Tips for resolving this JavaScript conditional statement

Can you help me understand how to make this if statement true and show an alert message? I'm unsure about the significance of 0x4, 0x3, and 0x05. How can we modify this code to trigger the alert?

var Ft32A = [
    function (x,y) {return x+y},
    function (x,y) {return x-y},
    function (x,y) {return x/y},
    function (x,y) {return x*y},
    function (x,y) {return x==y},
    function (x,y) {return (y)}
];
function login() {
    var psw = password.value;
    if(
        Ft32A[0x4](psw.length,10)&&
        Ft32A[0x4](Ft32A[0x1](psw.charAt(0x01),psw.charAt(0x2)),0)&&
        Ft32A[0x4]((psw.charAt(6)),Math.abs(Ft32A[0x1](10,11)))&&
        psw.split("_")[1].startsWith(String.fromCharCode(78))&&
        Ft32A[0x4](Ft32A[3](psw.charAt(1),4),0)&&
        Ft32A[0x4](psw.split('_').length,2)&&
        psw.split('_')[0].charAt(psw.split('_')[0].length-1)=="DADADADA".charAt(2) &&
        Ft32A[0x3](psw.charCodeAt(psw.length-1),3)==348 &&
        Ft32A[1](psw.charCodeAt(8),psw.charCodeAt(7))==1 &&
        (Ft32A[0](psw.charCodeAt(8),psw.charCodeAt(7))-1)/2==103 &&
        psw.startsWith("G")
    ) {
        alert("Flag:{"+Ft32A[0x05]("",password.value)+"}");
    }
}

javascriptarrayshex

Answer №1

Deciphering this is quite simple; the code systematically reveals which character corresponds to each position.

Let's break it down line by line:

Ft32A[0x4](psw.length,10) // The password has 10 digits 
-> ??????????
Ft32A[0x4](Ft32A[0x1](psw.charAt(0x01),psw.charAt(0x2)),0) // Digits 1 and 2 are identical  
-> ?11???????
Ft32A[0x4]((psw.charAt(6)),Math.abs(Ft32A[0x1](10,11))) // Digit 6 is a 1 
-> ?11???1???
psw.split("_")[1].startsWith(String.fromCharCode(78)) //The password includes "_", with the right part starting with an N
-> ?11?_N1???
 Ft32A[0x4](Ft32A[3](psw.charAt(1),4),0 // Multiplying digit 1 by 4 results in 0
-> ?00?_N1???
Ft32A[0x4](psw.split('_').length,2) // There is only 1 _
-> ?00?_N1???
psw.split('_')[0].charAt(psw.split('_')[0].length-1)=="DADADADA".charAt(2) // The last character before the _ is a D
-> ?00D_N1???
 Ft32A[0x3](psw.charCodeAt(psw.length-1),3)==348 // The final character is a "t"
-> ?00D_N1??t
 Ft32A[1](psw.charCodeAt(8),psw.charCodeAt(7))==1 // Difference between digit 8 and digit 7 is one
-> ?00D_N1ABt
Ft32A[0](psw.charCodeAt(8),psw.charCodeAt(7))-1)/2==103 //Digits 8 and 7 represent h and g
-> ?00D_N1ght
psw.startsWith("G") //Password commences with a G
-> G00D_N1ght

The key is:

Flag:{G00D_N1ght}

Answer №2

Ft32A is a variable that stores an array consisting of 6 functions.

var Ft32A = [
    function (x,y) {return x+y},
    function (x,y) {return x-y},
    function (x,y) {return x/y},
    function (x,y) {return x*y},
    function (x,y) {return x==y},
    function (x,y) {return (y)}
];

If you want to run the first function in the array, you can do so by calling:

Ft32A[0](5, 10); // first function: function (x,y) {return x+y}

In this case, Ft32A[0] represents the first element which contains the function function (x,y) {return x+y}, and then followed by (5, 10) which are the arguments needed for the function.

You also have the option to reference the first function using hexadecimal notation:

Ft32A[0x0](5, 10);

Similarly, you can call the fifth function with:

Ft32A[0x4](5, 10); // fifth function: function (x,y) {return x==y}

The use of the if statement involves running various functions and ensuring that all return values must be true for the condition inside the if statement to be met.

Thus, your task is to determine the specific string value that would pass through all these tests and satisfy the if condition.

Answer №3

Well this code is not the prettiest, but let's break it down step by step:

console.log(0x4);

Printing out 4, which seems strange and leaves me questioning the purpose.

Ft32A[0x4](psw.length,10)

This retrieves the fifth element from the array Ft32A.

function (x,y) {return x==y}

Let's dissect this function further.

function login() {
var psw = password.value;
if( 
    psw.length == 10 &&
    ((psw.charAt(0x01) - psw.charAt(0x2)) == 0) &&
    ((psw.charAt(6)) == Math.abs((10 - 11))) &&
    psw.split("_")[1].startsWith(String.fromCharCode(78)) &&
    ((psw.charAt(1) * 4) == 0) &&
    (psw.split('_').length == 2)&&
    psw.split('_')[0].charAt(psw.split('_')[0].length-1) == "DADADADA".charAt(2) &&
    (psw.charCodeAt(psw.length-1) * 3) == 348 &&
    (psw.charCodeAt(8) - psw.charCodeAt(7)) == 1 &&
    ((psw.charCodeAt(8) + psw.charCodeAt(7)) - 1) / 2 == 103 &&
    psw.startsWith("G"))
    {
        alert("Flag:{"+password.value+"}");
    }

}

This piece of code appears to be either poorly written or part of a complex challenge.

I couldn't tell you how to successfully pass this test, as it seems quite intricate.

I recommend analyzing each line thoroughly for clarification.

Hopefully this sheds some light on the matter.

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