Working with a File

The TEAgentFile class represents a file. It is used to encrypt, decrypt a file given the file path. The following sequence describes how to encrypt and decrypt a file using the TEAgentFile class.

1. Create a TEAgentFile object
2. Set the path of the file to be encrypted or decrypted and set the path of the output file
3. Attach a connection
4. Encrypt or decrypt the file
5. Detach the connection

The following example demonstrates file encryption and decryption using this class.

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Code Sample

See the C++ environment settings for details on setting the project environment.

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<cpp_file.cpp>

/*****************************************************************************************
*  cpp_file.cpp
*
*     
******************************************************************************************/

#include <iostream>
#include "teconnection.h"
#include "teagent.h"
#include "teexception.h"

using namespace ERUCES;
using namespace std;

int main()
{
	string strServerName = "localhost";     // server name
	long   lPort         = 5050;            // port number
	string strUsername   = "ls";            // username
	string strPassword   = "password";      // password  

	try
	{
		auto_ptr<TEConnection> conn = 
			TEConnection::createInstance(TEConnection::SecureConnection);
		
		// Open connection to the server
		conn->open(strServerName, lPort, strUsername, strPassword);

		cout << "Connected to " << strServerName << " at " << lPort 
			<< " as " << strUsername << "\n" << endl; 
		
		// Create a TEAgentFile object
		TEAgentFile file;

		// Set original data file and encrypted output file
		file.setInputFileName(".\\Test.txt");
		file.setOutputFileName(".\\Test.txt.eru");

		// Encrypt file
		file.attachConnection(conn.get());
		file.encrypt();
		file.detachConnection();

		cout << "File " << file.getInputFileName() << " was encrypted, the output file is " << 
			file.getOutputFileName() << endl;

		file.clear();
		// Set encrypted data file and decrypted output file
		file.setInputFileName(".\\Test.txt.eru");
		file.setOutputFileName(".\\Test.txt.out");
		
		// Decrypt file
		file.attachConnection(conn.get());
		file.decrypt();
		file.detachConnection();

		cout << "File " << file.getInputFileName() << " was decrypted, the output file is " << 
			file.getOutputFileName() << endl;

		// Close conneciton
		conn->close();

		cout << "Disconnected from server." << endl;
	}
	catch (TEException &e)
	{
		cout <<  e.getAllMessages() << endl;
	}
	catch (...)
	{
		cout << "Unexpected error" << endl;
	}

	return 0;
}

Output
Connected to localhost at 8888 as ls

File .\Test.txt was encrypted, the output file is .\Test.txt.eru
File .\Test.txt.eru was decrypted, the output file is .\Test.txt.out
Disconnected from server.