/* Put this in the same directory as sha-256.h and sha-256.c 
 * Build with this command:  g++ login_system.cpp sha-256.c
 * If you have an error about "invalid conversion..." on line 139, change 
 * line 139 to this:
 * const uint8_t *p = (const uint8_t*)data;
 * C++ requires an explicit cast here, but C does not.
 */

#include "sha-256.h"
#include<iostream>
#include<cstdio>
using namespace std;

const char *pwdhash = "4ea511963388132dd56b3b23fdfa1a25b952a8fe958afc7938622a33156bebf3";

void hash_to_string(char string[65], const uint8_t hash[32]){ 
	for (uint8_t i = 0; i < 32; i++) { 
		string += sprintf(string, "%02x", hash[i]); 
	} 
} 

void win(){
	cout << "You got the password right!\n";	
}

int main(){
	string password;
	cout << "Enter the password:  ";
	cin >> password;
	uint8_t hash[32];
	calc_sha_256(hash, password.c_str(), password.length());
	char hash_string[65];
	hash_to_string(hash_string, hash);
	if(strcmp(hash_string, pwdhash)){
		cout << "Sorry, you don't seem to know the password!" << endl;
		return 1;
	}
	win();
	return 0;
}