Prince of Persia (NES) password generator

angrylion · Post by **angrylion** » Thu Jul 24, 2008 3:29 pm

Prince of Persia (NES) password generator for Windows. Source code included. Enjoy and comment...

http://w14.easy-share.com/1701000098.html

jargon · Post by **jargon** » Thu Aug 14, 2008 5:33 am

Okay, "PRINCE.EXE" has been verified by Mottzilla as clean.

I will port the PRINCE.C code to PRINCE.JS and link it in a response.

If anyone wants to disassemble that PRINCE.EXE and look it over line by line be my guest. But at first glance PRINCE.C looks 100% bogus. (It actually works fine. Just forgot how C worked, lol.)

-edit-
(Thanks, Mottzilla)

The source does look functional, and does in-fact generate Prince of Persia passwords.

However, I suggest compiling from "PRINCE.C" and running that, rather than *just* running "PRINCE.EXE". (For learning purposes.)

jargon · Post by **jargon** » Sat Aug 16, 2008 3:16 am

angrylion wrote:Prince of Persia (NES) password generator for Windows. Source code included. Enjoy and comment...

http://w14.easy-share.com/1701000098.html

This is what i now have thus far as JavaScript: (no, it doesn't seem to work due to some glitch on my behalf.)

If anyone can figure out why the following JavaScript I wrote doesn't do anything please post the corrections in this thread. (Firebug says nothing is wrong with it for some reason.)

Code: Select all

<html><head><title>PRINCE OF PERSIA PASSWORD PROGRAM</title></head><body><h1>PRINCE OF PERSIA PASSWORD PROGRAM</h1>
<script type="text/javascript">
var var_Password=new Array();
var_Password[0]=0;	/*$0766 in RAM, when a player enters it*/
var_Password[1]=0;	/*$0767 in RAM, when a player enters it*/
var_Password[2]=0;	/*$0768 in RAM, when a player enters it*/
var_Password[3]=0;	/*$0769 in RAM, when a player enters it*/
var_Password[4]=0;	/*$076A in RAM, when a player enters it*/
var_Password[5]=0;	/*$076B in RAM, when a player enters it*/
var_Password[6]=0;	/*$076C in RAM, when a player enters it*/
var_Password[7]=0;	/*$076D in RAM, when a player enters it*/
var var_Invalidity=0;	/*$0764 in RAM*/
var var_Level=0;		/*$0070 in RAM*/
var var_TimeTens=0;	/*$04C5 in RAM*/
var var_TimeOnes=0;	/*$04C6 in RAM*/
var var_Byte4BF=0;
var var_Byte17=0;
var var_Byte18=0;
var var_a=0;
var var_x=0;
var var_c=0;		/*carry flag*/
/*former char Byte76A is Password[4] now, former char Byte76C is Password[6] now*/

main();

function main()
{
	var var_Choice=prompt('Enter g if you'd like to generate a new password./nEnter a to analyze an existing password./n','');
	/*flushall();*/
	if (var_Choice=='a')
		PasswordChecker();
	if (var_Choice=='g')
		PasswordGenerator();
	if (var_Choice=='s')	/*'level function' is basic when generating a pass*/
		BuildORTable();	/*so here a bit of 'hidden' investigation, which will be useful*/
	/*if I ever decide to rewrite this prog to output all passes possible, not just one*/
	prompt('Press enter to quit./n','');
	/*getch();*/
	return 0;
}

function PasswordChecker()
{
	var var_InputString=new Array();	/*one extra byte needed due to fgets*/
	var_i=0;
	var var_string=prompt('Please enter your password to test:/n','');
	var_InputString(0)=ord(substr(var_string,0,1);)
	var_InputString(1)=ord(substr(var_string,1,1);)
	var_InputString(2)=ord(substr(var_string,2,1);)
	var_InputString(3)=ord(substr(var_string,3,1);)
	var_InputString(4)=ord(substr(var_string,4,1);)
	var_InputString(5)=ord(substr(var_string,5,1);)
	var_InputString(6)=ord(substr(var_string,6,1);)
	var_InputString(7)=ord(substr(var_string,7,1);)
	for(var_i=0;var_i<8;var_i++)
	{
		if((var_InputString[var_i]>57)||(var_InputString[var_i]<48))
		{
			document.write('This string contains non-digits.<br>');
			return;
		}
		else
			var_Password[var_i]=var_InputString[var_i]-48;	/*ascii to digit*/
	}
	sub_BB4F(var_Password);
	if (var_Invalidity==1)
	{
		document.write('This password is invalid.<br>');
		return;
	}
	document.write('Level: '+var_Level);
	document.write(' Time: '+TimeTens+''+TimeOnes);
	if (var_Level==15)
	document.write('Level 15 doesn't exist. So-called level 15 passwords are programming mistakes and cause system hang.<br>');
	if (var_Level==16)
	document.write('Level 16 doesn't exist. So-called level 16 passwords are programming mistakes and lead you to a buggy screen where Prince can't move.<br>');
	return;
}

function sub_BB4F(var_Password)	/*var_BB4F*/
{
	var_a=0;
	var_x=0;
	while(var_x<8)
	{
		var_a=var_a+var_Password[var_x];
		var_x++;
	}
	if(var_a==0)
	{
		var_Invalidity=1;	/*var_BBC0*/
		return;
	}
	var_Byte17=var_Password[4];	/*var_BB63*/
	var_Byte18=var_Password[6];
	var_Password[4]=0;
	var_Password[6]=0;
	sub_BB21();	/*var_BB72,calculates and writes 1st checksum to Password[4], 2nd checksum to Password[6]*/
	if (var_Password[4]!=var_Byte17)
	{
		var_Invalidity=1;
		return;
	}
	if (var_Password[6]!=var_Byte18)	/*var_BB7C*/
	{
		var_Invalidity=1;
		return;
	}
	var_Invalidity=0;//var_BB85
	var_a=var_Password[7];
	sub_BBEA();
	var_a=var_a&3;	/*var_BB8E*/
	var_a=var_a*4;
	var_Password[7]=var_a;
	var_a=var_Password[1];
	sub_BBE0();	/*var_BB98*/
	var_a=var_a|var_Password[7];
	var_Level=var_a+1;	/*+1 is my insertion*/
	/*if (Level!=1)//I chose to omit this var_BBA2-var_BBA4 code b/c it's unknown what byte at var_06EE means*/
	var_a=var_Password[0];
	sub_BBE0();	/*var_BBAA*/
	var_TimeTens=var_a;
	var_a=var_Password[3];
	sub_BBEA();
	var_TimeOnes=var_a;
	return;	/*var_BBBF*/
}

function SEC_SBC_6502(var_operand)
{
	var_c=1;
	if((var_a-var_operand)>=0)
		var_a=var_a-var_operand;
	else
	{
		var_a=var_a-var_operand+256;
		var_c=0;
	};
}

function ADC_6502_simplified(var_operand)
{
	if((var_a+var_operand)<256)
	var_a=var_a+var_operand;
	else var_a=var_a+var_operand-256;
}

function sub_BB21()
{
	var_x=0;
BB23:
	var_a=var_Password[4];
	var_a=var_a+var_Password[var_x];
	if(var_a<10)
	{
BB46:
	var_Password[4]=var_a;	/*var_BB46*/
		var_x++;
		if (var_x!=8)
		goto BB23;
		else return;	/*var_BB4E*/
	}
	else
	/*var_BB2E*/
	{
		Byte4BF=a;
		a=Password[6];
		a++;//we came here b/c c=1
		if (a<10)
		goto BB3D;
		else
		SEC_SBC_6502(10);//can we get here? I doubt...
BB3D:	var_Password[6]=a;
		a=Byte4BF;
		SEC_SBC_6502(10);//var_BB44, no danger of negative result
		goto BB46;
	}
}

function sub_BBE0()
{
	SEC_SBC_6502(var_Password[2]);
	if (var_c==1)
		return;
	ADC_6502_simplified(10);
	return;
}

function sub_BBEA()
{
	SEC_SBC_6502(var_Password[5]);
	if(var_c==1)
		return;
	ADC_6502_simplified(10);
	return;
}

function PasswordGenerator()
{
	var var_DesiredLevel=0;
	var var_DesiredTimeTens=0;
	var var_DesiredTimeOnes=0;
	var_GeneratedPass=new Array();
	var_GeneratedPass[0]=0;
	var_GeneratedPass[1]=0;
	var_GeneratedPass[2]=0;
	var_GeneratedPass[3]=0;
	var_GeneratedPass[4]=0;
	var_GeneratedPass[5]=0;
	var_GeneratedPass[6]=0;
	var_GeneratedPass[7]=0;
	var_InputLevel=new Array();
	var_InputLevel[0]=0;	/*one extra char needed b/c of fgets*/
	var_InputLevel[1]=0;	/*one extra char needed b/c of fgets*/
	var_InputLevel[2]=0;	/*one extra char needed b/c of fgets*/
	var_InputTime=new Array();
	var_InputTime[0]=0;
	var_InputTime[1]=0;
	var_InputTime[2]=0;
	var_i=0;
	var var_level=prompt('Enter a desired level: ','');
	var_InputLevel[0]=ord(substr(var_level,0,1));
	var_InputLevel[1]=ord(substr(var_level,1,1));
	var var_time=('Enter remaining time: ','');
	var_InputTime[0]=ord(substr(var_time,0,1));
	var_InputTime[1]=ord(substr(var_time,1,1));
	if((var_InputLevel[0]==32)||(var_InputLevel[0]==10))/*our defence against user's folly comes first*/
		var_InputLevel[0]=48;
	if((var_InputTime[0]==32)||(var_InputTime[0]==10))
		var_InputTime[0]=48;
	if((var_InputLevel[1]==32)||(var_InputLevel[1]==10))
	{
		var_InputLevel[1]=var_InputLevel[0];
		var_InputLevel[0]=48;
	}
	if((var_InputTime[1]==32)||(var_InputTime[1]==10))
	{
		var_InputTime[1]=var_InputTime[0];
		var_InputTime[0]=48;
	}
	for(var_i=0;var_i<2;var_i++)/*then comes a real check*/
	{
		if ((var_InputLevel[var_i]>57)||(var_InputLevel[var_i]<48)||(var_InputTime[var_i]>57)||(var_InputTime[var_i]<48))
		{
			document.write('Your data contains non-digits.<br>');
			return;
		}
	};
	if((atoi(var_InputLevel)>0)&&(atoi(var_InputLevel)<15))
	var_DesiredLevel=atoi(var_InputLevel);
	else
	{
		document.write('Your level is out of 1-14 range.<br>');
		return;
	};
	var_DesiredTimeTens=var_InputTime[0]-48;	/*0 mins is also possible:11111112*/
	var_DesiredTimeOnes=var_InputTime[1]-48;	/*99 mins is also possible:99097030*/
	var_SimplifiedLevelGenerator(var_GeneratedPass, var_DesiredLevel);
	var_GeneratedPass[0]=var_DesiredTimeTens;
	var_GeneratedPass[3]=var_DesiredTimeOnes;	/*now 6 digits are filled*/
	for(var_i=0;var_i<8;var_i++)
		var_Password[var_i]=var_GeneratedPass[var_i];
	var_Password[4]=0;
	var_Password[6]=0;
	sub_BB21();	/*calculates checksums for us*/
	var_GeneratedPass[4]=var_Password[4];
	var_GeneratedPass[6]=var_Password[6];	/*now all 8 digits are stored*/
	for(var_i=0;var_i<8;var_i++)	/*let's check our password*/
	var_Password[var_i]=var_GeneratedPass[var_i];
	sub_BB4F(var_Password);
	if(var_Invalidity==1)
	{
		document.write('This passgen miserably failed due to bugs.<br>');
		return;
	}
	document.write('Your password is generated and confirmed to be correct: <br>');
	for(var_i=0;var_i<8;var_i++)
	{
		document.write(var_GeneratedPass[var_i]);
	}
	document.write('<br>');
	return;
}

function BuildORTable()
{
	/*our goal's to find all n2res/n8res combos for the given level*/
	var_x=0;
	var_y=0;
	var var_current_result=0;
	var var_n2results=new Array();
	var_n2results[0]=0;	/*SBC(N2-N3)*/
	var_n2results[1]=1;
	var_n2results[2]=2;
	var_n2results[3]=3;
	var_n2results[4]=4;
	var_n2results[5]=5;
	var_n2results[6]=6;
	var_n2results[7]=7;
	var_n2results[8]=8;
	var_n2results[9]=9;
	var_n8results[0]=0;
	var_n8results[1]=4;
	var_n8results[2]=8;
	var_n8results[3]=12;
	for(var_x=0;var_x<10;var_x++)
	{
		for(var_y=0;var_y<4;var_y++)
		{
			var_current_result=var_n2result[var_x]|var_n8result[var_y];
			if(var_current_result<14)
			document.write(var_current_result+1)+': '+var_n2result[var_x]+' '+var_n8result[var_y])+'<br>');
		}
	}
	document.write('Now smaller results: <br>');
	for(var_x=0;var_x<10;var_x++)
	/*seek what sBC(N8-N6) should amount to*/
	{
		for(var_y=0;var_y<4;var_y++)
		{
			var_current_result=(var_x&3)*var_4;
			if(var_current_result==var_n8result[var_y])
			document.write(var_n2result[var_y].': '.var_x.'<br>');
		}
	}
	return 0;
}

function BuildParticularLevelsArray(var_DesiredLevel)
{
	return 0;
}

function SimplifiedLevelGenerator(var_PassToFill,var_Level)//finds just one 2nd,3rd,6th,8th digit combo
{
	var_x=0;
	var_y=0;
	var var_n2result=0;
	var var_n8result=0;
	var var_current_result=0;
	var var_n2results=new Array();
	var_n2results[0]=0;	/*SBC(N2-N3)*/
	var_n2results[1]=1;
	var_n2results[2]=2;
	var_n2results[3]=3;
	var_n2results[4]=4;
	var_n2results[5]=5;
	var_n2results[6]=6;
	var_n2results[7]=7;
	var_n2results[8]=8;
	var_n2results[9]=9;
	var_n8results[0]=0;
	var_n8results[1]=4;
	var_n8results[2]=8;
	var_n8results[3]=12;
	var var_n8minorresult=0;	//SBC(N8-N6)
	for(var_x=0;var_x<10;var_x++)
	{
		for(var_y=0;var_y<4;var_y++)
		{
			var_current_result=var_n2results[var_x]|var_n8results[var_y];
			if(var_current_result==(var_Level-1))
			/*level x is internally stored in x-1 presentation*/
			{
				var_n2result=var_n2results[var_x];
				var_n8result=var_n8results[var_y];
				break;
			};
		}
	}
	for(var_x=0;var_x<10;var_x++)
	{
		if ((var_x&3)*4==var_n8result)
		{
			var_n8minorresult=var_x;
			break;
		}
	}
	var_PassToFill[2]=0;
	var_PassToFill[1]=var_n2result;
	var_PassToFill[5]=0;
	var_PassToFill[7]=var_n8minorresult;
}
function getinput(var_box,var_default){
	return prompt(var_box, var_default);	
}
function atoi(var_string){
	return ParseInt(var_string);
}
function ord(var_string ) {
    return var_string.charCodeAt(0);
}
</script>
</body></html>

jargon · Post by **jargon** » Tue Aug 19, 2008 9:57 am

If someone with more experience with JavaScript wants to fix the js version i made of angrylion's "Prince of Persia" password generator; be my guest. Firebug isn't reporting any errors.

MottZilla · Post by **MottZilla** » Tue Aug 19, 2008 1:37 pm

Nice job angrylion. You can all ignore you know who, there is nothing "fishy" with the password generator.

nesdev.org

Prince of Persia (NES) password generator

Prince of Persia (NES) password generator

Warning

Re: Prince of Persia (NES) password generator