# cloudDriveV2.0

**Repository Path**: calmsy/cloud-drive-v2.0

## Basic Information

- **Project Name**: cloudDriveV2.0
- **Description**: nothing to do!
- **Primary Language**: C
- **License**: MIT
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2025-10-19
- **Last Updated**: 2025-10-24

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# cloudDriveV2.0

#### Description
Hi,Guys, Very Happy Understanding Everyone,it's my honour.Now let's give it our best shot!

## Software Architecture

### 1. Client

- **Login System**

  1. **Registration**

     - Check that the username is not NULL

       ```c
       char user_name[20] = "NULL";
       if(user_name != "NULL")
       ```

     - Username

     - Obtain salt, generate ciphertext

     - Store in a text file with the format: `username:salt`

       ```c
       user_name:$zkxfjiaeqw$
       ```

     - Send to the server

  2. **Login**

     - Enter username

     - Enter plaintext password, generate ciphertext using salt

     - Send username and ciphertext to the server in the format:

       ```c
       user_name:cryptograph
       ```

  3. **Account Deactivation**

     - Send `username:ciphertext` to the server

  4. **Logout**

     - Send a logout tag to exit the user session

- **Resume from Breakpoint**

- **Upload/Download**

- **Command Parsing**

- **TLV (Tag-Length-Value)**

### 2. Server

- **Protocol**

- **String Parsing**

- **Authentication System**

  1. **Registration**

     - Generate salt for the username
     - Return the salt to the client
     - Receive and store the ciphertext
     - Save user data to MySQL
     - Return registration success/failure

  2. **Login**

     - Receive user information and parse the string

       ```c
       Username
       Ciphertext
       ```

     - Check if the username exists in MySQL:

       1. **Exists**:
          - Verify password:
            1. **Correct**: Return login success
            2. **Incorrect**: Return password error
       2. **Does not exist**:
          - Return username does not exist

     - Return success or failure

  3. **Account Deactivation**

     - Check if the provided data matches the MySQL record:
       1. **Match**:
          - Update status from 0 to 1
          - Return deactivation success
       2. **Mismatch**:
          - Return deactivation failure

  4. **Exit**

     - Receive exit signal
     - Exit the loop
     - Return `fucking fucked`

- **Framework**

  1. **Directory Handling**
     - All users are under the same root directory
     - Usernames are stored as hash values

  2. **Thread Pool**

  3. **Parsing**
     - Basic commands
     - Login
     - Registration
     - Account deactivation
     - Exit
     - Upload
     - Download

  4. **Response**

  5. **Resume from Breakpoint**

- **Logging**

- **Database**

  ```c
  mysqldump -u [username] -p[password] [database_name] > [output_filename].sql
  ```

[Note]: After creating the database, be sure to use the above command to export the table creation operations for backup.

1. **User Table**
   - Table Columns [User Table]:
     1. id_auto (Primary Key)
     2. user_name (Unique Key)
     3. salt
     4. crypt
     5. is_del
2. **Virtual File Table**
   - Table Columns [File System Table]:
     1. id_auto (Primary Key)
     2. file_name
     3. user_name (Unique Key)
     4. parent_id
     5. file_virtual_path (Unique Key)
     6. type
     7. md5
3. **Table Structure**
   - Tree structure

- **TLV (Tag-Length-Value)**

### 3. Business Logic

- **Resume from Breakpoint**
- **Basic Commands**
  1. ls
  2. cd
  3. pwd
  4. mkdir
  5. rmdir
  6. insert_into
  7. update
- **File Transfer**
  1. Upload/Download
  2. Resume from Breakpoint

### 4. Logging

## Installation

1.  Run "./cmake_make"

## Instructions

1.  This is merely rubbish.
1.  It might be useful to you, but I'm sure that most of it is of no use to you.

## Contribution

1.  Have a great time!