Fix possible null pointer exception error.

library.json

@@ -1,6 +1,6 @@
 {
   "name": "ESP_SSLClient",
-  "version": "2.0.3",
+  "version": "2.0.4",
   "keywords": "communication, REST, esp32, esp8266, arduino",
   "description": "This library provided the Secure Layer Networking (SSL/TLS) TCP Client for ESP8266, ESP32 and Raspberry Pi RP2040, Teensy, SAMD, AVR and other Arduino devices that support external networking interfaces e.g., WiFiClient, EthernetClient and GSMClient.",
   "repository": {

library.properties

@@ -1,6 +1,6 @@
 name=ESP_SSLClient
 
-version=2.0.3
+version=2.0.4
 
 author=Mobizt
 

src/ESP_SSLClient.h

@@ -1,8 +1,8 @@
 /**
  *
- * The ESP SSL Client Class, ESP_SSLClient.h v2.0.3
+ * The ESP SSL Client Class, ESP_SSLClient.h v2.0.4
  *
- * Created August 3, 2023
+ * Created August 4, 2023
  *
  * The MIT License (MIT)
  * Copyright (c) 2023 K. Suwatchai (Mobizt)

src/client/BSSL_SSL_Client.cpp

@@ -1,7 +1,7 @@
 /**
- * BSSL_SSL_Client library v1.0.1 for Arduino devices.
+ * BSSL_SSL_Client library v1.0.2 for Arduino devices.
  *
- * Created August 3, 2003
+ * Created August 4, 2003
  *
  * This work contains codes based on WiFiClientSecure from Earle F. Philhower and SSLClient from OSU OPEnS Lab.
  *
@@ -231,6 +231,9 @@ int BSSL_SSL_Client::read()
 
 int BSSL_SSL_Client::read(uint8_t *buf, size_t size)
 {
+    if (!_basic_client)
+        return 0;
+
     if (!_secure)
         return _basic_client->read(buf, size);
 
@@ -250,6 +253,9 @@ int BSSL_SSL_Client::read(uint8_t *buf, size_t size)
 
 size_t BSSL_SSL_Client::write(const uint8_t *buf, size_t size)
 {
+    if (!_basic_client)
+        return 0;
+
     if (!_secure)
         return _basic_client->write(buf, size);
 
@@ -367,6 +373,26 @@ int BSSL_SSL_Client::peek()
     return -1;
 }
 
+size_t BSSL_SSL_Client::peekBytes(uint8_t *buffer, size_t length)
+{
+    if (!_basic_client || !_secure)
+        return 0;
+
+    size_t to_copy = 0;
+    if (!_sc)
+        return 0;
+
+    unsigned long _startMillis = millis();
+    while ((available() < (int)length) && ((millis() - _startMillis) < 5000))
+    {
+        yield();
+    }
+
+    to_copy = _recvapp_len < length ? _recvapp_len : length;
+    memcpy(buffer, _recvapp_buf, to_copy);
+    return to_copy;
+}
+
 // Don't validate the chain, just accept whatever is given.  VERY INSECURE!
 void BSSL_SSL_Client::setInsecure()
 {
@@ -442,7 +468,7 @@ void BSSL_SSL_Client::setHandshakeTimeout(unsigned int timeoutMs) { _handshake_t
 
 void BSSL_SSL_Client::flush()
 {
-    if (!_secure)
+    if (!_secure && _basic_client)
     {
         _basic_client->flush();
         return;
@@ -509,6 +535,8 @@ int BSSL_SSL_Client::availableForWrite()
     return 0;
 }
 
+void BSSL_SSL_Client::setSession(BearSSL_Session *session) { _session = session; };
+
 // Assume a given public key, don't validate or use cert info at all
 void BSSL_SSL_Client::setKnownKey(const PublicKey *pk, unsigned usages)
 {
@@ -966,6 +994,11 @@ bool BSSL_SSL_Client::probeMaxFragmentLength(const String &host, uint16_t port,
     return BSSL_SSL_Client::probeMaxFragmentLength(host.c_str(), port, len);
 }
 
+size_t BSSL_SSL_Client::peekAvailable()
+{
+    return available();
+}
+
 // return a pointer to available data buffer (size = peekAvailable())
 // semantic forbids any kind of read() before calling peekConsume()
 const char *BSSL_SSL_Client::peekBuffer()
@@ -1585,9 +1618,10 @@ int BSSL_SSL_Client::mRunUntil(const unsigned target, unsigned long timeout)
             br_ssl_engine_recvrec_buf(_eng, &len);
             if (lastLen != len)
             {
+                lastLen = len;
 #if defined(ESP_SSLCLIENT_ENABLE_DEBUG)
                 String s = PSTR("Expected bytes count: ");
-                s += lastLen = len;
+                s += len;
                 esp_ssl_debug_print(s.c_str(), _debug_level, esp_ssl_debug_info, __func__);
 #endif
             }
@@ -2018,7 +2052,7 @@ bool BSSL_SSL_Client::mInstallClientX509Validator()
 #endif
         bssl::br_x509_minimal_install_hashes(_x509_minimal.get());
 
-#if (defined(ESP32) || defined(ESP8266) || defined(ARDUINO_ARCH_RP2040)) && !defined(ARDUINO_NANO_RP2040_CONNECT) 
+#if (defined(ESP32) || defined(ESP8266) || defined(ARDUINO_ARCH_RP2040)) && !defined(ARDUINO_NANO_RP2040_CONNECT)
         if (_now < ESP_SSLCLIENT_VALID_TIMESTAMP)
             _now = time(nullptr);
 #endif

src/client/BSSL_SSL_Client.h

@@ -1,7 +1,7 @@
 /**
- * BSSL_SSL_Client library v1.0.1 for Arduino devices.
+ * BSSL_SSL_Client library v1.0.2 for Arduino devices.
  *
- * Created August 3, 2003
+ * Created August 4, 2003
  *
  * This work contains codes based on WiFiClientSecure from Earle F. Philhower and SSLClient from OSU OPEnS Lab.
  *
@@ -119,6 +119,8 @@ class BSSL_SSL_Client : public Client
 
     int peek() override;
 
+    size_t peekBytes(uint8_t *buffer, size_t length);
+
     void setInsecure();
 
     void enableSSL(bool enable);
@@ -141,6 +143,8 @@ class BSSL_SSL_Client : public Client
 
     int availableForWrite();
 
+    void setSession(BearSSL_Session *session);
+
     void setKnownKey(const PublicKey *pk, unsigned usages = BR_KEYTYPE_KEYX | BR_KEYTYPE_SIGN);
 
     bool setFingerprint(const uint8_t fingerprint[20]);
@@ -177,6 +181,8 @@ class BSSL_SSL_Client : public Client
 
     bool probeMaxFragmentLength(const String &host, uint16_t port, uint16_t len);
 
+    size_t peekAvailable();
+
     const char *peekBuffer();
 
     void peekConsume(size_t consume);

src/client/BSSL_TCP_Client.cpp

@@ -1,7 +1,7 @@
 /**
- * BSSL_TCP_Client v2.0.3 for Arduino devices.
+ * BSSL_TCP_Client v2.0.4 for Arduino devices.
  *
- * Created August 3, 2023
+ * Created August 4, 2023
  *
  * The MIT License (MIT)
  * Copyright (c) 2023 K. Suwatchai (Mobizt)
@@ -299,6 +299,8 @@ void BSSL_TCP_Client::setBufferSizes(int recv, int xmit)
 
 int BSSL_TCP_Client::availableForWrite() { return _ssl_client.availableForWrite(); };
 
+void BSSL_TCP_Client::setSession(BearSSL_Session *session) {_ssl_client.setSession(session);};
+
 void BSSL_TCP_Client::setKnownKey(const PublicKey *pk, unsigned usages)
 {
     _ssl_client.setKnownKey(pk, usages);
@@ -383,7 +385,7 @@ bool BSSL_TCP_Client::probeMaxFragmentLength(const String &host, uint16_t port,
 bool BSSL_TCP_Client::hasPeekBufferAPI() const { return true; }
 
 // return number of byte accessible by peekBuffer()
-size_t BSSL_TCP_Client::peekAvailable() { return _ssl_client.available(); }
+size_t BSSL_TCP_Client::peekAvailable() { return _ssl_client.peekAvailable(); }
 
 // return a pointer to available data buffer (size = peekAvailable())
 // semantic forbids any kind of read() before calling peekConsume()

src/client/BSSL_TCP_Client.h

@@ -1,7 +1,7 @@
 /**
- * BSSL_TCP_Client v2.0.3 for Arduino devices.
+ * BSSL_TCP_Client v2.0.4 for Arduino devices.
  *
- * Created August 3, 2023
+ * Created August 4, 2023
  *
  * The MIT License (MIT)
  * Copyright (c) 2023 K. Suwatchai (Mobizt)
@@ -307,7 +307,7 @@ class BSSL_TCP_Client : public Client
 
     int availableForWrite();
 
-    // void setSession(BearSSL_Session *session) {};
+    void setSession(BearSSL_Session *session);
 
     void setKnownKey(const PublicKey *pk, unsigned usages = BR_KEYTYPE_KEYX | BR_KEYTYPE_SIGN);