _iobuf_in_size);
DBG_MMU_PRINTF( "_iobuf_out_size: %u\n", _iobuf_out_size);
}// ESP.resetHeap();
_iobuf_in = _alloc_iobuf(_iobuf_in_size);
_iobuf_out = _alloc_iobuf(_iobuf_out_size);
DBG_MMU_PRINTF("\n_iobuf_in: %p\n", _iobuf_in.get());
DBG_MMU_PRINTF( "_iobuf_out: %p\n", _iobuf_out.get());
DBG_MMU_PRINTF( "_iobuf_in_size: %u\n", _iobuf_in_size);
DBG_MMU_PRINTF( "_iobuf_out_size: %u\n", _iobuf_out_size);

if (!_sc_svr || !_iobuf_in || !_iobuf_out) {
_freeSSL();
Expand DownExpand Up@@ -1272,15 +1275,12 @@ bool WiFiClientSecureCtx::_connectSSLServerEC(const X509List *chain,
_oom_err = false;
_sc_svr = std::make_shared<br_ssl_server_context>();
_eng = &_sc_svr->eng; // Allocation/deallocation taken care of by the _sc shared_ptr
{ // ESP.setIramHeap();
HeapSelectIram ephemeral;
_iobuf_in = std::shared_ptr<unsigned char>(new (std::nothrow) unsigned char[_iobuf_in_size], std::default_delete<unsigned char[]>());
_iobuf_out = std::shared_ptr<unsigned char>(new (std::nothrow) unsigned char[_iobuf_out_size], std::default_delete<unsigned char[]>());
DBG_MMU_PRINTF("\n_iobuf_in: %p\n", _iobuf_in.get());
DBG_MMU_PRINTF( "_iobuf_out: %p\n", _iobuf_out.get());
DBG_MMU_PRINTF( "_iobuf_in_size: %u\n", _iobuf_in_size);
DBG_MMU_PRINTF( "_iobuf_out_size: %u\n", _iobuf_out_size);
}// ESP.resetHeap();
_iobuf_in = _alloc_iobuf(_iobuf_in_size);
_iobuf_out = _alloc_iobuf(_iobuf_out_size);
DBG_MMU_PRINTF("\n_iobuf_in: %p\n", _iobuf_in.get());
DBG_MMU_PRINTF( "_iobuf_out: %p\n", _iobuf_out.get());
DBG_MMU_PRINTF( "_iobuf_in_size: %u\n", _iobuf_in_size);
DBG_MMU_PRINTF( "_iobuf_out_size: %u\n", _iobuf_out_size);

if (!_sc_svr || !_iobuf_in || !_iobuf_out) {
_freeSSL();
Expand Down
5 changes: 3 additions & 2 deletionslibraries/ESP8266WiFi/src/WiFiClientSecureBearSSL.h
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Original file line numberDiff line numberDiff line change
Expand Up@@ -189,6 +189,7 @@ class WiFiClientSecureCtx : public WiFiClient {
size_t _recvapp_len;

bool _clientConnected(); // Is the underlying socket alive?
std::shared_ptr<unsigned char> _alloc_iobuf(size_t sz);
void _freeSSL();
int _run_until(unsigned target, bool blocking = true);
size_t _write(const uint8_t *buf, size_t size, bool pmem);
Expand DownExpand Up@@ -309,8 +310,8 @@ class WiFiClientSecure : public WiFiClient {

// Limit the TLS versions BearSSL will connect with. Default is
// BR_TLS10...BR_TLS12. Allowed values are: BR_TLS10, BR_TLS11, BR_TLS12
bool setSSLVersion(uint32_t min = BR_TLS10, uint32_t max = BR_TLS12) { return _ctx->setSSLVersion(min, max); };
bool setSSLVersion(uint32_t min = BR_TLS10, uint32_t max = BR_TLS12) { return _ctx->setSSLVersion(min, max); };

// Check for Maximum Fragment Length support for given len before connection (possibly insecure)
static bool probeMaxFragmentLength(IPAddress ip, uint16_t port, uint16_t len);
static bool probeMaxFragmentLength(const char *hostname, uint16_t port, uint16_t len);
Expand Down
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