File Upload and Encryption API

Overview

This project provides a RESTful API for uploading files securely. The files are encrypted before being saved to the database, ensuring that sensitive information is protected. The API allows users to upload single or multiple files, retrieve files by email, and rename files as needed.

Features

• Creation of user.
• Log in
• Upload a single file with encryption.
• Upload multiple files with encryption.
• Retrieve decrypted files using the JWT token files by user email.
• Rename existing files.

Technologies Used

• Java
• Spring Boot
• JPA (Java Persistence API)
• Hibernate
• MultipartFile for file uploads

Models

File Model

Attribute	Type	Column Name	Description
id	Long	id	Primary key; auto-generated ID
fileName	String	file_name	Name of the file
fileData	byte[]	file_data	Binary data of the file, stored as LONGBLOB
email	String	email	Email associated with the file

User Model

Here's an updated README to reflect that the User class implements UserDetails:

Attribute	Type	Column Name	Description
id	Long	id	Primary key; identity generation strategy
email	String	email	User's email, must not be null
password	String	password	User's password, must not be null

Class Details

• Implements: UserDetails — Allows integration with Spring Security, making the User class suitable for user authentication and authorization.

API Endpoints

1. Sign up

• Endpoint: /api/v1/user/create

Request Body

{
  "email": "[email protected]",
  "password": "userPassword"
}

Response:

{
  "status": 200,
  "message": "user created",
  "data": "[email protected]"
}

2. Login

• Endpoint: /api/v1/auth/login

Request Body

{
  "email": "[email protected]",
  "password": "userPassword"
}

Response:

{
  "status": 200,
  "message": "logged in successfully",
  "data": TOKEN
}

3. Upload a Single File

Endpoint: POST /api/v1/file/upload

Request Body:

file: MultipartFile (the file to upload)

Response:

{
  "status": 200,
  "message": "file saved",
  "data": "original_filename.enc"
}

4. Upload Multiple Files

Endpoint: POST /api/v1/file/upload-multiple

Request Body:

email: String (user's email)
files: List<MultipartFile> (the files to upload)

Response:

{
  "status": 200,
  "message": "Files saved successfully",
  "data": ["original_filename1.enc", "original_filename2.enc"]
}

5. Get Files by Email

Endpoint: GET /api/v1/file/user-files

Request Parameters:

email: String (user's email)

Response:

{
  "status": 200,
  "message": "Filenames retrieved successfully.",
  "data": ["file1.enc", "file2.enc"]
}

6. Rename a File

Endpoint: PUT /api/v1/file/update-fileName/{id}

Request Body:

fileName: String (new name for the file)

Response:

{
  "status": 200,
  "message": "File name Updated!!!"
}

File Encryption

Files uploaded through this API are encrypted using a custom encryption method. The encryption logic is applied to the file's input stream before saving it to the database, ensuring that the file contents remain confidential.

Installation and Setup

1. Clone the repository:

   git clone <repository-url>

2. Navigate to the project directory:

   cd <project-directory>

3. Build the project:

   mvn clean install

4. Run the application:

   mvn spring-boot:run

5. The API will be available at http://localhost:1001/api/v1.