Initial Commit

- [+] feat: add initial project files
- [+] feat(.gitignore): add .gitignore file
- [+] feat(LICENSE): add BSD 3-Clause License
- [+] feat(README.md): add project documentation
- [+] feat(platformio.ini): add PlatformIO configuration file
- [+] feat(totp.ino): add main Arduino sketch for TOTP generation

.gitignore

@@ -0,0 +1,5 @@
+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch

LICENSE

@@ -0,0 +1,30 @@
+BSD 3-Clause License
+-----------
+
+Copyright (c) 2024, H0llyW00dzZ / H0llyW00dz
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+3. Neither the name of the copyright holder nor the names of its
+   contributors may be used to endorse or promote products derived from
+   this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

README.md

@@ -0,0 +1,38 @@
+# ESP8266 Arduino TOTP (Expermintal)
+
+> [!WARNING]  
+> This is experimental and might not work as expected.
+
+## Overview
+
+This project demonstrates how to implement a Time-based One-Time Password (TOTP) generator using an ESP8266 board with Arduino. The system connects to Wi-Fi, synchronizes time using an NTP client, and generates OTPs based on a shared secret.
+
+## Features
+
+- Connects to Wi-Fi and synchronizes with an NTP server.
+- Decodes a Base32 encoded secret for TOTP generation.
+- Generates and displays a TOTP every 30 seconds.
+
+## Usage
+
+1. **Configure Wi-Fi Credentials**:
+   - Open the sketch and replace `your_SSID` and `your_PASSWORD` with your Wi-Fi credentials.
+
+2. **Set Base32 Secret**:
+   - Replace `BASE32EncodedSecret` with your actual Base32 encoded secret.
+
+3. **Upload Code**:
+   - Connect your ESP8266 board to your computer.
+   - Select the correct board and port in the Arduino IDE.
+   - Upload the code to the board.
+
+4. **Monitor Output**:
+   - Open the Serial Monitor in Arduino IDE to view the generated OTPs.
+
+## License
+
+This project is licensed under the [BSD 3-Clause License](LICENSE).
+
+## Acknowledgments
+
+- Based on libraries and examples from the Arduino community.

platformio.ini

@@ -0,0 +1,20 @@
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:esp12e]
+platform = espressif8266
+board = esp12e
+framework = arduino
+lib_deps =
+  ESP8266WiFi
+  arduino-libraries/NTPClient
+  Hash
+  https://github.com/dirkx/Arduino-Base32-Decode
+  https://github.com/lucadentella/TOTP-Arduino

totp.ino

@@ -0,0 +1,60 @@
+// Copyright (c) 2024 H0llyW00dz All rights reserved.
+//
+// By accessing or using this software, you agree to be bound by the terms
+// of the License Agreement, which you can find at LICENSE files.
+//
+// Note: This is experimental IoT and might not work as expected.
+
+#include <ESP8266WiFi.h>
+#include <NTPClient.h>
+#include <WiFiUdp.h>
+#include <Hash.h>
+#include <TOTP.h>
+#include <Base32-Decode.h>
+
+// Wi-Fi credentials
+const char* ssid = "your_SSID";
+const char* password = "your_PASSWORD";
+
+// NTP client setup
+WiFiUDP ntpUDP;
+NTPClient timeClient(ntpUDP, "pool.ntp.org", 0, 60000);
+
+// Base32 encoded secret key for TOTP
+const char* base32Secret = "BASE32EncodedSecret"; // Replace with your Base32 encoded secret
+uint8_t decodedSecret[10]; // Adjust size based on your secret length
+
+void setup() {
+  Serial.begin(115200);
+  
+  // Connect to Wi-Fi
+  WiFi.begin(ssid, password);
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(1000);
+    Serial.println("Connecting to WiFi...");
+  }
+  Serial.println("Connected to WiFi");
+
+  // Initialize NTP client
+  timeClient.begin();
+
+  // Decode Base32 secret
+  int secretLength = base32decode((char*)base32Secret, decodedSecret, sizeof(decodedSecret));
+  if (secretLength <= 0) {
+    Serial.println("Error decoding Base32 secret");
+    while (true); // Halt execution
+  }
+}
+
+void loop() {
+  timeClient.update();
+  unsigned long epochTime = timeClient.getEpochTime();
+
+  // Generate TOTP
+  TOTP totp(decodedSecret, sizeof(decodedSecret));
+  String otp = totp.getCode(epochTime);
+  Serial.println("Current OTP: " + otp);
+
+  // Wait for 30 seconds before generating the next OTP
+  delay(30000);
+}