def message_decrypt():
    decrypted_lines = ""
    with open('sandbox_sender/desPassword.txt', 'r') as des_password_gotcha:
        des_pwd = des_pwd_decrypt()
    # 读取加密的消息（十六进制格式）
    with open('sent/encrypted_msg.txt', 'r') as encrypted_file:
        encrypted_lines = encrypted_file.read()

    # 将十六进制字符串转换为二进制数据
    encrypted_data = binascii.unhexlify(encrypted_lines)

    # 创建 DES 解密器
    des_cipher = DES.new(des_pwd, DES.MODE_ECB)  # 使用 ECB 模式

    # 解密文本
    decrypted_message = des_cipher.decrypt(encrypted_data).decode()

    # 移除 PKCS#7 填充
    padding_length = ord(decrypted_message[-1])  # 填充长度是最后一个字符的 ASCII 值
    decrypted_message = decrypted_message[:-padding_length]  # 去除填充

    # 打印解密后的消息
    print("Decrypted Message:")
    print(decrypted_message)

    # 可选择将解密后的消息保存到文件
    with open('inbox/decrypted_msg.txt', 'w') as decrypted_file:
        decrypted_file.write(decrypted_message)
        print("Decrypted message saved to 'decrypted_msg.txt'.")