Encryption/Decryption of Audio Files Gaming Project in C++

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8 months ago

#include <iostream>
#include <fstream>
#include <vector>

using namespace std;

// Function to encrypt or decrypt data using XOR cipher
void xorCipher(vector<unsigned char>& data, unsigned char key) {
    for (auto& byte : data) {
        byte ^= key;
    }
}

// Function to read a binary file into a vector
vector<unsigned char> readFile(const string& filename) {
    ifstream file(filename, ios::binary | ios::ate);
    if (!file) {
        cerr << "Error opening file: " << filename << endl;
        exit(1);
    }
    
    streamsize size = file.tellg();
    file.seekg(0, ios::beg);

    vector<unsigned char> buffer(size);
    if (!file.read(reinterpret_cast<char*>(buffer.data()), size)) {
        cerr << "Error reading file: " << filename << endl;
        exit(1);
    }

    return buffer;
}

// Function to write a vector to a binary file
void writeFile(const string& filename, const vector<unsigned char>& data) {
    ofstream file(filename, ios::binary);
    if (!file) {
        cerr << "Error opening file: " << filename << endl;
        exit(1);
    }

    file.write(reinterpret_cast<const char*>(data.data()), data.size());
}

int main() {
    string inputFilename, outputFilename;
    unsigned char key;

    cout << "Enter the input file name: ";
    cin >> inputFilename;
    cout << "Enter the output file name: ";
    cin >> outputFilename;
    cout << "Enter the encryption/decryption key (0-255): ";
    cin >> key;

    if (key < 0 || key > 255) {
        cerr << "Key must be between 0 and 255." << endl;
        return 1;
    }

    // Read the input file into a vector
    vector<unsigned char> data = readFile(inputFilename);

    // Encrypt or decrypt the data
    xorCipher(data, key);

    // Write the processed data to the output file
    writeFile(outputFilename, data);

    cout << "Processing complete. Check the output file: " << outputFilename << endl;

    return 0;
}

#include <iostream>

#include <fstream>

#include <vector>

using namespace std;

// Function to encrypt or decrypt data using XOR cipher

void xorCipher(vector<unsigned char>& data, unsigned char key) {

for (auto& byte : data) {

byte ^= key;

}

// Function to read a binary file into a vector

vector<unsigned char> readFile(const string& filename) {

ifstream file(filename, ios::binary | ios::ate);

if (!file) {

cerr << "Error opening file: " << filename << endl;

exit(1);

}

streamsize size = file.tellg();

file.seekg(0, ios::beg);

vector<unsigned char> buffer(size);

if (!file.read(reinterpret_cast<char*>(buffer.data()), size)) {

cerr << "Error reading file: " << filename << endl;

exit(1);

}

return buffer;

}

// Function to write a vector to a binary file

void writeFile(const string& filename, const vector<unsigned char>& data) {

ofstream file(filename, ios::binary);

if (!file) {

cerr << "Error opening file: " << filename << endl;

exit(1);

}

file.write(reinterpret_cast<const char*>(data.data()), data.size());

}

int main() {

string inputFilename, outputFilename;

unsigned char key;

cout << "Enter the input file name: ";

cin >> inputFilename;

cout << "Enter the output file name: ";

cin >> outputFilename;

cout << "Enter the encryption/decryption key (0-255): ";

cin >> key;

if (key < 0 || key > 255) {

cerr << "Key must be between 0 and 255." << endl;

return 1;

}

// Read the input file into a vector

vector<unsigned char> data = readFile(inputFilename);

// Encrypt or decrypt the data

xorCipher(data, key);

// Write the processed data to the output file

writeFile(outputFilename, data);

cout << "Processing complete. Check the output file: " << outputFilename << endl;

return 0;

}

Explanation:

XOR Cipher Function (xorCipher):
- The xorCipher function performs encryption or decryption by applying an XOR operation with a single byte key. XOR is a symmetric operation, so it can be used for both encryption and decryption.
- It iterates through each byte of the data and applies the XOR operation.
File Reading (readFile):
- The readFile function opens a binary file and reads its content into a vector<unsigned char>
  
  . This vector represents the raw binary data of the file.
- It uses ios::ate to move to the end of the file and determine its size before reading the data into the buffer.
File Writing (writeFile):
- The writeFile function writes the contents of a vector<unsigned char> to a binary file. It takes the filename and the data to be written.
Main Function (main):
- The main function prompts the user to enter the input and output filenames, as well as the encryption/decryption key.
- It reads the binary data from the input file, processes it using the XOR cipher, and writes the result to the output file.
- The key must be in the range of 0-255 as it is a single byte used for the XOR operation.

Possible Enhancements:

Advanced Encryption: Implement more secure encryption algorithms such as AES for better security.
Error Handling: Improve error handling with more detailed messages and recovery options.
File Format Validation: Check and validate the format of the audio file to ensure compatibility.
GUI Interface: Develop a graphical user interface (GUI) to make the encryption/decryption process more user-friendly.

Explanation:

Possible Enhancements:

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