Arduino 3 fixes (#48)

Author: swoboda1337

src/WebAuthentication.cpp

@@ -70,10 +70,17 @@ static bool getMD5(uint8_t * data, uint16_t len, char * output){//33 bytes or mo
     return false;
   memset(_buf, 0x00, 16);
 #ifdef ESP32
+#if ESP_ARDUINO_VERSION >= ESP_ARDUINO_VERSION_VAL(3, 0, 0)
+  mbedtls_md5_init(&_ctx);
+  mbedtls_md5_starts(&_ctx);
+  mbedtls_md5_update(&_ctx, data, len);
+  mbedtls_md5_finish(&_ctx, _buf);
+#else
   mbedtls_md5_init(&_ctx);
   mbedtls_md5_starts_ret(&_ctx);
   mbedtls_md5_update_ret(&_ctx, data, len);
   mbedtls_md5_finish_ret(&_ctx, _buf);
+#endif
 #else
   MD5Init(&_ctx);
   MD5Update(&_ctx, data, len);