menu driven application that takes file (must function with binary or text) as input, stores via chosen cryptographic method, then retrieves securely if appropriate password/key is made available. in matlab

main.m
while true
    % Display menu options
    fprintf('Select an option:\n');
    fprintf('1. Encrypt file\n');
    fprintf('2. Decrypt file\n');
    fprintf('3. Exit\n');
    
    % Get user input for menu selection
    option = input('Enter option number: ');
    
    if option == 1
        % Get filename to encrypt
        filename = input('Enter filename to encrypt (including extension): ', 's');
        
        % Get encryption method
        fprintf('Select an encryption method:\n');
        fprintf('1. AES\n');
        fprintf('2. DES\n');
        method = input('Enter method number: ');

        % Get encryption key
        key = input('Enter encryption key: ', 's');
        
        % Read file contents
        fileID = fopen(filename, 'r');
        data = fread(fileID, '*uint8');
        fclose(fileID);

        % Encrypt data using chosen method
        switch method
            case 1  % AES
                data_encrypted = AESencrypt(data, key);
            case 2  % DES
                data_encrypted = DESencrypt(data, key);
            otherwise
                fprintf('Invalid method selected.\n');
                continue
        end
        
        % Write encrypted data to file
        fileID = fopen([filename, '.enc'], 'w');
        fwrite(fileID, data_encrypted);
        fclose(fileID);
        
        % Display success message
        fprintf('File has been encrypted and saved as %s.\n', [filename, '.enc']);

    elseif option == 2
        % Get filename to decrypt
        filename = input('Enter filename to decrypt (including extension): ', 's');
        
        % Get decryption method
        fprintf('Select a decryption method:\n');
        fprintf('1. AES\n');
        fprintf('2. DES\n');
        method = input('Enter method number: ');

        % Get decryption key
        key = input('Enter decryption key: ', 's');
        
        % Read file contents
        fileID = fopen(filename, 'r');
        data_encrypted = fread(fileID, '*uint8');
        fclose(fileID);

        % Decrypt data using chosen method
        switch method
            case 1  % AES
                data_decrypted = AESdecrypt(data_encrypted, key);
            case 2  % DES
                data_decrypted = DESdecrypt(data_encrypted, key);
            otherwise
                fprintf('Invalid method selected.\n');
                continue
        end
        
        % Write decrypted data to file
        fileID = fopen([filename(1:end-4), '_decrypted', filename(end-3:end)], 'w');
        fwrite(fileID, data_decrypted);
        fclose(fileID);
        
        % Display success message
        fprintf('File has been decrypted and saved as %s.\n', [filename(1:end-4), '_decrypted', filename(end-3:end)]);

    elseif option == 3
        % Exit the program
        fprintf('Exiting program.\n');
        break
        
    else
        % Invalid input
        fprintf('Invalid option selected.\n');
    end
    
end
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