Python Encryption Tool (PBKDF2 + AES)

This is a GUI-based encryption tool built with Python and Tkinter. It uses AES (CBC mode) for encryption and PBKDF2 for key derivation, ensuring high security for both text and files.

Features

• Language Support: Switch between English and Chinese (中文) instantly.
• Text Encryption/Decryption: Securely encrypt messages with a custom signature (password).
• File Encryption/Decryption: Support for large files with progress tracking.
• Drag & Drop: Easily drag files into the application (requires tkinterdnd2).
• Security:
  • AES-256 (default), AES-192, AES-128 support.
  • PBKDF2-HMAC-SHA256 with 10,000 iterations for key derivation.
  • Random Salt and IV generated for every operation.
  • PKCS7 Padding.

Requirements

• Python 3.10+
• Dependencies listed in requirements.txt

Installation

1. Clone or download this repository.
2. Install dependencies:

   pip install -r requirements.txt

   Note: If tkinterdnd2 fails to install, the application will still work but without drag-and-drop functionality.

Usage

Run the application:

python main.py

1. Control Panel (Top)

• Signature: Enter your password/passphrase here. This is used to derive the encryption key.
• Confirm Sign: Optional visual confirmation to lock in your intent.
• Algorithm: Choose between AES-128, AES-192, or AES-256 (default).
• Language: Toggle between English and Chinese interface.
• Set Output Dir: Choose where encrypted/decrypted files should be saved by default.

2. Text Encryption (Left)

• Enter text in the bottom box.
• Click Encrypt.
• The result (Base64 encoded) appears in the top history log.

3. Text Decryption (Middle)

• Paste the Base64 encrypted string into the bottom box.
• Ensure the Signature matches the one used for encryption.
• Click Decrypt.
• The original text appears in the top history log.

4. File Operations (Right)

• Encrypt File:
  • Drag a file into the top box OR click "Select File".
  • Click Encrypt File.
  • The file will be saved with a .enc extension in the selected output directory (or same folder).
• Decrypt File:
  • Drag an encrypted file (.enc) into the bottom box.
  • Click Decrypt File.
  • The file will be decrypted with a .dec extension.

Technical Details

• Key Derivation:
  • Function: PBKDF2HMAC(SHA256)
  • Iterations: 10,000
  • Salt: 16 bytes (Randomly generated per encryption, stored in output)
• Encryption:
  • Algorithm: AES (CBC Mode)
  • IV: 16 bytes (Randomly generated per encryption, stored in output)
  • Padding: PKCS7 (128-bit block size)
• File Format:
  • [Salt (16 bytes)] [IV (16 bytes)] [Encrypted Data ...]

⚠️ 免责声明

本仓库包含的加密/解密程序仅为学习、研究和实验目的而提供。作者不保证其安全性、完整性或适用性，使用本程序所产生的一切风险及后果由使用者自行承担。

重要声明

1. 非专业用途 本程序仅为教学示例，不适用于保护真实场景中的敏感数据。其加密实现可能包含漏洞，无法达到工业级安全标准。
2. 禁止用于非法用途 使用者不得将本程序用于任何非法活动，包括但不限于侵犯隐私、破坏系统或违反当地法律法规的行为。作者对任何滥用行为概不负责。
3. 无担保责任 本程序按“原样”提供，作者明确不承担任何明示或暗示的担保责任，包括但不限于对适用性、特定功能或安全性的担保。使用本程序造成的任何直接或间接损失，作者不承担法律责任。
4. 自行承担风险 任何使用者应自行评估程序的安全性及合规性，并在必要时咨询安全专家或法律顾问。

建议

• 请勿使用本程序处理真实敏感数据。
• 欢迎提交问题或改进代码，但请勿要求作者提供安全审计或技术支持。
• 如发现安全漏洞，请通过 GitHub Issues 告知。