/*
 * hw8.cpp
 *
 *  Created on: Mar 26, 2014
 *      Author: carola
 */



#include<iostream>
using namespace std;



/***********************************************************************
 * Function and class headers. This should ideally be in a separate file cryptoLib.h
 ***********************************************************************/


/*
 * TODO:
 *
 * Class or struct definitions go here for:
 *   User
 *   PublicKeyDB
 */
class PublicKeyDB{

	/* TODO: Fill in details. */
};


/*************************************************************************
 * Global variables and constants
 *************************************************************************/
// Mysterious library function that returns public and private encryption keys. Those should be generated from large prime numbers.
int c=0;
const int keys[15]= {95, 5, 29, 119, 7, 55, 115, 7, 63, 161, 7, 19, 121, 11, 91};
void next_n_e_d(int* n, int* e, int* d){
	*n=keys[c++];
	*e=keys[c++];
	*d=keys[c++];
	c=c%15;
}

// Default capacity for strings.
#define STRING_CAPACITY  256

// Global storage for all public keys for all users.
PublicKeyDB publicKeys = PublicKeyDB();


/**********************************************************************************************
 * Function and class implementations. This should ideally be in a separate file cryptoLib.cpp
 **********************************************************************************************/


int pow_mod(int a, int b, int m){
	// Computes a^b mod m. Assume b>0.
	int result = 1;
	int i;
	for(i=0; i<b; i++)
		result = (result*a)%m;

	return result;
}

// Utility functions for string manipulation:
char shiftChar(int shift, char c){
	return (c-32+95+shift)%95+32;
}


char* shiftString(int shift, char* input){
	/*
	 * TODO:
	 *
	 * Add code
	 */

}

/*
 * TODO:
 *
 * Class implementations go here for:
 *   PublicKeyDB
 *   User
 */


/*
 * Implementations for class PublicKeyDB
 */


/*
 * Implementations for class User
 */



/**********************************************************************************************
 * main()
 **********************************************************************************************/


int main(){

	/*
	 * TODO:
	 *
	 * Test code goes here.
	 *
	 */

	 char *secretMessageForAlice = "^ro*~o}~*q|kno}*k|o*oxmynon*sx*K]MSS8";









	return 0;
}