Create a menu driven program that will (#2 and #3 is make testing easier)

It should provide the user with a choice to either encrypt or decrypt a file; for example:

1 Encrypt

2 Decrypt

3 About

4 Quit

If the user selects to encrypt, a file you should simply always assume the files name is Data.in and the output is Data.out

If the user selects to decrypt, a file should simply always be assumed to be name Data.out and it is to be decrypted to Data.in

It should use a Caesar cipher (see textbook)

It should always prompt the user for a key, so different users can use the algorithm.

You need to submit your .cpp source code make certain that your code uses functions or classes and has short informative comments.

See next page for textbook help.

PART OF THE CODE:

// based on Window's CertUtil.exe command line // search for certutil on // https://docs.microsoft.com // // date: 16 May 2018 // There are C++ objects that do this better. #include  #include  #include  using namespace std; // sample commands const string HELP_ALL = "-? -v"; // specific help - -? const string HELP_HASH = "-hashfile -?"; const string USAGE = "CertUtil [Options] -hashfile InFile [HashAlgorithm]"; // list of current algorithms const int N = 7; const string Hashs[N] ={"MD2", "MD4", "MD5", "SHA1", "SHA256", "SHA384", "SHA512"}; void CertUtil(const string ¶) { string cmd = "certutil "+ para; system( cmd.c_str() ); // send to console. } void getFile(string &fn ){ cout <<"filename and path:"; cin >> fn; } void display(const string alg[], int N) { cout <<" your encryption choices "; for(int i=0; i> h; string algorithm =Hashs[h]; // build command-line string string cmd = "-hashfile "+filename+" "+algorithm; CertUtil(cmd); // go do it.. cout << USAGE << endl; // help with usage cmd = "pause"; // command line system( cmd.c_str() ); // send to console return 0; }

// based on Window's CertUtil.exe command line // search for certutil on // https://docs.microsoft.com // // date: 16 May 2018 // There are C++ objects that do this better. #include  #include  #include  using namespace std; // sample commands const string DECODE = "-decode "; // Decode a Base64-encoded file const string ENCODE = "-encode "; // Encode a Base64-encoded file const string HASHFILE = "-decode "; // Generate and display a cryptographic hash const string HELP_ALL = "-? -v"; // specific help - -? const string HELP_HASH = "-hashfile -?"; const string USAGE = "CertUtil [Options] -hashfile InFile [HashAlgorithm]"; // list of current algorithms const int N = 7; const string Hashs[N] ={"MD2", "MD4", "MD5", "SHA1", "SHA256", "SHA384", "SHA512"}; void CertUtil(const string ¶) { string cmd = "certutil "+ para; system( cmd.c_str() ); // send to console. } void getFile(string &fn ){ cout<<"filename and path:"; cin >> fn; } void display(const string alg[], int N) { cout <<" your encryption choices "; for(int i=0; i