Hash with Matrix

The following example demonstrates how to hash customer data with the TEAgentMatrix class.

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Code Sample

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

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<cpp_matrix_hash.cpp>

/*****************************************************************************************
*  c++_matrix_hash.cpp
* 
*  Use TEAgentMatrix for data hashing. 
*
*  No TE connection is needed for data hashing.
*
******************************************************************************************/

#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         = 8888;            // port number
	string strUsername   = "ls";            // username
	string strPassword   = "password";      // password  

	try
	{
		// Create TEAgentMatrix object
		TEAgentMatrix matrix;   

		// Original data for encryption
		string str1_1 = "test string (1, 1)";
		string str1_2 = "test string (1, 2)";
		string str2_1 = "test string (2, 1)";
		string str2_2 = "test string (2, 2)";
		string str2_3 = "test string (2, 3)";
		string str3_1 = "test string (3, 1)";

		// Set matrix for encryption
		matrix.setElement(1, 1, str1_1);  // set element (1, 1)
		matrix.setElement(1, 2, str1_2);
		matrix.setElement(2, 1, str2_1);  // set element (2, 1)
		matrix.setElement(2, 2, str2_2);
		matrix.setElement(2, 3, str2_3);
		matrix.setElement(3, 1, str3_1);  // set element (3, 1)

		printf("Original data:\n");			
		cout << "Original data:\n";
		cout << str1_1 << ", " << str1_2 << endl;
		cout << str2_1 << ", " << str2_2 << ", " << str2_3 << endl;
		cout << str3_1 << endl;

		// Decide which column to hash, and set the salts for them
		TEUINT2STR s1(make_pair((uint32_t)1, string("this is a salt")));		// set salt for first column
		TEUINT2STR s3(make_pair((uint32_t)3, string("this is another salt")));	// set salt for third column
		TEObjectContainer container;
		container.add(&s1);
		container.add(&s3);
		matrix.setHashColumns(container);

		string strHash1_1;
		string strHash2_1;
		string strHash3_1;
		string strHash2_3;

		// Get the hash values
		matrix.setEncodeMode(true);
		matrix.getHashElement(1, 1, strHash1_1); 
		matrix.getHashElement(2, 1, strHash2_1); 
		matrix.getHashElement(3, 1, strHash3_1); 
		matrix.getHashElement(2, 3, strHash2_3); 
		
		cout << "\nHashed values of first column:\n";
		cout << strHash1_1 << endl;
		cout << strHash2_1 << endl;
		cout << strHash3_1 << endl;
		cout << "\nHashed values of third column:\n";
		cout << strHash2_3 << endl;

		// Show salts used
		matrix.getHashColumns(container);
		cout << "\nSalt used:\n";
		for (int i=0; i<container.size(); i++)
		{
			const TEUINT2STR* salt = static_cast<const TEUINT2STR*>(container[i]);
			cout << "Column Number: " << salt->getValue().first 
				<< ", Salt: " << salt->getValue().second << endl;
			
		} 
	}
	catch (TEException &e)
	{
		cout <<  e.getAllMessages() << endl;
	}
	catch (...)
	{
		cout << "Unexpected error" << endl;
	}

	return 0;
}

Output 
Original data:
Original data:
test string (1, 1), test string (1, 2)
test string (2, 1), test string (2, 2), test string (2, 3)
test string (3, 1)

Hashed values of first column:
wi65162gbHYtUwQKkMq7hjbc8IA=
Jn24Viu/iNehAruztmz0Whx07Ww=
qxcqAHM5CoiXXgntGYDAt7eoAh4=

Hashed values of third column:
VMLqMRKz2hOjiD81ZYw4NLRN5pE=

Salt used:
Column Number: 1, Salt: this is a salt
Column Number: 3, Salt: this is another salt