File Encryption and Decryption

Overview

This project implements a file encryption and decryption system using parallel processing techniques in C++. The application can encrypt or decrypt all files in a specified directory using efficient cryptographic algorithms and parallel processing for improved performance.

Features

• File Processing: Encrypt or decrypt entire directories of files
• Parallel Processing: Utilizes parallel processing for handling multiple files efficiently
• Cross-Platform: Works on Windows, Linux, and macOS
• Modular Design: Clean separation of concerns with dedicated modules for:
  • Encryption/Decryption operations
  • File I/O handling
  • Process management
  • Environment configuration

Project Structure

├── main.cpp                           # Main application entry point
├── Makefile                          # Build configuration for Unix-like systems
├── build.bat                         # Windows batch build script
├── build.ps1                         # PowerShell build script
├── src/
│   └── app/
│       ├── encryptDecrypt/
│       │   ├── Cryption.cpp          # Encryption/decryption implementation
│       │   ├── Cryption.hpp          # Encryption/decryption headers
│       │   └── CryptionMain.cpp      # Standalone cryption utility
│       ├── fileHandling/
│       │   ├── IO.cpp                # File input/output operations
│       │   ├── IO.hpp                # File I/O headers
│       │   ├── ReadEnv.cpp           # Environment configuration reader
│       │   └── ReadEnv.hpp           # Environment headers
│       └── processes/
│           ├── ProcessManagement.cpp  # Process and task management
│           ├── ProcessManagement.hpp  # Process management headers
│           └── Task.hpp              # Task definition structures
└── test/
    ├── test1.txt                     # Sample test files
    └── test2.txt

Prerequisites

• C++ Compiler: g++ with C++17 support
• Build Tools:
  • Linux/macOS: make (usually pre-installed)
  • Windows: Either install make via MinGW/MSYS2 or use provided batch scripts

Getting Started

Method 1: Using Make (Linux/macOS/Windows with make installed)

# Clone the repository
git clone https://github.com/mridulr2003/File-Encryption-Decryption.git
cd File-Encryption-Decryption

# Build the project
make

# Run the application
./encrypt_decrypt        # Linux/macOS
# or
encrypt_decrypt.exe      # Windows

Method 2: Using Windows Build Scripts

# Clone the repository
git clone https://github.com/mridulr2003/File-Encryption-Decryption.git
cd File-Encryption-Decryption

# Build using batch script
build.bat

# Or build using PowerShell script
# build.ps1

# Run the application
encrypt_decrypt.exe

Method 3: Manual Compilation

If you prefer to compile manually or troubleshoot build issues:

# Compile source files
g++ -std=c++17 -g -Wall -I. -Isrc/app/encryptDecrypt -Isrc/app/fileHandling -Isrc/app/processes -c main.cpp -o main.o
g++ -std=c++17 -g -Wall -I. -Isrc/app/encryptDecrypt -Isrc/app/fileHandling -Isrc/app/processes -c src/app/processes/ProcessManagement.cpp -o src/app/processes/ProcessManagement.o
g++ -std=c++17 -g -Wall -I. -Isrc/app/encryptDecrypt -Isrc/app/fileHandling -Isrc/app/processes -c src/app/fileHandling/IO.cpp -o src/app/fileHandling/IO.o
g++ -std=c++17 -g -Wall -I. -Isrc/app/encryptDecrypt -Isrc/app/fileHandling -Isrc/app/processes -c src/app/fileHandling/ReadEnv.cpp -o src/app/fileHandling/ReadEnv.o
g++ -std=c++17 -g -Wall -I. -Isrc/app/encryptDecrypt -Isrc/app/fileHandling -Isrc/app/processes -c src/app/encryptDecrypt/Cryption.cpp -o src/app/encryptDecrypt/Cryption.o

# Link executable
g++ -std=c++17 -g -Wall main.o src/app/processes/ProcessManagement.o src/app/fileHandling/IO.o src/app/fileHandling/ReadEnv.o src/app/encryptDecrypt/Cryption.o -o encrypt_decrypt

Usage

1. Run the application:

   ./encrypt_decrypt        # Linux/macOS
   encrypt_decrypt.exe      # Windows

2. Enter directory path:

   • Provide the full path to the directory containing files you want to encrypt/decrypt
   • Example: C:\Users\YourName\Documents\TestFiles (Windows)
   • Example: /home/username/testfiles (Linux)

3. Choose action:

   • Type encrypt to encrypt all files in the directory
   • Type decrypt to decrypt all files in the directory

4. Processing:

   • The application will process all files in parallel
   • Encrypted/decrypted files will be saved with appropriate modifications
   • Progress and status information will be displayed

Clean Build

To clean build artifacts:

# Using make
make clean

# Manual cleanup (Windows)
del *.o src\app\encryptDecrypt\*.o src\app\fileHandling\*.o src\app\processes\*.o encrypt_decrypt.exe

# Manual cleanup (Linux/macOS)
rm -f *.o src/app/encryptDecrypt/*.o src/app/fileHandling/*.o src/app/processes/*.o encrypt_decrypt